/* roulang page: index */
:root {
            --bg-dark: #0B0F14;
            --bg-card: #141B24;
            --bg-deep: #0E1319;
            --border-color: #1F2937;
            --primary: #00E6A0;
            --primary-rgb: 0, 230, 160;
            --secondary: #4C6FFF;
            --secondary-rgb: 76, 111, 255;
            --warning: #FFB800;
            --text-main: #E6EDF3;
            --text-sub: #8B98A9;
            --text-muted: #566173;
            --radius: 16px;
            --radius-sm: 10px;
            --shadow: 0 4px 24px rgba(0, 0, 0, .35);
            --shadow-hover: 0 8px 32px rgba(0, 0, 0, .5);
            --font-family: "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-family);
            background: var(--bg-dark);
            color: var(--text-main);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color .2s ease;
        }
        a:hover {
            color: #33ffbe;
        }
        img {
            max-width: 100%;
            height: auto;
        }
        .container {
            max-width: 1200px;
            padding-left: 16px;
            padding-right: 16px;
        }
        .section-pad {
            padding: 72px 0;
        }
        @media(max-width:767px) {
            .section-pad {
                padding: 48px 0;
            }
        }
        .text-sub {
            color: var(--text-sub);
        }
        .text-muted {
            color: var(--text-muted);
        }

        .btn-glow {
            background: linear-gradient(135deg, #00E6A0 0%, #4C6FFF 100%);
            color: #0B0F14;
            border: none;
            border-radius: var(--radius-sm);
            padding: 12px 28px;
            font-weight: 600;
            font-size: 16px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: all .25s ease;
            box-shadow: 0 4px 20px rgba(0, 230, 160, .15);
        }
        .btn-glow:hover {
            filter: brightness(1.15);
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(0, 230, 160, .25);
            color: #0B0F14;
        }
        .btn-glow:focus {
            outline: none;
            box-shadow: 0 0 0 3px rgba(0, 230, 160, .35);
        }
        .btn-outline-neon {
            background: transparent;
            border: 1px solid var(--primary);
            color: var(--primary);
            border-radius: var(--radius-sm);
            padding: 12px 28px;
            font-weight: 600;
            font-size: 16px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: all .25s ease;
        }
        .btn-outline-neon:hover {
            background: rgba(0, 230, 160, .08);
            color: #33ffbe;
            border-color: #33ffbe;
            transform: translateY(-2px);
        }
        .btn-outline-neon:focus {
            outline: none;
            box-shadow: 0 0 0 3px rgba(0, 230, 160, .35);
        }

        .navbar {
            background: rgba(11, 15, 20, .85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            padding: 14px 0;
            border-bottom: 1px solid transparent;
            border-image: linear-gradient(90deg, rgba(0, 230, 160, .6), rgba(76, 111, 255, .6)) 1;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 999;
            transition: background .3s ease, box-shadow .3s ease;
        }
        .navbar.scrolled {
            background: rgba(11, 15, 20, .92);
            box-shadow: 0 4px 30px rgba(0, 0, 0, .5);
        }
        .navbar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 20px;
            font-weight: 700;
            color: var(--text-main);
            padding: 0;
            letter-spacing: .5px;
        }
        .navbar-brand:hover {
            color: var(--text-main);
        }
        .brand-grad {
            background: linear-gradient(135deg, #00E6A0, #4C6FFF);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            font-weight: 700;
        }
        .brand-sub {
            font-size: 11px;
            font-weight: 400;
            color: var(--text-sub);
            background: rgba(0, 230, 160, .08);
            padding: 2px 8px;
            border-radius: 6px;
            letter-spacing: .5px;
        }
        .navbar-nav {
            gap: 4px;
        }
        .nav-link {
            color: var(--text-sub) !important;
            font-size: 15px;
            font-weight: 500;
            padding: 8px 16px !important;
            border-radius: 8px;
            transition: color .2s ease, background .2s ease;
        }
        .nav-link:hover {
            color: var(--text-main) !important;
            background: rgba(255, 255, 255, .03);
        }
        .nav-link.active {
            color: var(--primary) !important;
            position: relative;
            text-shadow: 0 0 12px rgba(0, 230, 160, .4);
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 16px;
            right: 16px;
            height: 2px;
            border-radius: 2px;
            background: linear-gradient(90deg, #00E6A0, #4C6FFF);
            box-shadow: 0 2px 12px rgba(0, 230, 160, .6);
        }
        .navbar-cta {
            margin-left: 12px;
        }
        .navbar-toggler {
            border: none;
            background: transparent;
            padding: 8px;
            color: var(--text-main);
            font-size: 20px;
        }
        .navbar-toggler:focus {
            box-shadow: none;
            color: var(--primary);
        }
        @media(max-width:991px) {
            .navbar-collapse {
                background: var(--bg-dark);
                border-radius: 12px;
                padding: 20px;
                margin-top: 12px;
                border: 1px solid var(--border-color);
                box-shadow: 0 8px 30px rgba(0, 0, 0, .6);
            }
            .navbar-nav {
                flex-direction: column;
                gap: 8px;
            }
            .nav-link {
                font-size: 17px;
                padding: 12px 16px !important;
            }
            .nav-link.active::after {
                left: 16px;
                right: auto;
                width: 40px;
            }
            .navbar-cta {
                margin-left: 0;
                margin-top: 12px;
            }
        }

        .hero {
            position: relative;
            padding: 180px 0 120px;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            min-height: 640px;
            display: flex;
            align-items: center;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(11, 15, 20, .95) 0%, rgba(11, 15, 20, .82) 50%, rgba(11, 15, 20, .6) 100%);
        }
        .hero .container {
            position: relative;
            z-index: 2;
        }
        .hero h1 {
            font-size: 46px;
            font-weight: 800;
            line-height: 1.25;
            color: var(--text-main);
            margin-bottom: 16px;
            letter-spacing: 1px;
        }
        .hero h1 .highlight {
            background: linear-gradient(135deg, #00E6A0, #4C6FFF);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-sub {
            font-size: 18px;
            color: var(--text-sub);
            margin-bottom: 28px;
            max-width: 540px;
            line-height: 1.7;
        }
        .hero-points {
            list-style: none;
            padding: 0;
            margin: 0 0 32px;
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }
        .hero-points li {
            font-size: 15px;
            color: var(--text-main);
            display: flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, .04);
            border: 1px solid rgba(255, 255, 255, .06);
            padding: 6px 14px;
            border-radius: 30px;
        }
        .hero-points li::before {
            content: '✦';
            color: var(--primary);
            font-size: 13px;
        }
        .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }
        .hero-cover {
            position: relative;
            z-index: 2;
        }
        .hero-cover-img {
            width: 100%;
            border-radius: 20px;
            box-shadow: 0 12px 40px rgba(0, 0, 0, .5);
            border: 1px solid rgba(0, 230, 160, .2);
        }
        @media(max-width:991px) {
            .hero {
                padding: 140px 0 80px;
                min-height: auto;
            }
            .hero h1 {
                font-size: 36px;
            }
        }
        @media(max-width:767px) {
            .hero {
                padding: 110px 0 60px;
            }
            .hero h1 {
                font-size: 28px;
            }
            .hero-sub {
                font-size: 16px;
            }
            .hero-points {
                flex-direction: column;
                gap: 8px;
            }
            .hero-actions .btn-glow,
            .hero-actions .btn-outline-neon {
                width: 100%;
                justify-content: center;
            }
        }

        .section-title {
            font-size: 32px;
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.25;
            margin-bottom: 12px;
            letter-spacing: .5px;
        }
        .section-title .highlight {
            background: linear-gradient(135deg, #00E6A0, #4C6FFF);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--text-sub);
            margin-bottom: 40px;
            max-width: 660px;
            line-height: 1.7;
        }
        @media(max-width:767px) {
            .section-title {
                font-size: 26px;
            }
        }

        .feature-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            padding: 32px 24px;
            height: 100%;
            transition: all .25s ease;
            box-shadow: var(--shadow);
        }
        .feature-card:hover {
            border-color: rgba(0, 230, 160, .4);
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .feature-card.border-glow {
            border: 1px solid rgba(0, 230, 160, .5);
            box-shadow: 0 0 30px rgba(0, 230, 160, .08), var(--shadow);
        }
        .feature-card.border-glow:hover {
            box-shadow: 0 0 40px rgba(0, 230, 160, .15), var(--shadow-hover);
        }
        .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: 14px;
            background: linear-gradient(135deg, rgba(0, 230, 160, .15), rgba(76, 111, 255, .15));
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            font-size: 24px;
            color: var(--primary);
        }
        .feature-card h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 12px;
            line-height: 1.3;
        }
        .feature-card p {
            font-size: 15px;
            color: var(--text-sub);
            line-height: 1.7;
            margin-bottom: 16px;
        }
        .feature-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: gap .2s ease;
        }
        .feature-link:hover {
            gap: 8px;
            color: #33ffbe;
        }
        .feature-cover {
            border-radius: 12px;
            margin-bottom: 20px;
            width: 100%;
            height: 140px;
            object-fit: cover;
        }

        .stats-section {
            position: relative;
            background: var(--bg-deep);
            border-top: 2px solid transparent;
            border-image: linear-gradient(90deg, #00E6A0, #4C6FFF) 1;
        }
        .stats-section .stats-bg {
            position: absolute;
            inset: 0;
            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: 60px 60px;
        }
        .stats-section .container {
            position: relative;
            z-index: 2;
        }
        .stat-badge {
            background: var(--bg-card);
            border: 1px solid var(--primary);
            border-radius: 12px;
            padding: 28px 20px;
            text-align: center;
            transition: all .3s ease;
            height: 100%;
        }
        .stat-badge:hover {
            box-shadow: 0 0 30px rgba(0, 230, 160, .15);
            border-color: rgba(0, 230, 160, .6);
        }
        .stat-number {
            font-size: 30px;
            font-weight: 800;
            color: var(--primary);
            text-shadow: 0 0 20px rgba(0, 230, 160, .4);
            display: block;
            line-height: 1.2;
            margin-bottom: 6px;
        }
        .stat-label {
            font-size: 14px;
            color: var(--text-sub);
            font-weight: 400;
        }
        @media(max-width:767px) {
            .stat-number {
                font-size: 26px;
            }
            .stat-badge {
                padding: 20px 14px;
            }
        }

        .news-list-section {
            background: var(--bg-dark);
        }
        .news-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            padding: 20px 24px;
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 20px;
            transition: all .25s ease;
            border-left: 3px solid transparent;
        }
        .news-card:hover {
            border-color: rgba(0, 230, 160, .25);
            border-left-color: var(--primary);
            box-shadow: var(--shadow);
            transform: translateX(4px);
        }
        .news-date {
            text-align: center;
            min-width: 60px;
            padding-right: 18px;
            border-right: 1px solid var(--border-color);
        }
        .news-date .day {
            font-size: 30px;
            font-weight: 700;
            color: var(--primary);
            display: block;
            line-height: 1.1;
        }
        .news-date .month {
            font-size: 13px;
            color: var(--text-sub);
            margin-top: 2px;
        }
        .news-body {
            flex: 1;
            min-width: 0;
        }
        .news-body h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 6px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .news-body h3 a {
            color: var(--text-main);
        }
        .news-body h3 a:hover {
            color: var(--primary);
        }
        .news-body p {
            font-size: 14px;
            color: var(--text-sub);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin: 0 0 6px;
            line-height: 1.6;
        }
        .news-cat {
            font-size: 12px;
            color: var(--text-muted);
            background: rgba(255, 255, 255, .04);
            padding: 2px 10px;
            border-radius: 20px;
            display: inline-block;
        }
        .news-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            white-space: nowrap;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: gap .2s ease;
        }
        .news-link:hover {
            gap: 8px;
            color: #33ffbe;
        }
        .empty-news {
            text-align: center;
            padding: 48px 20px;
            color: var(--text-sub);
            border: 1px dashed var(--border-color);
            border-radius: var(--radius);
            background: rgba(255, 255, 255, .01);
        }
        @media(max-width:767px) {
            .news-card {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
                padding: 16px;
            }
            .news-date {
                border-right: none;
                border-bottom: 1px solid var(--border-color);
                padding: 0 0 8px;
                text-align: left;
                display: flex;
                align-items: center;
                gap: 8px;
                min-width: auto;
            }
            .news-date .day {
                font-size: 20px;
            }
            .news-body h3 {
                font-size: 16px;
                white-space: normal;
            }
            .news-link {
                align-self: flex-end;
            }
        }

        .lead-section {
            background: linear-gradient(135deg, rgba(0, 230, 160, .04), rgba(76, 111, 255, .04));
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }
        .lead-panel {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 20px;
            padding: 48px;
            box-shadow: var(--shadow);
        }
        .lead-panel h2 {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text-main);
        }
        .lead-panel .lead-desc {
            font-size: 15px;
            color: var(--text-sub);
            line-height: 1.7;
            margin-bottom: 8px;
        }
        .lead-points {
            list-style: none;
            padding: 0;
            margin-top: 20px;
        }
        .lead-points li {
            font-size: 14px;
            color: var(--text-sub);
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 8px;
        }
        .lead-points li::before {
            content: '✓';
            color: var(--primary);
            font-size: 14px;
            font-weight: 700;
        }
        .form-label {
            color: var(--text-main);
            font-weight: 500;
            font-size: 14px;
            margin-bottom: 6px;
        }
        .form-control {
            background: var(--bg-dark);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            color: var(--text-main);
            padding: 12px 16px;
            font-size: 15px;
            transition: border-color .2s ease, box-shadow .2s ease;
        }
        .form-control:focus {
            background: var(--bg-dark);
            border-color: var(--primary);
            color: var(--text-main);
            box-shadow: 0 0 0 3px rgba(0, 230, 160, .15);
            outline: none;
        }
        .form-control::placeholder {
            color: var(--text-muted);
        }
        .form-select {
            background-color: var(--bg-dark);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            color: var(--text-main);
            padding: 12px 16px;
            font-size: 15px;
        }
        .form-select:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(0, 230, 160, .15);
            color: var(--text-main);
        }
        .form-select option {
            background: var(--bg-dark);
            color: var(--text-main);
        }
        @media(max-width:767px) {
            .lead-panel {
                padding: 28px 20px;
                border-radius: 14px;
            }
            .lead-panel h2 {
                font-size: 22px;
            }
        }

        .privacy-section {
            background: var(--bg-dark);
            padding: 40px 0;
        }
        .privacy-box {
            background: rgba(255, 255, 255, .02);
            border-radius: 12px;
            padding: 24px 28px;
            display: flex;
            align-items: flex-start;
            gap: 16px;
        }
        .privacy-icon {
            font-size: 28px;
            color: var(--primary);
            flex-shrink: 0;
            line-height: 1;
            margin-top: 2px;
        }
        .privacy-box h3 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 6px;
        }
        .privacy-box p {
            font-size: 13px;
            color: var(--text-sub);
            line-height: 1.8;
            margin: 0;
        }
        @media(max-width:767px) {
            .privacy-box {
                flex-direction: column;
                padding: 20px;
            }
        }

        .faq-section {
            background: var(--bg-deep);
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            margin-bottom: 12px;
            overflow: hidden;
            transition: border-color .25s ease;
        }
        .faq-item:hover {
            border-color: rgba(0, 230, 160, .3);
        }
        .faq-button {
            background: transparent;
            border: none;
            width: 100%;
            text-align: left;
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 500;
            color: var(--text-main);
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            gap: 16px;
        }
        .faq-button:hover {
            color: var(--primary);
        }
        .faq-button .icon {
            color: var(--primary);
            font-size: 18px;
            transition: transform .25s ease;
            flex-shrink: 0;
        }
        .faq-button[aria-expanded="true"] .icon {
            transform: rotate(45deg);
        }
        .faq-body {
            padding: 0 24px 20px;
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.75;
        }

        .cta-section {
            position: relative;
            padding: 80px 0;
            background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(11, 15, 20, .96), rgba(11, 15, 20, .85));
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .cta-title {
            font-size: 36px;
            font-weight: 800;
            color: var(--text-main);
            line-height: 1.3;
            margin-bottom: 16px;
        }
        .cta-title .highlight {
            background: linear-gradient(135deg, #00E6A0, #4C6FFF);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .cta-desc {
            font-size: 17px;
            color: var(--text-sub);
            max-width: 560px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }
        @media(max-width:767px) {
            .cta-section {
                padding: 56px 0;
            }
            .cta-title {
                font-size: 26px;
            }
            .cta-desc {
                font-size: 15px;
            }
        }

        .site-footer {
            background: var(--bg-deep);
            padding: 56px 0 24px;
            border-top: 1px solid var(--border-color);
        }
        .footer-brand {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 12px;
            display: block;
        }
        .footer-brand .brand-grad {
            font-size: 22px;
        }
        .footer-desc {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.8;
            margin-bottom: 16px;
            max-width: 280px;
        }
        .footer-title {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 16px;
            text-transform: none;
            letter-spacing: 1px;
        }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            color: var(--text-sub);
            font-size: 14px;
            transition: color .2s ease, padding-left .2s ease;
        }
        .footer-links a:hover {
            color: var(--primary);
            padding-left: 4px;
        }
        .footer-contact {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-contact li {
            color: var(--text-sub);
            font-size: 14px;
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer-contact li .icon {
            color: var(--primary);
        }
        .footer-bottom {
            border-top: 1px solid var(--border-color);
            margin-top: 40px;
            padding-top: 20px;
            text-align: center;
        }
        .footer-bottom p {
            font-size: 13px;
            color: var(--text-muted);
            margin: 0;
        }
        @media(max-width:767px) {
            .site-footer {
                padding: 40px 0 20px;
            }
            .footer-col {
                margin-bottom: 28px;
            }
        }

        .back-to-top {
            position: fixed;
            bottom: 28px;
            right: 28px;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--bg-card);
            border: 1px solid rgba(0, 230, 160, .4);
            color: var(--primary);
            font-size: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 99;
            opacity: 0;
            visibility: hidden;
            transition: all .3s ease;
            cursor: pointer;
            box-shadow: 0 4px 16px rgba(0, 0, 0, .3);
        }
        .back-to-top.show {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background: var(--primary);
            color: var(--bg-dark);
            transform: translateY(-3px);
        }

        .divider-neon {
            height: 2px;
            background: linear-gradient(90deg, transparent, #00E6A0, #4C6FFF, transparent);
            border: none;
            margin: 0;
            opacity: 1;
        }

/* roulang page: category1 */
:root {
            --bg-dark: #0B0F14;
            --bg-card: #141B24;
            --border-dark: #1F2937;
            --primary: #00E6A0;
            --secondary: #4C6FFF;
            --warning-neon: #FFB800;
            --text-main: #E6EDF3;
            --text-sub: #8B98A9;
            --text-mute: #566173;
            --radius-card: 16px;
            --radius-btn: 10px;
            --shadow-card: 0 4px 24px rgba(0, 0, 0, .35);
            --shadow-hover: 0 8px 32px rgba(0, 0, 0, .5);
            --gradient-main: linear-gradient(135deg, #00E6A0 0%, #4C6FFF 100%);
            --font-sans: "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-dark);
            color: var(--text-main);
            line-height: 1.75;
            overflow-x: hidden;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color .25s ease;
        }

        a:hover {
            color: var(--secondary);
        }

        img {
            max-width: 100%;
            height: auto;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
        }

        .container {
            max-width: 1200px;
            padding-left: 16px;
            padding-right: 16px;
        }

        .btn {
            border-radius: var(--radius-btn);
            padding: 12px 28px;
            font-weight: 600;
            transition: all .25s ease;
            border: none;
        }

        .btn:focus {
            box-shadow: 0 0 0 3px rgba(0, 230, 160, .35);
            outline: none;
        }

        .btn-glow {
            background: var(--gradient-main);
            color: #0B0F14;
            font-weight: 700;
            border-radius: var(--radius-btn);
            padding: 12px 28px;
            display: inline-block;
            border: none;
            transition: all .25s ease;
            cursor: pointer;
            text-decoration: none;
        }

        .btn-glow:hover {
            filter: brightness(1.15);
            transform: translateY(-2px);
            color: #0B0F14;
            box-shadow: 0 4px 24px rgba(0, 230, 160, .3);
        }

        .btn-outline-neon {
            background: transparent;
            border: 1px solid var(--primary);
            color: var(--primary);
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            display: inline-block;
            font-weight: 600;
            transition: all .25s ease;
            text-decoration: none;
        }

        .btn-outline-neon:hover {
            background: rgba(0, 230, 160, .08);
            color: var(--primary);
            transform: translateY(-2px);
            box-shadow: 0 0 24px rgba(0, 230, 160, .2);
        }

        .btn-outline-ghost {
            background: transparent;
            border: 1px solid var(--border-dark);
            color: var(--text-sub);
            padding: 10px 24px;
            border-radius: var(--radius-btn);
            display: inline-block;
            font-weight: 500;
            transition: all .25s ease;
            text-decoration: none;
        }

        .btn-outline-ghost:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(0, 230, 160, .05);
        }

        .section {
            padding: 80px 0;
            position: relative;
        }

        .section-rule {
            border-top: 1px solid var(--border-dark);
        }

        /* Navbar */
        .navbar {
            background: rgba(11, 15, 20, .92);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            padding: 14px 0;
            border-bottom: 1px solid transparent;
            background-image: linear-gradient(135deg, rgba(0, 230, 160, .08), rgba(76, 111, 255, .08));
            background-clip: padding-box;
            border-bottom: 1px solid rgba(0, 230, 160, .2);
            transition: all .3s ease;
        }

        .navbar.scrolled {
            background: rgba(11, 15, 20, .96);
        }

        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 700;
        }

        .brand-grad {
            background: var(--gradient-main);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            color: transparent;
            font-weight: 800;
        }

        .brand-sub {
            font-size: 12px;
            color: var(--text-sub);
            font-weight: 400;
            letter-spacing: 1px;
            padding-left: 10px;
            border-left: 1px solid var(--border-dark);
            line-height: 1.2;
        }

        .navbar-toggler {
            background: transparent;
            border: 1px solid var(--border-dark);
            border-radius: 8px;
            color: var(--text-main);
            padding: 6px 12px;
            font-size: 20px;
            line-height: 1;
        }

        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(0, 230, 160, .25);
            outline: none;
        }

        .navbar-nav .nav-link {
            color: var(--text-sub);
            font-size: 15px;
            font-weight: 500;
            padding: 8px 18px;
            border-radius: 8px;
            position: relative;
            transition: color .25s ease;
        }

        .navbar-nav .nav-link:hover {
            color: var(--text-main);
        }

        .navbar-nav .nav-link.active {
            color: var(--primary);
            text-shadow: 0 0 12px rgba(0, 230, 160, .3);
        }

        .navbar-nav .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 18px;
            right: 18px;
            height: 2px;
            background: var(--gradient-main);
            border-radius: 2px;
            box-shadow: 0 2px 12px rgba(0, 230, 160, .6);
        }

        .navbar-cta {
            margin-left: 16px;
        }

        /* Hero */
        .category-hero {
            position: relative;
            padding: 120px 0 80px;
            background-image: linear-gradient(180deg, rgba(11, 15, 20, .7), rgba(11, 15, 20, .92)), url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-attachment: fixed;
            border-bottom: 1px solid var(--border-dark);
        }

        .category-hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: var(--gradient-main);
            opacity: .5;
        }

        .category-hero .hero-inner {
            max-width: 780px;
        }

        .category-hero .badge-tag {
            display: inline-block;
            background: rgba(0, 230, 160, .15);
            border: 1px solid rgba(0, 230, 160, .3);
            color: var(--primary);
            padding: 4px 16px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 1px;
            margin-bottom: 24px;
        }

        .category-hero h1 {
            font-size: 42px;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 20px;
            background: var(--gradient-main);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            color: transparent;
            display: inline-block;
            text-shadow: none;
        }

        .category-hero p.lead-text {
            font-size: 18px;
            color: var(--text-main);
            line-height: 1.75;
            max-width: 640px;
            margin-bottom: 16px;
        }

        .category-hero .hero-points {
            margin: 20px 0 30px;
            padding: 0;
            list-style: none;
        }

        .category-hero .hero-points li {
            font-size: 15px;
            color: var(--text-sub);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .category-hero .hero-points li::before {
            content: '✦';
            color: var(--primary);
            font-size: 14px;
            flex-shrink: 0;
        }

        /* 内容主体 */
        .content-main {
            padding: 80px 0;
        }

        .content-left {
            padding-right: 40px;
        }

        .content-right {
            position: sticky;
            top: 100px;
            align-self: start;
        }

        .content-right .side-card {
            background: var(--bg-card);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-card);
            padding: 24px;
            margin-bottom: 24px;
            box-shadow: var(--shadow-card);
        }

        .content-right .side-card img {
            border-radius: 12px;
            width: 100%;
            height: 220px;
            object-fit: cover;
            margin-bottom: 14px;
        }

        .content-right .side-card h4 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-main);
        }

        .content-right .side-card p {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.7;
            margin-bottom: 0;
        }

        .content-block h2 {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 20px;
            color: var(--text-main);
            position: relative;
            padding-bottom: 14px;
        }

        .content-block h2::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 48px;
            height: 2px;
            background: var(--gradient-main);
            border-radius: 2px;
            box-shadow: 0 0 12px rgba(0, 230, 160, .5);
        }

        .content-block p {
            color: var(--text-sub);
            line-height: 1.9;
            margin-bottom: 16px;
            font-size: 16px;
        }

        .content-block ul.feature-list {
            list-style: none;
            padding: 16px 0;
            margin: 0 0 16px;
        }

        .content-block ul.feature-list li {
            position: relative;
            padding-left: 28px;
            margin-bottom: 12px;
            color: var(--text-main);
            font-size: 16px;
        }

        .content-block ul.feature-list li::before {
            content: '▶';
            position: absolute;
            left: 0;
            top: 0;
            color: var(--primary);
            font-size: 12px;
        }

        /* 数据徽章 */
        .data-badges {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin: 32px 0;
        }

        .data-badge {
            background: rgba(11, 15, 20, .6);
            border: 1px solid rgba(0, 230, 160, .4);
            border-radius: 12px;
            padding: 20px 28px;
            text-align: center;
            min-width: 140px;
            transition: all .3s ease;
            box-shadow: var(--shadow-card);
        }

        .data-badge .data-num {
            font-size: 28px;
            font-weight: 800;
            color: var(--primary);
            text-shadow: 0 0 18px rgba(0, 230, 160, .4);
            line-height: 1.2;
            display: block;
            margin-bottom: 4px;
        }

        .data-badge .data-label {
            font-size: 14px;
            color: var(--text-sub);
        }

        .data-badge:hover {
            border-color: rgba(0, 230, 160, .8);
            box-shadow: 0 0 32px rgba(0, 230, 160, .15);
        }

        /* 场景卡片 */
        .scene-cards {
            margin: 40px 0;
        }

        .scene-cards .scene-item {
            background: var(--bg-card);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-card);
            padding: 32px;
            height: 100%;
            transition: border-color .25s ease, transform .25s ease, box-shadow .25s ease;
        }

        .scene-cards .scene-item:hover {
            border-color: rgba(0, 230, 160, .4);
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

        .scene-cards .scene-item .scene-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: var(--gradient-main);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: 16px;
            color: #0B0F14;
        }

        .scene-cards .scene-item h5 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .scene-cards .scene-item p {
            color: var(--text-sub);
            font-size: 14px;
            margin-bottom: 0;
            line-height: 1.7;
        }

        /* 流程步骤 */
        .steps-wrapper {
            margin: 32px 0;
            counter-reset: step;
        }

        .step-item {
            display: flex;
            gap: 20px;
            padding: 20px 0;
            border-bottom: 1px solid rgba(31, 41, 55, .6);
            counter-increment: step;
        }

        .step-item:last-child {
            border-bottom: none;
        }

        .step-item .step-num {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--gradient-main);
            color: #0B0F14;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            font-size: 15px;
        }

        .step-item .step-body h5 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 6px;
        }

        .step-item .step-body p {
            color: var(--text-sub);
            font-size: 14px;
            margin-bottom: 0;
        }

        /* FAQ */
        .faq-section {
            background: var(--bg-card);
            border-top: 1px solid var(--border-dark);
            border-bottom: 1px solid var(--border-dark);
            padding: 80px 0;
        }

        .faq-item {
            background: transparent;
            border: 1px solid var(--border-dark);
            border-radius: 12px;
            margin-bottom: 16px;
            overflow: hidden;
            transition: border-color .25s ease;
        }

        .faq-item:hover {
            border-color: rgba(0, 230, 160, .3);
        }

        .faq-item .accordion-button {
            background: transparent;
            color: var(--text-main);
            font-size: 16px;
            font-weight: 600;
            padding: 18px 24px;
            box-shadow: none;
            border: none;
        }

        .faq-item .accordion-button:not(.collapsed) {
            color: var(--primary);
            background: rgba(0, 230, 160, .04);
        }

        .faq-item .accordion-button:focus {
            box-shadow: none;
            border-color: rgba(0, 230, 160, .3);
        }

        .faq-item .accordion-button::after {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%2300E6A0'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");
        }

        .faq-item .accordion-body {
            color: var(--text-sub);
            font-size: 14px;
            padding: 0 24px 20px;
            line-height: 1.8;
            border-top: none;
        }

        /* CTA */
        .cta-section {
            padding: 80px 0;
            position: relative;
            overflow: hidden;
            background-image: linear-gradient(135deg, rgba(0, 230, 160, .05), rgba(76, 111, 255, .05));
        }

        .cta-section .cta-heading {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .cta-section p {
            color: var(--text-sub);
            margin-bottom: 28px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

        .cta-buttons {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* 页脚 */
        .site-footer {
            background: #0B0F14;
            border-top: 1px solid var(--border-dark);
            padding: 60px 0 20px;
        }

        .footer-brand {
            font-size: 24px;
            font-weight: 800;
            margin-bottom: 16px;
            display: block;
        }

        .footer-desc {
            color: var(--text-sub);
            font-size: 14px;
            line-height: 1.8;
            max-width: 280px;
        }

        .footer-title {
            color: var(--text-main);
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 20px;
            position: relative;
            padding-bottom: 10px;
        }

        .footer-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 32px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }

        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-links li {
            margin-bottom: 10px;
        }

        .footer-links a {
            color: var(--text-sub);
            font-size: 14px;
            transition: color .25s ease;
        }

        .footer-links a:hover {
            color: var(--primary);
        }

        .footer-contact {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-contact li {
            color: var(--text-sub);
            font-size: 14px;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .footer-contact .icon {
            color: var(--primary);
            flex-shrink: 0;
        }

        .footer-bottom {
            border-top: 1px solid rgba(31, 41, 55, .6);
            padding-top: 20px;
            margin-top: 40px;
            text-align: center;
        }

        .footer-bottom p {
            color: var(--text-mute);
            font-size: 14px;
            margin-bottom: 0;
        }

        /* 返回顶部 */
        .back-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: var(--bg-card);
            border: 1px solid var(--border-dark);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            z-index: 1000;
            cursor: pointer;
            transition: all .3s ease;
            box-shadow: var(--shadow-card);
            text-decoration: none;
        }

        .back-top:hover {
            border-color: var(--primary);
            transform: translateY(-4px);
            box-shadow: 0 8px 32px rgba(0, 230, 160, .2);
        }

        /* 响应式断点 */
        @media (max-width: 991.98px) {
            .content-left {
                padding-right: 0;
            }

            .content-right {
                position: static;
                margin-top: 40px;
            }

            .navbar-collapse {
                background: rgba(11, 15, 20, .98);
                padding: 20px;
                border-radius: 12px;
                margin-top: 12px;
                border: 1px solid var(--border-dark);
            }

            .navbar-nav .nav-link {
                padding: 12px 16px;
                font-size: 16px;
            }

            .navbar-nav .nav-link.active::after {
                display: block;
                left: 16px;
                right: auto;
                width: 24px;
            }

            .navbar-cta {
                margin-left: 0;
                margin-top: 16px;
            }
        }

        @media (max-width: 767.98px) {
            .section {
                padding: 60px 0;
            }

            .category-hero {
                padding: 80px 0 60px;
            }

            .category-hero h1 {
                font-size: 32px;
            }

            .category-hero p.lead-text {
                font-size: 16px;
            }

            .content-main {
                padding: 60px 0;
            }

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

            .data-badges {
                gap: 12px;
            }

            .data-badge {
                padding: 16px 20px;
                min-width: calc(50% - 12px);
            }

            .data-badge .data-num {
                font-size: 24px;
            }

            .scene-cards .scene-item {
                margin-bottom: 16px;
            }

            .cta-section .cta-heading {
                font-size: 22px;
            }

            .btn-glow,
            .btn-outline-neon,
            .btn-outline-ghost {
                padding: 10px 20px;
                font-size: 14px;
            }

            .brand-sub {
                display: none;
            }

            .navbar-brand {
                font-size: 18px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding-left: 12px;
                padding-right: 12px;
            }

            .category-hero h1 {
                font-size: 28px;
            }

            .data-badge {
                min-width: 100%;
            }

            .step-item {
                gap: 14px;
            }

            .back-top {
                right: 16px;
                bottom: 16px;
                width: 40px;
                height: 40px;
            }
        }

        @media (min-width: 992px) {
            .navbar-nav .nav-link {
                position: relative;
            }
        }

/* roulang page: article */
:root {
            --bg-dark: #0B0F14;
            --bg-card: #141B24;
            --border-card: #1F2937;
            --primary: #00E6A0;
            --secondary: #4C6FFF;
            --warning: #FFB800;
            --text-main: #E6EDF3;
            --text-sub: #8B98A9;
            --text-muted: #566173;
            --radius-lg: 16px;
            --radius-md: 10px;
            --shadow-card: 0 4px 24px rgba(0, 0, 0, .35);
            --shadow-hover: 0 8px 32px rgba(0, 0, 0, .5);
            --font-family: "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
            --gradient-brand: linear-gradient(135deg, #00E6A0 0%, #4C6FFF 100%);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family);
            background-color: var(--bg-dark);
            color: var(--text-main);
            font-size: 16px;
            line-height: 1.75;
            padding-top: 72px;
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color .25s;
        }

        a:hover {
            color: var(--secondary);
        }

        img {
            max-width: 100%;
            height: auto;
        }

        .container {
            max-width: 1200px;
            padding-left: 16px;
            padding-right: 16px;
        }

        @media (max-width: 767px) {
            .container {
                padding-left: 12px;
                padding-right: 12px;
            }
        }

        a:focus-visible,
        button:focus-visible,
        .btn-glow:focus-visible,
        .btn-outline:focus-visible {
            outline: none;
            box-shadow: 0 0 0 3px rgba(0, 230, 160, .35);
        }

        /* ===== 导航 ===== */
        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(11, 15, 20, .85);
            border-bottom: 1px solid rgba(0, 230, 160, .25);
            padding: 12px 0;
            transition: background .3s, box-shadow .3s, border-color .3s;
            backdrop-filter: blur(6px);
            -webkit-backdrop-filter: blur(6px);
        }

        .navbar.scrolled {
            background: rgba(11, 15, 20, .92);
            box-shadow: 0 4px 30px rgba(0, 0, 0, .45);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
        }

        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: var(--text-main);
            white-space: nowrap;
        }

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

        .brand-grad {
            background: var(--gradient-brand);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            font-weight: 800;
            letter-spacing: .5px;
        }

        .brand-sub {
            font-size: 12px;
            color: var(--text-sub);
            border-left: 1px solid var(--border-card);
            padding-left: 10px;
            line-height: 1.4;
        }

        .navbar-toggler {
            border: 1px solid var(--border-card);
            background: var(--bg-card);
            color: var(--text-main);
            font-size: 20px;
            line-height: 1;
            padding: 6px 12px;
            border-radius: 8px;
        }

        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(0, 230, 160, .3);
        }

        .navbar-nav {
            gap: 4px;
        }

        .navbar-nav .nav-link {
            color: var(--text-main);
            font-size: 15px;
            padding: 8px 16px;
            position: relative;
            border-radius: 6px;
            transition: color .25s, background .25s;
        }

        .navbar-nav .nav-link:hover {
            color: var(--primary);
            background: rgba(0, 230, 160, .06);
        }

        .navbar-nav .nav-link.active {
            color: var(--primary);
            font-weight: 600;
        }

        .navbar-nav .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 16px;
            right: 16px;
            height: 2px;
            background: var(--gradient-brand);
            border-radius: 2px;
            box-shadow: 0 2px 12px rgba(0, 230, 160, .6);
        }

        .navbar-cta {
            margin-left: 8px;
        }

        .btn-glow {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--gradient-brand);
            color: #0B0F14;
            font-weight: 700;
            font-size: 14px;
            border-radius: 10px;
            padding: 12px 28px;
            border: none;
            transition: all .25s;
            box-shadow: 0 0 20px rgba(0, 230, 160, .25);
            cursor: pointer;
            white-space: nowrap;
        }

        .btn-glow:hover {
            filter: brightness(1.15);
            transform: translateY(-2px);
            color: #0B0F14;
            box-shadow: 0 0 32px rgba(0, 230, 160, .45);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: transparent;
            color: var(--primary);
            border: 1px solid var(--primary);
            border-radius: 10px;
            padding: 12px 28px;
            font-weight: 600;
            font-size: 15px;
            transition: all .25s;
            cursor: pointer;
        }

        .btn-outline:hover {
            background: rgba(0, 230, 160, .08);
            color: var(--primary);
            transform: translateY(-2px);
            box-shadow: 0 0 20px rgba(0, 230, 160, .2);
        }

        @media (max-width: 991px) {
            .navbar-collapse {
                background: rgba(11, 15, 20, .98);
                border: 1px solid var(--border-card);
                border-radius: 12px;
                padding: 16px;
                margin-top: 12px;
            }

            .navbar-nav {
                gap: 0;
            }

            .navbar-nav .nav-link {
                padding: 12px 16px;
                font-size: 16px;
            }

            .navbar-nav .nav-link.active::after {
                left: 16px;
                right: auto;
                width: 24px;
            }

            .navbar-cta {
                margin-left: 0;
                margin-top: 12px;
                padding-top: 12px;
                border-top: 1px solid var(--border-card);
            }
        }

        /* ===== 文章头部 ===== */
        .article-header {
            position: relative;
            padding: 130px 0 56px;
            background: linear-gradient(rgba(11, 15, 20, .72), rgba(11, 15, 20, .94)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            border-bottom: 1px solid rgba(0, 230, 160, .2);
            text-align: center;
        }

        .article-breadcrumb {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 6px;
            font-size: 13px;
            color: var(--text-sub);
            margin-bottom: 20px;
        }

        .article-breadcrumb a {
            color: var(--text-sub);
            transition: color .25s;
        }

        .article-breadcrumb a:hover {
            color: var(--primary);
        }

        .article-breadcrumb .crumb-current {
            color: var(--text-muted);
            display: inline-block;
            max-width: 220px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
            vertical-align: bottom;
        }

        .article-header h1 {
            font-size: 32px;
            font-weight: 800;
            line-height: 1.3;
            max-width: 780px;
            margin: 0 auto 20px;
            letter-spacing: .5px;
        }

        .article-meta {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 24px;
            font-size: 14px;
            color: var(--text-sub);
        }

        .meta-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .meta-item .icon {
            font-size: 15px;
        }

        @media (max-width: 767px) {
            .article-header {
                padding: 110px 0 40px;
            }

            .article-header h1 {
                font-size: 24px;
            }

            .article-meta {
                gap: 12px 20px;
                font-size: 13px;
            }
        }

        /* ===== 正文区 ===== */
        .article-main {
            max-width: 780px;
            margin: 0 auto;
            padding: 56px 16px 24px;
        }

        .article-content {
            font-size: 16px;
            line-height: 1.9;
            color: var(--text-main);
        }

        .article-content p {
            margin-bottom: 1.2em;
        }

        .article-content h2,
        .article-content h3 {
            margin-top: 1.6em;
            margin-bottom: .8em;
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.4;
        }

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

        .article-content h3 {
            font-size: 20px;
        }

        .article-content img {
            width: 100%;
            border-radius: 12px;
            object-fit: cover;
            margin: 20px 0;
        }

        .article-content blockquote {
            border-left: 4px solid var(--primary);
            background: rgba(0, 230, 160, .05);
            border-radius: 0 8px 8px 0;
            padding: 14px 20px;
            margin: 20px 0;
            color: var(--text-sub);
            font-size: 15px;
        }

        .article-content table {
            width: 100%;
            background: var(--bg-card);
            border-radius: 12px;
            border-collapse: collapse;
            margin: 20px 0;
            overflow: hidden;
        }

        .article-content th,
        .article-content td {
            padding: 12px 16px;
            border-bottom: 1px solid var(--border-card);
            font-size: 14px;
        }

        .article-content th {
            background: rgba(0, 230, 160, .08);
            color: var(--primary);
            font-weight: 600;
        }

        .article-content pre {
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: 12px;
            padding: 16px;
            overflow-x: auto;
            font-size: 14px;
            line-height: 1.6;
            color: var(--text-main);
        }

        .article-content code {
            background: var(--bg-card);
            border-radius: 4px;
            padding: 2px 6px;
            font-size: 14px;
            color: var(--primary);
        }

        .article-content a {
            text-decoration: underline;
            text-underline-offset: 3px;
        }

        .article-content ul,
        .article-content ol {
            margin: 0 0 1.2em 1.2em;
            padding: 0;
        }

        .article-content li {
            margin-bottom: .4em;
        }

        /* 空状态 */
        .article-empty {
            text-align: center;
            padding: 80px 20px;
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-lg);
        }

        .article-empty .empty-icon {
            font-size: 52px;
            display: block;
            margin-bottom: 16px;
        }

        .article-empty h3 {
            font-size: 22px;
            margin-bottom: 8px;
        }

        .article-empty p {
            color: var(--text-sub);
            margin-bottom: 24px;
        }

        /* 标签 */
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid var(--border-card);
        }

        .tag {
            display: inline-flex;
            align-items: center;
            font-size: 13px;
            color: var(--primary);
            background: rgba(0, 230, 160, .06);
            border: 1px solid rgba(0, 230, 160, .3);
            border-radius: 999px;
            padding: 6px 16px;
            transition: all .25s;
        }

        .tag:hover {
            background: rgba(0, 230, 160, .15);
            border-color: var(--primary);
        }

        /* 上一篇/下一篇 */
        .article-pager {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
            margin-top: 24px;
        }

        .pager-card {
            display: block;
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-lg);
            padding: 20px 24px;
            transition: all .25s;
            color: var(--text-main);
        }

        .pager-card:hover {
            border-color: rgba(0, 230, 160, .4);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
            color: var(--primary);
        }

        .pager-card .pager-label {
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 4px;
        }

        .pager-card .pager-title {
            font-size: 15px;
            font-weight: 600;
        }

        @media (max-width: 767px) {
            .article-main {
                padding: 40px 12px 20px;
            }

            .article-content {
                font-size: 15px;
            }

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

        /* ===== 相关推荐 ===== */
        .related-section {
            padding: 56px 0 64px;
            border-top: 1px solid rgba(0, 230, 160, .15);
        }

        .related-section .section-title {
            font-size: 28px;
            font-weight: 700;
            text-align: center;
            margin-bottom: 12px;
            letter-spacing: .5px;
        }

        .related-section .section-sub {
            text-align: center;
            color: var(--text-sub);
            font-size: 14px;
            margin-bottom: 40px;
        }

        .related-card {
            display: block;
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all .25s;
            height: 100%;
            color: var(--text-main);
        }

        .related-card:hover {
            border-color: rgba(0, 230, 160, .4);
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            color: var(--text-main);
        }

        .related-card img {
            width: 100%;
            height: 150px;
            object-fit: cover;
            border-radius: 0;
            display: block;
        }

        .related-card-body {
            padding: 18px;
        }

        .related-card h3 {
            font-size: 16px;
            font-weight: 600;
            line-height: 1.5;
            margin-bottom: 8px;
        }

        .related-card .related-time {
            font-size: 13px;
            color: var(--text-sub);
        }

        .related-card .arrow {
            color: var(--primary);
            font-size: 14px;
            margin-left: 4px;
            transition: margin-left .25s;
        }

        .related-card:hover .arrow {
            margin-left: 8px;
        }

        @media (max-width: 767px) {
            .related-section .section-title {
                font-size: 24px;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 72px 0;
            text-align: center;
            background: radial-gradient(ellipse at 50% 120%, rgba(0, 230, 160, .1), rgba(11, 15, 20, 0) 70%);
            border-top: 1px solid var(--border-card);
        }

        .cta-section h2 {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 12px;
            letter-spacing: .5px;
        }

        .cta-section p {
            color: var(--text-sub);
            font-size: 16px;
            margin-bottom: 28px;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }

        .cta-section .btn-glow {
            font-size: 16px;
            padding: 14px 36px;
        }

        @media (max-width: 767px) {
            .cta-section {
                padding: 56px 0;
            }

            .cta-section h2 {
                font-size: 24px;
            }
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 56px 0 72px;
            border-top: 1px solid var(--border-card);
        }

        .faq-section .section-title {
            font-size: 28px;
            font-weight: 700;
            text-align: center;
            margin-bottom: 40px;
        }

        .faq-wrap {
            max-width: 780px;
            margin: 0 auto;
        }

        .accordion-item {
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-lg);
            margin-bottom: 14px;
            overflow: hidden;
            transition: border-color .25s;
        }

        .accordion-item:hover {
            border-color: rgba(0, 230, 160, .3);
        }

        .accordion-button {
            background: transparent;
            color: var(--text-main);
            font-size: 16px;
            font-weight: 600;
            padding: 18px 24px;
            border: none;
            transition: color .25s, background .25s;
        }

        .accordion-button:not(.collapsed) {
            background: rgba(0, 230, 160, .06);
            color: var(--primary);
            box-shadow: none;
        }

        .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(0, 230, 160, .3);
            border: none;
        }

        .accordion-button::after {
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%2300E6A0'%3E%3Cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3E%3C/svg%3E");
            transition: transform .25s;
        }

        .accordion-body {
            padding: 0 24px 22px;
            color: var(--text-sub);
            font-size: 14px;
            line-height: 1.75;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-card);
            border-top: 1px solid rgba(0, 230, 160, .2);
            padding: 56px 0 0;
        }

        .footer-brand {
            font-size: 22px;
            font-weight: 700;
            line-height: 1.4;
        }

        .footer-desc {
            color: var(--text-sub);
            font-size: 14px;
            margin-top: 12px;
            max-width: 340px;
            line-height: 1.8;
        }

        .footer-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 16px;
        }

        .footer-links,
        .footer-contact {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-links li,
        .footer-contact li {
            margin-bottom: 10px;
            font-size: 14px;
        }

        .footer-links a {
            color: var(--text-sub);
            transition: color .25s, padding-left .25s;
        }

        .footer-links a:hover {
            color: var(--primary);
            padding-left: 4px;
        }

        .footer-contact {
            color: var(--text-sub);
        }

        .footer-contact .icon {
            margin-right: 8px;
            font-style: normal;
        }

        .footer-bottom {
            border-top: 1px solid var(--border-card);
            padding: 20px 0;
            margin-top: 40px;
            text-align: center;
        }

        .footer-bottom p {
            margin: 0;
            color: var(--text-muted);
            font-size: 13px;
        }

        @media (max-width: 767px) {
            .site-footer {
                padding: 44px 0 0;
            }

            .footer-col {
                margin-bottom: 24px;
            }
        }

        /* ===== 返回顶部 ===== */
        .back-top {
            position: fixed;
            bottom: 32px;
            right: 32px;
            z-index: 999;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--bg-card);
            border: 1px solid rgba(0, 230, 160, .4);
            color: var(--primary);
            font-size: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            opacity: 0;
            visibility: hidden;
            transform: translateY(10px);
            transition: all .3s;
            box-shadow: 0 4px 16px rgba(0, 0, 0, .4);
        }

        .back-top.show {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .back-top:hover {
            background: var(--primary);
            color: #0B0F14;
            box-shadow: 0 0 24px rgba(0, 230, 160, .5);
        }

        @media (max-width: 767px) {
            .back-top {
                bottom: 20px;
                right: 20px;
                width: 38px;
                height: 38px;
                font-size: 16px;
            }
        }

/* roulang page: category2 */
:root {
            --bg-dark: #0B0F14;
            --bg-card: #141B24;
            --border-color: #1F2937;
            --primary: #00E6A0;
            --secondary: #4C6FFF;
            --warning: #FFB800;
            --text-main: #E6EDF3;
            --text-sub: #8B98A9;
            --text-placeholder: #566173;
            --radius: 16px;
            --shadow: 0 4px 24px rgba(0, 0, 0, .35);
            --shadow-hover: 0 8px 32px rgba(0, 0, 0, .5);
            --gradient: linear-gradient(135deg, #00E6A0 0%, #4C6FFF 100%);
            --font-family: "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            margin: 0;
            font-family: var(--font-family);
            background: var(--bg-dark);
            color: var(--text-main);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color .2s ease;
        }
        a:hover {
            color: var(--primary);
            text-decoration: none;
        }
        img {
            max-width: 100%;
            height: auto;
        }
        .container {
            max-width: 1200px;
            padding-left: 16px;
            padding-right: 16px;
        }
        @media (max-width: 767px) {
            .container {
                padding-left: 12px;
                padding-right: 12px;
            }
        }

        /* ========== 导航 ========== */
        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(11, 15, 20, .85);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border-bottom: 1px solid transparent;
            padding: 12px 0;
            transition: background .3s ease, box-shadow .3s ease;
        }
        .navbar.scrolled {
            background: rgba(11, 15, 20, .92);
            box-shadow: 0 4px 30px rgba(0, 0, 0, .4);
        }
        .navbar::after {
            content: '';
            position: absolute;
            left: 0;
            right: 0;
            bottom: -1px;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--primary), var(--secondary), transparent);
        }
        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 800;
        }
        .brand-grad {
            background: var(--gradient);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            font-size: 22px;
            letter-spacing: .5px;
            white-space: nowrap;
        }
        .brand-sub {
            font-size: 12px;
            color: var(--text-sub);
            border: 1px solid rgba(0, 230, 160, .4);
            border-radius: 20px;
            padding: 2px 10px;
            white-space: nowrap;
        }
        .navbar-nav {
            gap: 4px;
        }
        .nav-link {
            color: var(--text-sub) !important;
            font-size: 15px;
            font-weight: 500;
            padding: 8px 16px !important;
            border-radius: 8px;
            position: relative;
            transition: color .2s ease, background .2s ease;
        }
        .nav-link:hover {
            color: var(--text-main) !important;
            background: rgba(255, 255, 255, .04);
        }
        .nav-link.active {
            color: var(--primary) !important;
            text-shadow: 0 0 12px rgba(0, 230, 160, .6);
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            left: 16px;
            right: 16px;
            bottom: 0;
            height: 2px;
            background: var(--gradient);
            border-radius: 2px;
            box-shadow: 0 2px 12px rgba(0, 230, 160, .6);
        }
        .navbar-cta .btn-glow {
            display: inline-block;
            background: var(--gradient);
            color: #0B0F14;
            font-weight: 700;
            border: 0;
            border-radius: 10px;
            padding: 8px 20px;
            font-size: 14px;
            text-decoration: none;
            transition: filter .25s, transform .25s, box-shadow .25s;
        }
        .navbar-cta .btn-glow:hover {
            filter: brightness(1.15);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 230, 160, .35);
            color: #0B0F14;
        }
        .navbar-toggler {
            border: 1px solid var(--border-color);
            color: var(--text-main);
            font-size: 20px;
            padding: 4px 10px;
            border-radius: 8px;
            background: transparent;
            line-height: 1;
        }
        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(0, 230, 160, .35);
            outline: none;
        }
        @media (max-width: 991px) {
            .navbar-collapse {
                background: rgba(11, 15, 20, .98);
                border-radius: 0 0 16px 16px;
                padding: 16px;
                border-top: 1px solid var(--border-color);
                margin-top: 12px;
            }
            .navbar-nav {
                gap: 0;
            }
            .nav-link {
                padding: 12px 16px !important;
                font-size: 16px;
            }
            .navbar-cta {
                padding: 12px 0 4px;
                text-align: center;
            }
        }

        /* ========== Hero ========== */
        .page-hero {
            position: relative;
            padding: 150px 0 80px;
            background: linear-gradient(rgba(11, 15, 20, .72), rgba(11, 15, 20, .88)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            text-align: center;
            border-bottom: 1px solid rgba(255, 255, 255, .06);
        }
        .page-hero h1 {
            font-size: 42px;
            font-weight: 800;
            letter-spacing: 1px;
            color: var(--text-main);
            display: inline-block;
            position: relative;
            padding-bottom: 16px;
            margin-bottom: 0;
        }
        .page-hero h1 .hero-underline {
            position: absolute;
            left: 10%;
            right: 10%;
            bottom: 0;
            height: 3px;
            background: var(--gradient);
            border-radius: 3px;
            box-shadow: 0 0 16px rgba(0, 230, 160, .6);
        }
        .page-hero .hero-lead {
            margin-top: 22px;
            font-size: 18px;
            color: var(--text-sub);
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }
        .page-hero .breadcrumb-line {
            margin-top: 20px;
            font-size: 14px;
            color: var(--text-placeholder);
        }
        .page-hero .breadcrumb-line a {
            color: var(--text-sub);
        }
        .page-hero .breadcrumb-line a:hover {
            color: var(--primary);
        }
        @media (max-width: 767px) {
            .page-hero {
                padding: 120px 0 50px;
            }
            .page-hero h1 {
                font-size: 30px;
            }
            .page-hero .hero-lead {
                font-size: 16px;
            }
        }

        /* ========== 内容区 ========== */
        .page-main {
            padding: 60px 0 40px;
        }
        .section-block {
            margin-bottom: 44px;
        }
        .section-title {
            font-size: 26px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 16px;
            line-height: 1.3;
            position: relative;
        }
        .section-title::before {
            content: '';
            display: inline-block;
            width: 6px;
            height: 22px;
            background: var(--gradient);
            border-radius: 3px;
            margin-right: 12px;
            vertical-align: -3px;
        }
        .section-desc {
            font-size: 16px;
            color: var(--text-sub);
            line-height: 1.9;
            margin-bottom: 12px;
        }

        /* 步骤 */
        .step-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
            margin-top: 8px;
        }
        .step-item {
            display: flex;
            gap: 16px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 18px 20px;
            transition: border-color .25s, box-shadow .25s, transform .25s;
        }
        .step-item:hover {
            border-color: rgba(0, 230, 160, .4);
            box-shadow: var(--shadow);
            transform: translateY(-2px);
        }
        .step-num {
            flex-shrink: 0;
            font-size: 22px;
            font-weight: 800;
            background: var(--gradient);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            line-height: 1.4;
            min-width: 44px;
            text-align: center;
        }
        .step-item h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 4px;
        }
        .step-item p {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* 列表 */
        .feature-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .feature-list li {
            position: relative;
            padding-left: 26px;
            font-size: 15px;
            color: var(--text-sub);
            line-height: 1.75;
            margin-bottom: 12px;
        }
        .feature-list li::before {
            content: '✦';
            position: absolute;
            left: 0;
            top: 0;
            color: var(--primary);
            font-size: 16px;
            line-height: 1.75;
            text-shadow: 0 0 8px rgba(0, 230, 160, .5);
        }

        /* 数据徽章 */
        .stat-badge {
            background: var(--bg-card);
            border: 1px solid rgba(0, 230, 160, .4);
            border-radius: 12px;
            padding: 20px 16px;
            text-align: center;
            transition: border-color .25s, box-shadow .25s;
        }
        .stat-badge:hover {
            border-color: rgba(0, 230, 160, .7);
            box-shadow: 0 0 20px rgba(0, 230, 160, .15);
        }
        .stat-badge .num {
            font-size: 30px;
            font-weight: 800;
            color: var(--primary);
            text-shadow: 0 0 20px rgba(0, 230, 160, .4);
            line-height: 1.2;
            transition: text-shadow .25s;
        }
        .stat-badge .label {
            font-size: 14px;
            color: var(--text-sub);
            margin-top: 6px;
        }
        .stat-badge:hover .num {
            text-shadow: 0 0 32px rgba(0, 230, 160, .8);
        }

        /* 右侧配图 */
        .side-figure {
            margin: 0 0 24px;
        }
        .side-figure img {
            border-radius: 16px;
            width: 100%;
            object-fit: cover;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow);
            margin-bottom: 12px;
        }
        .side-figure figcaption {
            font-size: 14px;
            color: var(--text-placeholder);
            text-align: center;
        }
        .side-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 24px;
            transition: border-color .25s, box-shadow .25s;
        }
        .side-card:hover {
            border-color: rgba(0, 230, 160, .4);
            box-shadow: var(--shadow);
        }
        .side-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 12px;
        }
        .side-card p {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.8;
            margin-bottom: 0;
        }
        @media (max-width: 991px) {
            .side-figure {
                margin-top: 24px;
            }
        }

        /* ========== FAQ ========== */
        .faq-section {
            padding: 50px 0 40px;
            border-top: 1px solid rgba(255, 255, 255, .06);
        }
        .faq-section .section-title {
            text-align: center;
            margin-bottom: 28px;
        }
        .faq-section .section-title::before {
            display: none;
        }
        .faq-section .section-title::after {
            content: '';
            display: block;
            width: 56px;
            height: 3px;
            background: var(--gradient);
            border-radius: 3px;
            margin: 12px auto 0;
        }
        .accordion-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color) !important;
            border-radius: 12px !important;
            margin-bottom: 12px;
            overflow: hidden;
            transition: border-color .25s;
        }
        .accordion-item:focus-within {
            border-color: rgba(0, 230, 160, .5) !important;
        }
        .accordion-button {
            background: transparent !important;
            color: var(--text-main) !important;
            font-size: 16px;
            font-weight: 600;
            padding: 18px 20px;
            box-shadow: none !important;
            border: 0 !important;
            font-family: var(--font-family);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .accordion-button:hover {
            background: rgba(255, 255, 255, .03) !important;
        }
        .accordion-button:not(.collapsed) {
            color: var(--primary) !important;
            background: rgba(0, 230, 160, .05) !important;
        }
        .accordion-button::after {
            content: '+';
            background: none !important;
            font-size: 22px;
            font-weight: 400;
            color: var(--primary);
            transform: none;
            width: auto;
            height: auto;
            margin-left: auto;
            transition: transform .3s;
        }
        .accordion-button:not(.collapsed)::after {
            content: '−';
            transform: rotate(0deg);
        }
        .accordion-body {
            color: var(--text-sub);
            font-size: 14px;
            line-height: 1.8;
            padding: 0 20px 18px;
            border-left: 2px solid var(--primary);
            margin-left: 20px;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* ========== CTA ========== */
        .cta-section {
            padding: 60px 0 70px;
            text-align: center;
            border-top: 1px solid rgba(255, 255, 255, .06);
            background: linear-gradient(180deg, rgba(20, 27, 36, .6) 0%, rgba(11, 15, 20, 0) 100%);
        }
        .cta-section h2 {
            font-size: 30px;
            font-weight: 800;
            color: var(--text-main);
            margin-bottom: 12px;
        }
        .cta-section p {
            font-size: 16px;
            color: var(--text-sub);
            margin-bottom: 24px;
        }
        .btn-outline {
            display: inline-block;
            border: 1px solid var(--primary);
            color: var(--primary);
            background: transparent;
            border-radius: 10px;
            padding: 12px 36px;
            font-size: 16px;
            font-weight: 600;
            text-decoration: none;
            transition: background .25s, color .25s, box-shadow .25s, transform .25s;
        }
        .btn-outline:hover {
            background: rgba(0, 230, 160, .1);
            color: var(--primary);
            box-shadow: 0 0 24px rgba(0, 230, 160, .2);
            transform: translateY(-2px);
        }
        .btn-outline:focus {
            box-shadow: 0 0 0 3px rgba(0, 230, 160, .35);
            outline: none;
        }

        /* ========== 页脚 ========== */
        .site-footer {
            background: var(--bg-card);
            border-top: 1px solid var(--border-color);
            padding: 50px 0 20px;
        }
        .footer-brand {
            font-size: 22px;
            font-weight: 800;
            display: inline-block;
            margin-bottom: 12px;
        }
        .footer-desc {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.8;
            max-width: 320px;
            margin-bottom: 0;
        }
        .footer-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 16px;
            position: relative;
            padding-bottom: 10px;
        }
        .footer-title::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 32px;
            height: 2px;
            background: var(--gradient);
            border-radius: 2px;
        }
        .footer-links,
        .footer-contact {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-links li,
        .footer-contact li {
            margin-bottom: 10px;
            font-size: 14px;
            color: var(--text-sub);
        }
        .footer-links a {
            color: var(--text-sub);
            text-decoration: none;
            transition: color .2s, padding-left .2s;
        }
        .footer-links a:hover {
            color: var(--primary);
            padding-left: 4px;
        }
        .footer-contact .icon {
            color: var(--primary);
            margin-right: 6px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .08);
            margin-top: 32px;
            padding-top: 20px;
            text-align: center;
            color: var(--text-placeholder);
            font-size: 14px;
        }

        /* ========== 返回顶部 ========== */
        .back-to-top {
            position: fixed;
            bottom: 28px;
            right: 28px;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--bg-card);
            border: 1px solid rgba(0, 230, 160, .5);
            color: var(--primary);
            font-size: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-decoration: none;
            z-index: 100;
            opacity: 0;
            visibility: hidden;
            transform: translateY(10px);
            transition: opacity .3s, transform .3s, visibility .3s, box-shadow .3s;
        }
        .back-to-top.show {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        .back-to-top:hover {
            box-shadow: 0 0 20px rgba(0, 230, 160, .3);
            color: var(--primary);
        }

        /* ========== 响应式 ========== */
        @media (max-width: 767px) {
            .section-title {
                font-size: 22px;
            }
            .step-item {
                padding: 14px 16px;
            }
            .stat-badge {
                padding: 14px 10px;
            }
            .cta-section h2 {
                font-size: 24px;
            }
            .btn-outline {
                padding: 10px 28px;
                font-size: 15px;
            }
        }
        @media (max-width: 520px) {
            .page-hero h1 {
                font-size: 26px;
            }
            .navbar-brand .brand-grad {
                font-size: 18px;
            }
            .brand-sub {
                font-size: 11px;
                padding: 1px 8px;
            }
            .section-title {
                font-size: 20px;
            }
        }