/* roulang page: index */
:root {
            --yl-primary: #10C5B8;
            --yl-primary-dark: #0EA89D;
            --yl-secondary: #E4B65D;
            --yl-bg-dark: #0A0E14;
            --yl-bg-dark-2: #111820;
            --yl-bg-light: #F5F4EF;
            --yl-surface: #FFFFFF;
            --yl-surface-dark: #131A22;
            --yl-text-main: #1A212A;
            --yl-text-muted: #5B6B7B;
            --yl-border: #E4E7EC;
            --yl-radius-card: 18px;
            --yl-radius-btn: 12px;
            --yl-radius-pill: 999px;
            --yl-shadow-card: 0 10px 30px rgba(10, 14, 20, 0.06);
            --yl-shadow-hover: 0 16px 40px rgba(10, 14, 20, 0.12);
            --yl-space-section: 96px;
            --yl-space-section-mobile: 64px;
            --yl-font: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--yl-font);
            font-size: 16px;
            line-height: 1.8;
            color: var(--yl-text-main);
            background-color: var(--yl-bg-light);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: var(--yl-primary);
            text-decoration: none;
            transition: color 0.25s ease;
        }

        a:hover {
            color: var(--yl-primary-dark);
        }

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

        .container {
            max-width: 1320px;
            padding-left: 24px;
            padding-right: 24px;
        }

        .yl-section {
            padding: var(--yl-space-section) 0;
        }

        @media (max-width: 992px) {
            .yl-section {
                padding: 72px 0;
            }
        }

        @media (max-width: 768px) {
            .yl-section {
                padding: var(--yl-space-section-mobile) 0;
            }
        }

        .yl-section-title {
            font-size: clamp(1.6rem, 3vw, 2.4rem);
            font-weight: 900;
            letter-spacing: 0.02em;
            color: var(--yl-text-main);
            line-height: 1.3;
            margin-bottom: 16px;
        }

        .yl-section-subtitle {
            font-size: 16px;
            color: var(--yl-text-muted);
            max-width: 680px;
            line-height: 1.8;
        }

        .yl-section-head {
            margin-bottom: 48px;
        }

        .yl-section-head .yl-section-kicker {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.08em;
            color: var(--yl-primary);
            text-transform: uppercase;
            background: rgba(16, 197, 184, 0.1);
            padding: 6px 14px;
            border-radius: var(--yl-radius-pill);
            margin-bottom: 16px;
        }

        /* ========== NAVBAR ========== */
        .yl-navbar {
            position: relative;
            background: var(--yl-bg-dark);
            min-height: 72px;
            padding: 0;
            z-index: 1030;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }

        .yl-navbar::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: linear-gradient(90deg, var(--yl-primary), var(--yl-secondary));
            z-index: 1;
        }

        .yl-navbar.scrolled {
            background: rgba(10, 14, 20, 0.92);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.25);
        }

        .yl-navbar .navbar-brand {
            font-size: 22px;
            font-weight: 900;
            color: #ffffff;
            letter-spacing: 0.02em;
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 0;
        }

        .yl-navbar .navbar-brand .yl-brand-mark {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--yl-primary), var(--yl-secondary));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            font-weight: 900;
            color: var(--yl-bg-dark);
            flex-shrink: 0;
        }

        .yl-navbar .navbar-nav .nav-link {
            color: rgba(255, 255, 255, 0.75);
            font-size: 15px;
            font-weight: 500;
            padding: 22px 18px;
            position: relative;
            transition: color 0.25s ease;
        }

        .yl-navbar .navbar-nav .nav-link::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 12px;
            right: 12px;
            height: 2px;
            background: var(--yl-primary);
            transform: scaleX(0);
            transform-origin: left;
            transition: transform 0.3s ease;
            box-shadow: 0 0 8px rgba(16, 197, 184, 0.4);
        }

        .yl-navbar .navbar-nav .nav-link:hover {
            color: var(--yl-primary);
        }

        .yl-navbar .navbar-nav .nav-link:hover::after {
            transform: scaleX(1);
        }

        .yl-navbar .navbar-nav .nav-link.active {
            color: var(--yl-primary);
        }

        .yl-navbar .navbar-nav .nav-link.active::after {
            transform: scaleX(1);
        }

        .yl-navbar .yl-nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--yl-primary);
            color: var(--yl-bg-dark);
            font-size: 14px;
            font-weight: 700;
            padding: 10px 22px;
            border-radius: var(--yl-radius-btn);
            border: none;
            transition: all 0.25s ease;
        }

        .yl-navbar .yl-nav-cta:hover {
            background: #2cd4c8;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(16, 197, 184, 0.3);
            color: var(--yl-bg-dark);
        }

        .yl-navbar .navbar-toggler {
            border: 1px solid rgba(255, 255, 255, 0.2);
            padding: 8px 12px;
            color: var(--yl-primary);
            background: transparent;
        }

        .yl-navbar .navbar-toggler:focus {
            box-shadow: 0 0 0 4px rgba(16, 197, 184, 0.25);
        }

        @media (max-width: 991px) {
            .yl-navbar .navbar-collapse {
                background: var(--yl-bg-dark-2);
                padding: 16px 24px;
                border-radius: 0 0 16px 16px;
                margin-top: 8px;
            }

            .yl-navbar .navbar-nav .nav-link {
                padding: 12px 0;
            }

            .yl-navbar .navbar-nav .nav-link::after {
                display: none;
            }

            .yl-navbar .yl-nav-cta {
                margin-top: 12px;
                width: 100%;
                justify-content: center;
            }
        }

        /* ========== HERO ========== */
        .yl-hero {
            position: relative;
            min-height: 85vh;
            display: flex;
            align-items: center;
            background-image: linear-gradient(0deg, rgba(10, 14, 20, 0.78), rgba(10, 14, 20, 0.45)), url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            padding: 120px 0 80px;
        }

        .yl-hero-content {
            max-width: 760px;
        }

        .yl-hero .yl-hero-kicker {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.12);
            color: rgba(255, 255, 255, 0.85);
            font-size: 13px;
            font-weight: 500;
            padding: 8px 18px;
            border-radius: var(--yl-radius-pill);
            margin-bottom: 24px;
            backdrop-filter: blur(4px);
        }

        .yl-hero .yl-hero-kicker i {
            color: var(--yl-primary);
        }

        .yl-hero h1 {
            font-size: clamp(2.5rem, 6vw, 4.5rem);
            font-weight: 900;
            color: #ffffff;
            line-height: 1.2;
            letter-spacing: 0.01em;
            margin-bottom: 20px;
        }

        .yl-hero h1 .yl-text-gradient {
            background: linear-gradient(90deg, var(--yl-primary), var(--yl-secondary));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            color: transparent;
        }

        .yl-hero p.yl-hero-desc {
            font-size: clamp(1rem, 2vw, 1.25rem);
            color: rgba(255, 255, 255, 0.85);
            line-height: 1.8;
            margin-bottom: 36px;
            max-width: 640px;
        }

        .yl-hero .yl-hero-btns {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        .yl-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 700;
            padding: 14px 32px;
            border-radius: var(--yl-radius-btn);
            transition: all 0.25s ease;
            border: 2px solid transparent;
            cursor: pointer;
        }

        .yl-btn-primary {
            background: var(--yl-primary);
            color: var(--yl-bg-dark);
            border-color: var(--yl-primary);
        }

        .yl-btn-primary:hover {
            background: #2cd4c8;
            border-color: #2cd4c8;
            color: var(--yl-bg-dark);
            transform: translateY(-2px);
            box-shadow: 0 10px 25px rgba(16, 197, 184, 0.35);
        }

        .yl-btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 4px 12px rgba(16, 197, 184, 0.25);
        }

        .yl-btn-outline {
            background: transparent;
            color: #ffffff;
            border-color: rgba(255, 255, 255, 0.65);
        }

        .yl-btn-outline:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #ffffff;
            color: #ffffff;
            transform: translateY(-2px);
        }

        .yl-btn-outline:active {
            transform: translateY(0);
        }

        .yl-btn:focus-visible {
            outline: none;
            box-shadow: 0 0 0 4px rgba(16, 197, 184, 0.4);
        }

        .yl-hero-stats {
            margin-top: 60px;
            display: flex;
            gap: 40px;
            flex-wrap: wrap;
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 32px;
        }

        .yl-hero-stats .yl-stat {
            text-align: left;
        }

        .yl-hero-stats .yl-stat-num {
            font-size: 2rem;
            font-weight: 900;
            color: var(--yl-primary);
            line-height: 1.2;
            letter-spacing: 0.02em;
        }

        .yl-hero-stats .yl-stat-label {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.65);
            margin-top: 4px;
            letter-spacing: 0.04em;
        }

        @media (max-width: 768px) {
            .yl-hero {
                min-height: auto;
                padding: 100px 0 64px;
            }

            .yl-hero-stats {
                gap: 24px;
                margin-top: 40px;
            }

            .yl-hero-stats .yl-stat-num {
                font-size: 1.5rem;
            }
        }

        @media (max-width: 576px) {
            .yl-hero h1 {
                font-size: 2.2rem;
            }

            .yl-hero .yl-hero-btns .yl-btn {
                width: 100%;
                justify-content: center;
            }
        }

        /* ========== BRAND / INTRO SECTION ========== */
        .yl-intro {
            background: var(--yl-bg-light);
        }

        .yl-intro .yl-intro-media {
            border-radius: 24px;
            overflow: hidden;
            position: relative;
            height: 100%;
            min-height: 420px;
            box-shadow: var(--yl-shadow-card);
        }

        .yl-intro .yl-intro-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            position: absolute;
            inset: 0;
        }

        .yl-intro .yl-intro-media::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(0deg, rgba(10, 14, 20, 0.3), transparent);
        }

        .yl-intro .yl-intro-content {
            padding: 20px 0;
        }

        .yl-intro .yl-intro-content h2 {
            font-size: clamp(1.6rem, 3vw, 2.4rem);
            font-weight: 900;
            color: var(--yl-text-main);
            line-height: 1.3;
            margin-bottom: 24px;
        }

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

        .yl-intro .yl-link-arrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-weight: 600;
            font-size: 15px;
            color: var(--yl-primary);
            margin-top: 12px;
            transition: gap 0.25s ease;
        }

        .yl-intro .yl-link-arrow:hover {
            gap: 14px;
        }

        @media (max-width: 991px) {
            .yl-intro .yl-intro-media {
                min-height: 320px;
                margin-bottom: 32px;
            }
        }

        /* ========== BUSINESS CARDS ========== */
        .yl-business {
            background: var(--yl-surface);
            position: relative;
        }

        .yl-business::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--yl-secondary), transparent);
            opacity: 0.4;
        }

        .yl-card {
            background: var(--yl-surface);
            border-radius: var(--yl-radius-card);
            border: 1px solid var(--yl-border);
            padding: 24px;
            box-shadow: var(--yl-shadow-card);
            transition: all 0.3s ease;
            height: 100%;
            display: flex;
            flex-direction: column;
            position: relative;
            overflow: hidden;
        }

        .yl-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--yl-shadow-hover);
            border-color: rgba(16, 197, 184, 0.4);
        }

        .yl-card .yl-card-img {
            border-radius: 14px;
            overflow: hidden;
            margin: -8px -8px 20px;
            position: relative;
            aspect-ratio: 16 / 10;
            background: var(--yl-bg-dark);
        }

        .yl-card .yl-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .yl-card:hover .yl-card-img img {
            transform: scale(1.04);
        }

        .yl-card .yl-card-tag {
            display: inline-block;
            background: rgba(16, 197, 184, 0.1);
            color: var(--yl-primary);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: var(--yl-radius-pill);
            margin-bottom: 12px;
            letter-spacing: 0.02em;
            align-self: flex-start;
        }

        .yl-card .yl-card-title {
            font-size: 1.25rem;
            font-weight: 800;
            color: var(--yl-text-main);
            line-height: 1.4;
            margin-bottom: 10px;
            transition: color 0.25s ease;
        }

        .yl-card:hover .yl-card-title {
            color: var(--yl-primary);
        }

        .yl-card .yl-card-text {
            font-size: 14px;
            color: var(--yl-text-muted);
            line-height: 1.7;
            flex-grow: 1;
            margin-bottom: 16px;
        }

        .yl-card .yl-card-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--yl-primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap 0.25s ease;
        }

        .yl-card .yl-card-link:hover {
            gap: 10px;
        }

        .yl-card-large {
            padding: 28px;
        }

        .yl-card-large .yl-card-title {
            font-size: 1.5rem;
        }

        @media (max-width: 768px) {
            .yl-card-large {
                padding: 20px;
            }
        }

        /* ========== NEWS / CMS LIST ========== */
        .yl-news-section {
            background: var(--yl-bg-light);
        }

        .yl-news-card {
            background: var(--yl-surface);
            border-radius: var(--yl-radius-card);
            border: 1px solid var(--yl-border);
            padding: 20px;
            display: flex;
            gap: 24px;
            align-items: flex-start;
            transition: all 0.3s ease;
            height: 100%;
            box-shadow: var(--yl-shadow-card);
            position: relative;
            overflow: hidden;
        }

        .yl-news-card::before {
            content: "";
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 3px;
            background: var(--yl-primary);
            transform: scaleY(0);
            transition: transform 0.3s ease;
        }

        .yl-news-card:hover {
            box-shadow: var(--yl-shadow-hover);
            transform: translateX(4px);
            border-color: rgba(16, 197, 184, 0.3);
        }

        .yl-news-card:hover::before {
            transform: scaleY(1);
        }

        .yl-news-card .yl-news-thumb {
            width: 180px;
            height: 120px;
            border-radius: 12px;
            overflow: hidden;
            flex-shrink: 0;
            background: var(--yl-bg-dark);
        }

        .yl-news-card .yl-news-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .yl-news-card:hover .yl-news-thumb img {
            transform: scale(1.05);
        }

        .yl-news-card .yl-news-body {
            flex: 1;
            min-width: 0;
        }

        .yl-news-card .yl-news-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 8px;
            font-size: 13px;
            color: var(--yl-text-muted);
        }

        .yl-news-card .yl-news-meta .yl-news-cat {
            background: rgba(16, 197, 184, 0.12);
            color: var(--yl-primary);
            padding: 2px 10px;
            border-radius: var(--yl-radius-pill);
            font-weight: 600;
            font-size: 12px;
        }

        .yl-news-card .yl-news-meta .yl-news-date {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .yl-news-card .yl-news-title {
            font-size: 17px;
            font-weight: 700;
            color: var(--yl-text-main);
            line-height: 1.5;
            margin-bottom: 6px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            transition: color 0.25s ease;
        }

        .yl-news-card:hover .yl-news-title {
            color: var(--yl-primary);
        }

        .yl-news-card .yl-news-excerpt {
            font-size: 14px;
            color: var(--yl-text-muted);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 8px;
        }

        .yl-news-card .yl-news-link {
            font-size: 13px;
            font-weight: 600;
            color: var(--yl-primary);
        }

        .yl-news-card .yl-news-link:hover {
            text-decoration: underline;
        }

        .yl-news-empty {
            border: 2px dashed #C5C9CE;
            border-radius: var(--yl-radius-card);
            padding: 48px 24px;
            text-align: center;
            color: var(--yl-text-muted);
            background: var(--yl-bg-light);
            font-size: 15px;
        }

        .yl-news-empty i {
            font-size: 32px;
            color: #C5C9CE;
            display: block;
            margin-bottom: 12px;
        }

        @media (max-width: 768px) {
            .yl-news-card {
                flex-direction: column;
                gap: 16px;
            }

            .yl-news-card .yl-news-thumb {
                width: 100%;
                height: 180px;
            }
        }

        /* ========== TRUST / LOGO WALL ========== */
        .yl-trust {
            background: var(--yl-bg-light);
            border-top: 1px solid var(--yl-border);
        }

        .yl-trust .yl-trust-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .yl-trust .yl-trust-item {
            height: 120px;
            background: var(--yl-bg-light);
            border: 1px solid var(--yl-border);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #A0AAB4;
            font-size: 15px;
            font-weight: 500;
            transition: all 0.3s ease;
            padding: 12px;
            text-align: center;
        }

        .yl-trust .yl-trust-item:hover {
            border-color: rgba(16, 197, 184, 0.4);
            color: var(--yl-primary);
            background: rgba(16, 197, 184, 0.03);
        }

        .yl-trust .yl-trust-item img {
            max-height: 56px;
            max-width: 80%;
            object-fit: contain;
        }

        @media (max-width: 768px) {
            .yl-trust .yl-trust-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        /* ========== CTA ========== */
        .yl-cta {
            background: linear-gradient(0deg, rgba(10, 14, 20, 0.8), rgba(10, 14, 20, 0.6)), url('/assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            padding: 100px 0;
            text-align: center;
            position: relative;
        }

        .yl-cta::before {
            content: "";
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 200px;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--yl-primary), transparent);
        }

        .yl-cta h2 {
            font-size: clamp(1.8rem, 4vw, 3rem);
            font-weight: 900;
            color: #ffffff;
            margin-bottom: 16px;
        }

        .yl-cta p {
            color: rgba(255, 255, 255, 0.75);
            font-size: 17px;
            max-width: 600px;
            margin: 0 auto 40px;
            line-height: 1.8;
        }

        .yl-cta .yl-cta-form {
            display: flex;
            gap: 12px;
            max-width: 520px;
            margin: 0 auto;
            align-items: stretch;
        }

        .yl-cta .yl-cta-form .form-control {
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.25);
            border-radius: var(--yl-radius-btn);
            padding: 14px 20px;
            color: #ffffff;
            flex: 1;
            min-width: 0;
        }

        .yl-cta .yl-cta-form .form-control::placeholder {
            color: rgba(255, 255, 255, 0.5);
        }

        .yl-cta .yl-cta-form .form-control:focus {
            background: rgba(255, 255, 255, 0.15);
            border-color: var(--yl-primary);
            box-shadow: 0 0 0 4px rgba(16, 197, 184, 0.2);
            outline: none;
            color: #ffffff;
        }

        .yl-cta .yl-cta-form .form-control.is-invalid {
            border-color: #D9534F;
            box-shadow: 0 0 0 4px rgba(217, 83, 79, 0.2);
        }

        .yl-cta .yl-cta-form .yl-btn {
            flex-shrink: 0;
        }

        .yl-cta .yl-cta-msg {
            margin-top: 16px;
            font-size: 14px;
            color: var(--yl-primary);
            min-height: 20px;
        }

        .yl-cta .yl-cta-msg.error {
            color: #D9534F;
        }

        @media (max-width: 576px) {
            .yl-cta {
                padding: 64px 0;
            }

            .yl-cta .yl-cta-form {
                flex-direction: column;
            }

            .yl-cta .yl-cta-form .yl-btn {
                width: 100%;
            }
        }

        /* ========== FOOTER ========== */
        .yl-footer {
            background: var(--yl-bg-dark);
            color: #8A95A0;
            padding: 80px 0 0;
            position: relative;
        }

        .yl-footer::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, var(--yl-primary), var(--yl-secondary));
            opacity: 0.6;
        }

        .yl-footer h5 {
            color: rgba(255, 255, 255, 0.85);
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 20px;
        }

        .yl-footer .yl-footer-links a {
            display: block;
            color: #8A95A0;
            font-size: 14px;
            padding: 7px 0;
            transition: color 0.25s ease, padding-left 0.25s ease;
        }

        .yl-footer .yl-footer-links a:hover {
            color: var(--yl-primary);
            padding-left: 6px;
        }

        .yl-footer .yl-footer-contact li {
            display: flex;
            gap: 12px;
            margin-bottom: 12px;
            font-size: 14px;
            color: #8A95A0;
            line-height: 1.6;
        }

        .yl-footer .yl-footer-contact li i {
            color: var(--yl-primary);
            margin-top: 3px;
            width: 16px;
            flex-shrink: 0;
        }

        .yl-footer .yl-footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            margin-top: 48px;
            padding: 24px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
        }

        .yl-footer .yl-footer-logo {
            font-size: 18px;
            font-weight: 900;
            color: #ffffff;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .yl-footer .yl-footer-logo .yl-brand-mark {
            width: 28px;
            height: 28px;
            background: linear-gradient(135deg, var(--yl-primary), var(--yl-secondary));
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            font-weight: 900;
            color: var(--yl-bg-dark);
        }

        .yl-footer .yl-footer-copyright {
            font-size: 13px;
            color: #6B7684;
        }

        @media (max-width: 768px) {
            .yl-footer {
                padding-top: 56px;
            }

            .yl-footer .yl-footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ========== GENERAL ========== */
        .yl-faq .accordion-item {
            border: none;
            margin-bottom: 8px;
            background: transparent;
            border-radius: 8px !important;
        }

        .yl-faq .accordion-button {
            background: var(--yl-bg-light);
            border-radius: 8px !important;
            font-weight: 600;
            font-size: 16px;
            padding: 20px 24px;
            color: var(--yl-text-main);
            box-shadow: none;
            transition: all 0.3s ease;
        }

        .yl-faq .accordion-button:not(.collapsed) {
            background: var(--yl-surface);
            color: var(--yl-primary);
            box-shadow: none;
            border-left: 3px solid var(--yl-primary);
        }

        .yl-faq .accordion-button:focus {
            box-shadow: 0 0 0 4px rgba(16, 197, 184, 0.15);
            border-color: var(--yl-primary);
        }

        .yl-faq .accordion-button::after {
            background-image: none;
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            content: "\f078";
            color: var(--yl-text-muted);
            transform: none;
            font-size: 14px;
        }

        .yl-faq .accordion-button:not(.collapsed)::after {
            color: var(--yl-primary);
        }

        .yl-faq .accordion-body {
            background: var(--yl-surface);
            border-radius: 0 0 8px 8px;
            padding: 20px 24px;
            color: var(--yl-text-muted);
            line-height: 1.8;
            font-size: 15px;
        }

        .yl-divider {
            border: none;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--yl-border), transparent);
            margin: 0;
        }

        .yl-invalid-feedback {
            display: block;
            width: 100%;
            margin-top: 8px;
            font-size: 13px;
            color: #D9534F;
            text-align: left;
        }

        [data-yl-success] {
            color: var(--yl-primary);
        }

        /* scroll to top */
        .yl-scroll-top {
            position: fixed;
            right: 30px;
            bottom: 30px;
            width: 44px;
            height: 44px;
            background: var(--yl-primary);
            border: none;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--yl-bg-dark);
            font-size: 18px;
            cursor: pointer;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
            z-index: 1020;
        }

        .yl-scroll-top.show {
            opacity: 1;
            visibility: visible;
        }

        .yl-scroll-top:hover {
            background: #2cd4c8;
            transform: translateY(-3px);
        }

        .yl-scroll-top:focus-visible {
            outline: none;
            box-shadow: 0 0 0 4px rgba(16, 197, 184, 0.4);
        }

/* roulang page: category1 */
:root {
            --yl-primary: #10C5B8;
            --yl-secondary: #E4B65D;
            --yl-bg-dark: #0A0E14;
            --yl-bg-light: #F5F4EF;
            --yl-surface: #FFFFFF;
            --yl-surface-dark: #131A22;
            --yl-text-main: #1A212A;
            --yl-text-muted: #5B6B7B;
            --yl-border: #E2E6EA;
            --yl-radius-card: 18px;
            --yl-radius-btn: 12px;
            --yl-radius-img: 12px;
            --yl-shadow-sm: 0 10px 30px rgba(10, 14, 20, 0.06);
            --yl-shadow-hover: 0 16px 40px rgba(10, 14, 20, 0.12);
            --yl-space: 96px;
            --yl-font: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--yl-font);
            background: var(--yl-bg-light);
            color: var(--yl-text-main);
            line-height: 1.7;
            margin: 0;
            -webkit-font-smoothing: antialiased;
        }

        a {
            text-decoration: none;
            color: var(--yl-primary);
            transition: color .3s ease;
        }

        a:hover {
            color: #0DA294;
        }

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

        .container {
            max-width: 1320px;
        }

        .yl-section {
            padding: var(--yl-space) 0;
        }

        .yl-section-alt {
            background: var(--yl-surface);
        }

        .yl-section-head {
            margin-bottom: 48px;
        }

        .yl-section-head.center {
            text-align: center;
            margin-left: auto;
            margin-right: auto;
        }

        .yl-section-title {
            font-size: clamp(1.6rem, 3vw, 2.4rem);
            font-weight: 900;
            color: var(--yl-text-main);
            margin-bottom: 8px;
            letter-spacing: -0.01em;
            line-height: 1.4;
        }

        .yl-section-subtitle {
            color: var(--yl-text-muted);
            font-size: 16px;
            max-width: 680px;
            line-height: 1.8;
        }

        .yl-tag {
            display: inline-block;
            background: rgba(16, 197, 184, 0.1);
            color: var(--yl-primary);
            font-size: 12px;
            font-weight: 700;
            padding: 6px 16px;
            border-radius: 999px;
            letter-spacing: 0.04em;
        }

        /* ===== 按钮 ===== */
        .yl-btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 13px 30px;
            border-radius: 999px;
            font-weight: 700;
            font-size: 15px;
            border: 2px solid transparent;
            transition: all .3s ease;
            line-height: 1.4;
        }

        .yl-btn-primary {
            background: var(--yl-primary);
            color: #0A0E14;
        }

        .yl-btn-primary:hover,
        .yl-btn-primary:focus {
            background: #2CD5C9;
            color: #0A0E14;
            transform: translateY(-2px);
            box-shadow: 0 12px 24px rgba(16, 197, 184, 0.35);
        }

        .yl-btn-outline {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, 0.7);
        }

        .yl-btn-outline:hover,
        .yl-btn-outline:focus {
            background: rgba(255, 255, 255, 0.1);
            border-color: #fff;
            color: #fff;
            transform: translateY(-2px);
        }

        /* ===== 导航 ===== */
        .yl-navbar {
            background: rgba(10, 14, 20, 0.96);
            min-height: 72px;
            backdrop-filter: blur(8px);
            padding-top: 0;
            padding-bottom: 0;
            border-top: 1px solid;
            border-image: linear-gradient(90deg, var(--yl-primary), var(--yl-secondary)) 1;
            transition: box-shadow .3s;
        }

        .yl-navbar .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            color: #fff;
            font-size: 20px;
            font-weight: 700;
            letter-spacing: 0.01em;
            padding: 16px 0;
        }

        .yl-brand-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 34px;
            height: 34px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--yl-primary), var(--yl-secondary));
            color: #0A0E14;
            font-weight: 900;
            font-size: 17px;
            flex-shrink: 0;
        }

        .yl-navbar .nav-link {
            color: #C8D0DA;
            font-size: 15px;
            font-weight: 500;
            padding: 24px 16px !important;
            position: relative;
            transition: color .3s;
        }

        .yl-navbar .nav-link:hover,
        .yl-navbar .nav-link:focus {
            color: var(--yl-primary);
        }

        .yl-navbar .nav-link.active {
            color: var(--yl-primary);
        }

        .yl-navbar .nav-link.active::after {
            content: '';
            position: absolute;
            left: 16px;
            right: 16px;
            bottom: 0;
            height: 2px;
            background: var(--yl-primary);
            border-radius: 2px;
            box-shadow: 0 0 8px rgba(16, 197, 184, 0.5);
        }

        .yl-nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--yl-primary);
            color: #0A0E14;
            font-weight: 700;
            font-size: 14px;
            padding: 10px 24px;
            border-radius: 999px;
            transition: all .3s ease;
            white-space: nowrap;
        }

        .yl-nav-cta:hover {
            background: #2CD5C9;
            color: #0A0E14;
            box-shadow: 0 0 20px rgba(16, 197, 184, 0.35);
            transform: translateY(-1px);
        }

        .navbar-toggler {
            border: none;
            color: #fff;
            padding: 8px 12px;
            font-size: 20px;
        }

        .navbar-toggler:focus {
            box-shadow: 0 0 0 4px rgba(16, 197, 184, 0.2);
        }

        /* ===== 分类页 Hero ===== */
        .yl-cat-hero {
            background: linear-gradient(0deg, rgba(10, 14, 20, 0.78), rgba(10, 14, 20, 0.45)), url('/assets/images/backpic/back-1.webp') center / cover no-repeat;
            padding: 130px 0 110px;
            color: #fff;
            position: relative;
        }

        .yl-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            color: #8E9AA7;
            font-size: 14px;
            margin-bottom: 24px;
        }

        .yl-breadcrumb a {
            color: #C8D0DA;
        }

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

        .yl-breadcrumb .yl-breadcrumb-sep {
            color: #4A5560;
        }

        .yl-cat-hero h1 {
            font-size: clamp(2rem, 4vw, 3rem);
            font-weight: 900;
            margin-bottom: 16px;
            letter-spacing: -0.01em;
            color: #fff;
        }

        .yl-cat-hero p {
            font-size: clamp(1rem, 1.6vw, 1.2rem);
            color: #D4D9E0;
            max-width: 680px;
            line-height: 1.8;
            margin-bottom: 0;
        }

        .yl-hero-tags {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
            margin-top: 28px;
        }

        .yl-hero-tag {
            border: 1px solid rgba(255, 255, 255, 0.25);
            color: #E6E9EF;
            padding: 6px 16px;
            border-radius: 999px;
            font-size: 13px;
            background: rgba(255, 255, 255, 0.06);
            transition: border-color .3s, color .3s;
        }

        .yl-hero-tag:hover {
            border-color: var(--yl-primary);
            color: var(--yl-primary);
        }

        /* ===== 统计条 ===== */
        .yl-stats-band {
            background: var(--yl-bg-dark);
            border-radius: 24px;
            padding: 48px 36px;
            margin-top: -60px;
            position: relative;
            z-index: 2;
            box-shadow: 0 20px 40px rgba(10, 14, 20, 0.25);
            border: 1px solid rgba(16, 197, 184, 0.12);
        }

        .yl-stat-number {
            font-size: 2.6rem;
            font-weight: 900;
            color: var(--yl-primary);
            letter-spacing: 0.02em;
            line-height: 1.2;
        }

        .yl-stat-label {
            color: #8E9AA7;
            font-size: 14px;
            margin-top: 6px;
        }

        /* ===== 卡片 ===== */
        .yl-card {
            background: var(--yl-surface);
            border-radius: var(--yl-radius-card);
            overflow: hidden;
            box-shadow: var(--yl-shadow-sm);
            height: 100%;
            display: flex;
            flex-direction: column;
            border: 2px solid transparent;
            transition: transform .3s, box-shadow .3s, border-color .3s;
        }

        .yl-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--yl-shadow-hover);
            border-color: rgba(16, 197, 184, 0.35);
        }

        .yl-card-media {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 9;
            background: #E5E7EB;
        }

        .yl-card-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .4s ease;
        }

        .yl-card:hover .yl-card-media img {
            transform: scale(1.04);
        }

        .yl-card-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            background: rgba(10, 14, 20, 0.78);
            color: var(--yl-primary);
            padding: 5px 14px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
            backdrop-filter: blur(4px);
            border: 1px solid rgba(16, 197, 184, 0.25);
            z-index: 1;
        }

        .yl-card-body {
            padding: 24px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .yl-card-meta {
            color: var(--yl-text-muted);
            font-size: 13px;
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .yl-card-title {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--yl-text-main);
            line-height: 1.5;
            transition: color .3s;
        }

        .yl-card:hover .yl-card-title {
            color: var(--yl-primary);
        }

        .yl-card-text {
            color: var(--yl-text-muted);
            font-size: 15px;
            line-height: 1.8;
            margin-bottom: 18px;
            flex: 1;
        }

        .yl-card-link {
            color: var(--yl-primary);
            font-weight: 700;
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap .3s ease;
        }

        .yl-card-link:hover {
            gap: 10px;
            color: #0DA294;
        }

        .yl-card-large .yl-card-title {
            font-size: 1.45rem;
        }

        /* ===== 信息发布通道 ===== */
        .yl-channel-wrap {
            background: var(--yl-surface);
            border-radius: 24px;
            box-shadow: var(--yl-shadow-sm);
            overflow: hidden;
        }

        .yl-channel-media {
            height: 100%;
            min-height: 440px;
            overflow: hidden;
            border-radius: 0;
        }

        .yl-channel-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .yl-channel-body {
            padding: 56px 48px;
        }

        .yl-channel-body h2 {
            font-size: clamp(1.5rem, 2.6vw, 2.2rem);
            font-weight: 900;
            color: var(--yl-text-main);
            margin-bottom: 20px;
            line-height: 1.4;
        }

        .yl-channel-body>p {
            color: var(--yl-text-muted);
            font-size: 15px;
            line-height: 1.8;
            margin-bottom: 20px;
        }

        .yl-feature-list {
            list-style: none;
            padding: 0;
            margin: 24px 0 0;
        }

        .yl-feature-item {
            display: flex;
            gap: 16px;
            padding: 18px 0;
            border-bottom: 1px solid var(--yl-border);
            align-items: flex-start;
        }

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

        .yl-feature-icon {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: rgba(16, 197, 184, 0.1);
            color: var(--yl-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            flex-shrink: 0;
        }

        .yl-feature-title {
            font-weight: 700;
            font-size: 16px;
            color: var(--yl-text-main);
            margin-bottom: 4px;
        }

        .yl-feature-desc {
            color: var(--yl-text-muted);
            font-size: 14px;
            line-height: 1.7;
        }

        /* ===== 流程 ===== */
        .yl-process-step {
            position: relative;
            padding: 30px 28px;
            background: var(--yl-surface);
            border-radius: var(--yl-radius-card);
            height: 100%;
            box-shadow: var(--yl-shadow-sm);
            border-top: 3px solid var(--yl-primary);
            transition: transform .3s, box-shadow .3s;
        }

        .yl-process-step:hover {
            transform: translateY(-4px);
            box-shadow: var(--yl-shadow-hover);
        }

        .yl-step-num {
            font-size: 13px;
            color: var(--yl-secondary);
            font-weight: 700;
            letter-spacing: 0.12em;
        }

        .yl-step-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: rgba(16, 197, 184, 0.1);
            color: var(--yl-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin: 18px 0 14px;
        }

        .yl-step-title {
            font-weight: 700;
            font-size: 18px;
            color: var(--yl-text-main);
            margin-bottom: 8px;
        }

        .yl-step-desc {
            color: var(--yl-text-muted);
            font-size: 14px;
            line-height: 1.8;
            margin: 0;
        }

        /* ===== FAQ ===== */
        .yl-faq {
            max-width: 880px;
            margin: 0 auto;
        }

        .yl-faq .accordion-item {
            background: var(--yl-surface);
            border: 1px solid var(--yl-border);
            border-radius: 14px;
            margin-bottom: 12px;
            overflow: hidden;
            box-shadow: none;
        }

        .yl-faq .accordion-button {
            background: var(--yl-surface);
            color: var(--yl-text-main);
            font-weight: 600;
            font-size: 16px;
            padding: 20px 24px;
            box-shadow: none;
            transition: color .3s;
        }

        .yl-faq .accordion-button:not(.collapsed) {
            background: var(--yl-surface);
            color: var(--yl-primary);
            box-shadow: inset 0 -1px var(--yl-border);
        }

        .yl-faq .accordion-button:focus {
            box-shadow: 0 0 0 4px rgba(16, 197, 184, 0.12);
            border-color: transparent;
        }

        .yl-faq .accordion-body {
            color: var(--yl-text-muted);
            padding: 0 24px 22px;
            font-size: 15px;
            line-height: 1.8;
        }

        /* ===== CTA ===== */
        .yl-cta-band {
            background: linear-gradient(135deg, #0A0E14 0%, #131A22 100%);
            border-radius: 28px;
            padding: 72px 56px;
            position: relative;
            overflow: hidden;
            color: #fff;
        }

        .yl-cta-band::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -60px;
            width: 260px;
            height: 260px;
            background: radial-gradient(circle, rgba(16, 197, 184, 0.25), transparent 70%);
            pointer-events: none;
        }

        .yl-cta-band::after {
            content: '';
            position: absolute;
            bottom: -100px;
            left: 42%;
            width: 200px;
            height: 200px;
            background: radial-gradient(circle, rgba(228, 182, 93, 0.18), transparent 70%);
            pointer-events: none;
        }

        .yl-cta-band .yl-section-title {
            color: #fff;
        }

        .yl-cta-band .yl-section-subtitle {
            color: #A6B0BC;
            margin: 0 auto;
        }

        .yl-subscribe-form {
            display: flex;
            gap: 0;
            max-width: 540px;
            margin: 28px auto 0;
        }

        .yl-subscribe-input {
            border-radius: 999px 0 0 999px;
            border: 1px solid rgba(255, 255, 255, 0.16);
            background: rgba(255, 255, 255, 0.06);
            color: #fff;
            padding: 14px 24px;
            width: 100%;
            font-size: 15px;
            outline: none;
            transition: all .3s ease;
        }

        .yl-subscribe-input::placeholder {
            color: #8E9AA7;
        }

        .yl-subscribe-input:focus {
            border-color: var(--yl-primary);
            box-shadow: 0 0 0 4px rgba(16, 197, 184, 0.15);
            background: rgba(255, 255, 255, 0.1);
        }

        .yl-subscribe-btn {
            border-radius: 0 999px 999px 0;
            border: none;
            background: var(--yl-primary);
            color: #0A0E14;
            font-weight: 700;
            font-size: 15px;
            padding: 14px 30px;
            cursor: pointer;
            transition: background .3s, box-shadow .3s;
            white-space: nowrap;
        }

        .yl-subscribe-btn:hover {
            background: #2CD5C9;
            box-shadow: 0 0 20px rgba(16, 197, 184, 0.3);
        }

        .yl-subscribe-form.is-error .yl-subscribe-input {
            border-color: #D9534F;
            box-shadow: 0 0 0 4px rgba(217, 83, 79, 0.15);
        }

        .yl-subscribe-form.is-success .yl-subscribe-input {
            border-color: var(--yl-primary);
        }

        .yl-form-feedback {
            color: #D9534F;
            font-size: 13px;
            margin-top: 8px;
            min-height: 20px;
            text-align: center;
        }

        .yl-subscribe-form.is-success+.yl-form-feedback {
            color: var(--yl-primary);
        }

        /* ===== 页脚 ===== */
        .yl-footer {
            background: var(--yl-bg-dark);
            color: #8E9AA7;
            padding: 72px 0 32px;
            margin-top: 96px;
        }

        .yl-footer-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            color: #fff;
            font-size: 20px;
            font-weight: 700;
        }

        .yl-footer h5 {
            color: rgba(255, 255, 255, 0.85);
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 18px;
        }

        .yl-footer-links {
            display: flex;
            flex-direction: column;
            gap: 0;
        }

        .yl-footer-links a {
            color: #8E9AA7;
            font-size: 14px;
            line-height: 32px;
            transition: color .3s, padding-left .3s;
        }

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

        .yl-footer-contact li {
            font-size: 14px;
            line-height: 32px;
            color: #8E9AA7;
        }

        .yl-footer-contact i {
            width: 20px;
            color: var(--yl-primary);
            margin-right: 6px;
        }

        .yl-footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            margin-top: 48px;
            padding-top: 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
        }

        .yl-footer-copyright {
            font-size: 14px;
            color: #6B7684;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 992px) {
            .yl-navbar .navbar-collapse {
                background: rgba(10, 14, 20, 0.98);
                border-radius: 0 0 16px 16px;
                padding: 8px 16px 16px;
            }

            .yl-navbar .nav-link {
                padding: 12px 8px !important;
            }

            .yl-navbar .nav-link.active::after {
                left: 8px;
                right: auto;
                bottom: 4px;
                width: 32px;
            }

            .yl-nav-cta {
                margin-top: 10px;
                display: inline-flex;
            }
        }

        @media (max-width: 768px) {
            .yl-section {
                padding: 64px 0;
            }

            .yl-cat-hero {
                padding: 90px 0 80px;
            }

            .yl-stats-band {
                margin-top: -40px;
                padding: 32px 20px;
            }

            .yl-stat-number {
                font-size: 2.1rem;
            }

            .yl-channel-body {
                padding: 32px 24px;
            }

            .yl-channel-media {
                min-height: 280px;
            }

            .yl-cta-band {
                padding: 44px 24px;
                border-radius: 20px;
            }

            .yl-subscribe-form {
                flex-direction: column;
            }

            .yl-subscribe-input {
                border-radius: 999px;
            }

            .yl-subscribe-btn {
                border-radius: 999px;
                margin-top: 10px;
                width: 100%;
            }
        }

        @media (max-width: 576px) {
            .yl-stat-number {
                font-size: 1.8rem;
            }

            .yl-card-title {
                font-size: 1.15rem;
            }

            .yl-cta-band {
                padding: 36px 20px;
            }

            .yl-footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

/* roulang page: article */
/* ========== Design System ========== */
        :root {
            --yl-primary: #10C5B8;
            --yl-primary-dark: #0EADA2;
            --yl-secondary: #E4B65D;
            --yl-bg-dark: #0A0E14;
            --yl-bg-light: #F5F4EF;
            --yl-surface: #FFFFFF;
            --yl-surface-dark: #131A22;
            --yl-text-main: #1A212A;
            --yl-text-muted: #5B6B7B;
            --yl-border-light: rgba(10, 14, 20, 0.08);
            --yl-radius: 18px;
            --yl-radius-sm: 12px;
            --yl-radius-pill: 999px;
            --yl-shadow: 0 10px 30px rgba(10, 14, 20, 0.06);
            --yl-shadow-hover: 0 16px 40px rgba(10, 14, 20, 0.12);
            --yl-shadow-neon: 0 0 12px rgba(16, 197, 184, 0.35);
            --yl-space: 96px;
            --yl-space-mobile: 64px;
            --yl-transition: 0.3s ease;
            --yl-font: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
        }

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

        html { scroll-behavior: smooth; }

        body {
            font-family: var(--yl-font);
            font-size: 16px;
            line-height: 1.7;
            color: var(--yl-text-main);
            background-color: var(--yl-bg-light);
            -webkit-font-smoothing: antialiased;
        }

        a { color: var(--yl-primary); text-decoration: none; transition: color var(--yl-transition), background var(--yl-transition); }
        a:hover { color: var(--yl-primary-dark); }
        img { max-width: 100%; height: auto; }
        h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.3; color: var(--yl-text-main); }

        .container { max-width: 1320px; }

        /* ===== Buttons ===== */
        .yl-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            font-size: 15px;
            font-weight: 600;
            border-radius: var(--yl-radius-sm);
            border: 1px solid transparent;
            transition: all var(--yl-transition);
            cursor: pointer;
            text-align: center;
            white-space: nowrap;
        }
        .yl-btn:focus-visible { outline: 3px solid rgba(16, 197, 184, 0.4); outline-offset: 2px; }
        .yl-btn-primary { background: var(--yl-primary); color: #0A0E14; }
        .yl-btn-primary:hover { background: #30D5C8; color: #0A0E14; transform: translateY(-2px); box-shadow: var(--yl-shadow-neon); }
        .yl-btn-primary:active { transform: translateY(0); box-shadow: 0 2px 8px rgba(16, 197, 184, 0.25); }
        .yl-btn-outline { background: transparent; border-color: rgba(255, 255, 255, 0.6); color: #fff; }
        .yl-btn-outline:hover { background: rgba(255, 255, 255, 0.12); border-color: #fff; color: #fff; transform: translateY(-2px); }
        .yl-btn-outline:active { transform: translateY(0); }
        .yl-btn-light { background: #fff; color: var(--yl-text-main); }
        .yl-btn-light:hover { background: #E6F7F5; color: var(--yl-primary-dark); transform: translateY(-2px); }
        .yl-btn-light:active { transform: translateY(0); }

        /* ===== Navbar ===== */
        .yl-navbar {
            background: var(--yl-bg-dark);
            min-height: 72px;
            padding: 14px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            position: relative;
            transition: background 0.3s ease, box-shadow 0.3s ease;
            z-index: 1030;
        }
        .yl-navbar::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, var(--yl-primary), var(--yl-secondary));
            opacity: 0.8;
            z-index: 1;
        }
        .yl-navbar-scrolled {
            background: rgba(10, 14, 20, 0.95);
            backdrop-filter: blur(10px);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.25);
        }
        .yl-navbar .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 20px;
            color: #fff;
            letter-spacing: 0.01em;
            transition: color var(--yl-transition);
        }
        .yl-navbar .navbar-brand:hover { color: var(--yl-primary); }
        .yl-brand-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 34px;
            height: 34px;
            background: var(--yl-primary);
            color: #0A0E14;
            font-weight: 900;
            font-size: 16px;
            border-radius: 10px;
            flex-shrink: 0;
        }
        .yl-navbar .navbar-nav .nav-link {
            color: #C5CDD5;
            font-size: 15px;
            font-weight: 500;
            padding: 8px 16px;
            position: relative;
            transition: color var(--yl-transition);
        }
        .yl-navbar .navbar-nav .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 16px;
            right: 16px;
            height: 2px;
            background: var(--yl-primary);
            border-radius: 2px;
            transform: scaleX(0);
            opacity: 0;
            transition: all var(--yl-transition);
        }
        .yl-navbar .navbar-nav .nav-link:hover { color: var(--yl-primary); }
        .yl-navbar .navbar-nav .nav-link:hover::after { transform: scaleX(1); opacity: 1; }
        .yl-navbar .navbar-nav .nav-link.active { color: var(--yl-primary); }
        .yl-navbar .navbar-nav .nav-link.active::after {
            transform: scaleX(1);
            opacity: 1;
            box-shadow: 0 0 8px rgba(16, 197, 184, 0.5);
        }
        .yl-nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 20px;
            background: var(--yl-primary);
            color: #0A0E14;
            font-size: 14px;
            font-weight: 700;
            border-radius: var(--yl-radius-sm);
            transition: all var(--yl-transition);
            white-space: nowrap;
        }
        .yl-nav-cta:hover { background: #30D5C8; color: #0A0E14; transform: translateY(-1px); box-shadow: var(--yl-shadow-neon); }
        .yl-nav-cta:active { transform: translateY(0); }
        .yl-navbar .navbar-toggler {
            border: 1px solid rgba(255, 255, 255, 0.25);
            padding: 6px 10px;
            color: #fff;
            border-radius: 8px;
        }
        .yl-navbar .navbar-toggler:focus { box-shadow: 0 0 0 3px rgba(16, 197, 184, 0.25); }
        .yl-navbar .navbar-toggler i { font-size: 18px; color: #fff; }

        /* ===== Breadcrumb ===== */
        .yl-breadcrumb-bar {
            background: #fff;
            border-bottom: 1px solid var(--yl-border-light);
            min-height: 48px;
            display: flex;
            align-items: center;
            font-size: 13px;
            color: var(--yl-text-muted);
        }
        .yl-breadcrumb-bar .container {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: nowrap;
            overflow: hidden;
            white-space: nowrap;
        }
        .yl-breadcrumb-bar a { color: var(--yl-text-muted); transition: color var(--yl-transition); flex-shrink: 0; }
        .yl-breadcrumb-bar a:hover { color: var(--yl-primary); }
        .yl-breadcrumb-bar .sep { font-size: 11px; color: #B8C0C8; flex-shrink: 0; }
        .yl-breadcrumb-bar .yl-bread-current {
            color: #8B96A0;
            overflow: hidden;
            text-overflow: ellipsis;
            text-align: right;
            flex-shrink: 1;
        }

        /* ===== Article Main ===== */
        .yl-article-main {
            padding: 64px 0 80px;
            background: var(--yl-bg-light);
        }
        .yl-article-card {
            max-width: 860px;
            margin: 0 auto;
            background: var(--yl-surface);
            border-radius: var(--yl-radius);
            box-shadow: var(--yl-shadow);
            padding: 48px 40px;
            border: 1px solid rgba(10, 14, 20, 0.04);
        }
        .yl-article-category-badge { margin-bottom: 14px; }
        .yl-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 5px 14px;
            background: rgba(16, 197, 184, 0.1);
            color: var(--yl-primary-dark);
            font-size: 12px;
            font-weight: 600;
            border-radius: var(--yl-radius-pill);
        }
        .yl-article-header {
            margin-bottom: 32px;
            padding-bottom: 24px;
            border-bottom: 1px solid var(--yl-border-light);
        }
        .yl-article-title {
            font-size: clamp(1.8rem, 4vw, 2.8rem);
            font-weight: 900;
            line-height: 1.35;
            color: var(--yl-text-main);
            margin-bottom: 18px;
        }
        .yl-article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 18px;
            color: var(--yl-text-muted);
            font-size: 13px;
        }
        .yl-article-meta .meta-item { display: inline-flex; align-items: center; gap: 6px; }
        .yl-article-meta .meta-item i { color: var(--yl-primary); }

        /* Article Body */
        .yl-article-body {
            font-size: 16px;
            line-height: 1.8;
            color: #2A313A;
        }
        .yl-article-body > *:last-child { margin-bottom: 0; }
        .yl-article-body p { margin-bottom: 1.5rem; }
        .yl-article-body h2 {
            font-size: 1.5rem;
            font-weight: 700;
            margin: 2rem 0 1.25rem;
            padding-left: 16px;
            position: relative;
            line-height: 1.4;
        }
        .yl-article-body h2::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0.12em;
            width: 4px;
            height: 0.82em;
            background: var(--yl-primary);
            border-radius: 4px;
        }
        .yl-article-body h3 {
            font-size: 1.25rem;
            font-weight: 700;
            margin: 1.75rem 0 1rem;
            color: var(--yl-text-main);
        }
        .yl-article-body a { color: var(--yl-primary); text-decoration: underline; text-underline-offset: 3px; }
        .yl-article-body a:hover { color: var(--yl-primary-dark); }
        .yl-article-body img { border-radius: var(--yl-radius-sm); margin: 1.5rem 0; }
        .yl-article-body figure { margin: 1.5rem 0; }
        .yl-article-body figcaption { font-size: 13px; color: var(--yl-text-muted); text-align: center; margin-top: 8px; }
        .yl-article-body blockquote {
            background: #F5F7F8;
            border-left: 4px solid var(--yl-primary);
            border-radius: var(--yl-radius-sm);
            padding: 18px 24px;
            margin: 1.5rem 0;
            color: var(--yl-text-muted);
            font-style: normal;
        }
        .yl-article-body ul, .yl-article-body ol { margin-bottom: 1.5rem; padding-left: 1.5rem; }
        .yl-article-body li { margin-bottom: 0.5rem; }
        .yl-article-body table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
            font-size: 15px;
        }
        .yl-article-body table th { background: #F5F6F8; font-weight: 600; text-align: left; color: var(--yl-text-main); }
        .yl-article-body table th, .yl-article-body table td { border: 1px solid #E8EAED; padding: 12px 16px; line-height: 1.6; }
        .yl-article-body table tr:nth-child(even) td { background: #FAFBFC; }
        .yl-article-body hr { border: none; border-top: 1px solid var(--yl-border-light); margin: 2rem 0; }
        .yl-article-body code { background: #F0F2F4; border-radius: 4px; padding: 2px 7px; font-size: 0.9em; color: #D9534F; }

        /* Tags */
        .yl-article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            padding-top: 24px;
            margin-top: 32px;
            border-top: 1px solid var(--yl-border-light);
        }
        .yl-tag {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            padding: 6px 14px;
            background: rgba(16, 197, 184, 0.08);
            color: var(--yl-primary-dark);
            border-radius: var(--yl-radius-pill);
            font-size: 12px;
            font-weight: 500;
        }

        /* Pager */
        .yl-article-pager {
            display: flex;
            justify-content: space-between;
            gap: 16px;
            margin-top: 32px;
            padding-top: 28px;
            border-top: 1px solid var(--yl-border-light);
        }
        .yl-pager-link {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 16px 20px;
            background: #F7F8FA;
            border-radius: var(--yl-radius-sm);
            flex: 1;
            max-width: 48%;
            color: var(--yl-text-main);
            transition: all var(--yl-transition);
        }
        .yl-pager-link:hover {
            background: #EFFAF9;
            color: var(--yl-primary-dark);
            box-shadow: 0 6px 16px rgba(16, 197, 184, 0.08);
        }
        .yl-pager-link:active { transform: scale(0.98); }
        .yl-pager-link.yl-pager-next { justify-content: flex-end; text-align: right; }
        .yl-pager-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: var(--yl-primary);
            color: #0A0E14;
            border-radius: 10px;
            font-size: 14px;
            flex-shrink: 0;
        }
        .yl-pager-label { display: block; font-size: 12px; color: var(--yl-text-muted); margin-bottom: 3px; }
        .yl-pager-title {
            display: block;
            font-size: 14px;
            font-weight: 600;
            color: var(--yl-text-main);
            line-height: 1.4;
            overflow: hidden;
            white-space: nowrap;
            text-overflow: ellipsis;
            max-width: 200px;
        }

        /* Empty State */
        .yl-article-empty {
            max-width: 640px;
            margin: 0 auto;
            text-align: center;
            background: var(--yl-surface);
            border-radius: var(--yl-radius);
            box-shadow: var(--yl-shadow);
            padding: 72px 40px;
            border: 2px dashed #DDE0E5;
        }
        .yl-empty-icon {
            width: 80px;
            height: 80px;
            margin: 0 auto 24px;
            background: rgba(16, 197, 184, 0.1);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            color: var(--yl-primary);
        }
        .yl-article-empty h2 { font-size: 28px; font-weight: 700; margin-bottom: 12px; }
        .yl-article-empty p { color: var(--yl-text-muted); margin-bottom: 28px; max-width: 420px; margin-left: auto; margin-right: auto; }

        /* ===== Related Section ===== */
        .yl-related-section { padding: 64px 0 80px; background: #fff; border-top: 1px solid var(--yl-border-light); }
        .yl-related-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 32px; }
        .yl-related-header h2 { font-size: clamp(1.4rem, 2.4vw, 1.8rem); font-weight: 800; margin-bottom: 0; }
        .yl-section-line { flex: 1; height: 1px; background: linear-gradient(90deg, var(--yl-primary), transparent); margin-left: 24px; }
        .yl-related-card {
            background: var(--yl-bg-light);
            border-radius: var(--yl-radius);
            overflow: hidden;
            border: 1px solid rgba(10, 14, 20, 0.05);
            transition: all var(--yl-transition);
            height: 100%;
        }
        .yl-related-card:hover { transform: translateY(-4px); box-shadow: var(--yl-shadow-hover); border-color: var(--yl-primary); }
        .yl-related-thumb { width: 100%; height: 180px; object-fit: cover; transition: transform 0.4s ease; }
        .yl-related-card:hover .yl-related-thumb { transform: scale(1.04); }
        .yl-related-body { padding: 20px; }
        .yl-related-body h3 { font-size: 16px; font-weight: 700; margin-bottom: 8px; line-height: 1.45; }
        .yl-related-body h3 a { color: var(--yl-text-main); }
        .yl-related-body h3 a:hover { color: var(--yl-primary-dark); }
        .yl-related-meta { font-size: 12px; color: var(--yl-text-muted); display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }

        /* ===== CTA ===== */
        .yl-cta {
            padding: 72px 0;
            position: relative;
            overflow: hidden;
            background-image: linear-gradient(0deg, rgba(10, 14, 20, 0.85), rgba(10, 14, 20, 0.7)), url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
        }
        .yl-cta::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px; background: linear-gradient(90deg, var(--yl-primary), var(--yl-secondary)); opacity: 0.6; z-index: 1; }
        .yl-cta::after {
            content: '';
            position: absolute;
            width: 320px;
            height: 320px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(16, 197, 184, 0.15), transparent 70%);
            bottom: -160px;
            right: 8%;
            pointer-events: none;
        }
        .yl-cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap; position: relative; z-index: 2; }
        .yl-cta-text h2 { color: #fff; font-size: clamp(1.4rem, 3vw, 2rem); font-weight: 800; margin-bottom: 8px; }
        .yl-cta-text p { color: rgba(255, 255, 255, 0.7); margin-bottom: 0; font-size: 15px; }

        /* ===== Footer ===== */
        .yl-footer { background: var(--yl-bg-dark); color: #8B96A0; padding: 64px 0 24px; font-size: 14px; }
        .yl-footer h5 { color: rgba(255, 255, 255, 0.85); font-size: 16px; font-weight: 600; margin-bottom: 18px; }
        .yl-footer-links { display: flex; flex-direction: column; gap: 10px; }
        .yl-footer-links a { color: #6B7684; transition: color var(--yl-transition), padding-left var(--yl-transition); line-height: 1.4; }
        .yl-footer-links a:hover { color: var(--yl-primary); padding-left: 4px; }
        .yl-footer-contact { display: flex; flex-direction: column; gap: 10px; color: #6B7684; list-style: none; padding-left: 0; }
        .yl-footer-contact li { display: flex; align-items: center; gap: 10px; }
        .yl-footer-contact i { color: var(--yl-primary); width: 16px; text-align: center; }
        .yl-footer-logo { display: inline-flex; align-items: center; gap: 10px; color: #fff; font-weight: 700; font-size: 18px; }
        .yl-footer-bottom { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-top: 40px; padding-top: 20px; border-top: 1px solid rgba(255, 255, 255, 0.08); }
        .yl-footer-copyright { font-size: 13px; color: #5D6874; }

        /* ===== Responsive ===== */
        @media (max-width: 991.98px) {
            .yl-navbar .navbar-collapse {
                background: var(--yl-bg-dark);
                padding: 16px;
                margin-top: 12px;
                border-radius: var(--yl-radius-sm);
                border: 1px solid rgba(255, 255, 255, 0.08);
            }
            .yl-navbar .navbar-nav .nav-link { padding: 12px 8px; border-bottom: 1px solid rgba(255, 255, 255, 0.04); }
            .yl-navbar .navbar-nav .nav-link::after { display: none; }
            .yl-nav-cta { margin-top: 12px; justify-content: center; width: 100%; }
            .yl-article-card { padding: 32px 28px; }
        }
        @media (max-width: 767.98px) {
            .yl-article-main { padding: 32px 0 48px; }
            .yl-article-card { padding: 24px 20px; border-radius: 14px; }
            .yl-article-meta { gap: 12px; }
            .yl-article-pager { flex-direction: column; }
            .yl-pager-link { max-width: 100%; }
            .yl-cta-inner { flex-direction: column; text-align: center; justify-content: center; }
            .yl-cta-text p { margin-bottom: 16px; }
            .yl-footer-bottom { flex-direction: column; text-align: center; }
            .yl-related-thumb { height: 160px; }
        }
        @media (max-width: 575.98px) {
            .yl-article-card { padding: 20px 16px; border-radius: 12px; }
            .yl-article-title { font-size: 1.5rem; }
            .yl-btn { width: 100%; }
            .yl-article-body { font-size: 15px; }
            .yl-article-body blockquote { padding: 14px 16px; }
            .yl-breadcrumb-bar { font-size: 12px; }
            .yl-breadcrumb-bar .container { gap: 6px; }
            .container { padding-left: 16px; padding-right: 16px; }
        }

/* roulang page: category2 */
:root {
            --yl-primary: #10C5B8;
            --yl-secondary: #E4B65D;
            --yl-bg-dark: #0A0E14;
            --yl-bg-light: #F5F4EF;
            --yl-surface: #FFFFFF;
            --yl-surface-dark: #131A22;
            --yl-text-main: #1A212A;
            --yl-text-muted: #5B6B7B;
            --yl-border-light: rgba(10, 14, 20, 0.08);
            --yl-radius-card: 18px;
            --yl-radius-btn: 12px;
            --yl-radius-pill: 999px;
            --yl-shadow-card: 0 10px 30px rgba(10, 14, 20, 0.06);
            --yl-shadow-hover: 0 16px 40px rgba(10, 14, 20, 0.12);
            --yl-space-section: 96px;
            --yl-space-section-sm: 64px;
            --yl-font-sans: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--yl-font-sans);
            font-size: 16px;
            line-height: 1.8;
            background-color: var(--yl-bg-light);
            color: var(--yl-text-main);
            -webkit-font-smoothing: antialiased;
        }
        a {
            text-decoration: none;
            color: var(--yl-primary);
            transition: color .25s ease;
        }
        a:hover {
            color: #0da99d;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            max-width: 1320px;
            padding-left: 24px;
            padding-right: 24px;
        }
        /* ===== 导航 ===== */
        .yl-navbar {
            background: var(--yl-bg-dark);
            min-height: 72px;
            padding: 0;
            border-top: 1px solid transparent;
            box-shadow: 0 4px 30px rgba(0, 0, 0, .25);
        }
        .yl-navbar::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, var(--yl-primary), var(--yl-secondary));
            z-index: 10;
        }
        .yl-navbar .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 900;
            font-size: 20px;
            color: #fff;
            letter-spacing: .02em;
            padding: 0;
        }
        .yl-brand-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--yl-primary), var(--yl-secondary));
            color: #0A0E14;
            font-size: 18px;
            font-weight: 900;
            flex-shrink: 0;
        }
        .yl-navbar .nav-link {
            color: rgba(255, 255, 255, .82);
            font-size: 15px;
            font-weight: 500;
            padding: 22px 14px !important;
            position: relative;
            transition: color .25s;
        }
        .yl-navbar .nav-link:hover {
            color: var(--yl-primary);
        }
        .yl-navbar .nav-link.active {
            color: var(--yl-primary);
        }
        .yl-navbar .nav-link.active::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 14px;
            right: 14px;
            height: 2px;
            background: var(--yl-primary);
            border-radius: 2px;
            box-shadow: 0 0 8px rgba(16, 197, 184, .5);
        }
        .yl-nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--yl-primary);
            color: #0A0E14;
            font-weight: 700;
            font-size: 14px;
            border-radius: var(--yl-radius-btn);
            padding: 10px 20px;
            border: 1px solid transparent;
            transition: all .3s ease;
            white-space: nowrap;
        }
        .yl-nav-cta:hover {
            background: #17d6c8;
            color: #0A0E14;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(16, 197, 184, .35);
        }
        .yl-navbar .navbar-toggler {
            border: 1px solid rgba(255, 255, 255, .2);
            color: #fff;
            font-size: 18px;
            padding: 6px 12px;
            border-radius: 8px;
        }
        .yl-navbar .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(16, 197, 184, .3);
        }
        @media (max-width: 991.98px) {
            .yl-navbar .navbar-collapse {
                background: var(--yl-bg-dark);
                padding: 16px 8px 20px;
                border-radius: 0 0 16px 16px;
                margin-top: 8px;
            }
            .yl-navbar .nav-link {
                padding: 12px 14px !important;
            }
            .yl-navbar .nav-link.active::after {
                display: none;
            }
            .yl-nav-cta {
                margin-top: 12px;
                justify-content: center;
            }
        }
        /* ===== Hero ===== */
        .yl-cat-hero {
            position: relative;
            min-height: 60vh;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            background: linear-gradient(0deg, rgba(10, 14, 20, .78), rgba(10, 14, 20, .45)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            padding: 80px 0 60px;
        }
        .yl-cat-hero .yl-hero-inner {
            max-width: 780px;
            margin: 0 auto;
            position: relative;
            z-index: 2;
        }
        .yl-cat-hero .yl-hero-tag {
            display: inline-block;
            background: rgba(16, 197, 184, .15);
            border: 1px solid rgba(16, 197, 184, .4);
            color: var(--yl-primary);
            font-size: 13px;
            font-weight: 600;
            border-radius: var(--yl-radius-pill);
            padding: 4px 16px;
            letter-spacing: .08em;
            margin-bottom: 20px;
        }
        .yl-cat-hero h1 {
            color: #fff;
            font-size: clamp(2.2rem, 5vw, 3.8rem);
            font-weight: 900;
            letter-spacing: .02em;
            margin-bottom: 14px;
        }
        .yl-cat-hero p {
            color: rgba(255, 255, 255, .85);
            font-size: clamp(1rem, 2vw, 1.25rem);
            line-height: 1.75;
            max-width: 640px;
            margin: 0 auto 28px;
        }
        .yl-hero-btns {
            display: flex;
            gap: 12px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .yl-btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--yl-primary);
            color: #0A0E14;
            font-weight: 700;
            font-size: 15px;
            border-radius: var(--yl-radius-btn);
            padding: 12px 28px;
            border: 1px solid transparent;
            transition: all .3s ease;
        }
        .yl-btn-primary:hover {
            background: #17d6c8;
            color: #0A0E14;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(16, 197, 184, .35);
        }
        .yl-btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: #fff;
            font-weight: 600;
            font-size: 15px;
            border-radius: var(--yl-radius-btn);
            padding: 12px 28px;
            border: 1px solid rgba(255, 255, 255, .6);
            transition: all .3s ease;
        }
        .yl-btn-outline:hover {
            background: rgba(255, 255, 255, .12);
            border-color: var(--yl-primary);
            color: var(--yl-primary);
        }
        /* ===== 通用板块 ===== */
        .yl-section {
            padding: var(--yl-space-section) 0;
        }
        .yl-section-sm {
            padding: var(--yl-space-section-sm) 0;
        }
        .yl-section-dark {
            background: var(--yl-bg-dark);
            color: #fff;
        }
        .yl-section-light {
            background: var(--yl-bg-light);
        }
        .yl-section-white {
            background: #fff;
        }
        .yl-section-header {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 48px;
        }
        .yl-section-header .yl-eyebrow {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--yl-primary);
            background: rgba(16, 197, 184, .1);
            border-radius: var(--yl-radius-pill);
            padding: 4px 16px;
            letter-spacing: .06em;
            margin-bottom: 12px;
        }
        .yl-section-header h2 {
            font-size: clamp(1.6rem, 3vw, 2.4rem);
            font-weight: 800;
            color: var(--yl-text-main);
            margin-bottom: 12px;
            line-height: 1.35;
        }
        .yl-section-header p {
            color: var(--yl-text-muted);
            font-size: 16px;
            line-height: 1.8;
        }
        .yl-section-header.light h2 {
            color: #fff;
        }
        .yl-section-header.light p {
            color: rgba(255, 255, 255, .7);
        }
        /* ===== 研究体系介绍 ===== */
        .yl-intro-img {
            border-radius: var(--yl-radius-card);
            overflow: hidden;
            box-shadow: var(--yl-shadow-card);
            transition: transform .4s ease, box-shadow .4s ease;
        }
        .yl-intro-img:hover {
            transform: translateY(-4px);
            box-shadow: var(--yl-shadow-hover);
        }
        .yl-intro-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            min-height: 320px;
        }
        .yl-intro-content {
            padding-left: 16px;
        }
        .yl-intro-content h2 {
            font-size: clamp(1.6rem, 3vw, 2.2rem);
            font-weight: 800;
            margin-bottom: 18px;
            line-height: 1.4;
        }
        .yl-intro-content p {
            color: var(--yl-text-muted);
            margin-bottom: 16px;
        }
        .yl-intro-points {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 14px;
            margin-top: 24px;
        }
        .yl-intro-points .item {
            display: flex;
            align-items: center;
            gap: 10px;
            background: var(--yl-surface);
            border-radius: 12px;
            padding: 14px 16px;
            border: 1px solid var(--yl-border-light);
            font-weight: 600;
            font-size: 14px;
            transition: all .3s;
        }
        .yl-intro-points .item i {
            color: var(--yl-primary);
            font-size: 18px;
        }
        .yl-intro-points .item:hover {
            border-color: var(--yl-primary);
            box-shadow: 0 4px 12px rgba(16, 197, 184, .12);
        }
        @media (max-width: 767.98px) {
            .yl-intro-content {
                padding-left: 0;
                margin-top: 24px;
            }
            .yl-intro-points {
                grid-template-columns: 1fr;
            }
        }
        /* ===== 研究领域卡片 ===== */
        .yl-card {
            background: var(--yl-surface);
            border: 1px solid var(--yl-border-light);
            border-radius: var(--yl-radius-card);
            box-shadow: var(--yl-shadow-card);
            overflow: hidden;
            transition: all .35s ease;
            height: 100%;
        }
        .yl-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--yl-shadow-hover);
            border-color: rgba(16, 197, 184, .4);
        }
        .yl-card-img {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 9;
            background: var(--yl-bg-dark);
        }
        .yl-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s ease;
        }
        .yl-card:hover .yl-card-img img {
            transform: scale(1.04);
        }
        .yl-card-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            background: rgba(10, 14, 20, .68);
            backdrop-filter: blur(6px);
            color: var(--yl-primary);
            font-size: 12px;
            font-weight: 600;
            border-radius: var(--yl-radius-pill);
            padding: 4px 12px;
            letter-spacing: .04em;
            border: 1px solid rgba(16, 197, 184, .3);
        }
        .yl-card-body {
            padding: 22px 24px 26px;
        }
        .yl-card-body h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
            line-height: 1.45;
            transition: color .3s;
        }
        .yl-card:hover .yl-card-body h3 {
            color: var(--yl-primary);
        }
        .yl-card-body p {
            color: var(--yl-text-muted);
            font-size: 14px;
            line-height: 1.75;
            margin-bottom: 16px;
        }
        .yl-card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--yl-primary);
            transition: gap .3s;
        }
        .yl-card-link:hover {
            gap: 12px;
            color: #0da99d;
        }
        .yl-card-misc {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: var(--yl-text-muted);
            border-top: 1px solid var(--yl-border-light);
            padding-top: 14px;
            margin-top: 4px;
        }
        .yl-card-misc .date {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        /* ===== 观点区 ===== */
        .yl-insight-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .yl-insight-item {
            background: var(--yl-surface-dark);
            border: 1px solid rgba(255, 255, 255, .06);
            border-radius: var(--yl-radius-card);
            padding: 28px 26px;
            transition: all .35s;
            position: relative;
            overflow: hidden;
        }
        .yl-insight-item::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: linear-gradient(90deg, var(--yl-primary), transparent);
        }
        .yl-insight-item:hover {
            border-color: rgba(16, 197, 184, .35);
            transform: translateY(-4px);
        }
        .yl-insight-item .num {
            font-size: 32px;
            font-weight: 900;
            color: var(--yl-primary);
            line-height: 1;
            margin-bottom: 14px;
            font-family: 'Barlow Condensed', sans-serif;
            letter-spacing: .02em;
        }
        .yl-insight-item h4 {
            color: #fff;
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .yl-insight-item p {
            color: rgba(255, 255, 255, .65);
            font-size: 14px;
            line-height: 1.75;
            margin-bottom: 0;
        }
        @media (max-width: 767.98px) {
            .yl-insight-grid {
                grid-template-columns: 1fr;
            }
        }
        /* ===== 研究流程 ===== */
        .yl-process-wrap {
            position: relative;
        }
        .yl-process-step {
            display: flex;
            gap: 24px;
            position: relative;
            padding-bottom: 48px;
        }
        .yl-process-step:last-child {
            padding-bottom: 0;
        }
        .yl-process-step::before {
            content: "";
            position: absolute;
            left: 31px;
            top: 64px;
            bottom: 0;
            width: 1px;
            background: linear-gradient(180deg, var(--yl-primary), rgba(16, 197, 184, .08));
        }
        .yl-process-step:last-child::before {
            display: none;
        }
        .yl-process-icon {
            flex-shrink: 0;
            width: 64px;
            height: 64px;
            border-radius: 18px;
            background: var(--yl-surface);
            border: 1px solid var(--yl-border-light);
            box-shadow: var(--yl-shadow-card);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: var(--yl-primary);
            z-index: 2;
            transition: all .3s;
        }
        .yl-process-step:hover .yl-process-icon {
            background: var(--yl-primary);
            color: #0A0E14;
            box-shadow: 0 8px 20px rgba(16, 197, 184, .3);
        }
        .yl-process-content {
            padding-top: 6px;
        }
        .yl-process-content h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .yl-process-content p {
            color: var(--yl-text-muted);
            font-size: 15px;
            line-height: 1.75;
            max-width: 460px;
            margin-bottom: 0;
        }
        @media (max-width: 575.98px) {
            .yl-process-step {
                flex-direction: column;
                gap: 14px;
                padding-bottom: 36px;
            }
            .yl-process-step::before {
                left: 31px;
                top: 64px;
            }
        }
        /* ===== 应用场景 ===== */
        .yl-scene-card {
            background: var(--yl-surface);
            border: 1px solid var(--yl-border-light);
            border-radius: var(--yl-radius-card);
            padding: 32px 28px;
            height: 100%;
            transition: all .35s;
            text-align: center;
        }
        .yl-scene-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--yl-shadow-hover);
            border-color: rgba(16, 197, 184, .4);
        }
        .yl-scene-icon {
            width: 64px;
            height: 64px;
            border-radius: 18px;
            background: rgba(16, 197, 184, .1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 26px;
            color: var(--yl-primary);
            margin: 0 auto 18px;
            transition: all .3s;
        }
        .yl-scene-card:hover .yl-scene-icon {
            background: var(--yl-primary);
            color: #0A0E14;
        }
        .yl-scene-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .yl-scene-card p {
            color: var(--yl-text-muted);
            font-size: 14px;
            line-height: 1.75;
            margin-bottom: 0;
        }
        /* ===== FAQ ===== */
        .yl-faq-wrap {
            max-width: 820px;
            margin: 0 auto;
        }
        .yl-faq-wrap .accordion-item {
            border: none;
            background: transparent;
            border-bottom: 1px solid var(--yl-border-light);
            margin-bottom: 0;
            border-radius: 0 !important;
        }
        .yl-faq-wrap .accordion-button {
            background: transparent;
            font-size: 16px;
            font-weight: 600;
            padding: 22px 8px;
            color: var(--yl-text-main);
            box-shadow: none;
            border-radius: 0 !important;
            transition: color .3s;
        }
        .yl-faq-wrap .accordion-button:not(.collapsed) {
            color: var(--yl-primary);
            background: transparent;
            box-shadow: none;
        }
        .yl-faq-wrap .accordion-button::after {
            background-image: none;
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            content: "\f078";
            font-size: 14px;
            color: var(--yl-text-muted);
            transition: transform .3s;
        }
        .yl-faq-wrap .accordion-button:not(.collapsed)::after {
            transform: rotate(180deg);
            color: var(--yl-primary);
        }
        .yl-faq-wrap .accordion-body {
            padding: 0 8px 24px;
            color: var(--yl-text-muted);
            font-size: 15px;
            line-height: 1.8;
            background: transparent;
        }
        .yl-faq-wrap .accordion-button:focus {
            box-shadow: none;
        }
        /* ===== CTA ===== */
        .yl-cta-block {
            position: relative;
            background: linear-gradient(135deg, rgba(10, 14, 20, .92), rgba(10, 14, 20, .8)), url('/assets/images/backpic/back-3.webp') center/cover no-repeat;
            border-radius: 24px;
            padding: 64px 48px;
            overflow: hidden;
            color: #fff;
            text-align: center;
        }
        .yl-cta-block::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 120px;
            height: 120px;
            background: radial-gradient(circle, rgba(16, 197, 184, .25), transparent 70%);
            border-radius: 50%;
        }
        .yl-cta-block h2 {
            font-size: clamp(1.6rem, 3vw, 2.4rem);
            font-weight: 800;
            margin-bottom: 14px;
        }
        .yl-cta-block p {
            color: rgba(255, 255, 255, .75);
            max-width: 520px;
            margin: 0 auto 28px;
            font-size: 16px;
            line-height: 1.75;
        }
        .yl-cta-form {
            display: flex;
            gap: 0;
            max-width: 520px;
            margin: 0 auto;
        }
        .yl-cta-form .form-control {
            border-radius: var(--yl-radius-btn) 0 0 var(--yl-radius-btn);
            border: 1px solid transparent;
            padding: 14px 18px;
            font-size: 15px;
            background: rgba(255, 255, 255, .12);
            color: #fff;
            transition: all .3s;
        }
        .yl-cta-form .form-control::placeholder {
            color: rgba(255, 255, 255, .45);
        }
        .yl-cta-form .form-control:focus {
            background: rgba(255, 255, 255, .16);
            border-color: var(--yl-primary);
            box-shadow: 0 0 0 4px rgba(16, 197, 184, .2);
            color: #fff;
        }
        .yl-cta-form .yl-btn-primary {
            border-radius: 0 var(--yl-radius-btn) var(--yl-radius-btn) 0;
            flex-shrink: 0;
        }
        .yl-cta-note {
            font-size: 13px;
            color: rgba(255, 255, 255, .45);
            margin-top: 14px;
        }
        @media (max-width: 575.98px) {
            .yl-cta-block {
                padding: 40px 20px;
                border-radius: 18px;
            }
            .yl-cta-form {
                flex-direction: column;
                gap: 12px;
            }
            .yl-cta-form .form-control {
                border-radius: var(--yl-radius-btn);
            }
            .yl-cta-form .yl-btn-primary {
                border-radius: var(--yl-radius-btn);
                width: 100%;
                justify-content: center;
            }
        }
        /* ===== Footer ===== */
        .yl-footer {
            background: var(--yl-bg-dark);
            color: #9AA5B1;
            padding: 64px 0 20px;
            border-top: 1px solid rgba(255, 255, 255, .04);
        }
        .yl-footer h5 {
            color: rgba(255, 255, 255, .9);
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 18px;
        }
        .yl-footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            color: #fff;
            font-size: 20px;
            font-weight: 900;
        }
        .yl-footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .yl-footer-links a {
            color: #9AA5B1;
            font-size: 14px;
            transition: color .25s, padding-left .25s;
        }
        .yl-footer-links a:hover {
            color: var(--yl-primary);
            padding-left: 4px;
        }
        .yl-footer-contact li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            margin-bottom: 10px;
            color: #9AA5B1;
        }
        .yl-footer-contact li i {
            color: var(--yl-primary);
            width: 16px;
            text-align: center;
        }
        .yl-footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .06);
            margin-top: 40px;
            padding-top: 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 14px;
        }
        .yl-footer-copyright {
            color: #6B7684;
            font-size: 13px;
        }
        @media (max-width: 767.98px) {
            .yl-footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }
        /* ===== 辅助 ===== */
        .yl-section-dark .yl-section-header h2 {
            color: #fff;
        }
        .yl-section-dark .yl-section-header p {
            color: rgba(255, 255, 255, .65);
        }
        .yl-stats-bar {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 40px;
            border-top: 1px solid rgba(255, 255, 255, .1);
            padding-top: 32px;
        }
        .yl-stats-bar .item {
            text-align: center;
        }
        .yl-stats-bar .num {
            font-size: 32px;
            font-weight: 900;
            color: var(--yl-primary);
            line-height: 1.2;
        }
        .yl-stats-bar .label {
            font-size: 13px;
            color: rgba(255, 255, 255, .6);
            margin-top: 4px;
        }
        @media (max-width: 575.98px) {
            .yl-stats-bar {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
        }

/* roulang page: category3 */
:root {
            --yl-primary: #10C5B8;
            --yl-secondary: #E4B65D;
            --yl-bg-dark: #0A0E14;
            --yl-bg-light: #F5F4EF;
            --yl-surface: #FFFFFF;
            --yl-surface-dark: #131A22;
            --yl-text-main: #1A212A;
            --yl-text-muted: #5B6B7B;
            --yl-border: #E5E8EC;
            --yl-radius-card: 18px;
            --yl-radius-btn: 12px;
            --yl-radius-pill: 999px;
            --yl-shadow-card: 0 10px 30px rgba(10, 14, 20, 0.06);
            --yl-shadow-hover: 0 16px 40px rgba(10, 14, 20, 0.12);
            --yl-section-pad: 96px;
            --yl-font: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--yl-font);
            background: var(--yl-bg-light);
            color: var(--yl-text-main);
            font-size: 16px;
            line-height: 1.8;
            margin: 0;
            -webkit-font-smoothing: antialiased;
        }

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

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

        a:hover {
            color: #0ba5a0;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            margin: 0 0 .5em;
        }

        p {
            margin: 0 0 1rem;
        }

        .yl-section {
            padding: var(--yl-section-pad) 0;
        }

        .yl-section-sm {
            padding: 64px 0;
        }

        .yl-section-dark {
            background: var(--yl-bg-dark);
            color: #E8ECF1;
        }

        .yl-section-head {
            margin-bottom: 48px;
        }

        .yl-section-head .yl-eyebrow {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: .12em;
            color: var(--yl-primary);
            text-transform: none;
            margin-bottom: 8px;
        }

        .yl-section-head h2 {
            font-size: clamp(1.6rem, 3vw, 2.4rem);
            font-weight: 900;
            color: var(--yl-text-main);
        }

        .yl-section-dark .yl-section-head h2 {
            color: #fff;
        }

        .yl-section-head p {
            color: var(--yl-text-muted);
            max-width: 640px;
            line-height: 1.75;
        }

        .yl-section-dark .yl-section-head p {
            color: #A8B2BE;
        }

        .yl-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--yl-radius-btn);
            font-weight: 700;
            font-size: 15px;
            border: 1px solid transparent;
            transition: all .25s ease;
            cursor: pointer;
            line-height: 1.4;
        }

        .yl-btn-primary {
            background: var(--yl-primary);
            color: #06241F;
            box-shadow: 0 4px 14px rgba(16, 197, 184, 0.25);
        }

        .yl-btn-primary:hover {
            background: #37D6C9;
            color: #06241F;
            transform: translateY(-2px);
            box-shadow: 0 8px 22px rgba(16, 197, 184, 0.35);
        }

        .yl-btn-primary:focus-visible {
            outline: 3px solid rgba(16, 197, 184, 0.4);
            outline-offset: 2px;
        }

        .yl-btn-outline {
            background: transparent;
            border-color: rgba(255, 255, 255, .8);
            color: #fff;
        }

        .yl-btn-outline:hover {
            background: rgba(255, 255, 255, .1);
            border-color: var(--yl-primary);
            color: var(--yl-primary);
        }

        .yl-btn-outline:focus-visible {
            outline: 3px solid rgba(255, 255, 255, .35);
            outline-offset: 2px;
        }

        .yl-btn-dark {
            background: var(--yl-bg-dark);
            color: #fff;
            border-color: transparent;
        }

        .yl-btn-dark:hover {
            background: #1C252F;
            color: var(--yl-primary);
        }

        .yl-tag {
            display: inline-block;
            padding: 4px 14px;
            background: rgba(16, 197, 184, .1);
            color: var(--yl-primary);
            border-radius: var(--yl-radius-pill);
            font-size: 12px;
            font-weight: 600;
            line-height: 1.5;
            margin-bottom: 12px;
        }

        .yl-tag-gold {
            background: rgba(228, 182, 93, .15);
            color: #C2964E;
        }

        .yl-text-link {
            font-weight: 600;
            font-size: 14px;
            color: var(--yl-primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            border-bottom: 1px solid transparent;
            transition: all .25s ease;
        }

        .yl-text-link:hover {
            color: #0b9389;
            border-bottom-color: #0b9389;
        }

        .yl-text-link i {
            transition: transform .25s ease;
        }

        .yl-text-link:hover i {
            transform: translateX(4px);
        }

        /* ===== 导航 ===== */
        .yl-navbar {
            background: rgba(10, 14, 20, .92);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            min-height: 72px;
            border-bottom: 1px solid rgba(255, 255, 255, .06);
            box-shadow: 0 1px 0 0 rgba(16, 197, 184, .12);
            position: relative;
            z-index: 1050;
        }

        .yl-navbar::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: linear-gradient(90deg, var(--yl-primary), var(--yl-secondary));
            z-index: 2;
        }

        .yl-navbar .navbar-brand {
            display: flex;
            align-items: center;
            font-size: 20px;
            font-weight: 900;
            color: #fff;
            letter-spacing: .02em;
        }

        .yl-navbar .navbar-brand:hover {
            color: var(--yl-primary);
        }

        .yl-brand-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--yl-primary), var(--yl-secondary));
            border-radius: 10px;
            color: #0A0E14;
            font-weight: 900;
            font-size: 18px;
            margin-right: 10px;
            flex-shrink: 0;
        }

        .yl-navbar .navbar-nav .nav-link {
            color: rgba(255, 255, 255, .75);
            font-size: 15px;
            font-weight: 500;
            padding: 24px 16px;
            position: relative;
            transition: color .25s ease;
        }

        .yl-navbar .navbar-nav .nav-link::after {
            content: '';
            position: absolute;
            left: 16px;
            right: 16px;
            bottom: 12px;
            height: 2px;
            background: var(--yl-primary);
            border-radius: 2px;
            opacity: 0;
            transform: scaleX(.4);
            transition: all .3s ease;
            box-shadow: 0 0 8px rgba(16, 197, 184, .6);
        }

        .yl-navbar .navbar-nav .nav-link:hover {
            color: var(--yl-primary);
        }

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

        .yl-navbar .navbar-nav .nav-link.active::after {
            opacity: 1;
            transform: scaleX(1);
        }

        .yl-nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            background: var(--yl-primary);
            color: #06241F;
            border-radius: var(--yl-radius-btn);
            font-weight: 700;
            font-size: 14px;
            transition: all .25s ease;
        }

        .yl-nav-cta:hover {
            background: #37D6C9;
            color: #06241F;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(16, 197, 184, .3);
        }

        .yl-navbar .navbar-toggler {
            border: none;
            color: #fff;
            font-size: 22px;
            padding: 4px 8px;
        }

        .yl-navbar .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(16, 197, 184, .4);
            color: var(--yl-primary);
        }

        @media (max-width: 991.98px) {
            .yl-navbar .navbar-nav .nav-link {
                padding: 14px 8px;
                border-bottom: 1px solid rgba(255, 255, 255, .05);
            }
            .yl-navbar .navbar-nav .nav-link::after {
                display: none;
            }
            .yl-navbar .navbar-collapse {
                background: rgba(10, 14, 20, .98);
                padding: 12px 0 20px;
                border-radius: 12px;
                margin-top: 12px;
            }
            .yl-nav-cta {
                margin-top: 12px;
                justify-content: center;
                width: 100%;
            }
        }

        /* ===== Hero ===== */
        .yl-cat-hero {
            position: relative;
            min-height: 60vh;
            display: flex;
            align-items: center;
            background: linear-gradient(0deg, rgba(10, 14, 20, .76), rgba(10, 14, 20, .42)), url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            color: #fff;
            padding: 140px 0 100px;
        }

        .yl-cat-hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 80px;
            background: linear-gradient(0deg, rgba(245, 244, 239, 1), transparent);
        }

        .yl-breadcrumb {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 13px;
            color: rgba(255, 255, 255, .6);
            margin-bottom: 18px;
        }

        .yl-breadcrumb a {
            color: rgba(255, 255, 255, .7);
            border-bottom: 1px solid transparent;
        }

        .yl-breadcrumb a:hover {
            color: var(--yl-primary);
            border-bottom-color: var(--yl-primary);
        }

        .yl-breadcrumb i {
            font-size: 10px;
            line-height: 1.6;
        }

        .yl-cat-hero h1 {
            font-size: clamp(2rem, 4vw, 3.2rem);
            font-weight: 900;
            margin-bottom: 14px;
            color: #fff;
        }

        .yl-cat-hero .yl-lead {
            font-size: clamp(1rem, 2vw, 1.25rem);
            color: rgba(255, 255, 255, .85);
            max-width: 680px;
            margin-bottom: 28px;
            line-height: 1.7;
        }

        .yl-hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 32px;
        }

        .yl-stat-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
            max-width: 760px;
            padding-top: 32px;
            border-top: 1px solid rgba(255, 255, 255, .15);
        }

        .yl-stat-item .yl-stat-num {
            font-size: clamp(1.6rem, 3vw, 2.2rem);
            font-weight: 900;
            color: var(--yl-primary);
            line-height: 1.2;
        }

        .yl-stat-item .yl-stat-label {
            font-size: 13px;
            color: rgba(255, 255, 255, .65);
            margin-top: 4px;
        }

        @media (max-width: 768px) {
            .yl-cat-hero {
                padding: 110px 0 80px;
            }
            .yl-stat-row {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 576px) {
            .yl-hero-actions .yl-btn {
                width: 100%;
            }
            .yl-cat-hero {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        /* ===== 品牌理念区 ===== */
        .yl-brand-intro {
            padding: var(--yl-section-pad) 0;
        }

        .yl-brand-intro .yl-intro-media {
            position: relative;
            border-radius: var(--yl-radius-card);
            overflow: hidden;
            height: 100%;
            min-height: 380px;
            box-shadow: var(--yl-shadow-card);
        }

        .yl-brand-intro .yl-intro-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .6s ease;
        }

        .yl-brand-intro .yl-intro-media:hover img {
            transform: scale(1.03);
        }

        .yl-brand-intro .yl-intro-media::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 100%;
            height: 50%;
            background: linear-gradient(0deg, rgba(10, 14, 20, .35), transparent);
        }

        .yl-intro-body {
            padding: 40px 24px;
        }

        .yl-intro-body .yl-eyebrow {
            font-size: 13px;
            font-weight: 700;
            letter-spacing: .1em;
            color: var(--yl-primary);
            margin-bottom: 12px;
            display: block;
        }

        .yl-intro-body h2 {
            font-size: clamp(1.6rem, 3vw, 2.4rem);
            font-weight: 900;
            margin-bottom: 18px;
        }

        .yl-intro-body p {
            color: var(--yl-text-muted);
            line-height: 1.8;
            margin-bottom: 18px;
        }

        .yl-intro-body .yl-intro-link {
            margin-top: 20px;
        }

        @media (max-width: 991.98px) {
            .yl-brand-intro .container>.row {
                flex-direction: column-reverse;
            }
            .yl-intro-body {
                padding: 32px 0 0;
            }
            .yl-brand-intro .yl-intro-media {
                min-height: 260px;
            }
        }

        /* ===== 时间线 ===== */
        .yl-journey {
            background: var(--yl-bg-dark);
            position: relative;
            overflow: hidden;
        }

        .yl-journey::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -120px;
            width: 320px;
            height: 320px;
            background: radial-gradient(circle, rgba(16, 197, 184, .18), transparent 70%);
            border-radius: 50%;
        }

        .yl-timeline {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 24px;
            position: relative;
            z-index: 1;
        }

        .yl-timeline-item {
            background: rgba(255, 255, 255, .03);
            border: 1px solid rgba(255, 255, 255, .06);
            border-radius: var(--yl-radius-card);
            padding: 32px 24px;
            position: relative;
            transition: border-color .3s ease, transform .3s ease;
        }

        .yl-timeline-item:hover {
            border-color: rgba(16, 197, 184, .4);
            transform: translateY(-4px);
        }

        .yl-timeline-item .yl-dot {
            width: 44px;
            height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--yl-primary), var(--yl-secondary));
            color: #0A0E14;
            font-size: 18px;
            font-weight: 900;
            border-radius: 12px;
            margin-bottom: 20px;
        }

        .yl-timeline-item h4 {
            color: #fff;
            font-size: 18px;
            margin-bottom: 10px;
            font-weight: 700;
        }

        .yl-timeline-item p {
            color: #A8B2BE;
            font-size: 14px;
            line-height: 1.7;
            margin-bottom: 0;
        }

        .yl-timeline-item .yl-phase {
            display: block;
            font-size: 12px;
            color: var(--yl-secondary);
            font-weight: 600;
            letter-spacing: .06em;
            margin-bottom: 6px;
        }

        @media (max-width: 991.98px) {
            .yl-timeline {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 576px) {
            .yl-timeline {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 核心价值 ===== */
        .yl-values {
            background: var(--yl-bg-light);
        }

        .yl-value-card {
            background: var(--yl-surface);
            border-radius: var(--yl-radius-card);
            padding: 32px 28px;
            height: 100%;
            border: 1px solid rgba(229, 232, 236, .6);
            box-shadow: var(--yl-shadow-card);
            transition: box-shadow .3s ease, transform .3s ease, border-color .3s ease;
            position: relative;
            overflow: hidden;
        }

        .yl-value-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 0;
            background: linear-gradient(90deg, var(--yl-primary), var(--yl-secondary));
            transition: height .35s ease;
        }

        .yl-value-card:hover {
            box-shadow: var(--yl-shadow-hover);
            transform: translateY(-4px);
            border-color: rgba(16, 197, 184, .35);
        }

        .yl-value-card:hover::before {
            height: 3px;
        }

        .yl-value-icon {
            width: 54px;
            height: 54px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(16, 197, 184, .1);
            color: var(--yl-primary);
            font-size: 22px;
            border-radius: 14px;
            margin-bottom: 22px;
            transition: background .3s ease, color .3s ease, transform .3s ease;
        }

        .yl-value-card:hover .yl-value-icon {
            background: var(--yl-primary);
            color: #0A0E14;
            transform: scale(1.05);
        }

        .yl-value-card h3 {
            font-size: 19px;
            font-weight: 800;
            margin-bottom: 10px;
        }

        .yl-value-card p {
            color: var(--yl-text-muted);
            font-size: 14px;
            line-height: 1.75;
            margin-bottom: 0;
        }

        /* ===== 故事卡 ===== */
        .yl-stories {
            background: var(--yl-bg-light);
            padding-bottom: var(--yl-section-pad);
        }

        .yl-story-card {
            background: var(--yl-surface);
            border-radius: var(--yl-radius-card);
            overflow: hidden;
            box-shadow: var(--yl-shadow-card);
            height: 100%;
            display: flex;
            flex-direction: column;
            border: 1px solid rgba(229, 232, 236, .6);
            transition: box-shadow .3s ease, transform .3s ease, border-color .3s ease;
        }

        .yl-story-card:hover {
            box-shadow: var(--yl-shadow-hover);
            transform: translateY(-4px);
            border-color: rgba(16, 197, 184, .3);
        }

        .yl-story-media {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 9;
        }

        .yl-story-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s ease;
        }

        .yl-story-card:hover .yl-story-media img {
            transform: scale(1.04);
        }

        .yl-story-media::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 55%, rgba(10, 14, 20, .25));
        }

        .yl-story-body {
            padding: 26px 26px 24px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .yl-story-body h3 {
            font-size: clamp(1.05rem, 1.6vw, 1.35rem);
            font-weight: 800;
            line-height: 1.45;
            margin-bottom: 10px;
        }

        .yl-story-body h3 a {
            color: var(--yl-text-main);
            transition: color .25s ease;
        }

        .yl-story-body h3 a:hover {
            color: var(--yl-primary);
        }

        .yl-story-body p {
            color: var(--yl-text-muted);
            font-size: 14px;
            line-height: 1.75;
            flex: 1;
            margin-bottom: 18px;
        }

        .yl-story-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            border-top: 1px solid var(--yl-border);
            padding-top: 16px;
            margin-top: auto;
        }

        .yl-story-meta .yl-date {
            font-size: 13px;
            color: var(--yl-text-muted);
        }

        .yl-story-meta .yl-date i {
            margin-right: 5px;
            font-size: 11px;
        }

        .yl-story-grid .row {
            align-items: stretch;
        }

        @media (max-width: 767.98px) {
            .yl-story-body {
                padding: 20px;
            }
        }

        /* ===== 合作伙伴 ===== */
        .yl-trust {
            background: #EEEBE4;
            border-top: 1px solid rgba(10, 14, 20, .04);
            border-bottom: 1px solid rgba(10, 14, 20, .04);
        }

        .yl-trust-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 0;
            border: 1px solid rgba(10, 14, 20, .08);
            background: rgba(255, 255, 255, .4);
        }

        .yl-trust-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 10px;
            padding: 40px 24px;
            border-right: 1px solid rgba(10, 14, 20, .06);
            border-bottom: 1px solid rgba(10, 14, 20, .06);
            color: var(--yl-text-muted);
            font-size: 14px;
            font-weight: 600;
            transition: background .3s ease, color .3s ease;
            text-align: center;
        }

        .yl-trust-item:nth-child(3n) {
            border-right: none;
        }

        .yl-trust-item:nth-last-child(-n+3) {
            border-bottom: none;
        }

        .yl-trust-item:hover {
            background: rgba(16, 197, 184, .08);
            color: var(--yl-text-main);
        }

        .yl-trust-item i {
            font-size: 28px;
            color: var(--yl-primary);
            opacity: .6;
            transition: opacity .3s ease;
        }

        .yl-trust-item:hover i {
            opacity: 1;
        }

        @media (max-width: 768px) {
            .yl-trust-grid {
                grid-template-columns: repeat(2, 1fr);
                border: none;
                gap: 0;
            }
            .yl-trust-item {
                border: 1px solid rgba(10, 14, 20, .06);
                padding: 28px 16px;
            }
        }

        /* ===== FAQ ===== */
        .yl-faq {
            background: var(--yl-bg-light);
        }

        .yl-accordion .accordion-item {
            background: transparent;
            border: none;
            border-bottom: 1px solid var(--yl-border);
            margin-bottom: 0;
            border-radius: 0;
        }

        .yl-accordion .accordion-button {
            background: transparent;
            color: var(--yl-text-main);
            font-weight: 600;
            font-size: 16px;
            padding: 22px 16px;
            box-shadow: none;
            border: none;
            position: relative;
            transition: color .25s ease, padding-left .3s ease;
        }

        .yl-accordion .accordion-button::after {
            background-image: none;
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            content: '\f078';
            color: var(--yl-primary);
            font-size: 14px;
            transition: transform .3s ease;
        }

        .yl-accordion .accordion-button:not(.collapsed) {
            color: var(--yl-primary);
            background: transparent;
            padding-left: 18px;
            box-shadow: inset 3px 0 0 var(--yl-primary);
        }

        .yl-accordion .accordion-button:not(.collapsed)::after {
            transform: rotate(180deg);
            color: var(--yl-primary);
        }

        .yl-accordion .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(16, 197, 184, .15);
            border-radius: 8px;
        }

        .yl-accordion .accordion-body {
            padding: 0 16px 22px 18px;
            color: var(--yl-text-muted);
            line-height: 1.8;
            font-size: 15px;
        }

        /* ===== CTA ===== */
        .yl-cta {
            background: linear-gradient(0deg, rgba(10, 14, 20, .88), rgba(10, 14, 20, .65)), url('/assets/images/backpic/back-3.webp') center center / cover no-repeat;
            padding: var(--yl-section-pad) 0;
            color: #fff;
            position: relative;
            overflow: hidden;
        }

        .yl-cta::before {
            content: '';
            position: absolute;
            bottom: -160px;
            left: 10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(16, 197, 184, .2), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .yl-cta-inner {
            position: relative;
            z-index: 1;
            text-align: center;
            max-width: 680px;
            margin: 0 auto;
        }

        .yl-cta h2 {
            font-size: clamp(1.6rem, 3vw, 2.4rem);
            font-weight: 900;
            margin-bottom: 14px;
            color: #fff;
        }

        .yl-cta p {
            color: rgba(255, 255, 255, .8);
            margin-bottom: 28px;
        }

        .yl-cta-form {
            display: flex;
            gap: 0;
            max-width: 480px;
            margin: 0 auto 20px;
            background: rgba(255, 255, 255, .08);
            border: 1px solid rgba(255, 255, 255, .18);
            border-radius: var(--yl-radius-btn);
            padding: 6px 6px 6px 20px;
            align-items: center;
            transition: border-color .3s ease, box-shadow .3s ease;
        }

        .yl-cta-form:focus-within {
            border-color: var(--yl-primary);
            box-shadow: 0 0 0 4px rgba(16, 197, 184, .15);
        }

        .yl-cta-form input {
            flex: 1;
            background: transparent;
            border: none;
            color: #fff;
            font-size: 15px;
            outline: none;
            line-height: 1.5;
        }

        .yl-cta-form input::placeholder {
            color: rgba(255, 255, 255, .45);
        }

        .yl-cta-form .yl-btn {
            padding: 10px 24px;
            margin: 0;
            white-space: nowrap;
        }

        @media (max-width: 576px) {
            .yl-cta-form {
                flex-direction: column;
                background: transparent;
                border: none;
                padding: 0;
                gap: 12px;
                box-shadow: none;
            }
            .yl-cta-form input {
                background: rgba(255, 255, 255, .08);
                border: 1px solid rgba(255, 255, 255, .18);
                border-radius: var(--yl-radius-btn);
                padding: 12px 18px;
                width: 100%;
            }
            .yl-cta-form .yl-btn {
                width: 100%;
            }
        }

        /* ===== 页脚 ===== */
        .yl-footer {
            background: var(--yl-bg-dark);
            color: #8A94A0;
            padding: 70px 0 0;
            border-top: 1px solid rgba(255, 255, 255, .04);
        }

        .yl-footer h5 {
            color: rgba(255, 255, 255, .85);
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 18px;
        }

        .yl-footer-logo {
            display: flex;
            align-items: center;
            font-size: 20px;
            font-weight: 900;
            color: #fff;
            letter-spacing: .02em;
        }

        .yl-footer-links {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .yl-footer-links a {
            color: #8A94A0;
            font-size: 14px;
            line-height: 32px;
            transition: color .25s ease, padding-left .25s ease;
        }

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

        .yl-footer-contact {
            font-size: 14px;
            line-height: 32px;
        }

        .yl-footer-contact li i {
            width: 20px;
            color: var(--yl-primary);
            font-size: 13px;
        }

        .yl-footer-bottom {
            margin-top: 52px;
            border-top: 1px solid rgba(255, 255, 255, .06);
            padding: 24px 0;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            font-size: 14px;
            color: #6B7684;
        }

        .yl-footer-copyright {
            font-size: 14px;
        }

        @media (max-width: 768px) {
            .yl-footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== 响应式通用 ===== */
        @media (max-width: 991.98px) {
            .yl-section {
                --yl-section-pad: 64px;
            }
        }

        @media (max-width: 576px) {
            .yl-section {
                --yl-section-pad: 48px;
            }
        }