/* roulang page: index */
:root {
            --teal: #1F8A8C;
            --teal-dark: #156568;
            --mute-teal: #3E7B7C;
            --sand: #F4E9DC;
            --pearl: #FBF9F5;
            --white: #FFFFFF;
            --ink: #2B3538;
            --gray-green: #5C6B6E;
            --rust: #C75B3A;
            --copper: #A67C52;
            --bg-deep: #1E2A2D;
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-tag: 4px;
            --shadow-card: 0 2px 8px rgba(43, 53, 56, 0.06);
            --shadow-hover: 0 12px 28px rgba(43, 53, 56, 0.12);
            --font-sans: "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(--font-sans);
            background: var(--pearl);
            color: var(--ink);
            line-height: 1.7;
            font-size: 15px;
            -webkit-font-smoothing: antialiased;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color .2s ease;
        }
        img {
            max-width: 100%;
            display: block;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
            font-family: inherit;
        }
        .container {
            max-width: 1200px;
            width: 100%;
            margin: 0 auto;
            padding: 0 32px;
        }

        /* ===== Left Nav Desktop ===== */
        .left-nav {
            position: fixed;
            top: 0;
            left: 0;
            width: 260px;
            height: 100vh;
            background: var(--bg-deep);
            z-index: 100;
            display: flex;
            flex-direction: column;
            padding: 32px 24px 24px;
            transition: transform .3s ease, width .3s ease;
        }
        .left-nav .brand {
            display: flex;
            align-items: center;
            gap: 12px;
            padding-bottom: 28px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        .left-nav .brand-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: var(--teal);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
            font-weight: 700;
            flex-shrink: 0;
        }
        .left-nav .brand-text h2 {
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            letter-spacing: .5px;
            white-space: nowrap;
        }
        .left-nav .brand-text span {
            color: rgba(255, 255, 255, 0.5);
            font-size: 11px;
            display: block;
            margin-top: 2px;
            white-space: nowrap;
        }
        .left-nav .nav-list {
            list-style: none;
            margin-top: 24px;
            flex: 1;
        }
        .left-nav .nav-list li {
            margin-bottom: 6px;
        }
        .left-nav .nav-list a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: 10px;
            color: rgba(255, 255, 255, 0.75);
            font-size: 14px;
            font-weight: 500;
            transition: all .25s ease;
            position: relative;
        }
        .left-nav .nav-list a:hover {
            background: rgba(31, 138, 140, 0.15);
            color: #fff;
        }
        .left-nav .nav-list a.active {
            background: var(--teal);
            color: #fff;
            font-weight: 600;
            box-shadow: 0 4px 14px rgba(31, 138, 140, 0.3);
        }
        .left-nav .nav-list a i {
            width: 18px;
            text-align: center;
            font-size: 15px;
        }
        .left-nav .nav-foot {
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: rgba(255, 255, 255, 0.4);
            font-size: 12px;
            line-height: 1.8;
        }

        /* ===== Main Content Area ===== */
        .main-wrap {
            margin-left: 260px;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        /* ===== Top Bar Mobile ===== */
        .top-bar {
            display: none;
            position: sticky;
            top: 0;
            z-index: 99;
            background: var(--bg-deep);
            padding: 14px 20px;
            align-items: center;
            justify-content: space-between;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
        }
        .top-bar .brand-mobile {
            display: flex;
            align-items: center;
            gap: 10px;
            color: #fff;
            font-weight: 700;
            font-size: 15px;
        }
        .top-bar .brand-mobile .brand-icon {
            width: 32px;
            height: 32px;
            border-radius: 8px;
            background: var(--teal);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            font-weight: 700;
            color: #fff;
        }
        .hamburger {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 8px;
            color: #fff;
            font-size: 20px;
            transition: background .2s;
        }
        .hamburger:hover {
            background: rgba(255, 255, 255, 0.1);
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 72vh;
            display: flex;
            align-items: center;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            isolation: isolate;
            padding: 80px 0;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(30, 42, 45, 0.88) 0%, rgba(30, 42, 45, 0.55) 60%, rgba(31, 138, 140, 0.25) 100%);
            z-index: -1;
        }
        .hero-content {
            max-width: 600px;
            position: relative;
            z-index: 1;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(31, 138, 140, 0.2);
            border: 1px solid rgba(31, 138, 140, 0.4);
            color: #7ecfcf;
            padding: 6px 16px;
            border-radius: 40px;
            font-size: 13px;
            font-weight: 500;
            margin-bottom: 24px;
            backdrop-filter: blur(4px);
        }
        .hero h1 {
            font-size: 38px;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            letter-spacing: 1px;
            margin-bottom: 20px;
        }
        .hero p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 16px;
            line-height: 1.8;
            margin-bottom: 32px;
        }
        .hero-btns {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--teal);
            color: #fff;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            line-height: 1.2;
            transition: all .2s ease;
            box-shadow: 0 4px 14px rgba(31, 138, 140, 0.3);
            min-height: 44px;
        }
        .btn-primary:hover {
            background: var(--teal-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(31, 138, 140, 0.4);
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: #fff;
            border: 1.5px solid rgba(255, 255, 255, 0.6);
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 500;
            line-height: 1.2;
            transition: all .2s ease;
            min-height: 44px;
        }
        .btn-secondary:hover {
            border-color: var(--sand);
            background: rgba(244, 233, 220, 0.1);
            transform: translateY(-2px);
        }

        /* ===== Section Common ===== */
        .section {
            padding: 72px 0;
        }
        .section-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--teal);
            letter-spacing: 1px;
            text-transform: uppercase;
            margin-bottom: 8px;
            background: rgba(31, 138, 140, 0.08);
            padding: 4px 14px;
            border-radius: 30px;
        }
        .section-title {
            font-size: 26px;
            font-weight: 700;
            color: var(--ink);
            line-height: 1.3;
            margin-bottom: 12px;
        }
        .section-desc {
            font-size: 15px;
            color: var(--gray-green);
            max-width: 600px;
            line-height: 1.7;
        }
        .section-head {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            margin-bottom: 36px;
        }
        .text-link {
            color: var(--teal);
            font-weight: 600;
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap .2s;
        }
        .text-link:hover {
            gap: 10px;
            color: var(--teal-dark);
        }

        /* ===== Feature Grid ===== */
        .feature-grid {
            display: grid;
            grid-template-columns: 1.2fr 1fr;
            grid-template-rows: repeat(2, 1fr);
            gap: 24px;
            min-height: 420px;
        }
        .feature-card {
            background: var(--white);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            transition: box-shadow .3s ease, transform .3s ease;
            position: relative;
        }
        .feature-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .feature-card .card-img {
            overflow: hidden;
            flex-shrink: 0;
        }
        .feature-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .4s ease;
        }
        .feature-card:hover .card-img img {
            transform: scale(1.03);
        }
        .feature-card .card-body {
            padding: 22px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .feature-card .card-tags {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
            margin-bottom: 10px;
        }
        .feature-card .tag {
            display: inline-block;
            background: rgba(31, 138, 140, 0.1);
            color: var(--teal);
            font-size: 12px;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: var(--radius-tag);
        }
        .feature-card .tag-warm {
            background: rgba(199, 91, 58, 0.1);
            color: var(--rust);
        }
        .feature-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .feature-card p {
            font-size: 14px;
            color: var(--gray-green);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex: 1;
        }
        .feature-card .card-link {
            margin-top: 16px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--teal);
            font-weight: 600;
            font-size: 14px;
            transition: gap .2s;
        }
        .feature-card .card-link:hover {
            gap: 10px;
        }
        .feature-card.feature-main {
            grid-row: span 2;
            flex-direction: column;
        }
        .feature-card.feature-main .card-img {
            height: 220px;
        }
        .feature-card.feature-sub .card-img {
            height: 110px;
        }

        /* ===== Testimonial Slider ===== */
        .testimonial-section {
            background: var(--sand);
        }
        .testimonial-slider-wrap {
            position: relative;
            overflow: hidden;
        }
        .testimonial-track {
            display: flex;
            gap: 24px;
            overflow-x: auto;
            scroll-snap-type: x mandatory;
            padding: 8px 4px 24px;
            scrollbar-width: none;
        }
        .testimonial-track::-webkit-scrollbar {
            display: none;
        }
        .testimonial-card {
            flex: 0 0 360px;
            background: var(--white);
            border-radius: var(--radius-card);
            padding: 28px;
            scroll-snap-align: start;
            box-shadow: var(--shadow-card);
            transition: box-shadow .3s ease;
        }
        .testimonial-card:hover {
            box-shadow: var(--shadow-hover);
        }
        .testimonial-card .stars {
            color: var(--rust);
            font-size: 14px;
            letter-spacing: 2px;
            margin-bottom: 14px;
        }
        .testimonial-card blockquote {
            font-size: 15px;
            line-height: 1.8;
            color: var(--ink);
            margin-bottom: 20px;
            font-style: normal;
        }
        .testimonial-card .person {
            display: flex;
            align-items: center;
            gap: 12px;
            border-top: 1px solid rgba(43, 53, 56, 0.06);
            padding-top: 16px;
        }
        .testimonial-card .avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--teal);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 15px;
            flex-shrink: 0;
        }
        .testimonial-card .person-info {
            line-height: 1.3;
        }
        .testimonial-card .person-info .name {
            font-size: 14px;
            font-weight: 600;
            color: var(--ink);
        }
        .testimonial-card .person-info .src {
            font-size: 12px;
            color: var(--gray-green);
        }
        .slider-controls {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-top: 16px;
        }
        .slider-arrows {
            display: flex;
            gap: 12px;
        }
        .slider-btn {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            border: 1.5px solid rgba(31, 138, 140, 0.4);
            color: var(--teal);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all .2s ease;
            background: transparent;
        }
        .slider-btn:hover {
            background: var(--teal);
            color: #fff;
            border-color: var(--teal);
            transform: translateY(-2px);
        }
        .slider-dots {
            display: flex;
            gap: 6px;
            align-items: center;
        }
        .slider-dots .dot {
            width: 20px;
            height: 3px;
            border-radius: 2px;
            background: rgba(31, 138, 140, 0.2);
            transition: all .3s ease;
            border: none;
            padding: 0;
        }
        .slider-dots .dot.active {
            background: var(--teal);
            width: 32px;
        }

        /* ===== Assurance Bar ===== */
        .assure-bar {
            background: var(--sand);
            border-top: 1px solid rgba(31, 138, 140, 0.1);
            border-bottom: 1px solid rgba(31, 138, 140, 0.1);
            padding: 32px 0;
        }
        .assure-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .assure-item {
            display: flex;
            align-items: center;
            gap: 14px;
        }
        .assure-item .icon {
            width: 44px;
            height: 44px;
            border-radius: 10px;
            background: var(--white);
            border: 1.5px solid rgba(31, 138, 140, 0.2);
            color: var(--teal);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 17px;
            flex-shrink: 0;
        }
        .assure-item .text {
            font-size: 14px;
            font-weight: 600;
            color: var(--ink);
            line-height: 1.4;
        }
        .assure-item .text span {
            display: block;
            font-weight: 400;
            font-size: 12px;
            color: var(--gray-green);
        }

        /* ===== CMS List ===== */
        .cms-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .cms-item {
            display: flex;
            align-items: center;
            gap: 20px;
            padding: 20px 24px;
            background: var(--white);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            transition: all .25s ease;
            border-left: 3px solid transparent;
        }
        .cms-item:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
            border-left-color: var(--teal);
        }
        .cms-item .thumb {
            width: 90px;
            height: 70px;
            border-radius: 8px;
            overflow: hidden;
            flex-shrink: 0;
            background: var(--sand);
        }
        .cms-item .thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .cms-item .info {
            flex: 1;
            min-width: 0;
        }
        .cms-item .meta {
            font-size: 12px;
            color: var(--gray-green);
            display: flex;
            gap: 12px;
            margin-bottom: 4px;
            flex-wrap: wrap;
        }
        .cms-item .meta .cat {
            color: var(--teal);
            font-weight: 600;
        }
        .cms-item h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--ink);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            margin-bottom: 4px;
            line-height: 1.4;
        }
        .cms-item p {
            font-size: 14px;
            color: var(--gray-green);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .cms-item .arrow-link {
            color: var(--teal);
            font-size: 18px;
            flex-shrink: 0;
            transition: transform .2s ease;
        }
        .cms-item:hover .arrow-link {
            transform: translateX(6px);
        }
        .cms-empty {
            background: var(--sand);
            border: 1.5px dashed rgba(31, 138, 140, 0.25);
            border-radius: var(--radius-card);
            padding: 48px 24px;
            text-align: center;
            color: var(--gray-green);
            font-size: 15px;
        }
        .cms-empty i {
            font-size: 28px;
            color: var(--teal);
            display: block;
            margin-bottom: 12px;
            opacity: 0.6;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            margin-bottom: 12px;
            border-radius: var(--radius-card);
            background: var(--white);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: box-shadow .3s ease;
        }
        .faq-item:hover {
            box-shadow: var(--shadow-hover);
        }
        .faq-item.open {
            box-shadow: var(--shadow-hover);
        }
        .faq-question {
            width: 100%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--ink);
            text-align: left;
            transition: color .2s;
        }
        .faq-question:hover {
            color: var(--teal);
        }
        .faq-question .icon {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            border: 1.5px solid rgba(31, 138, 140, 0.3);
            color: var(--teal);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            transition: all .3s ease;
            flex-shrink: 0;
        }
        .faq-item.open .faq-question .icon {
            background: var(--teal);
            color: #fff;
            transform: rotate(45deg);
            border-color: var(--teal);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .3s ease;
        }
        .faq-answer .inner {
            padding: 0 24px 20px;
            font-size: 15px;
            color: var(--gray-green);
            line-height: 1.8;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--bg-deep);
            background-image: url('/assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            position: relative;
            isolation: isolate;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(30, 42, 45, 0.95) 0%, rgba(30, 42, 45, 0.75) 100%);
            z-index: -1;
        }
        .cta-inner {
            text-align: center;
            padding: 80px 32px;
            position: relative;
            z-index: 1;
        }
        .cta-inner h2 {
            color: #fff;
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 14px;
        }
        .cta-inner p {
            color: rgba(255, 255, 255, 0.7);
            font-size: 16px;
            max-width: 560px;
            margin: 0 auto 32px;
            line-height: 1.8;
        }
        .btn-sand {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--sand);
            color: var(--ink);
            padding: 14px 36px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 700;
            transition: all .2s ease;
            min-height: 48px;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
        }
        .btn-sand:hover {
            background: #ecdcc8;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-deep);
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand h3 {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.5);
            max-width: 260px;
        }
        .footer-col h4 {
            font-size: 14px;
            color: #fff;
            margin-bottom: 16px;
            font-weight: 600;
            letter-spacing: .5px;
        }
        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-col ul a {
            color: rgba(255, 255, 255, 0.55);
            font-size: 14px;
            transition: color .2s ease;
        }
        .footer-col ul a:hover {
            color: var(--sand);
        }
        .footer-col ul a i {
            margin-right: 6px;
            font-size: 12px;
        }
        .footer-bottom {
            padding: 20px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.35);
        }
        .footer-bottom .icp a {
            color: rgba(255, 255, 255, 0.35);
        }
        .footer-bottom .icp a:hover {
            color: var(--sand);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1023px) {
            .left-nav {
                transform: translateX(-100%);
                width: 260px;
            }
            .left-nav.open {
                transform: translateX(0);
            }
            .main-wrap {
                margin-left: 0;
            }
            .top-bar {
                display: flex;
            }
            .nav-overlay {
                display: none;
                position: fixed;
                inset: 0;
                background: rgba(30, 42, 45, 0.5);
                z-index: 99;
            }
            .nav-overlay.show {
                display: block;
            }
            .assure-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .feature-grid {
                grid-template-columns: 1fr;
                grid-template-rows: auto;
            }
            .feature-card.feature-main {
                grid-row: auto;
            }
            .feature-card.feature-main .card-img {
                height: 180px;
            }
            .feature-card.feature-sub .card-img {
                height: 140px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }
        @media (max-width: 767px) {
            .section {
                padding: 56px 0;
            }
            .container {
                padding: 0 20px;
            }
            .hero {
                min-height: 62vh;
                padding: 60px 0;
            }
            .hero h1 {
                font-size: 30px;
            }
            .hero p {
                font-size: 15px;
            }
            .hero-btns {
                flex-direction: column;
                align-items: stretch;
            }
            .btn-primary,
            .btn-secondary {
                justify-content: center;
                text-align: center;
            }
            .section-title {
                font-size: 21px;
            }
            .section-desc {
                font-size: 14px;
            }
            .testimonial-card {
                flex-basis: 280px;
                padding: 22px;
            }
            .assure-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .assure-item {
                flex-direction: column;
                text-align: center;
                gap: 8px;
            }
            .cms-item {
                flex-wrap: wrap;
                padding: 16px;
            }
            .cms-item .thumb {
                width: 100%;
                height: 130px;
                margin-right: 0;
            }
            .cms-item .info {
                flex-basis: 100%;
            }
            .cms-item h3 {
                white-space: normal;
                line-height: 1.4;
            }
            .cms-item p {
                white-space: normal;
                display: -webkit-box;
                -webkit-line-clamp: 2;
                -webkit-box-orient: vertical;
                overflow: hidden;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .faq-question {
                font-size: 15px;
                padding: 16px 18px;
            }
            .cta-inner {
                padding: 60px 20px;
            }
            .cta-inner h2 {
                font-size: 24px;
            }
        }
        @media (max-width: 480px) {
            .assure-grid {
                grid-template-columns: 1fr;
            }
        }

/* roulang page: category1 */
:root {
            --teal: #1F8A8C;
            --teal-dark: #156568;
            --teal-deep: #0F4A4C;
            --sand: #F4E9DC;
            --sand-light: #FAF3EA;
            --bg: #FBF9F5;
            --card: #FFFFFF;
            --ink: #2B3538;
            --ink-soft: #5C6B6E;
            --rust: #C75B3A;
            --copper: #A67C52;
            --radius-lg: 12px;
            --radius-md: 8px;
            --radius-sm: 4px;
            --shadow-card: 0 2px 8px rgba(43, 53, 56, 0.06);
            --shadow-hover: 0 12px 28px rgba(43, 53, 56, 0.12);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            background-color: var(--bg);
            color: var(--ink);
            line-height: 1.7;
            font-size: 15px;
            -webkit-font-smoothing: antialiased;
        }

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

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

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 32px;
            padding-right: 32px;
        }

        /* ===== Left Navigation ===== */
        .site-nav {
            position: fixed;
            top: 0;
            left: 0;
            width: 260px;
            height: 100vh;
            background: #EDEAE3;
            border-right: 1px solid #DEE0DB;
            display: flex;
            flex-direction: column;
            z-index: 100;
            transition: transform 0.3s ease;
        }

        .nav-brand {
            padding: 28px 24px 22px;
            border-bottom: 1px solid rgba(43, 53, 56, 0.08);
        }

        .nav-brand a {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .brand-icon {
            width: 42px;
            height: 42px;
            background: linear-gradient(135deg, var(--teal) 0%, var(--teal-dark) 100%);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
            font-weight: 700;
            flex-shrink: 0;
            letter-spacing: -0.5px;
            box-shadow: 0 4px 12px rgba(31, 138, 140, 0.25);
        }

        .brand-text {
            font-size: 18px;
            font-weight: 700;
            color: var(--ink);
            letter-spacing: 1px;
            line-height: 1.3;
        }

        .brand-sub {
            font-size: 12px;
            color: var(--ink-soft);
            margin-top: 2px;
            letter-spacing: 0.3px;
        }

        .nav-links {
            padding: 18px 14px;
            display: flex;
            flex-direction: column;
            gap: 4px;
            flex: 1;
            overflow-y: auto;
        }

        .nav-links a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 14px;
            border-radius: var(--radius-md);
            font-size: 15px;
            font-weight: 500;
            color: var(--ink);
            transition: background 0.2s, color 0.2s, transform 0.2s;
            position: relative;
        }

        .nav-links a i {
            width: 20px;
            text-align: center;
            font-size: 15px;
            color: var(--ink-soft);
            transition: color 0.2s;
        }

        .nav-links a:hover {
            background: rgba(31, 138, 140, 0.08);
            color: var(--teal-dark);
        }

        .nav-links a:hover i {
            color: var(--teal);
        }

        .nav-links a.active {
            background: var(--teal);
            color: #fff;
            box-shadow: 0 4px 14px rgba(31, 138, 140, 0.24);
        }

        .nav-links a.active i {
            color: #fff;
        }

        .nav-links a.active::after {
            content: '';
            position: absolute;
            right: 10px;
            width: 6px;
            height: 6px;
            background: rgba(255, 255, 255, 0.7);
            border-radius: 50%;
        }

        .nav-links a::before {
            content: '';
            position: absolute;
            bottom: 0;
            left: 14px;
            width: 0;
            height: 2px;
            background: var(--teal);
            transition: width 0.25s ease;
            border-radius: 2px;
        }

        .nav-links a:not(.active):hover::before {
            width: calc(100% - 28px);
        }

        .nav-footer {
            padding: 18px 24px;
            border-top: 1px solid rgba(43, 53, 56, 0.08);
        }

        .nav-footer p {
            font-size: 13px;
            color: var(--ink-soft);
            line-height: 1.6;
            margin-bottom: 4px;
        }

        .nav-footer .nav-copyright {
            font-size: 12px;
            color: rgba(92, 107, 110, 0.8);
        }

        /* ===== Mobile Topbar ===== */
        .mobile-topbar {
            display: none;
        }

        .hamburger {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-md);
            align-items: center;
            justify-content: center;
            background: transparent;
            color: var(--ink);
            font-size: 18px;
            transition: background 0.2s;
        }

        .hamburger:hover {
            background: rgba(31, 138, 140, 0.08);
        }

        /* ===== Main Layout ===== */
        .main-wrapper {
            margin-left: 260px;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        .content-area {
            flex: 1;
            background: var(--bg);
        }

        /* ===== Category Hero (compact) ===== */
        .category-hero {
            padding: 64px 0 28px;
            background: var(--bg);
            position: relative;
            overflow: hidden;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            top: 0;
            right: -120px;
            width: 340px;
            height: 340px;
            background: radial-gradient(circle, rgba(31, 138, 140, 0.06) 0%, transparent 70%);
            border-radius: 50%;
        }

        .breadcrumb {
            font-size: 13px;
            color: var(--ink-soft);
            margin-bottom: 18px;
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }

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

        .breadcrumb i {
            font-size: 10px;
            color: #B9C0BE;
        }

        .category-hero h1 {
            font-size: 32px;
            font-weight: 700;
            color: var(--ink);
            letter-spacing: 1px;
            line-height: 1.3;
            margin-bottom: 12px;
        }

        .category-hero h1 span {
            color: var(--teal);
        }

        .category-hero .hero-desc {
            font-size: 16px;
            color: var(--ink-soft);
            max-width: 600px;
            line-height: 1.8;
        }

        /* ===== Section Block ===== */
        .block {
            padding: 48px 0;
        }

        .block-alt {
            background: #F5F1EA;
        }

        .block-heading {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-bottom: 32px;
        }

        .block-heading .line {
            width: 4px;
            height: 26px;
            background: var(--teal);
            border-radius: 4px;
        }

        .block-heading h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--ink);
            letter-spacing: 0.5px;
        }

        .block-heading .sub {
            font-size: 14px;
            color: var(--ink-soft);
            margin-left: auto;
        }

        .heading-more a {
            font-size: 14px;
            color: var(--teal);
            font-weight: 500;
            transition: color 0.2s;
        }

        .heading-more a:hover {
            color: var(--teal-dark);
        }

        /* ===== Service Cards Grid (non-symmetric) ===== */
        .service-grid {
            display: grid;
            grid-template-columns: 1.15fr 1fr;
            gap: 24px;
        }

        .service-card {
            background: var(--card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            display: flex;
            flex-direction: column;
            border: 1px solid rgba(43, 53, 56, 0.04);
        }

        .service-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }

        .service-card .card-img {
            position: relative;
            overflow: hidden;
            height: 220px;
            flex-shrink: 0;
        }

        .service-card:nth-child(1) .card-img {
            height: 260px;
        }

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

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

        .card-img::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 55%, rgba(43, 53, 56, 0.25) 100%);
        }

        .card-body {
            padding: 24px 24px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .card-tags {
            display: flex;
            gap: 8px;
            margin-bottom: 12px;
            flex-wrap: wrap;
        }

        .tag {
            font-size: 12px;
            font-weight: 500;
            padding: 3px 10px;
            border-radius: var(--radius-sm);
            background: rgba(31, 138, 140, 0.08);
            color: var(--teal-dark);
            letter-spacing: 0.3px;
        }

        .tag-warm {
            background: var(--sand);
            color: var(--copper);
        }

        .service-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--ink);
            line-height: 1.4;
            margin-bottom: 8px;
        }

        .service-card .desc {
            font-size: 14px;
            color: var(--ink-soft);
            line-height: 1.65;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 16px;
        }

        .card-link {
            margin-top: auto;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 500;
            color: var(--teal);
            transition: gap 0.2s, color 0.2s;
        }

        .card-link:hover {
            gap: 10px;
            color: var(--teal-dark);
        }

        .card-link i {
            font-size: 12px;
        }

        .card-fit {
            padding: 20px 24px;
            background: var(--sand-light);
            border-radius: var(--radius-lg);
            border: 1px solid rgba(166, 124, 82, 0.12);
            margin-top: 16px;
        }

        .card-fit h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--ink);
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .card-fit h4 i {
            color: var(--copper);
            font-size: 14px;
        }

        .card-fit ul {
            list-style: none;
            padding: 0;
        }

        .card-fit ul li {
            font-size: 14px;
            color: var(--ink-soft);
            padding: 4px 0;
            padding-left: 18px;
            position: relative;
            line-height: 1.6;
        }

        .card-fit ul li::before {
            content: '';
            position: absolute;
            left: 0;
            top: 12px;
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--teal);
            opacity: 0.6;
        }

        /* ===== Application Scenarios ===== */
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .scenario-card {
            background: var(--card);
            border-radius: var(--radius-lg);
            padding: 32px 26px;
            text-align: center;
            box-shadow: var(--shadow-card);
            transition: transform 0.3s, box-shadow 0.3s;
            border: 1px solid rgba(43, 53, 56, 0.04);
        }

        .scenario-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

        .scenario-icon {
            width: 56px;
            height: 56px;
            border-radius: 16px;
            background: rgba(31, 138, 140, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            color: var(--teal);
            font-size: 22px;
        }

        .scenario-card h3 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 10px;
            color: var(--ink);
        }

        .scenario-card p {
            font-size: 14px;
            color: var(--ink-soft);
            line-height: 1.7;
        }

        /* ===== Process Steps ===== */
        .process-wrap {
            background: #FFFFFF;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            padding: 40px 40px;
            border: 1px solid rgba(43, 53, 56, 0.04);
        }

        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }

        .process-steps::before {
            content: '';
            position: absolute;
            top: 28px;
            left: 8%;
            right: 8%;
            height: 2px;
            background: linear-gradient(90deg, var(--teal) 0%, rgba(31, 138, 140, 0.2) 100%);
            border-radius: 2px;
        }

        .process-step {
            position: relative;
            text-align: center;
            padding-top: 20px;
        }

        .step-num {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--teal);
            color: #fff;
            font-size: 20px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            box-shadow: 0 4px 14px rgba(31, 138, 140, 0.3);
            position: relative;
            z-index: 1;
            border: 4px solid #fff;
        }

        .process-step h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--ink);
            margin-bottom: 6px;
        }

        .process-step p {
            font-size: 13px;
            color: var(--ink-soft);
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 860px;
            margin: 0 auto;
        }

        .faq-item {
            border: 1px solid rgba(43, 53, 56, 0.08);
            border-radius: var(--radius-lg);
            margin-bottom: 12px;
            overflow: hidden;
            background: var(--card);
            transition: border-color 0.3s, box-shadow 0.3s;
        }

        .faq-item.open {
            border-color: rgba(31, 138, 140, 0.3);
            box-shadow: var(--shadow-card);
        }

        .faq-question {
            width: 100%;
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            font-size: 16px;
            font-weight: 600;
            color: var(--ink);
            text-align: left;
            transition: color 0.2s;
            border-radius: var(--radius-lg);
        }

        .faq-question:hover {
            color: var(--teal-dark);
        }

        .faq-question .faq-icon {
            font-size: 14px;
            color: var(--teal);
            transition: transform 0.3s;
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(31, 138, 140, 0.08);
            border-radius: 50%;
        }

        .faq-item.open .faq-icon {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
        }

        .faq-answer p {
            padding: 0 24px 20px;
            font-size: 15px;
            color: var(--ink-soft);
            line-height: 1.8;
            border-top: 1px solid rgba(43, 53, 56, 0.04);
            padding-top: 14px;
            margin: 0 24px 20px;
            padding: 14px 0 0;
            margin: 0;
        }

        .faq-answer p {
            margin: 0;
            padding: 14px 24px 20px;
            border-top: 1px solid rgba(43, 53, 56, 0.04);
        }

        /* ===== CTA ===== */
        .cta-block {
            background: linear-gradient(135deg, #0F3E40 0%, #16595C 50%, #1F8A8C 100%);
            border-radius: var(--radius-lg);
            padding: 56px 48px;
            text-align: center;
            margin: 24px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-block::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(244, 233, 220, 0.06);
        }

        .cta-block::after {
            content: '';
            position: absolute;
            bottom: -80px;
            left: 30%;
            width: 180px;
            height: 180px;
            border-radius: 50%;
            background: rgba(244, 233, 220, 0.04);
        }

        .cta-block h2 {
            color: #fff;
            font-size: 26px;
            font-weight: 700;
            margin-bottom: 12px;
            position: relative;
            z-index: 1;
        }

        .cta-block p {
            color: rgba(255, 255, 255, 0.72);
            font-size: 15px;
            max-width: 560px;
            margin: 0 auto 28px;
            line-height: 1.7;
            position: relative;
            z-index: 1;
        }

        .cta-btn {
            display: inline-block;
            background: var(--sand);
            color: var(--teal-deep);
            font-size: 16px;
            font-weight: 600;
            padding: 14px 36px;
            border-radius: var(--radius-md);
            transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
            position: relative;
            z-index: 1;
        }

        .cta-btn:hover {
            background: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.22);
        }

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

        .cta-btn i {
            margin-right: 8px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #263033;
            color: #D9DED8;
            padding: 56px 0 0;
            font-size: 14px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 36px;
        }

        .footer-brand h3 {
            color: #fff;
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 12px;
            letter-spacing: 1px;
        }

        .footer-brand p {
            line-height: 1.7;
            color: #AEB7B2;
            font-size: 14px;
            max-width: 320px;
        }

        .footer-col h4 {
            color: rgba(255, 255, 255, 0.85);
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 14px;
            letter-spacing: 0.5px;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
        }

        .footer-col ul li {
            padding: 4px 0;
            font-size: 14px;
            color: #AEB7B2;
            line-height: 1.7;
            display: flex;
            align-items: baseline;
            gap: 8px;
        }

        .footer-col ul li i {
            font-size: 10px;
            color: rgba(255, 255, 255, 0.3);
            width: 14px;
            margin-top: 2px;
        }

        .footer-col ul li a {
            color: #AEB7B2;
            transition: color 0.2s;
        }

        .footer-col ul li a:hover {
            color: var(--sand);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding: 20px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: rgba(174, 183, 178, 0.7);
            flex-wrap: wrap;
            gap: 8px;
        }

        .footer-bottom a {
            color: rgba(174, 183, 178, 0.7);
            transition: color 0.2s;
        }

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

        .icp {
            color: rgba(174, 183, 178, 0.55);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1023px) {
            .site-nav {
                width: 100px;
            }

            .nav-brand {
                padding: 20px 14px;
            }

            .nav-brand a {
                justify-content: center;
            }

            .brand-text, .brand-sub {
                display: none;
            }

            .nav-links {
                padding: 12px 10px;
            }

            .nav-links a {
                justify-content: center;
                padding: 12px 0;
                font-size: 0;
                gap: 0;
            }

            .nav-links a i {
                font-size: 18px;
                margin: 0;
            }

            .nav-links a.active::after {
                display: none;
            }

            .nav-footer {
                padding: 14px 10px;
                text-align: center;
            }

            .nav-footer p,
            .nav-footer .nav-copyright {
                font-size: 11px;
                line-height: 1.5;
            }

            .main-wrapper {
                margin-left: 100px;
            }

            .scenario-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .process-steps {
                grid-template-columns: repeat(2, 1fr);
                gap: 32px 24px;
            }

            .process-steps::before {
                display: none;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

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

            .mobile-topbar {
                display: flex;
                align-items: center;
                justify-content: space-between;
                padding: 14px 20px;
                background: var(--bg);
                border-bottom: 1px solid rgba(43, 53, 56, 0.08);
                position: sticky;
                top: 0;
                z-index: 200;
            }

            .mobile-brand {
                display: flex;
                align-items: center;
                gap: 10px;
            }

            .mobile-brand .brand-text {
                font-size: 16px;
            }

            .mobile-brand .brand-icon {
                width: 36px;
                height: 36px;
                font-size: 15px;
            }

            .hamburger {
                display: flex;
            }

            .main-wrapper {
                margin-left: 0;
            }

            .mobile-menu {
                display: none;
                position: fixed;
                top: 64px;
                left: 0;
                right: 0;
                background: #EDEAE3;
                z-index: 199;
                box-shadow: 0 8px 24px rgba(43, 53, 56, 0.15);
                border-bottom: 1px solid rgba(43, 53, 56, 0.08);
            }

            .mobile-menu.open {
                display: block;
            }

            .mobile-menu a {
                display: flex;
                align-items: center;
                gap: 12px;
                padding: 16px 20px;
                font-size: 16px;
                font-weight: 500;
                color: var(--ink);
                border-bottom: 1px solid rgba(43, 53, 56, 0.06);
            }

            .mobile-menu a i {
                width: 20px;
                color: var(--ink-soft);
            }

            .mobile-menu a.active {
                background: var(--teal);
                color: #fff;
            }

            .mobile-menu a.active i {
                color: #fff;
            }

            .container {
                padding-left: 20px;
                padding-right: 20px;
            }

            .category-hero {
                padding: 40px 0 24px;
            }

            .category-hero h1 {
                font-size: 26px;
            }

            .category-hero .hero-desc {
                font-size: 15px;
            }

            .block {
                padding: 36px 0;
            }

            .block-heading h2 {
                font-size: 21px;
            }

            .block-heading .sub {
                display: none;
            }

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

            .service-card .card-img,
            .service-card:nth-child(1) .card-img {
                height: 200px;
            }

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

            .process-wrap {
                padding: 24px 20px;
            }

            .process-steps {
                grid-template-columns: 1fr;
            }

            .cta-block {
                padding: 40px 24px;
            }

            .cta-block h2 {
                font-size: 22px;
            }

            .cta-block p {
                font-size: 14px;
            }

            .cta-btn {
                display: block;
                padding: 14px 20px;
                font-size: 15px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
                padding-bottom: 24px;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
            }

            .faq-question {
                padding: 16px 18px;
                font-size: 15px;
            }

            .faq-answer p {
                font-size: 14px;
                padding: 12px 18px 16px;
            }
        }

        @media (max-width: 520px) {
            .brand-text {
                font-size: 15px;
            }

            .brand-sub {
                display: none;
            }

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

            .category-hero h1 {
                font-size: 23px;
                word-break: break-all;
            }

            .service-card .card-img,
            .service-card:nth-child(1) .card-img {
                height: 180px;
            }

            .card-body {
                padding: 18px;
            }

            .process-step {
                padding-top: 12px;
            }

            .step-num {
                width: 48px;
                height: 48px;
                font-size: 18px;
            }
        }

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

        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border-width: 0;
        }

/* roulang page: article */
:root {
            --brand: #1F8A8C;
            --brand-dark: #156568;
            --brand-soft: #E8F3F3;
            --sand: #F4E9DC;
            --pearl: #FBF9F5;
            --white: #FFFFFF;
            --ink: #2B3538;
            --muted: #5C6B6E;
            --rust: #C75B3A;
            --border: #E5E0D8;
            --radius-lg: 12px;
            --radius-md: 8px;
            --radius-sm: 4px;
            --shadow-sm: 0 2px 8px rgba(43,53,56,0.06);
            --shadow-md: 0 12px 28px rgba(43,53,56,0.12);
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", system-ui, -apple-system, sans-serif;
            background: var(--pearl);
            color: var(--ink);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        a { text-decoration: none; color: inherit; }
        img { max-width: 100%; display: block; }
        ul, ol { list-style: none; }
        button { font-family: inherit; cursor: pointer; border: none; background: none; }
        input, textarea { font-family: inherit; }

        /* ===== 左侧导航 ===== */
        .site-nav {
            position: fixed;
            left: 0;
            top: 0;
            bottom: 0;
            width: 260px;
            background: var(--white);
            border-right: 1px solid var(--border);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            padding: 32px 20px 24px;
            z-index: 50;
            transition: width .3s ease;
        }
        .brand-block {
            display: flex;
            flex-direction: column;
            align-items: flex-start;
            gap: 10px;
            padding-bottom: 28px;
            border-bottom: 1px solid var(--border);
        }
        .brand-icon {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--brand) 0%, var(--brand-dark) 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 20px;
            box-shadow: 0 6px 16px rgba(31,138,140,.28);
        }
        .brand-name {
            font-size: 18px;
            font-weight: 700;
            color: var(--ink);
            letter-spacing: .5px;
        }
        .brand-domain {
            font-size: 12px;
            color: var(--muted);
            letter-spacing: .3px;
        }
        .nav-menu { padding: 24px 0; flex: 1; }
        .nav-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 13px 16px;
            border-radius: 10px;
            color: var(--muted);
            font-size: 15px;
            font-weight: 500;
            margin-bottom: 6px;
            transition: all .2s ease;
            position: relative;
            overflow: hidden;
        }
        .nav-item i { width: 20px; text-align: center; font-size: 16px; color: #9AA8A5; transition: color .2s; }
        .nav-item:hover { background: var(--brand-soft); color: var(--brand-dark); }
        .nav-item:hover i { color: var(--brand); }
        .nav-item.active {
            background: var(--brand);
            color: #fff;
            box-shadow: 0 6px 16px rgba(31,138,140,.3);
        }
        .nav-item.active i { color: #fff; }
        .nav-item::after {
            content: "";
            position: absolute;
            bottom: 6px;
            left: 16px;
            right: 16px;
            height: 2px;
            background: var(--brand);
            transform: scaleX(0);
            transform-origin: left;
            transition: transform .3s ease;
        }
        .nav-item:hover::after { transform: scaleX(1); }
        .nav-foot { border-top: 1px solid var(--border); padding-top: 18px; }
        .nav-foot p { font-size: 13px; color: var(--muted); margin-bottom: 4px; display: flex; align-items: center; gap: 8px; }
        .nav-foot p i { color: var(--brand); width: 16px; }
        .nav-burger { display: none; }

        /* ===== 移动端顶栏 ===== */
        .mobile-topbar {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 64px;
            background: var(--white);
            border-bottom: 1px solid var(--border);
            align-items: center;
            justify-content: space-between;
            padding: 0 20px;
            z-index: 60;
        }
        .mobile-brand { font-size: 17px; font-weight: 700; color: var(--ink); }
        .hamburger { width: 40px; height: 40px; border-radius: 8px; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 5px; background: var(--brand-soft); }
        .hamburger span { display: block; width: 20px; height: 2px; background: var(--brand-dark); border-radius: 2px; transition: all .25s; }
        .hamburger:hover span { background: var(--brand); }

        /* ===== 移动菜单抽屉 ===== */
        .mobile-menu {
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            width: 280px;
            background: var(--white);
            z-index: 110;
            transform: translateX(-100%);
            transition: transform .3s ease-in-out;
            padding: 28px 20px;
            box-shadow: var(--shadow-md);
        }
        .mobile-menu.open { transform: translateX(0); }
        .close-menu {
            position: absolute;
            top: 16px;
            right: 16px;
            width: 36px;
            height: 36px;
            border-radius: 8px;
            background: var(--brand-soft);
            color: var(--brand-dark);
            font-size: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: background .2s;
        }
        .close-menu:hover { background: var(--brand); color: #fff; }
        .mobile-nav { margin-top: 52px; }
        .mobile-nav-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 14px 16px;
            border-radius: 10px;
            color: var(--muted);
            font-size: 16px;
            font-weight: 500;
            margin-bottom: 6px;
            transition: all .2s;
            border: 1px solid transparent;
        }
        .mobile-nav-item i { width: 20px; text-align: center; color: var(--brand); }
        .mobile-nav-item:hover { background: var(--brand-soft); color: var(--brand-dark); }
        .mobile-nav-item.active { background: var(--brand); color: #fff; }
        .mobile-nav-item.active i { color: #fff; }
        .menu-overlay {
            position: fixed;
            inset: 0;
            background: rgba(43,53,56,.45);
            z-index: 100;
            opacity: 0;
            visibility: hidden;
            transition: all .3s;
        }
        .menu-overlay.show { opacity: 1; visibility: visible; }

        /* ===== 主内容区 ===== */
        .main-content { margin-left: 260px; min-height: 100vh; display: flex; flex-direction: column; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 32px; width: 100%; }

        /* ===== 文章页 ===== */
        .article-page { padding: 48px 0 16px; }
        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            font-size: 13px;
            color: var(--muted);
            margin-bottom: 28px;
            gap: 4px;
        }
        .breadcrumb a { color: var(--muted); transition: color .2s; display: inline-flex; align-items: center; gap: 6px; }
        .breadcrumb a:hover { color: var(--brand); }
        .breadcrumb .sep { color: #C3C8C5; margin: 0 6px; }
        .breadcrumb .current { color: var(--ink); font-weight: 500; }

        .article-card {
            background: var(--white);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            padding: 40px 48px 32px;
        }
        .article-header { border-bottom: 1px solid var(--border); padding-bottom: 24px; margin-bottom: 8px; }
        .article-header h1 {
            font-size: 32px;
            line-height: 1.35;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 16px;
            letter-spacing: .5px;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            font-size: 14px;
            color: var(--muted);
        }
        .article-meta span { display: inline-flex; align-items: center; gap: 6px; }
        .article-meta i { color: var(--brand); font-size: 14px; }
        .article-meta .tag {
            background: var(--brand-soft);
            color: var(--brand-dark);
            font-size: 13px;
            font-weight: 500;
            padding: 2px 12px;
            border-radius: 20px;
            display: inline-block;
        }

        /* 正文排版 */
        .article-body { max-width: 780px; padding-top: 26px; }
        .article-body p { font-size: 16px; line-height: 1.85; margin-bottom: 1.4em; color: #35464A; }
        .article-body h2 { font-size: 22px; font-weight: 700; margin: 38px 0 14px; color: var(--ink); line-height: 1.4; }
        .article-body h3 { font-size: 18px; font-weight: 600; margin: 30px 0 12px; color: var(--ink); }
        .article-body h4 { font-size: 16px; font-weight: 600; margin: 24px 0 10px; color: var(--ink); }
        .article-body ul { list-style: disc; margin-bottom: 1.4em; padding-left: 24px; }
        .article-body ol { list-style: decimal; margin-bottom: 1.4em; padding-left: 24px; }
        .article-body li { margin-bottom: 8px; font-size: 16px; line-height: 1.7; }
        .article-body blockquote {
            border-left: 4px solid var(--brand);
            background: var(--sand);
            padding: 16px 22px;
            margin: 24px 0;
            border-radius: 0 8px 8px 0;
            color: var(--ink);
            font-size: 15px;
        }
        .article-body img { border-radius: var(--radius-md); margin: 24px 0; box-shadow: var(--shadow-sm); }
        .article-body a { color: var(--brand); text-decoration: underline; text-underline-offset: 3px; transition: color .2s; }
        .article-body a:hover { color: var(--brand-dark); }
        .article-body table { width: 100%; border-collapse: collapse; margin: 24px 0; font-size: 15px; }
        .article-body table th { background: var(--brand-soft); color: var(--ink); font-weight: 600; padding: 10px 14px; text-align: left; }
        .article-body table td { border-bottom: 1px solid var(--border); padding: 10px 14px; }
        .article-body table tr:hover td { background: #F7FCF9; }
        .article-body pre { background: #2B3538; color: #E8F3F3; padding: 18px 20px; border-radius: 8px; overflow-x: auto; font-size: 14px; margin: 24px 0; }
        .article-body code { font-family: "SFMono-Regular", Consolas, monospace; font-size: 14px; }
        .article-body hr { border: none; border-top: 1px solid var(--border); margin: 32px 0; }

        /* 内容未找到 */
        .not-found { text-align: center; padding: 80px 20px; }
        .not-found i { font-size: 48px; color: var(--brand); opacity: .4; margin-bottom: 16px; }
        .not-found p { font-size: 18px; color: var(--muted); margin-bottom: 24px; }

        /* 按钮 */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: var(--brand);
            color: #fff;
            padding: 12px 28px;
            border-radius: 8px;
            font-size: 15px;
            font-weight: 600;
            transition: all .2s ease;
            box-shadow: 0 4px 12px rgba(31,138,140,.25);
            min-height: 44px;
        }
        .btn-primary:hover { background: var(--brand-dark); transform: translateY(-2px); box-shadow: 0 8px 20px rgba(31,138,140,.35); }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--white);
            color: var(--brand-dark);
            border: 1px solid var(--brand);
            padding: 11px 26px;
            border-radius: 8px;
            font-size: 15px;
            font-weight: 500;
            transition: all .2s ease;
            min-height: 44px;
        }
        .btn-outline:hover { background: var(--sand); border-color: var(--brand-dark); color: var(--brand-dark); }

        /* 相关推荐 */
        .related-block { margin-top: 52px; padding-top: 36px; border-top: 1px solid var(--border); }
        .section-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 24px; }
        .section-head h2 { font-size: 22px; font-weight: 700; color: var(--ink); }
        .section-head a { font-size: 14px; color: var(--brand); font-weight: 500; display: inline-flex; align-items: center; gap: 6px; transition: color .2s; }
        .section-head a:hover { color: var(--brand-dark); }
        .related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
        .rec-card {
            display: block;
            background: var(--white);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: all .25s ease;
        }
        .rec-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
        .rec-thumb { aspect-ratio: 16 / 9; overflow: hidden; background: var(--brand-soft); }
        .rec-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
        .rec-card:hover .rec-thumb img { transform: scale(1.05); }
        .rec-info { padding: 16px 18px 20px; }
        .rec-info h3 { font-size: 16px; font-weight: 600; color: var(--ink); margin-bottom: 6px; }
        .rec-info p { font-size: 13px; color: var(--muted); line-height: 1.6; overflow: hidden; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }

        .article-footer-link { margin-top: 36px; text-align: center; }
        .article-footer-link .btn-outline i { transition: transform .2s; }
        .article-footer-link .btn-outline:hover i { transform: translateX(-4px); }

        /* ===== 页脚 ===== */
        .site-footer { background: #243034; color: rgba(255,255,255,.75); padding: 56px 0 28px; margin-top: 48px; }
        .footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
        .footer-brand h3 { font-size: 20px; font-weight: 700; color: #fff; margin-bottom: 12px; letter-spacing: .5px; }
        .footer-brand p { font-size: 14px; line-height: 1.8; color: rgba(255,255,255,.6); }
        .footer-col h4 { font-size: 15px; font-weight: 600; color: #fff; margin-bottom: 16px; }
        .footer-col ul li { margin-bottom: 10px; font-size: 14px; }
        .footer-col a { color: rgba(255,255,255,.65); transition: color .2s; display: inline-flex; align-items: center; gap: 6px; }
        .footer-col a:hover { color: var(--sand); }
        .footer-col i { font-size: 12px; color: var(--brand); width: 16px; }
        .footer-col li { display: flex; align-items: center; gap: 8px; color: rgba(255,255,255,.65); font-size: 14px; }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,.1);
            padding-top: 22px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 13px;
            color: rgba(255,255,255,.45);
        }
        .footer-bottom a { color: rgba(255,255,255,.55); transition: color .2s; }
        .footer-bottom a:hover { color: var(--sand); }

        /* ===== 响应式 ===== */
        @media (max-width: 1023px) {
            .site-nav { width: 100px; padding: 24px 12px; align-items: center; }
            .site-nav .brand-block { align-items: center; padding-bottom: 20px; border-bottom: none; }
            .site-nav .brand-name, .site-nav .brand-domain, .site-nav .nav-item span, .site-nav .nav-foot { display: none; }
            .site-nav .nav-menu { display: flex; flex-direction: column; align-items: center; }
            .site-nav .nav-item { padding: 14px; justify-content: center; }
            .site-nav .nav-item i { margin: 0; font-size: 18px; }
            .nav-burger { display: flex; width: 40px; height: 40px; border-radius: 10px; background: var(--brand-soft); color: var(--brand-dark); align-items: center; justify-content: center; font-size: 17px; margin-top: auto; transition: background .2s; }
            .nav-burger:hover { background: var(--brand); color: #fff; }
            .main-content { margin-left: 100px; }
            .article-card { padding: 32px 28px; }
            .related-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 767px) {
            .site-nav { display: none; }
            .mobile-topbar { display: flex; }
            .main-content { margin-left: 0; padding-top: 64px; }
            .container { padding: 0 16px; }
            .article-page { padding-top: 24px; }
            .article-card { padding: 24px 18px; border-radius: 10px; }
            .article-header h1 { font-size: 24px; }
            .article-meta { gap: 12px; font-size: 13px; flex-wrap: wrap; }
            .related-grid { grid-template-columns: 1fr; gap: 16px; }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }
        @media (max-width: 520px) {
            .article-body p { font-size: 15px; }
            .article-header h1 { font-size: 21px; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .breadcrumb { font-size: 12px; }
        }

/* roulang page: category2 */
/* ===== 设计变量 ===== */
        :root {
            --teal: #1F8A8C;
            --teal-dark: #156568;
            --teal-darker: #0F4F50;
            --sand: #F4E9DC;
            --sand-light: #FBF6F0;
            --bg: #FBF9F5;
            --card: #FFFFFF;
            --ink: #2B3538;
            --ink-light: #5C6B6E;
            --rust: #C75B3A;
            --copper: #A67C52;
            --border: #E5E1DA;
            --radius-lg: 12px;
            --radius-md: 8px;
            --radius-sm: 4px;
            --shadow-sm: 0 2px 8px rgba(43, 53, 56, 0.06);
            --shadow-lg: 0 12px 28px rgba(43, 53, 56, 0.12);
            --sidebar-w: 260px;
            --sidebar-w-sm: 100px;
            --font-stack: "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
        }

        /* ===== Reset / Base ===== */
        *,
        *::before,
        *::after {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-stack);
            background: var(--bg);
            color: var(--ink);
            line-height: 1.7;
            font-size: 15.5px;
            -webkit-font-smoothing: antialiased;
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        img {
            max-width: 100%;
            display: block;
        }
        button {
            border: none;
            background: none;
            cursor: pointer;
            font-family: inherit;
        }
        input,
        textarea {
            font-family: inherit;
        }
        ul,
        ol {
            list-style: none;
        }

        /* ===== 通用容器 ===== */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 36px;
        }

        /* ===== 左侧导航 ===== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-w);
            height: 100vh;
            background: #EDF2EF;
            border-right: 1px solid var(--border);
            display: flex;
            flex-direction: column;
            z-index: 1000;
            overflow-y: auto;
            transition: transform 0.3s ease;
        }
        .sidebar__brand {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 28px 24px 20px;
            border-bottom: 1px solid rgba(43, 53, 56, 0.07);
        }
        .brand-icon {
            width: 42px;
            height: 42px;
            border-radius: var(--radius-md);
            background: var(--teal);
            color: #fff;
            font-size: 18px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            box-shadow: 0 4px 12px rgba(31, 138, 140, 0.28);
        }
        .brand-text {
            display: flex;
            flex-direction: column;
            line-height: 1.3;
        }
        .brand-text strong {
            font-size: 16px;
            font-weight: 700;
            color: var(--ink);
            letter-spacing: 0.5px;
        }
        .brand-text span {
            font-size: 12.5px;
            color: var(--ink-light);
            margin-top: 2px;
        }

        .sidebar__nav {
            flex: 1;
            padding: 20px 16px;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .nav-caption {
            font-size: 12px;
            color: var(--ink-light);
            letter-spacing: 2px;
            text-transform: uppercase;
            padding: 0 10px 10px;
            font-weight: 600;
        }
        .nav-link {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 14px;
            border-radius: var(--radius-md);
            font-size: 15px;
            font-weight: 500;
            color: var(--ink);
            transition: background 0.2s, color 0.2s, transform 0.2s;
            position: relative;
        }
        .nav-link i {
            width: 20px;
            text-align: center;
            font-size: 15px;
            color: var(--ink-light);
            transition: color 0.2s;
        }
        .nav-link:hover {
            background: rgba(31, 138, 140, 0.08);
            color: var(--teal-dark);
        }
        .nav-link:hover::after {
            content: '';
            position: absolute;
            left: 14px;
            right: 14px;
            bottom: 4px;
            height: 2px;
            background: var(--teal);
            border-radius: 2px;
            animation: nav-line 0.3s ease forwards;
        }
        .nav-link:hover i {
            color: var(--teal);
        }
        .nav-link.active {
            background: var(--teal);
            color: #fff;
            box-shadow: 0 6px 16px rgba(31, 138, 140, 0.3);
        }
        .nav-link.active i {
            color: #fff;
        }
        .nav-link.active:hover::after {
            display: none;
        }
        @keyframes nav-line {
            from {
                opacity: 0;
                transform: scaleX(0.2);
            }
            to {
                opacity: 1;
                transform: scaleX(1);
            }
        }

        .sidebar__foot {
            padding: 20px 24px 24px;
            border-top: 1px solid rgba(43, 53, 56, 0.07);
        }
        .side-contact {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--ink-light);
            margin-bottom: 8px;
            word-break: break-all;
        }
        .side-contact i {
            color: var(--teal);
            font-size: 13px;
            flex-shrink: 0;
        }
        .sidebar__foot p {
            font-size: 12.5px;
            color: #849396;
        }

        /* 移动端遮罩 */
        .sidebar-overlay {
            position: fixed;
            inset: 0;
            background: rgba(43, 53, 56, 0.4);
            z-index: 999;
            opacity: 0;
            visibility: hidden;
            transition: opacity 0.3s, visibility 0.3s;
        }
        .sidebar-overlay.show {
            opacity: 1;
            visibility: visible;
        }

        /* ===== 移动端顶栏 ===== */
        .mobile-header {
            display: none;
            align-items: center;
            justify-content: space-between;
            padding: 14px 20px;
            background: var(--card);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 900;
            box-shadow: var(--shadow-sm);
        }
        .mobile-brand {
            font-size: 16px;
            font-weight: 700;
            color: var(--ink);
        }
        .mobile-toggle {
            width: 40px;
            height: 40px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            background: var(--bg);
            color: var(--teal);
            font-size: 16px;
            transition: background 0.2s, color 0.2s;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .mobile-toggle:hover {
            background: var(--teal);
            color: #fff;
        }

        /* ===== 主内容区 ===== */
        .main-content {
            margin-left: var(--sidebar-w);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        .main-content>section {
            flex-shrink: 0;
        }

        /* ===== 分类页 H1 区 ===== */
        .category-hero {
            position: relative;
            background: linear-gradient(135deg, #E8EEEA 0%, #FBF9F5 62%);
            border-bottom: 1px solid var(--border);
            padding: 64px 0 58px;
            overflow: hidden;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center 30%;
            opacity: 0.10;
            pointer-events: none;
        }
        .category-hero::after {
            content: '';
            position: absolute;
            right: -80px;
            bottom: -120px;
            width: 380px;
            height: 380px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(31, 138, 140, 0.10) 0%, transparent 70%);
            pointer-events: none;
        }
        .category-hero__inner {
            position: relative;
            z-index: 2;
            max-width: 760px;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--ink-light);
            margin-bottom: 22px;
        }
        .breadcrumb a {
            color: var(--teal);
            font-weight: 500;
            transition: color 0.2s;
        }
        .breadcrumb a:hover {
            color: var(--teal-dark);
        }
        .breadcrumb .sep {
            color: #C0C7C4;
        }
        .category-hero .eyebrow {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 1.5px;
            color: var(--teal);
            background: rgba(31, 138, 140, 0.08);
            border: 1px solid rgba(31, 138, 140, 0.15);
            padding: 4px 14px;
            border-radius: 999px;
            margin-bottom: 16px;
        }
        .category-hero h1 {
            font-size: 33px;
            font-weight: 700;
            color: var(--ink);
            line-height: 1.3;
            letter-spacing: 0.5px;
            margin-bottom: 16px;
        }
        .category-hero .lead {
            font-size: 16px;
            color: var(--ink-light);
            line-height: 1.8;
            max-width: 640px;
        }

        /* ===== 通用板块 ===== */
        .section-block {
            padding: 72px 0;
        }
        .section-head {
            margin-bottom: 40px;
        }
        .section-head .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--teal);
            margin-bottom: 10px;
            letter-spacing: 1px;
        }
        .section-head h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--ink);
            line-height: 1.4;
            margin-bottom: 8px;
        }
        .section-head p {
            font-size: 15px;
            color: var(--ink-light);
            max-width: 560px;
        }

        /* ===== 卡片网格 ===== */
        .card-grid-section {
            background: var(--bg);
        }
        .cat-card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .card-feature {
            grid-column: span 2;
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: transform 0.25s ease, box-shadow 0.25s ease;
            display: flex;
            flex-direction: column;
        }
        .card-feature:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-lg);
        }
        .card-feature .card-media {
            height: 220px;
            overflow: hidden;
            position: relative;
        }
        .card-feature .card-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .card-feature:hover .card-media img {
            transform: scale(1.03);
        }
        .card-feature .card-body {
            padding: 24px 26px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .card-feature .card-tags {
            margin-bottom: 12px;
        }
        .card-feature h3 {
            font-size: 19px;
            font-weight: 600;
            color: var(--ink);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .card-feature p {
            font-size: 15px;
            color: var(--ink-light);
            line-height: 1.75;
            max-width: 480px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .card-feature .card-link {
            margin-top: auto;
            padding-top: 16px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 600;
            color: var(--teal);
            transition: color 0.2s, gap 0.2s;
        }
        .card-feature .card-link:hover {
            color: var(--teal-dark);
            gap: 12px;
        }

        .cat-card {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: transform 0.25s ease, box-shadow 0.25s ease;
            display: flex;
            flex-direction: column;
        }
        .cat-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-lg);
        }
        .cat-card .card-media {
            height: 130px;
            overflow: hidden;
            position: relative;
        }
        .cat-card .card-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .cat-card:hover .card-media img {
            transform: scale(1.03);
        }
        .cat-card .card-body {
            padding: 18px 20px 16px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .cat-card h3 {
            font-size: 16.5px;
            font-weight: 600;
            color: var(--ink);
            margin-bottom: 6px;
            line-height: 1.4;
        }
        .cat-card p {
            font-size: 14px;
            color: var(--ink-light);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 12px;
        }
        .cat-card .card-link {
            margin-top: auto;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--teal);
            transition: color 0.2s, gap 0.2s;
        }
        .cat-card .card-link:hover {
            color: var(--teal-dark);
            gap: 10px;
        }

        /* 标签徽章 */
        .card-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .tag {
            display: inline-block;
            font-size: 12.5px;
            font-weight: 600;
            color: var(--teal-dark);
            background: rgba(31, 138, 140, 0.08);
            border: 1px solid rgba(31, 138, 140, 0.16);
            padding: 2px 12px;
            border-radius: 999px;
            letter-spacing: 0.3px;
        }
        .tag.tag-rust {
            color: var(--rust);
            background: rgba(199, 91, 58, 0.08);
            border-color: rgba(199, 91, 58, 0.16);
        }
        .tag.tag-copper {
            color: var(--copper);
            background: rgba(166, 124, 82, 0.08);
            border-color: rgba(166, 124, 82, 0.18);
        }

        /* ===== 数据带 ===== */
        .stats-band {
            background: var(--sand-light);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
            padding: 44px 0;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
            text-align: center;
        }
        .stats-item .stats-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-md);
            background: var(--card);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--teal);
            margin-bottom: 12px;
        }
        .stats-item .stats-num {
            font-size: 26px;
            font-weight: 700;
            color: var(--ink);
            line-height: 1.2;
        }
        .stats-item .stats-text {
            font-size: 13.5px;
            color: var(--ink-light);
            margin-top: 4px;
        }

        /* ===== 查找路径区 ===== */
        .path-section {
            background: var(--bg);
        }
        .path-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .path-item {
            display: flex;
            align-items: flex-start;
            gap: 24px;
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 26px 30px;
            box-shadow: var(--shadow-sm);
            transition: box-shadow 0.25s, transform 0.25s;
        }
        .path-item:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
        }
        .path-num {
            font-size: 22px;
            font-weight: 700;
            color: var(--teal);
            letter-spacing: 1px;
            width: 52px;
            height: 52px;
            border-radius: var(--radius-md);
            background: rgba(31, 138, 140, 0.08);
            border: 1px solid rgba(31, 138, 140, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }
        .path-content h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--ink);
            margin-bottom: 6px;
        }
        .path-content p {
            font-size: 14.5px;
            color: var(--ink-light);
            line-height: 1.8;
            max-width: 620px;
        }
        .path-content p span {
            color: var(--teal);
            font-weight: 600;
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--bg);
        }
        .faq-list {
            max-width: 820px;
        }
        .faq-item {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            margin-bottom: 14px;
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: box-shadow 0.25s;
        }
        .faq-item.open {
            box-shadow: var(--shadow-lg);
        }
        .faq-item__question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 22px;
            font-size: 16px;
            font-weight: 600;
            color: var(--ink);
            text-align: left;
            background: transparent;
            transition: background 0.2s;
        }
        .faq-item__question:hover {
            background: var(--sand-light);
        }
        .faq-item__question .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            color: var(--teal);
            flex-shrink: 0;
            transition: transform 0.3s, background 0.3s, color 0.3s;
        }
        .faq-item.open .faq-item__question .faq-icon {
            transform: rotate(45deg);
            background: var(--teal);
            color: #fff;
            border-color: var(--teal);
        }
        .faq-item__answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
        }
        .faq-item.open .faq-item__answer {
            max-height: 320px;
        }
        .faq-item__answer-inner {
            padding: 0 22px 20px;
            font-size: 15px;
            color: var(--ink-light);
            line-height: 1.8;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--teal-darker);
            padding: 72px 0;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.08;
            pointer-events: none;
        }
        .cta-section__inner {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 620px;
            margin: 0 auto;
        }
        .cta-section h2 {
            font-size: 26px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            line-height: 1.4;
        }
        .cta-section p {
            font-size: 15.5px;
            color: #D9E2DF;
            margin-bottom: 30px;
            line-height: 1.8;
        }
        .cta-actions {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            height: 48px;
            padding: 0 28px;
            border-radius: var(--radius-md);
            font-size: 15px;
            font-weight: 600;
            transition: background 0.15s, box-shadow 0.15s, transform 0.15s, border-color 0.15s;
        }
        .btn-primary {
            background: var(--teal);
            color: #fff;
            box-shadow: 0 6px 18px rgba(31, 138, 140, 0.3);
        }
        .btn-primary:hover {
            background: var(--teal-dark);
            transform: translateY(-2px);
            box-shadow: 0 10px 24px rgba(31, 138, 140, 0.38);
        }
        .btn-primary:focus-visible {
            outline: 3px solid rgba(31, 138, 140, 0.35);
            outline-offset: 2px;
        }
        .btn-secondary {
            background: transparent;
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.45);
        }
        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
        }
        .btn-secondary:focus-visible {
            outline: 3px solid rgba(255, 255, 255, 0.3);
            outline-offset: 2px;
        }
        .btn.sand {
            background: var(--sand);
            color: var(--teal-darker);
        }
        .btn.sand:hover {
            background: #EADBCC;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.18);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #243033;
            color: #C7D0CD;
            padding: 56px 0 24px;
            margin-top: auto;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand h3 {
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
            letter-spacing: 0.5px;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: #A8B4B1;
            max-width: 300px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }
        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-col ul li {
            font-size: 14px;
            color: #A8B4B1;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .footer-col ul li i {
            font-size: 12px;
            color: var(--teal);
            width: 14px;
            text-align: center;
        }
        .footer-col ul li a {
            transition: color 0.2s;
        }
        .footer-col ul li a:hover {
            color: var(--sand);
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 24px;
            gap: 16px;
            font-size: 13px;
            color: #84938F;
            flex-wrap: wrap;
        }
        .footer-bottom .icp a {
            color: #A8B4B1;
            transition: color 0.2s;
        }
        .footer-bottom .icp a:hover {
            color: var(--sand);
        }

        /* ===== 响应式断点 ===== */
        @media (max-width: 1023px) {
            .sidebar {
                width: var(--sidebar-w-sm);
            }
            .sidebar__brand {
                flex-direction: column;
                text-align: center;
                padding: 22px 10px 16px;
                gap: 8px;
            }
            .brand-text span {
                display: none;
            }
            .brand-text strong {
                font-size: 13px;
                letter-spacing: 0;
                line-height: 1.3;
            }
            .sidebar__nav {
                padding: 16px 8px;
            }
            .nav-caption {
                text-align: center;
                padding: 0 0 10px;
                font-size: 11px;
                letter-spacing: 0;
            }
            .nav-link {
                justify-content: center;
                padding: 14px 6px;
            }
            .nav-link span {
                display: none;
            }
            .nav-link i {
                font-size: 17px;
            }
            .sidebar__foot {
                padding: 16px 8px;
                text-align: center;
            }
            .side-contact {
                justify-content: center;
                font-size: 0;
            }
            .side-contact i {
                font-size: 15px;
            }
            .sidebar__foot p {
                font-size: 11px;
            }
            .main-content {
                margin-left: var(--sidebar-w-sm);
            }
            .container {
                padding: 0 28px;
            }
        }

        @media (max-width: 767px) {
            .sidebar {
                width: 260px;
                transform: translateX(-100%);
                box-shadow: 6px 0 30px rgba(43, 53, 56, 0.16);
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .sidebar__brand {
                flex-direction: row;
                text-align: left;
                padding: 24px 20px 18px;
                gap: 12px;
            }
            .brand-text span {
                display: block;
            }
            .brand-text strong {
                font-size: 16px;
            }
            .sidebar__nav {
                padding: 18px 14px;
            }
            .nav-caption {
                text-align: left;
                padding: 0 12px 10px;
                font-size: 12px;
                letter-spacing: 2px;
            }
            .nav-link {
                justify-content: flex-start;
                padding: 12px 14px;
            }
            .nav-link span {
                display: inline;
            }
            .nav-link i {
                font-size: 15px;
            }
            .sidebar__foot {
                padding: 18px 20px;
                text-align: left;
            }
            .side-contact {
                justify-content: flex-start;
                font-size: 13px;
                gap: 8px;
            }
            .side-contact i {
                font-size: 13px;
            }
            .sidebar__foot p {
                font-size: 12.5px;
            }
            .main-content {
                margin-left: 0;
            }
            .mobile-header {
                display: flex;
            }
            .category-hero {
                padding: 44px 0 40px;
            }
            .category-hero h1 {
                font-size: 26px;
            }
            .section-block {
                padding: 52px 0;
            }
            .cat-card-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .card-feature {
                grid-column: span 1;
            }
            .stats-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .path-item {
                flex-direction: column;
                gap: 14px;
                padding: 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .cta-section {
                padding: 52px 0;
            }
            .cta-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .btn {
                width: 100%;
            }
            .container {
                padding: 0 20px;
            }
        }

        @media (max-width: 480px) {
            .category-hero h1 {
                font-size: 23px;
            }
            .category-hero .lead {
                font-size: 15px;
            }
            .section-head h2 {
                font-size: 21px;
            }
            .card-feature .card-body {
                padding: 18px 18px 16px;
            }
            .card-feature .card-media {
                height: 170px;
            }
            .cat-card .card-media {
                height: 150px;
            }
            .path-num {
                width: 44px;
                height: 44px;
                font-size: 18px;
            }
            .faq-item__question {
                font-size: 15px;
                padding: 16px 16px;
            }
            .faq-item__answer-inner {
                padding: 0 16px 18px;
                font-size: 14px;
            }
        }

        /* 无障碍 focus */
        a:focus-visible,
        button:focus-visible {
            outline: 3px solid rgba(31, 138, 140, 0.35);
            outline-offset: 2px;
        }