/* roulang page: index */
:root {
            --primary: #2F4A44;
            --primary-light: #E8EFED;
            --accent: #E07A3A;
            --accent-hover: #C9682F;
            --bg: #F6F4EF;
            --card: #FFFFFF;
            --text: #2A363B;
            --text-secondary: #5A6A70;
            --text-muted: #8A948B;
            --border: #E5E1D8;
            --success: #3E6B5E;
            --warning: #C25E3A;
            --disabled: #B8B2A8;
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-card: 0 2px 8px rgba(42,54,59,0.08);
            --shadow-hover: 0 8px 24px rgba(42,54,59,0.12);
            --container-max: 1200px;
            --transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            background: var(--bg);
            color: var(--text);
            font-size: 16px;
            line-height: 1.8;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color .2s ease;
        }

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

        input {
            font-family: inherit;
            font-size: 14px;
        }

        ul, ol {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .grid-container {
            max-width: var(--container-max);
            padding-left: 20px;
            padding-right: 20px;
        }

        /* ===== 顶部导航 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            height: 64px;
            background: #fff;
            border-bottom: 1px solid var(--border);
            transition: box-shadow .3s ease;
        }

        .site-header.scrolled {
            box-shadow: 0 2px 8px rgba(42,54,59,0.06);
        }

        .nav-container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 20px;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            position: relative;
        }

        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1;
        }

        .logo-svg {
            width: 32px;
            height: 32px;
            flex-shrink: 0;
        }

        .nav-links {
            display: flex;
            gap: 32px;
            align-items: center;
        }

        .nav-links a {
            font-size: 14px;
            font-weight: 500;
            color: var(--text);
            padding: 8px 0;
            position: relative;
            transition: color .2s ease;
        }

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

        .nav-links a.active {
            color: var(--primary);
        }

        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }

        .nav-cta {
            background: var(--accent);
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            padding: 10px 20px;
            border-radius: var(--radius-sm);
            transition: all .3s ease;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .nav-cta:hover {
            background: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(224,122,58,0.35);
        }

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: 6px;
        }

        .hamburger span {
            width: 22px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: all .3s ease;
        }

        .hamburger.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .hamburger.open span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        .mobile-menu {
            display: none;
            position: absolute;
            top: 64px;
            left: 0;
            right: 0;
            background: #fff;
            border-bottom: 1px solid var(--border);
            padding: 16px 20px;
            box-shadow: var(--shadow-hover);
            flex-direction: column;
            gap: 12px;
        }

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

        .mobile-menu a {
            font-size: 15px;
            font-weight: 500;
            color: var(--text);
            padding: 8px 12px;
            border-radius: 8px;
            transition: background .2s ease, color .2s ease;
        }

        .mobile-menu a:hover,
        .mobile-menu a.active {
            background: var(--primary-light);
            color: var(--primary);
        }

        /* ===== 移动端底部 Tab ===== */
        .bottom-tab {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 200;
            height: 56px;
            background: #fff;
            border-top: 1px solid var(--border);
            box-shadow: 0 -2px 8px rgba(42,54,59,0.06);
            align-items: stretch;
            justify-content: space-around;
            padding-bottom: env(safe-area-inset-bottom);
        }

        .tab-item {
            flex: 1;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            color: var(--text-muted);
            gap: 2px;
            transition: color .2s ease;
            background: none;
        }

        .tab-item i {
            font-size: 20px;
        }

        .tab-item.active {
            color: var(--primary);
        }

        .tab-item.tab-download {
            position: relative;
            top: -14px;
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background: var(--accent);
            color: #fff;
            box-shadow: 0 4px 12px rgba(224,122,58,0.4);
            flex: 0 0 60px;
            border: 4px solid #fff;
        }

        .tab-item.tab-download i {
            font-size: 22px;
        }

        .tab-item.tab-download span {
            font-size: 11px;
            font-weight: 600;
        }

        /* ===== 区块通用 ===== */
        .section {
            padding: 80px 0;
        }

        .section-white {
            background: #fff;
        }

        .section-light {
            background: var(--primary-light);
        }

        .section-dark {
            background: var(--primary);
            color: #fff;
        }

        .section-title {
            font-size: 28px;
            font-weight: 700;
            text-align: center;
            color: var(--text);
            line-height: 1.4;
            margin-bottom: 12px;
        }

        .section-sub {
            text-align: center;
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 48px;
            line-height: 1.6;
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            padding: 12px 28px;
            transition: all .3s ease;
            cursor: pointer;
            line-height: 1.4;
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--accent);
            color: #fff;
        }

        .btn-primary:hover {
            background: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(224,122,58,0.35);
        }

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

        .btn-secondary {
            background: transparent;
            border: 1px solid var(--primary);
            color: var(--primary);
        }

        .btn-secondary:hover {
            background: var(--primary-light);
            border-color: var(--primary);
            transform: translateY(-2px);
        }

        .btn-ghost {
            background: transparent;
            border: 1px solid rgba(255,255,255,0.85);
            color: #fff;
        }

        .btn-ghost:hover {
            background: #fff;
            color: var(--primary);
            transform: translateY(-2px);
            box-shadow: 0 4px 14px rgba(255,255,255,0.25);
        }

        .btn:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            box-shadow: 0 0 0 3px rgba(224,122,58,0.18);
        }

        /* ===== Hero ===== */
        .hero {
            padding: 96px 0;
            position: relative;
            overflow: hidden;
            background: var(--bg);
        }

        .hero::before {
            content: '';
            position: absolute;
            right: -120px;
            top: 15%;
            width: 420px;
            height: 420px;
            background: radial-gradient(circle, rgba(224,122,58,0.18), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero .circuit-line {
            position: absolute;
            inset: 0 auto auto 0;
            width: 100%;
            height: 180px;
            pointer-events: none;
            opacity: .5;
        }

        .hero-inner {
            position: relative;
            z-index: 2;
        }

        .hero h1 {
            font-size: 36px;
            line-height: 1.3;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 16px;
            letter-spacing: -0.01em;
        }

        .hero-sub {
            font-size: 18px;
            line-height: 1.6;
            color: var(--text-secondary);
            margin-bottom: 32px;
            max-width: 540px;
        }

        .hero-cta {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-bottom: 44px;
        }

        .hero-trust {
            display: flex;
            flex-wrap: wrap;
            gap: 32px;
        }

        .trust-item {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-secondary);
        }

        .trust-item i {
            font-size: 16px;
            color: var(--accent);
        }

        .hero-media {
            position: relative;
        }

        .hero-media img {
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-hover);
            width: 100%;
            object-fit: cover;
        }

        .hero-media::after {
            content: '';
            position: absolute;
            bottom: -16px;
            right: -16px;
            width: 120px;
            height: 120px;
            border-radius: var(--radius-lg);
            background: var(--primary-light);
            z-index: -1;
        }

        /* ===== Orbit 轮播 ===== */
        .feature-slider {
            padding: 80px 0;
            background: #fff;
        }

        .feature-slider .orbit {
            max-width: 900px;
            margin: 0 auto;
        }

        .orbit-container {
            list-style: none;
            padding: 0;
            margin: 0;
            position: relative;
        }

        .orbit-slide {
            display: none;
        }

        .orbit-slide.is-active {
            display: block;
        }

        .orbit-figure {
            margin: 0;
        }

        .orbit-image {
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-hover);
            width: 100%;
        }

        .orbit-caption {
            text-align: center;
            font-size: 14px;
            color: var(--text-secondary);
            margin-top: 16px;
            padding: 0 20px;
        }

        .orbit-previous,
        .orbit-next {
            position: absolute;
            top: 45%;
            transform: translateY(-50%);
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: #fff;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-card);
            font-size: 18px;
            color: var(--primary);
            z-index: 10;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all .3s ease;
        }

        .orbit-previous {
            left: -24px;
        }

        .orbit-next {
            right: -24px;
        }

        .orbit-previous:hover,
        .orbit-next:hover {
            background: var(--primary);
            color: #fff;
        }

        .orbit-bullets {
            text-align: center;
            margin-top: 24px;
        }

        .orbit-bullets button {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--border);
            margin: 0 6px;
            padding: 0;
            transition: all .3s ease;
        }

        .orbit-bullets button.is-active {
            background: var(--accent);
            width: 12px;
            height: 12px;
        }

        /* ===== 系统要求 ===== */
        .requirements {
            padding: 80px 0;
            background: var(--primary-light);
        }

        .tabs {
            display: flex;
            gap: 8px;
            margin-bottom: 32px;
            border: none;
            background: transparent;
            flex-wrap: wrap;
        }

        .tabs-title {
            margin: 0;
        }

        .tabs-title a {
            display: inline-flex;
            align-items: center;
            padding: 10px 20px;
            background: #fff;
            border-radius: 999px;
            color: var(--text-secondary);
            font-size: 14px;
            font-weight: 500;
            border: 1px solid var(--border);
            transition: all .3s ease;
            height: 40px;
        }

        .tabs-title a:hover {
            color: var(--primary);
            border-color: var(--primary);
            background: #fff;
        }

        .tabs-title.is-active a {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        .tabs-content {
            background: transparent;
            border: none;
        }

        .tabs-panel {
            display: none;
        }

        .tabs-panel.is-active {
            display: block;
        }

        .spec-table dl {
            display: flex;
            flex-wrap: wrap;
            margin: 0;
        }

        .spec-table dl > div {
            display: flex;
            width: 100%;
            padding: 12px 0;
            border-bottom: 1px solid rgba(0,0,0,0.04);
        }

        .spec-table dl > div:nth-child(odd) {
            background: #F1F4F2;
        }

        .spec-table dt {
            width: 30%;
            padding: 10px 16px;
            font-size: 13px;
            color: var(--text-muted);
        }

        .spec-table dd {
            width: 70%;
            padding: 10px 16px;
            font-size: 14px;
            color: var(--text);
            margin: 0;
        }

        .quick-card {
            background: #fff;
            border-radius: var(--radius-lg);
            border-top: 4px solid var(--accent);
            box-shadow: var(--shadow-card);
            padding: 28px;
            height: 100%;
        }

        .quick-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 20px;
        }

        .quick-card li {
            display: flex;
            justify-content: space-between;
            padding: 10px 0;
            border-bottom: 1px solid var(--border);
            font-size: 14px;
        }

        .quick-card li:last-child {
            border-bottom: none;
        }

        .quick-card li span:first-child {
            color: var(--text-muted);
        }

        .quick-card li span:last-child {
            color: var(--text);
            font-weight: 500;
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 80px 0;
            background: #fff;
        }

        .accordion {
            list-style: none;
            margin: 0 auto;
            padding: 0;
            max-width: 860px;
        }

        .accordion-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            margin-bottom: 10px;
            padding: 0 24px;
            transition: border-color .3s ease, background .3s ease;
            overflow: hidden;
        }

        .accordion-item.is-active {
            border-color: var(--accent);
            background: #FDF3EA;
        }

        .accordion-title {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 16px 0;
            font-size: 16px;
            font-weight: 600;
            color: var(--primary);
            cursor: pointer;
            transition: color .2s ease;
        }

        .accordion-title:hover {
            color: var(--accent);
        }

        .accordion-title::after {
            content: '+';
            width: 24px;
            height: 24px;
            font-size: 20px;
            font-weight: 400;
            color: var(--accent);
            background: var(--primary-light);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            transition: transform .3s ease;
            line-height: 1;
        }

        .accordion-item.is-active .accordion-title::after {
            transform: rotate(45deg);
        }

        .accordion-content {
            padding-bottom: 16px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .accordion-content p {
            margin-bottom: 12px;
        }

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

        /* ===== 评价墙 ===== */
        .reviews {
            padding: 80px 0;
            background: var(--primary-light);
        }

        .review-card {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 24px;
            box-shadow: var(--shadow-card);
            transform: rotate(-1deg);
            transition: var(--transition);
            border: 1px solid var(--border);
        }

        .review-card:nth-child(2) {
            transform: rotate(0deg);
        }

        .review-card:nth-child(3) {
            transform: rotate(1deg);
        }

        .review-card:hover {
            box-shadow: var(--shadow-hover);
            transform: rotate(0deg) translateY(-4px);
            border-color: var(--accent);
        }

        .review-header {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 16px;
        }

        .review-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 600;
            flex-shrink: 0;
        }

        .review-name {
            font-size: 14px;
            font-weight: 600;
            color: var(--text);
        }

        .review-stars {
            color: var(--accent);
            font-size: 14px;
            letter-spacing: 2px;
            margin-left: auto;
        }

        .review-text {
            font-size: 14px;
            line-height: 1.7;
            color: var(--text-secondary);
        }

        .more-reviews {
            text-align: center;
            margin-top: 40px;
        }

        .more-reviews a {
            color: var(--primary);
            font-size: 14px;
            font-weight: 500;
            border-bottom: 1px solid transparent;
            transition: border-color .2s ease;
        }

        .more-reviews a:hover {
            border-bottom-color: var(--primary);
        }

        /* ===== 下载区块 ===== */
        .download-section {
            background: var(--primary);
            color: #fff;
            text-align: center;
            padding: 80px 0;
            position: relative;
            overflow: hidden;
        }

        .download-section .section-title {
            color: #fff;
        }

        .download-section .section-sub {
            color: rgba(255,255,255,0.75);
        }

        .download-section .circuit-line {
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 120px;
            opacity: .4;
            pointer-events: none;
        }

        .download-buttons {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
            margin-bottom: 24px;
        }

        .version-text {
            font-size: 13px;
            color: rgba(255,255,255,0.7);
        }

        /* ===== 资讯列表 ===== */
        .news-section {
            padding: 80px 0;
            background: #fff;
        }

        .news-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 40px;
        }

        .news-header h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--text);
            line-height: 1.4;
        }

        .news-more {
            color: var(--primary);
            font-size: 14px;
            font-weight: 500;
            border-bottom: 1px solid transparent;
            transition: border-color .2s ease;
        }

        .news-more:hover {
            border-bottom-color: var(--primary);
        }

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

        .news-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }

        .news-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
            border-color: var(--accent);
        }

        .news-card-thumb {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: var(--primary-light);
        }

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

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

        .news-card-thumb i {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            font-size: 32px;
            color: var(--text-muted);
            opacity: .5;
        }

        .news-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--accent);
            color: #fff;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: 999px;
            z-index: 2;
        }

        .news-card-body {
            padding: 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .news-card-body h3 {
            font-size: 16px;
            font-weight: 600;
            line-height: 1.5;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-card-body h3 a:hover {
            color: var(--accent);
        }

        .news-card-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 16px;
            flex: 1;
        }

        .news-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 13px;
            color: var(--text-muted);
        }

        .news-meta a {
            color: var(--primary);
            font-weight: 500;
        }

        .empty-news {
            text-align: center;
            padding: 60px 0;
            color: var(--text-muted);
            font-size: 14px;
        }

        .empty-news i {
            display: block;
            font-size: 40px;
            margin-bottom: 12px;
            opacity: .5;
        }

        /* ===== 订阅 CTA ===== */
        .subscribe-section {
            background: var(--accent);
            color: #fff;
            padding: 64px 0;
        }

        .subscribe-inner {
            display: flex;
            align-items: center;
            gap: 48px;
        }

        .subscribe-text {
            flex: 1;
        }

        .subscribe-text h2 {
            font-size: 26px;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .subscribe-text p {
            font-size: 14px;
            color: rgba(255,255,255,0.85);
            line-height: 1.7;
        }

        .subscribe-form {
            flex: 1;
        }

        .subscribe-form form {
            display: flex;
            gap: 12px;
        }

        .subscribe-form input[type="email"] {
            flex: 1;
            height: 46px;
            border-radius: var(--radius-md);
            border: none;
            padding: 0 16px;
            font-size: 14px;
            color: var(--primary);
            outline: none;
            min-width: 0;
        }

        .subscribe-form input[type="email"]:focus {
            box-shadow: 0 0 0 3px rgba(255,255,255,0.35);
        }

        .subscribe-form .btn {
            background: var(--primary);
            color: #fff;
            height: 46px;
            white-space: nowrap;
            border-radius: var(--radius-md);
        }

        .subscribe-form .btn:hover {
            background: #1C312C;
            transform: translateY(-2px);
            box-shadow: 0 4px 14px rgba(0,0,0,0.2);
        }

        .privacy-note {
            font-size: 13px;
            color: rgba(255,255,255,0.75);
            margin-top: 12px;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--primary);
            color: #A8B4B0;
            padding: 64px 0 40px;
            position: relative;
        }

        .footer-circuit {
            position: absolute;
            top: 24px;
            left: 0;
            width: 100%;
            height: 80px;
            opacity: .4;
            pointer-events: none;
        }

        .footer-top {
            display: flex;
            gap: 60px;
            position: relative;
            z-index: 1;
        }

        .footer-brand {
            flex: 4;
        }

        .footer-brand .logo {
            color: #fff;
            margin-bottom: 16px;
            display: inline-flex;
        }

        .footer-brand .logo .logo-svg circle {
            stroke: #fff;
        }

        .footer-brand .logo .logo-svg path {
            stroke: var(--accent);
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: #A8B4B0;
            max-width: 300px;
        }

        .footer-links {
            flex: 8;
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .footer-links h4 {
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 16px;
        }

        .footer-links a {
            display: block;
            font-size: 14px;
            color: #A8B4B0;
            padding: 4px 0;
            transition: color .2s ease;
        }

        .footer-links a:hover {
            color: #fff;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            margin-top: 48px;
            padding-top: 24px;
            font-size: 13px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 8px;
            position: relative;
            z-index: 1;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .nav-links {
                display: none;
            }

            .nav-cta {
                display: none;
            }

            .hamburger {
                display: flex;
            }

            .bottom-tab {
                display: flex;
            }

            body {
                padding-bottom: 56px;
            }

            .hero {
                padding: 72px 0;
            }

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

            .hero-media {
                margin-top: 40px;
            }

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

            .orbit-previous {
                left: 8px;
            }

            .orbit-next {
                right: 8px;
            }

            .footer-top {
                flex-direction: column;
                gap: 40px;
            }

            .subscribe-inner {
                flex-direction: column;
                gap: 32px;
            }
        }

        @media (max-width: 640px) {
            .section {
                padding: 56px 0;
            }

            .hero {
                padding: 48px 0;
            }

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

            .hero-sub {
                font-size: 16px;
            }

            .hero-trust {
                gap: 20px;
            }

            .trust-item {
                font-size: 12px;
            }

            .section-title {
                font-size: 24px;
            }

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

            .news-header {
                flex-direction: column;
                gap: 12px;
                align-items: flex-start;
            }

            .footer-links {
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }

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

            .subscribe-form input[type="email"] {
                width: 100%;
            }

            .subscribe-form .btn {
                width: 100%;
            }

            .orbit-previous,
            .orbit-next {
                width: 36px;
                height: 36px;
                font-size: 14px;
            }

            .orbit-previous {
                left: 4px;
            }

            .orbit-next {
                right: 4px;
            }

            .tabs {
                gap: 6px;
            }

            .tabs-title a {
                padding: 8px 14px;
                font-size: 13px;
                height: 36px;
            }

            .spec-table dt {
                width: 40%;
                padding: 10px 12px;
            }

            .spec-table dd {
                width: 60%;
                padding: 10px 12px;
            }

            .quick-card {
                margin-top: 24px;
            }

            .accordion-item {
                padding: 0 16px;
            }

            .download-section {
                padding: 56px 0;
            }

            .download-buttons .btn {
                width: 100%;
            }

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

/* roulang page: category1 */
:root {
            --primary: #2F4A44;
            --primary-light: #E8EFED;
            --accent: #E07A3A;
            --accent-hover: #C9682F;
            --bg: #F6F4EF;
            --card: #ffffff;
            --text: #2A363B;
            --text-secondary: #5A6A70;
            --text-muted: #8A948B;
            --border: #E5E1D8;
            --success: #3E6B5E;
            --warning: #C25E3A;
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-sm: 0 2px 8px rgba(42, 54, 59, 0.08);
            --shadow-hover: 0 8px 24px rgba(42, 54, 59, 0.12);
            --transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            font-size: 15px;
            line-height: 1.8;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color .2s ease;
        }

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

        button,
        input {
            font-family: inherit;
        }

        .grid-container {
            max-width: 1200px;
        }

        /* ===== Header ===== */
        .site-header {
            background: var(--card);
            border-bottom: 1px solid var(--border);
            height: 64px;
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 1px 0 rgba(42, 54, 59, 0.02);
        }

        .site-header.scrolled {
            box-shadow: 0 2px 8px rgba(42, 54, 59, 0.06);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: 1200px;
            height: 100%;
            margin: 0 auto;
            padding: 0 20px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .logo-svg {
            width: 32px;
            height: 32px;
            flex-shrink: 0;
        }

        .logo span {
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: .5px;
        }

        .nav-links {
            display: flex;
            gap: 28px;
            align-items: center;
        }

        .nav-links a {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            position: relative;
            padding: 8px 0;
            line-height: 1.2;
            transition: color .2s ease;
        }

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

        .nav-links a:hover::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }

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

        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }

        .header-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--accent);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            padding: 10px 20px;
            border-radius: 8px;
            border: none;
            cursor: pointer;
            transition: background .2s ease, transform .2s ease, box-shadow .2s ease;
        }

        .header-cta:hover {
            background: var(--accent-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(224, 122, 58, 0.3);
        }

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

        .header-cta svg {
            width: 16px;
            height: 16px;
        }

        .mobile-header {
            display: none;
            align-items: center;
            justify-content: space-between;
            height: 52px;
            background: var(--card);
            border-bottom: 1px solid var(--border);
            padding: 0 16px;
            position: sticky;
            top: 0;
            z-index: 100;
        }

        .mobile-header .logo span {
            font-size: 17px;
        }

        .mobile-header .header-cta {
            font-size: 12px;
            padding: 7px 14px;
            border-radius: 6px;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 600;
            padding: 12px 28px;
            border-radius: 8px;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            line-height: 1.2;
        }

        .btn svg {
            width: 18px;
            height: 18px;
            flex-shrink: 0;
        }

        .btn-primary {
            background: var(--accent);
            color: #fff;
        }

        .btn-primary:hover {
            background: var(--accent-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(224, 122, 58, 0.3);
        }

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

        .btn-ghost {
            background: transparent;
            color: var(--primary);
            border: 1px solid var(--primary);
        }

        .btn-ghost:hover {
            background: var(--primary-light);
            color: var(--primary);
            border-color: var(--primary);
            transform: translateY(-2px);
        }

        .btn-white-ghost {
            background: transparent;
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.8);
        }

        .btn-white-ghost:hover {
            background: #fff;
            color: var(--primary);
            border-color: #fff;
            transform: translateY(-2px);
        }

        .btn:focus-visible,
        .header-cta:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            box-shadow: 0 0 0 3px rgba(224, 122, 58, 0.18);
        }

        /* ===== Hero ===== */
        .category-hero {
            background: var(--primary-light);
            position: relative;
            overflow: hidden;
            padding: 48px 0 54px;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            top: -30px;
            right: -10px;
            width: 340px;
            height: 340px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(224, 122, 58, 0.4) 0%, transparent 70%);
            pointer-events: none;
        }

        .category-hero .hero-circuit {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
            opacity: 0.4;
        }

        .hero-inner {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 780px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .hero-inner h1 {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--primary);
            margin: 0 0 12px;
        }

        .hero-inner p {
            font-size: 15px;
            line-height: 1.7;
            color: var(--text-secondary);
            margin: 0 auto;
            max-width: 600px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(224, 122, 58, 0.12);
            color: var(--accent-hover);
            font-size: 13px;
            font-weight: 600;
            padding: 5px 14px;
            border-radius: 999px;
            margin-bottom: 18px;
        }

        .hero-badge svg {
            width: 14px;
            height: 14px;
        }

        /* ===== Category Modules ===== */
        .category-modules {
            padding: 80px 0 72px;
            background: var(--bg);
        }

        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }

        .section-header h2 {
            font-size: 28px;
            font-weight: 700;
            line-height: 1.4;
            color: var(--primary);
            margin: 0 0 8px;
        }

        .section-header p {
            font-size: 14px;
            color: var(--text-muted);
            margin: 0;
        }

        .category-card {
            background: var(--card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: var(--transition);
            height: 100%;
        }

        .category-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
            border-color: var(--accent);
        }

        .category-card .card-media {
            overflow: hidden;
            height: 100%;
            min-height: 220px;
        }

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

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

        .category-card .card-content {
            padding: 32px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            height: 100%;
        }

        .category-card .card-content .card-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            color: var(--accent);
            background: rgba(224, 122, 58, 0.1);
            padding: 4px 12px;
            border-radius: 999px;
            margin-bottom: 14px;
            width: fit-content;
        }

        .category-card .card-content h3 {
            font-size: 21px;
            font-weight: 700;
            line-height: 1.4;
            color: var(--text);
            margin: 0 0 12px;
        }

        .category-card .card-content p {
            font-size: 15px;
            line-height: 1.8;
            color: var(--text-secondary);
            margin: 0 0 20px;
        }

        .card-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: color .2s ease, gap .2s ease;
        }

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

        .card-link svg {
            width: 16px;
            height: 16px;
        }

        .category-card-item {
            margin-bottom: 40px;
        }

        .category-card-item:last-child {
            margin-bottom: 0;
        }

        /* ===== HUD Panel ===== */
        .category-hud {
            background: var(--primary);
            color: #fff;
            padding: 72px 0;
            position: relative;
            overflow: hidden;
        }

        .category-hud::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 100%;
            height: 100%;
            background: url('/assets/images/backpic/back-2.png') right top/cover no-repeat;
            opacity: 0.08;
            pointer-events: none;
        }

        .hud-inner {
            position: relative;
            z-index: 2;
        }

        .hud-header {
            text-align: center;
            margin-bottom: 44px;
        }

        .hud-header h2 {
            font-size: 28px;
            font-weight: 700;
            line-height: 1.4;
            margin: 0 0 10px;
            color: #fff;
        }

        .hud-header p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
            margin: 0;
        }

        .hud-stats {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-bottom: 44px;
        }

        .hud-stat {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-md);
            padding: 24px 16px;
            text-align: center;
            backdrop-filter: blur(2px);
        }

        .hud-stat .num {
            font-size: 30px;
            font-weight: 700;
            color: #fff;
            line-height: 1.2;
            display: block;
            margin-bottom: 4px;
        }

        .hud-stat .label {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.4;
        }

        .hud-scenes {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
        }

        .hud-scene {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-md);
            padding: 20px;
            display: flex;
            gap: 14px;
            align-items: center;
        }

        .hud-scene svg {
            width: 24px;
            height: 24px;
            flex-shrink: 0;
            color: var(--accent);
        }

        .hud-scene .scene-text {
            font-size: 14px;
            line-height: 1.6;
            color: rgba(255, 255, 255, 0.85);
        }

        .hud-scene .scene-text strong {
            font-weight: 600;
            color: #fff;
            display: block;
            font-size: 15px;
            margin-bottom: 2px;
        }

        /* ===== FAQ ===== */
        .category-faq {
            padding: 80px 0;
            background: var(--bg);
        }

        .faq-container {
            max-width: 900px;
            margin: 0 auto;
        }

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

        .accordion-item {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: 12px;
            margin-bottom: 10px;
            overflow: hidden;
            transition: border-color .2s ease, background .2s ease;
        }

        .accordion-item.is-active {
            border-color: var(--accent);
            background: #FDF3EA;
        }

        .accordion-title {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 16px;
            font-weight: 600;
            color: var(--primary);
            padding: 20px 24px;
            cursor: pointer;
            position: relative;
            background: transparent;
            border-bottom: none;
            line-height: 1.5;
        }

        .accordion-title::before {
            content: '';
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: var(--primary-light);
            position: relative;
            right: 0;
            margin-left: 16px;
            flex-shrink: 0;
            transition: background .2s ease;
        }

        .accordion-item.is-active .accordion-title::before {
            background: rgba(224, 122, 58, 0.15);
        }

        .accordion-title::after {
            content: '+';
            position: absolute;
            right: 24px;
            top: 50%;
            transform: translateY(-50%);
            font-size: 18px;
            font-weight: 400;
            color: var(--primary);
            line-height: 1;
            transition: transform .2s ease;
            width: 24px;
            height: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: transparent;
        }

        .accordion-item.is-active .accordion-title::after {
            content: '−';
            transform: translateY(-50%);
        }

        .accordion-content {
            padding: 0 24px 20px;
            font-size: 14px;
            line-height: 1.7;
            color: var(--text-secondary);
            border-top: 1px solid transparent;
        }

        .accordion-item.is-active .accordion-content {
            border-top-color: rgba(224, 122, 58, 0.15);
        }

        /* ===== CTA ===== */
        .category-cta {
            background: var(--accent);
            padding: 64px 0;
            color: #fff;
            position: relative;
            overflow: hidden;
        }

        .category-cta::before {
            content: '';
            position: absolute;
            top: -20px;
            left: -20px;
            width: 260px;
            height: 260px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            pointer-events: none;
        }

        .cta-inner {
            position: relative;
            z-index: 2;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
        }

        .cta-text {
            flex: 1 1 340px;
        }

        .cta-text h2 {
            font-size: 26px;
            font-weight: 700;
            line-height: 1.4;
            margin: 0 0 8px;
            color: #fff;
        }

        .cta-text p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.9);
            margin: 0;
        }

        .cta-form-wrap {
            flex: 1 1 360px;
        }

        .subscribe-form {
            display: flex;
            gap: 10px;
            background: #fff;
            border-radius: 12px;
            padding: 6px 6px 6px 16px;
            box-shadow: 0 8px 24px rgba(42, 54, 59, 0.15);
        }

        .subscribe-form input[type="email"] {
            flex: 1;
            border: none;
            background: transparent;
            font-size: 15px;
            color: var(--primary);
            height: 44px;
            outline: none;
            min-width: 0;
            box-shadow: none;
            margin: 0;
        }

        .subscribe-form input[type="email"]::placeholder {
            color: var(--text-muted);
        }

        .subscribe-form .btn {
            background: var(--primary);
            color: #fff;
            border-radius: 8px;
            padding: 10px 22px;
            font-size: 14px;
            white-space: nowrap;
            flex-shrink: 0;
        }

        .subscribe-form .btn:hover {
            background: #24322F;
            color: #fff;
            transform: translateY(-1px);
        }

        .subscribe-form .btn.is-loading {
            pointer-events: none;
            opacity: 0.8;
        }

        .cta-note {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.7);
            margin: 12px 0 0;
            padding-left: 4px;
        }

        /* ===== Sidebar ===== */
        .category-sidebar {
            position: sticky;
            top: 84px;
        }

        .sidebar-card {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            padding: 24px;
            margin-bottom: 24px;
        }

        .sidebar-card h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--primary);
            margin: 0 0 16px;
            padding-bottom: 12px;
            border-bottom: 1px solid var(--border);
        }

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

        .sidebar-list li {
            margin-bottom: 4px;
        }

        .sidebar-list a {
            display: block;
            padding: 9px 12px;
            border-radius: 8px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.4;
            transition: background .2s ease, color .2s ease;
        }

        .sidebar-list a:hover {
            background: var(--primary-light);
            color: var(--primary);
        }

        .sidebar-list a.active {
            background: var(--primary-light);
            color: var(--primary);
            font-weight: 600;
        }

        .ad-placeholder {
            border: 1px dashed var(--border);
            border-radius: var(--radius-md);
            height: 250px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            color: var(--text-muted);
            background: #FCFCF8;
            text-align: center;
            padding: 20px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary);
            color: #E8EFED;
            padding: 48px 0 40px;
            position: relative;
            margin-top: 0;
        }

        .footer-circuit {
            width: 100%;
            height: 60px;
            margin-bottom: 8px;
        }

        .footer-top {
            display: grid;
            grid-template-columns: 4fr 8fr;
            gap: 48px;
            padding: 24px 0 32px;
        }

        .footer-brand .logo span {
            color: #fff;
            font-size: 20px;
        }

        .footer-brand p {
            font-size: 13px;
            line-height: 1.7;
            color: #C6D0CD;
            margin: 16px 0 0;
            max-width: 280px;
        }

        .footer-links {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
        }

        .footer-links h4 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin: 0 0 16px;
        }

        .footer-links a {
            display: block;
            font-size: 14px;
            color: #C6D0CD;
            margin-bottom: 10px;
            line-height: 1.4;
            transition: color .2s ease;
        }

        .footer-links a:hover {
            color: #fff;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 13px;
            color: #A8B4B0;
        }

        /* ===== Mobile Tab Bar ===== */
        .mobile-tab-bar {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            height: 62px;
            background: var(--card);
            border-top: 1px solid var(--border);
            box-shadow: 0 -2px 12px rgba(42, 54, 59, 0.06);
            z-index: 200;
            align-items: center;
            justify-content: space-around;
            padding-bottom: env(safe-area-inset-bottom);
        }

        .tab-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 2px;
            font-size: 12px;
            color: var(--text-muted);
            flex: 1;
            height: 56px;
            transition: color .2s ease;
        }

        .tab-item svg {
            width: 22px;
            height: 22px;
        }

        .tab-item:hover,
        .tab-item.active {
            color: var(--primary);
        }

        .tab-download {
            background: var(--accent);
            color: #fff;
            width: 60px;
            height: 60px;
            border-radius: 50%;
            box-shadow: 0 6px 16px rgba(224, 122, 58, 0.35);
            margin-top: -18px;
            flex-direction: column;
            flex: 0 0 60px;
            font-size: 12px;
            font-weight: 600;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 1px;
            border: none;
            cursor: pointer;
            transition: background .2s ease, transform .2s ease;
        }

        .tab-download:hover {
            background: var(--accent-hover);
            color: #fff;
            transform: translateY(-1px);
        }

        .tab-download svg {
            width: 22px;
            height: 22px;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1023px) {
            .site-header {
                display: none;
            }

            .mobile-header {
                display: flex;
            }

            .mobile-tab-bar {
                display: flex;
            }

            body {
                padding-bottom: 80px;
            }

            .site-footer {
                padding-bottom: 70px;
            }

            .category-hero {
                padding: 36px 0 42px;
            }

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

            .category-modules {
                padding: 56px 0 48px;
            }

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

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

            .hud-scenes {
                grid-template-columns: 1fr;
            }

            .category-faq {
                padding: 56px 0;
            }

            .category-cta {
                padding: 48px 0;
            }

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

            .footer-links {
                grid-template-columns: repeat(3, 1fr);
                gap: 24px;
            }

            .category-card .card-media {
                min-height: 180px;
            }

            .category-card .card-content {
                padding: 24px;
            }
        }

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

            .hero-inner h1 {
                font-size: 24px;
            }

            .hero-inner p {
                font-size: 14px;
            }

            .category-card .card-content h3 {
                font-size: 18px;
            }

            .category-card .card-content p {
                font-size: 14px;
            }

            .hud-stats {
                gap: 12px;
            }

            .hud-stat {
                padding: 16px 12px;
            }

            .hud-stat .num {
                font-size: 24px;
            }

            .cta-inner {
                flex-direction: column;
                gap: 24px;
            }

            .cta-text {
                text-align: center;
            }

            .subscribe-form {
                flex-direction: column;
                background: transparent;
                padding: 0;
                box-shadow: none;
                gap: 10px;
            }

            .subscribe-form input[type="email"] {
                background: #fff;
                border-radius: 12px;
                padding: 0 16px;
                height: 46px;
                box-shadow: 0 2px 8px rgba(42, 54, 59, 0.08);
                width: 100%;
            }

            .subscribe-form .btn {
                width: 100%;
            }

            .cta-note {
                text-align: center;
            }

            .footer-links {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }

            .footer-bottom {
                flex-direction: column;
                gap: 4px;
            }

            .category-sidebar {
                position: static;
                margin-top: 48px;
            }

            .category-card-item {
                margin-bottom: 24px;
            }

            .category-card .card-media {
                min-height: 160px;
            }

            .accordion-title {
                font-size: 15px;
                padding: 16px 20px;
                padding-right: 48px;
            }

            .accordion-content {
                padding: 0 20px 16px;
            }
        }

/* roulang page: article */
:root{
    --primary:#2F4A44;
    --primary-light:#E8EFED;
    --accent:#E07A3A;
    --accent-hover:#C9682F;
    --bg:#F6F4EF;
    --card:#FFFFFF;
    --text:#2A363B;
    --text-secondary:#5A6A70;
    --text-muted:#8A948B;
    --border:#E5E1D8;
    --success:#3E6B5E;
    --warning:#C25E3A;
    --disabled:#B8B2A8;
    --radius-lg:16px;
    --radius-md:12px;
    --radius-sm:8px;
    --shadow-sm:0 2px 8px rgba(42,54,59,0.08);
    --shadow-lg:0 8px 24px rgba(42,54,59,0.12);
    --font-sans:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
    font-family:var(--font-sans);
    font-size:16px;
    line-height:1.8;
    color:var(--text);
    background:var(--bg);
    -webkit-font-smoothing:antialiased;
}
a{color:var(--primary);text-decoration:none;transition:color .3s ease}
a:hover{color:var(--accent)}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}
button,input,textarea{font-family:inherit}
.grid-container{max-width:1200px;padding-left:20px;padding-right:20px}

/* ===== 按钮 ===== */
.btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    border-radius:8px;
    padding:12px 28px;
    font-size:15px;
    font-weight:600;
    border:none;
    cursor:pointer;
    transition:all .3s ease;
    line-height:1.5;
    text-decoration:none;
}
.btn i{font-size:14px}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-hover);transform:translateY(-2px);box-shadow:0 6px 16px rgba(224,122,58,0.35);color:#fff}
.btn-primary:active{transform:translateY(-1px)}
.btn-secondary{background:transparent;border:1px solid var(--primary);color:var(--primary)}
.btn-secondary:hover{background:var(--primary-light);border-color:var(--primary);color:var(--primary)}
.btn-ghost{background:transparent;border:1px solid rgba(255,255,255,0.8);color:#fff}
.btn-ghost:hover{background:#fff;color:var(--primary);border-color:#fff}
.btn-sm{padding:10px 20px;font-size:14px}
.btn:focus-visible{outline:2px solid var(--accent);outline-offset:3px;box-shadow:0 0 0 4px rgba(224,122,58,0.18)}

/* ===== 顶部导航 ===== */
.site-header{
    background:#fff;
    border-bottom:1px solid var(--border);
    position:sticky;
    top:0;
    z-index:100;
    transition:box-shadow .3s ease;
}
.site-header.scrolled{box-shadow:0 2px 8px rgba(42,54,59,0.06)}
.header-inner{
    height:64px;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:32px;
}
.logo{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.logo-svg{width:32px;height:32px;display:block}
.logo span{font-size:20px;font-weight:700;color:var(--primary);letter-spacing:0.5px}
.nav-links{display:flex;gap:32px;align-items:center}
.nav-links a{
    font-size:15px;
    font-weight:500;
    color:var(--text-secondary);
    padding:20px 0;
    position:relative;
    transition:color .3s ease;
}
.nav-links a:hover{color:var(--primary)}
.nav-links a::after{
    content:"";
    position:absolute;
    left:0;right:0;bottom:12px;
    height:2px;
    background:var(--accent);
    transform:scaleX(0);
    transform-origin:center;
    transition:transform .3s ease;
}
.nav-links a:hover::after,
.nav-links a.active::after{transform:scaleX(1)}
.nav-links a.active{color:var(--primary);font-weight:600}
.menu-toggle{
    display:none;
    width:40px;height:40px;
    background:none;
    border:none;
    align-items:center;
    justify-content:center;
    cursor:pointer;
    color:var(--primary);
    border-radius:8px;
}
.menu-toggle:hover{background:var(--primary-light)}
.menu-toggle:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

/* 移动端下拉菜单 */
.mobile-menu{
    display:none;
    flex-direction:column;
    background:#fff;
    border-bottom:1px solid var(--border);
    box-shadow:var(--shadow-lg);
    padding:8px 0;
}
.mobile-menu.open{display:flex}
.mobile-menu a{
    padding:14px 24px;
    font-size:16px;
    font-weight:500;
    color:var(--text);
    border-bottom:1px solid var(--border);
}
.mobile-menu a:last-child{border-bottom:none}
.mobile-menu a:hover{background:var(--primary-light);color:var(--primary)}

/* ===== 面包屑 ===== */
.breadcrumb{
    display:flex;
    flex-wrap:wrap;
    gap:8px;
    align-items:center;
    font-size:13px;
    color:var(--text-muted);
    padding:24px 0 0;
    margin-bottom:16px;
}
.breadcrumb li{display:inline-flex;align-items:center;gap:8px}
.breadcrumb li+li::before{content:"/";color:var(--text-muted)}
.breadcrumb a{color:var(--text-secondary)}
.breadcrumb a:hover{color:var(--accent)}
.breadcrumb [aria-current="page"]{color:var(--primary);font-weight:600}

/* ===== 文章主体 ===== */
.article-col{background:transparent}
.article-card{
    background:var(--card);
    border:1px solid var(--border);
    border-radius:var(--radius-lg);
    padding:40px;
    box-shadow:var(--shadow-sm);
    margin-bottom:32px;
}
.article-card h1{
    font-size:30px;
    line-height:1.4;
    font-weight:700;
    color:var(--text);
    margin-bottom:16px;
}
.article-meta{
    display:flex;
    flex-wrap:wrap;
    gap:12px;
    align-items:center;
    font-size:13px;
    color:var(--text-muted);
    margin-bottom:20px;
    padding-bottom:20px;
    border-bottom:1px solid var(--border);
}
.article-author{font-weight:600;color:var(--text-secondary)}
.meta-dot{color:var(--border)}
.badge{
    display:inline-block;
    padding:4px 12px;
    border-radius:8px;
    font-size:12px;
    font-weight:600;
}
.badge-accent{background:var(--accent);color:#fff}
.badge-soft{background:var(--primary-light);color:var(--primary)}
.article-cover{margin-bottom:24px}
.article-cover img{
    width:100%;
    border-radius:var(--radius-lg);
    box-shadow:var(--shadow-sm);
    object-fit:cover;
    aspect-ratio:16/9;
}

/* 正文排版 */
.article-body{max-width:760px;margin-left:auto;margin-right:auto}
.article-body p{
    font-size:16px;
    line-height:1.9;
    color:var(--text);
    margin-bottom:20px;
}
.article-body h2{
    font-size:24px;
    font-weight:700;
    color:var(--text);
    margin:36px 0 14px;
    line-height:1.4;
}
.article-body h3{
    font-size:18px;
    font-weight:600;
    color:var(--primary);
    margin:32px 0 12px;
    line-height:1.5;
}
.article-body ul,
.article-body ol{
    margin:16px 0 20px;
    padding-left:24px;
    line-height:1.8;
}
.article-body ul li{list-style:disc;margin-bottom:6px}
.article-body ol li{list-style:decimal;margin-bottom:6px}
.article-body img{
    border-radius:12px;
    box-shadow:var(--shadow-sm);
    margin:20px auto;
}
.article-body blockquote{
    border-left:3px solid var(--primary);
    background:var(--primary-light);
    padding:16px 20px;
    border-radius:8px;
    color:var(--text-secondary);
    font-size:14px;
    line-height:1.7;
    margin:24px 0;
}
.article-body table{
    width:100%;
    border-collapse:collapse;
    margin:24px 0;
    border:1px solid var(--border);
    border-radius:8px;
    overflow:hidden;
}
.article-body th{
    background:var(--primary-light);
    color:var(--primary);
    font-weight:600;
    padding:12px 14px;
    font-size:14px;
    text-align:left;
    border-bottom:1px solid var(--border);
}
.article-body td{
    padding:12px 14px;
    font-size:14px;
    border-bottom:1px solid var(--border);
    color:var(--text-secondary);
    text-align:left;
}
.article-body tr:nth-child(odd) td{background:#f1f4f2}
.article-body tr:last-child td{border-bottom:none}
.article-body code{
    background:#24322F;
    color:#E8EFED;
    padding:12px 16px;
    border-radius:8px;
    display:block;
    font-family:"SFMono-Regular",Consolas,"Liberation Mono",monospace;
    font-size:14px;
    line-height:1.7;
    white-space:pre-wrap;
    margin:24px 0;
}
.article-body a{color:var(--accent);text-decoration:underline}
.article-body a:hover{color:var(--accent-hover)}

/* 文末 */
.post-footer{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:16px;
    margin-top:32px;
    padding-top:24px;
    border-top:1px solid var(--border);
    flex-wrap:wrap;
}
.post-footer a{font-size:14px;font-weight:600;color:var(--primary)}
.post-footer a:hover{color:var(--accent)}

/* ===== 未找到 ===== */
.not-found{
    background:var(--card);
    border:1px solid var(--border);
    border-radius:var(--radius-lg);
    padding:80px 40px;
    text-align:center;
    box-shadow:var(--shadow-sm);
}
.not-found h1{font-size:28px;font-weight:700;color:var(--primary);margin-bottom:16px}
.not-found p{font-size:15px;color:var(--text-secondary);margin-bottom:24px}
.not-found .btn{margin-top:8px}

/* ===== 侧边栏 ===== */
.sidebar{display:block}
.sidebar-card{
    background:var(--card);
    border:1px solid var(--border);
    border-radius:var(--radius-lg);
    padding:24px;
    box-shadow:var(--shadow-sm);
    margin-bottom:24px;
}
.sidebar-card h2{
    font-size:18px;
    font-weight:700;
    color:var(--primary);
    margin-bottom:16px;
    padding-bottom:12px;
    border-bottom:1px solid var(--border);
}
.sidebar-categories{
    display:flex;
    flex-direction:column;
    gap:4px;
}
.sidebar-categories a{
    display:block;
    padding:10px 14px;
    border-radius:8px;
    font-size:14px;
    font-weight:500;
    color:var(--text-secondary);
    transition:all .3s ease;
}
.sidebar-categories a:hover{background:var(--primary-light);color:var(--primary)}
.sidebar-categories a.active{background:var(--primary-light);color:var(--primary);font-weight:600}
.hot-list{
    counter-reset:hot;
    display:flex;
    flex-direction:column;
}
.hot-list li{
    counter-increment:hot;
    display:flex;
    align-items:baseline;
    gap:12px;
    padding:12px 0;
    border-bottom:1px solid var(--border);
}
.hot-list li:last-child{border-bottom:none}
.hot-list li::before{
    content:counter(hot, decimal-leading-zero);
    font-weight:700;
    color:var(--primary);
    font-size:14px;
    line-height:1;
}
.hot-list a{
    font-size:14px;
    color:var(--text-secondary);
    line-height:1.5;
    display:-webkit-box;
    -webkit-line-clamp:2;
    -webkit-box-orient:vertical;
    overflow:hidden;
}
.hot-list a:hover{color:var(--accent)}
.sidebar-ad{
    border:2px dashed var(--border);
    border-radius:var(--radius-md);
    height:250px;
    display:flex;
    align-items:center;
    justify-content:center;
    color:var(--text-muted);
    font-size:14px;
    background:var(--card);
}

/* ===== 相关推荐 ===== */
.related-posts{
    padding:32px 0 64px;
}
.related-posts h2{
    font-size:24px;
    font-weight:700;
    color:var(--text);
    margin-bottom:24px;
}
.related-card{
    display:flex;
    gap:16px;
    background:var(--card);
    border:1px solid var(--border);
    border-radius:var(--radius-lg);
    padding:16px;
    box-shadow:var(--shadow-sm);
    transition:all .3s ease;
    margin-bottom:20px;
    height:calc(100% - 20px);
}
.related-card:hover{
    transform:translateY(-2px);
    box-shadow:var(--shadow-lg);
    border-color:var(--accent);
}
.related-card img{
    width:120px;
    height:80px;
    object-fit:cover;
    border-radius:8px;
    flex-shrink:0;
}
.related-card-body{
    display:flex;
    flex-direction:column;
    justify-content:space-between;
    gap:8px;
}
.related-card-body h3{
    font-size:15px;
    font-weight:600;
    line-height:1.5;
    color:var(--text);
    display:-webkit-box;
    -webkit-line-clamp:2;
    -webkit-box-orient:vertical;
    overflow:hidden;
}
.related-card-body p{
    font-size:13px;
    color:var(--text-muted);
    line-height:1.6;
    display:-webkit-box;
    -webkit-line-clamp:2;
    -webkit-box-orient:vertical;
    overflow:hidden;
}
.related-card-body time{font-size:13px;color:var(--text-muted)}

/* ===== 页脚 ===== */
.site-footer{
    background:var(--primary);
    color:var(--primary-light);
    padding:56px 0 32px;
    position:relative;
}
.footer-circuit{
    display:block;
    width:100%;
    height:80px;
    position:absolute;
    top:0;
    left:0;
    pointer-events:none;
}
.footer-top{
    display:flex;
    gap:48px;
    flex-wrap:wrap;
    margin-bottom:40px;
}
.footer-brand{flex:1 1 280px}
.footer-brand .logo span{color:#fff}
.footer-brand p{
    font-size:14px;
    line-height:1.7;
    color:#C6D0CD;
    margin-top:16px;
}
.footer-links{
    flex:2 1 400px;
    display:flex;
    gap:48px;
    flex-wrap:wrap;
}
.footer-links h4{
    color:#fff;
    font-size:15px;
    font-weight:600;
    margin-bottom:16px;
}
.footer-links a{
    display:block;
    font-size:14px;
    color:#C6D0CD;
    padding:6px 0;
    transition:color .3s ease;
}
.footer-links a:hover{color:#fff}
.footer-bottom{
    display:flex;
    justify-content:space-between;
    align-items:center;
    flex-wrap:wrap;
    gap:12px;
    border-top:1px solid rgba(255,255,255,0.15);
    padding-top:24px;
    font-size:13px;
    color:#A8B4B0;
}

/* ===== 移动端底部 Tab ===== */
.mobile-tabbar{
    display:none;
    position:fixed;
    bottom:0;
    left:0;
    right:0;
    height:56px;
    background:#fff;
    border-top:1px solid var(--border);
    box-shadow:0 -2px 10px rgba(42,54,59,0.08);
    z-index:200;
}
.tab-item{
    flex:1;
    display:flex;
    flex-direction:column;
    align-items:center;
    justify-content:center;
    gap:2px;
    font-size:11px;
    font-weight:500;
    color:var(--text-muted);
    transition:color .3s ease;
}
.tab-item:hover{color:var(--primary)}
.tab-item.active{color:var(--primary)}
.tab-icon{width:22px;height:22px}
.tab-download{
    width:60px;
    height:60px;
    border-radius:50%;
    background:var(--accent);
    color:#fff;
    transform:translateY(-14px);
    box-shadow:0 6px 16px rgba(224,122,58,0.4);
    margin:0 auto;
    flex:none;
}
.tab-download:hover{background:var(--accent-hover);transform:translateY(-14px)}
.tab-download .tab-icon{width:22px;height:22px}

/* ===== 响应式 ===== */
@media (max-width:1023px){
    .nav-links,.header-cta{display:none}
    .menu-toggle{display:inline-flex}
    .sidebar{display:none}
    .mobile-tabbar{display:flex}
    body{padding-bottom:56px}
    .article-card{padding:28px}
    .article-card h1{font-size:26px}
    .related-card{margin-bottom:16px;height:auto}
    .footer-bottom{justify-content:center;text-align:center}
}
@media (max-width:639px){
    .grid-container{padding-left:16px;padding-right:16px}
    .article-card{padding:20px;border-radius:14px}
    .article-card h1{font-size:24px;line-height:1.35}
    .article-meta{gap:8px;flex-wrap:wrap}
    .article-body p{font-size:15px;line-height:1.8}
    .related-card{flex-direction:row}
    .related-card img{width:100px;height:70px}
    .footer-top{gap:32px}
    .footer-links{gap:24px}
    .footer-brand{flex:1 1 100%}
    .post-footer{flex-direction:column;align-items:flex-start}
    .not-found{padding:60px 20px}
}