/* roulang page: index */
:root {
        --primary: #0E7C6B;
        --primary-dark: #0A5D50;
        --primary-light: #E2F2EE;
        --accent: #FF7A45;
        --accent-dark: #E8622F;
        --bg: #F6F9F8;
        --card-bg: #FFFFFF;
        --text: #172420;
        --text-body: #4E5B56;
        --text-muted: #81908B;
        --border: #E2EAE7;
        --footer-bg: #0B2E28;
        --footer-text: #9DB8B0;
        --radius-lg: 16px;
        --radius: 12px;
        --radius-sm: 8px;
        --ratio: 1.618;
        --shadow: 0 4px 16px rgba(16, 40, 32, .06);
        --shadow-hover: 0 8px 24px rgba(16, 40, 32, .10);
        --spacing-xl: 96px;
        --spacing-lg: 72px;
        --spacing-md: 48px;
        --spacing-sm: 32px;
        --transition: all .25s cubic-bezier(.4, 0, .2, 1);
    }

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

    html {
        scroll-behavior: smooth;
    }

    body {
        font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, sans-serif;
        background: var(--bg);
        color: var(--text);
        line-height: 1.8;
        font-size: 16px;
        overflow-x: hidden;
    }

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

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

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

    .container {
        max-width: 1200px;
        padding-left: 24px;
        padding-right: 24px;
    }

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

    .section-pad-md {
        padding: var(--spacing-lg) 0;
    }

    .section-title {
        font-size: 32px;
        font-weight: 700;
        line-height: 1.3;
        text-align: center;
        margin-bottom: 16px;
        color: var(--text);
    }

    .section-subtitle {
        font-size: 16px;
        color: var(--text-muted);
        text-align: center;
        max-width: 640px;
        margin: 0 auto 48px;
        line-height: 1.7;
    }

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

    .btn {
        border-radius: var(--radius-sm);
        font-weight: 600;
        transition: var(--transition);
    }

    .btn:focus {
        box-shadow: 0 0 0 2px rgba(14, 124, 107, .2);
    }

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

    .btn-primary:hover,
    .btn-primary:focus {
        background: var(--primary-dark);
        border-color: var(--primary-dark);
        transform: translateY(-1px);
    }

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

    .btn-accent:hover,
    .btn-accent:focus {
        background: var(--accent-dark);
        border-color: var(--accent-dark);
        color: #fff;
        transform: translateY(-1px);
    }

    .btn-outline-primary {
        border-color: var(--primary);
        color: var(--primary);
    }

    .btn-outline-primary:hover,
    .btn-outline-primary:focus {
        background: var(--primary);
        border-color: var(--primary);
        color: #fff;
    }

    .btn-lg-custom {
        padding: 14px 36px;
        font-size: 16px;
        border-radius: 10px;
        height: 52px;
        line-height: 22px;
    }

    /* ===== 导航 ===== */
    .main-nav {
        background: #fff;
        min-height: 64px;
        border-bottom: 1px solid var(--border);
        box-shadow: 0 1px 6px rgba(16, 40, 32, .04);
        padding: 0;
        z-index: 1030;
    }

    .main-nav .navbar-brand {
        display: flex;
        align-items: center;
        gap: 8px;
        padding: 8px 0;
    }

    .brand-icon {
        width: 36px;
        height: 36px;
        background: var(--primary);
        border-radius: 50%;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        color: #fff;
        font-size: 16px;
        flex-shrink: 0;
        background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
        box-shadow: 0 2px 8px rgba(14, 124, 107, .25);
    }

    .brand-text {
        font-size: 18px;
        font-weight: 600;
        color: var(--text);
        letter-spacing: .5px;
        line-height: 1.2;
    }

    .main-nav .navbar-nav {
        gap: 4px;
    }

    .main-nav .nav-link {
        font-size: 15px;
        color: var(--text-body);
        padding: 8px 18px !important;
        border-radius: var(--radius-sm);
        position: relative;
        font-weight: 500;
        transition: var(--transition);
    }

    .main-nav .nav-link:hover {
        color: var(--primary);
        background: var(--primary-light);
    }

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

    .main-nav .nav-link.active::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 18px;
        right: 18px;
        height: 2px;
        background: var(--primary);
        border-radius: 2px;
    }

    .search-wrap {
        position: relative;
        width: 200px;
    }

    .search-input {
        width: 100%;
        height: 38px;
        border-radius: 20px;
        background: #F2F6F5;
        border: 1px solid transparent;
        padding: 0 40px 0 14px;
        font-size: 14px;
        transition: var(--transition);
        color: var(--text);
    }

    .search-input:focus {
        border-color: var(--primary);
        box-shadow: 0 0 0 4px rgba(14, 124, 107, .12);
        background: #fff;
        outline: none;
    }

    .search-icon {
        position: absolute;
        right: 14px;
        top: 50%;
        transform: translateY(-50%);
        font-size: 14px;
        color: var(--text-muted);
        pointer-events: none;
    }

    .btn-download-nav {
        height: 40px;
        padding: 0 18px;
        font-size: 14px;
        border-radius: var(--radius-sm);
        display: inline-flex;
        align-items: center;
        gap: 6px;
        background: var(--primary);
        border-color: var(--primary);
        color: #fff;
        white-space: nowrap;
    }

    .btn-download-nav:hover,
    .btn-download-nav:focus {
        background: var(--primary-dark);
        border-color: var(--primary-dark);
        color: #fff;
        transform: translateY(-1px);
    }

    /* ===== Hero ===== */
    .hero {
        position: relative;
        background: linear-gradient(135deg, rgba(10, 93, 80, .92) 0%, rgba(14, 124, 107, .78) 50%, rgba(14, 124, 107, .35) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
        padding: 110px 0 90px;
        color: #fff;
        overflow: hidden;
    }

    .hero::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 0;
        right: 0;
        height: 60px;
        background: linear-gradient(to top, var(--bg), transparent);
        z-index: 1;
    }

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

    .hero-content {
        padding-right: 24px;
    }

    .hero-title {
        font-size: 48px;
        font-weight: 700;
        line-height: 1.25;
        margin-bottom: 24px;
        letter-spacing: 1px;
        color: #fff;
        text-shadow: 0 2px 12px rgba(0, 0, 0, .15);
    }

    .hero-subtitle {
        font-size: 17px;
        line-height: 1.8;
        color: rgba(255, 255, 255, .9);
        margin-bottom: 32px;
        max-width: 480px;
        font-weight: 400;
    }

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

    .hero-buttons .btn-download-hero {
        padding: 15px 38px;
        font-size: 16px;
        border-radius: 10px;
        font-weight: 600;
        background: #fff;
        color: var(--primary);
        border: 1px solid #fff;
        height: 52px;
        display: inline-flex;
        align-items: center;
        gap: 8px;
        transition: var(--transition);
    }

    .hero-buttons .btn-download-hero:hover,
    .hero-buttons .btn-download-hero:focus {
        background: var(--primary-light);
        border-color: var(--primary-light);
        color: var(--primary-dark);
        transform: translateY(-1px);
    }

    .hero-buttons .btn-feature-hero {
        padding: 15px 32px;
        font-size: 16px;
        border-radius: 10px;
        font-weight: 500;
        background: transparent;
        color: #fff;
        border: 1px solid rgba(255, 255, 255, .6);
        height: 52px;
        display: inline-flex;
        align-items: center;
        gap: 8px;
        transition: var(--transition);
    }

    .hero-buttons .btn-feature-hero:hover,
    .hero-buttons .btn-feature-hero:focus {
        background: rgba(255, 255, 255, .1);
        border-color: #fff;
        color: #fff;
        transform: translateY(-1px);
    }

    .hero-visual {
        position: relative;
        display: flex;
        justify-content: center;
        align-items: center;
    }

    .device-frame {
        background: rgba(255, 255, 255, .1);
        border-radius: 20px;
        border: 1px solid rgba(255, 255, 255, .25);
        padding: 16px;
        max-width: 480px;
        width: 100%;
        backdrop-filter: blur(4px);
    }

    .device-frame .device-top {
        display: flex;
        gap: 6px;
        margin-bottom: 12px;
        padding: 0 4px;
    }

    .device-frame .device-top span {
        width: 10px;
        height: 10px;
        border-radius: 50%;
        background: rgba(255, 255, 255, .6);
        display: block;
    }

    .device-frame img {
        border-radius: 12px;
        width: 100%;
        object-fit: cover;
        box-shadow: 0 8px 40px rgba(0, 0, 0, .2);
    }

    .device-badges {
        display: flex;
        gap: 12px;
        margin-top: 16px;
        flex-wrap: wrap;
    }

    .badge-chip {
        background: rgba(255, 255, 255, .18);
        border: 1px solid rgba(255, 255, 255, .25);
        border-radius: 30px;
        padding: 6px 16px;
        font-size: 13px;
        color: #fff;
        display: inline-flex;
        align-items: center;
        gap: 6px;
        backdrop-filter: blur(2px);
    }

    .badge-chip i {
        color: #FFD166;
    }

    .badge-chip .fa-users {
        color: #A5E8D0;
    }

    /* ===== 价值横条 ===== */
    .value-strip {
        background: #fff;
        border-bottom: 1px solid var(--border);
        padding: 28px 0;
    }

    .value-strip-inner {
        display: flex;
        justify-content: space-between;
        gap: 16px;
        flex-wrap: wrap;
    }

    .value-item-strip {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 15px;
        color: var(--text-body);
        font-weight: 500;
        flex: 1;
        min-width: 140px;
    }

    .value-item-strip i {
        color: var(--primary);
        font-size: 18px;
        width: 36px;
        height: 36px;
        border-radius: 50%;
        background: var(--primary-light);
        display: inline-flex;
        align-items: center;
        justify-content: center;
        flex-shrink: 0;
    }

    .value-item-strip span {
        font-size: 13px;
        color: var(--text-muted);
        font-weight: 400;
        display: block;
        line-height: 1.4;
    }

    .value-item-strip strong {
        display: block;
        font-weight: 600;
        color: var(--text);
        font-size: 15px;
        line-height: 1.3;
    }

    /* ===== 功能特色 ===== */
    .features-section {
        padding: var(--spacing-xl) 0;
    }

    .feature-row {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 32px 48px;
        max-width: 960px;
        margin: 0 auto;
    }

    .feature-item {
        display: flex;
        gap: 20px;
        padding: 24px 0;
        border-bottom: 1px solid var(--border);
        transition: var(--transition);
    }

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

    .feature-item:hover {
        transform: translateX(4px);
    }

    .feature-num {
        width: 48px;
        height: 48px;
        border-radius: var(--radius-sm);
        background: var(--primary-light);
        color: var(--primary);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 18px;
        font-weight: 700;
        flex-shrink: 0;
        font-family: 'Inter', sans-serif;
        line-height: 1;
    }

    .feature-info h3 {
        font-size: 20px;
        font-weight: 600;
        margin-bottom: 6px;
        color: var(--text);
    }

    .feature-info p {
        font-size: 14px;
        color: var(--text-body);
        line-height: 1.7;
        margin: 0;
    }

    /* ===== 轮播 ===== */
    .screenshots-section {
        background: #fff;
        padding: var(--spacing-xl) 0;
        border-top: 1px solid var(--border);
        border-bottom: 1px solid var(--border);
    }

    .carousel-wrap {
        max-width: 1100px;
        margin: 0 auto;
        position: relative;
    }

    .screenshot-card {
        background: var(--card-bg);
        border: 1px solid var(--border);
        border-radius: var(--radius-lg);
        box-shadow: var(--shadow);
        padding: 20px;
        max-width: 860px;
        margin: 0 auto;
        transition: var(--transition);
    }

    .screenshot-card .shot-img {
        border-radius: 12px;
        overflow: hidden;
        margin-bottom: 16px;
        background: #f0f4f3;
    }

    .screenshot-card .shot-img img {
        width: 100%;
        height: auto;
        object-fit: cover;
        max-height: 520px;
    }

    .screenshot-card h3 {
        font-size: 20px;
        font-weight: 600;
        margin-bottom: 6px;
        color: var(--text);
    }

    .screenshot-card p {
        font-size: 14px;
        color: var(--text-muted);
        line-height: 1.7;
        margin: 0;
    }

    .carousel-indicators {
        bottom: -32px;
    }

    .carousel-indicators [data-bs-target] {
        width: 8px;
        height: 8px;
        border-radius: 50%;
        background: var(--primary);
        opacity: .35;
        border: none;
        transition: var(--transition);
    }

    .carousel-indicators .active {
        opacity: 1;
        width: 24px;
        border-radius: 4px;
    }

    .carousel-control-prev,
    .carousel-control-next {
        width: 48px;
        height: 48px;
        top: 50%;
        transform: translateY(-50%);
        bottom: auto;
        opacity: .6;
        background: rgba(23, 36, 32, .08);
        border-radius: 50%;
        transition: var(--transition);
    }

    .carousel-control-prev:hover,
    .carousel-control-next:hover {
        opacity: 1;
        background: rgba(23, 36, 32, .2);
    }

    .carousel-control-prev {
        left: 0;
    }

    .carousel-control-next {
        right: 0;
    }

    .carousel-control-prev i,
    .carousel-control-next i {
        color: var(--text);
        font-size: 18px;
    }

    /* ===== 系统要求 ===== */
    .sys-req-section {
        padding: var(--spacing-xl) 0;
    }

    .req-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 40px;
        max-width: 960px;
        margin: 0 auto;
    }

    .req-block {
        background: #fff;
        border: 1px solid var(--border);
        border-radius: var(--radius-lg);
        padding: 32px;
        box-shadow: var(--shadow);
    }

    .req-block h3 {
        font-size: 22px;
        font-weight: 600;
        margin-bottom: 20px;
        color: var(--text);
        display: flex;
        align-items: center;
        gap: 10px;
    }

    .req-block h3 i {
        color: var(--primary);
        font-size: 18px;
        width: 34px;
        height: 34px;
        border-radius: 50%;
        background: var(--primary-light);
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }

    .req-item {
        display: flex;
        justify-content: space-between;
        align-items: flex-start;
        padding: 12px 0;
        border-bottom: 1px dashed rgba(226, 234, 231, .8);
        margin: 0;
    }

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

    .req-item dt {
        font-size: 14px;
        font-weight: 500;
        color: var(--text-muted);
        flex-shrink: 0;
        width: 80px;
    }

    .req-item dd {
        font-size: 14px;
        color: var(--text-body);
        text-align: right;
        margin: 0;
    }

    .browser-note {
        max-width: 960px;
        margin: 32px auto 0;
        background: var(--primary-light);
        border-radius: var(--radius);
        padding: 16px 24px;
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 16px;
        flex-wrap: wrap;
        font-size: 14px;
        color: var(--text-body);
        text-align: center;
    }

    .browser-note i {
        color: var(--primary);
        font-size: 16px;
    }

    .browser-icons {
        display: inline-flex;
        gap: 8px;
    }

    .browser-icons span {
        background: #fff;
        border: 1px solid var(--border);
        border-radius: 20px;
        padding: 4px 14px;
        font-size: 13px;
        color: var(--text-body);
        font-weight: 500;
    }

    /* ===== 评价墙 ===== */
    .reviews-section {
        background: #fff;
        padding: var(--spacing-xl) 0;
        border-top: 1px solid var(--border);
    }

    .reviews-wrapper {
        display: grid;
        grid-template-columns: 280px 1fr;
        gap: 48px;
        max-width: 1100px;
        margin: 0 auto;
    }

    .review-summary {
        text-align: center;
        padding: 32px 24px;
        background: var(--bg);
        border-radius: var(--radius-lg);
        border: 1px solid var(--border);
        height: fit-content;
        position: sticky;
        top: 80px;
    }

    .review-score {
        font-size: 56px;
        font-weight: 700;
        color: var(--primary);
        line-height: 1.1;
        font-family: 'Inter', sans-serif;
    }

    .review-stars {
        color: var(--accent);
        font-size: 18px;
        margin: 8px 0 12px;
        letter-spacing: 4px;
    }

    .review-count {
        font-size: 14px;
        color: var(--text-muted);
    }

    .review-cards {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 24px;
    }

    .review-card {
        background: var(--bg);
        border: 1px solid var(--border);
        border-radius: var(--radius);
        padding: 24px;
        display: flex;
        flex-direction: column;
        gap: 12px;
        transition: var(--transition);
    }

    .review-card:nth-child(2) {
        transform: translateY(12px);
    }

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

    .review-card:nth-child(2):hover {
        transform: translateY(4px) translateY(12px);
    }

    .review-card-top {
        display: flex;
        align-items: center;
        gap: 12px;
    }

    .avatar {
        width: 40px;
        height: 40px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        font-weight: 600;
        font-size: 14px;
        color: #fff;
        flex-shrink: 0;
    }

    .avatar.avatar-1 {
        background: linear-gradient(135deg, #0E7C6B, #0A5D50);
    }

    .avatar.avatar-2 {
        background: linear-gradient(135deg, #FF7A45, #E8622F);
    }

    .avatar.avatar-3 {
        background: linear-gradient(135deg, #4E889E, #3B6B7D);
    }

    .avatar.avatar-4 {
        background: linear-gradient(135deg, #7A8B5C, #5F7044);
    }

    .review-user {
        font-size: 15px;
        font-weight: 600;
        color: var(--text);
    }

    .review-time {
        font-size: 12px;
        color: var(--text-muted);
    }

    .review-stars-sm {
        color: var(--accent);
        font-size: 13px;
        letter-spacing: 2px;
    }

    .review-text {
        font-size: 14px;
        color: var(--text-body);
        line-height: 1.7;
        margin-bottom: 0;
    }

    /* ===== 资讯 ===== */
    .news-section {
        padding: var(--spacing-xl) 0;
    }

    .news-header {
        display: flex;
        justify-content: space-between;
        align-items: center;
        margin-bottom: 36px;
    }

    .news-header .section-title {
        margin-bottom: 0;
        text-align: left;
    }

    .more-link {
        font-size: 14px;
        font-weight: 500;
        color: var(--primary);
        display: inline-flex;
        align-items: center;
        gap: 6px;
    }

    .more-link:hover {
        color: var(--primary-dark);
    }

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

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

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

    .news-card-img {
        width: 100%;
        height: 180px;
        object-fit: cover;
        border-radius: 0;
    }

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

    .news-badge {
        display: inline-block;
        background: var(--primary-light);
        color: var(--primary);
        font-size: 12px;
        font-weight: 500;
        border-radius: 6px;
        padding: 3px 10px;
        margin-bottom: 12px;
        align-self: flex-start;
    }

    .news-card h3 {
        font-size: 17px;
        font-weight: 600;
        line-height: 1.5;
        margin-bottom: 8px;
    }

    .news-card h3 a {
        color: var(--text);
    }

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

    .news-card p {
        font-size: 14px;
        color: var(--text-body);
        line-height: 1.7;
        margin-bottom: 14px;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }

    .news-meta {
        display: flex;
        justify-content: space-between;
        align-items: center;
        font-size: 13px;
        color: var(--text-muted);
        margin-top: auto;
        padding-top: 8px;
        border-top: 1px solid var(--border);
    }

    .news-meta .news-date i {
        margin-right: 4px;
        font-size: 12px;
    }

    .news-meta .read-more {
        font-size: 13px;
        font-weight: 500;
        color: var(--primary);
        display: inline-flex;
        align-items: center;
        gap: 4px;
    }

    .news-meta .read-more:hover {
        color: var(--primary-dark);
    }

    .empty-state {
        background: var(--primary-light);
        border-radius: var(--radius);
        padding: 48px 24px;
        text-align: center;
        font-size: 15px;
        color: var(--text-body);
        grid-column: 1 / -1;
        border: 1px dashed rgba(14, 124, 107, .3);
    }

    /* ===== 下载CTA ===== */
    .download-cta {
        background: linear-gradient(135deg, var(--primary-dark), var(--primary)), url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
        padding: var(--spacing-xl) 0;
        text-align: center;
        color: #fff;
        position: relative;
    }

    .download-cta::before {
        content: '';
        position: absolute;
        inset: 0;
        background: rgba(10, 93, 80, .35);
        border-radius: inherit;
    }

    .download-cta .container {
        position: relative;
        z-index: 2;
    }

    .download-title {
        font-size: 36px;
        font-weight: 700;
        line-height: 1.3;
        margin-bottom: 16px;
        color: #fff;
    }

    .download-subtitle {
        font-size: 16px;
        color: rgba(255, 255, 255, .85);
        margin-bottom: 40px;
        max-width: 600px;
        margin-left: auto;
        margin-right: auto;
    }

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

    .btn-download-white {
        background: #fff;
        color: var(--primary);
        border: 1px solid #fff;
        height: 52px;
        padding: 0 36px;
        border-radius: 10px;
        font-weight: 600;
        font-size: 16px;
        display: inline-flex;
        align-items: center;
        gap: 8px;
        transition: var(--transition);
    }

    .btn-download-white:hover,
    .btn-download-white:focus {
        background: var(--primary-light);
        color: var(--primary-dark);
        border-color: var(--primary-light);
        transform: translateY(-1px);
        box-shadow: 0 8px 24px rgba(0, 0, 0, .1);
    }

    .btn-outline-white {
        background: transparent;
        color: #fff;
        border: 1px solid rgba(255, 255, 255, .6);
        height: 52px;
        padding: 0 32px;
        border-radius: 10px;
        font-weight: 500;
        font-size: 16px;
        display: inline-flex;
        align-items: center;
        gap: 8px;
        transition: var(--transition);
    }

    .btn-outline-white:hover,
    .btn-outline-white:focus {
        background: rgba(255, 255, 255, .12);
        color: #fff;
        border-color: #fff;
        transform: translateY(-1px);
    }

    .qr-placeholder {
        display: inline-flex;
        flex-direction: column;
        align-items: center;
        gap: 6px;
        background: rgba(255, 255, 255, .12);
        border: 1px solid rgba(255, 255, 255, .3);
        border-radius: 10px;
        padding: 10px 16px;
        font-size: 12px;
        color: #fff;
        min-width: 80px;
        transition: var(--transition);
    }

    .qr-placeholder i {
        font-size: 22px;
        color: #fff;
    }

    .qr-placeholder:hover {
        background: rgba(255, 255, 255, .2);
    }

    /* ===== FAQ ===== */
    .faq-section {
        padding: var(--spacing-xl) 0;
    }

    .faq-wrap {
        max-width: 760px;
        margin: 0 auto;
    }

    .faq-item {
        background: #fff;
        border: 1px solid var(--border);
        border-radius: var(--radius);
        margin-bottom: 16px;
        overflow: hidden;
        transition: var(--transition);
    }

    .faq-item:hover {
        box-shadow: var(--shadow);
    }

    .faq-question {
        width: 100%;
        background: none;
        border: none;
        padding: 20px 24px;
        display: flex;
        justify-content: space-between;
        align-items: center;
        font-size: 15px;
        font-weight: 600;
        color: var(--text);
        cursor: pointer;
        text-align: left;
        transition: var(--transition);
        border-radius: 0;
    }

    .faq-question:hover,
    .faq-question:focus {
        color: var(--primary);
        background: var(--primary-light);
        outline: none;
    }

    .faq-question .faq-arrow {
        transition: transform .3s ease;
        color: var(--text-muted);
        font-size: 14px;
        flex-shrink: 0;
    }

    .faq-item.open .faq-arrow {
        transform: rotate(180deg);
        color: var(--primary);
    }

    .faq-item.open .faq-question {
        color: var(--primary);
    }

    .faq-answer {
        display: none;
        padding: 0 24px 20px;
        font-size: 14px;
        color: var(--text-body);
        line-height: 1.8;
        border-top: 1px solid var(--border);
        padding-top: 12px;
        background: #fff;
    }

    .faq-item.open .faq-answer {
        display: block;
    }

    /* ===== 页脚 ===== */
    .footer {
        background: var(--footer-bg);
        color: var(--footer-text);
        padding: 64px 0 0;
    }

    .footer-grid {
        display: grid;
        grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
        gap: 40px;
        padding-bottom: 48px;
    }

    .footer-brand-text {
        font-size: 22px;
        font-weight: 600;
        color: #fff;
        display: flex;
        align-items: center;
        gap: 10px;
        margin-bottom: 16px;
    }

    .footer-brand-text .brand-icon {
        background: var(--primary);
        box-shadow: none;
    }

    .footer-desc {
        font-size: 14px;
        line-height: 1.7;
        margin-bottom: 20px;
        max-width: 260px;
        color: rgba(255, 255, 255, .6);
    }

    .social-icons {
        display: flex;
        gap: 10px;
    }

    .social-icons a {
        width: 36px;
        height: 36px;
        border-radius: 50%;
        background: rgba(255, 255, 255, .08);
        display: inline-flex;
        align-items: center;
        justify-content: center;
        color: rgba(255, 255, 255, .7);
        font-size: 14px;
        transition: var(--transition);
    }

    .social-icons a:hover {
        background: var(--primary);
        color: #fff;
        transform: translateY(-2px);
    }

    .footer-title {
        font-size: 16px;
        font-weight: 600;
        color: #fff;
        margin-bottom: 20px;
    }

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

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

    .footer-links a {
        font-size: 14px;
        color: rgba(255, 255, 255, .6);
        transition: var(--transition);
    }

    .footer-links a:hover {
        color: #fff;
        padding-left: 4px;
    }

    .footer-contact p {
        font-size: 14px;
        color: rgba(255, 255, 255, .6);
        margin-bottom: 10px;
        display: flex;
        align-items: center;
        gap: 10px;
    }

    .footer-contact i {
        width: 28px;
        height: 28px;
        border-radius: 50%;
        background: rgba(255, 255, 255, .08);
        display: inline-flex;
        align-items: center;
        justify-content: center;
        font-size: 12px;
        color: var(--primary-light);
        flex-shrink: 0;
    }

    .copyright {
        border-top: 1px solid rgba(255, 255, 255, .08);
        padding: 20px 0;
        text-align: center;
        font-size: 13px;
        color: rgba(255, 255, 255, .4);
        line-height: 1.6;
    }

    .copyright a {
        color: rgba(255, 255, 255, .5);
    }

    .copyright a:hover {
        color: #fff;
    }

    /* ===== 响应式 ===== */
    @media (max-width: 991.98px) {
        .main-nav .navbar-collapse {
            background: #fff;
            padding: 16px 24px;
            border-top: 1px solid var(--border);
            box-shadow: 0 8px 24px rgba(16, 40, 32, .08);
        }

        .main-nav .navbar-nav {
            gap: 4px;
            margin: 16px 0;
        }

        .main-nav .nav-link {
            padding: 10px 12px !important;
        }

        .main-nav .nav-link.active::after {
            left: 12px;
            right: auto;
            width: 24px;
        }

        .nav-right {
            display: flex;
            flex-direction: column;
            align-items: stretch;
            gap: 12px;
        }

        .search-wrap {
            width: 100%;
        }

        .btn-download-nav {
            justify-content: center;
            width: 100%;
        }

        .hero {
            padding: 72px 0 60px;
        }

        .hero-title {
            font-size: 36px;
        }

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

        .reviews-wrapper {
            grid-template-columns: 1fr;
        }

        .review-summary {
            position: static;
            padding: 24px;
        }

        .review-cards {
            grid-template-columns: 1fr 1fr;
        }

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

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

    @media (max-width: 767.98px) {
        .section-pad,
        .section-pad-md,
        .features-section,
        .screenshots-section,
        .sys-req-section,
        .reviews-section,
        .news-section,
        .faq-section,
        .download-cta {
            padding: 64px 0;
        }

        .section-title {
            font-size: 28px;
        }

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

        .hero-buttons {
            flex-direction: column;
        }

        .hero-buttons .btn-download-hero,
        .hero-buttons .btn-feature-hero {
            width: 100%;
            justify-content: center;
        }

        .feature-row {
            grid-template-columns: 1fr;
            gap: 24px;
        }

        .req-grid {
            grid-template-columns: 1fr;
            gap: 24px;
        }

        .req-block {
            padding: 24px;
        }

        .review-cards {
            grid-template-columns: 1fr;
        }

        .review-card:nth-child(2) {
            transform: none;
        }

        .review-card:nth-child(2):hover {
            transform: translateY(2px);
        }

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

        .news-header {
            flex-direction: row;
            align-items: center;
        }

        .download-title {
            font-size: 28px;
        }

        .download-buttons {
            flex-direction: column;
        }

        .btn-download-white,
        .btn-outline-white {
            width: 100%;
            justify-content: center;
        }

        .qr-placeholder {
            width: 100%;
            justify-content: center;
        }

        .value-strip-inner {
            flex-direction: column;
        }

        .value-item-strip {
            min-width: 100%;
        }
    }

    @media (max-width: 575.98px) {
        .container {
            padding-left: 20px;
            padding-right: 20px;
        }

        .hero-title {
            font-size: 28px;
        }

        .hero-subtitle {
            font-size: 15px;
        }

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

        .req-item {
            flex-direction: column;
            gap: 4px;
        }

        .req-item dd {
            text-align: left;
        }

        .browser-note {
            flex-direction: column;
            gap: 8px;
        }

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

/* roulang page: article */
:root {
            --primary: #0E7C6B;
            --primary-dark: #0A5D50;
            --primary-light: #E2F2EE;
            --accent: #FF7A45;
            --accent-dark: #E8622F;
            --bg: #F6F9F8;
            --card-bg: #FFFFFF;
            --text-heading: #172420;
            --text-body: #4E5B56;
            --text-muted: #81908B;
            --border: #E2EAE7;
            --radius: 12px;
            --shadow: 0 4px 16px rgba(16, 40, 32, .06);
            --shadow-hover: 0 8px 24px rgba(16, 40, 32, .10);
            --footer-bg: #0B2E28;
            --transition: all .25s ease;
        }

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

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

        a {
            text-decoration: none;
            color: var(--primary);
            transition: var(--transition);
        }
        a:hover { color: var(--primary-dark); }

        img { max-width: 100%; }

        .container { max-width: 1200px; }

        .btn {
            border-radius: 10px;
            font-weight: 500;
            transition: var(--transition);
        }
        .btn:focus {
            box-shadow: 0 0 0 .25rem rgba(14, 124, 107, .15);
        }

        .btn-primary {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: var(--shadow-hover);
        }

        .btn-outline-primary {
            border: 2px solid var(--primary);
            color: var(--primary);
            background: transparent;
        }
        .btn-outline-primary:hover {
            background: var(--primary-light);
            border-color: var(--primary);
            color: var(--primary-dark);
            transform: translateY(-1px);
        }

        .btn-accent {
            background: var(--accent);
            border-color: var(--accent);
            color: #fff;
        }
        .btn-accent:hover {
            background: var(--accent-dark);
            border-color: var(--accent-dark);
            color: #fff;
            transform: translateY(-1px);
        }

        /* ===== Header / Nav ===== */
        .main-nav {
            background: #fff;
            border-bottom: 1px solid var(--border);
            box-shadow: 0 1px 6px rgba(16, 40, 32, .04);
            padding: 0;
            min-height: 64px;
        }
        .main-nav .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 0;
        }
        .brand-icon {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            flex: 0 0 38px;
        }
        .brand-text {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-heading);
            letter-spacing: .5px;
        }
        .main-nav .navbar-nav .nav-link {
            font-size: 15px;
            font-weight: 400;
            color: var(--text-body);
            padding: 10px 18px;
            position: relative;
            border-radius: 6px;
        }
        .main-nav .navbar-nav .nav-link:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .main-nav .navbar-nav .nav-link.active {
            color: var(--primary);
            font-weight: 600;
            background: rgba(14, 124, 107, .08);
        }
        .main-nav .navbar-nav .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 18px;
            right: 18px;
            height: 3px;
            border-radius: 3px;
            background: var(--primary);
        }
        .search-wrap {
            position: relative;
            width: 200px;
        }
        .search-input {
            border-radius: 20px;
            border: 1px solid transparent;
            background: #F2F6F5;
            font-size: 14px;
            padding: 8px 40px 8px 18px;
            transition: var(--transition);
            color: var(--text-body);
        }
        .search-input:focus {
            border-color: var(--primary);
            background: #fff;
            box-shadow: 0 0 0 4px rgba(14, 124, 107, .12);
            color: var(--text-heading);
        }
        .search-input::placeholder {
            color: var(--text-muted);
        }
        .search-icon {
            position: absolute;
            top: 50%;
            right: 14px;
            transform: translateY(-50%);
            color: var(--text-muted);
            font-size: 14px;
            pointer-events: none;
        }
        .btn-download-nav {
            height: 40px;
            border-radius: 8px;
            padding: 0 20px;
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 500;
        }
        .navbar-toggler {
            border-color: var(--border);
            border-radius: 8px;
        }
        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(14, 124, 107, .15);
        }
        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='%23172420' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb-bar {
            padding: 24px 0 8px;
            background: var(--bg);
        }
        .breadcrumb-bar .breadcrumb {
            margin-bottom: 0;
            font-size: 14px;
        }
        .breadcrumb-bar .breadcrumb-item a {
            color: var(--text-muted);
        }
        .breadcrumb-bar .breadcrumb-item a:hover {
            color: var(--primary);
        }
        .breadcrumb-bar .breadcrumb-item.active {
            color: var(--text-heading);
            font-weight: 500;
        }
        .breadcrumb-bar .breadcrumb-item + .breadcrumb-item::before {
            color: var(--text-muted);
        }

        /* ===== Article Main ===== */
        .article-main {
            padding: 32px 0 64px;
        }
        .article-wrapper {
            max-width: 860px;
            margin: 0 auto;
        }
        .article-card {
            background: var(--card-bg);
            border-radius: 16px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            padding: 48px 56px;
        }
        .article-card h1 {
            font-size: 32px;
            font-weight: 700;
            color: var(--text-heading);
            line-height: 1.4;
            margin-bottom: 20px;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            padding-bottom: 24px;
            border-bottom: 1px solid var(--border);
            margin-bottom: 32px;
            font-size: 14px;
            color: var(--text-muted);
        }
        .article-meta span {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-meta i {
            color: var(--primary);
            font-size: 15px;
        }
        .article-meta a {
            color: var(--text-muted);
            font-weight: 500;
        }
        .article-meta a:hover {
            color: var(--primary);
        }

        /* Article Content */
        .article-content {
            font-size: 16px;
            line-height: 1.9;
            color: var(--text-body);
        }
        .article-content p {
            margin-bottom: 22px;
        }
        .article-content h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text-heading);
            margin-top: 40px;
            margin-bottom: 16px;
            line-height: 1.5;
        }
        .article-content h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--text-heading);
            margin-top: 32px;
            margin-bottom: 12px;
            line-height: 1.5;
        }
        .article-content h4 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-heading);
            margin-top: 24px;
            margin-bottom: 10px;
        }
        .article-content img {
            max-width: 100%;
            border-radius: 8px;
            margin: 24px 0;
            border: 1px solid var(--border);
        }
        .article-content blockquote {
            border-left: 4px solid var(--primary);
            background: var(--primary-light);
            padding: 18px 24px;
            border-radius: 0 10px 10px 0;
            margin: 28px 0;
            color: var(--text-body);
            font-style: normal;
        }
        .article-content blockquote p:last-child {
            margin-bottom: 0;
        }
        .article-content ul,
        .article-content ol {
            padding-left: 24px;
            margin-bottom: 22px;
        }
        .article-content li {
            margin-bottom: 8px;
        }
        .article-content a {
            color: var(--primary);
            font-weight: 500;
            border-bottom: 1px solid transparent;
        }
        .article-content a:hover {
            border-bottom-color: var(--primary);
        }
        .article-content code {
            background: var(--primary-light);
            color: var(--primary-dark);
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 14px;
        }

        /* Article Footer */
        .article-footer {
            margin-top: 48px;
            padding-top: 24px;
            border-top: 1px solid var(--border);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
        }
        .article-footer .btn {
            padding: 10px 24px;
            font-size: 15px;
            border-radius: 8px;
        }

        /* Not Found */
        .article-not-found {
            text-align: center;
            padding: 80px 40px;
            background: var(--card-bg);
            border-radius: 16px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
        }
        .not-found-icon {
            font-size: 56px;
            color: var(--primary);
            margin-bottom: 20px;
        }
        .article-not-found h1 {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 12px;
        }
        .article-not-found p {
            color: var(--text-muted);
            margin-bottom: 24px;
        }
        .article-not-found .btn {
            padding: 12px 32px;
            font-size: 15px;
        }

        /* ===== Related Section ===== */
        .related-section {
            padding: 80px 0;
            background: var(--bg);
        }
        .section-head {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 40px;
        }
        .section-head h2 {
            font-size: 30px;
            font-weight: 700;
            color: var(--text-heading);
            margin: 0;
        }
        .section-more {
            color: var(--primary);
            font-size: 15px;
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 6px;
            transition: var(--transition);
        }
        .section-more:hover {
            color: var(--primary-dark);
            gap: 10px;
        }
        .related-card {
            background: var(--card-bg);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            overflow: hidden;
            height: 100%;
            transition: var(--transition);
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .related-cover {
            display: block;
            overflow: hidden;
            aspect-ratio: 16/10;
        }
        .related-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .4s ease;
        }
        .related-card:hover .related-cover img {
            transform: scale(1.05);
        }
        .related-info {
            padding: 20px 20px 16px;
        }
        .badge-tag {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: 6px;
            margin-bottom: 12px;
        }
        .related-info h3 {
            font-size: 17px;
            font-weight: 600;
            line-height: 1.5;
            margin-bottom: 10px;
        }
        .related-info h3 a {
            color: var(--text-heading);
        }
        .related-info h3 a:hover {
            color: var(--primary);
        }
        .related-date {
            color: var(--text-muted);
            font-size: 13px;
            margin: 0;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            padding: 96px 0;
            background: linear-gradient(135deg, rgba(10, 93, 80, .92), rgba(14, 124, 107, .82)), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            color: #fff;
            text-align: center;
        }
        .cta-section h2 {
            font-size: 36px;
            font-weight: 700;
            margin-bottom: 16px;
            color: #fff;
        }
        .cta-section p {
            font-size: 16px;
            opacity: .9;
            margin-bottom: 32px;
            max-width: 640px;
            margin-left: auto;
            margin-right: auto;
        }
        .cta-buttons {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .btn-cta {
            height: 52px;
            padding: 0 36px;
            font-size: 16px;
            font-weight: 600;
            border-radius: 10px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .btn-light-cta {
            background: #fff;
            color: var(--primary-dark);
            border: none;
        }
        .btn-light-cta:hover {
            background: var(--primary-light);
            color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, .2);
        }
        .btn-outline-light-cta {
            border: 2px solid rgba(255, 255, 255, .8);
            color: #fff;
            background: transparent;
        }
        .btn-outline-light-cta:hover {
            background: rgba(255, 255, 255, .12);
            border-color: #fff;
            color: #fff;
            transform: translateY(-2px);
        }

        /* ===== FAQ Section ===== */
        .faq-section {
            padding: 80px 0;
            background: var(--card-bg);
        }
        .faq-section .section-head h2 {
            margin-bottom: 8px;
        }
        .faq-wrap {
            max-width: 760px;
            margin: 0 auto;
        }
        .accordion-item {
            border: 1px solid var(--border);
            border-radius: var(--radius) !important;
            margin-bottom: 16px;
            overflow: hidden;
        }
        .accordion-button {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-heading);
            background: #fff;
            padding: 18px 24px;
            transition: var(--transition);
        }
        .accordion-button:not(.collapsed) {
            color: var(--primary);
            background: var(--primary-light);
            box-shadow: none;
        }
        .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(14, 124, 107, .12);
            border-color: transparent;
        }
        .accordion-button::after {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23172420'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");
        }
        .accordion-button:not(.collapsed)::after {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%230E7C6B'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");
        }
        .accordion-body {
            padding: 20px 24px;
            font-size: 14px;
            line-height: 1.7;
            color: var(--text-body);
            background: #fff;
            border-top: 1px solid var(--border);
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--footer-bg);
            color: rgba(255, 255, 255, .8);
            padding: 64px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
            gap: 48px;
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(255, 255, 255, .08);
        }
        .footer-brand-text {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-brand-text .brand-icon {
            background: var(--primary);
            width: 36px;
            height: 36px;
            font-size: 16px;
            flex-basis: 36px;
        }
        .footer-desc {
            font-size: 14px;
            line-height: 1.8;
            opacity: .75;
            margin-bottom: 24px;
            max-width: 300px;
        }
        .social-icons {
            display: flex;
            gap: 12px;
        }
        .social-icons a {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255, 255, 255, .08);
            color: rgba(255, 255, 255, .8);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            transition: var(--transition);
        }
        .social-icons a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .footer-title {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 20px;
        }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-links li {
            margin-bottom: 12px;
        }
        .footer-links a {
            color: rgba(255, 255, 255, .7);
            font-size: 14px;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .footer-contact p {
            font-size: 14px;
            color: rgba(255, 255, 255, .7);
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .footer-contact i {
            color: var(--primary);
            width: 16px;
            text-align: center;
        }
        .copyright {
            padding: 20px 0;
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, .5);
        }
        .copyright p {
            margin: 0;
        }

        /* ===== Responsive ===== */
        @media (max-width: 991.98px) {
            .main-nav {
                padding: 8px 0;
            }
            .main-nav .navbar-collapse {
                padding: 16px 0;
                border-top: 1px solid var(--border);
                margin-top: 8px;
            }
            .main-nav .navbar-nav .nav-link {
                padding: 12px 16px;
                border-radius: 8px;
            }
            .main-nav .navbar-nav .nav-link.active::after {
                display: none;
            }
            .search-wrap {
                width: 100%;
                margin-bottom: 8px;
            }
            .btn-download-nav {
                width: 100%;
                justify-content: center;
            }
            .nav-right {
                flex-direction: column;
                align-items: stretch !important;
                width: 100%;
            }

            .article-card {
                padding: 32px 24px;
            }
            .article-card h1 {
                font-size: 26px;
            }

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

            .cta-section h2 {
                font-size: 30px;
            }
        }

        @media (max-width: 767.98px) {
            .breadcrumb-bar {
                padding: 16px 0 4px;
            }
            .article-main {
                padding: 20px 0 48px;
            }
            .article-card {
                padding: 24px 18px;
                border-radius: 12px;
            }
            .article-card h1 {
                font-size: 22px;
            }
            .article-meta {
                gap: 12px;
                font-size: 13px;
            }
            .article-content {
                font-size: 15px;
            }
            .related-section {
                padding: 56px 0;
            }
            .section-head h2 {
                font-size: 24px;
            }
            .cta-section {
                padding: 64px 0;
            }
            .cta-section h2 {
                font-size: 24px;
            }
            .btn-cta {
                width: 100%;
                justify-content: center;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 575.98px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .article-meta {
                flex-direction: column;
                gap: 8px;
            }
            .article-footer {
                flex-direction: column;
            }
            .article-footer .btn {
                width: 100%;
                text-align: center;
            }
            .cta-buttons {
                flex-direction: column;
            }
        }

/* roulang page: category1 */
:root {
            --brand-green: #0E7C6B;
            --brand-green-dark: #0A5D50;
            --brand-green-light: #E2F2EE;
            --accent-coral: #FF7A45;
            --accent-coral-dark: #E8622F;
            --bg-body: #F6F9F8;
            --bg-card: #FFFFFF;
            --text-title: #172420;
            --text-body: #4E5B56;
            --text-muted: #81908B;
            --border-color: #E2EAE7;
            --footer-bg: #0B2E28;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-xs: 6px;
            --shadow-sm: 0 4px 16px rgba(16, 40, 32, .06);
            --shadow-md: 0 8px 24px rgba(16, 40, 32, .10);
            --transition: all .25s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            background: var(--bg-body);
            color: var(--text-body);
            line-height: 1.8;
            font-size: 16px;
            margin: 0;
            padding: 0;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }

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

        .container {
            max-width: 1180px;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* ===== 导航 ===== */
        .main-nav {
            background: #fff;
            min-height: 64px;
            border-bottom: 1px solid var(--border-color);
            box-shadow: 0 1px 6px rgba(16, 40, 32, .04);
            padding-top: 0;
            padding-bottom: 0;
            position: sticky;
            top: 0;
            z-index: 1050;
        }

        .main-nav .navbar-brand {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 20px;
            font-weight: 700;
            color: var(--text-title);
            padding: 8px 0;
        }

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

        .brand-icon {
            width: 38px;
            height: 38px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--brand-green), var(--brand-green-dark));
            color: #fff;
            border-radius: 50%;
            font-size: 17px;
        }

        .brand-text {
            font-size: 19px;
            letter-spacing: .5px;
            color: var(--text-title);
            font-weight: 700;
        }

        .navbar-nav .nav-item {
            margin: 0 4px;
        }

        .navbar-nav .nav-link {
            font-size: 15px;
            color: var(--text-body);
            font-weight: 500;
            padding: 10px 16px !important;
            border-radius: 20px;
            position: relative;
            transition: var(--transition);
        }

        .navbar-nav .nav-link:hover {
            color: var(--brand-green);
            background: var(--brand-green-light);
        }

        .navbar-nav .nav-link.active {
            color: var(--brand-green);
            font-weight: 600;
            background: var(--brand-green-light);
        }

        .search-wrap {
            position: relative;
            width: 200px;
        }

        .search-input {
            height: 40px;
            border-radius: 20px;
            border: 1px solid transparent;
            background: #F2F6F5;
            padding-left: 38px;
            font-size: 14px;
            color: var(--text-title);
            transition: var(--transition);
        }

        .search-input:focus {
            background: #fff;
            border-color: var(--brand-green);
            box-shadow: 0 0 0 4px rgba(14, 124, 107, .12);
            outline: none;
        }

        .search-icon {
            position: absolute;
            left: 13px;
            top: 13px;
            font-size: 14px;
            color: var(--text-muted);
            pointer-events: none;
        }

        .btn-download-nav {
            height: 40px;
            padding: 0 18px;
            border-radius: var(--radius-sm);
            background: var(--brand-green);
            border: 1px solid var(--brand-green);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: var(--transition);
        }

        .btn-download-nav:hover {
            background: var(--brand-green-dark);
            border-color: var(--brand-green-dark);
            color: #fff;
            transform: translateY(-1px);
        }

        .btn-download-nav:focus {
            box-shadow: 0 0 0 4px rgba(14, 124, 107, .18);
        }

        .navbar-toggler {
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 6px 10px;
        }

        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(14, 124, 107, .15);
            border-color: var(--brand-green);
        }

        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(23,36,32,0.8)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        /* ===== 分类页横幅 ===== */
        .category-hero {
            background: linear-gradient(135deg, rgba(10, 93, 80, .93), rgba(14, 124, 107, .86) 50%, rgba(14, 124, 107, .66)), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            color: #fff;
            padding: 70px 0 64px;
        }

        .category-hero .hero-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 40px;
        }

        .category-badge {
            display: inline-flex;
            align-items: center;
            background: rgba(255, 255, 255, .16);
            border-radius: var(--radius-xs);
            padding: 4px 14px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 1px;
            border: 1px solid rgba(255, 255, 255, .22);
            margin-bottom: 14px;
            color: #fff;
        }

        .category-hero h1 {
            font-size: 40px;
            font-weight: 700;
            color: #fff;
            margin: 0 0 12px;
            line-height: 1.3;
            letter-spacing: .5px;
        }

        .category-hero p {
            font-size: 16px;
            line-height: 1.8;
            color: rgba(255, 255, 255, .88);
            margin-bottom: 0;
            max-width: 600px;
        }

        .category-hero-icon {
            width: 140px;
            height: 140px;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(255, 255, 255, .12);
            border-radius: 32px;
            border: 1px solid rgba(255, 255, 255, .16);
            font-size: 52px;
            color: rgba(255, 255, 255, .9);
        }

        /* ===== 内容卡片区 ===== */
        .content-section {
            padding: 72px 0 48px;
        }

        .section-head {
            margin-bottom: 40px;
        }

        .section-head .section-tag {
            color: var(--brand-green);
            font-size: 14px;
            font-weight: 600;
            letter-spacing: 1px;
        }

        .section-head h2 {
            font-size: 32px;
            font-weight: 700;
            color: var(--text-title);
            margin: 4px 0 8px;
        }

        .section-head p {
            color: var(--text-muted);
            font-size: 15px;
            max-width: 680px;
        }

        .article-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            height: 100%;
            display: flex;
            flex-direction: column;
            transition: var(--transition);
        }

        .article-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }

        .article-card .card-thumb {
            height: 210px;
            overflow: hidden;
            background: var(--brand-green-light);
        }

        .article-card .card-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
            transition: transform .45s ease;
        }

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

        .article-card .card-body-custom {
            padding: 20px 20px 16px;
            display: flex;
            flex-direction: column;
            flex-grow: 1;
        }

        .card-meta {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 10px;
        }

        .card-tag {
            background: var(--brand-green-light);
            color: var(--brand-green);
            font-size: 12px;
            font-weight: 600;
            padding: 2px 10px;
            border-radius: var(--radius-xs);
        }

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

        .article-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-title);
            line-height: 1.5;
            margin-bottom: 8px;
        }

        .article-card p {
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.7;
            margin-bottom: 12px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .article-card .card-link {
            margin-top: auto;
            font-size: 14px;
            color: var(--brand-green);
            font-weight: 600;
        }

        .article-card .card-link i {
            font-size: 12px;
            margin-left: 4px;
            transition: var(--transition);
        }

        .article-card .card-link:hover {
            color: var(--brand-green-dark);
        }

        .article-card .card-link:hover i {
            transform: translateX(4px);
        }

        /* ===== 核心信息条 ===== */
        .info-strip {
            padding: 48px 0 64px;
        }

        .info-strip-inner {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: 20px;
            padding: 40px 40px 8px;
            box-shadow: var(--shadow-sm);
        }

        .info-item {
            display: flex;
            gap: 22px;
            padding: 20px 0 20px;
            border-bottom: 1px dashed var(--border-color);
            align-items: flex-start;
        }

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

        .info-num {
            width: 52px;
            height: 52px;
            border-radius: 12px;
            background: var(--brand-green-light);
            color: var(--brand-green);
            font-size: 20px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            font-family: 'Inter', sans-serif;
        }

        .info-content h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-title);
            margin: 0 0 4px;
        }

        .info-content p {
            font-size: 15px;
            color: var(--text-body);
            line-height: 1.7;
            margin: 0;
        }

        /* ===== 下载 CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--brand-green-dark), var(--brand-green));
            color: #fff;
            padding: 76px 0;
            text-align: center;
        }

        .cta-section h2 {
            font-size: 34px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: .5px;
        }

        .cta-section .cta-desc {
            color: rgba(255, 255, 255, .85);
            font-size: 16px;
            margin-bottom: 34px;
            max-width: 640px;
            margin-left: auto;
            margin-right: auto;
        }

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

        .btn-cta-primary {
            height: 52px;
            padding: 0 34px;
            background: #fff;
            color: var(--brand-green);
            border: 1px solid #fff;
            border-radius: 10px;
            font-size: 16px;
            font-weight: 700;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition);
        }

        .btn-cta-primary:hover {
            background: rgba(255, 255, 255, .92);
            color: var(--brand-green-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, .18);
        }

        .btn-cta-primary:focus {
            box-shadow: 0 0 0 4px rgba(255, 255, 255, .25);
        }

        .btn-cta-outline {
            height: 52px;
            padding: 0 34px;
            background: transparent;
            color: #fff;
            border: 1px solid rgba(255, 255, 255, .7);
            border-radius: 10px;
            font-size: 15px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition);
        }

        .btn-cta-outline:hover {
            background: rgba(255, 255, 255, .1);
            color: #fff;
            border-color: #fff;
            transform: translateY(-1px);
        }

        .btn-cta-qr {
            height: 52px;
            padding: 0 24px;
            background: rgba(255, 255, 255, .14);
            color: #fff;
            border: 1px solid rgba(255, 255, 255, .35);
            border-radius: 10px;
            font-size: 15px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition);
        }

        .btn-cta-qr:hover {
            background: rgba(255, 255, 255, .22);
            color: #fff;
            border-color: rgba(255, 255, 255, .7);
        }

        .qr-code-block {
            width: 64px;
            height: 64px;
            background: #fff;
            border-radius: 10px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: var(--text-muted);
            font-size: 22px;
            border: 1px solid var(--border-color);
            margin-right: 8px;
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 72px 0 78px;
        }

        .faq-wrap {
            max-width: 820px;
            margin: 0 auto;
        }

        .accordion-item {
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm) !important;
            background: #fff;
            margin-bottom: 14px;
            overflow: hidden;
            box-shadow: var(--shadow-sm);
        }

        .accordion-button {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-title);
            background: #fff;
            padding: 18px 22px;
            line-height: 1.5;
            transition: var(--transition);
        }

        .accordion-button:hover {
            color: var(--brand-green);
            background: #FAFDFC;
        }

        .accordion-button:focus {
            box-shadow: 0 0 0 4px rgba(14, 124, 107, .12);
            border-color: var(--brand-green);
        }

        .accordion-button:not(.collapsed) {
            background: var(--brand-green-light);
            color: var(--brand-green);
            box-shadow: none;
        }

        .accordion-button::after {
            background-size: 14px;
            transition: var(--transition);
            filter: hue-rotate(160deg) saturate(.6);
        }

        .accordion-button:not(.collapsed)::after {
            transform: rotate(180deg);
            filter: hue-rotate(160deg) saturate(.8);
        }

        .accordion-body {
            padding: 14px 22px 20px;
            font-size: 15px;
            line-height: 1.75;
            color: var(--text-body);
            background: #fff;
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--footer-bg);
            color: rgba(255, 255, 255, .72);
            padding-top: 64px;
            font-size: 15px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 44px;
            padding-bottom: 40px;
        }

        .footer-brand-text {
            font-size: 22px;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 14px;
        }

        .footer-desc {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, .62);
            margin-bottom: 18px;
            max-width: 300px;
        }

        .social-icons {
            display: flex;
            gap: 12px;
        }

        .social-icons a {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255, 255, 255, .08);
            color: rgba(255, 255, 255, .75);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            transition: var(--transition);
        }

        .social-icons a:hover {
            background: var(--brand-green);
            color: #fff;
            transform: translateY(-2px);
        }

        .footer-title {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: .5px;
        }

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

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

        .footer-links a {
            color: rgba(255, 255, 255, .65);
            font-size: 14px;
            transition: var(--transition);
            display: inline-block;
        }

        .footer-links a:hover {
            color: #fff;
            padding-left: 5px;
        }

        .footer-contact p {
            margin-bottom: 10px;
            font-size: 14px;
            color: rgba(255, 255, 255, .65);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .footer-contact i {
            width: 20px;
            text-align: center;
            color: var(--brand-green);
        }

        .copyright {
            border-top: 1px solid rgba(255, 255, 255, .1);
            padding: 20px 0;
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, .45);
        }

        .copyright p {
            margin: 0;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 991.98px) {
            .search-wrap {
                width: 100%;
                max-width: 300px;
            }
            .nav-right {
                width: 100%;
                margin-top: 12px !important;
            }
            .main-nav .navbar-collapse {
                padding-bottom: 16px;
            }
            .category-hero {
                padding: 54px 0 48px;
            }
            .category-hero h1 {
                font-size: 32px;
            }
            .category-hero-icon {
                width: 96px;
                height: 96px;
                font-size: 36px;
                border-radius: 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 767.98px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .category-hero .hero-inner {
                flex-direction: column;
                text-align: center;
                gap: 24px;
            }
            .category-hero p {
                margin-left: auto;
                margin-right: auto;
            }
            .category-hero-icon {
                display: none;
            }
            .section-head h2 {
                font-size: 26px;
            }
            .info-strip-inner {
                padding: 24px 20px 0;
            }
            .cta-section {
                padding: 56px 0;
            }
            .cta-section h2 {
                font-size: 27px;
            }
            .cta-buttons .btn {
                width: 100%;
                justify-content: center;
            }
            .article-card .card-thumb {
                height: 180px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
        }

        @media (max-width: 575.98px) {
            .category-hero h1 {
                font-size: 28px;
            }
            .category-hero p {
                font-size: 15px;
            }
            .info-item {
                flex-direction: column;
                gap: 10px;
            }
            .content-section {
                padding-top: 48px;
            }
            .section-head h2 {
                font-size: 24px;
            }
            .btn-download-nav {
                width: 100%;
                justify-content: center;
            }
        }