/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary: #0DBE5E;
            --primary-dark: #0AA34F;
            --primary-light: #1FDF74;
            --accent: #FF6D00;
            --accent-dark: #E65C00;
            --dark: #0A0E17;
            --dark-light: #1A2235;
            --light: #F7F9FC;
            --white: #FFFFFF;
            --border: #E8EDF2;
            --text: #1A2A3A;
            --text-light: #6B7A8A;
            --text-muted: #9AABBC;
            --shadow-sm: 0 2px 8px rgba(10,14,23,0.06);
            --shadow-md: 0 4px 20px rgba(10,14,23,0.08);
            --shadow-lg: 0 8px 40px rgba(10,14,23,0.12);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --font: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            --nav-width: 64px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; font-size: 16px; }
        body {
            font-family: var(--font);
            color: var(--text);
            background: var(--light);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            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; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.4; letter-spacing: -0.5px; margin-bottom: 0.5rem; }
        h1 { font-size: 2.8rem; }
        h2 { font-size: 2rem; }
        h3 { font-size: 1.5rem; }
        p { margin-bottom: 1rem; font-size: 1rem; line-height: 1.8; letter-spacing: 0.5px; }
        .container { max-width: 1280px; padding: 0 24px; margin: 0 auto; }
        .container-narrow { max-width: 760px; margin: 0 auto; padding: 0 24px; }
        section { padding: 80px 0; }
        .section-title { text-align: center; margin-bottom: 48px; }
        .section-title h2 { font-size: 2rem; font-weight: 700; color: var(--dark); margin-bottom: 12px; }
        .section-title p { font-size: 1.05rem; color: var(--text-light); max-width: 600px; margin: 0 auto; }
        .text-primary { color: var(--primary) !important; }
        .text-accent { color: var(--accent) !important; }
        .bg-dark { background: var(--dark) !important; }
        .bg-light { background: var(--light) !important; }
        .bg-white { background: var(--white) !important; }

        /* ===== App Shell Layout ===== */
        .app-shell { display: flex; min-height: 100vh; }
        .side-nav {
            position: fixed; top: 0; left: 0; width: var(--nav-width); height: 100vh;
            background: var(--dark); z-index: 1030; display: flex; flex-direction: column;
            align-items: center; padding: 16px 0; transition: var(--transition);
            border-right: 1px solid rgba(255,255,255,0.06);
        }
        .side-nav .nav-logo {
            width: 40px; height: 40px; background: var(--primary); border-radius: var(--radius-sm);
            display: flex; align-items: center; justify-content: center; font-size: 10px;
            font-weight: 700; color: var(--white); text-align: center; line-height: 1.2;
            margin-bottom: 32px; letter-spacing: 0; padding: 2px;
            flex-shrink: 0;
        }
        .side-nav .nav-items { display: flex; flex-direction: column; align-items: center; gap: 8px; flex: 1; width: 100%; padding: 0 8px; }
        .side-nav .nav-item {
            width: 48px; height: 48px; border-radius: var(--radius-sm);
            display: flex; align-items: center; justify-content: center;
            color: #7B8794; font-size: 20px; transition: var(--transition);
            position: relative; cursor: pointer;
        }
        .side-nav .nav-item:hover { color: var(--white); background: rgba(255,255,255,0.08); }
        .side-nav .nav-item.active { color: var(--primary); background: rgba(13,190,94,0.12); }
        .side-nav .nav-item.active::before {
            content: ''; position: absolute; left: -8px; top: 50%; transform: translateY(-50%);
            width: 3px; height: 24px; background: var(--primary); border-radius: 0 4px 4px 0;
        }
        .side-nav .nav-item .nav-label {
            display: none; position: absolute; left: 60px; top: 50%; transform: translateY(-50%);
            background: var(--dark); color: var(--white); padding: 6px 14px; border-radius: var(--radius-sm);
            font-size: 13px; font-weight: 500; white-space: nowrap; box-shadow: var(--shadow-md);
            z-index: 10; pointer-events: none;
        }
        .side-nav .nav-item:hover .nav-label { display: block; }
        .main-content { flex: 1; margin-left: var(--nav-width); min-height: 100vh; }

        /* ===== Top Nav (Mobile) ===== */
        .top-nav {
            display: none; position: fixed; top: 0; left: 0; right: 0; height: 56px;
            background: var(--dark); z-index: 1020; padding: 0 16px;
            align-items: center; justify-content: space-between;
            border-bottom: 1px solid rgba(255,255,255,0.06);
        }
        .top-nav .hamburger { color: var(--white); font-size: 24px; cursor: pointer; padding: 8px; background: none; border: none; }
        .top-nav .mobile-logo { color: var(--white); font-size: 15px; font-weight: 700; letter-spacing: 0; }
        .offcanvas.offcanvas-start { width: 260px; background: var(--dark); color: var(--white); }
        .offcanvas .offcanvas-header { border-bottom: 1px solid rgba(255,255,255,0.06); }
        .offcanvas .offcanvas-title { font-size: 16px; font-weight: 700; color: var(--white); }
        .offcanvas .nav-item-mobile {
            display: flex; align-items: center; gap: 12px; padding: 12px 20px;
            color: #7B8794; font-size: 15px; transition: var(--transition); border-radius: 0;
        }
        .offcanvas .nav-item-mobile:hover { color: var(--white); background: rgba(255,255,255,0.06); }
        .offcanvas .nav-item-mobile.active { color: var(--primary); background: rgba(13,190,94,0.12); }
        .offcanvas .nav-item-mobile i { width: 20px; font-size: 18px; }

        /* ===== Hero ===== */
        .hero {
            position: relative; min-height: 85vh; display: flex; align-items: center;
            background: var(--dark); overflow: hidden; padding: 80px 0;
        }
        .hero-bg {
            position: absolute; inset: 0; background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: 0.25; z-index: 0;
        }
        .hero-bg::after {
            content: ''; position: absolute; inset: 0;
            background: linear-gradient(135deg, rgba(10,14,23,0.85) 0%, rgba(10,14,23,0.70) 100%);
        }
        .hero .container { position: relative; z-index: 1; }
        .hero-content { max-width: 700px; }
        .hero h1 { font-size: 3rem; font-weight: 700; color: var(--white); margin-bottom: 20px; letter-spacing: -1px; line-height: 1.2; }
        .hero h1 span { color: var(--primary); }
        .hero-subtitle { font-size: 1.2rem; color: rgba(255,255,255,0.75); line-height: 1.6; margin-bottom: 36px; font-weight: 300; letter-spacing: 0.3px; }
        .hero-buttons { display: flex; gap: 16px; flex-wrap: wrap; }
        .btn-primary-custom {
            display: inline-flex; align-items: center; gap: 8px; padding: 14px 36px;
            background: var(--primary); color: var(--white); border: none; border-radius: var(--radius-md);
            font-size: 1rem; font-weight: 700; cursor: pointer; transition: var(--transition);
            letter-spacing: 0.3px;
        }
        .btn-primary-custom:hover { background: var(--primary-dark); color: var(--white); transform: translateY(-2px); box-shadow: var(--shadow-md); }
        .btn-secondary-custom {
            display: inline-flex; align-items: center; gap: 8px; padding: 14px 36px;
            background: transparent; color: var(--white); border: 2px solid rgba(255,255,255,0.3); border-radius: var(--radius-md);
            font-size: 1rem; font-weight: 600; cursor: pointer; transition: var(--transition);
            letter-spacing: 0.3px;
        }
        .btn-secondary-custom:hover { border-color: var(--primary); color: var(--primary); transform: translateY(-2px); }

        /* ===== Features Carousel ===== */
        .features-carousel { background: var(--white); }
        .feature-card {
            background: var(--white); border-radius: var(--radius-lg); overflow: hidden;
            box-shadow: var(--shadow-sm); border: 1px solid var(--border); transition: var(--transition);
            height: 100%;
        }
        .feature-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
        .feature-card .card-img {
            aspect-ratio: 4/3; background: var(--dark-light); overflow: hidden;
            background-size: cover; background-position: center;
        }
        .feature-card .card-body { padding: 20px 24px 24px; }
        .feature-card .card-body h5 { font-size: 1.05rem; font-weight: 700; margin-bottom: 8px; color: var(--dark); }
        .feature-card .card-body p { font-size: 0.875rem; color: var(--text-light); line-height: 1.6; margin: 0; }
        .carousel-indicators-custom {
            display: flex; justify-content: center; gap: 10px; margin-top: 36px;
        }
        .carousel-indicators-custom .dot {
            width: 10px; height: 10px; border-radius: 50%; background: var(--border);
            border: none; cursor: pointer; transition: var(--transition); padding: 0;
        }
        .carousel-indicators-custom .dot.active { background: var(--primary); width: 28px; border-radius: 5px; }
        .carousel-control-prev-custom, .carousel-control-next-custom {
            position: absolute; top: 50%; transform: translateY(-50%); z-index: 5;
            width: 44px; height: 44px; border-radius: 50%; background: var(--white);
            border: 1px solid var(--border); box-shadow: var(--shadow-sm); display: flex;
            align-items: center; justify-content: center; cursor: pointer; transition: var(--transition);
            color: var(--text); font-size: 18px;
        }
        .carousel-control-prev-custom:hover, .carousel-control-next-custom:hover { background: var(--light); box-shadow: var(--shadow-md); }
        .carousel-control-prev-custom { left: -22px; }
        .carousel-control-next-custom { right: -22px; }

        /* ===== System Requirements ===== */
        .system-reqs { background: var(--dark); }
        .system-reqs .section-title h2 { color: var(--white); }
        .system-reqs .section-title p { color: rgba(255,255,255,0.6); }
        .req-card {
            background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.08);
            border-radius: var(--radius-md); padding: 24px; display: flex; align-items: flex-start; gap: 16px;
            transition: var(--transition); height: 100%;
        }
        .req-card:hover { background: rgba(255,255,255,0.10); transform: translateY(-2px); }
        .req-icon { width: 44px; height: 44px; border-radius: var(--radius-sm); background: rgba(13,190,94,0.15); display: flex; align-items: center; justify-content: center; font-size: 22px; color: var(--primary); flex-shrink: 0; }
        .req-info h5 { font-size: 1rem; font-weight: 700; color: var(--white); margin-bottom: 4px; }
        .req-info p { font-size: 0.85rem; color: rgba(255,255,255,0.55); margin: 0; line-height: 1.5; }
        .badge-custom { display: inline-block; padding: 2px 10px; border-radius: 20px; font-size: 0.7rem; font-weight: 600; letter-spacing: 0.3px; }
        .badge-primary { background: var(--primary); color: var(--white); }
        .badge-accent { background: var(--accent); color: var(--white); }

        /* ===== Reviews ===== */
        .reviews { background: var(--white); }
        .review-card {
            background: var(--white); border: 1px solid var(--border); border-radius: var(--radius-md);
            padding: 24px; transition: var(--transition); position: relative;
            box-shadow: var(--shadow-sm);
        }
        .review-card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
        .review-card .user { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
        .review-card .avatar { width: 44px; height: 44px; border-radius: 50%; background: var(--dark-light); background-size: cover; background-position: center; flex-shrink: 0; }
        .review-card .user-info .name { font-size: 0.95rem; font-weight: 700; color: var(--dark); }
        .review-card .stars { color: var(--accent); font-size: 14px; letter-spacing: 1px; }
        .review-card .text { font-size: 0.875rem; color: var(--text-light); line-height: 1.7; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; margin: 0; }
        .review-card .text::before { content: '"'; }
        .review-card .text::after { content: '"'; }
        .reviews-masonry { display: flex; flex-wrap: wrap; gap: 24px; justify-content: center; }
        .reviews-masonry .review-card { width: calc(33.333% - 16px); min-width: 260px; }
        .reviews-masonry .review-card:nth-child(2) { margin-top: 20px; }
        .reviews-masonry .review-card:nth-child(4) { margin-top: 10px; }
        .review-more { text-align: center; margin-top: 36px; }
        .review-more a { color: var(--text-light); font-size: 0.9rem; font-weight: 500; border-bottom: 1px solid var(--border); padding-bottom: 2px; }
        .review-more a:hover { color: var(--primary); border-color: var(--primary); }

        /* ===== Download Buttons ===== */
        .download-section { background: var(--dark); }
        .download-section .section-title h2 { color: var(--white); }
        .download-section .section-title p { color: rgba(255,255,255,0.6); }
        .download-group { display: flex; justify-content: center; gap: 20px; flex-wrap: wrap; }
        .btn-download {
            display: inline-flex; align-items: center; gap: 12px; padding: 16px 40px;
            background: var(--accent); color: var(--white); border: none; border-radius: var(--radius-md);
            font-size: 1rem; font-weight: 700; cursor: pointer; transition: var(--transition);
            min-height: 56px; letter-spacing: 0.3px;
        }
        .btn-download:hover { background: var(--accent-dark); color: var(--white); transform: translateY(-3px); box-shadow: 0 8px 30px rgba(255,109,0,0.3); }
        .btn-download i { font-size: 24px; }
        .btn-download-outline {
            display: inline-flex; align-items: center; gap: 12px; padding: 16px 40px;
            background: transparent; color: var(--white); border: 2px solid rgba(255,255,255,0.25);
            border-radius: var(--radius-md); font-size: 1rem; font-weight: 600; cursor: pointer;
            transition: var(--transition); min-height: 56px; letter-spacing: 0.3px;
        }
        .btn-download-outline:hover { border-color: var(--primary); color: var(--primary); transform: translateY(-3px); }
        .btn-download-outline i { font-size: 24px; }

        /* ===== Latest News (CMS) ===== */
        .latest-news { background: var(--white); }
        .news-card {
            background: var(--white); border: 1px solid var(--border); border-radius: var(--radius-md);
            padding: 24px; transition: var(--transition); box-shadow: var(--shadow-sm); height: 100%;
            display: flex; flex-direction: column;
        }
        .news-card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
        .news-card .category-badge {
            display: inline-block; padding: 3px 12px; border-radius: 20px;
            background: var(--primary); color: var(--white); font-size: 0.7rem; font-weight: 600;
            letter-spacing: 0.5px; margin-bottom: 12px; align-self: flex-start;
        }
        .news-card h5 { font-size: 1.1rem; font-weight: 700; color: var(--dark); margin-bottom: 8px; line-height: 1.4; }
        .news-card p { font-size: 0.85rem; color: var(--text-light); line-height: 1.5; margin-bottom: 16px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; flex: 1; }
        .news-card .meta { display: flex; align-items: center; justify-content: space-between; font-size: 0.8rem; color: var(--text-muted); }
        .news-card .meta a { font-size: 0.8rem; font-weight: 600; color: var(--primary); }
        .news-card .meta a:hover { color: var(--primary-dark); }
        .news-empty {
            text-align: center; padding: 60px 20px; color: var(--text-muted);
        }
        .news-empty i { font-size: 64px; color: var(--border); margin-bottom: 16px; display: block; }
        .news-empty p { font-size: 1rem; color: var(--text-light); }

        /* ===== FAQ ===== */
        .faq-section { background: var(--light); }
        .faq-item { background: var(--white); border-radius: var(--radius-sm); margin-bottom: 12px; border: 1px solid var(--border); overflow: hidden; transition: var(--transition); }
        .faq-item:hover { border-color: rgba(13,190,94,0.2); }
        .faq-question {
            display: flex; align-items: center; justify-content: space-between; padding: 16px 20px;
            cursor: pointer; font-size: 0.95rem; font-weight: 600; color: var(--dark);
            transition: var(--transition); background: var(--white); border: none; width: 100%; text-align: left;
        }
        .faq-question:hover { background: var(--light); }
        .faq-question i { color: var(--text-muted); transition: var(--transition); font-size: 14px; }
        .faq-question[aria-expanded="true"] i { transform: rotate(180deg); color: var(--primary); }
        .faq-answer { padding: 0 20px 16px; font-size: 0.875rem; color: var(--text-light); line-height: 1.7; }

        /* ===== CTA ===== */
        .cta-section { background: var(--dark); position: relative; overflow: hidden; }
        .cta-section::before {
            content: ''; position: absolute; inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.10; z-index: 0;
        }
        .cta-section .container { position: relative; z-index: 1; }
        .cta-section h2 { color: var(--white); font-size: 2rem; font-weight: 700; margin-bottom: 16px; }
        .cta-section p { color: rgba(255,255,255,0.65); font-size: 1.05rem; max-width: 600px; margin: 0 auto 32px; }
        .cta-section .btn-primary-custom { padding: 16px 48px; font-size: 1.05rem; }

        /* ===== Footer ===== */
        .footer { background: var(--dark); border-top: 1px solid rgba(255,255,255,0.06); padding: 60px 0 24px; }
        .footer-brand { margin-bottom: 20px; }
        .footer-brand .logo-text { font-size: 1.2rem; font-weight: 700; color: var(--white); letter-spacing: 0; }
        .footer-brand .logo-text span { color: var(--primary); }
        .footer-brand p { font-size: 0.85rem; color: rgba(255,255,255,0.45); max-width: 300px; margin-top: 12px; line-height: 1.6; }
        .footer h5 { font-size: 0.95rem; font-weight: 700; color: var(--white); margin-bottom: 16px; letter-spacing: 0; }
        .footer a { font-size: 0.85rem; color: rgba(255,255,255,0.5); display: block; margin-bottom: 8px; transition: var(--transition); }
        .footer a:hover { color: var(--primary); }
        .footer .contact-item { display: flex; align-items: center; gap: 10px; font-size: 0.85rem; color: rgba(255,255,255,0.5); margin-bottom: 10px; }
        .footer .contact-item i { width: 16px; color: var(--primary); }
        .footer-bottom { border-top: 1px solid rgba(255,255,255,0.06); margin-top: 40px; padding-top: 20px; text-align: center; font-size: 0.8rem; color: rgba(255,255,255,0.35); }
        .footer .social-icons { display: flex; gap: 12px; margin-top: 12px; }
        .footer .social-icons a { width: 36px; height: 36px; border-radius: 50%; background: rgba(255,255,255,0.06); display: flex; align-items: center; justify-content: center; color: rgba(255,255,255,0.5); font-size: 16px; margin: 0; }
        .footer .social-icons a:hover { background: var(--primary); color: var(--white); }

        /* ===== Responsive ===== */
        @media (max-width: 1199px) {
            .hero h1 { font-size: 2.6rem; }
            .reviews-masonry .review-card { width: calc(50% - 12px); }
        }
        @media (max-width: 991px) {
            .side-nav { display: none; }
            .top-nav { display: flex; }
            .main-content { margin-left: 0; padding-top: 56px; }
            section { padding: 60px 0; }
            .hero { min-height: 70vh; padding: 60px 0; }
            .hero h1 { font-size: 2.2rem; }
            .hero-subtitle { font-size: 1.05rem; }
            .reviews-masonry .review-card { width: calc(50% - 12px); }
        }
        @media (max-width: 767px) {
            html { font-size: 15px; }
            section { padding: 48px 0; }
            .hero { min-height: 60vh; padding: 48px 0; }
            .hero h1 { font-size: 1.8rem; }
            .hero-subtitle { font-size: 0.95rem; margin-bottom: 28px; }
            .hero-buttons { flex-direction: column; width: 100%; }
            .hero-buttons .btn-primary-custom, .hero-buttons .btn-secondary-custom { width: 100%; justify-content: center; }
            .section-title h2 { font-size: 1.6rem; }
            .reviews-masonry .review-card { width: 100%; }
            .reviews-masonry .review-card:nth-child(2) { margin-top: 0; }
            .reviews-masonry .review-card:nth-child(4) { margin-top: 0; }
            .download-group { flex-direction: column; align-items: center; }
            .btn-download, .btn-download-outline { width: 100%; justify-content: center; }
            .feature-card .card-body { padding: 16px 20px 20px; }
            .cta-section h2 { font-size: 1.5rem; }
            .footer .col-md-4 { margin-bottom: 32px; }
            .footer .row > div:last-child { margin-bottom: 0; }
            .container { padding: 0 16px; }
            .carousel-control-prev-custom, .carousel-control-next-custom { display: none; }
        }
        @media (max-width: 520px) {
            .hero h1 { font-size: 1.5rem; }
            .hero-subtitle { font-size: 0.85rem; }
            .section-title h2 { font-size: 1.4rem; }
            .req-card { flex-direction: column; align-items: center; text-align: center; }
            .news-card { padding: 16px; }
            .faq-question { font-size: 0.85rem; padding: 14px 16px; }
            .faq-answer { font-size: 0.8rem; padding: 0 16px 14px; }
        }

        /* ===== Utility ===== */
        .mt-1 { margin-top: 8px; }
        .mt-2 { margin-top: 16px; }
        .mt-3 { margin-top: 24px; }
        .mt-4 { margin-top: 32px; }
        .mb-1 { margin-bottom: 8px; }
        .mb-2 { margin-bottom: 16px; }
        .mb-3 { margin-bottom: 24px; }
        .gap-1 { gap: 8px; }
        .gap-2 { gap: 16px; }
        .gap-3 { gap: 24px; }
        .fw-600 { font-weight: 600; }
        .fw-700 { font-weight: 700; }
        .text-center { text-align: center; }
        .d-flex { display: flex; }
        .align-center { align-items: center; }
        .justify-center { justify-content: center; }
        .flex-wrap { flex-wrap: wrap; }
        .w-100 { width: 100%; }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0DBE5E;
            --primary-dark: #0AA54E;
            --primary-light: #1FCF6E;
            --accent: #FF6D00;
            --accent-dark: #E65C00;
            --accent-light: #FF8A33;
            --dark-bg: #0A0E17;
            --dark-bg-light: #141A26;
            --light-bg: #F7F9FC;
            --white: #FFFFFF;
            --text-primary: #1A1F2E;
            --text-secondary: #5A6377;
            --text-muted: #8E95A5;
            --border-color: #E8EDF2;
            --shadow-sm: 0 2px 8px rgba(10,14,23,0.05);
            --shadow-md: 0 4px 20px rgba(10,14,23,0.08);
            --shadow-lg: 0 8px 32px rgba(10,14,23,0.12);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --font-stack: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            --nav-width: 68px;
            --nav-expanded: 200px;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* ===== 基础 Reset ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-stack);
            font-size: 16px;
            line-height: 1.6;
            color: var(--text-primary);
            background: var(--light-bg);
            padding-left: var(--nav-width);
            min-height: 100vh;
        }
        a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--primary-dark); }
        a:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        button, input, textarea { font-family: inherit; font-size: inherit; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.4; color: var(--text-primary); }

        /* ===== 左侧导航 ===== */
        .side-nav {
            position: fixed;
            left: 0;
            top: 0;
            width: var(--nav-width);
            height: 100vh;
            background: var(--dark-bg);
            display: flex;
            flex-direction: column;
            align-items: center;
            padding: 16px 0;
            z-index: 1050;
            transition: width var(--transition);
            overflow: hidden;
            box-shadow: 2px 0 12px rgba(0,0,0,0.3);
        }
        .side-nav:hover { width: var(--nav-expanded); }
        .nav-logo {
            font-size: 18px;
            font-weight: 700;
            color: var(--primary);
            width: 100%;
            text-align: center;
            padding: 10px 0;
            margin-bottom: 24px;
            white-space: nowrap;
            letter-spacing: -0.3px;
            flex-shrink: 0;
        }
        .nav-logo span { color: var(--white); }
        .nav-items {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 4px;
            width: 100%;
            flex: 1;
        }
        .nav-item {
            display: flex;
            align-items: center;
            gap: 12px;
            width: 100%;
            padding: 12px 18px;
            color: #7B8794;
            font-size: 14px;
            font-weight: 500;
            white-space: nowrap;
            transition: all var(--transition);
            border-left: 3px solid transparent;
            text-decoration: none;
            position: relative;
        }
        .nav-item i { font-size: 20px; width: 24px; text-align: center; flex-shrink: 0; }
        .nav-item .nav-label { opacity: 0; transition: opacity var(--transition); font-size: 14px; }
        .side-nav:hover .nav-item .nav-label { opacity: 1; }
        .nav-item:hover, .nav-item.active {
            color: var(--white);
            background: rgba(13,190,94,0.12);
            border-left-color: var(--primary);
        }
        .nav-item.active i { color: var(--primary); }
        .nav-item:hover i { color: var(--primary-light); }
        .nav-item:focus-visible { outline: 2px solid var(--primary); outline-offset: -2px; }

        /* ===== 主内容区 ===== */
        .main-wrapper {
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        .main-content {
            flex: 1;
            padding: 40px 32px 60px;
            max-width: 1060px;
            width: 100%;
            margin: 0 auto;
        }

        /* ===== 面包屑 ===== */
        .breadcrumb-nav {
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 28px;
            padding: 10px 16px;
            background: var(--white);
            border-radius: var(--radius-sm);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
        }
        .breadcrumb-nav a { color: var(--primary); }
        .breadcrumb-nav a:hover { color: var(--primary-dark); text-decoration: underline; }
        .breadcrumb-nav .sep { margin: 0 8px; color: var(--text-muted); }
        .breadcrumb-nav .current { color: var(--text-secondary); font-weight: 500; }

        /* ===== 文章区块 ===== */
        .article-card {
            background: var(--white);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border-color);
            padding: 40px 48px 48px;
            margin-bottom: 40px;
        }
        .article-header {
            margin-bottom: 32px;
            padding-bottom: 24px;
            border-bottom: 1px solid var(--border-color);
        }
        .article-header h1 {
            font-size: 32px;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.35;
            letter-spacing: -0.5px;
            margin-bottom: 16px;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 16px 24px;
            font-size: 14px;
            color: var(--text-muted);
            align-items: center;
        }
        .article-meta .category-badge {
            display: inline-block;
            background: var(--primary);
            color: var(--white);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 20px;
            letter-spacing: 0.3px;
        }
        .article-meta .date-icon { margin-right: 4px; color: var(--primary); }

        /* ===== 正文区 ===== */
        .article-body {
            max-width: 760px;
            margin: 0 auto;
        }
        .article-body p {
            font-size: 16px;
            line-height: 1.8;
            letter-spacing: 0.5px;
            color: var(--text-primary);
            margin-bottom: 1.5em;
        }
        .article-body h2 {
            font-size: 28px;
            font-weight: 700;
            margin-top: 40px;
            margin-bottom: 16px;
            color: var(--text-primary);
            letter-spacing: -0.3px;
        }
        .article-body h3 {
            font-size: 22px;
            font-weight: 700;
            margin-top: 32px;
            margin-bottom: 12px;
            color: var(--text-primary);
        }
        .article-body ul, .article-body ol {
            margin-bottom: 1.5em;
            padding-left: 24px;
        }
        .article-body ul li {
            list-style: disc;
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-primary);
            margin-bottom: 6px;
        }
        .article-body ol li {
            list-style: decimal;
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-primary);
            margin-bottom: 6px;
        }
        .article-body blockquote {
            background: var(--light-bg);
            border-left: 4px solid var(--primary);
            padding: 16px 24px;
            margin-bottom: 1.5em;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-size: 16px;
            line-height: 1.7;
        }
        .article-body img {
            max-width: 100%;
            border-radius: var(--radius-sm);
            margin: 24px 0;
            box-shadow: var(--shadow-sm);
        }
        .article-body code {
            background: var(--light-bg);
            padding: 2px 10px;
            border-radius: 4px;
            font-size: 14px;
            color: var(--accent-dark);
            border: 1px solid var(--border-color);
        }
        .article-body pre {
            background: var(--dark-bg);
            color: #E8EDF2;
            padding: 20px 24px;
            border-radius: var(--radius-sm);
            overflow-x: auto;
            margin-bottom: 1.5em;
            font-size: 14px;
            line-height: 1.6;
        }
        .article-body pre code { background: transparent; color: inherit; border: none; padding: 0; }

        /* ===== 内容未找到 ===== */
        .not-found-box {
            text-align: center;
            padding: 80px 24px;
            background: var(--white);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
        }
        .not-found-box i { font-size: 64px; color: var(--text-muted); margin-bottom: 24px; }
        .not-found-box h2 { font-size: 24px; color: var(--text-primary); margin-bottom: 12px; }
        .not-found-box p { color: var(--text-secondary); font-size: 16px; margin-bottom: 24px; }
        .not-found-box .btn-home {
            display: inline-block;
            padding: 12px 32px;
            background: var(--primary);
            color: var(--white);
            border-radius: var(--radius-md);
            font-weight: 600;
            transition: all var(--transition);
        }
        .not-found-box .btn-home:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: var(--shadow-md); }

        /* ===== 相关推荐 ===== */
        .related-section {
            margin-top: 48px;
        }
        .related-section h3 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 24px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .related-section h3 i { color: var(--primary); font-size: 20px; }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .related-card {
            background: var(--white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            padding: 20px 20px 18px;
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .related-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); border-color: var(--primary); }
        .related-card .rc-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            line-height: 1.5;
        }
        .related-card .rc-meta {
            font-size: 12px;
            color: var(--text-muted);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .related-card .rc-link { color: var(--primary); font-weight: 500; font-size: 13px; }
        .related-card .rc-link:hover { text-decoration: underline; }

        /* ===== 返回按钮 ===== */
        .back-home-wrap {
            margin-top: 32px;
            text-align: center;
        }
        .back-home-wrap .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            background: var(--white);
            color: var(--text-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            font-weight: 500;
            transition: all var(--transition);
        }
        .back-home-wrap .btn-back:hover { background: var(--primary); color: var(--white); border-color: var(--primary); transform: translateY(-2px); box-shadow: var(--shadow-md); }
        .back-home-wrap .btn-back i { font-size: 16px; }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--dark-bg);
            color: #B0BEC5;
            padding: 48px 32px 28px;
            margin-top: auto;
        }
        .footer .container { max-width: 1280px; margin: 0 auto; }
        .footer .row { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 32px; }
        .footer .footer-brand .logo-text { font-size: 20px; font-weight: 700; color: var(--white); margin-bottom: 12px; }
        .footer .footer-brand .logo-text span { color: var(--primary); }
        .footer .footer-brand p { font-size: 14px; line-height: 1.7; color: #8E95A5; }
        .footer h5 { font-size: 15px; font-weight: 600; color: var(--white); margin-bottom: 16px; }
        .footer a { display: block; color: #B0BEC5; font-size: 14px; margin-bottom: 8px; transition: color var(--transition); }
        .footer a:hover { color: var(--primary); }
        .footer .contact-item { font-size: 14px; margin-bottom: 10px; display: flex; align-items: center; gap: 8px; }
        .footer .contact-item i { color: var(--primary); width: 18px; }
        .footer .social-icons { display: flex; gap: 14px; margin-top: 12px; }
        .footer .social-icons a { font-size: 20px; color: #B0BEC5; margin-bottom: 0; }
        .footer .social-icons a:hover { color: var(--primary); }
        .footer .footer-bottom {
            text-align: center;
            padding-top: 28px;
            margin-top: 28px;
            border-top: 1px solid rgba(255,255,255,0.06);
            font-size: 12px;
            color: #6B7A8A;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 991px) {
            body { padding-left: 0; }
            .side-nav {
                flex-direction: row;
                width: 100%;
                height: 56px;
                padding: 0 16px;
                box-shadow: 0 2px 12px rgba(0,0,0,0.3);
                position: relative;
            }
            .side-nav:hover { width: 100%; }
            .nav-logo { margin-bottom: 0; padding: 0 16px 0 0; width: auto; font-size: 16px; border-right: 1px solid rgba(255,255,255,0.08); }
            .nav-items { flex-direction: row; gap: 2px; flex: 1; justify-content: flex-end; }
            .nav-item { padding: 8px 14px; border-left: none; border-bottom: 2px solid transparent; width: auto; }
            .nav-item .nav-label { opacity: 1; font-size: 12px; }
            .nav-item i { font-size: 18px; }
            .nav-item:hover, .nav-item.active { border-left-color: transparent; border-bottom-color: var(--primary); }
            .main-content { padding: 24px 16px 40px; }
            .article-card { padding: 24px 20px 32px; }
            .article-header h1 { font-size: 26px; }
            .related-grid { grid-template-columns: repeat(2, 1fr); }
            .footer .row { grid-template-columns: 1fr 1fr; }
        }

        @media (max-width: 767px) {
            .side-nav { height: 50px; padding: 0 12px; }
            .nav-logo { font-size: 14px; padding-right: 12px; }
            .nav-item { padding: 6px 10px; }
            .nav-item .nav-label { display: none; }
            .nav-item i { font-size: 16px; }
            .main-content { padding: 16px 12px 32px; }
            .breadcrumb-nav { font-size: 12px; padding: 8px 12px; }
            .article-card { padding: 16px 14px 24px; border-radius: var(--radius-md); }
            .article-header h1 { font-size: 22px; }
            .article-header { margin-bottom: 20px; padding-bottom: 16px; }
            .article-meta { gap: 10px 16px; font-size: 13px; }
            .article-body p { font-size: 15px; }
            .article-body h2 { font-size: 24px; }
            .article-body h3 { font-size: 20px; }
            .related-grid { grid-template-columns: 1fr; }
            .footer { padding: 32px 16px 20px; }
            .footer .row { grid-template-columns: 1fr; gap: 24px; }
            .back-home-wrap .btn-back { width: 100%; justify-content: center; }
        }

        @media (max-width: 520px) {
            .side-nav { height: 46px; }
            .nav-logo { font-size: 12px; padding-right: 8px; }
            .nav-item { padding: 4px 8px; }
            .nav-item i { font-size: 14px; }
            .main-content { padding: 12px 8px 24px; }
            .article-card { padding: 12px 10px 20px; }
            .article-header h1 { font-size: 20px; }
            .article-body p { font-size: 14px; line-height: 1.7; }
            .article-body h2 { font-size: 21px; }
            .article-body h3 { font-size: 18px; }
            .related-card .rc-title { font-size: 14px; }
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0DBE5E;
            --primary-dark: #0AA050;
            --primary-light: #E8F8EF;
            --accent: #FF6D00;
            --accent-dark: #E65C00;
            --dark-bg: #0A0E17;
            --dark-bg2: #121926;
            --light-bg: #F7F9FC;
            --white: #FFFFFF;
            --text-primary: #1A1D26;
            --text-secondary: #4A5568;
            --text-muted: #7B8794;
            --text-light: #B0BEC5;
            --border-color: #E8EDF2;
            --shadow-sm: 0 2px 8px rgba(10,14,23,0.06);
            --shadow-md: 0 4px 20px rgba(10,14,23,0.08);
            --shadow-lg: 0 8px 32px rgba(10,14,23,0.12);
            --radius-card: 16px;
            --radius-sm: 8px;
            --radius-lg: 12px;
            --font-stack: "PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
            --nav-width: 64px;
            --transition: all 0.25s cubic-bezier(0.4,0,0.2,1);
        }

        /* ===== Reset & Base ===== */
        *,*::before,*::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-stack);
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-primary);
            background: var(--light-bg);
            padding-left: var(--nav-width);
            letter-spacing: 0.5px;
        }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-dark); }
        img { max-width: 100%; height: auto; border-radius: var(--radius-sm); }
        h1,h2,h3,h4,h5,h6 { font-weight: 700; line-height: 1.4; letter-spacing: -0.5px; color: var(--text-primary); }
        p { margin-bottom: 1rem; }
        ul,ol { padding-left: 1.25rem; }

        /* ===== Container ===== */
        .container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }

        /* ===== 左侧导航 App Shell ===== */
        .side-nav {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--nav-width);
            height: 100vh;
            background: var(--dark-bg);
            display: flex;
            flex-direction: column;
            align-items: center;
            padding: 16px 0;
            z-index: 1050;
            transition: var(--transition);
            border-right: 1px solid rgba(255,255,255,0.04);
        }
        .nav-logo {
            font-size: 14px;
            font-weight: 700;
            color: var(--white);
            letter-spacing: 0;
            writing-mode: vertical-lr;
            text-orientation: mixed;
            padding: 8px 4px;
            margin-bottom: 24px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            border-radius: var(--radius-sm);
            line-height: 1.3;
            min-height: 80px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .nav-items {
            display: flex;
            flex-direction: column;
            gap: 8px;
            flex: 1;
            width: 100%;
            padding: 0 8px;
        }
        .nav-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            padding: 10px 0;
            border-radius: var(--radius-sm);
            color: var(--text-muted);
            transition: var(--transition);
            position: relative;
            text-decoration: none;
            font-size: 10px;
            gap: 4px;
        }
        .nav-item i { font-size: 20px; }
        .nav-item .nav-label { font-size: 10px; white-space: nowrap; opacity: 0.8; }
        .nav-item:hover { color: var(--white); background: rgba(255,255,255,0.06); }
        .nav-item.active {
            color: var(--primary);
            background: rgba(13,190,94,0.10);
        }
        .nav-item.active::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 3px;
            height: 24px;
            background: var(--primary);
            border-radius: 0 3px 3px 0;
        }
        .nav-item:hover { color: var(--white); }

        /* ===== Header 移动端 ===== */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 56px;
            background: var(--dark-bg);
            z-index: 1040;
            padding: 0 16px;
            align-items: center;
            justify-content: space-between;
            border-bottom: 1px solid rgba(255,255,255,0.06);
        }
        .mobile-header .logo-text {
            font-size: 18px;
            font-weight: 700;
            color: var(--white);
        }
        .mobile-header .logo-text span { color: var(--primary); }
        .mobile-toggle {
            background: none;
            border: none;
            color: var(--white);
            font-size: 24px;
            padding: 8px;
            cursor: pointer;
        }
        .mobile-drawer {
            display: none;
            position: fixed;
            top: 56px;
            left: 0;
            right: 0;
            bottom: 0;
            background: var(--dark-bg);
            z-index: 1030;
            padding: 24px;
            flex-direction: column;
            gap: 8px;
            overflow-y: auto;
        }
        .mobile-drawer.open { display: flex; }
        .mobile-drawer .nav-item {
            flex-direction: row;
            justify-content: flex-start;
            gap: 12px;
            padding: 14px 16px;
            font-size: 15px;
            border-radius: var(--radius-sm);
        }
        .mobile-drawer .nav-item i { font-size: 20px; width: 28px; text-align: center; }
        .mobile-drawer .nav-item .nav-label { font-size: 15px; }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 520px;
            display: flex;
            align-items: center;
            background: var(--dark-bg);
            overflow: hidden;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.35;
            z-index: 0;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10,14,23,0.88) 40%, rgba(10,14,23,0.60) 80%, rgba(10,14,23,0.30) 100%);
            z-index: 1;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            padding: 80px 0;
            max-width: 720px;
        }
        .hero-badge {
            display: inline-block;
            padding: 6px 18px;
            background: rgba(13,190,94,0.18);
            color: var(--primary);
            border-radius: 20px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 20px;
            border: 1px solid rgba(13,190,94,0.25);
        }
        .hero h1 {
            font-size: 48px;
            font-weight: 700;
            color: var(--white);
            line-height: 1.2;
            margin-bottom: 16px;
        }
        .hero h1 span { color: var(--primary); }
        .hero-sub {
            font-size: 20px;
            color: var(--text-light);
            font-weight: 400;
            letter-spacing: 0.5px;
            margin-bottom: 32px;
            line-height: 1.6;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn-primary-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 36px;
            background: var(--primary);
            color: var(--white);
            border: none;
            border-radius: var(--radius-lg);
            font-size: 16px;
            font-weight: 700;
            cursor: pointer;
            transition: var(--transition);
        }
        .btn-primary-custom:hover {
            background: var(--primary-dark);
            color: var(--white);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(13,190,94,0.30);
        }
        .btn-outline-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 36px;
            background: transparent;
            color: var(--white);
            border: 2px solid rgba(255,255,255,0.25);
            border-radius: var(--radius-lg);
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }
        .btn-outline-custom:hover {
            border-color: var(--white);
            color: var(--white);
            background: rgba(255,255,255,0.06);
            transform: translateY(-2px);
        }

        /* ===== Section通用 ===== */
        .section { padding: 80px 0; }
        .section-title {
            font-size: 32px;
            font-weight: 700;
            text-align: center;
            margin-bottom: 12px;
            color: var(--text-primary);
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            text-align: center;
            max-width: 600px;
            margin: 0 auto 48px;
            letter-spacing: 0.5px;
        }
        .section.dark {
            background: var(--dark-bg);
        }
        .section.dark .section-title { color: var(--white); }
        .section.dark .section-subtitle { color: var(--text-light); }

        /* ===== 特色卡片 ===== */
        .feature-card {
            background: var(--white);
            border-radius: var(--radius-card);
            padding: 32px 24px;
            height: 100%;
            box-shadow: var(--shadow-md);
            transition: var(--transition);
            border: 1px solid var(--border-color);
            text-align: center;
        }
        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(13,190,94,0.20);
        }
        .feature-icon {
            width: 64px;
            height: 64px;
            margin: 0 auto 20px;
            background: var(--primary-light);
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            color: var(--primary);
            transition: var(--transition);
        }
        .feature-card:hover .feature-icon {
            background: var(--primary);
            color: var(--white);
        }
        .feature-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .feature-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ===== 赛事覆盖 ===== */
        .sport-grid {
            display: grid;
            grid-template-columns: repeat(4,1fr);
            gap: 20px;
        }
        .sport-item {
            background: var(--white);
            border-radius: var(--radius-card);
            padding: 28px 16px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            cursor: default;
        }
        .sport-item:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
            border-color: rgba(13,190,94,0.20);
        }
        .sport-item i {
            font-size: 36px;
            color: var(--primary);
            margin-bottom: 12px;
            display: block;
        }
        .sport-item h4 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .sport-item p {
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 0;
        }

        /* ===== 使用流程 ===== */
        .step-card {
            text-align: center;
            padding: 24px;
            position: relative;
        }
        .step-number {
            width: 48px;
            height: 48px;
            margin: 0 auto 16px;
            background: var(--primary);
            color: var(--white);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 700;
        }
        .step-card h4 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .step-card p {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 0;
        }
        .step-connector {
            display: none;
        }
        @media (min-width: 768px) {
            .step-connector {
                display: block;
                position: absolute;
                top: 48px;
                right: -24px;
                width: 48px;
                height: 2px;
                background: var(--primary);
                opacity: 0.3;
            }
        }

        /* ===== 统计数据 ===== */
        .stat-grid {
            display: grid;
            grid-template-columns: repeat(4,1fr);
            gap: 24px;
        }
        .stat-item {
            text-align: center;
            padding: 32px 16px;
            background: rgba(255,255,255,0.04);
            border-radius: var(--radius-card);
            border: 1px solid rgba(255,255,255,0.06);
            transition: var(--transition);
        }
        .stat-item:hover {
            background: rgba(255,255,255,0.07);
            transform: translateY(-2px);
        }
        .stat-number {
            font-size: 40px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 6px;
        }
        .stat-label {
            font-size: 14px;
            color: var(--text-light);
            font-weight: 400;
        }

        /* ===== 评价墙 ===== */
        .review-card {
            background: var(--white);
            border-radius: var(--radius-card);
            padding: 24px;
            border: 1px solid var(--border-color);
            height: 100%;
            transition: var(--transition);
        }
        .review-card:hover {
            box-shadow: var(--shadow-md);
        }
        .review-header {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 12px;
        }
        .review-avatar {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--primary);
            flex-shrink: 0;
        }
        .review-name { font-size: 15px; font-weight: 600; }
        .review-stars { color: var(--accent); font-size: 14px; letter-spacing: 2px; }
        .review-text {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 0;
        }

        /* ===== FAQ ===== */
        .faq-item {
            background: var(--white);
            border-radius: var(--radius-sm);
            margin-bottom: 8px;
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: rgba(13,190,94,0.20); }
        .faq-question {
            padding: 18px 20px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            color: var(--text-primary);
            transition: var(--transition);
        }
        .faq-question:hover { background: var(--light-bg); }
        .faq-question i { transition: transform 0.3s; color: var(--text-muted); font-size: 14px; }
        .faq-item.open .faq-question i { transform: rotate(180deg); color: var(--primary); }
        .faq-answer {
            padding: 0 20px 18px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            display: none;
        }
        .faq-item.open .faq-answer { display: block; }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--dark-bg);
            text-align: center;
            padding: 80px 0;
        }
        .cta-section h2 {
            font-size: 36px;
            color: var(--white);
            margin-bottom: 16px;
        }
        .cta-section p {
            font-size: 18px;
            color: var(--text-light);
            max-width: 560px;
            margin: 0 auto 32px;
        }
        .cta-section .btn-primary-custom {
            padding: 16px 48px;
            font-size: 18px;
            background: var(--accent);
        }
        .cta-section .btn-primary-custom:hover {
            background: var(--accent-dark);
            box-shadow: 0 6px 20px rgba(255,109,0,0.30);
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--dark-bg);
            color: var(--text-light);
            padding: 60px 0 0;
            border-top: 1px solid rgba(255,255,255,0.04);
        }
        .footer .logo-text {
            font-size: 22px;
            font-weight: 700;
            color: var(--white);
            margin-bottom: 12px;
        }
        .footer .logo-text span { color: var(--primary); }
        .footer p { font-size: 14px; line-height: 1.8; margin-bottom: 0; }
        .footer h5 {
            font-size: 16px;
            font-weight: 700;
            color: var(--white);
            margin-bottom: 16px;
        }
        .footer a {
            display: block;
            color: var(--text-light);
            font-size: 14px;
            padding: 4px 0;
            transition: var(--transition);
        }
        .footer a:hover { color: var(--primary); padding-left: 4px; }
        .contact-item {
            font-size: 14px;
            padding: 4px 0;
            color: var(--text-light);
        }
        .contact-item i {
            width: 20px;
            color: var(--primary);
            margin-right: 8px;
        }
        .social-icons {
            display: flex;
            gap: 12px;
            margin-top: 12px;
        }
        .social-icons a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255,255,255,0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-light);
            font-size: 16px;
            transition: var(--transition);
            padding: 0;
        }
        .social-icons a:hover {
            background: var(--primary);
            color: var(--white);
            padding: 0;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.04);
            padding: 20px 0;
            margin-top: 48px;
            font-size: 12px;
            text-align: center;
            color: var(--text-muted);
            letter-spacing: 0.5px;
        }

        /* ===== 面板分隔装饰 ===== */
        .divider-wave {
            width: 60px;
            height: 4px;
            background: var(--primary);
            border-radius: 4px;
            margin: 0 auto 32px;
            opacity: 0.6;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1199px) {
            .sport-grid { grid-template-columns: repeat(2,1fr); }
            .stat-grid { grid-template-columns: repeat(2,1fr); }
        }
        @media (max-width: 991px) {
            body { padding-left: 0; padding-top: 56px; }
            .side-nav { display: none; }
            .mobile-header { display: flex; }
            .hero h1 { font-size: 36px; }
            .hero-sub { font-size: 17px; }
            .section { padding: 60px 0; }
            .section-title { font-size: 28px; }
        }
        @media (max-width: 767px) {
            .hero { min-height: 420px; }
            .hero h1 { font-size: 28px; }
            .hero-sub { font-size: 15px; }
            .hero-actions { flex-direction: column; }
            .hero-actions .btn-primary-custom,
            .hero-actions .btn-outline-custom { width: 100%; justify-content: center; }
            .sport-grid { grid-template-columns: repeat(2,1fr); gap: 12px; }
            .stat-grid { grid-template-columns: repeat(2,1fr); gap: 12px; }
            .stat-number { font-size: 32px; }
            .section { padding: 48px 0; }
            .section-title { font-size: 24px; }
            .section-subtitle { font-size: 14px; margin-bottom: 32px; }
            .feature-card { padding: 24px 16px; }
            .sport-item { padding: 20px 12px; }
            .sport-item i { font-size: 28px; }
            .cta-section h2 { font-size: 26px; }
            .cta-section p { font-size: 15px; }
            .footer .col-md-4 { margin-bottom: 24px; }
            .review-card { margin-bottom: 16px; }
            .step-card { margin-bottom: 24px; }
        }
        @media (max-width: 480px) {
            .sport-grid { grid-template-columns: 1fr 1fr; gap: 8px; }
            .stat-grid { grid-template-columns: 1fr 1fr; gap: 8px; }
            .hero h1 { font-size: 24px; }
            .container { padding: 0 16px; }
        }

        /* ===== 工具类 ===== */
        .text-primary { color: var(--primary) !important; }
        .bg-primary-light { background: var(--primary-light); }
        .mt-2 { margin-top: 8px; }
        .mb-2 { margin-bottom: 8px; }
        .gap-2 { gap: 8px; }
        .gap-3 { gap: 16px; }
        .gap-4 { gap: 24px; }

        /* ===== 滚动条 ===== */
        ::-webkit-scrollbar { width: 6px; }
        ::-webkit-scrollbar-track { background: var(--light-bg); }
        ::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 6px; }
        ::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

        /* ===== 加载动画 ===== */
        @keyframes fadeInUp {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .animate-in {
            animation: fadeInUp 0.6s ease forwards;
        }
        .delay-1 { animation-delay: 0.1s; }
        .delay-2 { animation-delay: 0.2s; }
        .delay-3 { animation-delay: 0.3s; }
        .delay-4 { animation-delay: 0.4s; }