/* roulang page: index */
:root {
            --primary: #2E7D5B;
            --primary-dark: #1E5C41;
            --primary-light: #4A9B78;
            --secondary: #C9955C;
            --secondary-dark: #A67644;
            --accent: #E8C69A;
            --ink: #2A211C;
            --ink-soft: #6B5E55;
            --cream: #FAF5EE;
            --surface: #FFFFFF;
            --line: #E9DFD3;
            --shadow-sm: 0 2px 10px rgba(42, 33, 28, .06);
            --shadow-md: 0 10px 30px rgba(42, 33, 28, .10);
            --shadow-lg: 0 20px 50px rgba(42, 33, 28, .16);
            --radius: 16px;
            --radius-sm: 10px;
            --radius-lg: 24px;
            --transition: all .25s ease;
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            scroll-padding-top: 80px;
        }

        body {
            margin: 0;
            font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
            background: var(--cream);
            color: var(--ink);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

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

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

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

        .navbar-custom {
            background: rgba(250, 245, 238, .92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--line);
            padding: 12px 0;
            box-shadow: 0 1px 0 rgba(43, 33, 28, .05);
        }

        .navbar-custom .navbar-brand {
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--primary) !important;
            display: flex;
            align-items: center;
            gap: 10px;
            letter-spacing: -.02em;
        }

        .brand-mark {
            width: 42px;
            height: 42px;
            border-radius: 14px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.1rem;
            box-shadow: 0 4px 12px rgba(46, 125, 91, .32);
        }

        .brand-suffix {
            color: var(--ink);
            font-weight: 700;
        }

        .navbar-custom .nav-link {
            font-weight: 600;
            color: var(--ink) !important;
            padding: 8px 18px !important;
            border-radius: 50px;
            transition: var(--transition);
        }

        .navbar-custom .nav-link:hover,
        .navbar-custom .nav-link.active {
            color: var(--primary) !important;
            background: rgba(46, 125, 91, .10);
        }

        .navbar-toggler {
            border: none;
            padding: 6px 10px;
        }

        .navbar-toggler:focus {
            box-shadow: 0 0 0 .25rem rgba(46, 125, 91, .18);
        }

        .btn {
            border-radius: 50px;
            font-weight: 700;
            padding: 10px 26px;
            transition: var(--transition);
            line-height: 1.5;
        }

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

        .btn:focus,
        .form-control:focus,
        .form-select:focus {
            outline: none;
            box-shadow: 0 0 0 .25rem rgba(46, 125, 91, .18);
        }

        .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;
        }

        .btn-outline-brand {
            border: 2px solid var(--primary);
            color: var(--primary);
            background: transparent;
        }

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

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

        .btn-amber:hover {
            background: var(--secondary-dark);
            border-color: var(--secondary-dark);
            color: #fff;
        }

        .btn-ghost-light {
            border: 2px solid rgba(255, 255, 255, .65);
            color: #fff;
            background: transparent;
        }

        .btn-ghost-light:hover {
            background: #fff;
            color: var(--primary);
            border-color: #fff;
        }

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            padding: 120px 0 72px;
            background:
                radial-gradient(ellipse at 20% 20%, rgba(232, 198, 154, .30), transparent 50%),
                radial-gradient(ellipse at 80% 80%, rgba(46, 125, 91, .18), transparent 50%),
                linear-gradient(160deg, #FBF6EF 0%, #F4EBDD 100%);
            overflow: hidden;
        }

        .hero-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
            opacity: .12;
            z-index: 0;
        }

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

        .hero-stage {
            background: rgba(255, 255, 255, .78);
            border: 1px solid rgba(255, 255, 255, .92);
            border-radius: var(--radius-lg);
            padding: 48px 38px 40px;
            backdrop-filter: blur(8px);
            box-shadow: var(--shadow-lg);
            text-align: center;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(46, 125, 91, .12);
            color: var(--primary);
            border: 1px solid rgba(46, 125, 91, .22);
            padding: 7px 18px;
            border-radius: 50px;
            font-weight: 600;
            font-size: .9rem;
            margin-bottom: 20px;
        }

        .hero-shot {
            width: 200px;
            height: 200px;
            border-radius: 50%;
            object-fit: cover;
            border: 6px solid #fff;
            box-shadow: 0 12px 40px rgba(42, 33, 28, .20);
            margin-bottom: 28px;
        }

        .hero-title {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.28;
            letter-spacing: -.02em;
            color: var(--ink);
            margin-bottom: 16px;
        }

        .hero-title .text-brand {
            color: var(--primary);
        }

        .hero-subtitle {
            font-size: 1.05rem;
            color: var(--ink-soft);
            max-width: 640px;
            margin: 0 auto 28px;
        }

        .hero-cta .btn {
            min-width: 160px;
        }

        .hero-side-card {
            background: rgba(255, 255, 255, .85);
            border: 1px solid rgba(255, 255, 255, .92);
            border-radius: var(--radius);
            padding: 18px 16px;
            box-shadow: var(--shadow-sm);
            margin-bottom: 16px;
            backdrop-filter: blur(6px);
            display: flex;
            gap: 12px;
            align-items: flex-start;
            transition: var(--transition);
        }

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

        .hero-side-card .fa-solid,
        .hero-side-card .fa-regular {
            color: var(--primary);
            font-size: 1.3rem;
            margin-top: 3px;
            flex-shrink: 0;
        }

        .hero-side-card strong {
            display: block;
            font-size: .98rem;
            margin-bottom: 2px;
        }

        .hero-side-card span {
            color: var(--ink-soft);
            font-size: .85rem;
        }

        .hero-stats {
            margin-top: 56px;
            background: var(--surface);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            border: 1px solid var(--line);
            padding: 30px 20px;
        }

        .stat-number {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }

        .stat-label {
            color: var(--ink-soft);
            font-size: .95rem;
        }

        /* ===== Section components ===== */
        .section-head {
            max-width: 720px;
            margin: 0 auto 48px;
        }

        .section-head.text-start {
            max-width: 100%;
            margin-bottom: 32px;
        }

        .section-head h2 {
            font-weight: 800;
            font-size: 2.1rem;
            margin-bottom: 12px;
            color: var(--ink);
            letter-spacing: -.01em;
        }

        .section-head p {
            color: var(--ink-soft);
            font-size: 1.02rem;
        }

        .eyebrow {
            display: inline-block;
            background: rgba(46, 125, 91, .10);
            color: var(--primary);
            font-weight: 700;
            font-size: .82rem;
            letter-spacing: .06em;
            padding: 6px 16px;
            border-radius: 50px;
            margin-bottom: 14px;
            text-transform: none;
        }

        .eyebrow.light {
            background: rgba(255, 255, 255, .18);
            color: #fff;
        }

        /* ===== Compare ===== */
        .compare-section {
            padding: 90px 0;
            background:
                linear-gradient(180deg, rgba(250, 245, 238, .94), rgba(243, 234, 225, .98)),
                url('/assets/images/backpic/back-3.jpg') center/cover no-repeat;
        }

        .compare-wrap {
            background: var(--surface);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            border: 1px solid var(--line);
            padding: 16px;
        }

        .compare-table {
            margin-bottom: 0;
            vertical-align: middle;
        }

        .compare-table thead th {
            background: #F7F2EA;
            color: var(--ink);
            font-weight: 800;
            text-align: center;
            padding: 18px 16px;
            border-bottom: none;
            font-size: 1rem;
        }

        .compare-table thead th:first-child {
            text-align: left;
            border-radius: 12px 0 0 0;
        }

        .compare-table tbody td {
            text-align: center;
            padding: 16px;
            border-color: var(--line);
            font-weight: 500;
        }

        .compare-table tbody td:first-child {
            text-align: left;
            font-weight: 600;
            color: var(--ink);
        }

        .compare-table .recommended-th,
        .compare-table .recommended-td {
            background: rgba(46, 125, 91, .06);
            box-shadow: inset 0 0 0 1px rgba(46, 125, 91, .14);
            position: relative;
        }

        .compare-table .recommended-th {
            position: relative;
        }

        .compare-table .recommended-th::after {
            content: "推荐";
            position: absolute;
            top: -9px;
            right: 10px;
            background: var(--secondary);
            color: #fff;
            font-size: .7rem;
            font-weight: 700;
            padding: 3px 12px;
            border-radius: 50px;
            box-shadow: 0 2px 6px rgba(169, 118, 68, .35);
        }

        /* ===== Brand story ===== */
        .story-section {
            padding: 90px 0;
            background: var(--surface);
            border-top: 1px solid var(--line);
            border-bottom: 1px solid var(--line);
        }

        .story-section .eyebrow {
            margin-bottom: 16px;
        }

        .story-section h2 {
            font-size: 2.1rem;
            font-weight: 800;
            margin-bottom: 18px;
            letter-spacing: -.01em;
        }

        .story-section p {
            color: var(--ink-soft);
            margin-bottom: 16px;
        }

        .story-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }

        .story-card {
            border-radius: var(--radius);
            padding: 26px 22px;
            background: var(--cream);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--line);
            display: flex;
            flex-direction: column;
            gap: 6px;
            transition: var(--transition);
        }

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

        .story-card i {
            font-size: 1.4rem;
            color: var(--primary);
            margin-bottom: 6px;
        }

        .story-card strong {
            font-size: 1.08rem;
        }

        .story-card span {
            color: var(--ink-soft);
            font-size: .9rem;
        }

        /* ===== Plans / Group buy ===== */
        .plans-section {
            padding: 90px 0;
            background: #F4EDE2;
            border-bottom: 1px solid var(--line);
        }

        .guide-steps .step-card {
            background: var(--surface);
            border-radius: var(--radius);
            padding: 28px 24px;
            border: 1px solid var(--line);
            box-shadow: var(--shadow-sm);
            height: 100%;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .step-card::after {
            content: "";
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 4px;
            background: var(--primary);
        }

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

        .step-num {
            font-size: 2.4rem;
            font-weight: 800;
            line-height: 1;
            margin-bottom: 14px;
            color: transparent;
            -webkit-text-stroke: 1.5px var(--secondary);
        }

        .step-card h5 {
            font-weight: 800;
            font-size: 1.1rem;
            margin-bottom: 8px;
        }

        .step-card p {
            color: var(--ink-soft);
            margin-bottom: 0;
            font-size: .95rem;
        }

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

        .group-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }

        .card-img-wrap {
            height: 200px;
            overflow: hidden;
            position: relative;
        }

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

        .group-card:hover .card-img-wrap img {
            transform: scale(1.05);
        }

        .card-badge {
            position: absolute;
            top: 14px;
            left: 14px;
            background: var(--secondary);
            color: #fff;
            padding: 6px 14px;
            border-radius: 50px;
            font-size: .8rem;
            font-weight: 700;
            box-shadow: 0 4px 10px rgba(0, 0, 0, .12);
        }

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

        .group-card .card-body h5 {
            font-weight: 800;
            font-size: 1.15rem;
            margin-bottom: 6px;
        }

        .group-card .card-body>p {
            color: var(--ink-soft);
            font-size: .92rem;
            margin-bottom: 14px;
        }

        .group-progress .progress {
            height: 8px;
            border-radius: 50px;
            background: #EFE5D8;
        }

        .group-progress .progress-bar {
            background: linear-gradient(90deg, var(--primary), var(--primary-light));
            border-radius: 50px;
        }

        .group-progress .text-muted {
            font-size: .85rem;
        }

        .price-row .current-price {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--secondary-dark);
        }

        .price-row .old-price {
            text-decoration: line-through;
            color: var(--ink-soft);
            font-size: .95rem;
        }

        /* ===== Articles ===== */
        .articles-section {
            padding: 90px 0;
            background: var(--cream);
        }

        .article-list .article-item {
            display: flex;
            align-items: flex-start;
            gap: 20px;
            padding: 22px 0;
            border-bottom: 1px solid var(--line);
            text-decoration: none;
            transition: var(--transition);
        }

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

        .article-list .article-item:hover {
            padding-left: 8px;
        }

        .article-index {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
            min-width: 40px;
            font-style: italic;
        }

        .article-body h4 {
            font-weight: 700;
            font-size: 1.08rem;
            color: var(--ink);
            margin-bottom: 6px;
            transition: var(--transition);
        }

        .article-list .article-item:hover .article-body h4 {
            color: var(--primary);
        }

        .article-body p {
            color: var(--ink-soft);
            margin-bottom: 8px;
            font-size: .93rem;
        }

        .article-meta {
            color: #9B8F82;
            font-size: .85rem;
        }

        .article-meta i {
            margin-right: 4px;
        }

        .side-card {
            background: var(--surface);
            border-radius: var(--radius);
            border: 1px solid var(--line);
            box-shadow: var(--shadow-sm);
            padding: 22px;
            margin-bottom: 20px;
        }

        .side-card h5 {
            font-weight: 800;
            font-size: 1.05rem;
            margin-bottom: 14px;
            position: relative;
            padding-left: 14px;
        }

        .side-card h5::before {
            content: "";
            position: absolute;
            left: 0;
            top: 4px;
            bottom: 4px;
            width: 4px;
            border-radius: 4px;
            background: var(--secondary);
        }

        .tag-cloud .tag {
            display: inline-block;
            background: #F1E9DE;
            color: var(--ink-soft);
            padding: 6px 14px;
            border-radius: 50px;
            font-size: .85rem;
            margin: 0 8px 8px 0;
            text-decoration: none;
            transition: var(--transition);
        }

        .tag-cloud .tag:hover {
            background: var(--primary);
            color: #fff;
        }

        .recommend-img {
            width: 70px;
            height: 70px;
            object-fit: cover;
            border-radius: 12px;
            flex-shrink: 0;
        }

        .side-cta-card {
            background: linear-gradient(145deg, var(--cream), #F3E8DB);
            text-align: center;
        }

        .side-cta-card h5::before {
            display: none;
        }

        /* ===== Join ===== */
        .join-section {
            padding: 96px 0;
            background:
                linear-gradient(120deg, rgba(43, 33, 28, .92), rgba(46, 125, 91, .82)),
                url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;
            color: #fff;
        }

        .join-section h2 {
            color: #fff;
        }

        .join-section .lead-muted {
            color: rgba(255, 255, 255, .85);
        }

        .join-list li {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 12px;
            color: rgba(255, 255, 255, .92);
        }

        .join-list .fa-check-circle {
            color: #7ED0A5;
        }

        .join-panel {
            background: rgba(255, 255, 255, .12);
            border: 1px solid rgba(255, 255, 255, .25);
            border-radius: var(--radius-lg);
            padding: 36px;
            backdrop-filter: blur(10px);
        }

        .join-panel h3 {
            font-weight: 800;
            color: #fff;
        }

        .join-panel .form-label {
            font-weight: 600;
            color: #fff;
            font-size: .92rem;
        }

        .join-panel .form-control,
        .join-panel .form-select {
            background: rgba(255, 255, 255, .95);
            border: none;
            border-radius: 12px;
            padding: 12px 16px;
            color: var(--ink);
        }

        .join-panel .form-control::placeholder {
            color: #9B8F82;
        }

        .form-note {
            font-size: .85rem;
            color: rgba(255, 255, 255, .75);
            text-align: center;
            margin-top: 14px;
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 90px 0;
            background: #F8F3EC;
        }

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

        .faq-accordion .accordion-button {
            font-weight: 700;
            color: var(--ink);
            background: var(--surface);
            padding: 20px 24px;
            font-size: 1rem;
            border-radius: var(--radius) !important;
        }

        .faq-accordion .accordion-button:not(.collapsed) {
            background: var(--surface);
            color: var(--primary);
            box-shadow: none;
        }

        .faq-accordion .accordion-button:focus {
            box-shadow: 0 0 0 .25rem rgba(46, 125, 91, .15);
        }

        .faq-accordion .accordion-body {
            color: var(--ink-soft);
            padding: 6px 24px 22px;
            line-height: 1.8;
        }

        /* ===== Footer ===== */
        .footer {
            background: #201812;
            color: #C9BEB0;
            padding: 72px 0 0;
        }

        .footer-brand {
            font-size: 1.25rem;
            font-weight: 800;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .footer-brand i {
            color: var(--secondary);
        }

        .footer p {
            font-size: .95rem;
        }

        .footer h5 {
            color: #fff;
            font-weight: 700;
            margin-bottom: 20px;
            font-size: 1.05rem;
        }

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

        .footer-links a {
            color: #C9BEB0;
            text-decoration: none;
            transition: var(--transition);
        }

        .footer-links a::before {
            content: "›";
            margin-right: 8px;
            color: var(--secondary);
        }

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

        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 10px;
            color: #C9BEB0;
        }

        .footer-contact i {
            color: var(--secondary);
            width: 18px;
            text-align: center;
        }

        .social-links .social-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, .1);
            color: #fff;
            margin-right: 8px;
            transition: var(--transition);
        }

        .social-links .social-icon:hover {
            background: var(--secondary);
            color: #fff;
            transform: translateY(-3px);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .12);
            margin-top: 48px;
            padding: 22px 0;
            font-size: .9rem;
            color: #9E9386;
        }

        .footer-bottom p {
            margin-bottom: 0;
        }

        /* ===== Responsive ===== */
        @media (max-width: 991.98px) {
            .hero-title {
                font-size: 2.2rem;
            }

            .hero-section {
                padding: 110px 0 52px;
            }

            .hero-stage {
                padding: 38px 24px 32px;
            }

            .hero-side-card {
                padding: 14px;
            }

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

            .section-head h2 {
                font-size: 1.8rem;
            }

            .navbar-collapse {
                background: var(--cream);
                border-radius: var(--radius);
                padding: 16px 12px;
                margin-top: 10px;
                box-shadow: var(--shadow-md);
            }
        }

        @media (max-width: 767.98px) {
            .hero-title {
                font-size: 1.85rem;
            }

            .hero-shot {
                width: 160px;
                height: 160px;
            }

            .hero-cta .btn {
                flex: 1;
                min-width: 140px;
                font-size: .95rem;
                padding: 10px 16px;
            }

            .stat-number {
                font-size: 1.4rem;
            }

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

            .section-head {
                margin-bottom: 32px;
            }

            .section-head h2 {
                font-size: 1.55rem;
            }

            .join-panel {
                padding: 24px 18px;
            }

            .compare-table thead th,
            .compare-table tbody td {
                padding: 12px 10px;
                font-size: .9rem;
            }
        }

        @media (max-width: 575.98px) {
            .hero-section {
                padding: 100px 0 40px;
            }

            .hero-side-card {
                font-size: .88rem;
            }

            .hero-stats {
                padding: 20px 12px;
            }

            .stat-number {
                font-size: 1.2rem;
            }

            .stat-label {
                font-size: .82rem;
            }

            .article-item {
                gap: 12px;
            }

            .article-index {
                font-size: 1.2rem;
                min-width: 28px;
            }

            .article-body h4 {
                font-size: .98rem;
            }

            .card-img-wrap {
                height: 170px;
            }

            .footer {
                text-align: center;
            }

            .footer-contact li {
                justify-content: center;
            }
        }