/* roulang page: index */
:root {
            --primary: #FF5A1F;
            --primary-dark: #E04A12;
            --accent: #0ED9C8;
            --accent-dark: #09B5A7;
            --dark-bg: #0B1220;
            --dark-bg-light: #151E30;
            --light-bg: #F4F6F9;
            --card-bg: #FFFFFF;
            --text-main: #1B2633;
            --text-muted: #5A6B7C;
            --border: #E4EAF1;
            --radius-xl: 20px;
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-card: 0 4px 16px rgba(0, 0, 0, 0.06);
            --shadow-hover: 0 8px 24px rgba(255, 90, 31, 0.15);
            --transition: 0.2s ease-in-out;
            --font-main: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-main);
            background: var(--light-bg);
            color: var(--text-main);
            line-height: 1.6;
            font-size: 16px;
        }

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

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

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

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        .container {
            max-width: 1200px;
            padding-left: 16px;
            padding-right: 16px;
        }

        /* 按钮 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            padding: 10px 24px;
            font-weight: 500;
            letter-spacing: 0.02em;
            transition: all var(--transition);
            border: 1px solid transparent;
        }

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

        .btn-primary:hover,
        .btn-primary:focus {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            transform: scale(1.02);
            box-shadow: 0 6px 20px rgba(255, 90, 31, 0.3);
        }

        .btn-outline-light {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, 0.6);
        }

        .btn-outline-light:hover,
        .btn-outline-light:focus {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            color: #fff;
        }

        .btn-accent {
            background: var(--accent);
            color: var(--dark-bg);
            border-color: var(--accent);
            font-weight: 600;
        }

        .btn-accent:hover,
        .btn-accent:focus {
            background: var(--accent-dark);
            border-color: var(--accent-dark);
            color: var(--dark-bg);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(14, 217, 200, 0.3);
        }

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

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

        .btn-sm {
            padding: 8px 16px;
            font-size: 14px;
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        /* 导航 */
        .site-header {
            padding: 16px 0;
            background: transparent;
            position: relative;
            z-index: 100;
        }

        .nav-panel {
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            padding: 12px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            border: 1px solid var(--border);
        }

        .brand-logo {
            display: flex;
            align-items: baseline;
            gap: 8px;
            flex-shrink: 0;
        }

        .brand-main {
            font-size: 26px;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: 0.02em;
            line-height: 1.2;
        }

        .brand-sub {
            font-size: 13px;
            color: var(--text-muted);
            font-weight: 400;
            line-height: 1.3;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-main);
            white-space: nowrap;
            transition: all var(--transition);
        }

        .nav-link:hover {
            background: rgba(255, 90, 31, 0.08);
            color: var(--primary);
        }

        .nav-link.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 12px rgba(255, 90, 31, 0.25);
        }

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

        .nav-cta {
            white-space: nowrap;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 42px;
            height: 42px;
            padding: 8px;
            background: transparent;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            cursor: pointer;
        }

        .nav-toggle span {
            display: block;
            height: 2px;
            width: 100%;
            background: var(--text-main);
            border-radius: 2px;
            transition: all var(--transition);
        }

        .nav-toggle[aria-expanded="true"] span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .nav-toggle[aria-expanded="true"] span:nth-child(2) {
            opacity: 0;
        }

        .nav-toggle[aria-expanded="true"] span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        .mobile-menu {
            display: none;
            margin-top: 12px;
            padding: 16px;
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
        }

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

        .mobile-menu .nav-link {
            display: flex;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            margin-bottom: 4px;
            width: 100%;
        }

        /* Hero */
        .hero {
            position: relative;
            background-color: var(--dark-bg);
            background-image: linear-gradient(135deg, rgba(11, 18, 32, 0.92), rgba(11, 18, 32, 0.85)), url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            color: #fff;
            padding: 80px 0 90px;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -20%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(255, 90, 31, 0.15) 0%, transparent 70%);
            pointer-events: none;
        }

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

        .hero-badge {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(255, 90, 31, 0.15);
            border: 1px solid rgba(255, 90, 31, 0.4);
            color: #FFB39A;
            font-size: 14px;
            border-radius: 999px;
            margin-bottom: 20px;
            font-weight: 500;
        }

        .hero h1 {
            font-size: 2.5rem;
            font-weight: 800;
            line-height: 1.35;
            margin-bottom: 16px;
            color: #fff;
            letter-spacing: 0.01em;
        }

        .hero h1 .highlight {
            color: var(--primary);
            position: relative;
            display: inline-block;
        }

        .hero h1 .highlight::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 2px;
            width: 100%;
            height: 4px;
            background: var(--primary);
            border-radius: 4px;
            opacity: 0.5;
        }

        .hero-sub {
            font-size: 16px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.85);
            max-width: 520px;
            margin-bottom: 28px;
        }

        .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            margin-bottom: 24px;
        }

        .hero-platforms {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
            color: rgba(255, 255, 255, 0.5);
            font-size: 13px;
        }

        .hero-platforms span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .hero-visual {
            position: relative;
            z-index: 1;
        }

        .hero-visual img {
            border-radius: var(--radius-xl);
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
            border: 1px solid rgba(255, 255, 255, 0.1);
        }

        /* 信任条 */
        .trust-bar {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-top: none;
            border-radius: 0 0 var(--radius-lg) var(--radius-lg);
            margin: -40px auto 0;
            position: relative;
            z-index: 10;
            max-width: 1120px;
            padding: 20px 24px;
            box-shadow: var(--shadow-card);
        }

        .trust-list {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }

        .trust-item {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-main);
            padding: 8px 12px;
            border-radius: var(--radius-sm);
            background: var(--light-bg);
        }

        .trust-item .icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: rgba(255, 90, 31, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .trust-item .icon svg {
            width: 18px;
            height: 18px;
            stroke: var(--primary);
            fill: none;
            stroke-width: 2;
            stroke-linecap: round;
            stroke-linejoin: round;
        }

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

        .section-title {
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 12px;
            line-height: 1.4;
        }

        .section-desc {
            color: var(--text-muted);
            max-width: 600px;
            margin-bottom: 40px;
            line-height: 1.8;
        }

        .section-head {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            margin-bottom: 36px;
            flex-wrap: wrap;
        }

        .section-head .section-title {
            margin-bottom: 0;
        }

        /* 优惠阶梯 */
        .promo-steps {
            background: var(--card-bg);
        }

        .promo-step {
            background: var(--light-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 32px 24px 28px;
            position: relative;
            transition: all var(--transition);
            height: 100%;
        }

        .promo-step:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(255, 90, 31, 0.2);
        }

        .promo-step .step-num {
            font-size: 48px;
            font-weight: 200;
            color: rgba(255, 90, 31, 0.15);
            display: block;
            line-height: 1;
            margin-bottom: 16px;
        }

        .promo-step .step-title {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .promo-step p {
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.8;
            margin-bottom: 16px;
        }

        .promo-step.featured {
            background: linear-gradient(180deg, rgba(255, 90, 31, 0.06), rgba(255, 90, 31, 0.02));
            border-color: rgba(255, 90, 31, 0.25);
            box-shadow: var(--shadow-card);
        }

        .promo-step.featured .step-num {
            color: rgba(255, 90, 31, 0.3);
        }

        .hot-badge {
            position: absolute;
            top: -10px;
            right: 16px;
            background: var(--accent);
            color: var(--dark-bg);
            font-size: 12px;
            font-weight: 600;
            padding: 3px 12px;
            border-radius: 999px;
            letter-spacing: 0.03em;
        }

        .btn-link-arrow {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            color: var(--primary);
            font-weight: 500;
            font-size: 14px;
        }

        .btn-link-arrow:hover {
            gap: 8px;
            color: var(--primary-dark);
        }

        /* 套餐对比 */
        .plan-compare {
            background: var(--light-bg);
        }

        .table-wrapper {
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            overflow-x: auto;
        }

        .table-wrapper table {
            width: 100%;
            border-collapse: collapse;
            min-width: 720px;
            margin: 0;
            font-size: 15px;
        }

        .table-wrapper thead th {
            background: var(--dark-bg);
            color: #fff;
            padding: 18px 20px;
            text-align: center;
            font-weight: 600;
            border: none;
        }

        .table-wrapper thead th:first-child {
            text-align: left;
            border-top-left-radius: var(--radius-lg);
        }

        .table-wrapper thead th:last-child {
            border-top-right-radius: var(--radius-lg);
        }

        .table-wrapper tbody td {
            padding: 16px 20px;
            border-bottom: 1px solid var(--border);
            text-align: center;
            color: var(--text-main);
            vertical-align: middle;
        }

        .table-wrapper tbody td:first-child {
            text-align: left;
            font-weight: 500;
            background: var(--light-bg);
        }

        .table-wrapper tbody tr:nth-child(even) td {
            background: #F8FAFC;
        }

        .table-wrapper tbody tr:nth-child(even) td:first-child {
            background: var(--light-bg);
        }

        .table-wrapper tbody tr:last-child td {
            border-bottom: none;
        }

        .plan-col.recommended {
            background: rgba(255, 90, 31, 0.04) !important;
            border-top: 3px solid var(--primary);
            position: relative;
        }

        .plan-col .btn {
            margin-top: 8px;
        }

        .plan-name {
            font-weight: 600;
            font-size: 18px;
            margin-bottom: 6px;
        }

        .plan-price {
            color: var(--primary);
            font-weight: 700;
            font-size: 20px;
            margin-bottom: 8px;
        }

        .plan-desc {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* 限时入口 */
        .flash-entry {
            background: var(--dark-bg);
            background-image: radial-gradient(circle at 20% 50%, rgba(255, 90, 31, 0.12), transparent 60%), radial-gradient(circle at 80% 50%, rgba(14, 217, 200, 0.08), transparent 50%), url('/assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            padding: 60px 0;
            color: #fff;
        }

        .flash-card {
            background: rgba(11, 18, 32, 0.7);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-lg);
            padding: 40px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
            backdrop-filter: blur(4px);
        }

        .flash-info {
            flex: 1;
            min-width: 240px;
        }

        .flash-tag {
            display: inline-block;
            background: var(--accent);
            color: var(--dark-bg);
            padding: 4px 14px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 12px;
        }

        .flash-info h2 {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .flash-info p {
            color: rgba(255, 255, 255, 0.75);
            font-size: 15px;
        }

        .countdown {
            display: flex;
            gap: 10px;
            align-items: center;
            font-size: 15px;
            color: rgba(255, 255, 255, 0.85);
            flex-wrap: wrap;
        }

        .countdown .time-part {
            background: rgba(255, 255, 255, 0.1);
            padding: 8px 14px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            color: #fff;
            letter-spacing: 0.05em;
        }

        /* 最新信息 */
        .latest-info {
            background: var(--card-bg);
        }

        .search-box {
            display: flex;
            align-items: center;
            gap: 8px;
            background: var(--light-bg);
            border: 1px solid var(--border);
            border-radius: 999px;
            padding: 6px 8px 6px 16px;
            min-width: 260px;
            transition: all var(--transition);
        }

        .search-box:focus-within {
            border-color: rgba(255, 90, 31, 0.4);
            box-shadow: 0 0 0 3px rgba(255, 90, 31, 0.08);
        }

        .search-box input {
            border: none;
            background: transparent;
            outline: none;
            width: 100%;
            font-size: 14px;
            color: var(--text-main);
        }

        .search-box button {
            background: var(--primary);
            border: none;
            border-radius: 50%;
            width: 34px;
            height: 34px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: background var(--transition);
        }

        .search-box button:hover {
            background: var(--primary-dark);
        }

        .search-box button svg {
            width: 16px;
            height: 16px;
            stroke: #fff;
            fill: none;
            stroke-width: 2;
            stroke-linecap: round;
        }

        .info-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            height: 100%;
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }

        .info-card:hover {
            border-color: rgba(255, 90, 31, 0.25);
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }

        .info-card .card-img {
            height: 160px;
            overflow: hidden;
            position: relative;
        }

        .info-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.3s ease;
        }

        .info-card:hover .card-img img {
            transform: scale(1.04);
        }

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

        .info-body h3 {
            font-size: 17px;
            font-weight: 600;
            line-height: 1.5;
            margin-bottom: 10px;
        }

        .info-body h3 a {
            color: var(--text-main);
        }

        .info-body h3 a:hover {
            color: var(--primary);
        }

        .info-body p {
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 16px;
            flex: 1;
        }

        .info-meta {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-top: auto;
        }

        .info-meta .tag {
            background: rgba(14, 217, 200, 0.12);
            color: var(--accent-dark);
            padding: 3px 10px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 500;
        }

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

        .empty-state {
            text-align: center;
            padding: 60px 20px;
            color: var(--text-muted);
            background: var(--light-bg);
            border-radius: var(--radius-md);
            font-size: 15px;
        }

        /* FAQ */
        .faq-section {
            background: var(--light-bg);
        }

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

        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            overflow: hidden;
            transition: box-shadow var(--transition);
        }

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

        .faq-question {
            display: flex;
            align-items: center;
            gap: 14px;
            width: 100%;
            padding: 18px 20px;
            background: transparent;
            border: none;
            text-align: left;
            font-weight: 500;
            font-size: 15px;
            cursor: pointer;
            color: var(--text-main);
        }

        .faq-question .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(14, 217, 200, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            color: var(--accent-dark);
            font-weight: 700;
        }

        .faq-question::after {
            content: '+';
            margin-left: auto;
            font-size: 20px;
            color: var(--text-muted);
            transition: transform var(--transition);
        }

        .faq-question.open::after {
            content: '−';
            transform: rotate(180deg);
        }

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

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

        .faq-answer-inner {
            padding: 0 20px 18px 62px;
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.9;
            border-left: 4px solid var(--accent);
            margin-left: 44px;
        }

        /* 咨询表单 */
        .contact-section {
            background: var(--card-bg);
        }

        .contact-card {
            background: var(--light-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 36px;
            height: 100%;
        }

        .contact-card h3 {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 24px;
        }

        .form-label {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-main);
            margin-bottom: 6px;
        }

        .form-control {
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 10px 14px;
            font-size: 15px;
            background: var(--card-bg);
            transition: all var(--transition);
        }

        .form-control:focus {
            border-color: rgba(255, 90, 31, 0.6);
            box-shadow: 0 0 0 3px rgba(255, 90, 31, 0.12);
            outline: none;
        }

        textarea.form-control {
            min-height: 100px;
            resize: vertical;
        }

        .contact-aside {
            display: flex;
            flex-direction: column;
            justify-content: center;
            height: 100%;
            padding: 20px 0 20px 40px;
        }

        .contact-aside h3 {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .contact-aside p {
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.9;
            margin-bottom: 24px;
        }

        .contact-aside img {
            border-radius: var(--radius-md);
            margin-top: 12px;
        }

        .contact-info-item {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 12px;
            color: var(--text-main);
            font-size: 15px;
        }

        .contact-info-item svg {
            width: 18px;
            height: 18px;
            stroke: var(--primary);
            fill: none;
            stroke-width: 2;
            stroke-linecap: round;
            stroke-linejoin: round;
        }

        /* 页脚 */
        .site-footer {
            background: var(--dark-bg);
            color: rgba(255, 255, 255, 0.75);
            padding: 60px 0 0;
        }

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

        .footer-brand .brand-main {
            font-size: 24px;
        }

        .footer-brand .brand-sub {
            color: rgba(255, 255, 255, 0.5);
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.9;
            color: rgba(255, 255, 255, 0.55);
            margin-top: 14px;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 18px;
        }

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

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

        .footer-col ul a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
            transition: all var(--transition);
        }

        .footer-col ul a:hover {
            color: var(--accent);
            text-decoration: underline;
            text-underline-offset: 4px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 20px 0;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 8px;
        }

        /* 响应式 */
        @media (max-width: 991.98px) {
            .nav-links {
                display: none;
            }

            .nav-cta {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .hero {
                padding: 60px 0;
            }

            .hero h1 {
                font-size: 2rem;
            }

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

            .trust-bar {
                margin-top: -20px;
            }

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

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
        }

        @media (max-width: 767.98px) {
            .section-padding {
                padding: 48px 0;
            }

            .section-title {
                font-size: 1.4rem;
            }

            .hero h1 {
                font-size: 1.7rem;
            }

            .hero-actions .btn {
                width: 100%;
            }

            .trust-list {
                grid-template-columns: 1fr 1fr;
            }

            .flash-card {
                flex-direction: column;
                padding: 28px;
                text-align: center;
            }

            .countdown {
                justify-content: center;
            }

            .contact-aside {
                padding-left: 0;
                padding-top: 30px;
            }

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

            .search-box {
                width: 100%;
            }

            .section-head {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        @media (max-width: 575.98px) {
            .container {
                padding-left: 14px;
                padding-right: 14px;
            }

            .nav-panel {
                padding: 10px 14px;
            }

            .brand-main {
                font-size: 20px;
            }

            .brand-sub {
                font-size: 11px;
            }

            .hero {
                padding: 40px 0 60px;
            }

            .hero h1 {
                font-size: 1.45rem;
            }

            .trust-item {
                font-size: 13px;
            }

            .promo-step {
                padding: 24px 18px;
            }

            .table-wrapper td,
            .table-wrapper th {
                padding: 14px 12px;
            }
        }

/* roulang page: category1 */
:root {
  --primary: #FF5A1F;
  --primary-dark: #e04a12;
  --primary-light: rgba(255, 90, 31, 0.1);
  --secondary: #0ED9C8;
  --dark-bg: #0B1220;
  --dark-bg-light: #101b2e;
  --light-bg: #F4F6F9;
  --text-main: #1B2633;
  --text-secondary: #5A6B7C;
  --text-white: #F2F5F9;
  --border-color: #E4EAF1;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --radius-pill: 999px;
  --shadow-card: 0 4px 16px rgba(0, 0, 0, 0.06);
  --shadow-hover: 0 8px 24px rgba(255, 90, 31, 0.15);
  --transition: all 0.25s ease;
  --container-w: 1200px;
}

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

body {
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
  background: var(--light-bg);
  color: var(--text-main);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; color: inherit; transition: var(--transition); }
img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-md); }
button { font-family: inherit; }
input { font-family: inherit; }
ul { list-style: none; }

.container { max-width: var(--container-w); padding-left: 16px; padding-right: 16px; margin: 0 auto; }
@media (min-width: 768px) {
  .container { padding-left: 24px; padding-right: 24px; }
}

/* ========== 顶部导航 ========== */
.site-header {
  background: var(--light-bg);
  padding: 16px 0 8px;
  position: relative;
  z-index: 100;
}

.nav-panel {
  display: flex;
  align-items: center;
  gap: 24px;
  background: #ffffff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  padding: 12px 20px;
  box-shadow: var(--shadow-card);
  flex-wrap: wrap;
}

.brand-logo {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
  padding: 4px 0;
}

.brand-main {
  font-size: 22px;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: 1px;
}

.brand-sub {
  font-size: 11px;
  color: var(--text-secondary);
  letter-spacing: 2px;
  white-space: nowrap;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  background: transparent;
  border: 1px solid transparent;
  transition: var(--transition);
  white-space: nowrap;
}

.nav-link svg { flex-shrink: 0; opacity: 0.7; }

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

.nav-link.active {
  background: var(--primary-light);
  color: var(--primary);
  border-color: rgba(255, 90, 31, 0.2);
  font-weight: 600;
}

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

.nav-cta {
  white-space: nowrap;
  border-radius: var(--radius-sm);
  font-weight: 600;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: transparent;
  border: none;
  padding: 10px;
  cursor: pointer;
  border-radius: 8px;
}

.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--text-main);
  border-radius: 2px;
  transition: var(--transition);
}

.nav-toggle:hover span { background: var(--primary); }
.nav-toggle:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }

@media (max-width: 991px) {
  .nav-links {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
    padding-top: 8px;
  }
  .nav-links.open { display: flex; }
  .nav-actions { margin-left: auto; }
  .nav-toggle { display: flex; }
  .nav-panel { gap: 12px; }
}

/* ========== 面包屑 ========== */
.breadcrumb-custom {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 24px;
}

.breadcrumb-custom a { color: rgba(255, 255, 255, 0.6); }
.breadcrumb-custom a:hover { color: var(--secondary); }
.breadcrumb-custom .sep { opacity: 0.5; }
.breadcrumb-custom .current { color: var(--secondary); }

/* ========== Hero ========== */
.cat-hero {
  position: relative;
  background-image: url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center;
  background-color: var(--dark-bg);
  padding: 64px 0 80px;
  overflow: hidden;
}

.cat-hero::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: linear-gradient(135deg, rgba(11, 18, 32, 0.92) 0%, rgba(11, 18, 32, 0.78) 50%, rgba(11, 18, 32, 0.65) 100%);
}

.cat-hero::after {
  content: '';
  position: absolute;
  top: -60px; right: -60px;
  width: 300px; height: 300px;
  background: radial-gradient(circle, rgba(255, 90, 31, 0.18) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

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

.hero-box { text-align: center; max-width: 780px; margin: 0 auto; padding: 20px 0; }

.hero-box h1 {
  font-size: 40px;
  font-weight: 800;
  color: var(--text-white);
  line-height: 1.35;
  margin-bottom: 16px;
  letter-spacing: 1px;
}

.hero-box h1 .highlight {
  color: var(--primary);
  position: relative;
  display: inline-block;
}

.hero-box h1 .highlight::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 0;
  width: 100%;
  height: 4px;
  border-radius: 2px;
  background: var(--primary);
  opacity: 0.6;
}

.hero-box .hero-sub {
  color: rgba(255, 255, 255, 0.85);
  font-size: 17px;
  line-height: 1.8;
  margin-bottom: 28px;
}

.hero-search {
  display: flex;
  max-width: 460px;
  margin: 0 auto 28px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 999px;
  padding: 6px 6px 6px 20px;
  backdrop-filter: blur(6px);
  align-items: center;
}

.hero-search input {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text-white);
  font-size: 14px;
  outline: none;
  min-width: 0;
}

.hero-search input::placeholder { color: rgba(255, 255, 255, 0.5); }

.hero-search button {
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 999px;
  padding: 8px 20px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

.hero-search button:hover { background: var(--primary-dark); }
.hero-search button:focus-visible { outline: 2px solid var(--secondary); outline-offset: 2px; }

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  border: none;
  transition: var(--transition);
  padding: 10px 24px;
  cursor: pointer;
}

.btn:focus-visible { outline: 2px solid var(--secondary); outline-offset: 2px; }

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

.btn-primary:hover {
  background: var(--primary-dark);
  transform: scale(1.02);
  box-shadow: 0 6px 20px rgba(255, 90, 31, 0.35);
}

.btn-outline-light {
  background: transparent;
  border: 1.5px solid rgba(255, 255, 255, 0.6);
  color: var(--text-white);
}

.btn-outline-light:hover {
  background: rgba(255, 90, 31, 0.15);
  border-color: var(--primary);
  color: var(--text-white);
}

.btn-lg { padding: 14px 32px; font-size: 16px; border-radius: 10px; }
.btn-sm { padding: 8px 16px; font-size: 14px; border-radius: 6px; }

.hero-trust {
  display: flex;
  justify-content: center;
  gap: 28px;
  flex-wrap: wrap;
  margin-top: 36px;
}

.hero-trust span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: rgba(255, 255, 255, 0.6);
  font-size: 13px;
}

.hero-trust svg { width: 16px; height: 16px; color: var(--secondary); flex-shrink: 0; }

@media (max-width: 767px) {
  .cat-hero { padding: 44px 0 56px; }
  .hero-box h1 { font-size: 32px; }
  .hero-box .hero-sub { font-size: 15px; }
  .hero-actions { flex-direction: column; align-items: center; }
  .hero-actions .btn { width: 100%; justify-content: center; }
}

/* ========== 板块通用 ========== */
.section { padding: 72px 0; }

.section-head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 48px;
}

.section-head .section-tag {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: var(--radius-pill);
  padding: 4px 14px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 12px;
}

.section-head h2 {
  font-size: 28px;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 12px;
  line-height: 1.4;
}

.section-head p {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.8;
}

@media (max-width: 767px) {
  .section { padding: 48px 0; }
  .section-head { margin-bottom: 32px; }
  .section-head h2 { font-size: 24px; }
}

/* ========== 标签云 ========== */
.tag-section { background: var(--light-bg); padding-top: 56px; padding-bottom: 0; }

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  background: #ffffff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  padding: 28px 32px;
  box-shadow: var(--shadow-card);
}

.tag-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border-radius: var(--radius-pill);
  background: var(--light-bg);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  transition: var(--transition);
}

.tag-pill:hover {
  background: var(--primary-light);
  border-color: rgba(255, 90, 31, 0.3);
  color: var(--primary);
  transform: translateY(-2px);
}

.tag-pill .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--secondary);
}

@media (max-width: 767px) {
  .tag-cloud { padding: 20px; }
  .tag-pill { font-size: 13px; padding: 6px 14px; }
}

/* ========== 功能卖点 ========== */
.feature-section { background: #ffffff; }

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

.feature-card {
  background: var(--light-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  transition: var(--transition);
  position: relative;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 24px;
  width: 32px;
  height: 4px;
  border-radius: 0 0 4px 4px;
  background: var(--primary);
  opacity: 0;
  transition: var(--transition);
}

.feature-card:hover {
  border-color: rgba(255, 90, 31, 0.2);
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}

.feature-card:hover::before { opacity: 1; }

.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  color: var(--primary);
}

.feature-icon svg { width: 26px; height: 26px; }

.feature-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
}

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

@media (max-width: 991px) {
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 575px) {
  .feature-grid { grid-template-columns: 1fr; }
}

/* ========== 适用场景 ========== */
.scenario-section { background: var(--light-bg); }

.scenario-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.scenario-img {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  position: relative;
}

.scenario-img img { width: 100%; aspect-ratio: 4/3; object-fit: cover; }

.scenario-img .img-caption {
  position: absolute;
  bottom: 0;
  left: 0; right: 0;
  padding: 32px 20px 16px;
  background: linear-gradient(transparent, rgba(11, 18, 32, 0.8));
  color: var(--text-white);
  font-size: 13px;
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

.scenario-list { display: flex; flex-direction: column; gap: 16px; }

.scenario-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  transition: var(--transition);
}

.scenario-item:hover {
  box-shadow: var(--shadow-hover);
  border-color: rgba(255, 90, 31, 0.2);
  transform: translateX(4px);
}

.scenario-num {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 800;
  flex-shrink: 0;
  font-style: italic;
}

.scenario-item h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 4px;
}

.scenario-item p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

@media (max-width: 991px) {
  .scenario-wrap { grid-template-columns: 1fr; gap: 32px; }
}

/* ========== 登录流程 ========== */
.workflow-section {
  background: var(--dark-bg);
  background-image: url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center;
  position: relative;
}

.workflow-section::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(11, 18, 32, 0.9);
}

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

.workflow-section .section-head h2 { color: var(--text-white); }
.workflow-section .section-head p { color: rgba(255, 255, 255, 0.7); }
.workflow-section .section-head .section-tag { background: rgba(255, 90, 31, 0.2); color: var(--primary); }

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

.step-item {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-md);
  padding: 24px;
  position: relative;
  transition: var(--transition);
}

.step-item:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 90, 31, 0.4);
  transform: translateY(-4px);
}

.step-num {
  font-size: 48px;
  font-weight: 800;
  color: rgba(255, 90, 31, 0.4);
  line-height: 1;
  margin-bottom: 16px;
  font-style: italic;
}

.step-item h3 {
  color: var(--text-white);
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}

.step-item p {
  color: rgba(255, 255, 255, 0.65);
  font-size: 14px;
  line-height: 1.6;
}

.step-arrow {
  position: absolute;
  right: -18px;
  top: 50%;
  color: var(--secondary);
  opacity: 0.5;
  font-size: 18px;
  z-index: 3;
}

@media (max-width: 991px) {
  .steps-wrap { grid-template-columns: repeat(2, 1fr); }
  .step-arrow { display: none; }
}

@media (max-width: 575px) {
  .steps-wrap { grid-template-columns: 1fr; }
}

/* ========== 内容专题卡 ========== */
.info-card-section { background: #ffffff; }

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

.info-card {
  background: var(--light-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.info-card:hover {
  box-shadow: var(--shadow-hover);
  border-color: rgba(255, 90, 31, 0.2);
  transform: translateY(-6px);
}

.info-card .card-thumb {
  overflow: hidden;
  position: relative;
  aspect-ratio: 16/9;
}

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

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

.info-card .card-tag {
  position: absolute;
  top: 12px;
  left: 12px;
  background: var(--primary);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 3px 12px;
  border-radius: var(--radius-pill);
  z-index: 2;
}

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

.info-card-body h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
  line-height: 1.5;
}

.info-card-body p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  flex: 1;
  margin-bottom: 12px;
}

.info-card-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--primary);
  font-size: 14px;
  font-weight: 600;
  transition: var(--transition);
}

.info-card-link:hover .arrow-icon { transform: translateX(4px); }

.info-card-link .arrow-icon {
  transition: transform 0.2s ease;
}

@media (max-width: 991px) {
  .info-card-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 575px) {
  .info-card-grid { grid-template-columns: 1fr; }
}

/* ========== FAQ ========== */
.faq-section { background: var(--light-bg); }

.faq-wrap {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
}

.faq-item.open {
  border-color: rgba(14, 217, 200, 0.4);
  box-shadow: 0 4px 20px rgba(14, 217, 200, 0.08);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 14px;
  background: transparent;
  border: none;
  padding: 18px 20px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-main);
  text-align: left;
  cursor: pointer;
  transition: var(--transition);
}

.faq-question:hover { color: var(--primary); }
.faq-question:focus-visible { outline: 2px solid var(--primary); outline-offset: -2px; border-radius: var(--radius-md); }

.faq-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--secondary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 800;
  flex-shrink: 0;
}

.faq-toggle {
  margin-left: auto;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--light-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--text-secondary);
  transition: var(--transition);
  flex-shrink: 0;
}

.faq-item.open .faq-toggle {
  transform: rotate(45deg);
  background: var(--primary-light);
  color: var(--primary);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  border-top: 1px solid transparent;
}

.faq-item.open .faq-answer {
  max-height: 300px;
  border-top-color: var(--border-color);
}

.faq-answer-inner {
  padding: 0 20px 18px 62px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
}

.faq-answer-inner p { margin-bottom: 8px; }
.faq-answer-inner p:last-child { margin-bottom: 0; }

/* ========== CTA ========== */
.cta-section {
  padding: 0;
}

.cta-band {
  position: relative;
  background-image: url('/assets/images/backpic/back-3.webp');
  background-size: cover;
  background-position: center;
  padding: 72px 0;
  text-align: center;
}

.cta-band::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: linear-gradient(120deg, rgba(11, 18, 32, 0.94), rgba(11, 18, 32, 0.82));
}

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

.cta-band h2 {
  color: var(--text-white);
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 14px;
}

.cta-band p {
  color: rgba(255, 255, 255, 0.75);
  font-size: 16px;
  max-width: 520px;
  margin: 0 auto 32px;
  line-height: 1.8;
}

.cta-band .btn-group {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.cta-band .trust-line {
  margin-top: 32px;
  display: flex;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
}

.cta-band .trust-line span {
  color: rgba(255, 255, 255, 0.5);
  font-size: 13px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.cta-band .trust-line svg { width: 14px; height: 14px; color: var(--secondary); }

@media (max-width: 767px) {
  .cta-band { padding: 48px 0; }
  .cta-band h2 { font-size: 24px; }
}

/* ========== 页脚 ========== */
.site-footer {
  background: var(--dark-bg);
  color: rgba(255, 255, 255, 0.7);
  padding: 56px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 40px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.55);
  margin-top: 12px;
}

.footer-col h4 {
  color: var(--text-white);
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 16px;
}

.footer-col ul li {
  margin-bottom: 10px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.55);
}

.footer-col a {
  color: rgba(255, 255, 255, 0.55);
}

.footer-col a:hover {
  color: var(--secondary);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-thickness: 2px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.35);
  flex-wrap: wrap;
  gap: 8px;
}

@media (max-width: 991px) {
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 575px) {
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

/* ========== 通用状态 ========== */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.section-divider {
  border: none;
  border-top: 1px solid var(--border-color);
  margin: 0;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition: none !important;
    animation: none !important;
  }
}

/* roulang page: article */
/* ===== 设计变量 ===== */
:root {
    --primary: #FF5A1F;
    --primary-dark: #D94A16;
    --primary-light: rgba(255, 90, 31, 0.10);
    --accent: #0ED9C8;
    --accent-light: rgba(14, 217, 200, 0.10);
    --bg-dark: #0B1220;
    --bg-light: #F4F6F9;
    --surface: #FFFFFF;
    --text-main: #1B2633;
    --text-secondary: #5A6B7C;
    --text-muted: #8A9AAB;
    --text-light: #F2F5F9;
    --border: #E4EAF1;
    --radius-lg: 16px;
    --radius-md: 12px;
    --radius-sm: 8px;
    --radius-pill: 999px;
    --shadow-card: 0 4px 16px rgba(0, 0, 0, 0.06);
    --shadow-hover: 0 8px 24px rgba(255, 90, 31, 0.15);
    --transition: 0.2s ease;
}

/* ===== reset / base ===== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    color: var(--text-main);
    background: var(--bg-light);
    line-height: 1.8;
    -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--primary); text-decoration: none; transition: color 0.2s ease; }
a:hover { color: var(--primary-dark); }
h1, h2, h3, h4, h5, h6 { line-height: 1.45; margin: 0; font-weight: 700; }
p { margin: 0; }
button { font-family: inherit; cursor: pointer; }
input, textarea, select { font-family: inherit; }
.container { max-width: 1200px; padding-left: 24px; padding-right: 24px; }

/* ===== 按钮 ===== */
.btn {
    border-radius: var(--radius-sm);
    font-size: 0.9375rem;
    font-weight: 500;
    padding: 10px 22px;
    transition: all 0.2s ease;
}
.btn-primary {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}
.btn-primary:hover, .btn-primary:focus {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    color: #fff;
    transform: scale(1.02);
}
.btn-outline-primary {
    color: var(--primary);
    border-color: var(--primary);
}
.btn-outline-primary:hover, .btn-outline-primary:focus {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}
.btn-outline-light {
    color: #fff;
    border-color: rgba(255, 255, 255, 0.6);
}
.btn-outline-light:hover, .btn-outline-light:focus {
    background: rgba(255, 90, 31, 0.15);
    border-color: var(--primary);
    color: #fff;
}
.btn-sm { padding: 8px 14px; font-size: 14px; }
.btn-lg { padding: 14px 36px; font-size: 1rem; border-radius: 10px; }
.btn:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }

/* ===== header / nav ===== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 16px 0;
    background: rgba(244, 246, 249, 0.92);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid rgba(228, 234, 241, 0.7);
}
.nav-panel {
    display: flex;
    align-items: center;
    gap: 20px;
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: 12px 20px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
    border: 1px solid var(--border);
    position: relative;
}
.brand-logo {
    display: inline-flex;
    flex-direction: column;
    line-height: 1.2;
    text-decoration: none;
    flex-shrink: 0;
}
.brand-main {
    font-size: 22px;
    font-weight: 800;
    color: var(--primary);
    letter-spacing: 0.02em;
}
.brand-sub {
    font-size: 11px;
    color: var(--text-secondary);
    letter-spacing: 0.04em;
    white-space: nowrap;
}
.nav-links {
    display: flex;
    gap: 8px;
    flex: 1;
    margin-left: 8px;
    flex-wrap: wrap;
}
.nav-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: 10px;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    background: var(--bg-light);
    border: 1px solid transparent;
    transition: all 0.2s ease;
    white-space: nowrap;
}
.nav-link:hover, .nav-link:focus-visible {
    color: var(--primary);
    background: var(--primary-light);
    border-color: rgba(255, 90, 31, 0.15);
    outline: none;
}
.nav-link.active {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}
.nav-link svg { flex-shrink: 0; }
.nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-left: auto;
}
.nav-cta { white-space: nowrap; }
.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 42px;
    height: 42px;
    padding: 10px;
    background: var(--bg-light);
    border: 1px solid var(--border);
    border-radius: 8px;
    transition: all 0.2s ease;
}
.nav-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    border-radius: 2px;
    background: var(--text-main);
    transition: all 0.25s ease;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.nav-toggle:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }

/* ===== 文章 Hero 区 ===== */
.article-hero {
    position: relative;
    background-image: linear-gradient(rgba(11, 18, 32, 0.88), rgba(11, 18, 32, 0.92)), url('/assets/images/backpic/back-1.webp');
    background-size: cover;
    background-position: center;
    padding: 72px 0 64px;
    color: var(--text-light);
}
.breadcrumb-nav {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    font-size: 13px;
    color: rgba(242, 245, 249, 0.7);
    margin-bottom: 28px;
}
.breadcrumb-nav .crumb {
    color: rgba(242, 245, 249, 0.7);
    text-decoration: none;
    transition: color 0.2s;
}
.breadcrumb-nav .crumb:hover { color: var(--accent); }
.breadcrumb-nav .crumb.current {
    color: var(--text-light);
    max-width: 320px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.breadcrumb-nav .crumb-sep { opacity: 0.5; }
.article-hero h1 {
    font-size: 2.5rem;
    line-height: 1.4;
    max-width: 880px;
    margin-bottom: 20px;
    letter-spacing: 0.01em;
    word-break: break-word;
}
.article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 12px 24px;
    margin-top: 8px;
}
.meta-item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    color: rgba(242, 245, 249, 0.75);
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: var(--radius-pill);
    padding: 4px 14px;
}
.meta-item .meta-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent);
    display: inline-block;
}

/* ===== 正文区 ===== */
.article-body-section {
    padding: 64px 0;
}
.article-card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-card);
    padding: 40px 44px;
}
.article-body {
    font-size: 16px;
    line-height: 2;
    color: var(--text-main);
}
.article-body p {
    margin: 0 0 18px;
    max-width: 720px;
}
.article-body h2 {
    font-size: 1.5rem;
    margin: 36px 0 16px;
    padding-left: 14px;
    border-left: 4px solid var(--primary);
    border-radius: 2px;
    line-height: 1.4;
}
.article-body h3 {
    font-size: 1.1875rem;
    margin: 28px 0 12px;
    color: var(--text-main);
}
.article-body h4 {
    font-size: 1rem;
    margin: 24px 0 10px;
    color: var(--text-secondary);
}
.article-body img {
    border-radius: var(--radius-md);
    margin: 24px 0;
    box-shadow: var(--shadow-card);
}
.article-body blockquote {
    border-left: 3px solid var(--accent);
    background: var(--accent-light);
    padding: 16px 22px;
    margin: 24px 0;
    border-radius: 0 12px 12px 0;
    color: var(--text-secondary);
    font-style: normal;
}
.article-body ul, .article-body ol {
    padding-left: 26px;
    margin: 16px 0 20px;
}
.article-body li { margin-bottom: 8px; }
.article-body a {
    color: var(--primary);
    border-bottom: 1px solid transparent;
}
.article-body a:hover { border-bottom-color: var(--primary); }
.article-body code {
    background: var(--bg-light);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 2px 7px;
    font-size: 14px;
    color: var(--primary-dark);
}
.article-body pre {
    background: var(--bg-dark);
    color: var(--text-light);
    border-radius: var(--radius-md);
    padding: 20px 24px;
    overflow-x: auto;
    margin: 24px 0;
    line-height: 1.7;
}
.article-body pre code { background: transparent; border: 0; color: inherit; padding: 0; }
.article-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 24px 0;
    font-size: 15px;
}
.article-body th, .article-body td {
    border: 1px solid var(--border);
    padding: 12px 16px;
    text-align: left;
}
.article-body th { background: var(--bg-light); font-weight: 600; }

/* 内容未找到 */
.article-not-found {
    text-align: center;
    padding: 60px 20px;
}
.not-found-icon {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background: var(--primary-light);
    color: var(--primary);
    font-size: 32px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
}
.article-not-found h3 {
    font-size: 1.5rem;
    margin-bottom: 12px;
}
.article-not-found p {
    color: var(--text-secondary);
    margin-bottom: 24px;
}

/* ===== 侧栏 ===== */
.article-sidebar { position: sticky; top: 100px; }
.sidebar-card {
    background: var(--surface);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-card);
    padding: 24px;
    margin-bottom: 24px;
    transition: box-shadow 0.25s ease, transform 0.25s ease;
}
.sidebar-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-2px); }
.sidebar-card h4 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.sidebar-card h4::before {
    content: "";
    width: 4px;
    height: 16px;
    border-radius: 2px;
    background: var(--primary);
    display: inline-block;
}
.search-box {
    display: flex;
    gap: 8px;
}
.search-box input {
    flex: 1;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 9px 14px;
    font-size: 14px;
    outline: none;
    transition: all 0.2s ease;
    background: var(--bg-light);
    color: var(--text-main);
}
.search-box input:focus {
    border-color: rgba(255, 90, 31, 0.6);
    box-shadow: 0 0 0 3px rgba(255, 90, 31, 0.12);
    background: #fff;
}
.search-box input::placeholder { color: var(--text-muted); }
.search-box button {
    border: none;
    background: var(--primary);
    color: #fff;
    border-radius: 8px;
    padding: 9px 16px;
    font-size: 14px;
    font-weight: 500;
    transition: background 0.2s ease;
}
.search-box button:hover { background: var(--primary-dark); }
.side-link {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
    color: var(--text-secondary);
    font-size: 14px;
    text-decoration: none;
    transition: all 0.2s ease;
}
.side-link:last-child { border-bottom: none; }
.side-link:hover { color: var(--primary); padding-left: 6px; }
.side-link .side-icon {
    width: 30px;
    height: 30px;
    border-radius: 8px;
    background: var(--bg-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 15px;
    flex-shrink: 0;
    transition: background 0.2s ease;
}
.side-link:hover .side-icon { background: var(--primary-light); }
.highlight-card {
    background: linear-gradient(135deg, rgba(255, 90, 31, 0.05), rgba(14, 217, 200, 0.04));
    border-color: rgba(255, 90, 31, 0.25);
}
.highlight-card p {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.8;
}

/* ===== 相关推荐 ===== */
.related-section {
    padding: 64px 0;
    background: var(--bg-light);
}
.section-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 36px;
    position: relative;
    padding-bottom: 14px;
}
.section-title::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 48px;
    height: 4px;
    border-radius: 4px;
    background: var(--primary);
}
.related-card {
    background: var(--surface);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-card);
    overflow: hidden;
    height: 100%;
    display: flex;
    flex-direction: column;
    transition: all 0.25s ease;
}
.related-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-4px);
    border-color: rgba(255, 90, 31, 0.25);
}
.related-img {
    width: 100%;
    height: 180px;
    object-fit: cover;
}
.related-body { padding: 20px 24px 24px; display: flex; flex-direction: column; flex: 1; }
.related-card h3 {
    font-size: 1.125rem;
    margin-bottom: 10px;
    line-height: 1.5;
}
.related-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 16px;
    flex: 1;
}
.card-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 14px;
    font-weight: 500;
    color: var(--primary);
    text-decoration: none;
    transition: gap 0.2s ease;
}
.card-link:hover { gap: 8px; color: var(--primary-dark); }

/* ===== CTA 区 ===== */
.cta-section {
    padding: 72px 0;
    background-image: linear-gradient(rgba(11, 18, 32, 0.9), rgba(11, 18, 32, 0.94)), url('/assets/images/backpic/back-2.png');
    background-size: cover;
    background-position: center;
    color: var(--text-light);
    text-align: center;
}
.cta-inner { max-width: 640px; margin: 0 auto; padding: 0 20px; }
.cta-inner h2 {
    font-size: 2rem;
    line-height: 1.4;
    margin-bottom: 16px;
}
.cta-inner p {
    font-size: 16px;
    color: rgba(242, 245, 249, 0.8);
    margin-bottom: 32px;
    line-height: 1.9;
}
.cta-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}
.cta-buttons .btn { min-width: 140px; }

/* ===== FAQ 区 ===== */
.faq-section {
    padding: 64px 0;
    background: var(--surface);
}
.faq-list {
    max-width: 860px;
    margin: 0 auto;
}
.faq-item {
    background: var(--bg-light);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    margin-bottom: 14px;
    overflow: hidden;
    transition: all 0.25s ease;
}
.faq-item:hover { border-color: rgba(255, 90, 31, 0.3); }
.faq-item[open] { border-color: rgba(255, 90, 31, 0.4); box-shadow: var(--shadow-card); }
.faq-question {
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    width: 100%;
    padding: 18px 22px;
    background: transparent;
    border: none;
    text-align: left;
    font-size: 16px;
    font-weight: 600;
    color: var(--text-main);
    transition: color 0.2s ease;
}
.faq-question::-webkit-details-marker { display: none; }
.faq-question:hover { color: var(--primary); }
.faq-icon {
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background: var(--accent-light);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 600;
    flex-shrink: 0;
    transition: transform 0.25s ease, background 0.25s ease;
}
.faq-item[open] .faq-icon {
    transform: rotate(45deg);
    background: var(--primary-light);
    color: var(--primary);
}
.faq-answer {
    padding: 0 22px 20px;
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.9;
    border-left: 3px solid var(--accent);
    margin-left: 22px;
    border-radius: 0;
}
.faq-answer p { margin-bottom: 8px; }

/* ===== 页脚 ===== */
.site-footer {
    background: var(--bg-dark);
    color: rgba(242, 245, 249, 0.8);
    padding: 64px 0 0;
    font-size: 14px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.footer-brand p {
    margin-top: 16px;
    line-height: 1.9;
    color: rgba(242, 245, 249, 0.6);
    max-width: 320px;
}
.site-footer .brand-logo .brand-main { color: var(--primary); }
.site-footer .brand-logo .brand-sub { color: rgba(242, 245, 249, 0.6); }
.footer-col h4 {
    font-size: 15px;
    color: var(--text-light);
    margin-bottom: 18px;
    font-weight: 600;
}
.footer-col ul { list-style: none; padding: 0; margin: 0; }
.footer-col li { margin-bottom: 10px; }
.footer-col li a {
    color: rgba(242, 245, 249, 0.65);
    text-decoration: none;
    transition: all 0.2s ease;
    display: inline-block;
}
.footer-col li a:hover {
    color: var(--accent);
    text-decoration: underline;
    text-underline-offset: 4px;
}
.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    padding: 20px 0;
    color: rgba(242, 245, 249, 0.45);
    font-size: 13px;
}

/* ===== 响应式 ===== */
@media (max-width: 991.98px) {
    .nav-panel { flex-wrap: wrap; }
    .nav-links {
        display: none;
        position: absolute;
        top: calc(100% + 8px);
        left: 0;
        right: 0;
        background: var(--surface);
        border-radius: var(--radius-md);
        box-shadow: 0 12px 32px rgba(11, 18, 32, 0.12);
        padding: 16px;
        flex-direction: column;
        gap: 10px;
        margin-left: 0;
        border: 1px solid var(--border);
        z-index: 100;
    }
    .nav-links.open { display: flex; }
    .nav-link { width: 100%; justify-content: flex-start; }
    .nav-toggle { display: flex; }
    .article-hero { padding: 56px 0 48px; }
    .article-hero h1 { font-size: 2rem; }
    .article-card { padding: 28px 24px; }
    .article-sidebar { position: static; margin-top: 20px; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 767.98px) {
    .container { padding-left: 16px; padding-right: 16px; }
    .site-header { padding: 12px 0; }
    .nav-panel { padding: 10px 14px; gap: 12px; }
    .brand-sub { display: none; }
    .article-hero h1 { font-size: 1.625rem; }
    .article-card { padding: 20px 16px; border-radius: 12px; }
    .article-body { font-size: 15px; line-height: 1.9; }
    .related-section, .cta-section, .faq-section, .article-body-section { padding: 48px 0; }
    .section-title { font-size: 1.5rem; }
    .cta-inner h2 { font-size: 1.5rem; }
    .cta-buttons { flex-direction: column; align-items: center; }
    .cta-buttons .btn { width: 100%; max-width: 260px; }
    .footer-grid { grid-template-columns: 1fr; gap: 28px; }
    .footer-bottom { flex-direction: column; text-align: center; }
}
@media (max-width: 575.98px) {
    .meta-item { font-size: 13px; padding: 3px 10px; }
    .breadcrumb-nav { font-size: 12px; }
    .breadcrumb-nav .crumb.current { max-width: 180px; }
}