/* roulang page: index */
/* ===== CSS 设计变量 ===== */
        :root {
            --primary: #1a365d;
            --primary-light: #2a4a7f;
            --primary-dark: #0f1f3d;
            --secondary: #c9a84c;
            --secondary-light: #e0c66a;
            --secondary-dark: #a8882e;
            --bg: #f5f3f0;
            --bg-card: #ffffff;
            --bg-dark: #1a1a2e;
            --text: #1e293b;
            --text-light: #64748b;
            --text-white: #f8f7f4;
            --border: #e2ddd7;
            --radius: 14px;
            --radius-sm: 8px;
            --radius-lg: 24px;
            --shadow: 0 4px 24px rgba(26, 54, 93, 0.08);
            --shadow-hover: 0 12px 40px rgba(26, 54, 93, 0.16);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --max-width: 1200px;
            --header-h: 72px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

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

        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--secondary);
        }
        a:focus-visible {
            outline: 2px solid var(--secondary);
            outline-offset: 2px;
            border-radius: 4px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            transition: all var(--transition);
        }

        button {
            cursor: pointer;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--primary-dark);
        }

        /* ===== 容器 ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        .container--narrow {
            max-width: 880px;
        }

        .container--wide {
            max-width: 1360px;
        }

        /* ===== 分隔 & 间距 ===== */
        .section {
            padding: 80px 0;
        }

        .section--dark {
            background: var(--bg-dark);
            color: var(--text-white);
        }
        .section--dark h2,
        .section--dark h3,
        .section--dark .section__title {
            color: #fff;
        }

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

        .section__header {
            text-align: center;
            margin-bottom: 56px;
        }

        .section__title {
            font-size: 2.125rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 12px;
            position: relative;
        }

        .section__title::after {
            content: '';
            display: block;
            width: 48px;
            height: 4px;
            background: var(--secondary);
            border-radius: 4px;
            margin: 16px auto 0;
        }

        .section__subtitle {
            font-size: 1.05rem;
            color: var(--text-light);
            max-width: 640px;
            margin: 0 auto;
            line-height: 1.8;
        }

        .section--dark .section__subtitle {
            color: rgba(255, 255, 255, 0.75);
        }

        /* ===== Header & Nav ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-h);
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border);
            transition: all var(--transition);
        }

        .header__inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .header__logo {
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--primary-dark);
            letter-spacing: -0.01em;
            white-space: nowrap;
            transition: color var(--transition);
            flex-shrink: 0;
        }

        .header__logo:hover {
            color: var(--secondary);
        }

        .header__logo span {
            color: var(--secondary);
        }

        .header__nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .header__nav--left {
            flex: 1;
            justify-content: flex-start;
        }

        .header__nav--right {
            flex: 1;
            justify-content: flex-end;
        }

        .header__nav a {
            padding: 8px 18px;
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text);
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            position: relative;
        }

        .header__nav a:hover {
            color: var(--primary);
            background: rgba(26, 54, 93, 0.06);
        }

        .header__nav a.active {
            color: var(--primary);
            background: rgba(26, 54, 93, 0.08);
            font-weight: 600;
        }

        .header__nav a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--secondary);
            border-radius: 3px;
        }

        /* 汉堡菜单按钮 */
        .header__toggle {
            display: none;
            background: none;
            font-size: 1.5rem;
            color: var(--text);
            padding: 4px 8px;
            border-radius: var(--radius-sm);
        }

        .header__toggle:hover {
            background: rgba(26, 54, 93, 0.06);
        }

        /* ===== Hero ===== */
        .hero {
            padding: 160px 0 100px;
            background: var(--primary-dark);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            position: relative;
            overflow: hidden;
            min-height: 80vh;
            display: flex;
            align-items: center;
        }

        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 31, 61, 0.88) 0%, rgba(26, 54, 93, 0.76) 100%);
            z-index: 1;
        }

        .hero::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            right: 0;
            height: 120px;
            background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1440 120'%3E%3Cpath fill='%23f5f3f0' d='M0,64L48,74.7C96,85,192,107,288,106.7C384,107,480,85,576,74.7C672,64,768,64,864,74.7C960,85,1056,107,1152,112C1248,117,1344,107,1392,101.3L1440,96L1440,120L1392,120C1344,120,1248,120,1152,120C1056,120,960,120,864,120C768,120,672,120,576,120C480,120,384,120,288,120C192,120,96,120,48,120L0,120Z'/%3E%3C/svg%3E") no-repeat bottom / 100% 120px;
            z-index: 2;
            pointer-events: none;
        }

        .hero__content {
            position: relative;
            z-index: 3;
            text-align: center;
            max-width: 800px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .hero__badge {
            display: inline-block;
            background: rgba(201, 168, 76, 0.2);
            color: var(--secondary-light);
            font-size: 0.85rem;
            font-weight: 600;
            padding: 6px 20px;
            border-radius: 50px;
            border: 1px solid rgba(201, 168, 76, 0.3);
            margin-bottom: 28px;
            letter-spacing: 0.3px;
        }

        .hero__title {
            font-size: 3.25rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.03em;
            line-height: 1.15;
            margin-bottom: 20px;
        }

        .hero__title span {
            color: var(--secondary-light);
        }

        .hero__desc {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.8);
            max-width: 600px;
            margin: 0 auto 36px;
            line-height: 1.8;
        }

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

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            font-size: 1rem;
            font-weight: 600;
            border-radius: 50px;
            transition: all var(--transition);
            border: 2px solid transparent;
            letter-spacing: 0.2px;
        }

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

        .btn--primary:hover {
            background: var(--secondary-light);
            border-color: var(--secondary-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(201, 168, 76, 0.35);
            color: var(--primary-dark);
        }

        .btn--outline {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, 0.4);
        }

        .btn--outline:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: rgba(255, 255, 255, 0.7);
            transform: translateY(-2px);
            color: #fff;
        }

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

        .btn--secondary:hover {
            background: var(--primary-light);
            border-color: var(--primary-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(26, 54, 93, 0.25);
            color: #fff;
        }

        .btn--sm {
            padding: 10px 22px;
            font-size: 0.88rem;
        }

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

        /* ===== Cards ===== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: all var(--transition);
        }

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

        .card__image {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            border-radius: var(--radius) var(--radius) 0 0;
            display: block;
        }

        .card__body {
            padding: 24px;
        }

        .card__tag {
            display: inline-block;
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--secondary-dark);
            background: rgba(201, 168, 76, 0.12);
            padding: 4px 14px;
            border-radius: 50px;
            margin-bottom: 12px;
        }

        .card__title {
            font-size: 1.125rem;
            font-weight: 700;
            color: var(--primary-dark);
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .card__text {
            font-size: 0.92rem;
            color: var(--text-light);
            line-height: 1.7;
        }

        .card__meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.82rem;
            color: var(--text-light);
            margin-top: 16px;
            padding-top: 16px;
            border-top: 1px solid var(--border);
        }

        /* ===== 网格 ===== */
        .grid {
            display: grid;
            gap: 28px;
        }

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

        .grid--3 {
            grid-template-columns: repeat(3, 1fr);
        }

        .grid--4 {
            grid-template-columns: repeat(4, 1fr);
        }

        /* ===== 分类入口 ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .category-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 24px;
            text-align: center;
            box-shadow: var(--shadow);
            transition: all var(--transition);
            border: 1px solid var(--border);
            cursor: pointer;
        }

        .category-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-6px);
            border-color: var(--secondary);
        }

        .category-card__icon {
            font-size: 2.5rem;
            color: var(--secondary);
            margin-bottom: 16px;
            display: block;
        }

        .category-card__title {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--primary-dark);
            margin-bottom: 8px;
        }

        .category-card__count {
            font-size: 0.85rem;
            color: var(--text-light);
        }

        /* ===== 统计数字 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            text-align: center;
        }

        .stat-item__number {
            font-size: 2.75rem;
            font-weight: 800;
            color: var(--secondary);
            line-height: 1.2;
            letter-spacing: -0.02em;
        }

        .stat-item__label {
            font-size: 0.95rem;
            color: var(--text-light);
            margin-top: 6px;
        }

        .section--dark .stat-item__label {
            color: rgba(255, 255, 255, 0.7);
        }

        /* ===== 流程步骤 ===== */
        .steps {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
            counter-reset: step;
        }

        .step-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 36px 28px;
            box-shadow: var(--shadow);
            text-align: center;
            position: relative;
            transition: all var(--transition);
        }

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

        .step-card__num {
            font-size: 2rem;
            font-weight: 800;
            color: var(--secondary);
            background: rgba(201, 168, 76, 0.1);
            width: 56px;
            height: 56px;
            line-height: 56px;
            border-radius: 50%;
            display: inline-block;
            margin-bottom: 16px;
        }

        .step-card__title {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--primary-dark);
            margin-bottom: 8px;
        }

        .step-card__text {
            font-size: 0.92rem;
            color: var(--text-light);
            line-height: 1.7;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: all var(--transition);
        }

        .faq-item:hover {
            border-color: var(--secondary);
        }

        .faq-item__question {
            padding: 18px 24px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            background: none;
            width: 100%;
            text-align: left;
        }

        .faq-item__question i {
            font-size: 1.1rem;
            color: var(--secondary);
            transition: transform var(--transition);
            flex-shrink: 0;
        }

        .faq-item.active .faq-item__question i {
            transform: rotate(180deg);
        }

        .faq-item__answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
        }

        .faq-item.active .faq-item__answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        .faq-item__answer p {
            font-size: 0.95rem;
            color: var(--text-light);
            line-height: 1.8;
        }

        /* ===== CTA ===== */
        .cta {
            background: var(--primary-dark);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            padding: 80px 0;
            text-align: center;
            position: relative;
        }

        .cta::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(15, 31, 61, 0.85);
        }

        .cta__content {
            position: relative;
            z-index: 2;
            max-width: 640px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .cta__title {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
        }

        .cta__text {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 32px;
            line-height: 1.8;
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 48px 0 32px;
        }

        .footer__inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
        }

        .footer__brand {
            font-size: 1.2rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
        }

        .footer__brand span {
            color: var(--secondary);
        }

        .footer__desc {
            font-size: 0.9rem;
            line-height: 1.8;
            max-width: 320px;
        }

        .footer__heading {
            font-size: 0.95rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }

        .footer__links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer__links a {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.6);
            transition: color var(--transition);
        }

        .footer__links a:hover {
            color: var(--secondary);
        }

        .footer__bottom {
            max-width: var(--max-width);
            margin: 32px auto 0;
            padding: 20px 24px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
        }

        /* ===== 最新资讯列表 ===== */
        .news-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

        .news-item {
            display: flex;
            gap: 20px;
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            padding: 20px;
            box-shadow: var(--shadow);
            transition: all var(--transition);
            border: 1px solid var(--border);
        }

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

        .news-item__thumb {
            width: 120px;
            height: 90px;
            border-radius: var(--radius-sm);
            object-fit: cover;
            flex-shrink: 0;
            background: var(--border);
        }

        .news-item__body {
            flex: 1;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .news-item__title {
            font-size: 1rem;
            font-weight: 600;
            color: var(--primary-dark);
            margin-bottom: 6px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-item__title a {
            color: inherit;
        }
        .news-item__title a:hover {
            color: var(--secondary);
        }

        .news-item__meta {
            display: flex;
            gap: 16px;
            font-size: 0.8rem;
            color: var(--text-light);
        }

        .news-item__meta span {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 48px 24px;
            color: var(--text-light);
            font-size: 1rem;
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }

        /* ===== 标签 ===== */
        .tag {
            display: inline-block;
            font-size: 0.78rem;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 50px;
            background: rgba(26, 54, 93, 0.08);
            color: var(--primary);
            transition: all var(--transition);
        }

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

        .tag--secondary {
            background: rgba(201, 168, 76, 0.15);
            color: var(--secondary-dark);
        }

        .tag--secondary:hover {
            background: var(--secondary);
            color: var(--primary-dark);
        }

        /* ===== 分隔线 ===== */
        .divider {
            width: 100%;
            height: 1px;
            background: var(--border);
            margin: 0;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .category-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
            .steps {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer__inner {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .grid--4 {
                grid-template-columns: repeat(2, 1fr);
            }
            .news-list {
                grid-template-columns: 1fr;
            }
            .hero__title {
                font-size: 2.5rem;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-h: 64px;
            }

            .header__toggle {
                display: block;
            }

            .header__nav {
                position: fixed;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 16px 24px;
                gap: 4px;
                border-bottom: 1px solid var(--border);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: all 0.35s ease;
                box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
            }

            .header__nav.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }

            .header__nav--left,
            .header__nav--right {
                flex: none;
                justify-content: center;
                width: 100%;
            }

            .header__nav a {
                width: 100%;
                text-align: center;
                padding: 12px 18px;
                font-size: 1rem;
            }

            .header__nav a.active::after {
                display: none;
            }

            .hero {
                padding: 120px 0 80px;
                min-height: 60vh;
            }

            .hero__title {
                font-size: 2rem;
            }

            .hero__desc {
                font-size: 1rem;
            }

            .section {
                padding: 56px 0;
            }

            .section__title {
                font-size: 1.625rem;
            }

            .grid--2,
            .grid--3,
            .grid--4 {
                grid-template-columns: 1fr;
            }

            .category-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }

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

            .stat-item__number {
                font-size: 2rem;
            }

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

            .footer__inner {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .news-item {
                flex-direction: column;
            }

            .news-item__thumb {
                width: 100%;
                height: 160px;
            }

            .btn {
                padding: 12px 28px;
                font-size: 0.95rem;
            }

            .hero__actions {
                flex-direction: column;
                align-items: center;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

            .hero__title {
                font-size: 1.625rem;
            }

            .hero__badge {
                font-size: 0.75rem;
                padding: 4px 16px;
            }

            .category-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }

            .category-card {
                padding: 24px 16px;
            }

            .category-card__icon {
                font-size: 1.8rem;
            }

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

            .stat-item__number {
                font-size: 1.625rem;
            }

            .section__title {
                font-size: 1.375rem;
            }

            .card__body {
                padding: 16px;
            }

            .footer__inner {
                gap: 20px;
            }
        }

        /* ===== 辅助类 ===== */
        .text-center {
            text-align: center;
        }
        .mt-8 {
            margin-top: 8px;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .mt-48 {
            margin-top: 48px;
        }
        .mb-8 {
            margin-bottom: 8px;
        }
        .mb-16 {
            margin-bottom: 16px;
        }
        .mb-24 {
            margin-bottom: 24px;
        }
        .gap-8 {
            gap: 8px;
        }
        .gap-16 {
            gap: 16px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .flex-wrap {
            flex-wrap: wrap;
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #2563eb;
            --primary-light: #3b82f6;
            --primary-dark: #1d4ed8;
            --primary-bg: #eff6ff;
            --secondary: #7c3aed;
            --secondary-light: #8b5cf6;
            --accent: #f59e0b;
            --accent-light: #fbbf24;
            --bg: #ffffff;
            --bg-alt: #f8fafc;
            --bg-card: #ffffff;
            --text: #0f172a;
            --text-light: #475569;
            --text-muted: #94a3b8;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.08);
            --radius-sm: 8px;
            --radius: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --container: 1200px;
            --header-h: 72px;
            --wave-color: rgba(37, 99, 235, 0.04);
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
        }
        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            padding-top: var(--header-h);
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius);
        }
        button,
        input,
        textarea {
            font-family: var(--font);
            font-size: 1rem;
            border: none;
            outline: none;
            transition: var(--transition);
        }
        button {
            cursor: pointer;
            background: none;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--text);
        }
        h1 {
            font-size: clamp(2rem, 5vw, 3.2rem);
        }
        h2 {
            font-size: clamp(1.6rem, 3.5vw, 2.4rem);
            margin-bottom: 0.5em;
        }
        h3 {
            font-size: clamp(1.2rem, 2.5vw, 1.6rem);
        }
        p {
            color: var(--text-light);
            margin-bottom: 1em;
        }
        .container {
            width: 100%;
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header & Navigation ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-h);
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border);
            transition: var(--transition);
        }
        .header__inner {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
        }
        .header__logo {
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--text);
            letter-spacing: -0.3px;
            text-decoration: none;
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
            white-space: nowrap;
            transition: var(--transition);
        }
        .header__logo span {
            color: var(--primary);
        }
        .header__logo:hover {
            color: var(--primary);
        }
        .header__nav {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .header__nav--left {
            margin-right: auto;
            padding-right: 80px;
        }
        .header__nav--right {
            margin-left: auto;
            padding-left: 80px;
        }
        .header__nav a {
            padding: 8px 18px;
            border-radius: 40px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-light);
            text-decoration: none;
            transition: var(--transition);
            white-space: nowrap;
        }
        .header__nav a:hover {
            color: var(--primary);
            background: var(--primary-bg);
        }
        .header__nav a.active {
            color: var(--primary);
            background: var(--primary-bg);
            font-weight: 600;
        }
        .header__toggle {
            display: none;
            font-size: 1.3rem;
            color: var(--text);
            padding: 8px 12px;
            border-radius: 8px;
            background: var(--bg-alt);
            position: absolute;
            right: 20px;
            top: 50%;
            transform: translateY(-50%);
            z-index: 101;
            border: 1px solid var(--border);
        }
        .header__toggle:hover {
            background: var(--border);
        }

        /* ===== Mobile Menu ===== */
        .mobile-menu {
            display: none;
            position: fixed;
            top: var(--header-h);
            left: 0;
            right: 0;
            background: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border);
            padding: 20px 24px;
            z-index: 999;
            box-shadow: var(--shadow-lg);
            transform: translateY(-110%);
            transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .mobile-menu.open {
            transform: translateY(0);
        }
        .mobile-menu a {
            display: block;
            padding: 14px 18px;
            font-size: 1.05rem;
            font-weight: 500;
            color: var(--text-light);
            border-radius: var(--radius-sm);
            transition: var(--transition);
            text-decoration: none;
        }
        .mobile-menu a:hover,
        .mobile-menu a.active {
            color: var(--primary);
            background: var(--primary-bg);
        }
        .mobile-menu a.active {
            font-weight: 600;
        }

        /* ===== Hero / Banner ===== */
        .hero {
            position: relative;
            min-height: 420px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            background: var(--bg-alt);
            overflow: hidden;
            padding: 80px 24px 60px;
        }
        .hero__bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.2;
            z-index: 0;
        }
        .hero__overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(37, 99, 235, 0.06) 0%, rgba(124, 58, 237, 0.06) 100%);
            z-index: 1;
        }
        .hero__wave {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 80px;
            background: var(--bg);
            border-radius: 60% 60% 0 0 / 100% 100% 0 0;
            z-index: 2;
        }
        .hero__content {
            position: relative;
            z-index: 3;
            max-width: 820px;
        }
        .hero__badge {
            display: inline-block;
            background: var(--primary-bg);
            color: var(--primary);
            padding: 6px 20px;
            border-radius: 40px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 20px;
            letter-spacing: 0.3px;
            border: 1px solid rgba(37, 99, 235, 0.15);
        }
        .hero__title {
            font-size: clamp(2rem, 5vw, 3.2rem);
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 20px;
            color: var(--text);
        }
        .hero__title span {
            color: var(--primary);
        }
        .hero__desc {
            font-size: 1.1rem;
            color: var(--text-light);
            max-width: 640px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }
        .hero__actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 34px;
            border-radius: 40px;
            font-size: 1rem;
            font-weight: 600;
            text-decoration: none;
            transition: var(--transition);
            border: none;
            cursor: pointer;
            line-height: 1.2;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(37, 99, 235, 0.35);
        }
        .btn-secondary {
            background: var(--bg);
            color: var(--text);
            border: 1.5px solid var(--border);
            box-shadow: var(--shadow-sm);
        }
        .btn-secondary:hover {
            background: var(--bg-alt);
            border-color: var(--primary);
            color: var(--primary);
            transform: translateY(-2px);
            box-shadow: var(--shadow);
        }
        .btn-accent {
            background: var(--accent);
            color: #fff;
            box-shadow: 0 4px 14px rgba(245, 158, 11, 0.3);
        }
        .btn-accent:hover {
            background: #d97706;
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(245, 158, 11, 0.35);
        }

        /* ===== Section Common ===== */
        .section {
            padding: 80px 0;
        }
        .section--alt {
            background: var(--bg-alt);
        }
        .section--wave-top {
            position: relative;
            margin-top: -40px;
            padding-top: 40px;
        }
        .section__header {
            text-align: center;
            max-width: 700px;
            margin: 0 auto 56px;
        }
        .section__header h2 {
            margin-bottom: 16px;
        }
        .section__header p {
            font-size: 1.1rem;
            color: var(--text-light);
        }
        .section__badge {
            display: inline-block;
            background: var(--primary-bg);
            color: var(--primary);
            padding: 4px 16px;
            border-radius: 40px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-bottom: 12px;
            letter-spacing: 0.3px;
        }

        /* ===== Game Category Cards ===== */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary);
        }
        .card__img {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            display: block;
            background: var(--bg-alt);
        }
        .card__body {
            padding: 24px 22px 26px;
        }
        .card__tag {
            display: inline-block;
            background: var(--primary-bg);
            color: var(--primary);
            padding: 3px 14px;
            border-radius: 40px;
            font-size: 0.75rem;
            font-weight: 600;
            margin-bottom: 10px;
            letter-spacing: 0.2px;
        }
        .card__title {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text);
        }
        .card__desc {
            font-size: 0.92rem;
            color: var(--text-light);
            line-height: 1.6;
            margin-bottom: 16px;
        }
        .card__meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.82rem;
            color: var(--text-muted);
        }
        .card__meta i {
            margin-right: 4px;
        }
        .card__link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--primary);
            font-weight: 600;
            font-size: 0.92rem;
            transition: var(--transition);
        }
        .card__link:hover {
            gap: 10px;
            color: var(--primary-dark);
        }

        /* ===== Feature Section ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .feature-item {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 24px;
            text-align: center;
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .feature-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow);
            border-color: var(--primary-light);
        }
        .feature-item__icon {
            width: 56px;
            height: 56px;
            border-radius: 16px;
            background: var(--primary-bg);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            font-size: 1.5rem;
            color: var(--primary);
            transition: var(--transition);
        }
        .feature-item:hover .feature-item__icon {
            background: var(--primary);
            color: #fff;
        }
        .feature-item__title {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text);
        }
        .feature-item__desc {
            font-size: 0.88rem;
            color: var(--text-light);
            line-height: 1.6;
            margin-bottom: 0;
        }

        /* ===== Stats / Numbers ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            text-align: center;
        }
        .stat-item__num {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.1;
            letter-spacing: -1px;
        }
        .stat-item__label {
            font-size: 0.92rem;
            color: var(--text-light);
            margin-top: 6px;
        }

        /* ===== Download Process ===== */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            counter-reset: step;
        }
        .process-step {
            text-align: center;
            position: relative;
            padding: 32px 16px;
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .process-step:hover {
            box-shadow: var(--shadow);
            border-color: var(--primary-light);
        }
        .process-step::before {
            counter-increment: step;
            content: counter(step);
            position: absolute;
            top: 16px;
            right: 20px;
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--border);
            line-height: 1;
            opacity: 0.4;
            transition: var(--transition);
        }
        .process-step:hover::before {
            color: var(--primary);
            opacity: 0.15;
        }
        .process-step__icon {
            font-size: 2rem;
            color: var(--primary);
            margin-bottom: 16px;
            display: block;
        }
        .process-step__title {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--text);
        }
        .process-step__desc {
            font-size: 0.88rem;
            color: var(--text-light);
            line-height: 1.6;
            margin-bottom: 0;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary-light);
        }
        .faq-item__question {
            padding: 18px 24px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text);
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            background: none;
            width: 100%;
            text-align: left;
            border: none;
            transition: var(--transition);
            gap: 16px;
        }
        .faq-item__question i {
            color: var(--primary);
            font-size: 1.1rem;
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item__question.open i {
            transform: rotate(180deg);
        }
        .faq-item__answer {
            padding: 0 24px 18px;
            font-size: 0.95rem;
            color: var(--text-light);
            line-height: 1.7;
            display: none;
        }
        .faq-item__answer.open {
            display: block;
        }

        /* ===== CTA ===== */
        .cta {
            background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
            border-radius: var(--radius-lg);
            padding: 60px 48px;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .cta::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.06;
            z-index: 0;
        }
        .cta * {
            position: relative;
            z-index: 1;
        }
        .cta h2 {
            color: #fff;
            font-size: clamp(1.6rem, 3vw, 2.2rem);
            margin-bottom: 12px;
        }
        .cta p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 1.05rem;
            max-width: 560px;
            margin: 0 auto 28px;
        }
        .cta .btn {
            background: #fff;
            color: var(--primary);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.12);
        }
        .cta .btn:hover {
            background: var(--bg-alt);
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.18);
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--text);
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 24px 30px;
        }
        .footer__inner {
            max-width: var(--container);
            margin: 0 auto;
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 40px;
        }
        .footer__brand {
            font-size: 1.3rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
        }
        .footer__brand span {
            color: var(--primary-light);
        }
        .footer__desc {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.7;
            max-width: 340px;
        }
        .footer__heading {
            font-size: 0.95rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }
        .footer__links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer__links a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            text-decoration: none;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .footer__links a:hover {
            color: #fff;
            transform: translateX(4px);
        }
        .footer__bottom {
            max-width: var(--container);
            margin: 40px auto 0;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer__inner {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .header__nav--left,
            .header__nav--right {
                display: none;
            }
            .header__toggle {
                display: flex;
                align-items: center;
                justify-content: center;
            }
            .header__logo {
                position: static;
                transform: none;
                margin: 0 auto;
            }
            .header__inner {
                justify-content: space-between;
            }
            .mobile-menu {
                display: block;
            }
            .grid-3 {
                grid-template-columns: repeat(2, 1fr);
            }
            .grid-2 {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 768px) {
            .hero {
                min-height: 320px;
                padding: 60px 20px 40px;
            }
            .section {
                padding: 56px 0;
            }
            .section__header {
                margin-bottom: 36px;
            }
            .section__header h2 {
                font-size: 1.6rem;
            }
            .grid-3 {
                grid-template-columns: 1fr;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .stat-item__num {
                font-size: 2rem;
            }
            .process-grid {
                grid-template-columns: 1fr;
            }
            .cta {
                padding: 40px 24px;
                border-radius: var(--radius);
            }
            .footer__inner {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer__desc {
                max-width: 100%;
            }
            .hero__actions {
                flex-direction: column;
                align-items: center;
            }
            .btn {
                width: 100%;
                max-width: 320px;
                justify-content: center;
            }
        }
        @media (max-width: 520px) {
            body {
                padding-top: 64px;
            }
            :root {
                --header-h: 64px;
            }
            .header__logo {
                font-size: 1.1rem;
            }
            .header__inner {
                padding: 0 16px;
            }
            .hero__title {
                font-size: 1.6rem;
            }
            .hero__desc {
                font-size: 0.95rem;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-item__num {
                font-size: 1.8rem;
            }
            .section {
                padding: 40px 0;
            }
            .container {
                padding: 0 16px;
            }
            .cta {
                padding: 32px 18px;
            }
            .faq-item__question {
                padding: 14px 16px;
                font-size: 0.92rem;
            }
            .faq-item__answer {
                padding: 0 16px 14px;
                font-size: 0.88rem;
            }
        }

        /* ===== Utility ===== */
        .text-center {
            text-align: center;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .mb-16 {
            margin-bottom: 16px;
        }
        .mb-32 {
            margin-bottom: 32px;
        }
        .gap-8 {
            gap: 8px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .tag {
            display: inline-block;
            background: var(--primary-bg);
            color: var(--primary);
            padding: 4px 14px;
            border-radius: 40px;
            font-size: 0.78rem;
            font-weight: 600;
            letter-spacing: 0.2px;
        }
        .tag--alt {
            background: rgba(124, 58, 237, 0.08);
            color: var(--secondary);
        }
        .tag--accent {
            background: rgba(245, 158, 11, 0.1);
            color: #b45309;
        }

        /* ===== Content Intro ===== */
        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .intro-content h2 {
            margin-bottom: 16px;
        }
        .intro-content p {
            font-size: 1.02rem;
            line-height: 1.8;
            color: var(--text-light);
        }
        .intro-content ul {
            margin-top: 20px;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .intro-content ul li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 0.95rem;
            color: var(--text-light);
        }
        .intro-content ul li i {
            color: var(--primary);
            margin-top: 3px;
            flex-shrink: 0;
        }
        .intro-image img {
            border-radius: var(--radius);
            box-shadow: var(--shadow-lg);
            width: 100%;
            aspect-ratio: 4 / 3;
            object-fit: cover;
        }

        @media (max-width: 768px) {
            .intro-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .intro-image {
                order: -1;
            }
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-muted);
            padding: 16px 0 0;
            max-width: var(--container);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        .breadcrumb a {
            color: var(--text-muted);
            text-decoration: none;
            transition: var(--transition);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb span {
            color: var(--text-light);
            font-weight: 500;
        }
        .breadcrumb i {
            font-size: 0.7rem;
            color: var(--text-muted);
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
    :root {
        --primary: #1e2d3d;
        --primary-light: #2a4055;
        --primary-dark: #131f2b;
        --accent: #d4896a;
        --accent-light: #e8aa8a;
        --accent-dark: #b86e4e;
        --bg: #f7f4f0;
        --bg-card: #ffffff;
        --bg-soft: #f0ece7;
        --bg-dark: #1a2633;
        --text: #2c2c2c;
        --text-light: #6a6a6a;
        --text-weak: #99928c;
        --text-on-dark: #f0eae4;
        --border: #e5e0db;
        --border-light: #f0ece7;
        --radius-sm: 6px;
        --radius-md: 12px;
        --radius-lg: 20px;
        --radius-xl: 28px;
        --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
        --shadow-md: 0 8px 28px rgba(0,0,0,0.07);
        --shadow-lg: 0 20px 48px rgba(0,0,0,0.10);
        --shadow-accent: 0 4px 16px rgba(212,137,106,0.30);
        --transition: 0.30s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
        --max-width: 1200px;
        --header-height: 72px;
    }

    /* ===== Reset & Base ===== */
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; font-size: 16px; }
    body {
        font-family: var(--font-sans);
        color: var(--text);
        background: var(--bg);
        line-height: 1.7;
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
        padding-top: var(--header-height);
    }
    img { max-width: 100%; height: auto; display: block; }
    a { color: inherit; text-decoration: none; transition: var(--transition); }
    button { font-family: inherit; cursor: pointer; border: none; background: none; }
    input, textarea { font-family: inherit; }
    ul, ol { list-style: none; }
    h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 600; color: var(--primary); }

    /* ===== Container ===== */
    .container {
        max-width: var(--max-width);
        margin: 0 auto;
        padding: 0 24px;
    }
    @media (max-width: 768px) {
        .container { padding: 0 16px; }
    }

    /* ===== 导航 Header ===== */
    .header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        height: var(--header-height);
        background: rgba(255,255,255,0.92);
        backdrop-filter: blur(18px);
        -webkit-backdrop-filter: blur(18px);
        border-bottom: 1px solid var(--border-light);
        z-index: 1000;
        transition: var(--transition);
    }
    .header.scrolled {
        box-shadow: 0 2px 24px rgba(0,0,0,0.06);
        background: rgba(255,255,255,0.97);
    }
    .header__inner {
        max-width: var(--max-width);
        margin: 0 auto;
        padding: 0 24px;
        height: 100%;
        display: flex;
        align-items: center;
        justify-content: center;
        position: relative;
    }
    .header__logo {
        font-size: 1.35rem;
        font-weight: 700;
        letter-spacing: -0.3px;
        color: var(--primary);
        position: absolute;
        left: 50%;
        transform: translateX(-50%);
        white-space: nowrap;
        transition: var(--transition);
    }
    .header__logo span {
        color: var(--accent);
        font-weight: 600;
    }
    .header__logo:hover { opacity: 0.8; }
    .header__nav {
        display: flex;
        align-items: center;
        gap: 8px;
    }
    .header__nav--left { margin-right: auto; padding-right: 80px; }
    .header__nav--right { margin-left: auto; padding-left: 80px; }
    .header__nav a {
        padding: 8px 18px;
        border-radius: var(--radius-sm);
        font-size: 0.92rem;
        font-weight: 500;
        color: var(--text-light);
        transition: var(--transition);
        position: relative;
    }
    .header__nav a:hover {
        color: var(--primary);
        background: var(--bg-soft);
    }
    .header__nav a.active {
        color: var(--accent);
        background: rgba(212,137,106,0.10);
        font-weight: 600;
    }
    .header__nav a.active::after {
        content: '';
        position: absolute;
        bottom: 4px;
        left: 50%;
        transform: translateX(-50%);
        width: 20px;
        height: 2px;
        background: var(--accent);
        border-radius: 2px;
    }
    .header__toggle {
        display: none;
        font-size: 1.4rem;
        color: var(--primary);
        padding: 8px 12px;
        border-radius: var(--radius-sm);
        position: absolute;
        right: 16px;
        top: 50%;
        transform: translateY(-50%);
        z-index: 1001;
    }
    .header__toggle:hover { background: var(--bg-soft); }

    /* 移动端导航 */
    @media (max-width: 900px) {
        .header__nav--left,
        .header__nav--right {
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            background: rgba(255,255,255,0.98);
            backdrop-filter: blur(18px);
            flex-direction: column;
            padding: 16px 24px;
            gap: 4px;
            box-shadow: 0 12px 40px rgba(0,0,0,0.10);
            transform: translateY(-110%);
            opacity: 0;
            pointer-events: none;
            transition: var(--transition);
            border-bottom: 1px solid var(--border-light);
            margin: 0;
        }
        .header__nav--left { padding-right: 24px; }
        .header__nav--right { padding-left: 24px; }
        .header__nav--left.open,
        .header__nav--right.open {
            transform: translateY(0);
            opacity: 1;
            pointer-events: auto;
        }
        .header__nav a {
            padding: 12px 16px;
            font-size: 1rem;
            width: 100%;
            border-radius: var(--radius-sm);
        }
        .header__toggle { display: block; }
        .header__logo {
            position: relative;
            left: auto;
            transform: none;
            margin: 0 auto;
        }
        .header__inner { justify-content: space-between; }
    }
    @media (max-width: 480px) {
        .header__logo { font-size: 1.1rem; }
        .header__inner { padding: 0 12px; }
    }

    /* ===== 面包屑 ===== */
    .breadcrumb {
        padding: 24px 0 8px;
        font-size: 0.85rem;
        color: var(--text-weak);
        display: flex;
        flex-wrap: wrap;
        gap: 6px;
        align-items: center;
    }
    .breadcrumb a { color: var(--text-light); }
    .breadcrumb a:hover { color: var(--accent); }
    .breadcrumb span { color: var(--text-weak); }
    .breadcrumb .sep { margin: 0 4px; color: var(--border); }

    /* ===== 文章 Hero ===== */
    .article-hero {
        position: relative;
        padding: 48px 0 32px;
        background: var(--bg-dark);
        background-image: url('/assets/images/backpic/back-1.png');
        background-size: cover;
        background-position: center;
        background-blend-mode: overlay;
        margin-top: -1px;
        overflow: hidden;
    }
    .article-hero::before {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient(135deg, rgba(26,38,51,0.88) 0%, rgba(30,45,61,0.78) 100%);
        z-index: 1;
    }
    .article-hero .container {
        position: relative;
        z-index: 2;
    }
    .article-hero .breadcrumb a,
    .article-hero .breadcrumb span { color: rgba(240,234,228,0.7); }
    .article-hero .breadcrumb a:hover { color: var(--accent-light); }
    .article-hero .breadcrumb .sep { color: rgba(240,234,228,0.25); }
    .article-hero h1 {
        font-size: 2.4rem;
        font-weight: 700;
        color: var(--text-on-dark);
        max-width: 900px;
        line-height: 1.25;
        letter-spacing: -0.5px;
        margin: 16px 0 12px;
    }
    .article-hero .meta {
        display: flex;
        flex-wrap: wrap;
        gap: 20px;
        align-items: center;
        color: rgba(240,234,228,0.7);
        font-size: 0.9rem;
    }
    .article-hero .meta .cat {
        display: inline-block;
        padding: 4px 14px;
        background: var(--accent);
        color: #fff;
        border-radius: 20px;
        font-size: 0.78rem;
        font-weight: 600;
        letter-spacing: 0.3px;
    }
    .article-hero .meta i { margin-right: 5px; opacity: 0.7; }
    @media (max-width: 768px) {
        .article-hero { padding: 32px 0 24px; }
        .article-hero h1 { font-size: 1.6rem; }
        .article-hero .meta { gap: 12px; font-size: 0.82rem; }
    }
    @media (max-width: 480px) {
        .article-hero h1 { font-size: 1.35rem; }
    }

    /* ===== 文章正文 ===== */
    .article-body {
        padding: 48px 0 40px;
        background: var(--bg);
    }
    .article-layout {
        display: grid;
        grid-template-columns: 1fr 320px;
        gap: 48px;
    }
    .article-main { min-width: 0; }
    .article-featured-image {
        margin-bottom: 32px;
        border-radius: var(--radius-md);
        overflow: hidden;
        box-shadow: var(--shadow-md);
        background: var(--bg-soft);
    }
    .article-featured-image img {
        width: 100%;
        height: auto;
        aspect-ratio: 16/9;
        object-fit: cover;
        transition: var(--transition);
    }
    .article-featured-image img:hover { transform: scale(1.01); }
    .article-content {
        font-size: 1.05rem;
        line-height: 1.85;
        color: var(--text);
    }
    .article-content p {
        margin-bottom: 1.4em;
    }
    .article-content h2 {
        font-size: 1.5rem;
        margin: 2em 0 0.8em;
        color: var(--primary);
        font-weight: 700;
        letter-spacing: -0.3px;
    }
    .article-content h3 {
        font-size: 1.2rem;
        margin: 1.6em 0 0.6em;
        color: var(--primary-light);
        font-weight: 600;
    }
    .article-content ul, .article-content ol {
        margin: 1em 0 1.4em;
        padding-left: 1.6em;
    }
    .article-content li {
        margin-bottom: 0.4em;
        list-style: disc;
    }
    .article-content ol li { list-style: decimal; }
    .article-content blockquote {
        margin: 1.6em 0;
        padding: 20px 28px;
        background: var(--bg-soft);
        border-left: 4px solid var(--accent);
        border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
        color: var(--text-light);
        font-style: italic;
    }
    .article-content a {
        color: var(--accent);
        border-bottom: 1px solid transparent;
    }
    .article-content a:hover { border-bottom-color: var(--accent); }
    .article-content img {
        border-radius: var(--radius-sm);
        margin: 1.6em auto;
        box-shadow: var(--shadow-sm);
    }
    .article-content code {
        background: var(--bg-soft);
        padding: 2px 8px;
        border-radius: 4px;
        font-size: 0.9em;
        color: var(--accent-dark);
    }
    .article-content pre {
        background: var(--bg-dark);
        color: var(--text-on-dark);
        padding: 20px 24px;
        border-radius: var(--radius-sm);
        overflow-x: auto;
        margin: 1.4em 0;
        font-size: 0.9rem;
    }

    /* 标签 */
    .article-tags {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
        margin-top: 40px;
        padding-top: 28px;
        border-top: 1px solid var(--border-light);
    }
    .article-tags .tag {
        display: inline-block;
        padding: 6px 16px;
        background: var(--bg-soft);
        border-radius: 20px;
        font-size: 0.82rem;
        color: var(--text-light);
        transition: var(--transition);
        border: 1px solid transparent;
    }
    .article-tags .tag:hover {
        background: var(--accent);
        color: #fff;
        border-color: var(--accent);
        transform: translateY(-1px);
        box-shadow: var(--shadow-accent);
    }

    /* 上下篇导航 */
    .article-prevnext {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 16px;
        margin-top: 40px;
        padding-top: 28px;
        border-top: 1px solid var(--border-light);
    }
    .article-prevnext a {
        display: flex;
        align-items: center;
        gap: 12px;
        padding: 16px 20px;
        background: var(--bg-card);
        border-radius: var(--radius-md);
        border: 1px solid var(--border-light);
        transition: var(--transition);
        font-size: 0.92rem;
        font-weight: 500;
        color: var(--text);
    }
    .article-prevnext a:hover {
        border-color: var(--accent);
        box-shadow: var(--shadow-sm);
        transform: translateY(-2px);
    }
    .article-prevnext .next { justify-content: flex-end; text-align: right; }
    .article-prevnext i { font-size: 1.1rem; color: var(--accent); }
    .article-prevnext .dir { font-size: 0.75rem; color: var(--text-weak); display: block; font-weight: 400; }
    @media (max-width: 640px) {
        .article-prevnext { grid-template-columns: 1fr; }
        .article-prevnext .next { justify-content: flex-start; text-align: left; }
    }

    /* 侧边栏 */
    .article-sidebar {
        display: flex;
        flex-direction: column;
        gap: 32px;
    }
    .sidebar-card {
        background: var(--bg-card);
        border-radius: var(--radius-md);
        padding: 28px 24px;
        border: 1px solid var(--border-light);
        box-shadow: var(--shadow-sm);
    }
    .sidebar-card h3 {
        font-size: 1.05rem;
        font-weight: 700;
        margin-bottom: 16px;
        padding-bottom: 12px;
        border-bottom: 2px solid var(--accent);
        display: inline-block;
    }
    .sidebar-list li {
        padding: 10px 0;
        border-bottom: 1px solid var(--border-light);
    }
    .sidebar-list li:last-child { border-bottom: none; }
    .sidebar-list a {
        display: flex;
        gap: 12px;
        align-items: flex-start;
        color: var(--text);
        transition: var(--transition);
    }
    .sidebar-list a:hover { color: var(--accent); }
    .sidebar-list .s-thumb {
        width: 64px;
        height: 48px;
        border-radius: 6px;
        object-fit: cover;
        background: var(--bg-soft);
        flex-shrink: 0;
    }
    .sidebar-list .s-title {
        font-size: 0.9rem;
        font-weight: 500;
        line-height: 1.4;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    .sidebar-list .s-date {
        font-size: 0.75rem;
        color: var(--text-weak);
        margin-top: 4px;
    }
    .sidebar-cta {
        background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
        color: var(--text-on-dark);
        border: none;
    }
    .sidebar-cta h3 {
        color: var(--text-on-dark);
        border-bottom-color: var(--accent);
    }
    .sidebar-cta p {
        font-size: 0.92rem;
        opacity: 0.85;
        margin-bottom: 20px;
    }
    .sidebar-cta .btn {
        display: inline-block;
        padding: 12px 28px;
        background: var(--accent);
        color: #fff;
        border-radius: var(--radius-sm);
        font-weight: 600;
        font-size: 0.95rem;
        transition: var(--transition);
        text-align: center;
    }
    .sidebar-cta .btn:hover {
        background: var(--accent-light);
        transform: translateY(-2px);
        box-shadow: var(--shadow-accent);
    }

    @media (max-width: 1024px) {
        .article-layout { grid-template-columns: 1fr; gap: 40px; }
        .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
    }
    @media (max-width: 640px) {
        .article-sidebar { grid-template-columns: 1fr; }
        .article-body { padding: 32px 0; }
        .article-content { font-size: 1rem; }
    }

    /* ===== 相关文章 ===== */
    .related-section {
        padding: 56px 0 64px;
        background: var(--bg-soft);
    }
    .related-section .section-title {
        font-size: 1.6rem;
        font-weight: 700;
        text-align: center;
        margin-bottom: 8px;
        color: var(--primary);
    }
    .related-section .section-sub {
        text-align: center;
        color: var(--text-light);
        font-size: 0.95rem;
        margin-bottom: 36px;
    }
    .related-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 24px;
    }
    .related-card {
        background: var(--bg-card);
        border-radius: var(--radius-md);
        overflow: hidden;
        border: 1px solid var(--border-light);
        box-shadow: var(--shadow-sm);
        transition: var(--transition);
    }
    .related-card:hover {
        transform: translateY(-4px);
        box-shadow: var(--shadow-md);
        border-color: var(--accent);
    }
    .related-card .rc-img {
        width: 100%;
        aspect-ratio: 16/10;
        object-fit: cover;
        background: var(--bg-soft);
        transition: var(--transition);
    }
    .related-card:hover .rc-img { transform: scale(1.02); }
    .related-card .rc-body {
        padding: 20px 20px 24px;
    }
    .related-card .rc-cat {
        display: inline-block;
        padding: 2px 12px;
        background: rgba(212,137,106,0.12);
        color: var(--accent);
        border-radius: 12px;
        font-size: 0.72rem;
        font-weight: 600;
        letter-spacing: 0.3px;
        margin-bottom: 8px;
    }
    .related-card .rc-title {
        font-size: 1rem;
        font-weight: 600;
        color: var(--primary);
        line-height: 1.4;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
        transition: var(--transition);
    }
    .related-card:hover .rc-title { color: var(--accent); }
    .related-card .rc-date {
        font-size: 0.78rem;
        color: var(--text-weak);
        margin-top: 8px;
        display: flex;
        align-items: center;
        gap: 6px;
    }
    @media (max-width: 900px) {
        .related-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 520px) {
        .related-grid { grid-template-columns: 1fr; }
        .related-section .section-title { font-size: 1.3rem; }
    }

    /* ===== CTA ===== */
    .cta-section {
        padding: 64px 0 72px;
        background: var(--bg-dark);
        background-image: url('/assets/images/backpic/back-2.png');
        background-size: cover;
        background-position: center;
        background-blend-mode: overlay;
        position: relative;
    }
    .cta-section::before {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient(135deg, rgba(26,38,51,0.92) 0%, rgba(30,45,61,0.85) 100%);
        z-index: 1;
    }
    .cta-section .container {
        position: relative;
        z-index: 2;
        text-align: center;
    }
    .cta-section h2 {
        font-size: 1.8rem;
        font-weight: 700;
        color: var(--text-on-dark);
        margin-bottom: 12px;
    }
    .cta-section p {
        font-size: 1.05rem;
        color: rgba(240,234,228,0.75);
        max-width: 600px;
        margin: 0 auto 32px;
    }
    .cta-section .btn-group {
        display: flex;
        gap: 16px;
        justify-content: center;
        flex-wrap: wrap;
    }
    .cta-section .btn-primary {
        display: inline-block;
        padding: 14px 40px;
        background: var(--accent);
        color: #fff;
        border-radius: var(--radius-sm);
        font-weight: 600;
        font-size: 1rem;
        transition: var(--transition);
        box-shadow: var(--shadow-accent);
    }
    .cta-section .btn-primary:hover {
        background: var(--accent-light);
        transform: translateY(-2px);
        box-shadow: 0 8px 28px rgba(212,137,106,0.40);
    }
    .cta-section .btn-outline {
        display: inline-block;
        padding: 14px 40px;
        border: 2px solid rgba(240,234,228,0.30);
        color: var(--text-on-dark);
        border-radius: var(--radius-sm);
        font-weight: 600;
        font-size: 1rem;
        transition: var(--transition);
    }
    .cta-section .btn-outline:hover {
        border-color: var(--accent);
        background: rgba(212,137,106,0.10);
        color: var(--accent-light);
    }
    @media (max-width: 640px) {
        .cta-section { padding: 48px 0 56px; }
        .cta-section h2 { font-size: 1.4rem; }
        .cta-section p { font-size: 0.95rem; }
        .cta-section .btn-primary,
        .cta-section .btn-outline { padding: 12px 28px; font-size: 0.92rem; }
    }

    /* ===== 页脚 Footer ===== */
    .footer {
        background: var(--primary-dark);
        color: rgba(240,234,228,0.7);
        padding: 56px 0 0;
    }
    .footer__inner {
        max-width: var(--max-width);
        margin: 0 auto;
        padding: 0 24px;
        display: grid;
        grid-template-columns: 2fr 1fr 1fr 1fr;
        gap: 40px;
    }
    .footer__brand {
        font-size: 1.3rem;
        font-weight: 700;
        color: var(--text-on-dark);
        margin-bottom: 12px;
    }
    .footer__brand span { color: var(--accent); }
    .footer__desc {
        font-size: 0.9rem;
        line-height: 1.7;
        opacity: 0.75;
        max-width: 340px;
    }
    .footer__heading {
        font-size: 1rem;
        font-weight: 600;
        color: var(--text-on-dark);
        margin-bottom: 16px;
        position: relative;
        padding-bottom: 10px;
    }
    .footer__heading::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 0;
        width: 28px;
        height: 2px;
        background: var(--accent);
        border-radius: 2px;
    }
    .footer__links {
        display: flex;
        flex-direction: column;
        gap: 10px;
    }
    .footer__links a {
        font-size: 0.88rem;
        color: rgba(240,234,228,0.6);
        transition: var(--transition);
        display: inline-flex;
        align-items: center;
        gap: 6px;
    }
    .footer__links a:hover {
        color: var(--accent-light);
        transform: translateX(4px);
    }
    .footer__links a i { font-size: 0.8rem; opacity: 0.6; }
    .footer__bottom {
        margin-top: 40px;
        padding: 20px 24px;
        border-top: 1px solid rgba(255,255,255,0.06);
        text-align: center;
        font-size: 0.82rem;
        color: rgba(240,234,228,0.4);
    }
    @media (max-width: 900px) {
        .footer__inner { grid-template-columns: 1fr 1fr; gap: 32px; }
        .footer__desc { max-width: 100%; }
    }
    @media (max-width: 520px) {
        .footer__inner { grid-template-columns: 1fr; gap: 28px; }
        .footer__bottom { font-size: 0.75rem; }
    }

    /* ===== 找不到文章 ===== */
    .not-found {
        text-align: center;
        padding: 80px 20px;
    }
    .not-found i {
        font-size: 3.6rem;
        color: var(--border);
        margin-bottom: 24px;
    }
    .not-found h2 {
        font-size: 1.6rem;
        color: var(--text);
        margin-bottom: 12px;
    }
    .not-found p {
        color: var(--text-light);
        margin-bottom: 28px;
    }
    .not-found .btn-back {
        display: inline-block;
        padding: 12px 32px;
        background: var(--accent);
        color: #fff;
        border-radius: var(--radius-sm);
        font-weight: 600;
        transition: var(--transition);
    }
    .not-found .btn-back:hover {
        background: var(--accent-light);
        transform: translateY(-2px);
        box-shadow: var(--shadow-accent);
    }

    /* ===== 通用工具 ===== */
    .sr-only {
        position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
        overflow: hidden; clip: rect(0,0,0,0); border: 0;
    }
    @media (prefers-reduced-motion: reduce) {
        *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
    }

    /* 波形装饰 (仅视觉) */
    .wave-divider {
        position: relative;
        height: 48px;
        background: var(--bg);
        overflow: hidden;
    }
    .wave-divider svg {
        position: absolute;
        bottom: 0;
        width: 100%;
        height: 48px;
        fill: var(--bg-soft);
    }