/* roulang page: index */
/* ===== 设计变量 & 基础重置 ===== */
        :root {
            --brand-primary: #4f46e5;
            --brand-primary-light: #818cf8;
            --brand-primary-dark: #3730a3;
            --brand-secondary: #0ea5e9;
            --brand-secondary-light: #38bdf8;
            --bg-body: #ffffff;
            --bg-soft: #f8fafc;
            --bg-card: #ffffff;
            --text-primary: #0f172a;
            --text-secondary: #475569;
            --text-muted: #94a3b8;
            --border-light: #e2e8f0;
            --border-medium: #cbd5e1;
            --radius-sm: 0.375rem;
            --radius-md: 0.75rem;
            --radius-lg: 1.25rem;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
            --transition-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
        }

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

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

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            font-size: 1rem;
            line-height: 1.7;
            color: var(--text-primary);
            background-color: var(--bg-body);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

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

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

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        ul,
        ol {
            list-style: none;
        }

        /* ===== 容器 ===== */
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }

        @media (max-width: 640px) {
            .container {
                padding-left: 1rem;
                padding-right: 1rem;
            }
        }

        /* ===== 导航 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-light);
            box-shadow: 0 1px 4px rgba(0, 0, 0, 0.03);
            transition: box-shadow var(--transition-base);
        }

        .site-header.scrolled {
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }

        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 0.25rem;
        }

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

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

        .logo-wrap {
            flex-shrink: 0;
            padding: 0 1rem;
            text-align: center;
        }

        .logo-link {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--brand-primary-dark);
            letter-spacing: 0.02em;
            transition: opacity var(--transition-base);
        }

        .logo-link:hover {
            color: var(--brand-primary-dark);
            opacity: 0.85;
        }

        .logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--brand-primary), var(--brand-secondary));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.1rem;
            flex-shrink: 0;
        }

        .nav-item {
            display: inline-flex;
            align-items: center;
            padding: 0.5rem 1rem;
            font-size: 0.925rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            transition: all var(--transition-base);
            position: relative;
        }

        .nav-item:hover {
            color: var(--brand-primary);
            background: rgba(79, 70, 229, 0.06);
        }

        .nav-item.active {
            color: var(--brand-primary);
            background: rgba(79, 70, 229, 0.1);
            font-weight: 600;
        }

        .nav-item.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 24px;
            height: 3px;
            background: var(--brand-primary);
            border-radius: 2px;
        }

        .nav-item:focus-visible {
            outline: 2px solid var(--brand-primary-light);
            outline-offset: 2px;
        }

        /* 移动端菜单按钮 */
        .menu-toggle {
            display: none;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            color: var(--text-primary);
            font-size: 1.4rem;
            transition: background var(--transition-base);
        }

        .menu-toggle:hover {
            background: rgba(0, 0, 0, 0.05);
        }

        /* 移动端菜单 */
        .mobile-nav {
            display: none;
            background: var(--bg-body);
            border-top: 1px solid var(--border-light);
            padding: 0.75rem 1.5rem 1.25rem;
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.1);
        }

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

        .mobile-nav .nav-item {
            display: block;
            padding: 0.75rem 1rem;
            border-radius: var(--radius-md);
            font-size: 1.05rem;
        }

        .mobile-nav .nav-item.active::after {
            display: none;
        }

        .mobile-nav .nav-item.active {
            background: rgba(79, 70, 229, 0.1);
        }

        @media (max-width: 768px) {
            .nav-left,
            .nav-right {
                display: none;
            }
            .menu-toggle {
                display: flex;
            }
            .header-inner {
                height: 64px;
            }
            .logo-link {
                font-size: 1.15rem;
            }
            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 0.95rem;
            }
        }

        @media (min-width: 769px) {
            .mobile-nav {
                display: none !important;
            }
        }

        /* ===== Hero 区域 ===== */
        .hero-section {
            position: relative;
            min-height: 88vh;
            display: flex;
            align-items: center;
            justify-content: center;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            overflow: hidden;
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg,
                    rgba(15, 23, 42, 0.70) 0%,
                    rgba(30, 27, 75, 0.55) 50%,
                    rgba(8, 47, 73, 0.60) 100%);
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            padding: 3rem 1.5rem;
            max-width: 820px;
            margin: 0 auto;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.4rem 1.2rem;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.18);
            border-radius: 999px;
            color: rgba(255, 255, 255, 0.92);
            font-size: 0.875rem;
            font-weight: 500;
            margin-bottom: 1.5rem;
            letter-spacing: 0.03em;
        }

        .hero-title {
            font-size: clamp(2.4rem, 7vw, 4.2rem);
            font-weight: 800;
            line-height: 1.15;
            color: #ffffff;
            margin-bottom: 1.25rem;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.25);
            letter-spacing: -0.01em;
        }

        .hero-title .highlight {
            background: linear-gradient(135deg, #a5b4fc, #38bdf8);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-sub {
            font-size: clamp(1.05rem, 2vw, 1.3rem);
            color: rgba(255, 255, 255, 0.85);
            max-width: 620px;
            margin: 0 auto 2.2rem;
            line-height: 1.7;
            font-weight: 400;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: center;
            gap: 1rem;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            padding: 0.75rem 2rem;
            font-size: 1rem;
            font-weight: 600;
            border-radius: 999px;
            transition: all var(--transition-base);
            border: 2px solid transparent;
            letter-spacing: 0.01em;
        }

        .btn:focus-visible {
            outline: 2px solid var(--brand-primary-light);
            outline-offset: 3px;
        }

        .btn-primary {
            background: var(--brand-primary);
            color: #fff;
            border-color: var(--brand-primary);
            box-shadow: 0 4px 14px rgba(79, 70, 229, 0.35);
        }

        .btn-primary:hover {
            background: var(--brand-primary-dark);
            border-color: var(--brand-primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(79, 70, 229, 0.40);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 10px rgba(79, 70, 229, 0.30);
        }

        .btn-outline-light {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, 0.5);
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: rgba(255, 255, 255, 0.8);
            color: #fff;
            transform: translateY(-2px);
        }

        .btn-outline-light:active {
            transform: translateY(0);
        }

        .hero-stat {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 2rem 3rem;
            margin-top: 3rem;
            padding-top: 2.5rem;
            border-top: 1px solid rgba(255, 255, 255, 0.15);
        }

        .hero-stat-item {
            text-align: center;
            color: rgba(255, 255, 255, 0.9);
        }

        .hero-stat-num {
            font-size: 2rem;
            font-weight: 700;
            line-height: 1.2;
            color: #fff;
        }

        .hero-stat-label {
            font-size: 0.875rem;
            opacity: 0.7;
            margin-top: 0.2rem;
        }

        @media (max-width: 640px) {
            .hero-section {
                min-height: 70vh;
            }
            .hero-content {
                padding: 2rem 1rem;
            }
            .hero-stat {
                gap: 1.2rem 2rem;
                margin-top: 2rem;
                padding-top: 1.5rem;
            }
            .hero-stat-num {
                font-size: 1.5rem;
            }
            .btn {
                padding: 0.6rem 1.5rem;
                font-size: 0.925rem;
            }
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: 5rem 0;
        }

        .section-alt {
            background: var(--bg-soft);
        }

        .section-sm {
            padding: 3rem 0;
        }

        .section-title-wrap {
            text-align: center;
            margin-bottom: 3.5rem;
        }

        .section-label {
            display: inline-block;
            padding: 0.3rem 1.1rem;
            background: rgba(79, 70, 229, 0.08);
            color: var(--brand-primary);
            font-size: 0.85rem;
            font-weight: 600;
            border-radius: 999px;
            margin-bottom: 0.75rem;
            letter-spacing: 0.04em;
        }

        .section-title {
            font-size: clamp(1.8rem, 4vw, 2.6rem);
            font-weight: 800;
            line-height: 1.25;
            color: var(--text-primary);
            margin-bottom: 0.75rem;
        }

        .section-desc {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 640px;
            margin: 0 auto;
            line-height: 1.7;
        }

        @media (max-width: 640px) {
            .section {
                padding: 3rem 0;
            }
            .section-title-wrap {
                margin-bottom: 2rem;
            }
        }

        /* ===== 卡片 ===== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition-base);
            overflow: hidden;
        }

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

        .card-img {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            display: block;
        }

        .card-body {
            padding: 1.5rem;
        }

        .card-title {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            color: var(--text-primary);
            line-height: 1.4;
        }

        .card-text {
            font-size: 0.925rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        .card-tag {
            display: inline-block;
            padding: 0.2rem 0.75rem;
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--brand-primary);
            background: rgba(79, 70, 229, 0.08);
            border-radius: 999px;
            margin-bottom: 0.5rem;
        }

        .card-footer {
            padding: 1rem 1.5rem;
            border-top: 1px solid var(--border-light);
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* ===== 网格 ===== */
        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 2rem;
        }

        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2rem;
        }

        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
        }

        @media (max-width: 1024px) {
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .grid-2,
            .grid-3,
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
                gap: 1.25rem;
            }
        }

        @media (max-width: 520px) {
            .grid-2,
            .grid-3,
            .grid-4 {
                grid-template-columns: 1fr;
                gap: 1rem;
            }
        }

        /* ===== 特色图标卡片 ===== */
        .feature-card {
            text-align: center;
            padding: 2rem 1.5rem;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-light);
            transition: all var(--transition-base);
        }

        .feature-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
            border-color: var(--brand-primary-light);
        }

        .feature-icon {
            width: 60px;
            height: 60px;
            margin: 0 auto 1.25rem;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: #fff;
            background: linear-gradient(135deg, var(--brand-primary), var(--brand-secondary));
            border-radius: 16px;
            box-shadow: 0 8px 24px rgba(79, 70, 229, 0.25);
            transition: transform var(--transition-base);
        }

        .feature-card:hover .feature-icon {
            transform: scale(1.05) rotate(-2deg);
        }

        .feature-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            color: var(--text-primary);
        }

        .feature-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ===== 流程步骤 ===== */
        .step-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
            counter-reset: step;
        }

        .step-item {
            text-align: center;
            padding: 2rem 1.25rem;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-light);
            position: relative;
            transition: all var(--transition-base);
        }

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

        .step-number {
            width: 44px;
            height: 44px;
            margin: 0 auto 1rem;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            background: var(--brand-primary);
            border-radius: 50%;
            box-shadow: 0 6px 20px rgba(79, 70, 229, 0.25);
        }

        .step-item h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 0.4rem;
            color: var(--text-primary);
        }

        .step-item p {
            font-size: 0.875rem;
            color: var(--text-secondary);
            line-height: 1.5;
        }

        .step-connector {
            display: none;
        }

        @media (max-width: 768px) {
            .step-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 1rem;
            }
        }

        @media (max-width: 520px) {
            .step-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color var(--transition-base);
        }

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

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 1.2rem 1.5rem;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            text-align: left;
            background: none;
            border: none;
            cursor: pointer;
            transition: background var(--transition-base);
            gap: 1rem;
        }

        .faq-question:hover {
            background: rgba(0, 0, 0, 0.02);
        }

        .faq-question .icon {
            flex-shrink: 0;
            font-size: 1.1rem;
            color: var(--brand-primary);
            transition: transform var(--transition-base);
        }

        .faq-item.open .faq-question .icon {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 1.5rem;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 1.5rem 1.25rem;
        }

        @media (max-width: 640px) {
            .faq-question {
                padding: 1rem 1.2rem;
                font-size: 0.95rem;
            }
            .faq-answer {
                padding: 0 1.2rem;
                font-size: 0.9rem;
            }
            .faq-item.open .faq-answer {
                padding: 0 1.2rem 1rem;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--brand-primary-dark), var(--brand-primary), var(--brand-secondary));
            color: #fff;
            text-align: center;
            padding: 4.5rem 2rem;
            border-radius: var(--radius-lg);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(circle at 30% 50%, rgba(255, 255, 255, 0.06) 0%, transparent 60%);
            pointer-events: none;
        }

        .cta-section h2 {
            font-size: clamp(1.8rem, 3.5vw, 2.4rem);
            font-weight: 800;
            margin-bottom: 0.75rem;
            position: relative;
        }

        .cta-section p {
            font-size: 1.1rem;
            opacity: 0.9;
            max-width: 560px;
            margin: 0 auto 2rem;
            position: relative;
        }

        .cta-section .btn {
            position: relative;
        }

        .cta-section .btn-outline-light {
            border-color: rgba(255, 255, 255, 0.6);
        }

        .cta-section .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.15);
            border-color: #fff;
        }

        /* ===== 最新资讯列表 ===== */
        .news-list {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }

        .news-item {
            display: flex;
            align-items: center;
            gap: 1.5rem;
            padding: 1.25rem 1.5rem;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            transition: all var(--transition-base);
        }

        .news-item:hover {
            box-shadow: var(--shadow-sm);
            border-color: var(--border-medium);
            transform: translateX(4px);
        }

        .news-item .badge {
            flex-shrink: 0;
            padding: 0.2rem 0.8rem;
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--brand-primary);
            background: rgba(79, 70, 229, 0.08);
            border-radius: 999px;
        }

        .news-item .title {
            flex: 1;
            font-weight: 600;
            font-size: 0.975rem;
            color: var(--text-primary);
            line-height: 1.4;
        }

        .news-item .title a {
            color: inherit;
        }

        .news-item .title a:hover {
            color: var(--brand-primary);
        }

        .news-item .date {
            flex-shrink: 0;
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        @media (max-width: 640px) {
            .news-item {
                flex-wrap: wrap;
                gap: 0.75rem;
                padding: 1rem 1.2rem;
            }
            .news-item .date {
                width: 100%;
                text-align: left;
                font-size: 0.8rem;
            }
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #0f172a;
            color: rgba(255, 255, 255, 0.8);
            padding: 4rem 0 2rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 2.5rem;
            margin-bottom: 3rem;
        }

        .footer-brand .logo-link {
            color: #fff;
            font-size: 1.2rem;
            margin-bottom: 1rem;
            display: inline-flex;
        }

        .footer-brand .logo-link:hover {
            color: #fff;
            opacity: 0.85;
        }

        .footer-brand p {
            font-size: 0.9rem;
            opacity: 0.7;
            line-height: 1.7;
            max-width: 320px;
            margin-top: 0.75rem;
        }

        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 1rem;
        }

        .footer-col ul li {
            margin-bottom: 0.5rem;
        }

        .footer-col ul li a {
            font-size: 0.9rem;
            opacity: 0.7;
            transition: all var(--transition-base);
        }

        .footer-col ul li a:hover {
            opacity: 1;
            color: var(--brand-primary-light);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 1.5rem;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            font-size: 0.85rem;
            opacity: 0.6;
        }

        .footer-bottom a {
            color: inherit;
            opacity: 0.8;
        }

        .footer-bottom a:hover {
            opacity: 1;
            color: var(--brand-primary-light);
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 2rem;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }

        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== 辅助 class ===== */
        .text-center {
            text-align: center;
        }
        .mt-1 { margin-top: 0.5rem; }
        .mt-2 { margin-top: 1rem; }
        .mt-3 { margin-top: 1.5rem; }
        .mt-4 { margin-top: 2rem; }
        .mb-1 { margin-bottom: 0.5rem; }
        .mb-2 { margin-bottom: 1rem; }
        .mb-3 { margin-bottom: 1.5rem; }
        .gap-1 { gap: 0.5rem; }
        .gap-2 { gap: 1rem; }
        .gap-3 { gap: 1.5rem; }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .flex-wrap {
            flex-wrap: wrap;
        }

        /* ===== 空状态 ===== */
        .empty-state {
            text-align: center;
            padding: 2.5rem 1.5rem;
            color: var(--text-muted);
            font-size: 0.95rem;
        }

        .empty-state i {
            font-size: 2.4rem;
            margin-bottom: 0.75rem;
            opacity: 0.4;
            display: block;
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a2a6c;
            --primary-light: #2d4a8c;
            --primary-dark: #0f1a4a;
            --secondary: #f5a623;
            --secondary-light: #f7c35e;
            --accent: #e74c5e;
            --bg-body: #f8faff;
            --bg-card: #ffffff;
            --bg-dark: #0d1b2a;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a6a;
            --text-light: #8888aa;
            --text-white: #ffffff;
            --border-color: #e2e8f0;
            --border-light: #f0f2f7;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 24px;
            --shadow-sm: 0 2px 10px rgba(26,42,108,0.06);
            --shadow-md: 0 8px 30px rgba(26,42,108,0.10);
            --shadow-lg: 0 20px 60px rgba(26,42,108,0.14);
            --shadow-hover: 0 16px 48px rgba(26,42,108,0.18);
            --font-sans: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-sans);
            background: var(--bg-body);
            color: var(--text-primary);
            line-height: 1.7;
            font-size: 16px;
        }
        a { color: inherit; text-decoration: none; transition: var(--transition); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        button { cursor: pointer; font-family: inherit; border: none; background: none; }
        input, textarea { font-family: inherit; outline: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text-primary); }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

        /* ===== Header & Nav ===== */
        .site-header {
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-light);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 2px 20px rgba(0,0,0,0.04);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 12px 0;
            gap: 16px;
        }
        .nav-left, .nav-right {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-left .nav-item, .nav-right .nav-item {
            padding: 8px 18px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 30px;
            transition: var(--transition);
            letter-spacing: 0.3px;
        }
        .nav-left .nav-item:hover, .nav-right .nav-item:hover {
            color: var(--primary);
            background: rgba(26,42,108,0.06);
        }
        .nav-left .nav-item.active, .nav-right .nav-item.active {
            color: var(--primary);
            background: rgba(26,42,108,0.10);
            font-weight: 600;
        }
        .logo-wrap {
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }
        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.3px;
        }
        .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            border-radius: 12px;
            font-size: 18px;
            box-shadow: 0 4px 12px rgba(26,42,108,0.25);
        }
        .menu-toggle {
            display: none;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--primary);
            border-radius: 12px;
            background: rgba(26,42,108,0.05);
            transition: var(--transition);
        }
        .menu-toggle:hover { background: rgba(26,42,108,0.10); }
        .mobile-nav {
            display: none;
            flex-direction: column;
            padding: 16px 24px 24px;
            gap: 8px;
            background: rgba(255,255,255,0.98);
            border-top: 1px solid var(--border-light);
        }
        .mobile-nav .nav-item {
            padding: 12px 18px;
            font-size: 16px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .mobile-nav .nav-item:hover { background: rgba(26,42,108,0.06); color: var(--primary); }
        .mobile-nav .nav-item.active { background: rgba(26,42,108,0.10); color: var(--primary); font-weight: 600; }

        /* ===== Article Hero ===== */
        .article-hero {
            position: relative;
            padding: 80px 0 60px;
            background: linear-gradient(135deg, var(--primary-dark), var(--primary), var(--primary-light));
            overflow: hidden;
            min-height: 320px;
            display: flex;
            align-items: center;
        }
        .article-hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: 0.15;
            mix-blend-mode: overlay;
        }
        .article-hero-content {
            position: relative;
            z-index: 2;
            max-width: 820px;
            margin: 0 auto;
            text-align: center;
            color: var(--text-white);
        }
        .article-hero .category-badge {
            display: inline-block;
            padding: 6px 20px;
            background: rgba(255,255,255,0.18);
            backdrop-filter: blur(4px);
            border-radius: 30px;
            font-size: 13px;
            font-weight: 600;
            color: #fff;
            letter-spacing: 1px;
            margin-bottom: 20px;
            border: 1px solid rgba(255,255,255,0.20);
        }
        .article-hero h1 {
            font-size: clamp(28px, 4.2vw, 48px);
            color: #fff;
            line-height: 1.25;
            margin-bottom: 20px;
            text-shadow: 0 2px 20px rgba(0,0,0,0.15);
        }
        .article-hero .meta-row {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 24px;
            font-size: 14px;
            color: rgba(255,255,255,0.80);
        }
        .article-hero .meta-row span {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-hero .meta-row i { font-size: 14px; opacity: 0.7; }

        /* ===== Article Content ===== */
        .article-section {
            padding: 60px 0 80px;
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 48px;
        }
        .article-main {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            padding: 40px 44px;
            border: 1px solid var(--border-light);
        }
        .article-body {
            font-size: 16.5px;
            line-height: 1.9;
            color: var(--text-primary);
        }
        .article-body h2 {
            font-size: 24px;
            margin: 36px 0 16px;
            color: var(--primary);
            padding-bottom: 10px;
            border-bottom: 2px solid var(--border-light);
        }
        .article-body h3 {
            font-size: 20px;
            margin: 28px 0 12px;
            color: var(--primary-light);
        }
        .article-body p {
            margin-bottom: 18px;
            color: var(--text-secondary);
        }
        .article-body ul, .article-body ol {
            margin: 16px 0 20px;
            padding-left: 24px;
            color: var(--text-secondary);
        }
        .article-body ul { list-style: disc; }
        .article-body ol { list-style: decimal; }
        .article-body li { margin-bottom: 8px; }
        .article-body blockquote {
            margin: 24px 0;
            padding: 20px 28px;
            background: rgba(26,42,108,0.04);
            border-left: 4px solid var(--secondary);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-body a { color: var(--primary-light); text-decoration: underline; }
        .article-body a:hover { color: var(--primary); }
        .article-body img {
            margin: 24px 0;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
        }
        .article-body code {
            background: rgba(26,42,108,0.06);
            padding: 2px 10px;
            border-radius: 6px;
            font-size: 14px;
            color: var(--accent);
        }
        .article-body pre {
            background: var(--bg-dark);
            color: #e8e8f0;
            padding: 24px 28px;
            border-radius: var(--radius-md);
            overflow-x: auto;
            margin: 24px 0;
            font-size: 14px;
            line-height: 1.6;
        }
        .article-body pre code { background: none; color: inherit; padding: 0; }

        /* ===== Sidebar ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }
        .sidebar-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            padding: 28px;
            border: 1px solid var(--border-light);
        }
        .sidebar-card h3 {
            font-size: 17px;
            color: var(--primary);
            margin-bottom: 16px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--border-light);
        }
        .sidebar-card ul li {
            padding: 8px 0;
            border-bottom: 1px solid var(--border-light);
        }
        .sidebar-card ul li:last-child { border-bottom: none; }
        .sidebar-card ul li a {
            color: var(--text-secondary);
            font-size: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition);
        }
        .sidebar-card ul li a:hover { color: var(--primary); padding-left: 4px; }
        .sidebar-card ul li a i { color: var(--secondary); font-size: 12px; }

        /* ===== Related Articles ===== */
        .related-section {
            padding: 60px 0;
            background: var(--bg-card);
            border-top: 1px solid var(--border-light);
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
            margin-top: 32px;
        }
        .related-card {
            background: var(--bg-body);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .related-card .card-img {
            height: 180px;
            background-size: cover;
            background-position: center;
            position: relative;
        }
        .related-card .card-img .overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(0,0,0,0.40), transparent);
        }
        .related-card .card-body {
            padding: 20px 22px 24px;
        }
        .related-card .card-body h4 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-body h4 a { color: var(--text-primary); }
        .related-card .card-body h4 a:hover { color: var(--primary); }
        .related-card .card-body .meta {
            font-size: 13px;
            color: var(--text-light);
            display: flex;
            gap: 14px;
        }
        .related-card .card-body .meta i { font-size: 12px; }

        /* ===== CTA ===== */
        .cta-section {
            padding: 70px 0;
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            text-align: center;
            color: #fff;
        }
        .cta-section h2 {
            font-size: clamp(24px, 3vw, 36px);
            color: #fff;
            margin-bottom: 12px;
        }
        .cta-section p {
            color: rgba(255,255,255,0.80);
            max-width: 600px;
            margin: 0 auto 28px;
            font-size: 16px;
        }
        .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 38px;
            background: var(--secondary);
            color: var(--primary-dark);
            font-weight: 700;
            font-size: 16px;
            border-radius: 50px;
            transition: var(--transition);
            box-shadow: 0 8px 30px rgba(245,166,35,0.35);
        }
        .cta-btn:hover {
            background: var(--secondary-light);
            transform: translateY(-2px);
            box-shadow: 0 12px 40px rgba(245,166,35,0.45);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.75);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .footer-brand .logo-link {
            color: #fff;
            font-size: 20px;
            margin-bottom: 16px;
        }
        .footer-brand .logo-link .logo-icon {
            width: 36px;
            height: 36px;
            font-size: 16px;
        }
        .footer-brand p {
            font-size: 14px;
            color: rgba(255,255,255,0.60);
            margin-top: 12px;
            max-width: 320px;
            line-height: 1.7;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 18px;
            letter-spacing: 0.5px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            font-size: 14px;
            color: rgba(255,255,255,0.60);
            transition: var(--transition);
        }
        .footer-col ul li a:hover { color: var(--secondary); padding-left: 4px; }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            padding: 24px 0;
            font-size: 13px;
            color: rgba(255,255,255,0.45);
            gap: 12px;
        }
        .footer-bottom a {
            color: rgba(255,255,255,0.55);
            transition: var(--transition);
        }
        .footer-bottom a:hover { color: var(--secondary); }

        /* ===== Not Found ===== */
        .not-found-wrap {
            text-align: center;
            padding: 80px 24px;
        }
        .not-found-wrap .icon-big {
            font-size: 72px;
            color: var(--text-light);
            margin-bottom: 24px;
        }
        .not-found-wrap h2 {
            font-size: 28px;
            color: var(--text-primary);
            margin-bottom: 12px;
        }
        .not-found-wrap p {
            color: var(--text-secondary);
            margin-bottom: 28px;
        }
        .not-found-wrap .back-home {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            background: var(--primary);
            color: #fff;
            border-radius: 50px;
            font-weight: 600;
            transition: var(--transition);
        }
        .not-found-wrap .back-home:hover { background: var(--primary-light); transform: translateY(-2px); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-layout { grid-template-columns: 1fr; }
            .related-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .nav-left, .nav-right { display: none; }
            .menu-toggle { display: flex; }
            .mobile-nav.open { display: flex; }
            .article-main { padding: 28px 20px; }
            .article-hero { padding: 56px 0 44px; min-height: 240px; }
            .article-hero h1 { font-size: 24px; }
            .article-hero .meta-row { gap: 14px; font-size: 13px; flex-wrap: wrap; }
            .related-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 32px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .sidebar-card { padding: 20px; }
        }
        @media (max-width: 520px) {
            .header-inner { padding: 10px 0; }
            .logo-link { font-size: 18px; }
            .logo-icon { width: 34px; height: 34px; font-size: 15px; }
            .article-main { padding: 20px 16px; border-radius: var(--radius-md); }
            .article-body { font-size: 15px; }
            .article-body h2 { font-size: 20px; }
            .article-body h3 { font-size: 18px; }
            .cta-section { padding: 50px 0; }
            .cta-btn { padding: 12px 28px; font-size: 15px; }
            .related-card .card-img { height: 150px; }
        }

        /* Smooth fade-in for images */
        .lazy-fade { opacity: 0; transition: opacity 0.5s ease; }
        .lazy-fade.loaded { opacity: 1; }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a237e;
            --primary-light: #3f51b5;
            --primary-dark: #0d1452;
            --accent: #ff6f00;
            --accent-light: #ffa040;
            --bg-light: #f8f9fc;
            --bg-white: #ffffff;
            --text-dark: #1a1a2e;
            --text-body: #33364d;
            --text-muted: #7a7d99;
            --border-light: #e8eaf0;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-lg: 24px;
            --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.10);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* ===== 基础 Reset ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            margin: 0;
            padding: 0;
            background: var(--bg-light);
            color: var(--text-body);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            outline: none;
        }
        ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        /* ===== 容器 ===== */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== Header / 导航 ===== */
        .site-header {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-light);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 16px rgba(0, 0, 0, 0.04);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 16px;
        }
        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-item {
            padding: 8px 18px;
            border-radius: 40px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-muted);
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-item:hover {
            color: var(--primary);
            background: rgba(26, 35, 126, 0.06);
        }
        .nav-item.active {
            color: var(--bg-white);
            background: var(--primary);
            box-shadow: 0 4px 12px rgba(26, 35, 126, 0.25);
        }
        .nav-item.active:hover {
            background: var(--primary-light);
            color: var(--bg-white);
        }
        .logo-wrap {
            flex-shrink: 0;
        }
        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.3px;
        }
        .logo-icon {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.2rem;
            box-shadow: 0 4px 12px rgba(26, 35, 126, 0.25);
        }
        .menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.6rem;
            color: var(--text-dark);
            cursor: pointer;
            padding: 8px;
            border-radius: 8px;
            transition: var(--transition);
        }
        .menu-toggle:hover {
            background: rgba(0, 0, 0, 0.05);
        }
        .mobile-nav {
            display: none;
            flex-direction: column;
            gap: 4px;
            padding: 16px 24px 24px;
            background: var(--bg-white);
            border-top: 1px solid var(--border-light);
        }
        .mobile-nav .nav-item {
            padding: 12px 16px;
            border-radius: 12px;
            font-size: 1.05rem;
        }
        @media (max-width: 868px) {
            .nav-left,
            .nav-right {
                display: none;
            }
            .menu-toggle {
                display: block;
            }
            .mobile-nav.open {
                display: flex;
            }
            .header-inner {
                height: 64px;
            }
            .logo-link {
                font-size: 1.2rem;
            }
            .logo-icon {
                width: 34px;
                height: 34px;
                font-size: 1rem;
            }
        }
        @media (min-width: 869px) {
            .mobile-nav {
                display: none !important;
            }
        }

        /* ===== Banner / 页面标题 ===== */
        .page-banner {
            position: relative;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
            padding: 80px 0 72px;
            overflow: hidden;
            min-height: 280px;
            display: flex;
            align-items: center;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.15;
            mix-blend-mode: overlay;
        }
        .page-banner .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .page-banner h1 {
            font-size: 3rem;
            font-weight: 800;
            color: #fff;
            margin: 0 0 16px;
            letter-spacing: -0.5px;
            line-height: 1.2;
        }
        .page-banner p {
            font-size: 1.2rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 640px;
            margin: 0 auto;
            line-height: 1.6;
        }
        .page-banner .breadcrumb {
            display: flex;
            justify-content: center;
            gap: 8px;
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 20px;
        }
        .page-banner .breadcrumb a {
            color: rgba(255, 255, 255, 0.8);
        }
        .page-banner .breadcrumb a:hover {
            color: #fff;
        }
        .page-banner .breadcrumb span {
            color: rgba(255, 255, 255, 0.5);
        }
        @media (max-width: 768px) {
            .page-banner {
                padding: 60px 0 48px;
                min-height: 220px;
            }
            .page-banner h1 {
                font-size: 2rem;
            }
            .page-banner p {
                font-size: 1rem;
            }
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--bg-white);
        }
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-dark);
            margin: 0 0 12px;
            letter-spacing: -0.3px;
            line-height: 1.3;
        }
        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-muted);
            max-width: 580px;
            margin: 0 auto 48px;
            line-height: 1.6;
        }
        .text-center {
            text-align: center;
        }
        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .section-subtitle {
                font-size: 1rem;
                margin-bottom: 32px;
            }
        }

        /* ===== 登录方式卡片 ===== */
        .login-methods-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .method-card {
            background: var(--bg-white);
            border-radius: var(--radius);
            padding: 36px 24px 32px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .method-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: var(--primary-light);
        }
        .method-icon {
            width: 64px;
            height: 64px;
            margin: 0 auto 20px;
            background: linear-gradient(135deg, rgba(26, 35, 126, 0.08), rgba(63, 81, 181, 0.12));
            border-radius: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            color: var(--primary);
            transition: var(--transition);
        }
        .method-card:hover .method-icon {
            background: var(--primary);
            color: #fff;
            transform: scale(1.05);
        }
        .method-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-dark);
            margin: 0 0 8px;
        }
        .method-card p {
            font-size: 0.95rem;
            color: var(--text-muted);
            margin: 0;
            line-height: 1.6;
        }
        .method-badge {
            display: inline-block;
            margin-top: 14px;
            padding: 4px 14px;
            border-radius: 40px;
            font-size: 0.8rem;
            font-weight: 600;
            background: rgba(255, 111, 0, 0.12);
            color: var(--accent);
        }
        @media (max-width: 1024px) {
            .login-methods-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 560px) {
            .login-methods-grid {
                grid-template-columns: 1fr;
            }
            .method-card {
                padding: 28px 20px 24px;
            }
        }

        /* ===== 步骤流程 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            counter-reset: step;
        }
        .step-item {
            background: var(--bg-white);
            border-radius: var(--radius);
            padding: 32px 24px 28px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            position: relative;
            transition: var(--transition);
        }
        .step-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .step-number {
            width: 44px;
            height: 44px;
            margin: 0 auto 16px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            font-weight: 700;
            box-shadow: 0 4px 12px rgba(26, 35, 126, 0.25);
        }
        .step-item h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-dark);
            margin: 0 0 8px;
        }
        .step-item p {
            font-size: 0.92rem;
            color: var(--text-muted);
            margin: 0;
            line-height: 1.6;
        }
        .step-arrow {
            position: absolute;
            right: -14px;
            top: 50%;
            transform: translateY(-50%);
            font-size: 1.6rem;
            color: var(--primary-light);
            opacity: 0.3;
        }
        .steps-grid .step-item:last-child .step-arrow {
            display: none;
        }
        @media (max-width: 1024px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .step-arrow {
                display: none;
            }
        }
        @media (max-width: 560px) {
            .steps-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 安全提示 ===== */
        .security-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .security-card {
            background: var(--bg-white);
            border-radius: var(--radius);
            padding: 32px 24px;
            display: flex;
            gap: 18px;
            align-items: flex-start;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .security-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .security-icon {
            flex-shrink: 0;
            width: 48px;
            height: 48px;
            background: rgba(26, 35, 126, 0.08);
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--primary);
        }
        .security-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-dark);
            margin: 0 0 6px;
        }
        .security-card p {
            font-size: 0.92rem;
            color: var(--text-muted);
            margin: 0;
            line-height: 1.6;
        }
        @media (max-width: 868px) {
            .security-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 560px) {
            .security-grid {
                grid-template-columns: 1fr;
            }
            .security-card {
                padding: 24px 18px;
            }
        }

        /* ===== 内容区块（图文） ===== */
        .content-row {
            display: flex;
            align-items: center;
            gap: 60px;
        }
        .content-row.reverse {
            flex-direction: row-reverse;
        }
        .content-text {
            flex: 1;
        }
        .content-text h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--text-dark);
            margin: 0 0 16px;
            line-height: 1.3;
        }
        .content-text p {
            font-size: 1.05rem;
            color: var(--text-body);
            margin: 0 0 18px;
            line-height: 1.7;
        }
        .content-text ul {
            padding: 0;
            margin: 0 0 20px;
        }
        .content-text ul li {
            position: relative;
            padding-left: 28px;
            margin-bottom: 10px;
            font-size: 1rem;
            color: var(--text-body);
        }
        .content-text ul li::before {
            content: '\f00c';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            position: absolute;
            left: 0;
            top: 2px;
            color: var(--primary);
            font-size: 0.9rem;
        }
        .content-image {
            flex: 1;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            background: var(--border-light);
        }
        .content-image img {
            width: 100%;
            height: 380px;
            object-fit: cover;
            display: block;
        }
        @media (max-width: 868px) {
            .content-row,
            .content-row.reverse {
                flex-direction: column;
                gap: 32px;
            }
            .content-text h2 {
                font-size: 1.4rem;
            }
            .content-image img {
                height: 240px;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary-light);
        }
        .faq-question {
            width: 100%;
            background: none;
            border: none;
            padding: 20px 24px;
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-dark);
            text-align: left;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            transition: var(--transition);
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question .faq-toggle {
            font-size: 1.2rem;
            color: var(--text-muted);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question .faq-toggle {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-muted);
            font-size: 0.98rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }
        @media (max-width: 768px) {
            .faq-question {
                padding: 16px 18px;
                font-size: 0.98rem;
            }
            .faq-answer {
                padding: 0 18px;
                font-size: 0.92rem;
            }
            .faq-item.open .faq-answer {
                padding: 0 18px 16px;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
            padding: 80px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: 2.2rem;
            font-weight: 800;
            color: #fff;
            margin: 0 0 16px;
            letter-spacing: -0.3px;
        }
        .cta-section p {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 540px;
            margin: 0 auto 32px;
        }
        .btn-cta {
            display: inline-block;
            padding: 16px 48px;
            border-radius: 50px;
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--primary);
            background: #fff;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
        }
        .btn-cta:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
            background: var(--accent-light);
            color: #fff;
        }
        .btn-cta:focus-visible {
            outline: 3px solid rgba(255, 255, 255, 0.6);
            outline-offset: 4px;
        }
        @media (max-width: 768px) {
            .cta-section {
                padding: 56px 0;
            }
            .cta-section h2 {
                font-size: 1.6rem;
            }
            .cta-section p {
                font-size: 1rem;
            }
            .btn-cta {
                padding: 14px 36px;
                font-size: 1rem;
            }
        }

        /* ===== 标签 / 徽章 ===== */
        .tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 40px;
            font-size: 0.8rem;
            font-weight: 600;
            background: rgba(26, 35, 126, 0.08);
            color: var(--primary);
        }
        .tag-accent {
            background: rgba(255, 111, 0, 0.12);
            color: var(--accent);
        }
        .tag-success {
            background: rgba(16, 185, 129, 0.12);
            color: #10b981;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--text-dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand .logo-link {
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-brand .logo-icon {
            background: linear-gradient(135deg, #fff, rgba(255, 255, 255, 0.7));
            color: var(--primary);
        }
        .footer-brand p {
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.6);
            margin: 16px 0 0;
            line-height: 1.7;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin: 0 0 16px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            font-size: 0.92rem;
            color: rgba(255, 255, 255, 0.6);
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 24px 0;
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.45);
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.55);
        }
        .footer-bottom a:hover {
            color: #fff;
        }
        @media (max-width: 868px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            .footer-brand p {
                max-width: 100%;
            }
        }
        @media (max-width: 560px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== 响应式辅助 ===== */
        @media (max-width: 520px) {
            .page-banner h1 {
                font-size: 1.7rem;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .btn-cta {
                width: 100%;
                text-align: center;
            }
        }

        /* ===== 焦点可见性 ===== */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 3px solid var(--primary-light);
            outline-offset: 2px;
            border-radius: 4px;
        }

        /* ===== 平滑过渡 ===== */
        .fade-in {
            opacity: 0;
            transform: translateY(20px);
            animation: fadeInUp 0.6s ease forwards;
        }
        @keyframes fadeInUp {
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }