/* 由 ks100\mobile-guide-disable-lock.html 内联 <style> 整体外置（步骤⑩方案A，2026-08-06）
   规则原样迁移，零改写，视觉零回归。 */


        /* ===== Image Modal ===== */
        #image-modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.95);
            z-index: var(--z-toast);
            justify-content: center;
            align-items: center;
            touch-action: none;
            -webkit-user-select: none;
            user-select: none;
            overflow: hidden;
        }
        #modal-image-container {
            width: 100%;
            height: 100%;
            display: flex;
            justify-content: center;
            align-items: center;
            position: relative;
            overflow: hidden;
        }
        #modal-image {
            max-width: 100%;
            max-height: 100%;
            object-fit: contain;
            transform-origin: center center;
            transition: transform 0.25s ease;
            -webkit-user-drag: none;
            user-select: none;
            -webkit-user-select: none;
            will-change: transform;
        }
        #modal-image.zooming {
            transition: none;
        }
        #modal-close {
            position: absolute;
            top: 15px;
            right: 15px;
            width: 40px;
            height: 40px;
            background-color: rgba(255, 255, 255, 0.2);
            border: none;
            border-radius: 50%;
            color: #fff;
            font-size: 24px;
            cursor: pointer;
            z-index: var(--z-lightbox);
            display: flex;
            justify-content: center;
            align-items: center;
        }
        #modal-dots {
            position: absolute;
            bottom: 24px;
            left: 50%;
            transform: translateX(-50%);
            display: flex;
            gap: 8px;
            z-index: var(--z-lightbox);
        }
        .modal-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background-color: rgba(255, 255, 255, 0.35);
            cursor: pointer;
            transition: all 0.3s ease;
        }
        .modal-dot.active {
            width: 20px;
            border-radius: 4px;
            background-color: #4285F4;
        }
    


        /* 修复页眉菜单上方空白 */
        .ks100-nav a {
            line-height: 56px !important;
        }

        /* 桌面端隐藏 #image-modal，使用 .global-lightbox */
        @media (min-width: 769px) {
            #image-modal {
                display: none !important;
            }
        }

        /* ===== 桌面端 ===== */
        @media (min-width: 769px) {
            body {
                margin: 0 !important;
                padding: 0 !important;
                background: var(--bg-page-gradient);
                font-family: var(--font-sans);
                color: var(--guide-ink);
                -webkit-font-smoothing: antialiased;
            }

            header {
                height: 56px !important;
                margin-bottom: 0 !important;
                box-shadow: 0 1px 0 rgba(0,0,0,0.06) !important;
                padding: 0 !important;
                background: rgba(255,255,255,0.85) !important;
                backdrop-filter: saturate(180%) blur(20px);
                position: sticky !important;
                top: 0;
                z-index: var(--z-nav-dropdown);
            }

            main {
                padding-top: 0 !important;
            }

            .ks100-nav ul li a {
                line-height: 56px !important;
                font-size: 15px;
                color: #333;
                text-decoration: none;
                transition: color 0.2s ease;
            }
            .ks100-nav ul li a:hover {
                color: var(--guide-blue);
            }

            /* 隐藏旧的桌面端容器样式 */
            .desktop-content > div[style*="width: 1200px"] {
                display: none;
            }

            /* ===== 桌面端 Hero ===== */
            .pairing-hero {
                position: relative;
                padding: 80px 60px 70px;
                background: var(--bg-page-gradient);
                border-bottom: 1px solid rgba(25, 118, 210, 0.08);
                overflow: hidden;
            }
            .pairing-hero::before {
                content: "";
                position: absolute;
                top: -120px;
                right: -80px;
                width: 480px;
                height: 480px;
                background: radial-gradient(circle, rgba(66,133,244,0.18) 0%, transparent 70%);
                border-radius: 50%;
                pointer-events: none;
            }
            .pairing-hero::after {
                content: "";
                position: absolute;
                bottom: -160px;
                left: -100px;
                width: 400px;
                height: 400px;
                background: radial-gradient(circle, rgba(25,118,210,0.1) 0%, transparent 70%);
                border-radius: 50%;
                pointer-events: none;
            }
            .pairing-hero-inner {
                max-width: 1200px;
                margin: 0 auto;
                position: relative;
                z-index: var(--z-content);
                display: grid;
                grid-template-columns: 1.8fr 1fr;
                gap: 80px;
                align-items: center;
            }
            .pairing-hero-meta {
                display: flex;
                align-items: center;
                gap: 14px;
                margin-bottom: 20px;
                font-size: 13px;
                font-weight: 700;
                letter-spacing: 4px;
                color: var(--guide-blue);
                text-transform: uppercase;
            }
            .pairing-hero-meta-line {
                flex: 0 0 40px;
                height: 2px;
                background: var(--guide-blue);
                opacity: 0.3;
            }
            .pairing-hero-eyebrow {
                color: var(--guide-blue);
                font-weight: 700;
            }
            .pairing-hero h1 {
                font-size: clamp(40px, 5vw, 56px);
                font-weight: 800;
                line-height: 1.15;
                color: var(--guide-ink);
                margin: 0 0 18px;
                letter-spacing: -1px;
            }
            .pairing-hero h1 em {
                font-style: normal;
                font-weight: 800;
                background: linear-gradient(135deg, #1976D2 0%, #4285F4 100%);
                -webkit-background-clip: text;
                -webkit-text-fill-color: transparent;
                background-clip: text;
            }
            .pairing-hero-lead {
                font-size: 17px;
                line-height: 1.75;
                color: var(--guide-muted);
                max-width: 600px;
                margin: 0;
                font-weight: 400;
            }
            .pairing-hero-aside {
                display: flex;
                flex-direction: column;
                gap: 16px;
            }
            .pairing-hero-back-btn {
                display: inline-flex;
                align-items: center;
                gap: 10px;
                padding: 14px 28px;
                background: linear-gradient(135deg, #1976D2, #4285F4);
                color: #fff;
                font-size: 15px;
                font-weight: 600;
                text-decoration: none;
                border-radius: 12px;
                box-shadow: 0 4px 14px rgba(25, 118, 210, 0.3);
                transition: transform 0.3s ease, box-shadow 0.3s ease;
            }
            .pairing-hero-back-btn:hover {
                transform: translateY(-2px);
                box-shadow: 0 8px 24px rgba(25, 118, 210, 0.35);
            }
            .pairing-hero-back-btn svg {
                width: 18px;
                height: 18px;
            }
            .pairing-hero-info {
                display: flex;
                flex-direction: column;
                gap: 12px;
                padding: 20px 22px;
                background: rgba(255, 255, 255, 0.7);
                border: 1px solid rgba(25, 118, 210, 0.1);
                border-radius: 12px;
                backdrop-filter: blur(10px);
            }
            .pairing-hero-info-row {
                display: flex;
                align-items: center;
                justify-content: space-between;
            }
            .pairing-hero-info-label {
                font-size: 13px;
                color: var(--guide-muted);
                font-weight: 500;
            }
            .pairing-hero-info-value {
                font-size: 15px;
                font-weight: 600;
                color: var(--guide-ink);
            }

            /* ===== 内容切换器 ===== */
            .pairing-toggle-wrap {
                max-width: 1800px;
                margin: 0 auto;
                display: flex;
                align-items: center;
                justify-content: space-between;
                padding: 24px 60px;
                background: var(--guide-surface-alt);
                border-bottom: none;
            }
            .pairing-toggle-crumbs {
                font-size: 13px;
                font-weight: 500;
                color: var(--guide-muted);
                display: flex;
                align-items: center;
                gap: 10px;
            }
            .pairing-toggle-crumbs .dot {
                width: 8px;
                height: 8px;
                border-radius: 50%;
                background: var(--guide-blue);
                box-shadow: 0 0 0 4px var(--guide-blue-light);
            }
            .pairing-crumb-link {
                color: var(--guide-muted);
                text-decoration: none;
                font-weight: 500;
                transition: color 0.2s ease;
            }
            .pairing-crumb-link:hover {
                color: var(--guide-blue);
                text-decoration: underline;
            }
            .pairing-view-toggle {
                display: inline-flex;
                align-items: center;
                background: var(--guide-surface-card);
                border: 1px solid var(--guide-line);
                border-radius: 999px;
                padding: 4px;
                position: relative;
                cursor: pointer;
                user-select: none;
                gap: 0;
                box-shadow: 0 2px 8px rgba(0,0,0,0.04);
            }
            .pairing-view-option {
                position: relative;
                z-index: var(--z-content-high);
                display: inline-flex;
                align-items: center;
                gap: 8px;
                padding: 9px 28px;
                font-size: 13px;
                font-weight: 500;
                color: var(--guide-muted);
                border-radius: 999px;
                transition: color 0.3s ease;
                cursor: pointer;
            }
            .pairing-view-option.active {
                color: #FFFFFF !important;
                font-weight: 600;
            }
            .pairing-view-thumb {
                position: absolute;
                top: 4px;
                left: 4px;
                height: calc(100% - 8px);
                background: linear-gradient(135deg, #1976D2, #4285F4);
                border-radius: 999px;
                transition: transform 0.4s cubic-bezier(0.65, 0, 0.35, 1), width 0.4s cubic-bezier(0.65, 0, 0.35, 1);
                z-index: var(--z-content);
                box-shadow: 0 4px 14px rgba(25, 118, 210, 0.3);
            }
            .pairing-view-option svg {
                width: 16px;
                height: 16px;
                flex-shrink: 0;
            }

            /* ===== 桌面端内容区域 ===== */
            .pairing-content {
                padding: 80px 60px 100px;
                background: var(--guide-surface-alt);
            }
            .pairing-content-inner {
                max-width: 1200px;
                margin: 0 auto;
            }
            .pairing-card {
                position: relative;
                background: var(--guide-surface);
                border-radius: 20px;
                padding: 40px;
                border: 1px solid var(--guide-line);
                box-shadow: 0 4px 24px rgba(25, 118, 210, 0.04);
                transition: box-shadow 0.4s ease, transform 0.4s ease;
            }
            .pairing-card:hover {
                box-shadow: 0 12px 40px rgba(25, 118, 210, 0.1);
                transform: translateY(-2px);
            }
            .pairing-card-header {
                display: flex;
                align-items: flex-end;
                justify-content: space-between;
                padding-bottom: 24px;
                margin-bottom: 32px;
                border-bottom: 1px solid var(--guide-line);
            }
            .pairing-card-title-wrap {
                flex: 1;
            }
            .pairing-card-tag {
                font-size: 12px;
                font-weight: 700;
                letter-spacing: 2px;
                text-transform: uppercase;
                color: var(--guide-blue);
                margin-bottom: 10px;
                display: block;
            }
            .pairing-card-title {
                font-size: 32px;
                font-weight: 800;
                color: var(--guide-ink);
                margin: 0;
                line-height: 1.2;
                letter-spacing: -0.3px;
            }
            .pairing-card-step {
                font-size: 48px;
                font-weight: 800;
                color: var(--guide-blue);
                opacity: 0.15;
                line-height: 1;
                margin-left: 16px;
                font-variant-numeric: tabular-nums;
            }

            /* ===== 轮播区域 ===== */
            .pairing-carousel-wrap {
                position: relative;
                width: 100%;
                aspect-ratio: 16 / 10;
                background: var(--guide-surface-card);
                border-radius: 16px;
                overflow: hidden;
                border: 1px solid var(--guide-line);
            }
            .pairing-carousel {
                display: flex;
                transition: transform 500ms cubic-bezier(0.65, 0, 0.35, 1);
                height: 100%;
                width: 100%;
            }
            .pairing-carousel-slide {
                min-width: 100%;
                height: 100%;
                display: flex;
                align-items: center;
                justify-content: center;
                background: var(--guide-surface-card);
            }
            .pairing-carousel-slide img {
                max-width: 90%;
                max-height: 90%;
                object-fit: contain;
                border-radius: 8px;
            }
            .pairing-carousel-btn {
                position: absolute;
                top: 50%;
                transform: translateY(-50%);
                width: 48px;
                height: 48px;
                background: rgba(255, 255, 255, 0.9);
                color: var(--guide-ink);
                border: 1px solid var(--guide-line);
                border-radius: 50%;
                font-size: 20px;
                cursor: pointer;
                z-index: var(--z-card);
                display: flex;
                align-items: center;
                justify-content: center;
                transition: all 0.25s ease;
                box-shadow: 0 2px 8px rgba(0,0,0,0.08);
            }
            .pairing-carousel-btn:hover {
                background: var(--guide-blue);
                color: #fff;
                border-color: var(--guide-blue);
                transform: translateY(-50%) scale(1.1);
                box-shadow: 0 4px 16px rgba(25, 118, 210, 0.3);
            }
            .pairing-carousel-btn.prev {
                left: 20px;
            }
            .pairing-carousel-btn.next {
                right: 20px;
            }
            .pairing-carousel-dots {
                position: absolute;
                bottom: 20px;
                left: 50%;
                transform: translateX(-50%);
                display: flex;
                gap: 8px;
                z-index: var(--z-card);
            }
            .pairing-carousel-dot {
                width: 8px;
                height: 8px;
                border-radius: 50%;
                background: var(--guide-faint);
                opacity: 0.5;
                cursor: pointer;
                transition: all 0.3s ease;
            }
            .pairing-carousel-dot.active {
                background: var(--guide-blue);
                opacity: 1;
                width: 24px;
                border-radius: 4px;
            }

            /* ===== 视频区域 ===== */
            .pairing-video-wrap {
                position: relative;
                width: 100%;
                aspect-ratio: 16 / 9;
                background: var(--guide-surface-card);
                border-radius: 16px;
                overflow: hidden;
                border: 1px solid var(--guide-line);
                display: flex;
                align-items: center;
                justify-content: center;
            }
            .pairing-video-placeholder {
                font-size: 18px;
                color: var(--guide-muted);
                font-weight: 500;
            }

            /* ===== 步骤说明列表 ===== */
            .pairing-steps {
                margin-top: 40px;
                display: grid;
                grid-template-columns: repeat(3, 1fr);
                gap: 20px;
            }
            .pairing-step-item {
                position: relative;
                padding: 24px;
                background: var(--guide-surface-card);
                border: 2px solid var(--guide-line);
                border-radius: 14px;
                transition: all 0.3s ease;
                cursor: pointer;
            }
            .pairing-step-item:hover {
                border-color: var(--guide-blue);
                transform: translateY(-2px);
                box-shadow: 0 8px 24px rgba(25, 118, 210, 0.08);
                animation: stepWobble 0.6s ease-in-out;
            }
            .pairing-step-item.active {
                border-color: var(--guide-blue);
                background: linear-gradient(135deg, rgba(25, 118, 210, 0.06) 0%, rgba(66, 133, 244, 0.04) 100%);
                box-shadow: 0 8px 28px rgba(25, 118, 210, 0.15);
                transform: translateY(-3px);
            }
            .pairing-step-item.active::before {
                content: "";
                position: absolute;
                top: -1px;
                left: -1px;
                right: -1px;
                bottom: -1px;
                border-radius: 14px;
                padding: 2px;
                background: linear-gradient(135deg, #1976D2, #4285F4);
                -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
                -webkit-mask-composite: xor;
                mask-composite: exclude;
                pointer-events: none;
            }
            .pairing-step-item.active::after {
                content: "当前步骤";
                position: absolute;
                top: -10px;
                right: 16px;
                padding: 4px 12px;
                background: linear-gradient(135deg, #1976D2, #4285F4);
                color: #fff;
                font-size: 11px;
                font-weight: 600;
                border-radius: 999px;
                box-shadow: 0 4px 12px rgba(25, 118, 210, 0.3);
            }
            .pairing-step-item.active .pairing-step-num {
                transform: scale(1.1);
                box-shadow: 0 4px 14px rgba(25, 118, 210, 0.4);
            }
            .pairing-step-item.active .pairing-step-title {
                color: var(--guide-blue);
            }

            @keyframes stepWobble {
                0% { transform: translateY(-2px) rotate(0deg); }
                20% { transform: translateY(-2px) rotate(-2deg); }
                40% { transform: translateY(-2px) rotate(2deg); }
                60% { transform: translateY(-2px) rotate(-1deg); }
                80% { transform: translateY(-2px) rotate(1deg); }
                100% { transform: translateY(-2px) rotate(0deg); }
            }
            .pairing-step-num {
                display: inline-flex;
                align-items: center;
                justify-content: center;
                width: 32px;
                height: 32px;
                background: linear-gradient(135deg, #1976D2, #4285F4);
                color: #fff;
                font-size: 14px;
                font-weight: 700;
                border-radius: 8px;
                margin-bottom: 14px;
            }
            .pairing-step-title {
                font-size: 16px;
                font-weight: 600;
                color: var(--guide-ink);
                margin: 0 0 8px;
            }
            .pairing-step-desc {
                font-size: 13px;
                color: var(--guide-muted);
                line-height: 1.6;
                margin: 0;
            }

            /* ===== 入场动画 ===== */
            .pairing-reveal {
                opacity: 0;
                transform: translateY(28px);
                transition: opacity 0.8s ease, transform 0.8s ease;
            }
            .pairing-reveal.is-visible {
                opacity: 1;
                transform: translateY(0);
            }
            .pairing-reveal.delay-1 { transition-delay: 0.1s; }
            .pairing-reveal.delay-2 { transition-delay: 0.2s; }
            .pairing-reveal.delay-3 { transition-delay: 0.3s; }
            .pairing-reveal.delay-4 { transition-delay: 0.4s; }
            .pairing-reveal.delay-5 { transition-delay: 0.5s; }

            /* 隐藏新移动端内容 */
            .pair-mobile-hero,
            .pair-mobile-content {
                display: none !important;
            }
        }

        /* ===== 移动端样式 ===== */
        @media (max-width: 768px) {

            * { box-sizing: border-box; margin: 0; padding: 0; }
            html, body { width: 100%; min-height: 100%; }
            body {
                margin: 0 !important;
                padding: 0 !important;
                font-family: var(--font-sans);
                color: var(--pair-ink);
                -webkit-font-smoothing: antialiased;
                background: var(--color-bg);
                overflow-x: hidden;
            }

            header {
                margin-bottom: 0 !important;
                box-shadow: 0 1px 0 rgba(0,0,0,0.06) !important;
                padding: 0 !important;
                background: rgba(255,255,255,0.9) !important;
                backdrop-filter: saturate(180%) blur(20px);
                position: relative !important;
                top: 0;
                z-index: var(--z-nav-dropdown);
                display: block;
            }

            main {
                padding-top: 0 !important;
            }

            /* 隐藏桌面端内容 */
            .desktop-content {
                display: none !important;
            }

            .header-menu-2 {
                width: 100%;
                background-color: #FFFFFF;
                margin: 0 auto;
                display: flex;
                align-items: center;
                justify-content: space-between;
            }
            #hamburger-menu {
                margin-right: 10px;
                cursor: pointer;
                display: flex;
                flex-direction: column;
                justify-content: space-between;
                width: 28px;
                height: 20px;
                position: relative;
                padding: 2px 0;
            }
            #hamburger-menu .menu-line {
                width: 100%;
                height: 2.5px;
                background-color: #1a1a1a;
                border-radius: 2px;
                position: absolute;
                left: 0;
                transition: all 0.3s ease;
            }
            #hamburger-menu .menu-line.top { top: 0; }
            #hamburger-menu .menu-line.middle { top: 50%; transform: translateY(-50%); }
            #hamburger-menu .menu-line.bottom { bottom: 0; }
            #hamburger-menu.hamburger-active .menu-line.top {
                top: 8px;
                transform: rotate(45deg);
            }
            #hamburger-menu.hamburger-active .menu-line.middle {
                opacity: 0;
            }
            #hamburger-menu.hamburger-active .menu-line.bottom {
                top: 8px;
                bottom: auto;
                transform: rotate(-45deg);
            }

            /* popup menu */
            #popup-menu {
                position: fixed;
                top: 0;
                right: -150px;
                width: 150px;
                height: 100%;
                background-color: transparent;
                z-index: var(--z-nav-header);
                transition: right 0.3s ease;
            }
            #popup-menu.active { right: 0; }
            #top-transparent-area {
                height: 62px;
                background-color: transparent;
                cursor: pointer;
            }
            #menu-overlay {
                position: fixed;
                top: 0;
                left: 0;
                width: 100%;
                height: 100%;
                background-color: rgba(0, 0, 0, 0.5);
                display: none;
                z-index: var(--z-nav);
            }
            #menu-overlay.active { display: block; }

            /* ===== Hero ===== */
            .pair-mobile-hero {
                position: relative;
                padding: 28px 20px 24px;
                background: transparent;
                overflow: hidden;
                display: block;
            }
            .pair-mobile-hero::before {
                content: "";
                position: absolute;
                top: -40px;
                right: -30px;
                width: 180px;
                height: 180px;
                background: radial-gradient(circle, rgba(66, 133, 244, 0.14) 0%, transparent 70%);
                border-radius: 50%;
                pointer-events: none;
            }
            .pair-mobile-hero::after {
                content: "";
                position: absolute;
                bottom: -60px;
                left: -40px;
                width: 160px;
                height: 160px;
                background: radial-gradient(circle, rgba(25, 118, 210, 0.1) 0%, transparent 70%);
                border-radius: 50%;
                pointer-events: none;
            }
            .pair-mobile-hero-inner {
                position: relative;
                z-index: var(--z-content);
            }
            .pair-mobile-back {
                display: inline-flex;
                align-items: center;
                gap: 6px;
                padding: 10px 18px;
                background: var(--color-primary);
                border-radius: 8px;
                font-size: 14px;
                font-weight: 500;
                color: #FFFFFF;
                text-decoration: none;
                margin-bottom: 16px;
                transition: all 0.3s ease;
            }
            .pair-mobile-back:active {
                transform: scale(0.96);
                background: var(--color-primary-hover);
            }
            .pair-mobile-back-arrow {
                font-size: 16px;
                line-height: 1;
                transform: translateY(-1px);
            }
            .pair-mobile-hero-meta {
                display: flex;
                align-items: center;
                gap: 10px;
                margin-bottom: 14px;
            }
            .pair-mobile-hero-meta-line {
                width: 28px;
                height: 2px;
                background: var(--pair-blue);
                opacity: 0.35;
                border-radius: 2px;
            }
            .pair-mobile-hero-eyebrow {
                font-family: var(--font-mono);
                font-size: 11px;
                font-weight: 700;
                letter-spacing: 2.5px;
                color: var(--pair-blue);
                text-transform: uppercase;
            }
            .pair-mobile-hero-step {
                font-size: 13px;
                font-weight: 600;
                color: var(--pair-faint);
                margin-left: auto;
                font-variant-numeric: tabular-nums;
            }
            .pair-mobile-hero h1 {
                font-family: var(--font-serif);
                font-size: 30px;
                font-weight: 600;
                line-height: 1.15;
                color: var(--pair-ink);
                margin: 0 0 10px;
                letter-spacing: -1px;
            }
            .pair-mobile-hero h1 em {
                font-style: italic;
                font-weight: 500;
                background: linear-gradient(135deg, #1976D2 0%, #4285F4 100%);
                -webkit-background-clip: text;
                -webkit-text-fill-color: transparent;
                background-clip: text;
                margin-left: 4px;
            }
            .pair-mobile-hero-lead {
                font-size: 14px;
                line-height: 1.6;
                color: var(--pair-muted);
                margin: 0;
                font-weight: 400;
            }

            /* ===== Content ===== */
            .pair-mobile-content {
                padding: 24px 16px 40px;
                background: transparent;
                display: block;
            }

            .pairing-toggle-wrap {
                display: flex;
                align-items: center;
                justify-content: space-between;
                padding: 16px 20px;
                background: var(--guide-surface-alt);
            }

            /* Segmented control */
            .pair-segmented {
                position: relative;
                display: flex;
                height: 44px;
                gap: 8px;
                margin-bottom: 16px;
                padding: 4px;
                background: var(--pair-surface-card);
                border: 1px solid var(--pair-line);
                border-radius: 999px;
            }
            .pair-segmented-indicator {
                position: absolute;
                top: 4px;
                left: 4px;
                width: calc((100% - 16px) / 2);
                height: calc(100% - 8px);
                background: linear-gradient(135deg, #1976D2, #4285F4);
                border-radius: 999px;
                transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1), width 0.35s cubic-bezier(0.4, 0, 0.2, 1);
                z-index: var(--z-base);
                box-shadow: 0 2px 10px rgba(25, 118, 210, 0.3);
            }
            .pair-segmented-btn {
                flex: 1;
                position: relative;
                z-index: var(--z-content);
                display: flex;
                align-items: center;
                justify-content: center;
                gap: 6px;
                font-size: 14px;
                font-weight: 500;
                color: var(--pair-muted);
                cursor: pointer;
                border-radius: 999px;
                transition: color 0.3s ease;
                border: none;
                background: transparent;
                -webkit-tap-highlight-color: transparent;
            }
            .pair-segmented-btn.active {
                color: #FFFFFF;
                font-weight: 600;
            }
            .pair-segmented-btn:active { opacity: 0.8; }
            .pair-segmented-btn-icon {
                width: 16px;
                height: 16px;
            }

            /* Display card */
            .pair-display-card {
                position: relative;
                background: var(--pair-surface);
                border: 1px solid var(--pair-line);
                border-radius: 16px;
                overflow: hidden;
                box-shadow: 0 4px 20px rgba(25, 118, 210, 0.05);
                padding: 12px;
            }

            /* Carousel */
            .pair-carousel-wrap {
                position: relative;
                width: 100%;
                aspect-ratio: 9/16;
                background: var(--pair-surface-alt);
                overflow: hidden;
                border-radius: 12px;
            }
            .pair-carousel {
                display: flex;
                width: 100%;
                height: 100%;
                transition: transform 0.45s cubic-bezier(0.22, 0.61, 0.36, 1);
            }
            .pair-carousel-slide {
                flex-shrink: 0;
                width: 100%;
                height: 100%;
                display: flex;
                align-items: center;
                justify-content: center;
                padding: 20px;
            
                overflow: hidden;
                position: relative;
                transform: translateZ(0);
                box-sizing: border-box;}
            .pair-carousel-slide img {
                max-width: 100%;
                max-height: 100%;
                object-fit: contain;
                border-radius: 8px;
                cursor: zoom-in;
            
                position: relative;
                z-index: 0;}
            .pair-carousel-btn {
                position: absolute;
                top: 50%;
                transform: translateY(-50%);
                width: 36px;
                height: 36px;
                display: flex;
                align-items: center;
                justify-content: center;
                background: rgba(255, 255, 255, 0.92);
                backdrop-filter: blur(10px);
                border: 1px solid rgba(0, 0, 0, 0.06);
                border-radius: 50%;
                font-size: 16px;
                color: var(--pair-ink);
                cursor: pointer;
                z-index: var(--z-card);
                transition: all 0.25s ease;
                -webkit-tap-highlight-color: transparent;
                opacity: 0;
                pointer-events: none;
            }
            .pair-carousel-btn:active { transform: translateY(-50%) scale(0.92); }
            .pair-carousel-btn.prev { left: 12px; }
            .pair-carousel-btn.next { right: 12px; }
            .pair-carousel-btn:disabled {
                opacity: 0;
                pointer-events: none;
            }
            .pair-carousel-dots {
                position: absolute;
                bottom: 16px;
                left: 50%;
                transform: translateX(-50%);
                display: flex;
                gap: 7px;
                z-index: var(--z-card);
            }
            .pair-carousel-dot {
                width: 7px;
                height: 7px;
                border-radius: 50%;
                background: rgba(0, 0, 0, 0.15);
                transition: all 0.3s ease;
                cursor: pointer;
            }
            .pair-carousel-dot.active {
                width: 20px;
                border-radius: 4px;
                background: var(--pair-blue);
            }

            /* Video placeholder */
            .pair-video-placeholder {
                aspect-ratio: 9/16;
                display: flex;
                flex-direction: column;
                align-items: center;
                justify-content: center;
                background: var(--pair-surface-alt);
                color: var(--pair-faint);
                border-radius: 12px;
            }
            .pair-video-placeholder-icon {
                width: 48px;
                height: 48px;
                margin-bottom: 12px;
                opacity: 0.4;
            }
            .pair-video-placeholder p {
                font-size: 13px;
                margin: 0;
                font-weight: 500;
            }

            /* Steps info */
            .pair-steps-info {
                margin-top: 16px;
                padding: 20px;
                background: #FFFFFF;
                border: 2px solid #1976D2;
                border-radius: 16px;
                box-shadow: 0 4px 16px rgba(25, 118, 210, 0.12);
                overflow: hidden;
            }
            .pair-steps-info-title {
                display: flex;
                align-items: center;
                gap: 10px;
                font-family: var(--font-serif);
                font-size: 20px;
                font-weight: 600;
                color: var(--pair-ink);
                margin: 0 0 16px;
            }
            .pair-steps-info-title-dot {
                width: 4px;
                height: 20px;
                border-radius: 2px;
                background: linear-gradient(180deg, #1976D2, #4285F4);
            }
            .pair-steps-list {
                list-style: none;
                padding: 0;
                margin: 0;
            }
            .pair-steps-list li {
                display: flex;
                align-items: flex-start;
                gap: 12px;
                padding: 14px 0;
            }
            .pair-steps-list li + li {
                border-top: 1px solid var(--pair-line-light);
            }
            .pair-step-num {
                flex-shrink: 0;
                width: 26px;
                height: 26px;
                display: flex;
                align-items: center;
                justify-content: center;
                background: linear-gradient(135deg, #1976D2, #4285F4);
                color: #fff;
                font-size: 13px;
                font-weight: 600;
                border-radius: 50%;
                margin-top: 1px;
                box-shadow: 0 2px 6px rgba(25, 118, 210, 0.3);
            }
            .pair-step-text {
                flex: 1;
                font-size: 14px;
                line-height: 1.7;
                color: var(--pair-muted);
            }
            .pair-step-text strong {
                color: var(--pair-ink);
                font-weight: 600;
            }

            /* 单步骤切换 */
            .pair-step-singles {
                position: relative;
            }
            .pair-step-single {
                display: none;
            }
            .pair-step-single.active {
                display: block;
            }
            .pair-step-single-num {
                font-size: 12px;
                font-weight: 700;
                color: #1976D2;
                letter-spacing: 2px;
                margin-bottom: 10px;
                text-align: center;
                transition: transform 0.1s ease, opacity 0.1s ease;
            }
            .pair-step-single-title {
                font-size: 18px;
                font-weight: 700;
                color: #454F5E;
                margin: 0 0 10px;
                text-align: center;
                transition: transform 0.1s ease, opacity 0.1s ease;
            }
            .pair-step-single-desc {
                font-size: 14px;
                color: #556675;
                line-height: 1.6;
                margin: 0;
                text-align: center;
                transition: transform 0.1s ease, opacity 0.1s ease;
            }
            .pair-step-single-desc strong {
                color: #454F5E;
                font-weight: 600;
            }
            /* 文字滑出滑入动画 */
            .pair-step-single-num.slide-out,
            .pair-step-single-title.slide-out,
            .pair-step-single-desc.slide-out {
                transform: translateX(-100%);
                opacity: 0;
            }
            .pair-step-single-num.slide-in,
            .pair-step-single-title.slide-in,
            .pair-step-single-desc.slide-in {
                transform: translateX(100%);
                opacity: 0;
            }
            .pair-step-single-num.slide-in-reverse,
            .pair-step-single-title.slide-in-reverse,
            .pair-step-single-desc.slide-in-reverse {
                transform: translateX(-100%);
                opacity: 0;
            }
            .pair-step-single-num.slide-out-reverse,
            .pair-step-single-title.slide-out-reverse,
            .pair-step-single-desc.slide-out-reverse {
                transform: translateX(100%);
                opacity: 0;
            }
            /* 步骤导航栏 */
            .pair-step-actions {
                display: flex;
                align-items: center;
                justify-content: center;
                gap: 20px;
                margin-top: 16px;
                padding-top: 16px;
                border-top: 1px solid #E8ECF1;
            }
            .pair-step-btn {
                width: 44px;
                height: 44px;
                background: #FFFFFF;
                color: #454F5E;
                border: 1px solid #E2E8F0;
                border-radius: 50%;
                font-size: 18px;
                cursor: pointer;
                display: flex;
                align-items: center;
                justify-content: center;
                transition: all 0.25s ease;
                -webkit-tap-highlight-color: transparent;
            }
            .pair-step-btn:active {
                background: #1976D2;
                color: #FFFFFF;
                border-color: #1976D2;
            }
            .pair-step-btn:disabled {
                opacity: 0.35;
                pointer-events: none;
            }
            .pair-step-indicator {
                font-size: 13px;
                color: #94A3B8;
                font-weight: 500;
                min-width: 50px;
                text-align: center;
            }
            .pair-step-indicator span {
                color: #1976D2;
                font-weight: 700;
            }
            .pair-step-dots {
                display: flex;
                justify-content: center;
                gap: 8px;
                margin-top: 14px;
            }
            .pair-step-dot {
                width: 8px;
                height: 8px;
                border-radius: 50%;
                background: #E2E8F0;
                transition: all 0.3s ease;
                cursor: pointer;
            }
            .pair-step-dot.active {
                background: #1976D2;
                width: 24px;
                border-radius: 4px;
            }

            /* ===== Animations ===== */
            .pair-animate-in {
                opacity: 0;
                transform: translateY(14px);
            }
            .pair-animate-in.visible {
                opacity: 1;
                transform: translateY(0);
                transition: opacity 0.6s cubic-bezier(0.22, 1, 0.36, 1), transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
            }
            .pair-animate-in.delay-1 { transition-delay: 0.08s; }
            .pair-animate-in.delay-2 { transition-delay: 0.16s; }
            .pair-animate-in.delay-3 { transition-delay: 0.24s; }
            .pair-animate-in.delay-4 { transition-delay: 0.32s; }
        }
    /* 客户端下载按钮 */
    .client-download-wrap {
        position: relative;
        margin-left: auto;
        line-height: 56px;
        list-style: none;
    }
    .client-download-btn {
        display: inline-block;
        text-decoration: none;
            padding: 6px 14px;
            background: transparent;
            color: #333;
            font-size: 13px;
            font-weight: 500;
            border: none;
            border-radius: 6px;
            cursor: pointer;
            transition: all 0.25s ease;
            font-family: inherit;
        }
        .client-download-btn:hover {
            background: transparent;
            color: #1976D2;
            transform: translateY(-1px);
        }
    .client-download-popup {
        position: absolute;
        top: calc(100% + 8px);
        right: 0;
        width: 164px;
        padding: 12px;
        background: #fff;
        border-radius: 10px;
        box-shadow: 0 8px 30px rgba(0,0,0,0.15);
        opacity: 0;
        visibility: hidden;
        transform: translateY(-6px);
        transition: all 0.25s ease;
        z-index: var(--z-nav-header);
        pointer-events: none;
        line-height: normal;
    }
    .client-download-popup::before {
        content: "";
        position: absolute;
        top: -6px;
        right: 20px;
        width: 12px;
        height: 12px;
        background: #fff;
        transform: rotate(45deg);
        border-radius: 2px;
    }
    .client-download-wrap:hover .client-download-popup,
    .client-download-popup:hover {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
        pointer-events: auto;
    }
    .client-download-popup img {
        width: 100%;
        height: auto;
        display: block;
        border-radius: 4px;
    }
        .client-download-popup .popup-title {
            font-size: 14px;
            color: #333;
            text-align: center;
            margin-top: 8px;
            margin-bottom: 4px;
            font-weight: 500;
        }
        .client-download-popup .popup-desc {
            font-size: 12px;
            color: #999;
            text-align: center;
            margin: 0;
        }

        .client-download-wrap {
            display: none;
        }

        @media (min-width: 769px) {
            .client-download-wrap {
                display: flex;
                align-items: center;
            }
        }
    

            @media (max-width: 768px) {
                .header-menu-1,
                .header-menu-2 {
                    width: 100% !important;
                }
            }
        
/* 2026-08-17 移动端移除轮播图指示点 */
@media (max-width: 768px) {
    .pair-carousel-dots,
    .pair-carousel-dot {
        display: none !important;
    }
}

/* 2026-08-17 移动端轮播区比例与 video 预览修复（9:16 竖屏） */
@media (max-width: 768px) {
    .pair-carousel-wrap {
        aspect-ratio: auto !important;
        height: auto !important;
    }
    .pair-carousel {
        height: auto !important;
    }
    .pair-carousel-slide {
        height: auto !important;
    }
    .pair-carousel-slide img {
        max-height: 50vh !important;
        height: auto !important;
    }
    .pair-video-wrap {
        aspect-ratio: 9/16 !important;
        height: var(--pair-video-height, 60vh) !important;
        width: auto !important;
        max-width: 100% !important;
        max-height: none !important;
        margin: 0 auto !important;
    }
    .pair-video-wrap iframe {
        width: 100% !important;
        height: 100% !important;
        border: 0 !important;
    }
}


/* ============================================================
   深色模式兜底：覆盖本文件写死的浅色背景，使其跟随 theme-toggle 真源
   ============================================================ */
@media (prefers-color-scheme: dark) and (max-width: 768px) {
    /* 步骤信息卡片 */
    .pair-steps-info {
        background: var(--surface-card) !important;
        border-color: var(--line-default) !important;
    }
    .pair-steps-info-title,
    .pair-steps-info-text {
        color: var(--text-primary) !important;
    }
    /* 步骤切换按钮 */
    .pair-step-btn {
        background: var(--surface-card) !important;
        border-color: var(--line-default) !important;
        color: var(--text-primary) !important;
    }
    /* 客户端下载弹窗 */
    .client-download-popup,
    .client-download-popup::before {
        background: var(--surface-card) !important;
    }
    .client-download-popup .popup-title { color: var(--text-primary) !important; }
    .client-download-popup .popup-desc { color: var(--text-secondary) !important; }
            /* 2026-08-17 深色模式下隐藏 Hero 光圈 */
            .pair-mobile-hero::before,
            .pair-mobile-hero::after {
                display: none !important;
            }

}