/* ================================================================
               0. 重置 & 基础
               ================================================================ */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        :root {
            --ease-ui: cubic-bezier(0.42, 0, 0.58, 1);
            --transition-speed: 0.8s;
            --transition-ani: cubic-bezier(0.1, 0.1, 0.2, 1);
            /* 公共设计令牌 */
            --color-primary: #1456F0;
            --color-primary-hover: #3B7AF8;
            --color-text: #000000;
            --color-text-secondary: #6e7380;
            --color-text-muted: #9ca0ab;
            --color-border: #f0f1f4;
            --color-border-hover: #cdd0d9;
            --ease-smooth: cubic-bezier(0.22, 1, 0.36, 1);
            --radius-card: 16px;
            --radius-pill: 50px;
        }

        html {
            scroll-behavior: auto;
            overflow-y: scroll;
            -webkit-font-smoothing: antialiased;
        }

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            background: #ffffff;
            color: #111111;
            line-height: 1.6;
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
        }

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

        /* 公共容器 */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            width: 100%;
        }

        /* ================================================================
               1. 自定义光标 (桌面端)
               ================================================================ */
        @media (pointer: fine) {
            *:not(input):not(textarea):not(.custom-cursor),
            *:not(input):not(textarea):not(.custom-cursor)::before,
            *:not(input):not(textarea):not(.custom-cursor)::after {
                cursor: none !important;
            }

            .custom-cursor {
                position: fixed;
                top: 0;
                left: 0;
                width: 22px;
                height: 22px;
                background: rgba(20, 86, 240, 0.25);
                border: 1.5px solid rgba(20, 86, 240, 0.7);
                border-radius: 50%;
                pointer-events: none;
                transform: translate(-50%, -50%);
                z-index: 999999;
                transition: transform 0.25s cubic-bezier(0.22, 1, 0.36, 1),
                    background 0.3s ease,
                    border-color 0.3s ease,
                    width 0.3s ease,
                    height 0.3s ease;
                will-change: transform;
                backdrop-filter: blur(3px);
                box-shadow: 0 0 20px rgba(20, 86, 240, 0.08);
            }

            .custom-cursor.active {
                transform: translate(-50%, -50%) scale(0.65);
                background: rgba(0, 0, 0, 0.4);
                border-color: #000000c0;
            }

            .custom-cursor.hover {
                transform: translate(-50%, -50%) scale(1.5);
                background: rgba(20, 86, 240, 0.12);
                border-color: rgba(20, 86, 240, 0.3);
                width: 45px;
                height: 45px;
            }

            .custom-cursor.hover-active {
                transform: translate(-50%, -50%) scale(0.55);
                background: rgba(20, 86, 240, 0.8);
                border-color: #1456F0;
                width: 28px;
                height: 28px;
                box-shadow: 0 0 30px rgba(20, 86, 240, 0.15);
            }

            .custom-cursor.hover-active::after {
                content: '';
                position: absolute;
                inset: 0px;
                border-radius: 50%;
                border: 2px solid rgba(20, 86, 240, 0.3);
                animation: pulse-ring 2s ease-in-out infinite;
            }

            @keyframes pulse-ring {
                0% { 
                    transform: scale(1);
                    opacity: 1; 
                }
                100% {
                    transform: scale(3);
                    opacity: 0;
                }
            }
        }

        @media (pointer: coarse) {
            .custom-cursor {
                display: none !important;
            }
        }

        /* ================================================================
        2. 页面过渡遮罩（左右滑动 + Logo 模糊缩放，平滑拉满）
        ================================================================ */

        .page-transition {
            position: fixed;
            inset: 0;
            background: #ffffff;
            z-index: 2147483647;
            pointer-events: none;
            display: flex;
            align-items: center;
            justify-content: center;
            transform: translateX(0);
            transition: transform var(--transition-speed) var(--transition-ani);
        }

        /* 进入最终状态：遮罩左移出屏幕 */
        .page-transition.enter {
            transform: translateX(-100%);
        }

        /* Logo 图片 */
        .page-transition .content .logo-img {
            display: block;
            width: 80px;
            height: auto;
            margin: 0 auto 20px;
            transition: transform var(--transition-speed) var(--transition-ani),
                        filter var(--transition-speed) var(--transition-ani),
                        opacity var(--transition-speed) var(--transition-ani);
            /* 起始状态（进入前）：模糊放大 + 透明 */
            transform: scale(1.8);
            filter: blur(8px);
            opacity: 0;
        }

        /* 进入时：Logo 清晰正常 + 不透明 */
        .page-transition.enter .content .logo-img {
            transform: scale(1);
            filter: blur(0);
            opacity: 1;
        }

        /* 退出时（由 JS 动态控制）：Logo 模糊缩小 + 透明 */
        .page-transition .content .logo-img.exit-state {
            transform: scale(0.6);
            filter: blur(8px);
            opacity: 0;
        }

        /* 文字（可选） */
        .page-transition .content .text {
            font-family: 'Inter', sans-serif;
            font-size: clamp(1.6rem, 3.2vw, 3.2rem);
            font-weight: 300;
            letter-spacing: 0.12em;
            color: #111;
            transition: opacity var(--transition-speed) var(--transition-ani);
            opacity: 0;
        }

        .page-transition .content .text strong {
            font-weight: 700;
            color: #1456F0;
        }

        .page-transition.enter .content .text {
            opacity: 0.7;
        }

        .page-transition .content .text.exit-state {
            opacity: 0;
        }

        @media (max-width: 768px) {
            .page-transition .content .text {
                font-size: 1.4rem;
            }
            .page-transition .content .logo-img {
                width: 60px;
            }
        }
        /* ================================================================
               iq-bar 毛玻璃导航
        ================================================================ */

        /* 移动端直接隐藏 (CSS 兜底) */
        @media (max-width: 767px) {
            .iq-bar {
                display: none !important;
            }
        }

        .iq-bar {
            position: fixed;
            left: 50%;
            bottom: 8%;
            transform: translateX(-50%);
            z-index: 9990;
            opacity: 0;
            pointer-events: none;
            font-family: 'Inter', sans-serif;
            font-size: 22px;
            line-height: 1;
            transition: opacity 0.6s ease 0.8s;
        }
        .iq-bar.show {
            opacity: 1;
            pointer-events: auto;
        }

        .iq-inner {
            display: flex;
            align-items: center;
            gap: 15px;
            backdrop-filter: blur(13px);
            background: rgba(245, 245, 245, 0.25);
            border-radius: 999px;
            box-shadow: 0 12px 50px rgba(0, 0, 0, 0.15), inset 0 0 6px 1px rgba(255, 255, 255, 0.35);
            height: 55px;
            padding: 0 16px;
            min-width: 110px;
            overflow: hidden;
            transition: max-width 0.35s var(--ease-ui), background 0.35s var(--ease-ui);
            position: relative;
            max-width: 110px;
        }
        .iq-inner.expanded {
            max-width: 550px;
            background: rgba(245, 245, 245, 0.50);
        }
        .iq-inner.collapsing {
            max-width: 110px;
        }

        .iq-main-btn {
            all: unset;
            padding: 0 ;
            font-family: 'Inter', sans-serif;
            font-size: 16px;
            font-weight: 500;
            letter-spacing: 0.02em;
            color: #000000;
            cursor: pointer;
            white-space: nowrap;
            line-height: 1;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            flex-shrink: 0;
            width: 100%;
            transition: opacity 0.35s var(--ease-ui), transform 0.35 var(--ease-ui);
            opacity: 1;
            transform: translateY(0);
        }
        .iq-main-logo {
            font-size: 20px;
        }
        .iq-inner.expanded .iq-main-btn,
        .iq-inner.collapsing .iq-main-btn {
            display: none;
        }

        .iq-scroll {
            display: none;
            flex: 1;
            overflow-x: auto;
            overflow-y: hidden;
            scroll-behavior: smooth;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
            overscroll-behavior: contain;
            margin: 0 30px;
            -webkit-mask-image: linear-gradient(to right, transparent 0%, black 8%, black 92%, transparent 100%);
            mask-image: linear-gradient(to right, transparent 0%, black 8%, black 92%, transparent 100%);
        }
        .iq-scroll::-webkit-scrollbar {
            display: none;
        }
        .iq-inner.expanded .iq-scroll,
        .iq-inner.collapsing .iq-scroll {
            display: flex;
        }

        .iq-page {
            display: flex;
            gap: 10px;
            align-items: center;
            padding: 0 12px;
            flex-shrink: 0;
            transition: opacity 0.35s var(--ease-ui), transform 0.35s var(--ease-ui);
        }
        .iq-inner.hiding .iq-page {
            opacity: 0;
            transform: translateY(4px);
        }

        .iq-page a {
            padding: 8px 14px;
            font-size: 15px;
            text-decoration: none;
            color: #333;
            background: rgba(227, 227, 227, 0.6);
            border-radius: 999px;
            white-space: nowrap;
            transition: background 0.25s var(--ease-ui), color 0.25s var(--ease-ui), transform 0.25s var(--ease-ui), opacity 0.25s var(--ease-ui);
        }
        .iq-page:hover a {
            opacity: 0.85;
        }
        .iq-page a:hover {
            opacity: 1 !important;
            background: #000;
            color: #fff;
            transform: translateY(-1px);
        }
        /* ================================================================
        移动端贴顶导航栏 (仅窄屏显示)
        ================================================================ */
        .mobile-nav {
            display: none;                      /* 默认隐藏 */
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 9999;                      /* 保证在内容之上 */
            background: rgba(255, 255, 255, 0.75);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(0, 0, 0, 0.04);
            padding: 10px 16px;
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.03);
        }

        .mobile-nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-around;     /* 均匀分布 */
            max-width: 500px;                  /* 限制最大宽度，居中更好看 */
            margin: 0 auto;
            gap: 8px;
        }

        .mobile-nav-link {
            font-family: 'Inter', sans-serif;
            font-size: 15px;
            font-weight: 500;
            color: #111;
            text-decoration: none;
            padding: 8px 14px;
            border-radius: 50px;
            background: rgba(0, 0, 0, 0);
            transition: background 0.25s ease, color 0.25s ease;
            white-space: nowrap;
            letter-spacing: -0.01em;
        }

        .mobile-nav-link:hover,
        .mobile-nav-link:active {
            background: rgba(20, 86, 240, 0.08);
            color: #1456F0;
        }

        /* 窄屏显示 */
        @media (max-width: 767px) {
            .mobile-nav {
                display: block;
            }
        }

        /* 宽屏隐藏（虽然默认已隐藏，但为了保险） */
        @media (min-width: 768px) {
            .mobile-nav {
                display: none !important;
            }
        }

        .nav-button {
            position: absolute;
            top: 50%;
            transform: translateY(-50%);
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.25);
            border: none;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            z-index: 10;
            backdrop-filter: blur(4px);
            color: #333;
            padding: 0;
            margin: 0px 10px;
            transition: opacity 0.35 var(--ease-ui);
            opacity: 0;
            pointer-events: none;
        }
        .iq-inner.expanded .nav-button {
            opacity: 0.85;
            pointer-events: auto;
        }
        .nav-button:hover {
            opacity: 1 !important;
            background: rgba(255, 255, 255, 0.7);
            transform: translateY(-50%) scale(1.08);
        }
        .nav-button.left {
            left: 4px;
        }
        .nav-button.right {
            right: 4px;
        }
        .nav-button svg {
            width: 14px;
            height: 14px;
            fill: #333;
            display: block;
        }

        .iq-scroll.no-mask-left {
            -webkit-mask-image: linear-gradient(to right, black 8%, black 92%, transparent 100%) !important;
            mask-image: linear-gradient(to right, black 8%, black 92%, transparent 100%) !important;
        }
        .iq-scroll.no-mask-right {
            -webkit-mask-image: linear-gradient(to right, transparent 0%, black 8%, black 92%) !important;
            mask-image: linear-gradient(to right, transparent 0%, black 8%, black 92%) !important;
        }
        .iq-scroll.no-mask-both {
            -webkit-mask-image: none !important;
            mask-image: none !important;
        }