* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            -webkit-tap-highlight-color: transparent;
        }

        body {
            background: #f8fafd;
            overflow-x: hidden;
        }

        :root {
            --primary: #72bc3f;
            --primary-dark: #5c9e32;
            --primary-soft: rgba(114, 188, 63, 0.12);
            --gray-900: #111827;
            --gray-800: #1f2937;
            --gray-700: #374151;
            --white: #ffffff;
            --border-light: #eef2f6;
            --shadow-md: 0 12px 28px rgba(0, 0, 0, 0.08);
        }

        /* 顶部导航栏 88px */
        .navbar {
            position: sticky;
            top: 0;
            z-index: 1000;
            background-color: var(--white);
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
            height: 88px;
            display: flex;
            align-items: center;
            width: 100%;
        }

        .nav-container {
            max-width: 1650px;
            width: 100%;
            margin: 0 auto;
            padding: 0 32px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 88px;
            gap: 24px;
        }

        /* ===== 左侧 LOGO ===== */
        .logo-area {
            flex-shrink: 0;
            display: flex;
            align-items: center;
            height: 88px;
        }
        .logo-placeholder {
            height: 52px;
            background: linear-gradient(135deg, #72bc3f, #4c8c2a);
            color: white;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 0 24px;
            border-radius: 60px;
            font-size: 1.35rem;
            letter-spacing: 1px;
            text-transform: uppercase;
            font-family: 'Oswald', sans-serif;
            box-shadow: 0 4px 10px rgba(114, 188, 63, 0.25);
            transition: transform 0.2s;
        }
        .logo-placeholder:hover {
            transform: scale(1.01);
        }

        /* ===== 桌面端导航菜单 ===== */
        .desktop-nav-wrapper {
            flex: 1;
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100%;
        }
        .nav-menu {
            display: flex;
            list-style: none;
            gap: 4px;
            margin: 0;
            padding: 0;
            align-items: center;
            height: 100%;
        }
        .nav-item {
            position: relative;
            height: 100%;
            display: flex;
            align-items: center;
        }
        .nav-link {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 0 20px;
            font-size: 18px;
            font-weight: 700;
            color: var(--gray-800);
            text-decoration: none;
            height: 88px;
            transition: all 0.25s ease;
            white-space: nowrap;
            letter-spacing: 0.3px;
            text-transform: uppercase;
            cursor: pointer;
            font-family: 'Oswald', sans-serif;
        }
        .nav-link:hover {
            color: var(--primary);
            background: var(--primary-soft);
        }

        /* ===== 纯CSS箭头（替换原▼符号） ===== */
        .dropdown-arrow {
            display: inline-block;
            width: 0;
            height: 0;
            margin-left: 6px;

            border-left: 5px solid transparent;
            border-right: 5px solid transparent;
            border-top: 6px solid currentColor;
            transition: transform 0.2s ease;
            vertical-align: middle;
        }
        .nav-item.dropdown:hover .dropdown-arrow {
            transform: rotate(180deg);
            border-top-color: var(--primary);
        }

        /* 下拉菜单 */
        .dropdown-menu {
            position: absolute;
            top: 88px;
            left: 0;
            background: var(--white);
            box-shadow: var(--shadow-md);
            border-radius: 24px;
            min-width: 260px;
            padding: 10px 0;
            list-style: none;
            opacity: 0;
            visibility: hidden;
            transform: translateY(-12px);
            transition: all 0.2s ease;
            z-index: 200;
            border: 1px solid var(--border-light);
        }
        .nav-item.dropdown:hover .dropdown-menu {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        .dropdown-menu li a {
            display: block;
            padding: 12px 24px;
            font-size: 14px;
            font-weight: 500;
            color: var(--gray-700);
            text-decoration: none;
            transition: all 0.2s;
            text-transform: uppercase;
            font-family: 'Oswald', sans-serif;
        }
        .dropdown-menu li a:hover {
            background-color: var(--primary-soft);
            color: var(--primary);
            padding-left: 28px;
        }

        /* ===== 右侧手机区域：号码在前 + 图标在后 (仅号码有链接) ===== */
        .phone-area {
            flex-shrink: 0;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .phone-link {
            font-size: 18px;
            font-weight: 700;
            font-family: 'Oswald', sans-serif;
            color: var(--gray-900);
            text-decoration: none;
            background: #f9fbfd;
            padding: 8px 20px;
            border-radius: 60px;
            border: 1px solid var(--border-light);
            transition: all 0.25s;
            letter-spacing: 0.5px;
            white-space: nowrap;
        }
        .phone-link:hover {
            background-color: var(--primary-soft);
            border-color: var(--primary);
            color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 6px 14px rgba(114,188,63,0.15);
        }
        .phone-icon-static {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: #f1f5f9;
            border-radius: 50%;
            transition: all 0.2s;
        }
        .phone-icon-static svg {
            width: 20px;
            height: 20px;
            stroke: var(--primary-dark);
            stroke-width: 1.7;
            fill: none;
        }
        .phone-icon-static:hover {
            background: var(--primary-soft);
            transform: scale(1.02);
        }

        /* ===== 移动端专用组件 ===== */
        .hamburger {
            display: none;
            flex-direction: column;
            justify-content: space-between;
            width: 32px;
            height: 22px;
            background: transparent;
            border: none;
            cursor: pointer;
            z-index: 1100;
            padding: 0;
        }
        .hamburger span {
            width: 100%;
            height: 2.5px;
            background-color: var(--gray-800);
            border-radius: 4px;
            transition: all 0.2s;
        }
        .mobile-phone-wrapper {
            display: none;
            align-items: center;
            margin-right: 8px;
        }
        .mobile-phone-icon-static {
            background: var(--primary-soft);
            border-radius: 50%;
            width: 44px;
            height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.2s;
        }
        .mobile-phone-icon-static svg {
            width: 22px;
            height: 22px;
            stroke: var(--primary-dark);
            stroke-width: 1.7;
            fill: none;
        }

        /* 遮罩层 & 侧边栏 */
        .overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.5);
            backdrop-filter: blur(4px);
            z-index: 1200;
            opacity: 0;
            visibility: hidden;
            transition: opacity 0.3s ease, visibility 0.3s;
        }
        .overlay.active {
            opacity: 1;
            visibility: visible;
        }
        .mobile-sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: 85%;
            max-width: 360px;
            height: 100%;
            background: white;
            z-index: 1300;
            transform: translateX(-100%);
            transition: transform 0.3s cubic-bezier(0.2, 0.8, 0.4, 1);
            box-shadow: 8px 0 30px rgba(0, 0, 0, 0.12);
            display: flex;
            flex-direction: column;
            overflow-y: auto;
            padding-bottom: 30px;
        }
        .mobile-sidebar.open {
            transform: translateX(0);
        }
        .sidebar-header {
            display: flex;
            justify-content: flex-end;
            padding: 18px 20px;
            border-bottom: 1px solid #edf2f7;
        }
        .close-sidebar {
            background: none;
            border: none;
            font-size: 28px;
            cursor: pointer;
            color: var(--gray-700);
            width: 44px;
            height: 44px;
            border-radius: 30px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .mobile-menu-list {
            list-style: none;
            padding: 0;
            margin: 8px 0;
        }
        .mobile-menu-item {
            border-bottom: 1px solid #f0f2f8;
        }
        .mobile-link {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 16px 24px;
            font-size: 18px;
            font-weight: 700;
            color: var(--gray-800);
            text-decoration: none;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            cursor: pointer;
            font-family: 'Oswald', sans-serif;
        }
        /* 移动端纯CSS箭头 */
        .mobile-arrow {
            display: inline-block;
            width: 0;
            height: 0;
            border-left: 5px solid transparent;
            border-right: 5px solid transparent;
            border-top: 6px solid var(--gray-500);
            transition: transform 0.2s ease;
        }
        .mobile-item-has-child.active .mobile-arrow {
            transform: rotate(180deg);
            border-top-color: var(--primary);
        }
        .sub-mobile-menu {
            list-style: none;
            background-color: #fafcff;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
        }
        .mobile-item-has-child.active .sub-mobile-menu {
            max-height: 380px;
        }
        .sub-mobile-menu li a {
            display: block;
            padding: 14px 24px 14px 48px;
            font-size: 17px;
            font-weight: 700;
            text-transform: uppercase;
            color: var(--gray-700);
            text-decoration: none;
            border-top: 1px solid #ecf3fa;
            font-family: 'Oswald', sans-serif;
        }
        .sub-mobile-menu li a:active {
            background: var(--primary-soft);
            color: var(--primary);
        }
        /* 侧边栏底部电话卡片 */
        .sidebar-phone-card {
            margin-top: 28px;
            padding: 20px 24px;
            border-top: 1px solid var(--border-light);
            background: #ffffff;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            flex-wrap: wrap;
        }
        .sidebar-phone-link {
            background: var(--primary-soft);
            padding: 12px 20px;
            border-radius: 48px;
            text-decoration: none;
            color: var(--primary-dark);
            font-weight: 700;
            font-size: 18px;
            font-family: 'Oswald', sans-serif;
            transition: all 0.2s;
            flex: 1;
            text-align: center;
        }
        .sidebar-phone-link:active {
            background: var(--primary);
            color: white;
        }
        .sidebar-phone-icon {
            width: 44px;
            height: 44px;
            background: #f1f5f9;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .sidebar-phone-icon svg {
            width: 22px;
            height: 22px;
            stroke: var(--primary-dark);
            stroke-width: 1.7;
            fill: none;
        }

        /* 响应式 */
        @media screen and (max-width: 1100px) {
            .nav-link { padding: 0 16px; }
            .phone-link { padding: 6px 16px; font-size: 16px; }
            .nav-container { padding: 0 24px; }
        }
        @media screen and (max-width: 860px) {
            .desktop-nav-wrapper { display: none; }
            .hamburger { display: flex; }
            .mobile-phone-wrapper { display: flex; }
            .phone-area { display: none; }
            .nav-container { justify-content: space-between; gap: 12px; }
            .logo-area { margin-right: auto; }
        }
        @media screen and (min-width: 861px) {
            .mobile-sidebar, .overlay, .mobile-phone-wrapper { display: none; }
        }

        /* 演示内容 */
        .hero-section {
            max-width: 1280px;
            margin: 50px auto;
            padding: 20px 24px;
        }
        .demo-card {
            background: white;
            border-radius: 40px;
            padding: 48px 36px;
            text-align: center;
            border: 1px solid #eef2ff;
        }
        .demo-card h1 {
            font-size: 2.2rem;
            margin-bottom: 20px;
            font-weight: 600;
        }
        .color-badge {
            display: inline-block;
            background: var(--primary-soft);
            color: var(--primary-dark);
            border-radius: 60px;
            padding: 8px 22px;
            font-size: 0.85rem;
            font-weight: 600;
            text-transform: uppercase;
            margin-bottom: 24px;
        }
        .font-download-area {
            margin-top: 32px;
            background: #f0f4f9;
            border-radius: 28px;
            padding: 20px 24px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }
        .download-btn {
            background: var(--primary);
            color: white;
            padding: 8px 24px;
            border-radius: 40px;
            text-decoration: none;
            font-weight: 600;
            font-size: 0.9rem;
            transition: 0.2s;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-family: 'Oswald', sans-serif;
            text-transform: uppercase;
        }
        .download-btn:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
        }
        footer {
            text-align: center;
            padding: 32px;
            color: #5b6e8c;
            font-size: 14px;
            border-top: 1px solid #edf2f7;
            font-family: 'Oswald', sans-serif;
        }
        body.no-scroll {
            overflow: hidden;
            position: fixed;
            width: 100%;
        }
        .nav-link, .dropdown-menu a, .mobile-link, .sub-mobile-menu a, .logo-placeholder {
            text-transform: uppercase;
        }