:root {
    --primary: #007DFF;
    --primary-rgb: 0, 125, 255;
    --danger: #E53E3E;
    --danger-rgb: 229, 62, 62;
    --danger-light: #F87171;
    --danger-bg: #FEF2F2;
    --danger-card: rgba(254, 242, 242, 0.95);

    --text: #1D1D1F;
    --text-light: #6B7280;

    --bg: #F5F7FA;
    --bg-card: rgba(255, 255, 255, 0.45);
    --bg-card-strong: rgba(255, 255, 255, 0.92);

    --shadow-xs: 0 2px 6px rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.07);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.10);
    --shadow-lg: 0 12px 36px rgba(0, 0, 0, 0.14);
    --shadow-danger: 0 8px 24px rgba(229,62,62,0.18);

    --radius-xs: 12px;
    --radius-sm: 16px;
    --radius-md: 20px;
    --radius-lg: 24px;

    --space-xs: 8px;
    --space-sm: 12px;
    --space-md: 18px;
    --space-lg: 26px;
    --space-xl: 36px;
    --space-2xl: 50px;

    --transition: 0.28s cubic-bezier(0.22, 1, 0.36, 1);
    --transition-fast: 0.18s ease-out;
    --transition-smooth: 0.38s ease-out;
    --transition-close: 0.32s ease-in-out;
    --transition-text: 0.3s ease all;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
    -webkit-tap-highlight-color: transparent;
    transition: var(--transition-text);
}

body {
    background-color: var(--bg);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
    touch-action: manipulation;
    font-size: 17px;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* 设备不支持 红色警示页 全屏嵌套 优先加载 */
#deviceWarn {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: var(--danger-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    flex-direction: column;
    text-align: center;
    opacity: 0;
    visibility: hidden;
}
#deviceWarn.active {
    opacity: 1;
    visibility: visible;
}
.warn-wrap {
    max-width: 600px;
    width: 100%;
}
.warn-icon {
    font-size: 80px;
    color: var(--danger);
    margin-bottom: var(--space-lg);
}
.warn-title {
    font-size: 36px;
    font-weight: 700;
    color: var(--danger);
    margin-bottom: var(--space-md);
    line-height: 1.2;
}
.warn-desc {
    font-size: 20px;
    color: #7F1D1D;
    margin-bottom: var(--space-2xl);
    line-height: 1.7;
}
/* 警示页内红色客服卡片 */
.warn-service-card {
    background: var(--danger-card);
    border-radius: var(--radius-md);
    padding: var(--space-xl);
    box-shadow: var(--shadow-danger);
}
.warn-service-icon {
    font-size: 50px;
    color: var(--danger);
    margin-bottom: 10px;
}
.warn-service-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--danger);
	margin-bottom: 8px;
}
.warn-service-desc {
    font-size: 17px;
    color: #7F1D1D;
    margin-bottom: var(--space-lg);
}
.warn-service-btn {
    padding: 14px 36px;
    font-size: 19px;
    font-weight: 600;
    background: var(--danger);
    color: #fff;
    border-radius: var(--radius-xs);
    border: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    box-shadow: 0 6px 16px rgba(var(--danger-rgb), 0.25);
    transition: var(--transition-fast);
}
.warn-service-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(var(--danger-rgb), 0.3);
    background: var(--danger-light);
}

/* 液态玻璃核心 */
.glass {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    position: relative;
    transition: var(--transition);
    overflow: hidden;
    z-index: 1;
}

.glass-content {
    position: relative;
    z-index: 1;
    background: var(--bg-card-strong);
    border-radius: var(--radius-md);
    padding: var(--space-xl);
}

.glass::before {
    content: "";
    position: absolute;
    width: 180%;
    height: 180%;
    top: -40%;
    left: -40%;
    background: radial-gradient(
        circle at 35% 25%,
        rgba(var(--primary-rgb), 0.10) 0%,
        rgba(var(--primary-rgb), 0.02) 60%,
        transparent 75%
    );
    pointer-events: none;
}

.glass:not(.no-lift):hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
}

/* 跟手按压反馈 */
.pressed {
    transform: translateY(0) scale(0.988) !important;
    box-shadow: var(--shadow-xs) !important;
    transition: var(--transition-fast);
}

/* 按钮样式优化 - 字体放大 */
.btn {
    border-radius: var(--radius-xs);
    font-weight: 600;
    font-size: 18px;
    padding: 12px var(--space-lg);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    transition: var(--transition-fast);
    cursor: pointer;
    border: none;
    touch-action: none;
    user-select: none;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 6px 16px rgba(var(--primary-rgb), 0.25);
}

.btn-primary:hover {
    box-shadow: 0 8px 20px rgba(var(--primary-rgb), 0.30);
    transform: translateY(-2px);
}

.btn-outline {
    display: none;
}

/* 购买卡密按钮 橙色醒目区分下载按钮 */
.btn-buy {
    background: #F97316;
    color: #fff;
    box-shadow: 0 6px 16px rgba(249, 115, 22, 0.25);
    margin-left: var(--space-sm);
}
.btn-buy:hover {
    box-shadow: 0 8px 20px rgba(249, 115, 22, 0.30);
    transform: translateY(-2px);
}

/* 客服双选项按钮 特殊样式-字体放大 */
.btn-service {
    width: 100%;
    margin: 10px 0;
    font-size: 19px;
    padding: 16px var(--space-lg);
    border-radius: var(--radius-xs);
    border: none;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    cursor: pointer;
    transition: var(--transition-fast);
}
.btn-qq {
    background: #12B7F5;
    color: #fff;
}
.btn-email {
    background: #667eea;
    color: #fff;
}
.btn-service:hover {
    opacity: 0.9;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

/* 标题下划线 - 字体放大+柔化动画 */
.section-title {
    font-size: 32px;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--space-xl);
    position: relative;
    display: inline-block;
    left: 50%;
    transform: translateX(-50%);
    color: var(--text);
}

.section-title::after {
    content: "";
    position: absolute;
    bottom: -12px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--primary);
    border-radius: 3px;
}

/* Header 头部 - 字体放大 */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 998;
    padding: 12px 0;
}

.header .glass {
    background: rgba(255, 255, 255, 0.45);
}

.header .glass-content {
    padding: 10px var(--space-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 20px;
    font-weight: 700;
    color: var(--text);
}

.nav-logo i { color: var(--primary); }

.nav-list {
    display: flex;
    gap: var(--space-xl);
}

.nav-link {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-light);
    transition: var(--transition-text);
}

.nav-link:hover { 
    color: var(--primary);
    letter-spacing: 0.5px;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.mobile-btn {
    font-size: 24px;
    color: var(--text-light);
    background: none;
    border: none;
    cursor: pointer;
    touch-action: none;
    width: 45px;
    height: 45px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* 菜单遮罩 */
.menu-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.18);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-smooth), visibility 0s linear var(--transition-smooth);
}

.menu-backdrop.show {
    opacity: 1;
    visibility: visible;
    transition: opacity var(--transition-smooth);
}

/* 侧边菜单 完美可用版 */
.mobile-menu {
    position: fixed;
    top: 0;
    right: 0;
    width: 85%;
    max-width: 350px;
    height: 100vh;
    z-index: 1000;
    transform: translateX(100%);
    transition: transform 0.35s ease-out;
    background: transparent;
    pointer-events: none;
}
.mobile-menu.show {
    transform: translateX(0);
    pointer-events: auto;
}
.mobile-menu .glass {
    height: 100%;
    width: 100%;
    pointer-events: auto;
    z-index: 1001;
    background: rgba(255,255,255,0.95);
}
.mobile-menu .glass-content {
    height: 100%;
    display: flex;
    flex-direction: column;
    padding: 30px 25px;
    pointer-events: auto;
}

/* 菜单关闭按钮 完美可用 */
.menu-close {
    position: absolute;
    top: 28px;
    right: 25px;
    font-size: 28px;
    color: var(--text-light);
    background: #ffffff;
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 1005;
    pointer-events: auto;
    box-shadow: var(--shadow-xs);
    transition: all var(--transition-fast);
}
.menu-close:hover {
    color: var(--primary);
    transform: rotate(90deg);
}
.menu-header {
    display: flex;
    justify-content: flex-start;
    align-items: center;
    margin-bottom: var(--space-xl);
    width: 100%;
    padding-bottom: 15px;
    border-bottom: 1px solid rgba(0,0,0,0.05);
    margin-top: 10px;
}

/* 菜单列表 字体放大+动画 */
.menu-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
    margin-bottom: auto;
    padding-top: var(--space-md);
}
.menu-link {
    font-size: 19px;
    font-weight: 600;
    color: var(--text-light);
    display: flex;
    align-items: center;
    gap: var(--space-md);
    transition: var(--transition-text);
    padding: 12px 0;
}
.menu-link:hover {
    color: var(--primary);
    padding-left: 5px;
    letter-spacing: 0.3px;
}
.menu-actions {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    padding-top: var(--space-md);
}

/* Hero 主视觉区 - 全文字放大+柔化动画 */
.hero {
    padding: 130px 0 var(--space-2xl);
}
.hero-wrap {
    display: flex;
    align-items: center;
    gap: var(--space-2xl);
}
.hero-content {
    flex: 1;
}
.hero-tag {
    display: inline-block;
    background: rgba(var(--primary-rgb), 0.10);
    color: var(--primary);
    padding: 8px 15px;
    border-radius: 999px;
    font-size: 16px;
    font-weight: 600;
    margin-bottom: var(--space-md);
}
.hero-title {
    font-size: 46px;
    line-height: 1.2;
    margin-bottom: var(--space-md);
    background: linear-gradient(90deg, var(--text) 0%, rgba(var(--primary-rgb), 0.92) 70%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.hero-desc {
    font-size: 19px;
    color: red;
    margin-bottom: var(--space-xl);
    max-width: 520px;
    line-height: 1.7;
}
.hero-img {
    flex: 1;
    text-align: right;
}
.hero-img img {
    max-width: 100%;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
}

/* Features 功能区 - 字体放大 */
.features {
    padding: var(--space-2xl) 0;
}
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
}
.feature-card .glass-content {
    text-align: center;
    height: 100%;
    display: flex;
    flex-direction: column;
}
.feature-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto var(--space-lg);
    border-radius: 50%;
    background: rgba(var(--primary-rgb), 0.10);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 26px;
    transition: var(--transition-fast);
}
.feature-card:hover .feature-icon {
    background: var(--primary);
    color: #fff;
    transform: scale(1.08);
}
.feature-title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: var(--space-xs);
}
.feature-desc {
    color: var(--text-light);
    font-size: 17px;
    line-height: 1.6;
}

/* Adapt 适配区 - 字体放大 */
.adapt {
    padding: var(--space-2xl) 0;
    background: rgba(255, 255, 255, 0.65);
}
.adapt-card {
    max-width: 750px;
    margin: 0 auto;
}
.adapt-card .glass-content {
    text-align: center;
}
.adapt-icon {
    font-size: 56px;
    color: var(--primary);
    margin-bottom: var(--space-lg);
    transition: var(--transition-fast);
}
.adapt-title {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: var(--space-sm);
}
.adapt-subtitle {
    color: var(--text-light);
    margin-bottom: var(--space-xl);
    font-size: 19px;
}
.adapt-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
    text-align: left;
}
.adapt-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-xs);
    font-size: 17px;
    color: var(--text-light);
}
.adapt-item i {
    color: var(--primary);
    margin-top: 4px;
}
.adapt-btn {
    min-width: 200px;
    font-size: 19px;
    padding: 14px var(--space-xl);
}

/* 联系客服卡片 - 醒目按钮+字体放大+柔化动画 */
.service-card {
    padding: var(--space-2xl) 0;
    margin: 0 auto;
    width: 100%;
}
.service-card .glass {
    max-width: 900px;
    margin: 0 auto;
    cursor: pointer;
}
.service-card .glass-content {
    text-align: center;
    padding: var(--space-2xl) var(--space-xl);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-lg);
}
.service-icon {
    font-size: 64px;
    color: var(--primary);
    margin-bottom: 8px;
}
.service-title {
    font-size: 30px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text);
}
.service-desc {
    font-size: 19px;
    color: var(--text-light);
    max-width: 500px;
    line-height: 1.7;
}
.service-btn {
    margin-top: var(--space-md);
    padding: 16px 36px;
    font-size: 20px;
    font-weight: 600;
    background: var(--primary);
    color: #fff;
    border-radius: var(--radius-xs);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 10px;
    box-shadow: 0 6px 16px rgba(var(--primary-rgb), 0.25);
    transition: var(--transition-fast);
}
.service-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(var(--primary-rgb), 0.3);
}

/* Footer 底部 - 字体放大 */
.footer {
    padding: var(--space-xl) 0 var(--space-2xl);
    background: rgba(255, 255, 255, 0.65);
}
.footer-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--space-xl);
    flex-wrap: wrap;
    gap: var(--space-xl);
}
.footer-brand {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 20px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: var(--space-md);
}
.footer-brand i { color: var(--primary); }
.footer-desc {
    font-size: 16px;
    color: var(--text-light);
    max-width: 280px;
}
.footer-links {
    display: flex;
    gap: var(--space-2xl);
    flex-wrap: wrap;
}
.footer-col {
    min-width: 140px;
}
.footer-col-title {
    font-size: 17px;
    font-weight: 700;
    margin-bottom: var(--space-md);
}
.footer-link {
    display: block;
    font-size: 16px;
    color: var(--text-light);
    margin-bottom: var(--space-xs);
    transition: var(--transition-text);
}
.footer-link:hover {
    color: var(--primary);
    padding-left: 4px;
}
.footer-cta {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    align-items: flex-end;
}
.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-md);
    padding-top: var(--space-md);
    border-top: 1px solid rgba(0, 0, 0, 0.05);
}
.copyright {
    font-size: 15px;
    color: var(--text-light);
}
.copyright a { color: var(--primary); }
.footer-info {
    font-size: 15px;
    color: var(--text-light);
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

/* 所有弹窗 排列优化+关闭动画+字体放大 */
.popup {
    position: fixed;
    inset: 0;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.12);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-close), visibility 0s linear 0.32s;
    padding: 20px;
    pointer-events: none;
}
.popup.show {
    opacity: 1;
    visibility: visible;
    transition: opacity var(--transition-smooth);
    pointer-events: auto;
}
.popup .glass {
    width: 100%;
    max-width: 480px;
    transform: scale(0.9) translateY(20px);
    opacity: 0;
    transition: transform var(--transition-smooth), opacity var(--transition-smooth);
    transition-delay: 0.05s;
    pointer-events: auto;
}
.popup.show .glass {
    transform: scale(1) translateY(0);
    opacity: 1;
}
.popup:not(.show) .glass {
    transform: scale(0.95) translateY(-10px);
    opacity: 0;
    transition: transform var(--transition-close), opacity var(--transition-close);
}

.popup-close {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    font-size: 20px;
    color: var(--text-light);
    background: rgba(255,255,255,0.8);
    border: none;
    cursor: pointer;
    transition: var(--transition-fast);
    z-index: 2001;
    touch-action: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-xs);
}
.popup-close:hover { 
    color: var(--primary);
    background: #fff;
}

.popup-icon {
    width: 76px;
    height: 76px;
    margin: 0 auto var(--space-lg);
    border-radius: 50%;
    background: rgba(var(--primary-rgb), 0.10);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 34px;
}
.popup-title {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: var(--space-xs);
    text-align: center;
}
.popup-desc {
    color: var(--text-light);
    margin-bottom: var(--space-lg);
    font-size: 18px;
    text-align: center;
    line-height: 1.7;
    padding: 0 8px;
}
.popup-version {
    font-size: 15px;
    color: var(--text-light);
    margin-top: var(--space-md);
    text-align: center;
}
.popup-btn-group {
    display: flex;
    gap: var(--space-sm);
    width: 100%;
}
.popup-btn {
    flex: 1;
    font-size: 19px;
    padding: 14px var(--space-xl);
}
#mobileOnlyPopup .popup-icon {
    background: rgba(255, 193, 7, 0.12);
    color: #FFC107;
}
#servicePopup .glass { max-width: 500px; }
#servicePopup .glass-content { padding: var(--space-xl); gap: 8px; }

/* 响应式适配 */
@media (max-width: 992px) {
    .nav-list, .nav-actions .btn:not(.mobile-btn) { display: none; }
    .mobile-btn { display: flex; }
    .hero-wrap { flex-direction: column; text-align: center; gap: var(--space-xl); }
    .hero-img { text-align: center; }
    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .adapt-list { grid-template-columns: 1fr; }
    .footer-top { flex-direction: column; gap: var(--space-xl); }
    .footer-cta { align-items: flex-start; }
    .hero-title { font-size: 38px; }
}

@media (max-width: 768px) {
    .features-grid { grid-template-columns: 1fr; }
    .hero-title { font-size: 32px; }
    .service-title { font-size: 26px; }
    .service-btn { padding:14px 28px; font-size:18px; }
    .btn-service { font-size:18px; padding:14px; }
    .popup-btn-group { flex-direction: column; gap: var(--space-xs); }
    .btn-buy { margin-left: 0; margin-top: 8px; }
}