/* ========== 全局变量 ========== */
:root {
    /* 颜色 - 优化底部配色，增加深色系层次感 */
    --primary: #165DFF;
    --secondary: #4080FF;
    --accent: #69B1FF;
    --dark: #1D2129;
    --dark-light: #272E3B; /* 新增：页脚浅深色，提升层次感 */
    --neutral: #4E5969;
    --light: #F7F8FA;
    --muted: #86909C;
    --white: #FFFFFF;
    --footer-hover: #364154; /* 新增：页脚元素hover背景色 */

    /* 阴影 */
    --shadow-glass: 0 2px 20px 0 rgba(22, 93, 255, 0.08);
    --shadow-elevated: 0 8px 24px -4px rgba(22, 93, 255, 0.06);
    --shadow-hover: 0 12px 32px -8px rgba(22, 93, 255, 0.12);
    --shadow-btn: 0 4px 16px rgba(22, 93, 255, 0.3);
    --shadow-footer: 0 -4px 20px rgba(0, 0, 0, 0.05); /* 新增：页脚顶部阴影 */

    /* 渐变 */
    --gradient-primary: linear-gradient(90deg, #165DFF 0%, #4080FF 100%);
    --gradient-primary-v: linear-gradient(0deg, #165DFF 0%, #4080FF 100%);
    --gradient-subtle: linear-gradient(90deg, rgba(22, 93, 255, 0.03) 0%, rgba(64, 128, 255, 0.03) 100%);
    --gradient-text: linear-gradient(90deg, #165DFF 0%, #4080FF 100%);
    --gradient-bg: linear-gradient(135deg, #f5f7ff 0%, #eef2ff 100%);
    --gradient-footer: linear-gradient(180deg, rgba(29, 33, 41, 0) 0%, rgba(29, 33, 41, 0.8) 100%); /* 新增：页脚顶部渐变过渡 */
    --gradient-card-dark: linear-gradient(135deg, rgba(39, 46, 59, 0.8) 0%, rgba(29, 33, 41, 0.8) 100%); /* 新增：深色磨砂卡片渐变 */

    /* 过渡 */
    --transition-fast: all 0.2s ease;
    --transition-normal: all 0.3s ease;
    --transition-slow: all 0.5s ease;
    --max-width:1120px;
}

/* ========== 基础重置 ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', sans-serif;
    color: var(--dark);
    -webkit-font-smoothing: antialiased;
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
    opacity: 0;
    transition: opacity 0.5s ease;
    position: relative;
    padding-bottom: 0; /* 适配优化后的页脚 */
    overflow-x: hidden;
}

.fullscreen
{
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 100px 0 50px;
}
/* ========== 通用工具类 ========== */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 1rem;
}

.container-header{
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    margin-bottom: 4rem;
}
.text-center{
    text-align: center;
}
.container-sm {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 1rem;
}

.container-md {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* ========== 语义化样式类 - 新增更多磨砂玻璃样式 ========== */
/* 标签徽章 */
.badge {
    display: inline-block;
    padding: 0.375rem 0.75rem;
    border-radius: 999px;
    background-color: rgba(22, 93, 255, 0.1);
    color: var(--primary);
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 1.25rem;
    backdrop-filter: blur(4px);
}

/* 基础磨砂玻璃卡片 */
.card {
    border: 1px solid rgba(255, 255, 255, 0.6);
    border-radius: 0.75rem;
    transition: all 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
    background: rgba(255, 255, 255, 1);
    box-shadow:
            var(--shadow-hover),
            inset 0 1px 0 rgba(255, 255, 255, 0.8);
    overflow: hidden;
}

.card:hover {
    transform: translateY(-2px);
    background: rgba(255, 255, 255, 0.6);
    border-color: rgba(255, 255, 255, 0.9);
}
.glass-card {
    border: 1px solid rgba(255, 255, 255, 0.6);
    border-radius: 0.75rem;
    transition: all 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
    background: rgba(255, 255, 255, 1);
    box-shadow:
            var(--shadow-hover),
            inset 0 1px 0 rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(4px);
    overflow: hidden;
}


/* 深色磨砂玻璃卡片 - 增强渐变质感 */
.card-dark {
    background: var(--gradient-card-dark); /* 应用深色渐变 */
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.15); /* 加深边框透明度 */
    border-radius: 0.75rem;
    box-shadow:
            0 8px 24px -4px rgba(0, 0, 0, 0.15),
            inset 0 1px 0 rgba(255, 255, 255, 0.08);
    transition: var(--transition-normal);
}

.card-dark:hover {
    background: linear-gradient(135deg, rgba(39, 46, 59, 0.9) 0%, rgba(29, 33, 41, 0.9) 100%);
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}


/* 主按钮 */
.btn-primary {
    background: var(--gradient-primary);
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 0.75rem;
    font-weight: 500;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition-normal);
    border: none;
    cursor: pointer;
    backdrop-filter: blur(4px);
    box-shadow: var(--shadow-btn);
}

.btn-primary:hover {
    box-shadow: 0 6px 20px rgba(22, 93, 255, 0.4);
    transform: translateY(-1px);
}

/* 次要按钮 */
.btn-secondary {
    border: 1px solid rgba(255, 255, 255, 0.5);
    background: rgba(255, 255, 255, 0.2);
    color: var(--primary);
    padding: 0.75rem 1.5rem;
    border-radius: 0.75rem;
    font-weight: 500;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition-fast);
    backdrop-filter: blur(8px);
    box-shadow: 0 2px 8px rgba(22, 93, 255, 0.08);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.3);
    border-color: rgba(255, 255, 255, 0.8);
    box-shadow: 0 4px 12px rgba(22, 93, 255, 0.12);
}

/* 页面标题 */
.page-title {
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    font-weight: 700;
    margin-bottom: 1.25rem;
    letter-spacing: -0.02em;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.02);
}

/* 渐变文字 */
.text-gradient {
    background-clip: text;
    -webkit-background-clip: text;
    color: transparent;
    background-image: var(--gradient-text);
}

/* 段落文本 */
.text-body {
    font-size: 1.125rem;
    color: var(--muted);
    line-height: 1.6;
    max-width: 640px;
    margin: 0 auto;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.02);
}

/* ========== 布局样式 ========== */
/* 导航栏 */
.navbar {
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 50;
    transition: var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
}
.navbar.active {
    background: rgba(255, 255, 255, 0.8);
    box-shadow: var(--shadow-elevated);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.navbar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: var(--max-width);
    width: 100%;
    padding: 1rem 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-icon {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 0.5rem;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-elevated);
    color: white;
    font-size: 1.125rem;
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.03);
}
.nav-links {
    display: none;
    align-items: center;
    gap: 2rem;
}

@media (min-width: 768px) {
    .nav-links {
        display: flex;
    }
}

.nav-links a {
    color: var(--neutral);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-fast);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.02);
}

.nav-links a:hover {
    color: var(--primary);
}

.mobile-menu-btn {
    display: block;
    color: var(--neutral);
    font-size: 1.25rem;
    background: none;
    border: none;
    cursor: pointer;
    backdrop-filter: blur(4px);
    padding: 0.5rem;
    border-radius: 0.5rem;
}

@media (min-width: 768px) {
    .mobile-menu-btn {
        display: none;
    }
}

.mobile-menu {
    position: absolute;
    width: 100%;
    left: 0;
    top: 100%;
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: var(--transition-normal);
    padding: 1.25rem 1rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.mobile-menu a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 0;
    transition: var(--transition-fast);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.mobile-menu a:hover {
    color: var(--accent);
}

/* 英雄区域 */
.hero {
    background: var(--gradient-subtle);
}
.banner-bg {
    background-image: url(/assets/image/banner_bg.jpg);
    background-size: cover;
    background-position: center;
    padding: 150px 0 75px;
    position: relative;
    z-index: 1;

}
.hero-inner {
    display: flex;
    flex-direction: column;
    gap: 3rem;
    padding: 2rem 0;
}

@media (min-width: 768px) {
    .hero-inner {
        flex-direction: row;
        align-items: center;
        gap: 5rem;
    }
}

.hero-content {
    display: flex;
    flex-direction: column;
    gap: 1.75rem;
    padding: 2rem 0;
}

.hero-title {
    font-size: 3.3rem;
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: 0.02em;
    margin-bottom: 1.7rem;
}

.hero-desc {
    font-size: 1rem;
    color: var(--muted);
    line-height: 1.5;
    max-width: 400px;
}

.hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin-top: 1rem;
}

.hero-platforms {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    color: var(--muted);
    padding-top: 1rem;
    gap: 1rem;
}

@media (min-width: 768px) {
    .hero-platforms {
        gap: 1.5rem;
    }
}

.platform-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
}

/* 首屏图片放大修改 */
.hero-image {
    flex: 1.2;
    position: relative;
}

.hero-image img {
    width: 100%;
    max-width: 800px;
    height: auto;
    border-radius: 1rem;
    box-shadow: 0 12px 36px rgba(0,0,0,0.15);
    transform: perspective(1000px) translateY(0) scale(1.02);
    transition: var(--transition-slow);
}

.hero-image:hover img {
    transform: perspective(1000px) translateY(-5px) scale(1.03);
}


.image-badge-1 {
    position: absolute;
    top: -1rem;
    right: -1rem;
    padding: 1rem;
    border-radius: 0.75rem;
    box-shadow: var(--shadow-elevated);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    background-color: rgba(255,255,255, 0.5);
    z-index: 2;
}

.badge-icon {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    background: rgba(34, 197, 94, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #16a34a;
    backdrop-filter: blur(4px);
    border: 1px solid rgba(34, 197, 94, 0.15);
}

.badge-text {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--dark);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.02);
}

.badge-subtext {
    font-size: 0.75rem;
    color: var(--neutral);
}

.image-badge-2 {
    position: absolute;
    bottom: -0.75rem;
    left: -0.75rem;
    padding: 0.375rem 0.75rem;
    border-radius: 0.5rem;
    background: var(--gradient-primary);
    color: white;
    font-size: 0.75rem;
    font-weight: 500;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    backdrop-filter: blur(4px);
    z-index: 2;
}

/* 功能区域 */
.features {
    padding: 5rem 1rem;
    background: #f5f6f8;
    margin: 2rem 0;
}

.features-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

@media (min-width: 640px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.feature-card {
    padding: 1.5rem;
}

.feature-icon {
    width: 3rem;
    height: 3rem;
    border-radius: 0.75rem;
    background: rgba(22, 93, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 1.25rem;
    margin-bottom: 1.25rem;
    backdrop-filter: blur(4px);
    border: 1px solid rgba(22, 93, 255, 0.08);
}

.feature-title {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--neutral);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.02);
}

.feature-desc {
    font-size: 0.875rem;
    color: var(--muted);
    line-height: 1.6;
}

/* 截图区域 */
.screenshots {
    background: #fff;
    padding: 5rem 1rem;
}

.screenshots-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

@media (min-width: 768px) {
    .screenshots-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.screenshot-item {
    border-radius: 0.75rem;
    overflow: hidden;
    box-shadow: 0 8px 24px rgba(0,0,0,0.1);
    transition: var(--transition-normal);
    backdrop-filter: blur(4px);
    border: 1px solid rgba(255, 255, 255, 0.5);
}

.screenshot-item:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-4px);
    border-color: rgba(255, 255, 255, 0.8);
}

.screenshot-item img {
    width: 100%;
    height: auto;
    display: block;
    opacity: 0.95;
}

/* 下载区域 */
.download {
    padding: 5rem 1rem;
    background:#f5f6f8;
}

.download-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

@media (min-width: 768px) {
    .download-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.download-card {
    padding: 2rem;
    text-align: center;
}

.download-icon {
    width: 4rem;
    height: 4rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 2rem;
    backdrop-filter: blur(4px);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.download-icon.windows {
    background: rgba(59, 130, 246, 0.1);
    color: #3b82f6;
}

.download-icon.macos {
    background: rgba(107, 114, 128, 0.1);
    color: #6b7280;
}

.download-icon.linux {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
}

.download-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--neutral);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.02);
}

.download-desc {
    font-size: 0.875rem;
    color: var(--muted);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.download-version {
    font-size: 0.75rem;
    color: var(--muted);
    margin-top: 1rem;
}

.download-note {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1.25rem;
    border-radius: 0.75rem;
    background: rgba(255, 255, 255, 0.4);
    box-shadow: var(--shadow-elevated);
    margin: 3rem auto 1.25rem;
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.6);
}

.download-note-text {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--neutral);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.02);
}

.changelog-link {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
    font-size: 1rem;
    display: inline-block;
    margin-top: 1.25rem;
    transition: var(--transition-fast);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.02);
}

.changelog-link:hover {
    color: var(--secondary);
    text-decoration: underline;
}

/* FAQ区域 */
.faq {
    padding: 5rem 1rem;
    position: relative;

}
.faq-list {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.faq-item {
    border-radius: 0.75rem;
    overflow: hidden;
    box-shadow: var(--shadow-glass);
}

.faq-toggle {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.5rem;
    text-align: left;
    background: transparent;
    border: none;
    font-weight: 600;
    font-size: 1rem;
    color: var(--neutral);
    cursor: pointer;
    outline: none;
    transition: var(--transition-fast);
}

.faq-toggle:hover {
    background: rgba(255, 255, 255, 0.2);
}

.faq-icon {
    color: var(--muted);
    transition: transform 0.2s ease;
}

.faq-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    padding: 0 1.5rem;
}

.faq-text {
    padding-bottom: 1.5rem;
    font-size: 0.875rem;
    color: var(--muted);
    line-height: 1.6;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.02);
}


/* 页脚 - 配色优化 + 新增磨砂元素 */
.footer {
    color: white;
    padding: 5rem 1rem 3rem; /* 增加顶部内边距 */
    position: relative;
    z-index: 2;
}
.footer-bg{
    position: absolute;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100%;
    background-image: url(/assets/image/6.png);
    background-size:  auto 500px;
    background-repeat: no-repeat;
    background-position: bottom center ;
    background-attachment: fixed;
    background-color: #000;
    z-index: 0;
}
/* 新增：页脚背景装饰 */
.footer::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    backdrop-filter: blur(8px);
}
.footer .container {
    z-index: 2;
    position: relative;
}
.footer-top {
    display: flex;
    flex-direction: column;
    gap: 3rem; /* 增加间距 */
    margin-bottom: 3rem; /* 增加底部间距 */
}

@media (min-width: 768px) {
    .footer-top {
        flex-direction: row;
        justify-content: space-between;
    }
}

.footer-brand {
    flex: 1;
    max-width: 33.333%;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.footer-brand .logo {
    margin-bottom: 0.5rem;
}

.footer-desc {
    color: var(--muted);
    font-size: 1rem;
    line-height: 1.6;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.social-links {
    display: flex;
    gap: 1.25rem;
}

.social-links a {
    color: var(--muted);
    font-size: 1.25rem;
    transition: var(--transition-fast);
    backdrop-filter: blur(8px); /* 增强社交图标磨砂效果 */
    padding: 0.75rem; /* 增加点击区域 */
    border-radius: 0.75rem; /* 增大圆角 */
    border: 1px solid rgba(255, 255, 255, 0.1);
    width: 3rem;
    height: 3rem;
    text-align: center;
}
.social-links a .icon{
    width: 1.5rem;
    height: 1.5rem;
}
.social-links a.wechat{
    background-color: rgba(0, 198, 0, 0.1);
}
.social-links a.qqgroup{
    background-color: rgba(1, 178, 243,0.1);
}
.social-links a.bilibili{
    background-color: rgba(249, 116, 155,0.1);
}
.social-links a:hover {
    color: white;
    background: var(--footer-hover); /* 使用新增hover背景色 */
    border-color: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
}
.social-links a.wechat:hover{
    background-color: rgba(0, 198, 0, 0.25);
}
.social-links a.qqgroup:hover{
    background-color: rgba(1, 178, 243,0.25);
}
.social-links a.bilibili:hover{
    background-color: rgba(249, 116, 155,0.25);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2.5rem; /* 增加间距 */
    flex: 2;
}

@media (min-width: 768px) {
    .footer-links {
        grid-template-columns: repeat(3, 1fr);
    }
}

.footer-link-group {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.footer-link-group h4 {
    font-size: 1.125rem; /* 增大标题字体 */
    font-weight: 700;
    margin-bottom: 0.5rem;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
    color: var(--white);
}

.footer-link-group ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.875rem; /* 增加列表间距 */
}

.footer-link-group a {
    color: var(--muted);
    text-decoration: none;
    font-size: 0.875rem;
    transition: var(--transition-fast);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
    padding: 0.25rem 0;
}

.footer-link-group a:hover {
    color: white;
    padding-left: 0.5rem; /* 新增hover位移效果 */
}

/* 新增：页脚订阅区域 - 磨砂玻璃样式 */
.footer-subscribe {
    margin-top: 2rem;
    padding: 1.5rem;
    background: rgba(29, 33, 41, 0.5);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: 1rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.subscribe-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--white);
}

.subscribe-form {
    display: flex;
    gap: 0.75rem;
}




.subscribe-btn {
    padding: 0.75rem 1.25rem;
    background: var(--gradient-primary);
    border: none;
    border-radius: 0.75rem;
    color: white;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-fast);
}

.subscribe-btn:hover {
    box-shadow: 0 4px 12px rgba(22, 93, 255, 0.3);
    transform: translateY(-1px);
}

.footer-bottom {
    padding-top: 2.5rem; /* 增加顶部间距 */
    border-top: 1px solid rgba(78, 89, 105, 0.25); /* 加深分割线 */
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem; /* 增加间距 */
}

@media (min-width: 768px) {
    .footer-bottom {
        flex-direction: row;
        justify-content: space-between;
    }
}

.copyright {
    font-size: 0.875rem; /* 增大版权文字 */
    color: var(--muted);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
    text-align: center;
}
.copyright a {
    color: var(--muted);
    text-decoration: none;
    transition: var(--transition-fast);
}
.copyright a:hover {
    color: var(--secondary);
}
.footer-bottom-links {
    display: flex;
    gap: 1.5rem; /* 增加链接间距 */
    flex-wrap: wrap;
    justify-content: center;
}

.footer-bottom-links a {
    color: var(--muted);
    font-size: 0.875rem; /* 增大链接文字 */
    text-decoration: none;
    transition: var(--transition-fast);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

.footer-bottom-links a:hover {
    color: white;
    text-decoration: underline;
}

/* 自定义滚动条 */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: rgba(29, 33, 41, 0.03);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb {
    background: rgba(22, 93, 255, 0.15);
    border-radius: 3px;
    backdrop-filter: blur(2px);
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(22, 93, 255, 0.25);
}

/* 滚动到顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 3rem;
    height: 3rem;
    border-radius: 50%;
    background: var(--gradient-primary-v);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    box-shadow: var(--shadow-btn);
    border: 1px solid rgba(255, 255, 255, 0.2);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 100;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateZ(10px) translateY(0);
}

.back-to-top:hover {
    transform: translateZ(10px) scale(1.1) rotateY(10deg);
    box-shadow: 0 8px 24px rgba(22, 93, 255, 0.4);
    background: rgba(22, 93, 255, 0.9);
    border-color: rgba(255, 255, 255, 0.4);
}


/* 响应式调整 */
@media (max-width: 768px) {
    .back-to-top {
        bottom: 1.5rem;
        right: 1.5rem;
        width: 2.5rem;
        height: 2.5rem;
        font-size: 1rem;
    }
    .features, .screenshots, .download, .faq {
        border-radius: 1rem;
        margin: 1rem 0;
        padding: 3rem 1rem;
    }
    .hero-content {
        padding: 1.5rem;
    }
    .footer {
        padding: 3rem 1rem 2rem;
    }
    .footer-brand {
        max-width: 100%;
    }
    .subscribe-form {
        flex-direction: column;
    }
}