/* ====================================================
   Sandboxie Plus 官方推广网站 - 主样式表
   配色基于品牌Logo：亮黄/红/紫/黑
   风格：扁平现代专业
   ==================================================== */

/* ===== CSS 变量定义 ===== */
:root {
    /* 品牌主色 */
    --color-primary: #DFFF00;        /* 亮黄/柠檬黄 - 主品牌色 */
    --color-primary-dark: #C4E600;   /* 深亮黄 - hover态 */
    --color-primary-light: #F0FF66;  /* 浅亮黄 - 背景强调 */
    --color-accent: #A020F0;         /* 紫色 - Plus符号 */
    --color-accent-dark: #8B1FD1;
    --color-danger: #FF3B30;         /* 红色 - 警示/强调 */
    --color-dark: #1A1A1A;           /* 主文字色 */
    --color-dark-2: #2D2D2D;
    --color-gray-900: #212529;
    --color-gray-700: #495057;
    --color-gray-500: #6C757D;
    --color-gray-300: #DEE2E6;
    --color-gray-200: #E9ECEF;
    --color-gray-100: #F8F9FA;
    --color-gray-50: #FCFCFD;
    --color-white: #FFFFFF;

    /* 字体 */
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
                 "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue",
                 Helvetica, Arial, sans-serif;
    --font-mono: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono",
                 Consolas, "Courier New", monospace;

    /* 间距 */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;

    /* 圆角 */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 20px;
    --radius-full: 9999px;

    /* 阴影 */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.10);
    --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.15);
    --shadow-primary: 0 8px 24px rgba(223, 255, 0, 0.35);

    /* 过渡 */
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);

    /* 布局 */
    --container-max: 1200px;
    --header-h: 70px;
}

/* ===== 重置样式 ===== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-gray-900);
    background-color: var(--color-white);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition);
}

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

ul, ol {
    list-style: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* ===== 排版 ===== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.25;
    color: var(--color-dark);
    letter-spacing: -0.02em;
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.75rem, 3.5vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 2.5vw, 1.5rem); }
h4 { font-size: 1.125rem; }

p { margin-bottom: 1rem; }

.text-primary { color: var(--color-primary); }
.text-accent { color: var(--color-accent); }
.text-danger { color: var(--color-danger); }
.text-center { text-align: center; }
.text-mono { font-family: var(--font-mono); }

/* ===== 布局容器 ===== */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-xl);
}

.section {
    padding: var(--space-4xl) 0;
}

.section-sm {
    padding: var(--space-3xl) 0;
}

.section-bg-light {
    background-color: var(--color-gray-100);
}

.section-bg-dark {
    background-color: var(--color-dark);
    color: var(--color-white);
}

.section-bg-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-dark);
}

/* ===== 区块标题 ===== */
.section-header {
    text-align: center;
    max-width: 720px;
    margin: 0 auto var(--space-3xl);
}

.section-header h2 {
    margin-bottom: var(--space-md);
}

.section-header .eyebrow {
    display: inline-block;
    padding: 6px 14px;
    background: var(--color-primary-light);
    color: var(--color-dark);
    font-size: 0.8125rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    border-radius: var(--radius-full);
    margin-bottom: var(--space-md);
}

.section-header p {
    font-size: 1.0625rem;
    color: var(--color-gray-700);
    margin-bottom: 0;
}

.section-bg-dark .section-header h2,
.section-bg-primary .section-header h2 {
    color: inherit;
}

.section-bg-dark .section-header p {
    color: rgba(255, 255, 255, 0.75);
}

.section-bg-primary .section-header p {
    color: rgba(26, 26, 26, 0.75);
}

/* ===== 按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    font-size: 1rem;
    font-weight: 700;
    border-radius: var(--radius-md);
    transition: var(--transition);
    cursor: pointer;
    text-align: center;
    line-height: 1.2;
    border: 2px solid transparent;
    white-space: nowrap;
}

.btn svg, .btn i {
    width: 18px;
    height: 18px;
}

.btn-primary {
    background-color: var(--color-primary);
    color: var(--color-dark);
    box-shadow: var(--shadow-primary);
}

.btn-primary:hover {
    background-color: var(--color-primary-dark);
    color: var(--color-dark);
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(223, 255, 0, 0.5);
}

.btn-dark {
    background-color: var(--color-dark);
    color: var(--color-white);
}

.btn-dark:hover {
    background-color: var(--color-dark-2);
    color: var(--color-primary);
    transform: translateY(-2px);
}

.btn-outline {
    background-color: transparent;
    color: var(--color-dark);
    border-color: var(--color-gray-300);
}

.btn-outline:hover {
    border-color: var(--color-dark);
    background-color: var(--color-dark);
    color: var(--color-white);
    transform: translateY(-2px);
}

.btn-outline-light {
    background-color: transparent;
    color: var(--color-white);
    border-color: rgba(255, 255, 255, 0.4);
}

.btn-outline-light:hover {
    border-color: var(--color-white);
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--color-white);
}

.btn-lg {
    padding: 16px 36px;
    font-size: 1.125rem;
}

.btn-block {
    display: flex;
    width: 100%;
}

/* ===== 顶部导航 ===== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-h);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: saturate(180%) blur(12px);
    -webkit-backdrop-filter: saturate(180%) blur(12px);
    border-bottom: 1px solid var(--color-gray-200);
    z-index: 1000;
    transition: var(--transition);
}

.site-header.scrolled {
    box-shadow: var(--shadow-md);
}

.navbar {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    font-size: 1.25rem;
    color: var(--color-dark);
}

.brand img {
    height: 38px;
    width: auto;
}

.brand-name {
    display: flex;
    align-items: baseline;
    gap: 2px;
}

.brand-name .plus {
    color: var(--color-accent);
    font-size: 1.5rem;
    font-weight: 900;
}

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

.nav-menu a {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--color-gray-700);
    padding: 8px 0;
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: var(--transition);
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--color-dark);
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
    width: 100%;
}

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

.nav-download-btn {
    padding: 10px 22px;
    background: var(--color-primary);
    color: var(--color-dark);
    font-weight: 700;
    border-radius: var(--radius-md);
    font-size: 0.9375rem;
    transition: var(--transition);
    box-shadow: var(--shadow-primary);
}

.nav-download-btn:hover {
    background: var(--color-primary-dark);
    transform: translateY(-1px);
    color: var(--color-dark);
}

/* 移动端汉堡菜单 */
.menu-toggle {
    display: none;
    width: 32px;
    height: 32px;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    cursor: pointer;
}

.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-dark);
    transition: var(--transition);
    border-radius: 2px;
}

.menu-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ===== Hero 区块 ===== */
.hero {
    position: relative;
    padding: calc(var(--header-h) + var(--space-4xl)) 0 var(--space-4xl);
    background: radial-gradient(circle at 20% 30%, rgba(223, 255, 0, 0.12) 0%, transparent 50%),
                radial-gradient(circle at 80% 70%, rgba(160, 32, 240, 0.08) 0%, transparent 50%),
                linear-gradient(180deg, #FAFBFC 0%, #FFFFFF 100%);
    overflow: hidden;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: var(--space-3xl);
    align-items: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    background: var(--color-white);
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-full);
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-gray-700);
    margin-bottom: var(--space-lg);
    box-shadow: var(--shadow-sm);
}

.hero-badge .dot {
    width: 8px;
    height: 8px;
    background: var(--color-danger);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.6; transform: scale(1.2); }
}

.hero h1 {
    margin-bottom: var(--space-lg);
}

.hero h1 .highlight {
    color: var(--color-dark);
    background: linear-gradient(120deg, transparent 0%, transparent 60%, var(--color-primary) 60%, var(--color-primary) 100%);
    padding: 0 4px;
}

.hero h1 .plus-sign {
    color: var(--color-accent);
}

.hero-subtitle {
    font-size: 1.1875rem;
    color: var(--color-gray-700);
    margin-bottom: var(--space-xl);
    max-width: 540px;
}

.hero-actions {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
    margin-bottom: var(--space-xl);
}

.hero-stats {
    display: flex;
    gap: var(--space-2xl);
    flex-wrap: wrap;
}

.hero-stat .num {
    font-size: 2rem;
    font-weight: 800;
    color: var(--color-dark);
    line-height: 1;
}

.hero-stat .label {
    font-size: 0.875rem;
    color: var(--color-gray-500);
    margin-top: 4px;
}

/* Hero 视觉图 */
.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-mockup {
    position: relative;
    width: 100%;
    max-width: 520px;
    background: var(--color-white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    border: 1px solid var(--color-gray-200);
}

.hero-mockup-bar {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 12px 16px;
    background: var(--color-gray-100);
    border-bottom: 1px solid var(--color-gray-200);
}

.hero-mockup-bar .dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.hero-mockup-bar .dot.red { background: #FF5F57; }
.hero-mockup-bar .dot.yellow { background: #FEBC2E; }
.hero-mockup-bar .dot.green { background: #28C840; }

.hero-mockup-bar .title {
    margin-left: 12px;
    font-size: 0.8125rem;
    color: var(--color-gray-500);
    font-weight: 500;
}

.hero-mockup-content {
    padding: var(--space-lg);
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    line-height: 1.6;
    color: var(--color-gray-700);
    background: #1E1E1E;
    color: #E0E0E0;
}

.hero-mockup-content .cmd-line {
    margin-bottom: 6px;
}

.hero-mockup-content .prompt {
    color: var(--color-primary);
}

.hero-mockup-content .ok {
    color: #28C840;
}

.hero-mockup-content .warn {
    color: #FEBC2E;
}

.hero-mockup-content .info {
    color: #61DAFB;
}

/* 漂浮卡片 */
.floating-card {
    position: absolute;
    background: var(--color-white);
    border-radius: var(--radius-md);
    padding: 12px 16px;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.875rem;
    font-weight: 600;
    border: 1px solid var(--color-gray-200);
    animation: float 3s ease-in-out infinite;
}

.floating-card.top-left {
    top: 10%;
    left: -5%;
    animation-delay: 0s;
}

.floating-card.bottom-right {
    bottom: 8%;
    right: -3%;
    animation-delay: 1.5s;
}

.floating-card .icon {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
    flex-shrink: 0;
}

.floating-card .icon.green {
    background: #28C840;
}

.floating-card .icon.purple {
    background: var(--color-accent);
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-12px); }
}

/* ===== 使用场景 ===== */
.scenarios-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-xl);
}

.scenario-card {
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.scenario-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--color-primary);
    transform: scaleY(0);
    transform-origin: bottom;
    transition: var(--transition);
}

.scenario-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.scenario-card:hover::before {
    transform: scaleY(1);
    transform-origin: top;
}

.scenario-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    background: var(--color-primary-light);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-md);
    color: var(--color-dark);
}

.scenario-icon svg {
    width: 28px;
    height: 28px;
}

.scenario-card h3 {
    margin-bottom: var(--space-sm);
}

.scenario-card p {
    color: var(--color-gray-700);
    font-size: 0.9375rem;
    margin-bottom: 0;
}

/* ===== 功能特性 ===== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--space-xl);
}

.feature-card {
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}

.feature-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    background: var(--color-dark);
    color: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-md);
}

.feature-icon svg {
    width: 24px;
    height: 24px;
}

.feature-card h3 {
    margin-bottom: var(--space-sm);
    font-size: 1.125rem;
}

.feature-card p {
    color: var(--color-gray-700);
    font-size: 0.9375rem;
    margin-bottom: 0;
}

/* ===== 用户评价 ===== */
.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-xl);
}

.testimonial-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-gray-200);
    transition: var(--transition);
    position: relative;
}

.testimonial-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.testimonial-card .quote-mark {
    font-size: 4rem;
    line-height: 1;
    color: var(--color-primary);
    font-family: Georgia, serif;
    position: absolute;
    top: 16px;
    right: 20px;
    opacity: 0.5;
}

.testimonial-stars {
    display: flex;
    gap: 2px;
    margin-bottom: var(--space-md);
    color: #FFB400;
}

.testimonial-stars svg {
    width: 18px;
    height: 18px;
}

.testimonial-text {
    font-size: 0.9375rem;
    color: var(--color-gray-900);
    line-height: 1.7;
    margin-bottom: var(--space-lg);
    position: relative;
    z-index: 1;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 12px;
}

.testimonial-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
    font-weight: 700;
    font-size: 1rem;
    flex-shrink: 0;
}

.testimonial-author-info .name {
    font-weight: 700;
    color: var(--color-dark);
    font-size: 0.9375rem;
}

.testimonial-author-info .role {
    font-size: 0.8125rem;
    color: var(--color-gray-500);
}

/* ===== 数据统计 ===== */
.stats-section {
    background: var(--color-dark);
    color: var(--color-white);
    padding: var(--space-3xl) 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--space-xl);
    text-align: center;
}

.stat-item .num {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    color: var(--color-primary);
    line-height: 1;
    margin-bottom: 8px;
}

.stat-item .label {
    font-size: 0.9375rem;
    color: rgba(255, 255, 255, 0.7);
}

/* ===== 对比表 ===== */
.comparison-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--color-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.comparison-table th,
.comparison-table td {
    padding: 16px 20px;
    text-align: left;
    border-bottom: 1px solid var(--color-gray-200);
}

.comparison-table th {
    background: var(--color-gray-100);
    font-weight: 700;
    color: var(--color-dark);
    font-size: 0.9375rem;
}

.comparison-table th.highlight {
    background: var(--color-primary);
    color: var(--color-dark);
}

.comparison-table td.feature-name {
    font-weight: 600;
    color: var(--color-dark);
}

.comparison-table .check {
    color: #28C840;
    font-size: 1.25rem;
    font-weight: 700;
}

.comparison-table .cross {
    color: var(--color-gray-300);
    font-size: 1.25rem;
    font-weight: 700;
}

.comparison-table tr:last-child th,
.comparison-table tr:last-child td {
    border-bottom: none;
}

.comparison-table tbody tr:hover {
    background: var(--color-gray-50);
}

/* ===== CTA 区块 ===== */
.cta-section {
    background: linear-gradient(135deg, var(--color-dark) 0%, #2D2D2D 100%);
    color: var(--color-white);
    padding: var(--space-4xl) 0;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(223, 255, 0, 0.15) 0%, transparent 70%);
    pointer-events: none;
}

.cta-content {
    text-align: center;
    max-width: 720px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.cta-content h2 {
    color: var(--color-white);
    margin-bottom: var(--space-md);
}

.cta-content p {
    color: rgba(255, 255, 255, 0.75);
    font-size: 1.125rem;
    margin-bottom: var(--space-xl);
}

.cta-actions {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* ===== 页脚 ===== */
.site-footer {
    background: #0F0F0F;
    color: rgba(255, 255, 255, 0.7);
    padding: var(--space-3xl) 0 var(--space-xl);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr repeat(3, 1fr);
    gap: var(--space-2xl);
    margin-bottom: var(--space-2xl);
}

.footer-brand .brand {
    color: var(--color-white);
    margin-bottom: var(--space-md);
}

.footer-brand p {
    font-size: 0.9375rem;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: var(--space-md);
    max-width: 320px;
}

.footer-social {
    display: flex;
    gap: 12px;
}

.footer-social a {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition);
}

.footer-social a:hover {
    background: var(--color-primary);
    color: var(--color-dark);
    transform: translateY(-2px);
}

.footer-social svg {
    width: 18px;
    height: 18px;
}

.footer-col h4 {
    color: var(--color-white);
    font-size: 0.9375rem;
    font-weight: 700;
    margin-bottom: var(--space-md);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col ul li a {
    font-size: 0.9375rem;
    color: rgba(255, 255, 255, 0.6);
}

.footer-col ul li a:hover {
    color: var(--color-primary);
}

.footer-bottom {
    padding-top: var(--space-xl);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-md);
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.5);
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.5);
}

.footer-bottom a:hover {
    color: var(--color-primary);
}

/* ===== 下载弹窗 ===== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-md);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
	  left: 0;
	  right: 0;
	  top: 0;
	  bottom: 0;
}
button { outline: none }
.modal {
    background: var(--color-white);
    border-radius: var(--radius-xl);
    max-width: 720px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    transform: scale(0.9) translateY(20px);
    transition: var(--transition-slow);
    position: relative;
}

.modal-overlay.active .modal {
    transform: scale(1) translateY(0);
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--color-gray-100);
    color: var(--color-gray-700);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    line-height: 1;
    transition: var(--transition);
    z-index: 10;
}

.modal-close:hover {
    background: var(--color-gray-200);
    color: var(--color-dark);
    transform: rotate(90deg);
}

.modal-header {
    padding: var(--space-xl) var(--space-xl) var(--space-md);
    text-align: center;
    border-bottom: 1px solid var(--color-gray-200);
}

.modal-header .badge {
    display: inline-block;
    padding: 4px 12px;
    background: var(--color-primary-light);
    color: var(--color-dark);
    font-size: 0.75rem;
    font-weight: 700;
    border-radius: var(--radius-full);
    margin-bottom: var(--space-sm);
}

.modal-header h3 {
    font-size: 1.5rem;
    margin-bottom: var(--space-xs);
}

.modal-header p {
    color: var(--color-gray-700);
    font-size: 0.9375rem;
    margin-bottom: 0;
}

.modal-body {
    padding: var(--space-xl);
}

.qr-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.qr-item {
    text-align: center;
    padding: var(--space-lg);
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    transition: var(--transition);
}

.qr-item:hover {
    border-color: var(--color-primary);
    background: var(--color-gray-50);
}

.qr-item img {
    width: 180px;
    height: 180px;
    margin: 0 auto var(--space-md);
    border-radius: var(--radius-md);
}

.qr-item .qr-title {
    font-weight: 700;
    color: var(--color-dark);
    font-size: 1rem;
    margin-bottom: 4px;
}

.qr-item .qr-desc {
    font-size: 0.8125rem;
    color: var(--color-gray-500);
    margin-bottom: var(--space-sm);
}

.qr-item .qr-size {
    display: inline-block;
    padding: 3px 10px;
    background: var(--color-gray-100);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    color: var(--color-gray-700);
    font-family: var(--font-mono);
}

.modal-footer {
    background: var(--color-gray-50);
    padding: var(--space-lg) var(--space-xl);
    border-top: 1px solid var(--color-gray-200);
    text-align: center;
    font-size: 0.875rem;
    color: var(--color-gray-500);
}

.modal-footer a {
    color: var(--color-accent);
    font-weight: 600;
}

.modal-footer a:hover {
    text-decoration: underline;
}

/* ===== 页面通用 Banner ===== */
.page-banner {
    padding: calc(var(--header-h) + var(--space-3xl)) 0 var(--space-3xl);
    background: radial-gradient(circle at 30% 50%, rgba(223, 255, 0, 0.10) 0%, transparent 50%),
                linear-gradient(180deg, #FAFBFC 0%, #FFFFFF 100%);
    text-align: center;
}

.page-banner .container {
    max-width: 800px;
}

.breadcrumb {
    display: flex;
    justify-content: center;
    gap: 8px;
    font-size: 0.875rem;
    color: var(--color-gray-500);
    margin-bottom: var(--space-md);
}

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

.breadcrumb .sep {
    color: var(--color-gray-300);
}

.page-banner h1 {
    margin-bottom: var(--space-md);
}

.page-banner p {
    font-size: 1.125rem;
    color: var(--color-gray-700);
    max-width: 640px;
    margin: 0 auto;
}

/* ===== 下载中心专用 ===== */
.download-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-xl);
    margin-bottom: var(--space-3xl);
}

.download-card {
    background: var(--color-white);
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    transition: var(--transition);
    position: relative;
}

.download-card.featured {
    border-color: var(--color-primary);
    background: linear-gradient(180deg, #FFFEEB 0%, var(--color-white) 100%);
}

.download-card.featured::before {
    content: '推荐';
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-primary);
    color: var(--color-dark);
    padding: 4px 14px;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 700;
}

.download-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.download-card .card-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-md);
    background: var(--color-gray-100);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-md);
    color: var(--color-dark);
}

.download-card.featured .card-icon {
    background: var(--color-primary);
}

.download-card .card-icon svg {
    width: 32px;
    height: 32px;
}

.download-card h3 {
    margin-bottom: var(--space-xs);
}

.download-card .version {
    font-size: 0.875rem;
    color: var(--color-gray-500);
    margin-bottom: var(--space-md);
    font-family: var(--font-mono);
}

.download-card .card-desc {
    font-size: 0.9375rem;
    color: var(--color-gray-700);
    margin-bottom: var(--space-lg);
}

.download-card .card-meta {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: var(--space-lg);
    font-size: 0.8125rem;
    color: var(--color-gray-700);
}

.download-card .card-meta li {
    display: flex;
    align-items: center;
    gap: 8px;
}

.download-card .card-meta svg {
    width: 16px;
    height: 16px;
    color: #28C840;
    flex-shrink: 0;
}

/* 系统要求 */
.sys-req-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--space-lg);
}

.sys-req-card {
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
}

.sys-req-card h4 {
    margin-bottom: var(--space-md);
    color: var(--color-dark);
    display: flex;
    align-items: center;
    gap: 8px;
}

.sys-req-card h4 .icon {
    width: 24px;
    height: 24px;
    background: var(--color-primary);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
}

.sys-req-card ul li {
    font-size: 0.9375rem;
    color: var(--color-gray-700);
    padding: 6px 0;
    padding-left: 18px;
    position: relative;
}

.sys-req-card ul li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 14px;
    width: 6px;
    height: 6px;
    background: var(--color-primary);
    border-radius: 50%;
}

/* 更新日志 */
.changelog {
    max-width: 800px;
    margin: 0 auto;
}

.changelog-item {
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    padding: var(--space-lg) var(--space-xl);
    margin-bottom: var(--space-md);
    position: relative;
    padding-left: calc(var(--space-xl) + 24px);
}

.changelog-item::before {
    content: '';
    position: absolute;
    left: var(--space-xl);
    top: var(--space-lg);
    width: 12px;
    height: 12px;
    background: var(--color-primary);
    border-radius: 50%;
    box-shadow: 0 0 0 4px rgba(223, 255, 0, 0.2);
}

.changelog-item .version-tag {
    display: inline-block;
    padding: 3px 10px;
    background: var(--color-dark);
    color: var(--color-primary);
    font-size: 0.75rem;
    font-weight: 700;
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    margin-bottom: var(--space-sm);
}

.changelog-item .date {
    font-size: 0.8125rem;
    color: var(--color-gray-500);
    margin-left: 8px;
}

.changelog-item h4 {
    margin-bottom: var(--space-sm);
}

.changelog-item ul {
    margin-top: var(--space-sm);
}

.changelog-item ul li {
    padding: 4px 0 4px 20px;
    position: relative;
    font-size: 0.9375rem;
    color: var(--color-gray-700);
}

.changelog-item ul li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: 700;
}

/* ===== 文档页专用 ===== */
.docs-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: var(--space-2xl);
    align-items: start;
}

.docs-sidebar {
    position: sticky;
    top: calc(var(--header-h) + var(--space-md));
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
}

.docs-sidebar h4 {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-gray-500);
    margin-bottom: var(--space-sm);
    padding-top: var(--space-md);
}

.docs-sidebar h4:first-child {
    padding-top: 0;
}

.docs-sidebar ul li {
    margin-bottom: 4px;
}

.docs-sidebar ul li a {
    display: block;
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    font-size: 0.9375rem;
    color: var(--color-gray-700);
    transition: var(--transition);
}

.docs-sidebar ul li a:hover,
.docs-sidebar ul li a.active {
    background: var(--color-primary-light);
    color: var(--color-dark);
    font-weight: 600;
}

.docs-content {
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
}

.docs-content h2 {
    margin-top: var(--space-xl);
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-sm);
    border-bottom: 2px solid var(--color-primary);
}

.docs-content h2:first-child {
    margin-top: 0;
}

.docs-content h3 {
    margin-top: var(--space-lg);
    margin-bottom: var(--space-sm);
}

.docs-content p {
    margin-bottom: var(--space-md);
    color: var(--color-gray-700);
}

.docs-content ul, .docs-content ol {
    margin-bottom: var(--space-md);
    padding-left: var(--space-lg);
}

.docs-content ul li,
.docs-content ol li {
    padding: 4px 0;
    color: var(--color-gray-700);
}

.docs-content ul li {
    list-style: disc;
}

.docs-content ol li {
    list-style: decimal;
}

.docs-content code {
    font-family: var(--font-mono);
    background: var(--color-gray-100);
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    font-size: 0.875em;
    color: var(--color-danger);
}

.docs-content pre {
    background: var(--color-dark);
    color: #E0E0E0;
    padding: var(--space-md);
    border-radius: var(--radius-md);
    overflow-x: auto;
    margin-bottom: var(--space-md);
    font-family: var(--font-mono);
    font-size: 0.875rem;
    line-height: 1.6;
}

.docs-content pre code {
    background: transparent;
    color: inherit;
    padding: 0;
}

.docs-content blockquote {
    border-left: 4px solid var(--color-primary);
    background: var(--color-primary-light);
    padding: var(--space-md) var(--space-lg);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    margin-bottom: var(--space-md);
}

.docs-content blockquote p {
    margin-bottom: 0;
    color: var(--color-dark);
}

.docs-content table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: var(--space-md);
}

.docs-content table th,
.docs-content table td {
    padding: 10px 14px;
    border: 1px solid var(--color-gray-200);
    text-align: left;
    font-size: 0.9375rem;
}

.docs-content table th {
    background: var(--color-gray-100);
    font-weight: 700;
}

/* ===== FAQ ===== */
.faq-list {
    max-width: 820px;
    margin: 0 auto;
}

.faq-item {
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-md);
    overflow: hidden;
    transition: var(--transition);
}

.faq-item:hover {
    border-color: var(--color-gray-300);
    box-shadow: var(--shadow-sm);
}

.faq-question {
    padding: var(--space-md) var(--space-lg);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-md);
    font-weight: 600;
    color: var(--color-dark);
    font-size: 1.0625rem;
    transition: var(--transition);
}

.faq-question:hover {
    background: var(--color-gray-50);
}

.faq-question .icon {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-accent);
    transition: var(--transition);
    font-size: 1.5rem;
    line-height: 1;
}

.faq-item.active .faq-question .icon {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 1000px;
}

.faq-answer-inner {
    padding: 0 var(--space-lg) var(--space-md);
    color: var(--color-gray-700);
    font-size: 0.9375rem;
    line-height: 1.7;
}

.faq-answer-inner p {
    margin-bottom: var(--space-sm);
}

.faq-answer-inner p:last-child {
    margin-bottom: 0;
}

/* ===== 关于我们 ===== */
.about-intro {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
    align-items: center;
}

.about-text h2 {
    margin-bottom: var(--space-md);
}

.about-text p {
    color: var(--color-gray-700);
    margin-bottom: var(--space-md);
}

.about-visual {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    border-radius: var(--radius-xl);
    padding: var(--space-3xl) var(--space-2xl);
    text-align: center;
    color: var(--color-dark);
    position: relative;
    overflow: hidden;
}

.about-visual::before {
    content: '+';
    position: absolute;
    top: -20px;
    right: -10px;
    font-size: 16rem;
    color: rgba(160, 32, 240, 0.2);
    font-weight: 900;
    line-height: 1;
}

.about-visual .big-num {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1;
    margin-bottom: var(--space-sm);
    position: relative;
    z-index: 1;
}

.about-visual .label {
    font-size: 1rem;
    font-weight: 600;
    position: relative;
    z-index: 1;
}

/* 时间线 */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    padding-left: 40px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 12px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--color-primary) 0%, var(--color-accent) 100%);
}

.timeline-item {
    position: relative;
    padding-bottom: var(--space-2xl);
}

.timeline-item:last-child {
    padding-bottom: 0;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -34px;
    top: 4px;
    width: 16px;
    height: 16px;
    background: var(--color-white);
    border: 3px solid var(--color-primary);
    border-radius: 50%;
    z-index: 1;
}

.timeline-item .year {
    display: inline-block;
    padding: 2px 10px;
    background: var(--color-dark);
    color: var(--color-primary);
    font-size: 0.8125rem;
    font-weight: 700;
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-sm);
    font-family: var(--font-mono);
}

.timeline-item h4 {
    margin-bottom: var(--space-sm);
}

.timeline-item p {
    color: var(--color-gray-700);
    font-size: 0.9375rem;
    margin-bottom: 0;
}

/* ===== 工具类 ===== */
.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--space-md); }
.mt-2 { margin-top: var(--space-xl); }
.mt-3 { margin-top: var(--space-2xl); }
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--space-md); }
.mb-2 { margin-bottom: var(--space-xl); }

.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
}

/* ===== 响应式 ===== */
@media (max-width: 992px) {
    .hero-grid {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
    }

    .hero-visual {
        order: -1;
    }

    .hero-mockup {
        max-width: 480px;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-xl);
    }

    .footer-brand {
        grid-column: span 2;
    }

    .docs-layout {
        grid-template-columns: 1fr;
    }

    .docs-sidebar {
        position: static;
    }

    .about-intro {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --space-4xl: 4rem;
        --space-3xl: 3rem;
    }

    .container {
        padding: 0 var(--space-md);
    }

    .nav-menu {
        position: fixed;
        top: var(--header-h);
        left: 0;
        right: 0;
        flex-direction: column;
        background: var(--color-white);
        padding: var(--space-lg);
        gap: var(--space-xs);
        border-bottom: 1px solid var(--color-gray-200);
        box-shadow: var(--shadow-lg);
        transform: translateY(-150%);
        transition: var(--transition);
        max-height: calc(100vh - var(--header-h));
        overflow-y: auto;
    }

    .nav-menu.active {
        transform: translateY(0);
    }

    .nav-menu a {
        width: 100%;
        padding: 12px 16px;
        border-radius: var(--radius-sm);
    }

    .nav-menu a:hover,
    .nav-menu a.active {
        background: var(--color-gray-100);
    }

    .nav-menu a::after {
        display: none;
    }

    .menu-toggle {
        display: flex;
    }

    .nav-download-btn {
        display: none;
    }

    .nav-actions .nav-download-btn {
        display: none;
    }

    /* 移动端显示底部固定下载按钮 */
    .mobile-download-bar {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        background: var(--color-white);
        border-top: 1px solid var(--color-gray-200);
        padding: 12px var(--space-md);
        z-index: 900;
        display: flex;
        gap: var(--space-sm);
        box-shadow: 0 -4px 12px rgba(0, 0, 0, 0.08);
    }

    .mobile-download-bar .btn {
        flex: 1;
        padding: 12px;
        font-size: 0.9375rem;
    }

    body {
        padding-bottom: 70px;
    }

    .hero-stats {
        gap: var(--space-lg);
    }

    .hero-stat .num {
        font-size: 1.5rem;
    }

    .floating-card {
        display: none;
    }

    .qr-grid {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
    }

    .footer-brand {
        grid-column: span 1;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }

    .grid-2, .grid-3, .grid-4 {
        grid-template-columns: 1fr;
    }

    .section {
        padding: var(--space-3xl) 0;
    }
}

@media (max-width: 480px) {
    .hero-actions {
        flex-direction: column;
    }

    .hero-actions .btn {
        width: 100%;
    }

    .modal-body {
        padding: var(--space-md);
    }

    .qr-item img {
        width: 140px;
        height: 140px;
    }
}

/* 移动端下载栏默认隐藏 */
.mobile-download-bar {
    display: none;
}