@font-face {
    font-family: 'MiSans Heavy';
    src: url('./MiSans-Heavy.woff2') format('woff2');
    font-weight: 900;
    font-style: normal;
    font-display: swap;
    /* 只加载 VoyageOS 需要的字符: V(0056) o(006F) y(0079) a(0061) g(0067) e(0065) O(004F) S(0053) */
    unicode-range: U+004F, U+0053, U+0056, U+0061, U+0065, U+0067, U+006F, U+0079;
}
:root {
    --color-primary: #111;
    --color-secondary: #333;
    --color-text: #1a1a1a;
    --color-text-secondary: #666;
    --color-text-muted: #999;
    --color-bg: #fafafa;
    --color-bg-alt: #f5f5f5;
    --color-bg-white: #ffffff;
    --color-border: #e5e5e5;
    --color-border-light: #f0f0f0;
    --color-accent: #0066ff;
    --color-accent-hover: #0052cc;
    --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;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-2xl: 24px;
    --radius-full: 9999px;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.1);
    /* ===== 液态玻璃 (Liquid Glass) 设计令牌 ===== */
    --glass-bg: rgba(255, 255, 255, 0.5);            /* 玻璃底 50% 透明度 */
    --glass-bg-strong: rgba(255, 255, 255, 0.65);
    --glass-bg-subtle: rgba(255, 255, 255, 0.35);
    --glass-border: rgba(255, 255, 255, 0.7);
    --glass-border-soft: rgba(255, 255, 255, 0.45);
    --glass-border-visible: rgba(20, 50, 110, 0.16);   /* 浅底上可见的蓝灰玻璃描边 */
    --glass-border-accent: rgba(0, 102, 255, 0.4);     /* hover 时的蓝色玻璃描边 */
    --glass-blur: blur(20px) saturate(200%);
    --glass-blur-sm: blur(12px) saturate(180%);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    --glass-shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.07);
    --glass-highlight: inset 0 1px 0 rgba(255, 255, 255, 0.9), inset 0 -1px 0 rgba(255, 255, 255, 0.18);
    --glass-highlight-soft: inset 0 1px 0 rgba(255, 255, 255, 0.6), inset 0 -1px 0 rgba(255, 255, 255, 0.1);
    --glass-accent-bg: rgba(0, 102, 255, 0.5);       /* 主按钮玻璃底 50% */
    --glass-accent-bg-hover: rgba(0, 102, 255, 0.62);
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --transition-fast: 200ms var(--ease-out);
    --transition-base: 400ms var(--ease-out);
    --transition-slow: 600ms var(--ease-out);
}
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: var(--color-bg);
}
::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-muted);
}
* {
    scrollbar-width: thin;
    scrollbar-color: var(--color-border) var(--color-bg);
}
body {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Helvetica Neue', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    font-size: 1rem;
    line-height: 1.8;
    color: var(--color-text);
    background: var(--color-bg);
    overflow-x: hidden;
    width: 100%;
}
a {
    color: inherit;
    text-decoration: none;
}
img {
    max-width: 100%;
    height: auto;
    display: block;
}
.icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1em;
    height: 1em;
    vertical-align: -0.15em;
    fill: currentColor;
    overflow: hidden;
}
.icon-sm { width: 16px; height: 16px; }
.icon-md { width: 20px; height: 20px; }
.icon-lg { width: 24px; height: 24px; }
.icon-xl { width: 32px; height: 32px; }
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: 64px;
    background: var(--glass-bg);
    /* 顶部光泽层，增强玻璃折射感（低成本纯色渐变，不触发额外模糊） */
    background-image: linear-gradient(to bottom, rgba(255, 255, 255, 0.28), rgba(255, 255, 255, 0) 60%);
    -webkit-backdrop-filter: var(--glass-blur);
    backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--glass-border-soft);
    box-shadow: var(--glass-highlight-soft);
    transition: var(--transition-base);
}
.navbar.scrolled {
    background: var(--glass-bg-strong);
    background-image: linear-gradient(to bottom, rgba(255, 255, 255, 0.32), rgba(255, 255, 255, 0) 60%);
    -webkit-backdrop-filter: var(--glass-blur);
    backdrop-filter: var(--glass-blur);
    box-shadow: var(--glass-highlight-soft), var(--glass-shadow-sm);
}
.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}
.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 600;
    font-size: 1.125rem;
    color: var(--color-primary);
}
.logo img {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-md);
}
.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    list-style: none;
}
.nav-links a {
    display: block;
    padding: var(--space-sm) var(--space-md);
    font-size: 0.9375rem;
    font-weight: 450;
    color: var(--color-text-secondary);
    border-radius: var(--radius-full);
    border: 1px solid transparent;
    transition: var(--transition-fast);
    position: relative;
}
.nav-links a:hover {
    color: var(--color-primary);
    background: rgba(0, 0, 0, 0.045);
    border-color: rgba(0, 0, 0, 0.09);
    box-shadow: var(--glass-highlight-soft);
}
.nav-links a.active {
    color: var(--color-primary);
    background: rgba(0, 0, 0, 0.06);
    border-color: rgba(0, 0, 0, 0.12);
    box-shadow: var(--glass-highlight-soft);
}
.nav-links a:active {
    transform: scale(0.96);
}
.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    background: rgba(0, 0, 0, 0.045);
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: var(--radius-full);
    box-shadow: var(--glass-highlight-soft);
    cursor: pointer;
    padding: 8px;
    transition: var(--transition-fast);
}
.menu-toggle:hover {
    background: rgba(0, 0, 0, 0.08);
    border-color: rgba(0, 0, 0, 0.14);
    transform: scale(1.05);
}
.menu-toggle:active {
    transform: scale(0.94);
}
.menu-toggle span {
    display: block;
    width: 100%;
    height: 1.5px;
    background: var(--color-primary);
    border-radius: 1px;
    transition: var(--transition-base);
    transform-origin: center;
}
.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(4px, 4px);
}
.menu-toggle.active span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}
.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(4px, -4px);
}
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: var(--color-bg);
    scroll-margin-top: 64px;
}
/* 环境光晕，为玻璃元素提供折射层次 */
.hero::before {
    content: '';
    position: absolute;
    top: -20%;
    left: 50%;
    transform: translateX(-50%);
    width: 1200px;
    height: 800px;
    background:
        radial-gradient(closest-side, rgba(0, 102, 255, 0.10), transparent),
        radial-gradient(closest-side at 30% 60%, rgba(140, 90, 255, 0.08), transparent),
        radial-gradient(closest-side at 70% 40%, rgba(0, 180, 255, 0.08), transparent);
    pointer-events: none;
    z-index: 1;
}
.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: var(--space-xl);
    max-width: 800px;
    width: 100%;
}
.hero-logo {
    width: 150px;
    height: 150px;
    margin: 0 auto var(--space-2xl);
    border-radius: var(--radius-2xl);
    background: transparent;
    box-shadow: none;
}
.hero-title {
    font-family: 'MiSans Heavy', sans-serif;
    font-size: clamp(3rem, 8vw, 5rem);
    font-weight: 900;
    color: var(--color-primary);
    line-height: 1.15;
    margin-bottom: var(--space-lg);
    letter-spacing: -0.03em;
}
.hero-subtitle {
    font-size: clamp(1.0625rem, 2vw, 1.25rem);
    color: var(--color-text-secondary);
    max-width: 500px;
    margin: 0 auto var(--space-2xl);
    line-height: 1.8;
}
.hero-actions {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
}
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 0.875rem 2rem;
    font-size: 0.9375rem;
    font-weight: 500;
    border-radius: var(--radius-full);
    border: none;
    cursor: pointer;
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
    -webkit-tap-highlight-color: transparent;
}
.btn:active {
    transform: scale(0.96);
}
.btn-primary {
    background: rgba(0, 102, 255, 0.42);
    -webkit-backdrop-filter: var(--glass-blur-sm);
    backdrop-filter: var(--glass-blur-sm);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.45);
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.55),
        inset 0 -1px 0 rgba(0, 60, 160, 0.2),
        0 8px 24px rgba(0, 102, 255, 0.28);
    text-shadow: 0 1px 2px rgba(0, 80, 200, 0.35);
}
/* 流动渐变层：左→右 天蓝→正蓝循环（色相锁定在蓝色区间，不偏紫），transform 动画走 GPU 合成 */
.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    width: 200%;
    z-index: 0;
    background: linear-gradient(
        90deg,
        rgba(110, 195, 255, 0.55) 0%,
        rgba(0, 110, 255, 0.6) 25%,
        rgba(110, 195, 255, 0.55) 50%,
        rgba(0, 110, 255, 0.6) 75%,
        rgba(110, 195, 255, 0.55) 100%
    );
    transform: translateX(-50%);
    animation: liquidFlow 3.2s linear infinite;
    will-change: transform;
    pointer-events: none;
}
@keyframes liquidFlow {
    from { transform: translateX(-50%); }
    to { transform: translateX(0); }
}
/* 液态玻璃高光层（位于渐变与文字之上） */
.btn-primary::after {
    content: '';
    position: absolute;
    inset: 0;
    z-index: 2;
    border-radius: inherit;
    background: linear-gradient(
        to bottom,
        rgba(255, 255, 255, 0.4) 0%,
        rgba(255, 255, 255, 0.08) 40%,
        transparent 60%
    );
    pointer-events: none;
}
.btn-primary .icon,
.btn-primary .btn-label {
    position: relative;
    z-index: 3;
}
.btn-primary .btn-label {
    font-weight: 600;
    letter-spacing: 0.02em;
}
.btn-primary:hover {
    transform: translateY(-2px);
    border-color: rgba(255, 255, 255, 0.6);
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.65),
        inset 0 -1px 0 rgba(0, 40, 120, 0.2),
        0 12px 32px rgba(0, 102, 255, 0.38);
}
.btn-primary:active {
    transform: scale(0.96);
}
.scroll-indicator {
    position: absolute;
    bottom: var(--space-2xl);
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    color: var(--color-text-muted);
    font-size: 0.75rem;
    animation: float 3s ease-in-out infinite;
}
.scroll-indicator::after {
    content: '';
    width: 1px;
    height: 32px;
    background: linear-gradient(to bottom, var(--color-text-muted), transparent);
}
@keyframes float {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(8px); }
}
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
}
.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }
@media (prefers-reduced-motion: reduce) {
    .reveal {
        opacity: 1;
        transform: none;
        transition: none;
    }
    .scroll-indicator { animation: none; }
}
.section {
    padding: 10rem var(--space-xl);
    scroll-margin-top: 64px;
}
.section-alt {
    background: var(--color-bg-white);
}
/* 为玻璃面板提供柔和的折射底纹 */
#data {
    background:
        radial-gradient(closest-side at 15% 30%, rgba(0, 102, 255, 0.05), transparent),
        radial-gradient(closest-side at 85% 70%, rgba(140, 90, 255, 0.05), transparent),
        var(--color-bg);
}
#download {
    background:
        radial-gradient(closest-side at 20% 20%, rgba(0, 102, 255, 0.06), transparent),
        radial-gradient(closest-side at 80% 80%, rgba(0, 180, 255, 0.05), transparent),
        var(--color-bg-white);
}
.container {
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
    padding: 0 var(--space-xl);
}
.section-header {
    text-align: center;
    margin-bottom: var(--space-4xl);
}
.section-label {
    display: inline-block;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-md);
}
.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 600;
    color: var(--color-primary);
    line-height: 1.3;
    letter-spacing: -0.02em;
}
.section-desc {
    font-size: 1.0625rem;
    color: var(--color-text-secondary);
    max-width: 500px;
    margin: var(--space-md) auto 0;
    line-height: 1.8;
}
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-xl);
    text-align: center;
}
.stat-item {
    padding: var(--space-2xl);
    background: var(--glass-bg-subtle);
    background-image: linear-gradient(to bottom, rgba(255, 255, 255, 0.3), rgba(255, 255, 255, 0) 45%);
    -webkit-backdrop-filter: var(--glass-blur-sm);
    backdrop-filter: var(--glass-blur-sm);
    border: 1px solid var(--glass-border-visible);
    border-radius: var(--radius-xl);
    box-shadow: var(--glass-highlight), var(--glass-shadow-sm);
    transition: var(--transition-base);
}
.stat-item:hover {
    background: var(--glass-bg);
    transform: translateY(-3px);
    box-shadow: var(--glass-highlight), var(--glass-shadow-sm);
}
.stat-number {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1.2;
    font-variant-numeric: tabular-nums;
}
.stat-label {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-top: var(--space-sm);
}
.features-showcase {
    display: flex;
    flex-direction: column;
    gap: var(--space-4xl);
}
.feature-item {
    display: flex;
    align-items: center;
    gap: var(--space-4xl);
}
.feature-item-reverse {
    flex-direction: row-reverse;
}
.feature-image {
    flex: 1;
    max-width: 400px;
}
.feature-image img {
    width: 100%;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
}
.tablet-frame {
    background: #1a1a1a;
    border-radius: 14px;
    padding: 10px;
    box-shadow: 0 8px 30px rgba(0,0,0,0.25);
    position: relative;
    overflow: hidden;
}
.tablet-frame::before {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 50%;
    transform: translateX(-50%);
    width: 6px;
    height: 6px;
    background: #333;
    border-radius: 50%;
}
.frame-container {
    background: #000;
    border-radius: 6px;
    overflow: hidden;
}
.frame-container img {
    display: block;
    width: 100%;
    height: auto;
    border-radius: 0;
    box-shadow: none;
}
.dual-frame {
    display: flex;
    gap: 12px;
    align-items: flex-end;
}
.phone-frame {
    flex: 0 0 35%;
    background: #1a1a1a;
    border-radius: 18px;
    padding: 8px;
    box-shadow: 0 8px 30px rgba(0,0,0,0.25);
    position: relative;
}
.phone-frame::before {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 50%;
    transform: translateX(-50%);
    width: 24px;
    height: 3px;
    background: #333;
    border-radius: 2px;
}
.phone-frame .frame-container {
    border-radius: 10px;
}
.tablet-frame-small {
    flex: 1;
    background: #1a1a1a;
    border-radius: 12px;
    padding: 8px;
    box-shadow: 0 8px 30px rgba(0,0,0,0.25);
    position: relative;
}
.tablet-frame-small::before {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 50%;
    transform: translateX(-50%);
    width: 5px;
    height: 5px;
    background: #333;
    border-radius: 50%;
}
.monitor-with-tablet {
    display: flex;
    gap: 12px;
    align-items: flex-end;
}
.monitor-part {
    flex: 1;
    background: #1a1a1a;
    border-radius: 8px;
    padding: 10px;
    box-shadow: 0 8px 30px rgba(0,0,0,0.25);
    position: relative;
}
.monitor-part::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 20px;
    background: #333;
    border-radius: 0 0 4px 4px;
}
.monitor-part .frame-container {
    border-radius: 4px;
}
.tablet-part {
    flex: 0 0 40%;
    background: #1a1a1a;
    border-radius: 12px;
    padding: 8px;
    box-shadow: 0 8px 30px rgba(0,0,0,0.25);
    position: relative;
}
.tablet-part::before {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 50%;
    transform: translateX(-50%);
    width: 5px;
    height: 5px;
    background: #333;
    border-radius: 50%;
}
.tablet-part .frame-container {
    border-radius: 6px;
}
.tablet-click-area {
    position: relative;
    cursor: pointer;
    overflow: hidden;
}
.click-cursor {
    position: absolute;
    width: 36px;
    height: 36px;
    pointer-events: none;
    opacity: 0;
    -webkit-transform: translate(-50%, -50%);
    -ms-transform: translate(-50%, -50%);
    transform: translate(-50%, -50%);
    z-index: 10;
    font-size: 32px;
    line-height: 1;
    /* 使用系统默认表情，兼容QQ/微信 */
    font-family: "Apple Color Emoji", "Segoe UI Emoji", "Segoe Symbol", "Noto Color Emoji", sans-serif;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
}
.click-ripple {
    position: absolute;
    width: 40px;
    height: 40px;
    background: -webkit-radial-gradient(circle, rgba(255, 255, 255, 0.6) 0%, transparent 70%);
    background: radial-gradient(circle, rgba(255, 255, 255, 0.6) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
    opacity: 0;
    -webkit-transform: translate(-50%, -50%) scale(0);
    -ms-transform: translate(-50%, -50%) scale(0);
    transform: translate(-50%, -50%) scale(0);
    z-index: 9;
}
@-webkit-keyframes cursorClick {
    0% {
        opacity: 1;
        -webkit-transform: translate(-50%, -50%) scale(1);
        transform: translate(-50%, -50%) scale(1);
    }
    50% {
        opacity: 1;
        -webkit-transform: translate(-50%, -50%) scale(1.2);
        transform: translate(-50%, -50%) scale(1.2);
    }
    100% {
        opacity: 0;
        -webkit-transform: translate(-50%, -50%) scale(1);
        transform: translate(-50%, -50%) scale(1);
    }
}
@keyframes cursorClick {
    0% {
        opacity: 1;
        -webkit-transform: translate(-50%, -50%) scale(1);
        transform: translate(-50%, -50%) scale(1);
    }
    50% {
        opacity: 1;
        -webkit-transform: translate(-50%, -50%) scale(1.2);
        transform: translate(-50%, -50%) scale(1.2);
    }
    100% {
        opacity: 0;
        -webkit-transform: translate(-50%, -50%) scale(1);
        transform: translate(-50%, -50%) scale(1);
    }
}
@-webkit-keyframes rippleExpand {
    0% {
        opacity: 0.6;
        -webkit-transform: translate(-50%, -50%) scale(0);
        transform: translate(-50%, -50%) scale(0);
    }
    100% {
        opacity: 0;
        -webkit-transform: translate(-50%, -50%) scale(2.5);
        transform: translate(-50%, -50%) scale(2.5);
    }
}
@keyframes rippleExpand {
    0% {
        opacity: 0.6;
        -webkit-transform: translate(-50%, -50%) scale(0);
        transform: translate(-50%, -50%) scale(0);
    }
    100% {
        opacity: 0;
        -webkit-transform: translate(-50%, -50%) scale(2.5);
        transform: translate(-50%, -50%) scale(2.5);
    }
}
.click-cursor.animate {
    -webkit-animation: cursorClick 0.6s ease-out forwards;
    animation: cursorClick 0.6s ease-out forwards;
}
.click-ripple.animate {
    -webkit-animation: rippleExpand 0.8s ease-out forwards;
    animation: rippleExpand 0.8s ease-out forwards;
}
.feature-content {
    flex: 1;
}
.feature-content h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--space-md);
}
.feature-content p {
    color: var(--color-text-secondary);
    line-height: 1.8;
    font-size: 1rem;
}
.docs-highlight {
    background: var(--glass-bg);
    background-image: linear-gradient(to bottom, rgba(255, 255, 255, 0.25), rgba(255, 255, 255, 0) 40%);
    -webkit-backdrop-filter: var(--glass-blur);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border-visible);
    border-radius: var(--radius-2xl);
    padding: var(--space-3xl);
    max-width: 900px;
    margin: 0 auto;
    box-shadow: var(--glass-highlight), var(--glass-shadow);
}
.docs-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
}
.docs-header h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--space-sm);
}
.docs-header p {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
}
.docs-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
}
.doc-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-xl);
    background: var(--glass-bg-subtle);
    background-image: linear-gradient(to bottom, rgba(255, 255, 255, 0.3), rgba(255, 255, 255, 0) 45%);
    -webkit-backdrop-filter: var(--glass-blur-sm);
    backdrop-filter: var(--glass-blur-sm);
    border-radius: var(--radius-xl);
    border: 1px solid var(--glass-border-visible);
    box-shadow: var(--glass-highlight), var(--glass-shadow-sm);
    transition: var(--transition-base);
}
.doc-item:hover {
    transform: translateY(-4px);
    background: var(--glass-bg);
    box-shadow: var(--glass-highlight), 0 8px 24px rgba(0, 102, 255, 0.12);
    border-color: var(--glass-border-accent);
}
.doc-item:active {
    transform: scale(0.97);
}
.doc-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--glass-bg-strong);
    -webkit-backdrop-filter: var(--glass-blur-sm);
    backdrop-filter: var(--glass-blur-sm);
    border: 1px solid var(--glass-border-soft);
    border-radius: var(--radius-lg);
    color: var(--color-accent);
    box-shadow: var(--glass-highlight-soft), var(--glass-shadow-sm);
}
.doc-icon .icon {
    width: 28px;
    height: 28px;
}
.doc-name {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--color-primary);
    text-align: center;
}
.doc-size {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}
.doc-section {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}
.doc-section-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-primary);
    text-align: center;
    margin: 0;
    line-height: 1.4;
}
.doc-section-items {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}
.doc-section-free .doc-section-items {
    grid-template-columns: repeat(3, 1fr);
}
.doc-section-free .doc-item {
    grid-column: 2;
}
.doc-divider {
    width: 100%;
    height: 1px;
    background: linear-gradient(to right, transparent, var(--color-border) 20%, var(--color-border) 80%, transparent);
    justify-self: stretch;
}
.doc-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.6875rem;
    font-weight: 600;
    padding: 3px 10px;
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    line-height: 1;
}
.doc-badge-free {
    background: #e8f5e9;
    color: #2e7d32;
}
.doc-badge-pro {
    background: #fff3e0;
    color: #ef6c00;
}
.aifadian-link {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-top: var(--space-lg);
    padding: var(--space-md) var(--space-lg);
    background: var(--glass-bg-subtle);
    background-image: linear-gradient(to bottom, rgba(255, 255, 255, 0.3), rgba(255, 255, 255, 0) 45%);
    -webkit-backdrop-filter: var(--glass-blur-sm);
    backdrop-filter: var(--glass-blur-sm);
    border: 1px solid var(--glass-border-visible);
    border-radius: var(--radius-xl);
    box-shadow: var(--glass-highlight), var(--glass-shadow-sm);
    color: var(--color-text);
    font-size: 0.9375rem;
    font-weight: 500;
    transition: var(--transition-base);
}
.aifadian-link:hover {
    transform: translateY(-2px);
    background: var(--glass-bg);
    box-shadow: var(--glass-highlight), 0 8px 24px rgba(0, 102, 255, 0.12);
    border-color: var(--glass-border-accent);
    color: var(--color-accent);
}
.aifadian-link:active {
    transform: scale(0.98);
}
.aifadian-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    object-fit: contain;
}
.author-message {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}
.author-quote {
    margin-bottom: var(--space-2xl);
    color: var(--color-accent);
}
.author-text {
    color: var(--color-text-secondary);
    line-height: 2;
    margin-bottom: var(--space-lg);
    font-size: 1.0625rem;
}
.author-signature {
    margin-top: var(--space-2xl);
    padding-top: var(--space-xl);
    border-top: 1px solid var(--color-border);
}
.author-name {
    font-weight: 600;
    color: var(--color-primary);
    font-size: 1rem;
}
.footer {
    background: var(--color-bg-alt);
    color: var(--color-text);
    padding: var(--space-4xl) var(--space-xl) var(--space-2xl);
}
.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    gap: var(--space-4xl);
    margin-bottom: var(--space-2xl);
}
.footer-left {
    flex: 1;
    max-width: 400px;
}
.footer-right {
    display: flex;
    gap: var(--space-4xl);
}
.footer-brand {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
    font-weight: 600;
    font-size: 1.0625rem;
    color: var(--color-primary);
}
.footer-brand img {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-md);
}
.footer-desc {
    font-size: 0.9375rem;
    line-height: 1.8;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-lg);
}
.footer-title {
    font-size: 0.8125rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-text-muted);
    margin-bottom: var(--space-lg);
}
.footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}
.footer-links li {
    margin-bottom: var(--space-sm);
}
.footer-links li:last-child {
    margin-bottom: 0;
}
.footer-links a {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    transition: var(--transition-fast);
}
.footer-links a:hover {
    color: var(--color-primary);
}
.footer-links .icon {
    width: 16px;
    height: 16px;
    opacity: 0.7;
}
.footer-bottom {
    max-width: 1200px;
    margin: 0 auto;
    padding-top: var(--space-xl);
    border-top: 1px solid var(--color-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-md);
}
.footer-copyright {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
}
.footer-legal {
    display: flex;
    gap: var(--space-lg);
}
.footer-legal a {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    transition: var(--transition-fast);
}
.footer-legal a:hover {
    color: var(--color-primary);
}
.beian-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    color: var(--color-text-muted);
}
.beian-link:hover {
    color: var(--color-primary);
}
.beian-icon {
    width: 16px;
    height: 16px;
    vertical-align: middle;
}
.beian-link span {
    vertical-align: middle;
}
.back-to-top {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 48px;
    height: 48px;
    background: var(--glass-bg-subtle);
    -webkit-backdrop-filter: var(--glass-blur-sm);
    backdrop-filter: var(--glass-blur-sm);
    color: var(--color-primary);
    border: 1px solid rgba(0, 0, 0, 0.12);
    border-radius: var(--radius-full);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition-base);
    z-index: 1000;
    box-shadow: var(--glass-highlight-soft), var(--glass-shadow-sm);
}
.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.back-to-top:hover {
    background: var(--glass-bg);
    border-color: rgba(0, 0, 0, 0.18);
    transform: translateY(-4px);
}
.back-to-top:active {
    transform: scale(0.92);
}
.back-to-top .icon {
    width: 20px;
    height: 20px;
}
@media (max-width: 1024px) {
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .doc-section-items {
        grid-template-columns: repeat(3, 1fr);
    }
    .footer-content { 
        flex-wrap: wrap;
        gap: var(--space-2xl);
    }
    .footer-left {
        width: 100%;
        max-width: 100%;
    }
    .footer-right {
        width: 100%;
        justify-content: space-between;
    }
}
@media (max-width: 768px) {
    .container {
        padding: 0 var(--space-md);
    }
    .menu-toggle { display: flex; }
    .nav-links {
        position: fixed;
        top: 72px;
        right: 12px;
        width: 210px;
        max-height: calc(100vh - 96px);
        flex-direction: column;
        align-items: flex-start;
        background: var(--glass-bg-strong);
        -webkit-backdrop-filter: var(--glass-blur);
        backdrop-filter: var(--glass-blur);
        border: 1px solid var(--glass-border-soft);
        border-radius: var(--radius-xl);
        box-shadow: var(--glass-highlight), var(--glass-shadow);
        gap: var(--space-xs);
        transition: var(--transition-slow);
        padding: var(--space-md);
        z-index: 999;
        transform: translateX(120%);
    }
    .nav-links.active {
        transform: translateX(0);
    }
    .nav-links a {
        font-size: 1rem;
        font-weight: 500;
        padding: var(--space-sm) var(--space-md);
        width: 100%;
        border-radius: var(--radius-full);
    }
    .hero { 
        min-height: 100svh; 
    }
    .hero-title { font-size: 2.5rem; }
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    .btn { width: 100%; max-width: 280px; }
    .section { 
        padding: 6rem var(--space-lg); 
    }
    .stats-grid { 
        grid-template-columns: repeat(2, 1fr); 
        gap: var(--space-md); 
    }
    .docs-grid { grid-template-columns: 1fr; }
    .doc-section-items { grid-template-columns: 1fr; }
    .doc-section-free .doc-section-items { grid-template-columns: 1fr; }
    .doc-section-free .doc-item { grid-column: auto; }
    .docs-highlight { padding: var(--space-xl); }
    .footer { 
        padding: var(--space-2xl) var(--space-md); 
    }
    .footer-content { 
        flex-direction: column;
        gap: var(--space-2xl);
    }
    .footer-left {
        max-width: 100%;
    }
    .footer-right {
        flex-direction: row;
        gap: var(--space-xl);
        justify-content: space-between;
        width: 100%;
    }
    .footer-bottom { 
        flex-direction: column; 
        text-align: center; 
    }
    .footer-legal { 
        flex-direction: column; 
        align-items: center; 
        gap: var(--space-sm); 
    }
    .beian-link { 
        justify-content: center; 
    }
    .back-to-top {
        right: 16px;
        bottom: 16px;
    }
    .feature-item,
    .feature-item-reverse {
        flex-direction: column;
        gap: var(--space-2xl);
    }
    .feature-image {
        max-width: 100%;
        width: 100%;
    }
    .feature-content {
        width: 100%;
    }
    .dual-frame {
        flex-direction: column;
        gap: 12px;
    }
    .phone-frame {
        flex: none;
        max-width: 200px;
        margin: 0 auto;
    }
    .tablet-frame-small {
        width: 100%;
    }
    .monitor-with-tablet {
        flex-direction: column;
        gap: 12px;
    }
    .monitor-part {
        width: 100%;
    }
    .tablet-part {
        flex: none;
        width: 100%;
        max-width: 300px;
        margin: 0 auto;
    }
}
@media (max-width: 480px) {
    .nav-container { padding: 0 var(--space-md); }
    .hero-title { font-size: 2rem; }
    .section-title { font-size: 1.75rem; }
    .docs-highlight { padding: var(--space-lg); }
    .section { 
        padding: 4rem var(--space-md); 
    }
    .container {
        padding: 0 var(--space-md);
    }
    .stats-grid { 
        grid-template-columns: repeat(2, 1fr); 
        gap: var(--space-sm); 
    }
    .stat-item { 
        padding: var(--space-md); 
    }
    .stat-number { 
        font-size: 2rem; 
    }
    .footer-right {
        flex-direction: row;
        gap: var(--space-lg);
        justify-content: space-between;
        width: 100%;
    }
    .footer-right div {
        flex: 1;
    }
}
.video-wrapper {
    max-width: 800px;
    margin: 0 auto;
}
.video-frame {
    background: #1a1a1a;
    border-radius: 14px;
    padding: 10px;
    box-shadow: 0 8px 30px rgba(0,0,0,0.25);
    position: relative;
    overflow: hidden;
}
.video-frame::before {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 50%;
    transform: translateX(-50%);
    width: 6px;
    height: 6px;
    background: #333;
    border-radius: 50%;
}
.video-frame .frame-container {
    position: relative;
    width: 100%;
    height: 0;
    padding-bottom: 56.25%; /* 16:9 宽高比 */
    overflow: hidden;
    border-radius: 6px;
}
.video-frame .frame-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}
@media print {
    .navbar, .footer, .scroll-indicator, .back-to-top { display: none !important; }
    .hero { min-height: auto; padding: 2rem; background: white; }
    body { color: #000; background: white; }
}
/* ===== 性能优化 ===== */
/* 移动端：降低模糊半径（backdrop-filter 模糊是主要 GPU 开销，半径减半成本大幅下降） */
@media (max-width: 768px) {
    :root {
        --glass-blur: blur(10px) saturate(170%);
        --glass-blur-sm: blur(7px) saturate(150%);
    }
    /* 移动端去掉静态元素上的大范围模糊，仅保留导航栏与按钮的玻璃模糊 */
    .docs-highlight,
    .doc-item,
    .doc-icon,
    .aifadian-link,
    .stat-item {
        -webkit-backdrop-filter: none;
        backdrop-filter: none;
        background: rgba(255, 255, 255, 0.72);
        background-image: linear-gradient(to bottom, rgba(255, 255, 255, 0.3), rgba(255, 255, 255, 0) 40%);
    }
    .doc-item {
        background: rgba(255, 255, 255, 0.6);
    }
    .doc-item:hover {
        background: rgba(255, 255, 255, 0.72);
    }
    .aifadian-link {
        background: rgba(255, 255, 255, 0.6);
    }
    .aifadian-link:hover {
        background: rgba(255, 255, 255, 0.72);
    }
    .stat-item {
        background: rgba(255, 255, 255, 0.6);
    }
    .stat-item:hover {
        background: rgba(255, 255, 255, 0.72);
    }
    /* 装饰性环境光晕在移动端移除，减少大面积渐变重绘 */
    .hero::before { display: none; }
    #data, #download { background: var(--color-bg-white); }
    #data { background: var(--color-bg); }
}
/* 触控设备禁用 hover 抬升，避免点按后残留 hover 态 */
@media (hover: none) {
    .doc-item:hover,
    .aifadian-link:hover,
    .stat-item:hover,
    .btn-primary:hover {
        transform: none;
    }
}
/* 尊重系统减弱动态偏好：关闭按钮流动动画与高光 */
@media (prefers-reduced-motion: reduce) {
    .btn-primary::before {
        animation: none;
        transform: none;
        background: linear-gradient(90deg, rgba(110, 195, 255, 0.55), rgba(0, 110, 255, 0.6));
        width: 100%;
    }
}
/* 降级方案：不支持 backdrop-filter 的浏览器使用近实色背景保证可读性 */
@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
    .navbar, .navbar.scrolled { background: rgba(255, 255, 255, 0.95); }
    .nav-links a:hover { background: rgba(0, 0, 0, 0.06); }
    .nav-links a.active { background: rgba(0, 0, 0, 0.08); }
    .menu-toggle, .doc-icon, .back-to-top { background: rgba(255, 255, 255, 0.95); }
    .docs-highlight { background: var(--color-bg-white); }
    .doc-item, .aifadian-link, .stat-item { background: var(--color-bg); }
    .btn-primary { background: #0066ff; }
    @media (max-width: 768px) {
        .nav-links { background: rgba(255, 255, 255, 0.97); }
    }
}