/* ============================================
   全局样式与变量
   ============================================ */
:root {
    --bg-primary: #000000;
    --bg-secondary: #1A1A1E;
    --bg-card: rgba(30, 30, 35, 0.7);
    --neon-cyan: #5DD9FF;
    --neon-blue: #4A9EFF;
    --neon-green: #4AFF88;
    --accent-green: #00FF88;
    --text-primary: #FFFFFF;
    --text-secondary: rgba(255, 255, 255, 0.75);
    --text-muted: rgba(255, 255, 255, 0.5);
    --border-neon: rgba(93, 217, 255, 0.35);
    --shadow-neon: 0 0 20px rgba(93, 217, 255, 0.4);
    --shadow-neon-strong: 0 0 40px rgba(74, 158, 255, 0.6);
    --glow-blue: rgba(74, 158, 255, 0.25);
    --glow-cyan: rgba(93, 217, 255, 0.25);
    --glow-green: rgba(74, 255, 136, 0.25);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    min-width: 1024px;
}

/* ============================================
   导航栏
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(15, 15, 23, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-neon);
    padding: 1rem 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    position: relative;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--neon-cyan);
    text-shadow: 0 0 10px rgba(93, 217, 255, 0.6);
}

.logo-icon {
    width: 48px;
    height: 48px;
    object-fit: contain;
    filter: drop-shadow(0 0 10px rgba(93, 217, 255, 0.6));
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.logo-icon:hover {
    filter: drop-shadow(0 0 20px rgba(74, 158, 255, 0.9));
    transform: scale(1.08);
}

.logo-glow {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, var(--neon-cyan), var(--neon-blue));
    filter: blur(12px);
    opacity: 0.4;
    z-index: -1;
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    padding-bottom: 2px;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--neon-cyan), var(--neon-blue));
    transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 0 8px var(--glow-cyan);
}

.nav-links a:hover {
    color: var(--neon-cyan);
    text-shadow: 0 0 12px var(--glow-cyan);
}

.nav-links a:hover::after {
    width: 100%;
}

.nav-download-btn {
    display: none; /* 暂时隐藏，APP未上架 */
    padding: 0.5rem 1.5rem;
    background: linear-gradient(135deg, var(--neon-cyan), var(--neon-blue));
    border-radius: 25px;
    color: #000000;
    font-weight: 600;
    box-shadow: 0 0 15px var(--glow-blue);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-download-btn:hover {
    background: linear-gradient(135deg, var(--neon-blue), var(--accent-green));
    box-shadow: 0 0 25px var(--glow-cyan), 0 0 40px var(--glow-blue);
    transform: translateY(-2px);
    text-shadow: none;
}

.nav-download-btn:hover::after {
    width: 0;
}

/* ============================================
   Hero 区域
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
    overflow: hidden;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.25;
    animation: float 20s infinite ease-in-out;
}

.orb-1 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, var(--neon-cyan), var(--neon-blue));
    top: -250px;
    left: -250px;
    animation-delay: 0s;
}

.orb-2 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, var(--neon-blue), var(--accent-green));
    top: 50%;
    right: -150px;
    animation-delay: 5s;
}

.orb-3 {
    width: 250px;
    height: 250px;
    background: linear-gradient(135deg, var(--neon-green), var(--neon-cyan));
    bottom: -125px;
    left: 30%;
    animation-delay: 10s;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    33% {
        transform: translate(30px, -30px) scale(1.1);
    }
    66% {
        transform: translate(-20px, 20px) scale(0.9);
    }
}

.hero-container {
    position: relative;
    z-index: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    width: 100%;
}

.hero-content {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 3rem;
    align-items: center;
}

.hero-left {
    position: relative;
    z-index: 1;
    transform: translateY(-15px); /* 整体向上移动15像素 */
}

.hero-right {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
}

.app-preview-container {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: -2rem;
    perspective: 2000px;
    min-height: 600px;
    width: 100%;
    padding: 2rem 0;
    margin-left: -1rem;
}

.app-preview {
    position: relative;
    perspective: 1000px;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    flex-shrink: 0;
}

/* 第一张图（左图）：低一点，逆时针转15度，无3D倾斜 */
.preview-1 {
    transform: translateY(-15px) translateX(-10px) rotateZ(-5deg) scale(0.85); /* 缩小到和右侧一致: 0.9 -> 0.85 */
    z-index: 3;
}

/* 第二张图（右图）：高一点，形成错落感，适当缩小，无3D倾斜 */
.preview-2 {
    transform: translateY(-30px) translateX(20px) rotateZ(2deg) scale(0.85); /* 下移10px: -40px -> -30px */
    z-index: 1;
}

.app-preview:hover {
    transform: translateY(0) translateX(0) rotateZ(0) scale(1.05);
    z-index: 10;
}

.preview-label {
    position: absolute;
    bottom: -40px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.9rem;
    color: var(--neon-cyan);
    font-weight: 600;
    text-align: center;
    white-space: nowrap;
    text-shadow: 0 0 10px rgba(0, 255, 209, 0.5);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.app-preview:hover .preview-label {
    opacity: 1;
}

.phone-frame {
    position: relative;
    width: 100%;
    max-width: 340px;
    min-width: 300px;
    margin: 0 auto;
    aspect-ratio: 9/19;
    background: transparent; /* 去掉背景渐变 */
    border-radius: 30px;
    padding: 0; /* 去掉内边距，让图片直接显示 */
    border: none; /* 去掉边框 */
    box-shadow: none; /* 去掉阴影 */
    transition: transform 0.3s ease;
}

.app-preview:hover .phone-frame {
    transform: scale(1.05);
}

.phone-glow {
    position: absolute;
    top: -20px;
    left: -20px;
    right: -20px;
    bottom: -20px;
    background: linear-gradient(135deg, var(--neon-cyan), var(--neon-blue));
    border-radius: 40px;
    filter: blur(30px);
    opacity: 0.3;
    z-index: -1;
    animation: pulse 3s infinite ease-in-out;
}

@keyframes pulse {
    0%, 100% {
        opacity: 0.3;
        transform: scale(1);
    }
    50% {
        opacity: 0.5;
        transform: scale(1.05);
    }
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: transparent; /* 保持透明，让下方图片显示 */
    border-radius: 25px;
    overflow: hidden;
    position: relative;
    perspective: 1000px; /* 启用3D透视，用于条带翻转 */
    transform-style: preserve-3d;
}

.app-screenshot {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 1; /* 图片始终显示 */
    overflow: hidden;
}

/* 百叶窗容器 */
.blinds-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    z-index: 10;
    pointer-events: none;
}

.blinds-container.vertical {
    flex-direction: row;
}

/* 百叶窗条带 - 显示图片切片，翻转时露出下方图片 */
.blind-stripe {
    flex: 1;
    /* 背景图片将在各个screenshot类中单独设置 */
    transform-origin: top;
    transform: rotateX(0deg);
    opacity: 1;
    pointer-events: none; /* 不阻挡交互 */
    backface-visibility: hidden; /* 优化3D翻转性能 */
    transform-style: preserve-3d; /* 保持3D变换 */
    position: relative;
    overflow: hidden;
}

.blinds-container.vertical .blind-stripe {
    transform-origin: left;
    transform: rotateY(0deg);
}

/* 第一个手机：条带多栅格顺序翻转 */
.screenshot-1 .blind-stripe {
    animation: blind-flip-up-cycle-1 16.6s infinite ease-in-out;
    animation-delay: calc(0s + var(--index) * 0.04s);
    animation-fill-mode: both;
}

.screenshot-2 .blind-stripe {
    animation: blind-flip-up-cycle-2 16.6s infinite ease-in-out;
    animation-delay: calc(0s + var(--index) * 0.04s);
    animation-fill-mode: both;
}

.screenshot-3 .blind-stripe {
    display: none; /* 第三张不显示条带，一直显示图片 */
}

/* 第一张图片的条带：多栅格顺序翻转向上卷走 */
@keyframes blind-flip-up-cycle-1 {
    /* 显示阶段：0-30.12% (0-5s) - 停顿5秒，条带遮挡图片 */
    0%, 30.12% {
        transform: rotateX(0deg);
        opacity: 1; /* 条带显示，遮挡第一张图 */
    }
    /* 翻转阶段：30.12-34.94% (5-5.8s) - 0.8秒，条带向上翻转，露出第二张图 */
    30.12% {
        transform: rotateX(0deg);
        opacity: 1;
    }
    34.94% {
        transform: rotateX(90deg);
        opacity: 0; /* 条带翻转完成，隐藏，露出第二张图 */
    }
    /* 隐藏阶段：34.94-100% (5.8-16.6s) - 保持隐藏 */
    34.94%, 100% {
        transform: rotateX(90deg);
        opacity: 0;
    }
}

/* 第二张图片的条带：多栅格顺序翻转向上卷走 */
@keyframes blind-flip-up-cycle-2 {
    /* 隐藏阶段：0-34.94% (0-5.8s) - 被第一张图的条带遮挡 */
    0%, 34.94% {
        transform: rotateX(0deg);
        opacity: 0; /* 条带隐藏，第二张图显示 */
    }
    /* 显示阶段：34.94-65.06% (5.8-10.8s) - 停顿5秒，条带隐藏 */
    34.94%, 65.06% {
        transform: rotateX(0deg);
        opacity: 0; /* 条带隐藏，第二张图完全显示 */
    }
    /* 翻转阶段：65.06-69.88% (10.8-11.6s) - 0.8秒，条带向上翻转，露出第三张图 */
    65.06% {
        transform: rotateX(0deg);
        opacity: 1; /* 条带显示，开始翻转 */
    }
    69.88% {
        transform: rotateX(90deg);
        opacity: 0; /* 条带翻转完成，隐藏，露出第三张图 */
    }
    /* 隐藏阶段：69.88-100% (11.6-16.6s) - 保持隐藏 */
    69.88%, 100% {
        transform: rotateX(90deg);
        opacity: 0;
    }
}

/* 旧的clip-path动画已删除，使用条带翻转动画 */

/* 第二个手机：条带多栅格顺序翻转 */
.screenshot-dashboard-1 .blind-stripe {
    animation: blind-flip-left-cycle-1 16.6s infinite ease-in-out;
    animation-delay: calc(0s + var(--index) * 0.04s);
    animation-fill-mode: both;
}

.screenshot-dashboard-2 .blind-stripe {
    animation: blind-flip-left-cycle-2 16.6s infinite ease-in-out;
    animation-delay: calc(0s + var(--index) * 0.04s);
    animation-fill-mode: both;
}

.screenshot-dashboard-3 .blind-stripe {
    display: none; /* 第三张不显示条带，一直显示图片 */
}

@keyframes blind-flip-left {
    0% {
        transform: rotateY(0deg);
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        transform: rotateY(90deg);
        opacity: 0;
    }
}

/* 第一张图片的条带：多栅格顺序翻转向左卷走 */
@keyframes blind-flip-left-cycle-1 {
    /* 显示阶段：0-30.12% (0-5s) - 停顿5秒，条带遮挡图片 */
    0%, 30.12% {
        transform: rotateY(0deg);
        opacity: 1; /* 条带显示，遮挡第一张图 */
    }
    /* 翻转阶段：30.12-34.94% (5-5.8s) - 0.8秒，条带向左翻转，露出第二张图 */
    30.12% {
        transform: rotateY(0deg);
        opacity: 1;
    }
    34.94% {
        transform: rotateY(90deg);
        opacity: 0; /* 条带翻转完成，隐藏，露出第二张图 */
    }
    /* 隐藏阶段：34.94-100% (5.8-16.6s) - 保持隐藏 */
    34.94%, 100% {
        transform: rotateY(90deg);
        opacity: 0;
    }
}

/* 第二张图片的条带：多栅格顺序翻转向左卷走 */
@keyframes blind-flip-left-cycle-2 {
    /* 隐藏阶段：0-34.94% (0-5.8s) - 被第一张图的条带遮挡 */
    0%, 34.94% {
        transform: rotateY(0deg);
        opacity: 0; /* 条带隐藏，第二张图显示 */
    }
    /* 显示阶段：34.94-65.06% (5.8-10.8s) - 停顿5秒，条带隐藏 */
    34.94%, 65.06% {
        transform: rotateY(0deg);
        opacity: 0; /* 条带隐藏，第二张图完全显示 */
    }
    /* 翻转阶段：65.06-69.88% (10.8-11.6s) - 0.8秒，条带向左翻转，露出第三张图 */
    65.06% {
        transform: rotateY(0deg);
        opacity: 1; /* 条带显示，开始翻转 */
    }
    69.88% {
        transform: rotateY(90deg);
        opacity: 0; /* 条带翻转完成，隐藏，露出第三张图 */
    }
    /* 隐藏阶段：69.88-100% (11.6-16.6s) - 保持隐藏 */
    69.88%, 100% {
        transform: rotateY(90deg);
        opacity: 0;
    }
}

/* 第一个手机（AI食物识别）：多栅格水平百叶窗效果 */
.screenshot-1 {
    z-index: 3;
}

.screenshot-2 {
    z-index: 2;
}

.screenshot-3 {
    z-index: 1;
}

/* 第一张图：多栅格顺序翻转向上卷走 */
@keyframes horizontal-blinds-stripes-1 {
    0% {
        mask-image: repeating-linear-gradient(
            to bottom,
            transparent 0%,
            transparent calc(100% / var(--stripes) - 2px),
            black calc(100% / var(--stripes) - 2px),
            black calc(100% / var(--stripes))
        );
        mask-size: 100% 100%;
    }
    30% {
        mask-image: repeating-linear-gradient(
            to bottom,
            transparent 0%,
            transparent calc(100% / var(--stripes) - 2px),
            black calc(100% / var(--stripes) - 2px),
            black calc(100% / var(--stripes))
        );
    }
    33.33% {
        mask-image: repeating-linear-gradient(
            to bottom,
            transparent 0%,
            transparent calc(100% / var(--stripes) - 2px),
            black calc(100% / var(--stripes) - 2px),
            black calc(100% / var(--stripes))
        );
        transform: translateY(-100%);
    }
    100% {
        mask-image: repeating-linear-gradient(
            to bottom,
            transparent 0%,
            transparent calc(100% / var(--stripes) - 2px),
            black calc(100% / var(--stripes) - 2px),
            black calc(100% / var(--stripes))
        );
        transform: translateY(-100%);
    }
}

/* 使用 clip-path 实现多栅格百叶窗效果 */
@keyframes horizontal-blinds-stripes-1 {
    0% {
        clip-path: polygon(
            0% 0%, 100% 0%,
            100% calc(100% / 12 * 1), 0% calc(100% / 12 * 1),
            0% calc(100% / 12 * 2), 100% calc(100% / 12 * 2),
            100% calc(100% / 12 * 3), 0% calc(100% / 12 * 3),
            0% calc(100% / 12 * 4), 100% calc(100% / 12 * 4),
            100% calc(100% / 12 * 5), 0% calc(100% / 12 * 5),
            0% calc(100% / 12 * 6), 100% calc(100% / 12 * 6),
            100% calc(100% / 12 * 7), 0% calc(100% / 12 * 7),
            0% calc(100% / 12 * 8), 100% calc(100% / 12 * 8),
            100% calc(100% / 12 * 9), 0% calc(100% / 12 * 9),
            0% calc(100% / 12 * 10), 100% calc(100% / 12 * 10),
            100% calc(100% / 12 * 11), 0% calc(100% / 12 * 11),
            0% 100%, 100% 100%
        );
    }
    30% {
        clip-path: polygon(
            0% 0%, 100% 0%,
            100% calc(100% / 12 * 1), 0% calc(100% / 12 * 1),
            0% calc(100% / 12 * 2), 100% calc(100% / 12 * 2),
            100% calc(100% / 12 * 3), 0% calc(100% / 12 * 3),
            0% calc(100% / 12 * 4), 100% calc(100% / 12 * 4),
            100% calc(100% / 12 * 5), 0% calc(100% / 12 * 5),
            0% calc(100% / 12 * 6), 100% calc(100% / 12 * 6),
            100% calc(100% / 12 * 7), 0% calc(100% / 12 * 7),
            0% calc(100% / 12 * 8), 100% calc(100% / 12 * 8),
            100% calc(100% / 12 * 9), 0% calc(100% / 12 * 9),
            0% calc(100% / 12 * 10), 100% calc(100% / 12 * 10),
            100% calc(100% / 12 * 11), 0% calc(100% / 12 * 11),
            0% 100%, 100% 100%
        );
    }
    33.33% {
        clip-path: polygon(
            0% 0%, 100% 0%,
            100% 0%, 0% 0%,
            0% 0%, 100% 0%,
            100% 0%, 0% 0%,
            0% 0%, 100% 0%,
            100% 0%, 0% 0%,
            0% 0%, 100% 0%,
            100% 0%, 0% 0%,
            0% 0%, 100% 0%,
            100% 0%, 0% 0%,
            0% 0%, 100% 0%,
            100% 0%, 0% 0%,
            0% 0%, 100% 0%
        );
    }
    100% {
        clip-path: polygon(
            0% 0%, 100% 0%,
            100% 0%, 0% 0%,
            0% 0%, 100% 0%,
            100% 0%, 0% 0%,
            0% 0%, 100% 0%,
            100% 0%, 0% 0%,
            0% 0%, 100% 0%,
            100% 0%, 0% 0%,
            0% 0%, 100% 0%,
            100% 0%, 0% 0%,
            0% 0%, 100% 0%,
            100% 0%, 0% 0%,
            0% 0%, 100% 0%
        );
    }
}

/* 第二张图：在第一张卷走时自然露出，然后也向上卷走 */
@keyframes horizontal-blinds-stripes-2 {
    0% {
        clip-path: inset(0 0 0% 0);
    }
    30% {
        clip-path: inset(0 0 0% 0);
    }
    33.33% {
        clip-path: inset(0 0 0% 0); /* 第一张开始卷走，第二张开始露出 */
    }
    63.33% {
        clip-path: inset(0 0 0% 0);
    }
    66.66% {
        clip-path: inset(100% 0 0% 0); /* 第二张开始向上卷走 */
    }
    100% {
        clip-path: inset(100% 0 0% 0);
    }
}

/* 第三张图：在第二张卷走时自然露出 */
@keyframes horizontal-blinds-stripes-3 {
    0% {
        clip-path: inset(0 0 0% 0);
    }
    66.66% {
        clip-path: inset(0 0 0% 0);
    }
    70% {
        clip-path: inset(0 0 0% 0);
    }
    100% {
        clip-path: inset(0 0 0% 0);
    }
}

/* 第二个手机（营养仪表盘）：多栅格垂直百叶窗效果 */
.screenshot-dashboard-1 {
    z-index: 3;
}

.screenshot-dashboard-2 {
    z-index: 2;
}

.screenshot-dashboard-3 {
    z-index: 1;
}

.screenshot-placeholder {
    display: none; /* 隐藏占位符，显示真实图片 */
}

.placeholder-icon {
    font-size: 3rem;
    opacity: 0.6;
    filter: drop-shadow(0 0 10px rgba(0, 255, 209, 0.3));
}

.placeholder-text {
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 500;
    opacity: 0.7;
}

/* AI 食物识别界面截图 */
.screenshot-1 {
    background-image: url('https://img.minapplat.com/gw/food-recognition-1.png');
    background-size: 100% 100%; /* 使用固定尺寸，确保与百叶窗条带对齐 */
    background-position: center;
    animation-delay: 0s;
}

.screenshot-2 {
    background-image: url('images/food-recognition-2.png');
    background-size: 100% 100%;
    background-position: center;
    animation-delay: 3s;
}

.screenshot-3 {
    background-image: url('images/food-recognition-3.png');
    background-size: 100% 100%;
    background-position: center;
    animation-delay: 6s;
}

/* 营养仪表盘界面截图 */
.screenshot-dashboard-1 {
    background-image: url('images/nutrition-dashboard-1.png');
    background-size: 100% 100%;
    background-position: center;
    animation-delay: 0s;
}

.screenshot-dashboard-2 {
    background-image: url('images/nutrition-dashboard-2.png');
    background-size: 100% 100%;
    background-position: center;
    animation-delay: 3s;
}

.screenshot-dashboard-3 {
    background-image: url('images/nutrition-dashboard-3.png');
    background-size: 100% 100%;
    background-position: center;
    animation-delay: 6s;
}

/* 让百叶窗条带显示对应图片的切片，实现丝滑翻转效果 */
/* AI 食物识别 - 水平百叶窗条带显示图片切片 */
.screenshot-1 .blind-stripe {
    background-image: url('https://img.minapplat.com/gw/food-recognition-1.png');
    background-size: 100% 1200%; /* 12个条带，高度放大12倍 */
    background-position: 0 calc(var(--index) * -100%);
    background-repeat: no-repeat;
}

.screenshot-2 .blind-stripe {
    background-image: url('images/food-recognition-2.png');
    background-size: 100% 1200%;
    background-position: 0 calc(var(--index) * -100%);
    background-repeat: no-repeat;
}

/* 营养仪表盘 - 垂直百叶窗条带显示图片切片 */
.screenshot-dashboard-1 .blind-stripe {
    background-image: url('images/nutrition-dashboard-1.png');
    background-size: 1200% 100%; /* 12个条带，宽度放大12倍 */
    background-position: calc(var(--index) * -100%) 0;
    background-repeat: no-repeat;
}

.screenshot-dashboard-2 .blind-stripe {
    background-image: url('images/nutrition-dashboard-2.png');
    background-size: 1200% 100%;
    background-position: calc(var(--index) * -100%) 0;
    background-repeat: no-repeat;
}

/* 旧的动画已移除，使用新的科技感动画 */

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.4; /* 从 1.2 增大到 1.4 */
    margin-bottom: 2rem; /* 从 1.5rem 增大到 2rem */
}

.title-main {
    display: block;
    background: linear-gradient(135deg, var(--neon-cyan), var(--neon-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 30px rgba(0, 255, 209, 0.5);
}

.title-subtitle {
    display: block;
    font-size: 2.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-top: 0.8rem; /* 从 0.5rem 增大到 0.8rem */
    line-height: 1.3; /* 新增行距 */
}

.hero-description {
    margin-bottom: 2rem;
}

.hero-tagline {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, 
        rgba(93, 217, 255, 0.15) 0%, 
        rgba(74, 158, 255, 0.15) 50%,
        rgba(74, 255, 136, 0.15) 100%);
    border: 1px solid rgba(93, 217, 255, 0.3);
    border-radius: 12px;
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

.hero-tagline::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, 
        transparent, 
        rgba(93, 217, 255, 0.2), 
        transparent);
    animation: shimmer-slide 3s infinite;
}

@keyframes shimmer-slide {
    0% {
        left: -100%;
    }
    100% {
        left: 100%;
    }
}

.tagline-text {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--neon-cyan), var(--neon-blue), var(--accent-green));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 20px rgba(93, 217, 255, 0.5);
    position: relative;
    z-index: 1;
}

.hero-description-text {
    font-size: 1.3rem; /* 从 1.4rem 减少1号 */
    color: var(--text-secondary);
    line-height: 2.2;
}

.highlight {
    color: var(--neon-cyan);
    font-weight: 700;
    text-shadow: 0 0 15px var(--glow-cyan), 0 0 25px var(--glow-blue);
}

.hero-stats {
    display: flex;
    gap: 2.5rem; /* 从 2rem 增大到 2.5rem，让间距更宽松 */
    margin-bottom: 3rem;
    flex-wrap: nowrap; /* 不允许换行，保持5个数字在一行 */
}

.stat-item {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    min-width: 0; /* 防止内容溢出 */
    flex: 0 1 auto; /* 允许收缩，不强制等宽 */
}

.stat-number {
    font-size: 1.6rem; /* 从 2rem 减小2号 */
    font-weight: 700;
}

.stat-label {
    font-size: 0.75rem; /* 从 0.9rem 减小2号 */
    color: var(--text-muted);
}

.neon-text {
    background: linear-gradient(135deg, var(--neon-cyan), var(--neon-blue), var(--accent-green));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
    filter: drop-shadow(0 0 8px var(--glow-cyan));
}

.download-btn {
    position: relative;
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
    font-weight: 600;
    color: #000000;
    background: linear-gradient(135deg, var(--accent-green), var(--neon-cyan));
    border: none;
    border-radius: 50px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
    box-shadow: 0 4px 20px var(--glow-green), 0 0 40px var(--glow-cyan);
}

.download-btn.large {
    padding: 1.25rem 3rem;
    font-size: 1.25rem;
}

.download-btn:hover {
    transform: translateY(-3px) scale(1.02);
    background: linear-gradient(135deg, var(--neon-cyan), var(--neon-blue));
    box-shadow: 0 6px 30px var(--glow-cyan), 0 0 60px var(--glow-blue), 0 0 80px rgba(74, 158, 255, 0.3);
}

.download-btn:active {
    transform: translateY(-1px) scale(1);
}

.btn-glow {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.3), transparent);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.download-btn:hover .btn-glow {
    opacity: 1;
    animation: rotate-glow 2s infinite linear;
}

@keyframes rotate-glow {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

.hero-cta {
    display: none; /* 暂时隐藏，APP未上架 */
    align-items: center;
    gap: 2rem;
    margin-top: 2rem;
}

.hero-qr-code {
    width: 100px;
    height: 100px;
    background: var(--bg-card);
    border: 2px solid var(--border-neon);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 15px rgba(93, 217, 255, 0.3);
    transition: all 0.3s ease;
}

.hero-qr-code:hover {
    box-shadow: 0 0 25px rgba(93, 217, 255, 0.5);
    transform: scale(1.05);
}

.qr-pattern-small {
    width: 80%;
    height: 80%;
    background: 
        linear-gradient(90deg, var(--neon-cyan) 20%, transparent 20%),
        linear-gradient(var(--neon-cyan) 20%, transparent 20%);
    background-size: 8px 8px;
    border-radius: 6px;
    opacity: 0.6;
}

.download-hint {
    margin-top: 1rem;
    font-size: 0.9rem;
    color: var(--text-muted);
    text-align: center;
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-muted);
    font-size: 0.85rem;
    animation: bounce 2s infinite;
}

.scroll-line {
    width: 2px;
    height: 30px;
    background: linear-gradient(180deg, var(--neon-cyan), transparent);
    animation: scroll-line 2s infinite;
}

@keyframes scroll-line {
    0% {
        opacity: 1;
        transform: translateY(0);
    }
    100% {
        opacity: 0;
        transform: translateY(20px);
    }
}

@keyframes bounce {
    0%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    50% {
        transform: translateX(-50%) translateY(-10px);
    }
}

/* ============================================
   通用区块样式
   ============================================ */
section {
    position: relative;
    padding: 6rem 0;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.section-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    width: 100%;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

.title-icon {
    font-size: 2.5rem;
}

.section-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
}

/* ============================================
   核心功能区
   ============================================ */
.features {
    background: var(--bg-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.feature-card {
    position: relative;
    background: var(--bg-card);
    border: 2px solid var(--border-neon);
    border-radius: 20px;
    padding: 0;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
    backdrop-filter: blur(10px);
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(93, 217, 255, 0.08), rgba(74, 158, 255, 0.08));
    opacity: 0;
    transition: opacity 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.feature-card:hover::before {
    opacity: 1;
}

.card-glow {
    position: absolute;
    top: -3px;
    left: -3px;
    right: -3px;
    bottom: -3px;
    background: linear-gradient(135deg, var(--neon-cyan), var(--neon-blue), var(--accent-green));
    border-radius: 20px;
    opacity: 0;
    filter: blur(15px);
    transition: opacity 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: -1;
}

.feature-card:hover {
    transform: translateY(-10px) scale(1.02);
    border-color: var(--neon-cyan);
    box-shadow: 0 10px 40px var(--glow-blue), 0 0 60px var(--glow-cyan);
}

.feature-card:hover .card-glow {
    opacity: 0.6;
}

/* 现代扁平风格的通栏Icon区域 */
.feature-icon-banner {
    width: 100%;
    margin: 0;
    padding: 1.0625rem 2.5rem; /* 从 2rem 减少15像素 (2rem=32px, 32-15=17px≈1.0625rem) */
    background: linear-gradient(135deg, 
        rgba(93, 217, 255, 0.08) 0%, 
        rgba(74, 158, 255, 0.08) 100%);
    border-bottom: 1px solid rgba(93, 217, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    border-radius: 18px 18px 0 0;
}

.feature-icon-banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: -50%;
    width: 200%;
    height: 100%;
    background: linear-gradient(90deg, 
        transparent 0%, 
        rgba(93, 217, 255, 0.1) 50%, 
        transparent 100%);
    animation: shimmer 3s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* 第二个卡片的渐变配色 */
.banner-2 {
    background: linear-gradient(135deg, 
        rgba(74, 158, 255, 0.08) 0%, 
        rgba(74, 255, 136, 0.08) 100%);
    border-bottom: 1px solid rgba(74, 158, 255, 0.2);
}

/* 第三个卡片的渐变配色 */
.banner-3 {
    background: linear-gradient(135deg, 
        rgba(74, 255, 136, 0.08) 0%, 
        rgba(93, 217, 255, 0.08) 100%);
    border-bottom: 1px solid rgba(74, 255, 136, 0.2);
}

/* 扁平现代风格的Icon */
.icon-flat {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 16px;
    border: 2px solid var(--neon-cyan);
    box-shadow: 
        0 0 20px rgba(93, 217, 255, 0.3),
        inset 0 0 20px rgba(93, 217, 255, 0.1);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    z-index: 1;
}

.icon-flat svg {
    color: var(--neon-cyan);
    filter: drop-shadow(0 0 8px rgba(93, 217, 255, 0.6));
    transition: all 0.3s ease;
}

.feature-card:hover .icon-flat {
    transform: translateY(-5px) scale(1.05);
    box-shadow: 
        0 5px 30px rgba(93, 217, 255, 0.5),
        inset 0 0 30px rgba(93, 217, 255, 0.2);
    border-color: var(--accent-green);
}

.feature-card:hover .icon-flat svg {
    color: var(--accent-green);
    filter: drop-shadow(0 0 12px rgba(74, 255, 136, 0.8));
    transform: scale(1.1);
}

.feature-content {
    padding: 2rem 2.5rem 2.5rem;
}

.feature-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--neon-cyan);
}

.feature-description {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.feature-image {
    position: relative;
    width: 100%;
    aspect-ratio: 16/9;
    border-radius: 15px;
    overflow: hidden;
    border: 1px solid var(--border-neon);
}

.image-placeholder {
    width: 100%;
    height: 100%;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* 第二屏核心功能区图片 */
.image-placeholder.food-recognition {
    background-image: url('images/feature-food.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.image-placeholder.nutrition-dashboard {
    background-image: url('images/feature-dashboard.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.image-placeholder.personalized-plan {
    background-image: url('images/feature-plan.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.image-glow {
    position: absolute;
    top: -20px;
    left: -20px;
    right: -20px;
    bottom: -20px;
    background: linear-gradient(135deg, var(--neon-cyan), var(--neon-blue));
    filter: blur(20px);
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: -1;
}

.feature-card:hover .image-glow {
    opacity: 0.3;
}

/* ============================================
   场景价值区
   ============================================ */
.scenarios {
    background: var(--bg-primary);
}

.scenarios-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.scenario-card {
    position: relative;
    background: var(--bg-card);
    border: 2px solid var(--border-neon);
    border-radius: 20px;
    overflow: hidden;
    transition: all 0.4s ease;
    backdrop-filter: blur(10px);
}

.scenario-glow {
    position: absolute;
    top: -3px;
    left: -3px;
    right: -3px;
    bottom: -3px;
    background: linear-gradient(135deg, var(--accent-green), var(--neon-cyan), var(--neon-blue));
    opacity: 0;
    filter: blur(15px);
    transition: opacity 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: -1;
}

.scenario-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 10px 40px var(--glow-green), 0 0 60px var(--glow-cyan);
    border-color: var(--accent-green);
}

.scenario-card:hover .scenario-glow {
    opacity: 0.5;
}

.scenario-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    padding: 0.5rem 1rem;
    background: linear-gradient(135deg, var(--neon-green), var(--neon-cyan));
    color: var(--bg-primary);
    font-size: 0.85rem;
    font-weight: 600;
    border-radius: 20px;
    z-index: 1;
    box-shadow: 0 0 15px rgba(0, 255, 136, 0.5);
}

.scenario-image {
    width: 100%;
    height: 200px;
    overflow: hidden;
}

.scenario-img-placeholder {
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    transition: transform 0.4s ease;
}

.scenario-card:hover .scenario-img-placeholder {
    transform: scale(1.1);
}

/* 第三屏使用场景区图片 */
.scenario-img-placeholder.weight-loss {
    background-image: url('images/scenario-weight-loss.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.scenario-img-placeholder.body-management {
    background-image: url('images/scenario-fitness.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.scenario-img-placeholder.health-maintenance {
    background-image: url('images/scenario-health.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.scenario-content {
    padding: 2rem;
}

.scenario-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--neon-cyan);
}

.scenario-description {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.scenario-testimonial {
    display: flex;
    gap: 1rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-neon);
}

.testimonial-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: rgba(0, 255, 209, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.testimonial-text {
    flex: 1;
}

.testimonial-quote {
    color: var(--text-primary);
    font-style: italic;
    margin-bottom: 0.5rem;
    line-height: 1.6;
}

.testimonial-author {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.testimonial-date {
    color: rgba(255, 255, 255, 0.35);
    font-size: 0.85rem;
    margin-left: 0.5rem;
}

/* ============================================
   数据安全区
   ============================================ */
.security {
    background: var(--bg-secondary);
}

.security-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 4rem;
    align-items: center;
}

.security-right {
    text-align: left;
}

.security-right .section-title {
    text-align: left;
    justify-content: flex-start;
}

.security-icon-wrapper {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    align-items: center;
}

.security-icon {
    position: relative;
    width: 150px;
    height: 150px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    border-radius: 30px;
    background: var(--bg-card);
    border: 3px solid var(--border-neon);
    box-shadow: var(--shadow-neon);
    transition: all 0.3s ease;
}

.security-icon:hover {
    transform: scale(1.1) rotate(5deg);
    box-shadow: var(--shadow-neon-strong);
}

.icon-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(0, 255, 209, 0.1), rgba(0, 176, 255, 0.1));
    border-radius: 30px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.security-icon:hover .icon-bg {
    opacity: 1;
}

.security-description {
    font-size: 1.3rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.security-features {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.security-feature-item {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.feature-check {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--neon-green), var(--neon-cyan));
    color: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    flex-shrink: 0;
    box-shadow: 0 0 10px rgba(0, 255, 136, 0.5);
}

.feature-text {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.feature-text strong {
    color: var(--neon-cyan);
    font-weight: 600;
}

.feature-text span {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ============================================
   CTA 区域
   ============================================ */
.cta {
    background: var(--bg-primary);
    position: relative;
    overflow: hidden;
    padding-bottom: 0;
}

.cta-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
}

.cta-gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.2;
    animation: float 25s infinite ease-in-out;
}

.cta-gradient-orb.orb-1 {
    width: 500px;
    height: 500px;
    background: linear-gradient(135deg, var(--neon-cyan), var(--neon-blue));
    top: -250px;
    left: -250px;
}

.cta-gradient-orb.orb-2 {
    width: 400px;
    height: 400px;
    background: linear-gradient(135deg, var(--neon-blue), var(--neon-green));
    bottom: -200px;
    right: -200px;
    animation-delay: 10s;
}

.cta-content {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: 6rem 0 2rem;
}

.cta-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.cta-subtitle {
    font-size: 1.3rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
}

.cta-buttons {
    display: flex; /* 改为flex，用于显示footer */
    justify-content: center;
    align-items: center;
    gap: 3rem;
    margin-bottom: 3rem;
}

.qr-code-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.qr-code {
    width: 150px;
    height: 150px;
    background: var(--bg-card);
    border: 2px solid var(--border-neon);
    border-radius: 15px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    box-shadow: var(--shadow-neon);
}

.qr-pattern {
    width: 100px;
    height: 100px;
    background: 
        repeating-linear-gradient(0deg, #000 0px, #000 5px, transparent 5px, transparent 10px),
        repeating-linear-gradient(90deg, #000 0px, #000 5px, transparent 5px, transparent 10px);
    border-radius: 5px;
}

.qr-code p {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.cta-stats {
    display: flex;
    justify-content: center;
    gap: 4rem;
}

.cta-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.cta-stat .stat-number {
    font-size: 2.5rem;
    font-weight: 700;
}

.cta-stat .stat-label {
    font-size: 1rem;
    color: var(--text-muted);
}

/* ============================================
   页脚
   ============================================ */
.footer {
    position: relative;
    z-index: 1;
    background: var(--bg-primary);
    border-top: 1px solid var(--border-neon);
    padding: 2.5rem 0 1.5rem;
    width: 100%;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.footer-content {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 2rem;
}

.footer-brand {
    text-align: center;
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--neon-cyan);
    display: block;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--neon-cyan);
}

.footer-copyright {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
    padding-top: 0;
}

/* ============================================
   滚动动画
   ============================================ */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   响应式设计
   ============================================ */
@media (max-width: 1400px) {
    .hero-title {
        font-size: 3.5rem;
    }
    
    .title-subtitle {
        font-size: 2rem;
    }
}

@media (max-width: 1200px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .hero-left {
        order: 2;
        text-align: center;
    }
    
    .hero-right {
        order: 1;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .app-preview-container {
        min-height: 500px;
        gap: 1.5rem;
        justify-content: center;
        margin-left: 0;
    }
    
    .preview-1,
    .preview-2 {
        transform: translateY(0) rotateY(0) rotateX(0) rotateZ(0) scale(1);
    }
    
    .phone-frame {
        max-width: 320px;
        min-width: 280px;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .features-grid,
    .scenarios-grid {
        grid-template-columns: 1fr;
    }
    
    .security-content {
        grid-template-columns: 1fr;
    }
    
    .security-icon-wrapper {
        flex-direction: row;
        justify-content: center;
    }
    
    .cta-buttons {
        flex-direction: column;
    }
    
    .footer-content {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .footer-brand {
        text-align: center;
        margin-bottom: 1rem;
    }
    
    .footer-links {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .nav-links {
        gap: 1rem;
        font-size: 0.9rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .title-subtitle {
        font-size: 1.5rem;
    }
    
    .app-preview-container {
        flex-direction: column;
        min-height: auto;
        gap: 2rem;
    }
    
    .phone-frame {
        max-width: 300px;
        min-width: 250px;
    }
    
    .preview-label {
        position: static;
        transform: none;
        margin-top: 1rem;
        opacity: 1;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .cta-title {
        font-size: 2.5rem;
    }
    
    .cta-stats {
        flex-direction: column;
        gap: 2rem;
    }
}

/* ============================================
   关于我们页面样式
   ============================================ */
.about-hero {
    position: relative;
    min-height: 60vh;
    display: flex;
    align-items: center;
    padding-top: 100px;
    overflow: hidden;
}

.about-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
    overflow: hidden;
}

.about-header {
    position: relative;
    z-index: 1;
    text-align: left;
    padding: 3rem 0;
}

.about-main-title {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 3rem;
    background: linear-gradient(135deg, var(--neon-cyan), var(--neon-blue), var(--accent-green));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 30px rgba(93, 217, 255, 0.5);
    filter: drop-shadow(0 0 20px var(--glow-cyan));
}

.about-section {
    position: relative;
    padding: 6rem 0;
    background: var(--bg-primary);
}

.about-section-alt {
    background: var(--bg-secondary);
}

.about-content-block {
    max-width: 1000px;
    margin: 0;
    text-align: left;
}

.about-section-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 2.5rem;
    color: var(--neon-cyan);
    text-align: left;
    line-height: 1.3;
}

.about-text-content {
    margin-bottom: 3rem;
}

.about-paragraph {
    font-size: 1.2rem;
    line-height: 2;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    text-align: justify;
}

.about-paragraph:last-child {
    margin-bottom: 0;
}

.about-feature-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2.5rem;
    margin: 0 auto 3rem;
    max-width: 1100px;
    justify-items: center;
    justify-content: center;
}

.about-feature-item {
    background: var(--bg-card);
    border: 2px solid var(--border-neon);
    border-radius: 20px;
    padding: 2rem 2.5rem;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
    width: 100%;
}

.about-feature-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(93, 217, 255, 0.08), rgba(74, 158, 255, 0.08));
    opacity: 0;
    transition: opacity 0.4s ease;
}

.about-feature-item:hover::before {
    opacity: 1;
}

.about-feature-item:hover {
    transform: translateY(-8px);
    border-color: var(--neon-cyan);
    box-shadow: 0 10px 40px var(--glow-blue), 0 0 60px var(--glow-cyan);
}

.about-feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 0 1.2rem 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 20px;
    border: 2px solid var(--neon-cyan);
    box-shadow: 
        0 0 20px rgba(93, 217, 255, 0.3),
        inset 0 0 20px rgba(93, 217, 255, 0.1);
    color: var(--neon-cyan);
    transition: all 0.3s ease;
    position: relative;
    z-index: 1;
}

.about-feature-item:hover .about-feature-icon {
    transform: scale(1.1);
    border-color: var(--accent-green);
    box-shadow: 
        0 5px 30px rgba(93, 217, 255, 0.5),
        inset 0 0 30px rgba(93, 217, 255, 0.2);
    color: var(--accent-green);
}

.about-feature-title {
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--neon-cyan);
    text-align: left;
    position: relative;
    z-index: 1;
}

.about-feature-text {
    font-size: 1.05rem;
    line-height: 1.75;
    color: var(--text-secondary);
    text-align: justify;
    position: relative;
    z-index: 1;
}

.about-beliefs-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    margin: 2rem auto 0;
    max-width: 1100px;
    justify-items: center;
    justify-content: center;
}

.about-belief-item {
    background: var(--bg-card);
    border: 2px solid var(--border-neon);
    border-radius: 18px;
    padding: 1.8rem 2.2rem;
    transition: all 0.4s ease;
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
    width: 100%;
}

.about-belief-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(93, 217, 255, 0.06), rgba(74, 158, 255, 0.06));
    opacity: 0;
    transition: opacity 0.4s ease;
}

.about-belief-item:hover::before {
    opacity: 1;
}

.about-belief-item:hover {
    transform: translateY(-5px);
    border-color: var(--neon-cyan);
    box-shadow: 0 8px 30px var(--glow-blue), 0 0 50px var(--glow-cyan);
}

.belief-icon {
    font-size: 1.5rem;
    color: var(--neon-cyan);
    margin-bottom: 0.8rem;
    filter: drop-shadow(0 0 8px rgba(93, 217, 255, 0.6));
}

.about-belief-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.8rem;
    color: var(--neon-cyan);
    position: relative;
    z-index: 1;
}

.about-belief-text {
    font-size: 1.05rem;
    line-height: 1.75;
    color: var(--text-secondary);
    text-align: justify;
    position: relative;
    z-index: 1;
}

.about-mission {
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    position: relative;
    overflow: hidden;
}

.about-mission::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 50% 50%, rgba(93, 217, 255, 0.1), transparent 70%);
    pointer-events: none;
}

.about-mission-content {
    max-width: 1100px;
    margin: 3rem 0 0;
    text-align: left;
    position: relative;
    z-index: 1;
    padding-top: 3rem;
}

.about-mission-text {
    font-size: 1.3rem;
    line-height: 2;
    color: var(--text-secondary);
    margin: 0;
    text-align: left;
}

.about-footer {
    background: var(--bg-primary);
    border-top: 1px solid var(--border-neon);
    padding: 2.5rem 0 1.5rem;
    margin-top: 0;
}

/* 响应式设计 - 关于我们页面 */
@media (max-width: 1200px) {
    .about-main-title {
        font-size: 3.5rem;
    }
    
    .about-section-title {
        font-size: 2.5rem;
    }
    
    .about-feature-grid,
    .about-beliefs-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .about-main-title {
        font-size: 2.5rem;
    }
    
    .about-section-title {
        font-size: 2rem;
    }
    
    .about-paragraph {
        font-size: 1.1rem;
    }
    
    .about-feature-title {
        font-size: 1.5rem;
    }
    
    .about-feature-text,
    .about-belief-text {
        font-size: 1rem;
    }
    
    .about-mission-text {
        font-size: 1.2rem;
    }
}

/* ============================================
   联系我们页面样式
   ============================================ */
.contact-hero {
    position: relative;
    display: flex;
    align-items: flex-start;
    padding: 100px 0 0 0 !important;
    min-height: 230px !important;
    height: 230px !important;
    overflow: hidden;
}

.contact-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
    overflow: hidden;
}

.contact-header {
    position: relative;
    z-index: 1;
    text-align: left;
    padding: 0;
    margin: 0;
}

.contact-main-title {
    font-size: 3rem;
    font-weight: 800;
    margin: 0 0 0.5rem 0;
    background: linear-gradient(135deg, var(--neon-cyan), var(--neon-blue), var(--accent-green));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 30px rgba(93, 217, 255, 0.5);
    filter: drop-shadow(0 0 20px var(--glow-cyan));
}

.contact-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
}

.contact-section {
    position: relative;
    padding: 4rem 0 6rem;
    background: var(--bg-secondary);
}

.contact-content {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 3rem;
    align-items: center;
}

.contact-form-wrapper {
    position: relative;
    width: 100%;
}

.contact-form {
    background: var(--bg-card);
    border: 2px solid var(--border-neon);
    border-radius: 20px;
    padding: 2.5rem;
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.contact-form::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(93, 217, 255, 0.05), rgba(74, 158, 255, 0.05));
    opacity: 0;
    transition: opacity 0.4s ease;
    pointer-events: none;
    z-index: 0;
}

.contact-form:hover::before {
    opacity: 1;
}

.contact-form:hover {
    border-color: var(--neon-cyan);
    box-shadow: 0 10px 40px var(--glow-blue), 0 0 60px var(--glow-cyan);
}

.form-group {
    margin-bottom: 2rem;
    position: relative;
    z-index: 1;
}

.form-label {
    display: block;
    font-size: 1rem;
    font-weight: 600;
    color: var(--neon-cyan);
    margin-bottom: 0.8rem;
    text-shadow: 0 0 8px rgba(93, 217, 255, 0.3);
}

.required {
    color: var(--accent-green);
    margin-left: 0.25rem;
}

.form-input,
.form-textarea {
    width: 100%;
    padding: 1rem 1.25rem;
    background: rgba(0, 0, 0, 0.4);
    border: 2px solid var(--border-neon);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 1rem;
    font-family: inherit;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    outline: none;
    pointer-events: auto;
    z-index: 1;
    position: relative;
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--text-muted);
}

.form-input:focus,
.form-textarea:focus {
    border-color: var(--neon-cyan);
    box-shadow: 0 0 20px rgba(93, 217, 255, 0.3), inset 0 0 20px rgba(93, 217, 255, 0.05);
    background: rgba(0, 0, 0, 0.5);
}

.form-textarea {
    resize: vertical;
    min-height: 150px;
    line-height: 1.6;
}

.contact-submit-btn {
    position: relative;
    width: 50%;
    margin: 1rem auto 0;
    padding: 0.75rem 1.8rem;
    font-size: 0.95rem;
    font-weight: 600;
    color: #000000;
    background: linear-gradient(135deg, var(--accent-green), var(--neon-cyan));
    border: none;
    border-radius: 50px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
    box-shadow: 0 4px 20px var(--glow-green), 0 0 40px var(--glow-cyan);
}

.contact-submit-btn:hover {
    transform: translateY(-3px) scale(1.02);
    background: linear-gradient(135deg, var(--neon-cyan), var(--neon-blue));
    box-shadow: 0 6px 30px var(--glow-cyan), 0 0 60px var(--glow-blue), 0 0 80px rgba(74, 158, 255, 0.3);
}

.contact-submit-btn:active {
    transform: translateY(-1px) scale(1);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact-info-simple {
    width: 100%;
    text-align: center;
    padding-top: 2rem;
}

.contact-info-label {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.contact-email-list {
    display: flex;
    flex-direction: row;
    gap: 2rem;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
}

.contact-email-item {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.contact-email-link {
    color: var(--neon-cyan);
    text-decoration: none;
    margin-left: 0.5rem;
    transition: all 0.3s ease;
}

.contact-email-link:hover {
    color: var(--accent-green);
    text-shadow: 0 0 8px rgba(0, 255, 136, 0.5);
}

.contact-info-card {
    background: var(--bg-card);
    border: 2px solid var(--border-neon);
    border-radius: 20px;
    padding: 2.5rem;
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.contact-info-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(93, 217, 255, 0.08), rgba(74, 158, 255, 0.08));
    opacity: 0;
    transition: opacity 0.4s ease;
}

.contact-info-card:hover::before {
    opacity: 1;
}

.contact-info-card:hover {
    transform: translateY(-5px);
    border-color: var(--neon-cyan);
    box-shadow: 0 10px 40px var(--glow-blue), 0 0 60px var(--glow-cyan);
}

.contact-info-icon {
    width: 64px;
    height: 64px;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 16px;
    border: 2px solid var(--neon-cyan);
    box-shadow: 
        0 0 20px rgba(93, 217, 255, 0.3),
        inset 0 0 20px rgba(93, 217, 255, 0.1);
    color: var(--neon-cyan);
    transition: all 0.3s ease;
    position: relative;
    z-index: 1;
}

.contact-info-card:hover .contact-info-icon {
    transform: scale(1.05);
    border-color: var(--accent-green);
    box-shadow: 
        0 5px 30px rgba(93, 217, 255, 0.5),
        inset 0 0 30px rgba(93, 217, 255, 0.2);
    color: var(--accent-green);
}

.contact-info-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--neon-cyan);
    position: relative;
    z-index: 1;
}

.contact-email {
    display: block;
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--accent-green);
    margin-bottom: 1rem;
    text-decoration: none;
    transition: all 0.3s ease;
    position: relative;
    z-index: 1;
    text-shadow: 0 0 10px rgba(0, 255, 136, 0.5);
}

.contact-email:hover {
    color: var(--neon-cyan);
    text-shadow: 0 0 15px var(--glow-cyan), 0 0 25px var(--glow-blue);
    transform: translateX(5px);
}

.contact-info-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
    position: relative;
    z-index: 1;
}

.contact-footer {
    background: var(--bg-primary);
    border-top: 1px solid var(--border-neon);
    padding: 2.5rem 0 1.5rem;
    margin-top: 0;
}

/* 表单成功提示弹窗 */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.form-success-modal {
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-content {
    background: var(--bg-card);
    border: 1px solid var(--border-neon);
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    min-width: 300px;
    max-width: 400px;
}

.success-icon {
    width: 50px;
    height: 50px;
    margin: 0 auto 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-green);
    border-radius: 50%;
    font-size: 1.5rem;
    color: #000000;
    font-weight: 700;
}

.modal-content h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 0.5rem 0;
}

.modal-content p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0 0 1.5rem 0;
}

.modal-close-btn {
    padding: 0.6rem 2rem;
    font-size: 0.95rem;
    font-weight: 600;
    color: #000000;
    background: var(--accent-green);
    border: none;
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.modal-close-btn:hover {
    background: var(--neon-cyan);
    transform: translateY(-2px);
}

/* 响应式设计 - 联系我们页面 */
@media (max-width: 1200px) {
    .contact-content {
        max-width: 100%;
    }
    
    .contact-main-title {
        font-size: 2.5rem;
    }
}

@media (max-width: 768px) {
    .contact-main-title {
        font-size: 2rem;
    }
    
    .contact-subtitle {
        font-size: 1rem;
    }
    
    .contact-form {
        padding: 2rem;
    }
    
    .contact-info-card {
        padding: 2rem;
    }
}