/* ============================================
   主题色配置（修改以下变量即可全局换色）
   ============================================ */
:root {
    /* ---- 主色系 ---- */
    --color-primary: #A7CB4D;              /* 主色 - 品牌色 */
    --color-primary-dark: #8BB83A;         /* 主色深色（渐变终点、hover） */
    --color-primary-light: #C8E384;        /* 主色浅色（hover亮色） */
    --color-primary-rgb: 167, 203, 77;     /* RGB数值（用于rgba阴影） */

    /* ---- 辅助色 ---- */
    --color-accent: #F5A623;               /* 点缀色 */
    --color-bg-light: #F8FAF0;             /* 浅色背景 */
    --color-bg-white: #ffffff;             /* 纯白背景 */

    /* ---- 文字色 ---- */
    --color-text-primary: #1a1a2e;         /* 主要文字 */
    --color-text-secondary: #5a5a7a;       /* 次要文字 */
    --color-text-light: #999;              /* 浅色文字 */
    --color-text-inverse: #ffffff;         /* 反白文字 */

    /* ---- 页脚 ---- */
    --color-footer-bg: #1e1e2e;            /* 页脚背景 */

    /* ---- 字体 ---- */
    --font-family: 'PingFang SC', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, sans-serif;

    /* ---- 圆角 ---- */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 20px;
    --radius-full: 50px;

    /* ---- 阴影 ---- */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.12);
    --shadow-primary: 0 8px 25px rgba(var(--color-primary-rgb), 0.25);

    /* ---- 渐变 ---- */
    --gradient-primary: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);

    /* ---- 过渡 ---- */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ============================================
   全局样式
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background-color: var(--color-bg-light);
    color: var(--color-text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

#app {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ============================================
   顶部导航
   ============================================ */
.top-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    z-index: 1000;
    padding: 16px 0;
    transition: box-shadow var(--transition-normal);
}

.top-nav.scrolled {
    box-shadow: var(--shadow-sm);
}

.nav-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 20px;
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: 0.5px;
}

.nav-logo img {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    object-fit: cover;
}

.nav-links {
    display: flex;
    gap: 32px;
    list-style: none;
}

.nav-links a {
    color: var(--color-text-primary);
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    position: relative;
    padding: 4px 0;
    transition: color var(--transition-fast);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    border-radius: 2px;
    transition: width var(--transition-normal);
}

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

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

.nav-menu-toggle {
    display: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--color-primary);
    transition: transform var(--transition-fast);
}

.nav-menu-toggle:hover {
    transform: scale(1.1);
}

/* ============================================
   首屏展示区
   ============================================ */
.hero-section {
    padding-top: 140px;
    padding-bottom: 100px;
    background: var(--gradient-primary);
    color: var(--color-text-inverse);
    position: relative;
    overflow: hidden;
}

/* 装饰性背景圆 */
.hero-section::before {
    content: '';
    position: absolute;
    top: -30%;
    right: -10%;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.06);
    pointer-events: none;
}

.hero-section::after {
    content: '';
    position: absolute;
    bottom: -20%;
    left: -5%;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.04);
    pointer-events: none;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-text h1 {
    font-size: 52px;
    margin-bottom: 16px;
    font-weight: 800;
    letter-spacing: 2px;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 22px;
    margin-bottom: 20px;
    opacity: 0.95;
    font-weight: 500;
}

.hero-desc {
    font-size: 17px;
    margin-bottom: 32px;
    opacity: 0.88;
    line-height: 1.8;
    max-width: 480px;
}

.hero-meta {
    display: flex;
    gap: 32px;
    margin-bottom: 40px;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    opacity: 0.85;
    background: rgba(255, 255, 255, 0.12);
    padding: 8px 16px;
    border-radius: var(--radius-full);
    backdrop-filter: blur(4px);
}

.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-image img {
    width: 100%;
    max-width: 380px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-16px);
    }
}

/* ============================================
   特色功能区
   ============================================ */
.features-section {
    padding: 100px 0;
    background-color: var(--color-bg-light);
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-header h2 {
    font-size: 36px;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: 12px;
    letter-spacing: 1px;
}

.section-header h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: var(--gradient-primary);
    border-radius: 3px;
    margin: 16px auto 0;
}

.section-subtitle {
    font-size: 16px;
    color: var(--color-text-secondary);
    margin-top: 8px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 28px;
}

.feature-card {
    background-color: var(--color-bg-white);
    padding: 44px 32px 40px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
    text-align: center;
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(0, 0, 0, 0.04);
}

/* 卡片顶部装饰条 */
.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-slow);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-md);
    border-color: rgba(var(--color-primary-rgb), 0.15);
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-icon {
    font-size: 48px;
    color: var(--color-primary);
    margin-bottom: 24px;
    display: inline-block;
    transition: transform var(--transition-normal);
}

.feature-card:hover .feature-icon {
    transform: scale(1.1);
}

.feature-card h3 {
    font-size: 22px;
    margin-bottom: 16px;
    color: var(--color-text-primary);
    font-weight: 600;
}

.feature-card p {
    font-size: 15px;
    color: var(--color-text-secondary);
    line-height: 1.8;
}

/* ============================================
   公司介绍区
   ============================================ */
.company-section {
    padding: 100px 0;
    background-color: var(--color-bg-white);
    position: relative;
}

.company-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.company-info h2 {
    font-size: 32px;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: 20px;
    letter-spacing: 0.5px;
}

.company-desc {
    font-size: 16px;
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: 32px;
}

.company-features {
    margin-bottom: 32px;
}

.company-feature-item {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 16px;
    color: var(--color-text-primary);
    margin-bottom: 14px;
    font-weight: 500;
}

.company-feature-item i {
    color: var(--color-primary);
    font-size: 18px;
}

.company-mission {
    font-size: 18px;
    color: var(--color-primary);
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 24px;
    background: rgba(var(--color-primary-rgb), 0.08);
    border-radius: var(--radius-sm);
    border-left: 4px solid var(--color-primary);
}

.company-visual {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.visual-card {
    background-color: var(--color-bg-light);
    padding: 32px 24px;
    border-radius: var(--radius-md);
    text-align: center;
    transition: all var(--transition-normal);
    border: 1px solid transparent;
    cursor: default;
}

.visual-card:hover {
    transform: translateY(-6px);
    background-color: var(--color-bg-white);
    border-color: rgba(var(--color-primary-rgb), 0.2);
    box-shadow: var(--shadow-primary);
}

.visual-card i {
    font-size: 40px;
    color: var(--color-primary);
    margin-bottom: 14px;
    transition: transform var(--transition-normal);
}

.visual-card:hover i {
    transform: scale(1.15);
}

.visual-card span {
    font-size: 15px;
    color: var(--color-text-primary);
    font-weight: 600;
    display: block;
}

/* ============================================
   下载引导区
   ============================================ */
.download-section {
    padding: 100px 0;
    background: var(--gradient-primary);
    color: var(--color-text-inverse);
    text-align: center;
    position: relative;
    overflow: hidden;
}

/* 装饰圆点 */
.download-section::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 800px;
    height: 800px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.04);
    transform: translate(-50%, -50%);
    pointer-events: none;
}

.download-content {
    position: relative;
    z-index: 1;
}

.download-content h2 {
    font-size: 38px;
    font-weight: 700;
    margin-bottom: 16px;
    letter-spacing: 1px;
}

.download-content p {
    font-size: 17px;
    margin-bottom: 44px;
    opacity: 0.88;
}

.download-actions {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ============================================
   按钮样式
   ============================================ */
.btn {
    padding: 16px 38px;
    border-radius: var(--radius-full);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    letter-spacing: 0.3px;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background-color: var(--color-bg-white);
    color: var(--color-primary);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.2);
}

.btn-secondary {
    background-color: rgba(255, 255, 255, 0.12);
    color: var(--color-text-inverse);
    border: 2px solid rgba(255, 255, 255, 0.25);
    backdrop-filter: blur(4px);
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.4);
    transform: translateY(-3px);
}

/* ============================================
   页脚信息
   ============================================ */
.main-footer {
    background-color: var(--color-footer-bg);
    color: var(--color-text-light);
    padding: 60px 0 32px;
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.footer-info {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 20px;
    font-weight: 700;
    color: var(--color-text-inverse);
    margin-bottom: 12px;
    letter-spacing: 0.5px;
}

.footer-logo img {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    object-fit: cover;
}

.footer-desc {
    font-size: 14px;
    margin-bottom: 24px;
    opacity: 0.7;
    letter-spacing: 0.5px;
}

.footer-links {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    justify-content: center;
    margin-bottom: 8px;
}

.footer-links a {
    color: var(--color-text-light);
    text-decoration: none;
    font-size: 14px;
    transition: color var(--transition-fast);
    position: relative;
}

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

.footer-links span {
    opacity: 0.3;
}

.footer-copyright {
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.footer-copyright p {
    font-size: 13px;
    margin-bottom: 6px;
    opacity: 0.6;
}

.footer-copyright a {
    color: var(--color-primary);
    text-decoration: none;
    opacity: 0.8;
    transition: opacity var(--transition-fast);
}

.footer-copyright a:hover {
    opacity: 1;
}

/* ============================================
   页面进入动画
   ============================================ */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-section,
.features-section,
.company-section,
.download-section {
    animation: fadeInUp 0.8s ease-out both;
}

.features-section {
    animation-delay: 0.1s;
}

.company-section {
    animation-delay: 0.2s;
}

.download-section {
    animation-delay: 0.3s;
}

/* ============================================
   响应式设计
   ============================================ */

/* 平板 */
@media (max-width: 992px) {
    .hero-content,
    .company-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-text h1 {
        font-size: 40px;
    }

    .hero-subtitle {
        font-size: 20px;
    }

    .hero-desc {
        margin: 0 auto 30px;
    }

    .hero-actions {
        justify-content: center;
    }

    .hero-meta {
        justify-content: center;
    }

    .company-visual {
        justify-content: center;
    }

    .company-mission {
        justify-content: center;
    }
}

/* 手机横屏/大手机 */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 68px;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 20px 24px;
        box-shadow: var(--shadow-md);
        border-top: 1px solid rgba(0, 0, 0, 0.05);
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links a {
        padding: 14px 0;
        font-size: 16px;
        border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    }

    .nav-links a:last-child {
        border-bottom: none;
    }

    .nav-menu-toggle {
        display: block;
    }

    .hero-section {
        padding-top: 120px;
        padding-bottom: 60px;
    }

    .hero-text h1 {
        font-size: 32px;
    }

    .hero-subtitle {
        font-size: 18px;
    }

    .hero-meta {
        flex-direction: column;
        gap: 12px;
        align-items: center;
    }

    .hero-image img {
        max-width: 280px;
    }

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

    .section-header h2 {
        font-size: 28px;
    }

    .company-info h2 {
        font-size: 28px;
    }

    .visual-card {
        padding: 24px 16px;
    }

    .download-content h2 {
        font-size: 28px;
    }

    .download-actions {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 320px;
        justify-content: center;
    }

    .main-footer {
        padding: 44px 0 24px;
    }
}

/* 小屏手机 */
@media (max-width: 480px) {
    .hero-section {
        padding-top: 100px;
        padding-bottom: 40px;
    }

    .hero-text h1 {
        font-size: 28px;
    }

    .hero-desc {
        font-size: 14px;
    }

    .features-section,
    .company-section,
    .download-section {
        padding: 60px 0;
    }

    .feature-card {
        padding: 32px 20px;
    }

    .feature-icon {
        font-size: 40px;
    }

    .feature-card h3 {
        font-size: 20px;
    }

    .company-features {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }

    .company-visual {
        gap: 12px;
    }

    .visual-card {
        padding: 20px 12px;
    }

    .visual-card i {
        font-size: 32px;
    }

    .btn {
        padding: 14px 28px;
        font-size: 15px;
    }

    .main-footer {
        padding: 32px 0 20px;
    }
}