/* ============================================
   主题色配置（修改以下变量即可全局换色）
   ============================================ */
:root {
    /* ---- 主色系 ---- */
    --color-primary: #254B8C;              /* 主色 - 品牌深蓝 */
    --color-primary-dark: #1A3A6E;         /* 主色深色（渐变终点、hover） */
    --color-primary-light: #FFDE00;        /* 主色浅色（金色点缀） */
    --color-primary-rgb: 37, 75, 140;      /* RGB数值（用于rgba阴影） */

    /* ---- 辅助色 ---- */
    --color-accent: #FFDE00;               /* 点缀色 - 金色 */
    --color-bg-light: #F5F7FA;             /* 浅色背景 */
    --color-bg-white: #ffffff;             /* 纯白背景 */

    /* ---- 文字色 ---- */
    --color-text-primary: #1C1C1E;         /* 主要文字 */
    --color-text-secondary: #6E6E73;       /* 次要文字 */
    --color-text-light: #AEAEB2;           /* 浅色文字 */
    --color-text-inverse: #ffffff;         /* 反白文字 */

    /* ---- 页脚 ---- */
    --color-footer-bg: #1C1C1E;            /* 页脚背景 */

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

    /* ---- 圆角 ---- */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-full: 50px;

    /* ---- 阴影 ---- */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.06);

    /* ---- 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;
}

/* ============================================
   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-white);
    color: var(--color-text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1100px;
    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, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 1000;
    padding: 16px 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: 0.3px;
    text-decoration: none;
}

.nav-logo img {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    object-fit: cover;
}

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

.nav-links a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    transition: color var(--transition-fast);
}

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

.nav-cta {
    padding: 8px 22px;
    font-size: 14px;
    border-radius: var(--radius-full);
    color: var(--color-primary);
    background: rgba(var(--color-primary-rgb), 0.06);
    box-shadow: none;
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.nav-cta:hover {
    background: var(--color-primary);
    color: var(--color-text-inverse);
}

.nav-menu-toggle {
    display: none;
    font-size: 22px;
    cursor: pointer;
    color: var(--color-text-primary);
}

/* ============================================
   首屏展示区
   ============================================ */
.hero-section {
    padding-top: 130px;
    padding-bottom: 90px;
    background: var(--color-bg-white);
    color: var(--color-text-primary);
    position: relative;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 520px;
    background: var(--gradient-primary);
    clip-path: polygon(0 0, 100% 0, 100% 75%, 0 100%);
    pointer-events: none;
}

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

.hero-text {
    color: var(--color-text-inverse);
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    font-size: 12px;
    font-weight: 500;
    color: var(--color-accent);
    background: rgba(255, 255, 255, 0.1);
    padding: 4px 14px;
    border-radius: var(--radius-full);
    margin-bottom: 20px;
    letter-spacing: 0.5px;
    border: 1px solid rgba(255, 255, 255, 0.12);
}

.hero-text h1 {
    font-size: 52px;
    margin-bottom: 14px;
    font-weight: 700;
    letter-spacing: 2px;
    line-height: 1.15;
}

.hero-desc {
    font-size: 18px;
    margin-bottom: 28px;
    opacity: 0.88;
    line-height: 1.7;
    max-width: 440px;
}

.hero-meta {
    display: flex;
    gap: 12px;
    margin-bottom: 32px;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    opacity: 0.7;
    background: rgba(255, 255, 255, 0.08);
    padding: 5px 12px;
    border-radius: var(--radius-full);
}

.hero-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

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

.hero-image img {
    width: 100%;
    max-width: 340px;
    border-radius: var(--radius-lg);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.12);
}

/* ============================================
   特色功能区
   ============================================ */
.features-section {
    padding: 90px 0;
    background-color: var(--color-bg-white);
}

.section-header {
    text-align: center;
    margin-bottom: 56px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.section-header h2 {
    font-size: 36px;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: 12px;
    letter-spacing: 0.3px;
}

.section-subtitle {
    font-size: 16px;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature-card {
    background-color: var(--color-bg-light);
    padding: 40px 28px 36px;
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
    text-align: center;
    border: 1px solid rgba(0, 0, 0, 0.04);
}

.feature-card:hover {
    background-color: var(--color-bg-white);
    border-color: rgba(var(--color-primary-rgb), 0.12);
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
}

.feature-icon {
    font-size: 32px;
    color: var(--color-primary);
    margin-bottom: 20px;
    display: inline-block;
}

.feature-card h3 {
    font-size: 20px;
    margin-bottom: 12px;
    color: var(--color-text-primary);
    font-weight: 600;
}

.feature-card p {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* ============================================
   公司介绍区
   ============================================ */
.company-section {
    padding: 90px 0;
    background-color: var(--color-bg-light);
}

.company-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.company-info h3 {
    font-size: 28px;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: 16px;
    letter-spacing: 0.3px;
    line-height: 1.3;
}

.company-mission i {
    font-size: 12px;
    opacity: 0.5;
    vertical-align: middle;
}

.company-desc {
    font-size: 15px;
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: 28px;
}

.company-features {
    margin-bottom: 28px;
}

.company-feature-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 15px;
    color: var(--color-text-primary);
    margin-bottom: 12px;
    font-weight: 500;
}

.company-feature-item i {
    color: var(--color-primary);
    font-size: 16px;
}

.company-mission {
    font-size: 16px;
    color: var(--color-primary);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    background: var(--color-bg-white);
    border-radius: var(--radius-sm);
    border: 1px solid rgba(var(--color-primary-rgb), 0.12);
}

.company-visual {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.visual-card {
    background-color: var(--color-bg-white);
    padding: 28px 20px;
    border-radius: var(--radius-md);
    text-align: center;
    transition: all var(--transition-normal);
    cursor: default;
    border: 1px solid rgba(0, 0, 0, 0.04);
}

.visual-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: rgba(var(--color-primary-rgb), 0.12);
}

.visual-card i {
    font-size: 30px;
    color: var(--color-primary);
    margin-bottom: 10px;
    display: block;
}

.visual-card span {
    font-size: 14px;
    color: var(--color-text-primary);
    font-weight: 600;
    display: block;
}

/* ============================================
   下载引导区
   ============================================ */
.download-section {
    padding: 90px 0;
    background: var(--gradient-primary);
    color: var(--color-text-inverse);
    text-align: center;
    position: relative;
}

.download-content h2 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 12px;
    letter-spacing: 0.5px;
}

.download-content p {
    font-size: 16px;
    margin-bottom: 40px;
    opacity: 0.85;
}

.download-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ============================================
   按钮样式
   ============================================ */
.btn {
    padding: 14px 34px;
    border-radius: var(--radius-full);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    letter-spacing: 0.3px;
    border: none;
}

.btn-primary {
    background-color: var(--color-bg-white);
    color: var(--color-primary);
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: rgba(255, 255, 255, 0.12);
    color: var(--color-text-inverse);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

/* ============================================
   页脚信息
   ============================================ */
.main-footer {
    background-color: var(--color-footer-bg);
    color: var(--color-text-light);
    padding: 48px 0 28px;
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: 28px;
}

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

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 18px;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 8px;
}

.footer-logo img {
    width: 30px;
    height: 30px;
    border-radius: var(--radius-sm);
    object-fit: cover;
}

.footer-desc {
    font-size: 13px;
    margin-bottom: 20px;
    opacity: 0.45;
}

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

.footer-links a {
    color: var(--color-text-light);
    text-decoration: none;
    font-size: 13px;
    opacity: 0.5;
    transition: opacity var(--transition-fast);
}

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

.footer-links span {
    opacity: 0.15;
    font-size: 12px;
}

.footer-copyright {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.footer-copyright p {
    font-size: 12px;
    margin-bottom: 4px;
    opacity: 0.35;
}

.footer-copyright a {
    color: var(--color-accent);
    text-decoration: none;
    opacity: 0.6;
    transition: opacity var(--transition-fast);
}

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

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

@media (max-width: 960px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .hero-content,
    .company-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 40px;
    }

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

    .hero-desc {
        margin: 0 auto 28px;
    }

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

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

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

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

    .company-info h3 {
        font-size: 24px;
    }
}

@media (max-width: 768px) {
    .nav-cta {
        display: none;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 62px;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 16px 24px;
        border-bottom: 1px solid rgba(0, 0, 0, 0.05);
        box-shadow: var(--shadow-md);
    }

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

    .nav-links a {
        padding: 12px 0;
        font-size: 15px;
        border-bottom: 1px solid rgba(0, 0, 0, 0.04);
    }

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

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

    .hero-section {
        padding-top: 110px;
        padding-bottom: 60px;
    }

    .hero-section::before {
        height: 100%;
        clip-path: none;
    }

    .hero-text h1 {
        font-size: 34px;
        letter-spacing: 1px;
    }

    .hero-meta {
        flex-direction: column;
        gap: 10px;
        align-items: center;
    }

    .hero-image img {
        max-width: 240px;
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .feature-card {
        padding: 32px 24px;
    }

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

    .company-info h3 {
        font-size: 24px;
    }

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

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

    .btn {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }

    .main-footer {
        padding: 36px 0 20px;
    }
}

@media (max-width: 480px) {
    .hero-section {
        padding-top: 90px;
        padding-bottom: 40px;
    }

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

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

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

    .company-features {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
    }

    .company-visual {
        gap: 10px;
    }

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

    .visual-card i {
        font-size: 26px;
    }

    .btn {
        padding: 13px 28px;
        font-size: 14px;
    }
}