/* ===================================================================
   南昌深策科技有限公司 - 全站公共样式 main.css
   技术栈：原生 CSS3 + Tailwind CDN 辅助
   主色：科技深蓝 #241B70 | 点缀色：亮黄 #FFD000
   =================================================================== */

/* ---------- 1. 全局变量与基础重置 ---------- */
:root {
    --color-primary: #241B70;       /* 科技深蓝 主色 */
    --color-primary-deep: #1a1355;  /* 更深蓝 */
    --color-primary-light: #3a2d9c; /* 浅蓝 */
    --color-accent: #FFD000;        /* 点缀亮黄 */
    --color-white: #ffffff;
    --color-light: #f5f6fa;         /* 浅灰背景 */
    --color-gray: #6b7280;          /* 中灰文字 */
    --color-dark-gray: #374151;     /* 深灰 */
    --color-border: #e5e7eb;
    --shadow-sm: 0 2px 8px rgba(36, 27, 112, 0.08);
    --shadow-md: 0 6px 20px rgba(36, 27, 112, 0.12);
    --shadow-lg: 0 12px 40px rgba(36, 27, 112, 0.18);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --container: 1200px;
}

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

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

body {
    font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    color: var(--color-dark-gray);
    background: var(--color-white);
    line-height: 1.7;
    overflow-x: hidden;
}

a { text-decoration: none; color: inherit; transition: var(--transition); }
img { max-width: 100%; display: block; }
ul, ol { list-style: none; }

.container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 24px;
}

/* ---------- 2. 通用按钮 ---------- */
.btn {
    display: inline-block;
    padding: 14px 36px;
    border-radius: 4px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    letter-spacing: 1px;
}
.btn-primary {
    background: var(--color-accent);
    color: var(--color-primary);
}
.btn-primary:hover {
    background: var(--color-primary);
    color: var(--color-white);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}
.btn-outline {
    background: transparent;
    color: var(--color-white);
    border: 2px solid var(--color-white);
}
.btn-outline:hover {
    background: var(--color-white);
    color: var(--color-primary);
    transform: translateY(-3px);
}

/* ---------- 3. 全局导航栏 ---------- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 18px 0;
    background: rgba(36, 27, 112, 0.15);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: var(--transition);
}
.navbar.scrolled {
    background: var(--color-primary);
    padding: 12px 0;
    box-shadow: var(--shadow-md);
}
.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--color-white);
    font-size: 20px;
    font-weight: 600;
    letter-spacing: 1px;
}
.nav-logo svg { width: 38px; height: 38px; }

.nav-menu {
    display: flex;
    gap: 36px;
}
.nav-menu a {
    color: var(--color-white);
    font-size: 16px;
    font-weight: 400;
    position: relative;
    padding: 6px 0;
}
.nav-menu a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: var(--transition);
}
.nav-menu a:hover::after,
.nav-menu a.active::after { width: 100%; }
.nav-menu a.active { color: var(--color-accent); }
.nav-menu a:hover { color: var(--color-accent); }

/* 汉堡菜单按钮 */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 6px;
}
.nav-toggle span {
    width: 26px;
    height: 2px;
    background: var(--color-white);
    transition: var(--transition);
}
.nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(6px, 6px); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(6px, -6px); }

/* ---------- 4. 全局页脚 ---------- */
.footer {
    background: var(--color-primary-deep);
    color: var(--color-white);
    padding: 60px 0 24px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 40px;
}
.footer-col h4 {
    font-size: 18px;
    margin-bottom: 20px;
    color: var(--color-accent);
    letter-spacing: 1px;
}
.footer-col p, .footer-col li {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.75);
    margin-bottom: 10px;
    line-height: 1.9;
}
.footer-col a:hover { color: var(--color-accent); }
.footer-values {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}
.footer-values span {
    background: rgba(255, 208, 0, 0.12);
    color: var(--color-accent);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 13px;
}
.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 20px;
    text-align: center;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.6);
}
.footer-icp {
    display: inline-block;
    margin-left: 8px;
    padding-left: 8px;
    border-left: 1px solid rgba(255, 255, 255, 0.2);
    color: rgba(255, 255, 255, 0.6);
    transition: var(--transition);
}
.footer-icp:hover {
    color: var(--color-accent);
    border-left-color: var(--color-accent);
}

/* ---------- 5. 通用页面 Banner ---------- */
.page-banner {
    position: relative;
    min-height: 420px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--color-white);
    overflow: hidden;
    margin-top: 0;
}
.page-banner img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 1;
}
.page-banner::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(36, 27, 112, 0.85), rgba(26, 19, 85, 0.75));
    z-index: 2;
}
.page-banner-content {
    position: relative;
    z-index: 3;
    padding: 120px 24px 80px;
}
.page-banner-content h1 {
    font-size: 44px;
    font-weight: 700;
    margin-bottom: 16px;
    letter-spacing: 2px;
}
.page-banner-content p {
    font-size: 18px;
    opacity: 0.9;
    max-width: 700px;
    margin: 0 auto;
}

/* ---------- 6. 通用区块标题 ---------- */
.section { padding: 80px 0; }
.section-gray { background: var(--color-light); }
.section-header {
    text-align: center;
    margin-bottom: 56px;
}
.section-header h2 {
    font-size: 34px;
    color: var(--color-primary);
    font-weight: 700;
    margin-bottom: 14px;
    letter-spacing: 1px;
}
.section-header p {
    color: var(--color-gray);
    font-size: 16px;
    max-width: 640px;
    margin: 0 auto;
}
.section-header .line {
    width: 60px;
    height: 3px;
    background: var(--color-accent);
    margin: 16px auto 0;
}

/* ---------- 7. 卡片通用样式 ---------- */
.card {
    background: var(--color-white);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}
.card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

/* ---------- 8. 滚动渐入动画 ---------- */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}
.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ---------- 9. 响应式适配 ---------- */
@media (max-width: 992px) {
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .section-header h2 { font-size: 28px; }
    .page-banner-content h1 { font-size: 36px; }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 75%;
        max-width: 320px;
        height: 100vh;
        background: var(--color-primary);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 32px;
        transition: right 0.4s ease;
        z-index: 999;
    }
    .nav-menu.open { right: 0; }
    .nav-toggle { display: flex; z-index: 1001; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .section { padding: 56px 0; }
    .section-header h2 { font-size: 26px; }
    .page-banner { min-height: 320px; }
    .page-banner-content { padding: 100px 24px 60px; }
    .page-banner-content h1 { font-size: 28px; }
    .page-banner-content p { font-size: 15px; }
    .btn { padding: 12px 28px; font-size: 14px; }
}

@media (max-width: 480px) {
    .container { padding: 0 16px; }
    .nav-logo { font-size: 16px; }
    .nav-logo svg { width: 32px; height: 32px; }
}