/* =====================================================
   鸿萃科技 - 工业科技风格通用样式
   Industrial Tech Common Styles
   ===================================================== */

/* =====================================================
   颜色变量
   ===================================================== */
:root {
    /* 主色调：深色科技感 */
    --dark-900: #0a0e17;
    --dark-800: #111827;
    --dark-700: #1a2332;
    --dark-600: #243044;
    --dark-500: #2d3a4f;

    /* 强调色：青色科技蓝 */
    --accent-cyan: #00d4ff;
    --accent-cyan-light: #33e0ff;
    --accent-cyan-dark: #00a8cc;

    /* 辅助色：工程橙 */
    --accent-orange: #ff6b35;
    --accent-orange-light: #ff8c5a;

    /* 中性色 */
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;

    /* 语义化颜色 */
    --text-primary: #ffffff;
    --text-secondary: #d1d5db;
    --text-muted: #9ca3af;

    /* 渐变 */
    --gradient-primary: linear-gradient(135deg, var(--accent-cyan) 0%, #0066ff 100%);
    --gradient-secondary: linear-gradient(135deg, var(--accent-orange) 0%, #ff3366 100%);
    --gradient-dark: linear-gradient(180deg, var(--dark-800) 0%, var(--dark-900) 100%);
}

/* =====================================================
   基础重置
   ===================================================== */
*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    margin: 0;
    padding: 0;
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--dark-900);
    color: var(--gray-300);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Orbitron', 'Rajdhani', sans-serif;
    margin-top: 0;
    line-height: 1.3;
    color: var(--text-primary);
}

p {
    margin-top: 0;
    line-height: 1.8;
}

a {
    color: var(--accent-cyan);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--accent-cyan-light);
}

img {
    max-width: 100%;
    height: auto;
}

/* =====================================================
   字体类
   ===================================================== */
.font-display {
    font-family: 'Orbitron', 'Rajdhani', sans-serif;
}

.font-tech {
    font-family: 'Rajdhani', 'Orbitron', sans-serif;
    letter-spacing: 0.05em;
}

/* =====================================================
   导航栏样式
   ===================================================== */
nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 14, 23, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

nav .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
    height: 80px;
}

/* Logo容器 */
.logo-container {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo-container img {
    height: 48px;
    width: auto;
}

.logo-container span {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.25rem;
    font-weight: 700;
    color: white;
    letter-spacing: 0.05em;
}

/* 导航菜单 */
nav .space-x-6 {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

nav a.nav-link {
    color: var(--gray-300) !important;
    font-family: 'Rajdhani', sans-serif;
    font-size: 0.95rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding: 0.5rem 0;
    position: relative;
    transition: all 0.3s ease;
}

nav a.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-cyan), var(--accent-orange));
    transition: width 0.3s ease;
}

nav a.nav-link:hover {
    color: white !important;
}

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

/* =====================================================
   语言切换器样式
   ===================================================== */
.language-toggle {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 0.5rem 0.75rem;
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
}

.language-toggle:hover {
    background: rgba(0, 212, 255, 0.1);
    border-color: var(--accent-cyan);
}

.language-toggle img {
    width: 20px;
    height: 15px;
    border-radius: 2px;
    object-fit: cover;
}

.language-toggle span {
    font-family: 'Rajdhani', sans-serif;
    font-size: 0.85rem;
    color: white;
    text-transform: uppercase;
}

.language-menu {
    background: var(--dark-800);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    min-width: 120px;
}

.language-menu a {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    color: var(--gray-300);
    transition: all 0.3s ease;
}

.language-menu a:hover {
    background: rgba(0, 212, 255, 0.1);
    color: var(--accent-cyan);
}

.language-menu img {
    width: 20px;
    height: 15px;
    border-radius: 2px;
    object-fit: cover;
}

/* =====================================================
   移动端菜单
   ===================================================== */
.menu-button {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu {
    display: none;
    background: var(--dark-900);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.mobile-menu.active {
    display: block;
}

.mobile-menu a {
    display: block;
    padding: 1rem 1.5rem;
    color: var(--gray-300);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    font-family: 'Rajdhani', sans-serif;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.mobile-menu a:hover {
    background: rgba(0, 212, 255, 0.1);
    color: var(--accent-cyan);
}

/* =====================================================
   响应式导航
   ===================================================== */
@media (max-width: 1024px) {
    nav .hidden.lg\:flex {
        display: none !important;
    }

    .menu-button {
        display: block;
    }
}

@media (max-width: 768px) {
    nav .container {
        height: 70px;
    }

    .logo-container img {
        height: 40px;
    }

    .logo-container span {
        font-size: 1rem;
    }
}

/* =====================================================
   页面内容区域
   ===================================================== */
main {
    min-height: calc(100vh - 200px);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* =====================================================
   按钮样式
   ===================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 1.75rem;
    font-family: 'Rajdhani', sans-serif;
    font-size: 1rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-cyan-dark) 100%);
    color: var(--dark-900);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 212, 255, 0.3);
    color: var(--dark-900);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
    border-color: var(--accent-cyan);
    background: rgba(0, 212, 255, 0.1);
    color: var(--accent-cyan);
}

.btn-outline {
    background: transparent;
    color: var(--accent-cyan);
    border: 1px solid var(--accent-cyan);
}

.btn-outline:hover {
    background: var(--accent-cyan);
    color: var(--dark-900);
}

/* =====================================================
   卡片样式
   ===================================================== */
.card {
    background: var(--dark-700);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    padding: 2rem;
    transition: all 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    border-color: rgba(0, 212, 255, 0.3);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
}

.card-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--dark-600) 0%, var(--dark-800) 100%);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 8px;
    margin-bottom: 1.5rem;
}

.card-icon i {
    font-size: 1.5rem;
    color: var(--accent-cyan);
}

/* =====================================================
   表单样式
   ===================================================== */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-family: 'Rajdhani', sans-serif;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--gray-300);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.875rem 1rem;
    font-family: inherit;
    font-size: 1rem;
    color: white;
    background: var(--dark-700);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--accent-cyan);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--gray-500);
}

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

/* =====================================================
   页脚样式
   ===================================================== */
footer {
    background: var(--dark-800);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 4rem 0 2rem;
}

footer h3 {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.1rem;
    font-weight: 600;
    color: white;
    margin-bottom: 1.5rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

footer p {
    color: var(--gray-400);
    font-size: 0.95rem;
}

footer a {
    color: var(--gray-400);
}

footer a:hover {
    color: var(--accent-cyan);
}

.footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-links li {
    margin-bottom: 0.75rem;
}

.footer-links a {
    font-family: 'Rajdhani', sans-serif;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.footer-bottom {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

.footer-bottom p {
    color: var(--gray-500);
    font-size: 0.85rem;
}

/* =====================================================
   工具类
   ===================================================== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-4 { margin-top: 1rem; }
.mt-8 { margin-top: 2rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-8 { margin-bottom: 2rem; }

.py-8 { padding-top: 2rem; padding-bottom: 2rem; }
.py-16 { padding-top: 4rem; padding-bottom: 4rem; }

.rounded { border-radius: 0.375rem; }
.rounded-lg { border-radius: 0.5rem; }

.shadow { box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1); }
.shadow-lg { box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2); }

/* =====================================================
   动画
   ===================================================== */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fade-in {
    animation: fadeIn 0.5s ease-out;
}

.animate-slide-up {
    animation: slideUp 0.6s ease-out;
}

/* =====================================================
   响应式
   ===================================================== */
@media (max-width: 768px) {
    .container {
        padding: 0 1rem;
    }

    .card {
        padding: 1.5rem;
    }
}