/* =====================================================
   鸿萃科技 - 工业科技风格设计系统
   Industrial Tech Design System
   ===================================================== */

/* 字体定义 */
@font-face {
    font-family: 'Display';
    src: local('Orbitron'), local('Rajdhani');
}

@font-face {
    font-family: 'Tech';
    src: local('Rajdhani'), local('Orbitron');
}

/* 基础变量 - 工业科技配色 */
:root {
    /* 主色调：深色科技感 */
    --dark-900: #0a0e17;
    --dark-800: #111827;
    --dark-700: #1a2332;
    --dark-600: #243044;

    /* 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;

    /* 金属质感 */
    --metal-light: #e8ecf0;
    --metal-mid: #c4c9d1;
    --metal-dark: #8a919d;

    /* 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%);
}

/* 全局样式 */
html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--dark-900);
    color: var(--gray-300);
    line-height: 1.6;
}

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

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

/* 背景纹理 */
.bg-dark-900 { background-color: var(--dark-900); }
.bg-dark-800 { background-color: var(--dark-800); }
.bg-dark-700 { background-color: var(--dark-700); }

.text-accent-cyan { color: var(--accent-cyan); }
.text-accent-orange { color: var(--accent-orange); }

/* =====================================================
   Hero 主视觉区域
   ===================================================== */
.hero {
    min-height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--dark-900);
    padding: 4rem 1rem;
}

/* Hero 内容 */
.hero-content {
    position: relative;
    z-index: 10;
    max-width: 900px;
    margin: 0 auto;
    padding: 4rem 2rem;
    text-align: center;
}

/* 标题样式 */
.hero-title {
    font-family: 'Orbitron', sans-serif;
    font-size: clamp(2rem, 6vw, 4rem);
    font-weight: 700;
    line-height: 1.2;
    color: white;
    margin-bottom: 1.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    text-shadow: 0 0 40px rgba(0, 212, 255, 0.3);
}

/* 标题高亮 */
.hero-title .highlight {
    background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-orange) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* 副标题 */
.hero-subtitle {
    font-family: 'Rajdhani', sans-serif;
    font-size: clamp(1rem, 2.5vw, 1.4rem);
    color: var(--gray-400);
    max-width: 700px;
    margin: 0 auto 3rem;
    line-height: 1.8;
    letter-spacing: 0.1em;
}

/* CTA 按钮组 */
.hero-buttons {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 4rem;
}

/* 工业风格按钮 */
.btn-industrial {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 2rem;
    font-family: 'Rajdhani', sans-serif;
    font-size: 1rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    border: none;
    cursor: pointer;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.btn-primary::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, white 0%, var(--accent-cyan-light) 100%);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 40px rgba(0, 212, 255, 0.4);
}

.btn-primary:hover::before {
    opacity: 1;
}

.btn-primary span {
    position: relative;
    z-index: 1;
}

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

.btn-secondary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: left 0.5s ease;
}

.btn-secondary:hover {
    border-color: var(--accent-cyan);
    box-shadow: 0 0 30px rgba(0, 212, 255, 0.2), inset 0 0 30px rgba(0, 212, 255, 0.05);
}

.btn-secondary:hover::before {
    left: 100%;
}

.btn-secondary span {
    position: relative;
    z-index: 1;
}

/* 装饰角标 */
.btn-industrial::after {
    content: '';
    position: absolute;
    width: 8px;
    height: 8px;
    border: 1px solid currentColor;
    opacity: 0.5;
    transition: all 0.3s ease;
}

.btn-primary::after {
    border-color: var(--dark-900);
}

.btn-secondary::after {
    border-color: white;
}

.btn-industrial:hover::after {
    width: 100%;
    height: 100%;
    opacity: 0.1;
}

/* 统计数据区 */
.hero-stats {
    display: flex;
    justify-content: center;
    gap: 4rem;
    flex-wrap: wrap;
    padding-top: 3rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.stat-item {
    text-align: center;
}

.stat-value {
    font-family: 'Orbitron', sans-serif;
    font-size: 2.5rem;
    font-weight: 700;
    color: white;
    line-height: 1;
    margin-bottom: 0.5rem;
}

.stat-value .unit {
    font-size: 1.5rem;
    color: var(--accent-cyan);
}

.stat-label {
    font-family: 'Rajdhani', sans-serif;
    font-size: 0.9rem;
    color: var(--gray-500);
    text-transform: uppercase;
    letter-spacing: 0.2em;
}

/* =====================================================
   通用区块样式
   ===================================================== */
.section {
    position: relative;
    padding: 6rem 0;
    overflow: hidden;
}

.section-dark {
    background: var(--dark-800);
}

.section-darker {
    background: var(--dark-900);
}

/* 装饰分割线 */
.section-divider {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 4rem;
}

.section-divider::before,
.section-divider::after {
    content: '';
    height: 1px;
    flex: 1;
    max-width: 200px;
    background: linear-gradient(90deg, transparent, var(--accent-cyan), transparent);
}

.section-divider .icon {
    color: var(--accent-cyan);
    font-size: 1.2rem;
}

/* 区块标题 */
.section-title {
    font-family: 'Orbitron', sans-serif;
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    font-weight: 700;
    color: white;
    text-align: center;
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.section-subtitle {
    font-family: 'Rajdhani', sans-serif;
    font-size: 1.1rem;
    color: var(--gray-400);
    text-align: center;
    max-width: 600px;
    margin: 0 auto 3rem;
    line-height: 1.8;
}

/* =====================================================
   卡片组件
   ===================================================== */
.card-industrial {
    position: relative;
    background: var(--dark-700);
    border: 1px solid rgba(255, 255, 255, 0.05);
    padding: 2rem;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.card-industrial::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-cyan), var(--accent-orange));
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

.card-industrial:hover {
    transform: translateY(-8px);
    border-color: rgba(0, 212, 255, 0.3);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

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

/* 卡片图标容器 */
.card-icon {
    position: relative;
    width: 70px;
    height: 70px;
    margin: 0 auto 1.5rem;
    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);
}

.card-icon::before {
    content: '';
    position: absolute;
    inset: -1px;
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-orange));
    z-index: -1;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.card-industrial:hover .card-icon::before {
    opacity: 1;
}

.card-icon i {
    font-size: 1.8rem;
    color: var(--accent-cyan);
    transition: color 0.4s ease;
}

.card-industrial:hover .card-icon i {
    color: white;
}

/* 卡片标题 */
.card-title {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.2rem;
    font-weight: 600;
    color: white;
    text-align: center;
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* 卡片内容 */
.card-content {
    color: var(--gray-400);
    text-align: center;
    line-height: 1.8;
}

/* =====================================================
   网格布局
   ===================================================== */
.grid-industrial {
    display: grid;
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* =====================================================
   进度条 / 加载动画
   ===================================================== */
.progress-bar {
    position: relative;
    height: 4px;
    background: var(--dark-600);
    overflow: hidden;
}

.progress-bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    background: linear-gradient(90deg, var(--accent-cyan), var(--accent-orange));
    animation: progress 2s ease-in-out infinite;
}

@keyframes progress {
    0% { left: -100%; width: 100%; }
    50% { left: 0; width: 100%; }
    100% { left: 100%; width: 0%; }
}

/* =====================================================
   动画效果
   ===================================================== */
.fade-in {
    animation: fadeIn 0.8s ease-out forwards;
    opacity: 0;
}

.fade-in-up {
    animation: fadeInUp 0.8s ease-out forwards;
    opacity: 0;
}

.fade-in-down {
    animation: fadeInDown 0.8s ease-out forwards;
    opacity: 0;
}

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

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

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

/* 延迟动画 */
.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }
.delay-5 { animation-delay: 0.5s; }

/* =====================================================
   响应式设计
   ===================================================== */
@media (max-width: 1024px) {
    .hero-stats {
        gap: 2rem;
    }

    .stat-value {
        font-size: 2rem;
    }
}

@media (max-width: 768px) {
    .section {
        padding: 4rem 0;
    }

    .hero-content {
        padding: 3rem 1rem;
    }

    .hero-buttons {
        gap: 1rem;
    }

    .btn-industrial {
        padding: 0.875rem 1.5rem;
        font-size: 0.9rem;
    }

    .hero-stats {
        gap: 2rem;
        padding-top: 2rem;
    }

    .stat-value {
        font-size: 1.8rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        letter-spacing: 0.02em;
    }

    .hero-subtitle {
        letter-spacing: 0.05em;
    }

    .card-industrial {
        padding: 1.5rem;
    }
}

/* =====================================================
   滚动动画触发器
   ===================================================== */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.animate-on-scroll.animated {
    opacity: 1;
    transform: translateY(0);
}

/* =====================================================
   特殊效果
   ===================================================== */

/* 扫描线效果 */
.scan-line {
    position: relative;
    overflow: hidden;
}

.scan-line::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 50%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.05),
        transparent
    );
    animation: scan 3s linear infinite;
}

@keyframes scan {
    from { left: -100%; }
    to { left: 200%; }
}

/* 科技边框 */
.tech-border {
    position: relative;
    padding: 2rem;
    background: var(--dark-700);
}

.tech-border::before {
    content: '';
    position: absolute;
    inset: 0;
    padding: 2px;
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-orange));
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
}

/* 玻璃效果 */
.glass {
    background: rgba(26, 35, 50, 0.7);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* 发光文字 */
.glow-text {
    text-shadow: 0 0 20px currentColor;
}

.glow-cyan {
    color: var(--accent-cyan);
    text-shadow: 0 0 20px var(--accent-cyan);
}