/* ========================================
   印飞网络 - 大型软件定制开发
   清淡艺术风格样式表
   ======================================== */

/* 变量定义 - 清淡艺术风格 */
:root {
    --primary: #4a7c59;
    --primary-light: #6b9b7a;
    --primary-dark: #3a6347;
    --secondary: #f5f0e8;
    --secondary-dark: #e8e0d4;
    --accent: #c4a77d;
    --accent-light: #d4bc9a;
    --dark: #2c3e33;
    --dark-light: #3d4f44;
    --light: #fefefe;
    --light-warm: #faf8f5;
    --gray: #6b7280;
    --gray-light: #9ca3af;
    --border: #e5e0d8;
    --gradient-primary: linear-gradient(135deg, #4a7c59 0%, #6b9b7a 100%);
    --gradient-accent: linear-gradient(135deg, #c4a77d 0%, #d4bc9a 100%);
    --gradient-hero: linear-gradient(135deg, #f5f0e8 0%, #e8e0d4 50%, #f0ebe3 100%);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 30px rgba(74, 124, 89, 0.15);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-full: 9999px;
}

/* 重置样式 */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif; background: var(--light-warm); color: var(--dark); line-height: 1.6; overflow-x: hidden; }
a { text-decoration: none; color: inherit; transition: var(--transition); }
ul { list-style: none; }
.container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }

/* 按钮 */
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 14px 32px; font-size: 15px; font-weight: 500; border-radius: var(--radius-full); cursor: pointer; transition: var(--transition); border: none; outline: none; }
.btn-primary { background: var(--gradient-primary); color: var(--light); box-shadow: 0 4px 16px rgba(74, 124, 89, 0.25); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 24px rgba(74, 124, 89, 0.35); }
.btn-outline { background: transparent; color: var(--dark); border: 1.5px solid var(--border); }
.btn-outline:hover { background: var(--secondary); border-color: var(--primary); }
.btn-full { width: 100%; }

/* 导航栏 */
.navbar { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; padding: 20px 0; transition: var(--transition); background: transparent; }
.navbar.scrolled { padding: 12px 0; background: rgba(254, 254, 254, 0.9); backdrop-filter: blur(20px); border-bottom: 1px solid var(--border); }
.navbar .container { display: flex; align-items: center; justify-content: space-between; }
.logo { display: flex; align-items: center; gap: 10px; font-size: 22px; font-weight: 700; }
.logo-icon { width: 36px; height: 36px; display: flex; align-items: center; justify-content: center; background: var(--gradient-primary); color: var(--light); border-radius: var(--radius-sm); font-size: 18px; }
.logo-text { color: var(--dark); }
.nav-links { display: flex; align-items: center; gap: 8px; }
.nav-links a { padding: 10px 18px; font-size: 15px; color: var(--gray); border-radius: var(--radius-full); transition: var(--transition); }
.nav-links a:hover, .nav-links a.active { color: var(--primary); background: rgba(74, 124, 89, 0.08); }
.nav-links .nav-cta { background: var(--gradient-primary); color: var(--light); font-weight: 500; margin-left: 8px; }
.nav-links .nav-cta:hover { background: var(--gradient-primary); transform: translateY(-1px); }
.mobile-menu-btn { display: none; flex-direction: column; gap: 5px; padding: 8px; background: none; border: none; cursor: pointer; }
.mobile-menu-btn span { width: 24px; height: 2px; background: var(--dark); }

/* 英雄区 - 艺术风格 */
.hero { min-height: 100vh; display: flex; align-items: center; position: relative; padding: 100px 0 60px; overflow: hidden; background: var(--gradient-hero); }
.hero-bg { position: absolute; inset: 0; z-index: 0; }
.gradient-orb { position: absolute; border-radius: 50%; filter: blur(100px); opacity: 0.5; }
.orb-1 { width: 500px; height: 500px; background: rgba(196, 167, 125, 0.4); top: -100px; right: -100px; }
.orb-2 { width: 400px; height: 400px; background: rgba(74, 124, 89, 0.2); bottom: -50px; left: -100px; }
.orb-3 { width: 300px; height: 300px; background: rgba(232, 224, 212, 0.8); top: 40%; left: 60%; }

/* 艺术线条装饰 */
.art-line { position: absolute; background: linear-gradient(90deg, transparent, rgba(74, 124, 89, 0.1), transparent); height: 1px; }
.line-1 { width: 300px; top: 20%; left: 10%; transform: rotate(-15deg); }
.line-2 { width: 200px; top: 60%; right: 15%; transform: rotate(20deg); }
.line-3 { width: 250px; bottom: 30%; left: 20%; transform: rotate(5deg); }

.hero .container { position: relative; z-index: 2; }
.hero-content { max-width: 800px; }
.hero-title { font-size: clamp(40px, 8vw, 72px); font-weight: 900; line-height: 1.1; margin-bottom: 24px; color: var(--dark); }
.title-line { display: block; }
.title-line.highlight { color: var(--primary); }
.hero-subtitle { font-size: clamp(16px, 2.5vw, 20px); color: var(--gray); margin-bottom: 48px; max-width: 600px; line-height: 1.8; }
.hero-stats { display: flex; gap: 48px; margin-bottom: 48px; }
.stat-item { display: flex; flex-direction: column; }
.stat-number { font-size: 48px; font-weight: 900; color: var(--primary); line-height: 1; }
.stat-item span:last-child { font-size: 14px; color: var(--gray); margin-top: 4px; }
.hero-cta { display: flex; gap: 16px; flex-wrap: wrap; }
.scroll-indicator { position: absolute; bottom: 40px; left: 50%; transform: translateX(-50%); z-index: 2; }
.mouse { width: 26px; height: 40px; border: 2px solid var(--gray-light); border-radius: var(--radius-full); display: flex; justify-content: center; padding-top: 8px; }
.wheel { width: 4px; height: 8px; background: var(--primary); border-radius: var(--radius-full); animation: scroll 2s infinite; }
@keyframes scroll { 0% { transform: translateY(0); opacity: 1; } 100% { transform: translateY(12px); opacity: 0; } }

/* 区块标题 */
.section-header { text-align: center; margin-bottom: 64px; }
.section-tag { display: inline-block; font-size: 13px; font-weight: 600; letter-spacing: 2px; text-transform: uppercase; color: var(--primary); margin-bottom: 12px; }
.section-title { font-size: clamp(28px, 5vw, 40px); font-weight: 700; margin-bottom: 16px; color: var(--dark); }
.section-desc { font-size: 17px; color: var(--gray); max-width: 560px; margin: 0 auto; }

/* 服务区块 */
.services { padding: 120px 0; background: var(--light); }
.services-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); gap: 24px; }
.service-card { background: var(--light); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 32px; transition: var(--transition); position: relative; overflow: hidden; }
.service-card::before { content: ''; position: absolute; inset: 0; background: linear-gradient(135deg, rgba(74, 124, 89, 0.03) 0%, transparent 50%); opacity: 0; transition: var(--transition); }
.service-card:hover { transform: translateY(-4px); border-color: rgba(74, 124, 89, 0.2); box-shadow: var(--shadow-lg); }
.service-card:hover::before { opacity: 1; }
.service-card.featured { border-color: rgba(74, 124, 89, 0.3); background: linear-gradient(135deg, var(--light) 0%, rgba(74, 124, 89, 0.02) 100%); }
.card-badge { position: absolute; top: 20px; right: 20px; background: var(--gradient-primary); color: var(--light); font-size: 12px; font-weight: 600; padding: 4px 12px; border-radius: var(--radius-full); }
.card-icon { width: 56px; height: 56px; display: flex; align-items: center; justify-content: center; background: rgba(74, 124, 89, 0.08); border-radius: var(--radius-md); margin-bottom: 24px; color: var(--primary); }
.card-icon svg { width: 28px; height: 28px; }
.service-card h3 { font-size: 20px; font-weight: 600; margin-bottom: 12px; color: var(--dark); }
.service-card > p { color: var(--gray); font-size: 15px; margin-bottom: 20px; line-height: 1.7; }
.feature-list { display: flex; flex-wrap: wrap; gap: 8px; }
.feature-list li { font-size: 13px; color: var(--gray); padding: 6px 12px; background: var(--secondary); border-radius: var(--radius-full); border: 1px solid var(--border); }

/* 解决方案区块 */
.solutions { padding: 120px 0; background: var(--secondary); position: relative; }
.solutions .container { position: relative; z-index: 1; }
.solutions-wrapper { display: flex; flex-direction: column; gap: 80px; }
.solution-item { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.solution-item.reverse { direction: rtl; }
.solution-item.reverse > * { direction: ltr; }
.solution-num { font-size: 14px; font-weight: 700; color: var(--primary); letter-spacing: 2px; display: block; margin-bottom: 16px; }
.solution-content h3 { font-size: 28px; font-weight: 700; margin-bottom: 16px; color: var(--dark); }
.solution-content > p { color: var(--gray); font-size: 16px; line-height: 1.8; margin-bottom: 24px; }
.solution-features { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.solution-features li { display: flex; align-items: center; gap: 10px; font-size: 15px; color: var(--dark); }
.solution-features li::before { content: '◆'; color: var(--primary); font-size: 10px; }
.solution-visual { display: flex; align-items: center; justify-content: center; min-height: 300px; }

/* 艺术可视化 */
.visual-art { position: relative; }
.art-1 { width: 200px; height: 200px; }
.art-1 .art-shape { position: absolute; border-radius: 50%; }
.art-1 .art-shape:nth-child(1) { width: 100%; height: 100%; background: rgba(74, 124, 89, 0.1); }
.art-1 .art-shape:nth-child(2) { width: 70%; height: 70%; background: rgba(74, 124, 89, 0.15); top: 15%; left: 15%; }
.art-1 .art-shape:nth-child(3) { width: 40%; height: 40%; background: var(--gradient-primary); top: 30%; left: 30%; }

.art-2 { width: 200px; height: 200px; }
.art-2 .art-ring { position: absolute; border: 2px solid rgba(196, 167, 125, 0.3); border-radius: 50%; top: 50%; left: 50%; transform: translate(-50%, -50%); }
.art-2 .art-ring:nth-child(1) { width: 100%; height: 100%; }
.art-2 .art-ring:nth-child(2) { width: 60%; height: 60%; border-color: rgba(196, 167, 125, 0.5); }
.art-2 .art-dot { position: absolute; width: 20px; height: 20px; background: var(--accent); border-radius: 50%; top: 50%; left: 50%; transform: translate(-50%, -50%); }

.art-3 { width: 200px; height: 200px; }
.art-3 .art-line-h { position: absolute; width: 100%; height: 2px; background: rgba(74, 124, 89, 0.2); top: 50%; left: 0; }
.art-3 .art-line-v { position: absolute; width: 2px; height: 100%; background: rgba(74, 124, 89, 0.2); left: 50%; top: 0; }
.art-3 .art-box { position: absolute; width: 80px; height: 80px; border: 2px solid var(--primary); top: 50%; left: 50%; transform: translate(-50%, -50%) rotate(45deg); }

/* 数据统计区块 */
.stats-section { padding: 100px 0; background: var(--light); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.stat-card { text-align: center; padding: 40px 24px; background: var(--light); border: 1px solid var(--border); border-radius: var(--radius-lg); transition: var(--transition); }
.stat-card:hover { transform: translateY(-4px); border-color: rgba(74, 124, 89, 0.2); box-shadow: var(--shadow-md); }
.stat-icon { width: 48px; height: 48px; margin: 0 auto 16px; color: var(--primary); }
.stat-icon svg { width: 100%; height: 100%; }
.stat-value { font-size: 42px; font-weight: 900; color: var(--primary); line-height: 1; margin-bottom: 8px; }
.stat-value span { font-size: 20px; font-weight: 500; }
.stat-desc { font-size: 15px; color: var(--gray); }

/* 技术栈区块 */
.tech-stack { padding: 120px 0; background: var(--light-warm); }
.tech-categories { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 24px; }
.tech-category { padding: 28px; background: var(--light); border: 1px solid var(--border); border-radius: var(--radius-lg); transition: var(--transition); }
.tech-category:hover { border-color: rgba(74, 124, 89, 0.2); box-shadow: var(--shadow-md); }
.tech-category h4 { font-size: 17px; font-weight: 600; margin-bottom: 20px; color: var(--primary); }
.tech-items { display: flex; flex-wrap: wrap; gap: 10px; }
.tech-tag { font-size: 14px; padding: 8px 16px; background: var(--secondary); border: 1px solid var(--border); border-radius: var(--radius-full); color: var(--dark); transition: var(--transition); }
.tech-tag:hover { background: rgba(74, 124, 89, 0.1); border-color: rgba(74, 124, 89, 0.3); color: var(--primary); }

/* 关于区块 */
.about { padding: 120px 0; background: var(--light); }
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; }
.about-content .section-tag, .about-content .section-title { text-align: left; }
.about-content > p { color: var(--gray); font-size: 16px; line-height: 1.9; margin-bottom: 20px; }
.about-values { display: flex; flex-direction: column; gap: 24px; margin-top: 40px; }
.value-item { display: flex; gap: 20px; align-items: flex-start; }
.value-num { font-size: 13px; font-weight: 700; color: var(--primary); padding: 6px 12px; background: rgba(74, 124, 89, 0.1); border-radius: var(--radius-sm); flex-shrink: 0; }
.value-text h4 { font-size: 17px; font-weight: 600; margin-bottom: 6px; color: var(--dark); }
.value-text p { color: var(--gray); font-size: 14px; }
.about-visual { display: flex; justify-content: center; }
.about-card { background: var(--light); border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden; width: 100%; max-width: 400px; box-shadow: var(--shadow-lg); }
.card-header { display: flex; gap: 8px; padding: 16px; background: var(--secondary); border-bottom: 1px solid var(--border); }
.card-header .dot { width: 12px; height: 12px; border-radius: 50%; background: var(--primary); }
.card-header .dot:nth-child(2) { background: var(--accent); }
.card-header .dot:nth-child(3) { background: var(--gray-light); }
.card-body { padding: 24px; font-family: 'Consolas', 'Monaco', monospace; font-size: 14px; line-height: 2; }
.code-line { color: var(--gray); }
.code-line.indent { padding-left: 20px; }
.code-keyword { color: var(--primary); }
.code-var { color: var(--accent); }
.code-string { color: #059669; }
.code-number { color: var(--primary-dark); }

/* 联系区块 */
.contact { padding: 120px 0; background: var(--secondary); }
.contact-wrapper { display: grid; grid-template-columns: 1fr 1.2fr; gap: 80px; }
.contact-info .section-tag, .contact-info .section-title { text-align: left; }
.contact-info > p { color: var(--gray); font-size: 16px; line-height: 1.8; margin-bottom: 40px; }
.contact-details { display: flex; flex-direction: column; gap: 24px; }
.contact-item { display: flex; align-items: flex-start; gap: 16px; }
.contact-icon { width: 48px; height: 48px; display: flex; align-items: center; justify-content: center; background: rgba(74, 124, 89, 0.1); border-radius: var(--radius-md); font-size: 20px; color: var(--primary); flex-shrink: 0; }
.contact-label { display: block; font-size: 13px; color: var(--gray); margin-bottom: 4px; }
.contact-value { font-size: 16px; font-weight: 500; color: var(--dark); }
.contact-form-wrapper { background: var(--light); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 40px; box-shadow: var(--shadow-md); }
.contact-form { display: flex; flex-direction: column; gap: 20px; }
.form-group { position: relative; }
.form-group input, .form-group select, .form-group textarea { width: 100%; padding: 16px; background: var(--light-warm); border: 1px solid var(--border); border-radius: var(--radius-md); color: var(--dark); font-size: 15px; font-family: inherit; transition: var(--transition); outline: none; }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { border-color: var(--primary); background: var(--light); }
.form-group label { position: absolute; left: 16px; top: 50%; transform: translateY(-50%); color: var(--gray); font-size: 15px; transition: var(--transition); pointer-events: none; }
.form-group textarea ~ label { top: 24px; transform: none; }
.form-group input:focus ~ label, .form-group input:not(:placeholder-shown) ~ label, .form-group textarea:focus ~ label, .form-group textarea:not(:placeholder-shown) ~ label { top: -8px; left: 12px; transform: none; font-size: 12px; color: var(--primary); background: var(--light); padding: 0 4px; }
.form-group select { appearance: none; cursor: pointer; }
.form-group select:invalid { color: var(--gray); }
.select-label { position: absolute; left: 16px; top: -8px; font-size: 12px; color: var(--primary); background: var(--light); padding: 0 4px; }

/* 页脚 */
.footer { padding: 80px 0 40px; background: var(--dark); color: var(--light); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px; margin-bottom: 64px; }
.footer-logo { display: flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 700; margin-bottom: 20px; }
.footer-logo .logo-icon { background: var(--gradient-primary); }
.footer-logo .logo-text { color: var(--light); }
.footer-brand > p { color: var(--gray-light); font-size: 15px; line-height: 1.8; margin-bottom: 24px; }
.footer-social { display: flex; gap: 12px; }
.social-link { width: 40px; height: 40px; display: flex; align-items: center; justify-content: center; background: rgba(255, 255, 255, 0.05); border: 1px solid rgba(255, 255, 255, 0.1); border-radius: var(--radius-full); font-size: 13px; font-weight: 600; color: var(--light); transition: var(--transition); }
.social-link:hover { background: rgba(74, 124, 89, 0.2); border-color: var(--primary); color: var(--light); }
.footer-links h4 { font-size: 16px; font-weight: 600; margin-bottom: 20px; color: var(--light); }
.footer-links li { margin-bottom: 12px; }
.footer-links a { font-size: 15px; color: var(--gray-light); transition: var(--transition); }
.footer-links a:hover { color: var(--primary); padding-left: 4px; }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; padding-top: 40px; border-top: 1px solid rgba(255, 255, 255, 0.1); }
.footer-bottom p { font-size: 14px; color: var(--gray-light); }

/* 响应式 */
@media (max-width: 1024px) {
    .about-grid, .contact-wrapper { grid-template-columns: 1fr; gap: 48px; }
    .solution-item { grid-template-columns: 1fr; gap: 40px; }
    .solution-item.reverse { direction: ltr; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .nav-links { display: none; position: absolute; top: 100%; left: 0; right: 0; background: var(--light); flex-direction: column; padding: 20px; box-shadow: var(--shadow-lg); }
    .nav-links.active { display: flex; }
    .mobile-menu-btn { display: flex; }
    .hero-stats { flex-wrap: wrap; gap: 24px; }
    .stat-number { font-size: 36px; }
    .stats-grid { grid-template-columns: 1fr; }
    .services-grid, .tech-categories { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .footer-bottom { flex-direction: column; gap: 16px; text-align: center; }
}