/* style.css */
:root {
    --primary: #0A66C2;
    --primary-dark: #084B8A;
    --primary-light: #E8F4FD;
    --accent: #00A3A3;
    --text: #1E293B;
    --text-light: #64748B;
    --bg: #FFFFFF;
    --bg-light: #F8FAFC;
    --border: #E2E8F0;
    --shadow: 0 4px 20px rgba(0,0,0,0.06);
    --radius: 12px;
    --transition: 0.25s ease;
}

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

body {
    font-family: 'Noto Sans SC', 'Inter', sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
}

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }
.bg-light { background: var(--bg-light); }
.section-title { font-size: 2rem; font-weight: 700; margin-bottom: 32px; color: var(--text); text-align: center; }

/* 按钮 */
.btn {
    display: inline-block; padding: 12px 28px; border-radius: 30px; font-weight: 600;
    text-decoration: none; transition: var(--transition); cursor: pointer; border: 2px solid transparent;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 25px rgba(10,102,194,0.25); }
.btn-outline { border-color: var(--primary); color: var(--primary); background: transparent; }
.btn-outline:hover { background: var(--primary); color: #fff; }
.btn-secondary { background: transparent; border-color: var(--text); color: var(--text); }
.btn-secondary:hover { background: var(--text); color: #fff; }

/* 导航 */
.site-header {
    background: rgba(255,255,255,0.95); backdrop-filter: blur(8px); position: sticky; top: 0;
    z-index: 100; border-bottom: 1px solid var(--border);
}
.nav-container { display: flex; align-items: center; justify-content: space-between; height: 70px; }
.logo { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--text); font-weight: 700; font-size: 1.3rem; }
.logo-image { margin-left: 10px;width: 120px; height: 60px; object-fit: contain; display: block; }
.logo i { font-size: 1.6rem; }
.main-nav ul { list-style: none; display: flex; gap: 32px; }
.main-nav a {
    text-decoration: none; color: var(--text); font-weight: 500; position: relative;
    padding: 4px 0; transition: color var(--transition);
}
.main-nav a:hover, .main-nav a.active { color: var(--primary); }
.main-nav a.active::after {
    content: ''; position: absolute; bottom: -4px; left: 0; width: 100%; height: 2px;
    background: var(--primary); border-radius: 2px;
}

/* 汉堡菜单 */
.hamburger { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 4px; }
.hamburger span { display: block; width: 24px; height: 2px; background: var(--text); border-radius: 2px; transition: var(--transition); }
.hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Hero */
.hero {
    background: linear-gradient(135deg, #E8F4FD 0%, #D1ECFC 100%);
    padding: 100px 0 80px; text-align: center;
}
.hero-content h1 { font-size: 2.8rem; font-weight: 700; color: var(--text); margin-bottom: 12px; }
.hero-sub { font-size: 1.1rem; color: var(--text-light); margin-bottom: 16px; }
.hero-slogan { font-size: 1.4rem; font-weight: 500; color: var(--primary-dark); margin-bottom: 12px; }
.hero-contact { margin-bottom: 32px; color: var(--text-light); }
.hero-contact a { color: var(--primary); text-decoration: none; font-weight: 600; }
.hero-contact a:hover { text-decoration: underline; }
.hero-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* 亮点卡片 */
.highlights .container { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 32px; }
.highlight-card {
    background: #fff; padding: 32px 24px; border-radius: var(--radius); text-align: center;
    box-shadow: var(--shadow); transition: transform var(--transition);
}
.highlight-card:hover { transform: translateY(-6px); }
.highlight-card i { font-size: 2.4rem; color: var(--primary); margin-bottom: 16px; }
.highlight-card h3 { font-size: 1.3rem; margin-bottom: 8px; }

/* 卡片网格 */
.card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 28px; }
.service-card, .case-card {
    background: #fff; border-radius: var(--radius); padding: 28px; box-shadow: var(--shadow);
    transition: transform var(--transition), box-shadow var(--transition);
}
.service-card:hover, .case-card:hover { transform: translateY(-4px); box-shadow: 0 12px 30px rgba(0,0,0,0.1); }
.service-card i { font-size: 2rem; color: var(--accent); margin-bottom: 12px; }
.case-card .case-tag {
    display: inline-block; background: var(--primary-light); color: var(--primary-dark);
    padding: 4px 12px; border-radius: 20px; font-size: 0.8rem; font-weight: 600; margin-bottom: 8px;
}
.card-link { display: inline-flex; align-items: center; gap: 6px; margin-top: 12px; color: var(--primary); font-weight: 600; text-decoration: none; }
.card-link:hover { text-decoration: underline; }

/* 文化区 */
.culture-content { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.culture-list { list-style: none; margin: 20px 0; }
.culture-list li { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.culture-list i { color: var(--accent); }
.image-placeholder {
    background: var(--bg-light); border-radius: var(--radius); height: 280px;
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    color: var(--text-light); border: 2px dashed var(--border);
}
.image-placeholder i { font-size: 2.5rem; margin-bottom: 8px; }

/* 页面英雄区 */
.page-hero {
    background: linear-gradient(135deg, #E8F4FD, #D1ECFC); padding: 60px 0; text-align: center;
}
.page-hero h1 { font-size: 2.4rem; font-weight: 700; }
.page-hero p { color: var(--text-light); margin-top: 8px; }

/* 关于页 */
.about-story p { margin-bottom: 16px; font-size: 1.05rem; }
.team-highlight ul { margin-top: 16px; padding-left: 24px; }
.team-highlight li { margin-bottom: 10px; }
.values-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 32px; margin-top: 24px; }
.value-item { text-align: center; padding: 24px; }
.value-item i { font-size: 2.2rem; color: var(--primary); margin-bottom: 12px; }

/* 服务详情 */
.services-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 32px; }
.service-detail-card {
    background: #fff; padding: 32px; border-radius: var(--radius); box-shadow: var(--shadow);
    transition: var(--transition);
}
.service-detail-card:hover { box-shadow: 0 12px 28px rgba(0,0,0,0.1); }
.service-icon { font-size: 2.2rem; color: var(--accent); margin-bottom: 12px; }
.service-detail-card ul { margin-top: 12px; padding-left: 20px; }
.service-note { text-align: center; margin-top: 48px; padding: 24px; background: var(--primary-light); border-radius: var(--radius); }
.service-note i { margin-right: 6px; }

/* 案例列表 */
.case-list { display: flex; flex-direction: column; gap: 40px; }
.case-detail { background: #fff; padding: 32px; border-radius: var(--radius); box-shadow: var(--shadow); }
.case-header { display: flex; align-items: center; gap: 16px; margin-bottom: 16px; flex-wrap: wrap; }
.case-tag { background: var(--primary-light); color: var(--primary-dark); padding: 4px 16px; border-radius: 20px; font-weight: 600; }
.case-body div { margin-bottom: 12px; }

/* 技术优势 */
.tech-icons { display: flex; flex-wrap: wrap; gap: 20px; justify-content: center; margin-top: 24px; }
.tech-icons span {
    background: #fff; padding: 12px 24px; border-radius: 30px; box-shadow: var(--shadow);
    font-weight: 500; display: inline-flex; align-items: center; gap: 8px;
}
.tech-icons i { color: var(--primary); }
.tech-principles { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 32px; margin-top: 24px; }
.principle { text-align: center; padding: 20px; }
.principle i { font-size: 2rem; color: var(--accent); margin-bottom: 12px; }
.team-experience p { margin-bottom: 16px; }

/* 联系页 */
.contact-layout { display: grid; grid-template-columns: 1fr 1.2fr; gap: 48px; }
.contact-info p { margin-bottom: 16px; display: flex; align-items: center; gap: 10px; }
.contact-info i { width: 24px; color: var(--primary); }
.map-placeholder {
    background: var(--bg-light); border-radius: var(--radius); height: 200px;
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    border: 2px dashed var(--border); margin-top: 24px; color: var(--text-light);
}
.map-placeholder i { font-size: 2rem; margin-bottom: 8px; }
.contact-form { background: #fff; padding: 32px; border-radius: var(--radius); box-shadow: var(--shadow); }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; margin-bottom: 6px; font-weight: 500; }
.form-group input, .form-group textarea {
    width: 100%; padding: 12px 16px; border: 1px solid var(--border); border-radius: 8px;
    font-family: inherit; font-size: 1rem; transition: border var(--transition);
}
.form-group input:focus, .form-group textarea:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(10,102,194,0.1); }
.form-note { margin-top: 16px; color: var(--text-light); }

/* 页脚 */
.site-footer { background: #1E293B; color: #CBD5E1; padding: 48px 0 24px; }
.footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 32px; margin-bottom: 32px; }
.footer-about h4 { font-size: 1.2rem; color: #fff; margin-bottom: 8px; }
.footer-links h5, .footer-contact h5 { color: #fff; margin-bottom: 12px; }
.footer-links ul { list-style: none; }
.footer-links a { color: #CBD5E1; text-decoration: none; line-height: 2; }
.footer-links a:hover { color: #fff; }
.footer-contact p { margin-bottom: 8px; display: flex; align-items: center; gap: 8px; }
.footer-contact a { color: #CBD5E1; text-decoration: none; }
.footer-contact a:hover { color: #fff; text-decoration: underline; }
.footer-bottom a { color: inherit; text-decoration: none; }
.footer-bottom a:hover { text-decoration: underline; }
.footer-bottom { border-top: 1px solid #334155; padding-top: 20px; text-align: center; font-size: 0.9rem; color: #94A3B8; }

/* 响应式 */
@media (max-width: 768px) {
    .main-nav { position: fixed; top: 70px; left: 0; width: 100%; background: #fff; border-bottom: 1px solid var(--border); transform: translateY(-100%); opacity: 0; transition: transform 0.3s ease, opacity 0.3s ease; }
    .main-nav.open { transform: translateY(0); opacity: 1; }
    .main-nav ul { flex-direction: column; padding: 20px; gap: 16px; }
    .hamburger { display: flex; }
    .hero-content h1 { font-size: 2rem; }
    .culture-content { grid-template-columns: 1fr; }
    .contact-layout { grid-template-columns: 1fr; }
    .section { padding: 48px 0; }
}