/* ========================================
   临沂广义运营管理有限公司 - 官网样式
   ======================================== */

/* --- 基础重置与变量 --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

:root {
    --primary: #1a56db;
    --primary-dark: #1e40af;
    --primary-light: #dbeafe;
    --accent: #f59e0b;
    --text: #1f2937;
    --text-secondary: #6b7280;
    --bg: #ffffff;
    --bg-gray: #f9fafb;
    --border: #e5e7eb;
    --radius: 12px;
    --shadow: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
    --shadow-lg: 0 10px 40px rgba(0,0,0,.08);
    --max-width: 1200px;
    --nav-height: 72px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
    color: var(--text);
    line-height: 1.7;
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
}

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

/* --- 导航栏 --- */
.header {
    position: fixed; top: 0; left: 0; right: 0; z-index: 100;
    background: rgba(255,255,255,.92); backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    height: var(--nav-height);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 100%; }

.logo { display: flex; align-items: center; gap: 8px; text-decoration: none; color: var(--text); }
.logo-icon { font-size: 24px; color: var(--primary); }
.logo-text { font-size: 20px; font-weight: 700; letter-spacing: 1px; }

.nav { display: flex; gap: 4px; }
.nav-link {
    text-decoration: none; color: var(--text-secondary); font-size: 15px;
    padding: 8px 16px; border-radius: 8px; transition: all .2s ease;
}
.nav-link:hover, .nav-link.active { color: var(--primary); background: var(--primary-light); }

.menu-btn {
    display: none; flex-direction: column; gap: 5px;
    background: none; border: none; cursor: pointer; padding: 8px;
}
.menu-btn span { display: block; width: 24px; height: 2px; background: var(--text); border-radius: 2px; transition: .3s; }

/* --- Hero 首屏 --- */
.hero {
    padding-top: calc(var(--nav-height) + 60px);
    padding-bottom: 80px;
    background: linear-gradient(135deg, #eff6ff 0%, #f0f9ff 50%, #fefce8 100%);
    min-height: 100vh;
    display: flex; align-items: center;
}
.hero-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.hero-content { max-width: 560px; }
.hero-title { font-size: 48px; font-weight: 800; line-height: 1.2; color: var(--text); margin-bottom: 20px; }
.hero-title .highlight { color: var(--primary); position: relative; }
.hero-title .highlight::after {
    content: ''; position: absolute; bottom: 4px; left: 0; right: 0;
    height: 10px; background: rgba(26,86,219,.15); border-radius: 4px; z-index: -1;
}
.hero-desc { font-size: 18px; color: var(--text-secondary); margin-bottom: 36px; line-height: 1.8; }
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }

.btn {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 14px 32px; border-radius: 10px; font-size: 16px; font-weight: 600;
    text-decoration: none; transition: all .25s ease; cursor: pointer; border: none;
}
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 4px 14px rgba(26,86,219,.35); }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(26,86,219,.45); }
.btn-outline { background: #fff; color: var(--primary); border: 2px solid var(--primary); }
.btn-outline:hover { background: var(--primary); color: #fff; }

.hero-visual { display: flex; flex-direction: column; gap: 20px; align-items: center; }
.hero-card {
    background: #fff; border-radius: var(--radius); padding: 24px 28px;
    box-shadow: var(--shadow-lg); width: 260px; text-align: center;
    transition: transform .3s ease;
}
.hero-card:hover { transform: translateY(-4px); }
.hero-card.offset { margin-left: 60px; }
.hero-card-icon { font-size: 32px; margin-bottom: 8px; }
.hero-card-label { font-weight: 700; font-size: 16px; color: var(--text); margin-bottom: 4px; }
.hero-card-value { font-size: 13px; color: var(--text-secondary); }

/* --- Section 通用 --- */
.section { padding: 90px 0; }
.section-header { text-align: center; margin-bottom: 56px; }
.section-tag {
    display: inline-block; font-size: 13px; font-weight: 600; color: var(--primary);
    background: var(--primary-light); padding: 6px 18px; border-radius: 20px;
    margin-bottom: 16px; letter-spacing: 1px; text-transform: uppercase;
}
.section-title { font-size: 36px; font-weight: 800; color: var(--text); margin-bottom: 12px; }
.section-desc { font-size: 17px; color: var(--text-secondary); max-width: 600px; margin: 0 auto; }

/* --- 关于我们 --- */
.about { background: var(--bg); }
.about-grid { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 60px; align-items: start; }
.about-text p {
    font-size: 16px; color: var(--text-secondary); margin-bottom: 16px; line-height: 1.9;
    text-indent: 2em;
}
.about-text strong { color: var(--text); }
.about-text em { color: var(--primary); font-style: normal; font-weight: 600; }
.about-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.stat-item {
    background: var(--bg-gray); border-radius: var(--radius); padding: 28px 20px;
    text-align: center; border: 1px solid var(--border);
}
.stat-num { display: block; font-size: 36px; font-weight: 800; color: var(--primary); }
.stat-label { display: block; font-size: 14px; color: var(--text-secondary); margin-top: 4px; }

/* --- 服务项目 --- */
.service { background: var(--bg-gray); }
.service-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.service-card {
    background: #fff; border-radius: var(--radius); padding: 32px 24px;
    border: 1px solid var(--border); transition: all .3s ease;
}
.service-card:hover { border-color: var(--primary); box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.service-icon { font-size: 40px; margin-bottom: 16px; }
.service-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 12px; color: var(--text); }
.service-card > p { font-size: 14px; color: var(--text-secondary); margin-bottom: 16px; line-height: 1.8; }
.service-list { list-style: none; }
.service-list li {
    font-size: 13px; color: var(--text-secondary); padding: 6px 0;
    border-bottom: 1px dashed var(--border);
}
.service-list li::before { content: '✓ '; color: var(--primary); font-weight: 700; }
.service-list li:last-child { border-bottom: none; }

/* --- 核心优势 --- */
.advantage { background: var(--bg); }
.advantage-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.advantage-item {
    background: var(--bg-gray); border-radius: var(--radius); padding: 32px 24px;
    border: 1px solid var(--border); transition: all .3s ease;
}
.advantage-item:hover { border-color: var(--primary); transform: translateY(-2px); }
.advantage-num {
    font-size: 48px; font-weight: 800; color: var(--primary-light); line-height: 1; margin-bottom: 12px;
}
.advantage-item h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.advantage-item p { font-size: 14px; color: var(--text-secondary); line-height: 1.8; }

/* --- 联系我们 --- */
.contact { background: var(--bg-gray); }
.contact-grid { display: grid; grid-template-columns: 1fr 300px; gap: 60px; align-items: center; }
.contact-info { display: flex; flex-direction: column; gap: 20px; }
.contact-item { display: flex; align-items: flex-start; gap: 16px; }
.contact-icon { font-size: 24px; flex-shrink: 0; width: 48px; height: 48px; display: flex; align-items: center; justify-content: center; background: var(--primary-light); border-radius: 10px; }
.contact-item h4 { font-size: 14px; color: var(--text-secondary); margin-bottom: 2px; }
.contact-item p { font-size: 16px; color: var(--text); font-weight: 500; }

.contact-qr { display: flex; justify-content: center; }
.qr-placeholder {
    background: #fff; border: 2px dashed var(--border); border-radius: var(--radius);
    padding: 40px 30px; text-align: center; width: 220px;
}
.qr-placeholder > span { display: block; font-size: 15px; font-weight: 700; color: var(--text); margin-bottom: 20px; }
.qr-icon { font-size: 64px; margin-bottom: 16px; opacity: .6; }
.qr-placeholder small { font-size: 12px; color: var(--text-secondary); }

/* --- 页脚 --- */
.footer { background: #111827; color: #9ca3af; padding: 56px 0 28px; }
.footer-inner { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-brand .logo { color: #fff; margin-bottom: 12px; }
.footer-brand p { font-size: 14px; }
.footer-links h4 { color: #fff; font-size: 15px; font-weight: 600; margin-bottom: 16px; }
.footer-links a { display: block; text-decoration: none; color: #9ca3af; font-size: 14px; padding: 4px 0; transition: color .2s; }
.footer-links a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid #1f2937; padding-top: 24px; text-align: center; font-size: 13px; }

/* --- 响应式 --- */
@media (max-width: 1024px) {
    .service-grid, .advantage-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .hero { padding-top: calc(var(--nav-height) + 40px); padding-bottom: 60px; min-height: auto; }
    .hero-inner { grid-template-columns: 1fr; gap: 40px; }
    .hero-title { font-size: 32px; }
    .hero-desc { font-size: 16px; }
    .hero-visual { display: none; }
    .section { padding: 60px 0; }
    .section-title { font-size: 28px; }
    .about-grid { grid-template-columns: 1fr; gap: 40px; }
    .about-stats { grid-template-columns: repeat(2, 1fr); }
    .service-grid { grid-template-columns: 1fr; }
    .advantage-grid { grid-template-columns: 1fr 1fr; }
    .contact-grid { grid-template-columns: 1fr; gap: 40px; }
    .footer-inner { grid-template-columns: 1fr; gap: 30px; }

    /* 移动端菜单 */
    .menu-btn { display: flex; }
    .nav {
        position: fixed; top: var(--nav-height); left: 0; right: 0;
        background: #fff; flex-direction: column; padding: 16px;
        border-bottom: 1px solid var(--border); gap: 4px;
        transform: translateY(-100%); opacity: 0; pointer-events: none;
        transition: all .3s ease;
    }
    .nav.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
    .nav-link { padding: 12px 16px; }
}

@media (max-width: 480px) {
    .hero-btns { flex-direction: column; }
    .btn { text-align: center; justify-content: center; }
    .advantage-grid { grid-template-columns: 1fr; }
}