/* ============================================
   广西领创世纪网络科技有限公司 官网样式
   ============================================ */

/* --- 基础重置与变量 --- */
:root {
    --primary: #1a56db;
    --primary-dark: #1e40af;
    --primary-light: #3b82f6;
    --accent: #0ea5e9;
    --text: #1f2937;
    --text-light: #6b7280;
    --bg: #ffffff;
    --bg-alt: #f8fafc;
    --bg-dark: #0f172a;
    --border: #e5e7eb;
    --radius: 8px;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --transition: 0.3s ease;
}

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

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

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

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* --- 按钮 --- */
.btn {
    display: inline-block;
    padding: 12px 32px;
    border-radius: 50px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: all var(--transition);
    text-align: center;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-outline {
    background: transparent;
    color: #fff;
    border: 2px solid rgba(255, 255, 255, 0.8);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
}

.btn-block {
    display: block;
    width: 100%;
}

/* --- 头部导航 --- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
    transition: all var(--transition);
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo h1 {
    font-size: 22px;
    color: var(--primary);
    font-weight: 700;
    letter-spacing: 1px;
}

.nav ul {
    display: flex;
    gap: 32px;
}

.nav a {
    font-size: 15px;
    color: var(--text);
    font-weight: 500;
    position: relative;
    transition: color var(--transition);
    padding: 8px 0;
}

.nav a:hover,
.nav a.active {
    color: var(--primary);
}

.nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width var(--transition);
}

.nav a:hover::after,
.nav a.active::after {
    width: 100%;
}

/* 移动端菜单按钮 */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.menu-toggle span {
    display: block;
    width: 25px;
    height: 2px;
    background: var(--text);
    transition: all var(--transition);
}

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* --- Banner --- */
.banner {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 40%, #1a56db 100%);
    overflow: hidden;
}

.banner::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.3) 0%, transparent 70%);
    border-radius: 50%;
    animation: float 8s ease-in-out infinite;
}

.banner::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(14, 165, 233, 0.2) 0%, transparent 70%);
    border-radius: 50%;
    animation: float 10s ease-in-out infinite reverse;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(30px, -30px); }
}

.banner-overlay {
    position: absolute;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' xmlns='http://www.w3.org/2000/svg'%3E%3Cdefs%3E%3Cpattern id='grid' width='60' height='60' patternUnits='userSpaceOnUse'%3E%3Cpath d='M 60 0 L 0 0 0 60' fill='none' stroke='rgba(255,255,255,0.03)' stroke-width='1'/%3E%3C/pattern%3E%3C/defs%3E%3Crect width='100%25' height='100%25' fill='url(%23grid)'/%3E%3C/svg%3E");
}

.banner-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: #fff;
    max-width: 800px;
    margin: 0 auto;
    padding: 120px 0;
}

.banner-content h2 {
    font-size: 52px;
    font-weight: 800;
    margin-bottom: 16px;
    letter-spacing: 2px;
    animation: fadeInUp 0.8s ease;
}

.banner-subtitle {
    font-size: 22px;
    font-weight: 300;
    margin-bottom: 12px;
    opacity: 0.9;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.banner-desc {
    font-size: 17px;
    opacity: 0.75;
    margin-bottom: 36px;
    animation: fadeInUp 0.8s ease 0.4s both;
}

.banner-btns {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease 0.6s both;
}

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

/* --- Section 通用 --- */
.section {
    padding: 100px 0;
}

.section:nth-child(even) {
    background: var(--bg-alt);
}

.section-title {
    text-align: center;
    margin-bottom: 60px;
}

.section-title h2 {
    font-size: 36px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 8px;
}

.section-title .subtitle {
    font-size: 14px;
    color: var(--primary);
    font-weight: 600;
    letter-spacing: 4px;
    text-transform: uppercase;
}

.section-desc {
    color: var(--text-light);
    margin-top: 12px;
    font-size: 16px;
}

/* --- 公司简介 --- */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.about-text p {
    margin-bottom: 16px;
    color: var(--text-light);
    font-size: 15px;
    line-height: 1.9;
}

.about-lead {
    font-size: 18px !important;
    color: var(--text) !important;
    font-weight: 500;
    border-left: 4px solid var(--primary);
    padding-left: 20px;
    margin-bottom: 24px !important;
}

.about-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.stat-item {
    background: #fff;
    border-radius: var(--radius);
    padding: 30px 20px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: transform var(--transition);
}

.stat-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.stat-number {
    display: block;
    font-size: 36px;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 4px;
}

.stat-label {
    font-size: 14px;
    color: var(--text-light);
}

/* --- 经营范围 --- */
.business-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.business-card {
    background: #fff;
    border-radius: var(--radius);
    padding: 36px 28px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: all var(--transition);
    border: 1px solid var(--border);
}

.business-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.card-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.business-card h3 {
    font-size: 18px;
    margin-bottom: 12px;
    color: var(--text);
}

.business-card p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
}

/* --- 核心服务 --- */
.services-tabs {
    max-width: 900px;
    margin: 0 auto;
}

.tab-buttons {
    display: flex;
    gap: 8px;
    margin-bottom: 32px;
    justify-content: center;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 12px 28px;
    border: 2px solid var(--border);
    background: #fff;
    border-radius: 50px;
    cursor: pointer;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-light);
    transition: all var(--transition);
}

.tab-btn:hover {
    border-color: var(--primary-light);
    color: var(--primary);
}

.tab-btn.active {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.tab-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.tab-item {
    background: #fff;
    padding: 20px 24px;
    border-radius: var(--radius);
    border-left: 4px solid var(--primary);
    font-size: 15px;
    font-weight: 500;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
    transition: all var(--transition);
}

.tab-item:hover {
    border-left-color: var(--accent);
    box-shadow: var(--shadow);
    transform: translateX(4px);
}

/* --- 核心优势 --- */
.advantage-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.advantage-card {
    background: #fff;
    border-radius: var(--radius);
    padding: 36px 28px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: all var(--transition);
    border: 1px solid var(--border);
}

.advantage-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.adv-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.advantage-card h3 {
    font-size: 18px;
    margin-bottom: 12px;
    color: var(--text);
}

.advantage-card p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.8;
}

/* --- 联系我们 --- */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: start;
}

.contact-item {
    display: flex;
    gap: 16px;
    margin-bottom: 28px;
    align-items: flex-start;
}

.contact-icon {
    font-size: 28px;
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    background: rgba(26, 86, 219, 0.08);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.contact-item h4 {
    font-size: 16px;
    color: var(--text);
    margin-bottom: 4px;
}

.contact-item p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
}

.contact-form {
    background: #fff;
    padding: 36px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
}

.contact-form h3 {
    font-size: 22px;
    margin-bottom: 24px;
    text-align: center;
}

.form-group {
    margin-bottom: 16px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    font-size: 15px;
    font-family: inherit;
    transition: border-color var(--transition);
    background: var(--bg-alt);
    outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--primary);
    background: #fff;
}

.form-group textarea {
    resize: vertical;
}

/* --- 合作伙伴 --- */
.partners {
    padding: 80px 0;
    background: #fff;
}

.partner-logos {
    display: flex;
    justify-content: center;
    gap: 60px;
    flex-wrap: wrap;
}

.partner-item {
    display: flex;
    align-items: center;
    justify-content: center;
}

.partner-name {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-light);
    letter-spacing: 2px;
    padding: 20px 40px;
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    transition: all var(--transition);
}

.partner-name:hover {
    color: var(--primary);
    border-color: var(--primary);
}

/* --- 页脚 --- */
.footer {
    background: var(--bg-dark);
    color: #cbd5e1;
    padding: 60px 0 0;
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-info h3 {
    font-size: 20px;
    color: #fff;
    margin-bottom: 12px;
}

.footer-info p {
    font-size: 14px;
    line-height: 1.8;
    color: #94a3b8;
}

.footer-cert {
    margin-top: 8px;
    font-size: 13px !important;
    color: #64748b !important;
}

.footer-links h4,
.footer-services h4 {
    font-size: 16px;
    color: #fff;
    margin-bottom: 16px;
}

.footer-links ul,
.footer-services ul {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-links a {
    font-size: 14px;
    color: #94a3b8;
    transition: color var(--transition);
}

.footer-links a:hover {
    color: var(--primary-light);
}

.footer-services li {
    font-size: 14px;
    color: #94a3b8;
}

.footer-bottom {
    text-align: center;
    padding: 24px 0;
    font-size: 13px;
    color: #64748b;
}

/* --- 响应式设计 --- */

/* 平板 */
@media (max-width: 992px) {
    .about-grid,
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .business-grid,
    .advantage-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-content {
        grid-template-columns: 1fr 1fr;
    }

    .banner-content h2 {
        font-size: 40px;
    }

    .section-title h2 {
        font-size: 30px;
    }

    .tab-grid {
        grid-template-columns: 1fr 1fr;
    }
}

/* 手机 */
@media (max-width: 768px) {
    .header .container {
        height: 60px;
    }

    .menu-toggle {
        display: flex;
    }

    .nav {
        position: fixed;
        top: 60px;
        left: 0;
        width: 100%;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(10px);
        padding: 20px;
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        transform: translateY(-120%);
        opacity: 0;
        transition: all 0.3s ease;
        z-index: 999;
    }

    .nav.active {
        transform: translateY(0);
        opacity: 1;
    }

    .nav ul {
        flex-direction: column;
        gap: 0;
    }

    .nav a {
        display: block;
        padding: 14px 0;
        border-bottom: 1px solid var(--border);
        font-size: 16px;
    }

    .banner-content h2 {
        font-size: 30px;
    }

    .banner-subtitle {
        font-size: 18px;
    }

    .banner-desc {
        font-size: 15px;
    }

    .section {
        padding: 70px 0;
    }

    .section-title h2 {
        font-size: 26px;
    }

    .business-grid,
    .advantage-grid {
        grid-template-columns: 1fr;
    }

    .tab-grid {
        grid-template-columns: 1fr;
    }

    .tab-buttons {
        flex-direction: column;
    }

    .tab-btn {
        text-align: center;
    }

    .contact-form {
        padding: 24px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-links ul,
    .footer-services ul {
        align-items: center;
    }

    .about-stats {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }

    .stat-number {
        font-size: 28px;
    }

    .partner-logos {
        gap: 20px;
    }

    .partner-name {
        font-size: 18px;
        padding: 16px 24px;
    }

    .btn {
        padding: 10px 24px;
        font-size: 15px;
    }
}

@media (max-width: 480px) {
    .banner-content h2 {
        font-size: 24px;
    }

    .banner-btns {
        flex-direction: column;
        align-items: center;
    }

    .about-stats {
        grid-template-columns: 1fr;
    }
}