/* ==================== 基础设置 ==================== */
:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --secondary: #0ea5e9;
    --accent: #f97316;
    --bg-dark: #0f172a;
    --bg-light: #f8fafc;
    --text-dark: #1e293b;
    --text-gray: #64748b;
    --text-light: #94a3b8;
    --white: #ffffff;
    --border: #e2e8f0;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --radius: 12px;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--text-dark);
    line-height: 1.6;
    background: var(--white);
}

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

ul {
    list-style: none;
}

img {
    max-width: 100%;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ==================== 通用按钮 ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--white);
    border-color: transparent;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(37, 99, 235, 0.3);
}

.btn-outline {
    background: transparent;
    color: var(--white);
    border-color: var(--white);
}

.btn-outline:hover {
    background: var(--white);
    color: var(--primary);
}

.btn-large {
    padding: 16px 36px;
    font-size: 16px;
}

.btn svg {
    width: 20px;
    height: 20px;
}

/* ==================== 导航栏 ==================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    transition: var(--transition);
}

.header.scrolled {
    padding: 12px 0;
    box-shadow: var(--shadow);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-weight: 700;
    font-size: 14px;
}

.logo-text {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-dark);
}

.nav {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-link {
    font-size: 15px;
    color: var(--text-gray);
    transition: var(--transition);
    position: relative;
}

.nav-link:hover {
    color: var(--primary);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: var(--transition);
}

.nav-link:hover::after {
    width: 100%;
}

.nav-cta {
    background: var(--primary);
    color: var(--white) !important;
    padding: 10px 20px;
    border-radius: 8px;
}

.nav-cta::after {
    display: none;
}

.nav-cta:hover {
    background: var(--primary-dark);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-dark);
    transition: var(--transition);
}

/* ==================== Hero区域 ==================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, var(--bg-dark) 0%, #1e3a5f 100%);
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.hero .container {
    position: relative;
    z-index: 1;
}

.hero-content {
    max-width: 800px;
    text-align: center;
    margin: 0 auto;
    padding: 120px 0 80px;
}

.hero-title {
    color: var(--white);
    margin-bottom: 24px;
}

.hero-title-line1 {
    display: block;
    font-size: clamp(36px, 6vw, 64px);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 12px;
}

.hero-title-line2 {
    display: block;
    font-size: clamp(24px, 4vw, 40px);
    font-weight: 400;
    opacity: 0.9;
    background: linear-gradient(135deg, var(--primary-light), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-desc {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 40px;
    line-height: 1.8;
}

.hero-btns {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.hero-decoration {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.decoration-circle {
    position: absolute;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    opacity: 0.1;
}

.circle-1 {
    width: 400px;
    height: 400px;
    top: -100px;
    right: -100px;
}

.circle-2 {
    width: 300px;
    height: 300px;
    bottom: -50px;
    left: -50px;
}

.circle-3 {
    width: 200px;
    height: 200px;
    top: 50%;
    right: 20%;
}

/* ==================== 通用区块 ==================== */
.section {
    padding: 100px 0;
}

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

.section-title {
    font-size: 36px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 16px;
}

.section-desc {
    font-size: 18px;
    color: var(--text-gray);
}

/* ==================== 服务区域 ==================== */
.services {
    background: var(--bg-light);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.service-card {
    background: var(--white);
    padding: 32px 24px;
    border-radius: var(--radius);
    text-align: center;
    transition: var(--transition);
    border: 1px solid var(--border);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.service-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.service-icon svg {
    width: 32px;
    height: 32px;
    color: var(--white);
}

.service-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-dark);
}

.service-desc {
    font-size: 14px;
    color: var(--text-gray);
    line-height: 1.7;
}

/* ==================== 优势区域 ==================== */
.advantages-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

@media (max-width: 1024px) {
    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .advantages-grid {
        grid-template-columns: 1fr;
    }
}

.advantage-item {
    display: flex;
    gap: 20px;
    padding: 24px;
    background: var(--white);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    transition: var(--transition);
}

.advantage-item:hover {
    border-color: var(--primary-light);
    box-shadow: var(--shadow);
}

.advantage-num {
    font-size: 36px;
    font-weight: 700;
    color: var(--primary);
    opacity: 0.3;
    line-height: 1;
}

.advantage-content h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-dark);
}

.advantage-content p {
    font-size: 15px;
    color: var(--text-gray);
    line-height: 1.7;
}

/* ==================== 技术栈 ==================== */
.tech {
    background: var(--bg-light);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: 20px;
}

.tech-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 24px 16px;
    background: var(--white);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    transition: var(--transition);
}

.tech-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
    border-color: var(--primary-light);
}

.tech-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    display: flex;
    align-items: center;
    justify-content: center;
}

.tech-icon::before {
    content: attr(data-text);
    font-size: 20px;
    font-weight: 700;
    color: var(--white);
}

.dotnet::before { content: '.N'; }
.vue::before { content: 'V'; }
.uniapps::before { content: 'U'; }
.mysql::before { content: 'M'; }
.redis::before { content: 'R'; }
.docker::before { content: 'D'; }
.linux::before { content: 'L'; }
.nginx::before { content: 'N'; }

.tech-item span {
    font-size: 13px;
    color: var(--text-gray);
    font-weight: 500;
}

/* ==================== 案例区域 ==================== */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

@media (max-width: 1024px) {
    .cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .cases-grid {
        grid-template-columns: 1fr;
    }
}

.case-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 24px;
    border: 1px solid var(--border);
    position: relative;
    transition: var(--transition);
}

.case-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.case-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--white);
    padding: 4px 14px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}

.case-badge.highlight {
    background: linear-gradient(135deg, var(--accent), #fb923c);
}

.case-title {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.case-industry {
    font-size: 14px;
    color: var(--text-gray);
    margin-bottom: 24px;
}

.case-modules {
    margin-bottom: 24px;
}

.case-modules h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.case-modules ul {
    display: grid;
    grid-template-columns: 1fr;
    gap: 6px 24px;
}

.case-modules li {
    font-size: 14px;
    color: var(--text-gray);
    padding-left: 16px;
    position: relative;
}

.case-modules li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 6px;
    height: 6px;
    background: var(--primary);
    border-radius: 50%;
}

.case-tech {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.tech-tag {
    background: var(--bg-light);
    color: var(--text-gray);
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 500;
}

.cases-note {
    text-align: center;
    margin-top: 40px;
    color: var(--text-gray);
    font-size: 15px;
}

/* ==================== 关于我们 ==================== */
.about {
    background: linear-gradient(135deg, var(--bg-dark) 0%, #1e3a5f 100%);
    color: var(--white);
}

.about .section-title {
    color: var(--white);
}

.about-content {
    display: grid;
    grid-template-columns: 300px 1fr;
    grid-template-rows: auto auto;
    gap: 40px 60px;
    align-items: start;
}

.about-visual {
    position: relative;
    grid-row: span 2;
}

.about-lobster {
    width: 100%;
    max-width: 280px;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.lobster-badge {
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--white);
    padding: 8px 20px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 6px;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.4);
}

.lobster-emoji {
    font-size: 18px;
}

.about-text p {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 16px;
    line-height: 1.8;
}

.about-text strong {
    color: var(--white);
}

.about-features {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-top: 24px;
}

.about-feature {
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.1);
    padding: 10px 18px;
    border-radius: 25px;
    font-size: 14px;
    color: var(--white);
}

.feature-icon {
    font-size: 18px;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.stat-item {
    text-align: center;
    padding: 24px 16px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius);
}

.stat-num {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 6px;
    background: linear-gradient(135deg, var(--primary-light), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.7);
}

/* ==================== 联系方式 ==================== */
.contact {
    background: var(--bg-light);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.contact-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-icon svg {
    width: 28px;
    height: 28px;
    color: var(--white);
}

.contact-text h4 {
    font-size: 14px;
    color: var(--text-gray);
    margin-bottom: 4px;
}

.contact-text p {
    font-size: 18px;
    font-weight: 500;
    color: var(--text-dark);
}

.contact-text a {
    color: var(--primary);
}

.contact-text a:hover {
    text-decoration: underline;
}

.contact-text .same-number {
    font-size: 13px;
    color: var(--text-light);
    font-weight: 400;
}

.contact-cta {
    text-align: center;
    padding: 48px;
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
}

.contact-cta h3 {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.contact-cta p {
    font-size: 15px;
    color: var(--text-gray);
    margin-bottom: 28px;
}

.contact-cta .btn-primary {
    width: 100%;
}

/* ==================== 页脚 ==================== */
.footer {
    background: var(--bg-dark);
    color: var(--white);
    padding: 40px 0 20px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 24px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    margin-bottom: 20px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 16px;
    font-weight: 500;
}

.footer-links {
    display: flex;
    gap: 32px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
    transition: var(--transition);
}

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

.footer-bottom {
    text-align: center;
}

.footer-bottom p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.5);
    margin: 4px 0;
}

.footer-bottom .beian a {
    color: rgba(255, 255, 255, 0.5);
    font-size: 12px;
    text-decoration: none;
}

.footer-bottom .beian a:hover {
    color: var(--white);
    text-decoration: underline;
}

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

    .tech-grid {
        grid-template-columns: repeat(4, 1fr);
    }

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

    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .about-visual {
        grid-row: span 1;
        text-align: center;
    }

    .about-lobster {
        max-width: 220px;
    }

    .contact-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }

    .nav {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 24px;
        gap: 16px;
        box-shadow: var(--shadow);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
    }

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

    .nav-link {
        display: block;
        padding: 12px 0;
        text-align: center;
    }

    .nav-cta {
        width: 100%;
        justify-content: center;
    }

    .hero-content {
        padding: 100px 0 60px;
    }

    .hero-desc {
        font-size: 16px;
    }

    .section {
        padding: 60px 0;
    }

    .section-title {
        font-size: 28px;
    }

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

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

    .tech-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .case-modules ul {
        grid-template-columns: 1fr;
    }

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

    .footer-content {
        flex-direction: column;
        gap: 24px;
    }

    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
    }
}