/* css/style.css - 更新样式，放大logo并优化固定导航 */

:root {
    --red-primary: #e53e3e;
    --blue-primary: #2563eb;
    --red-dark: #c53030;
    --blue-dark: #1e40af;
    --gray-bg: #f9fafb;
    --gray-light: #f3f4f6;
    --gray-border: #e5e7eb;
    --text-dark: #111827;
    --text-muted: #4b5563;
    --shadow-sm: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.02);
    --shadow-md: 0 20px 25px -5px rgba(0, 0, 0, 0.05), 0 10px 10px -5px rgba(0, 0, 0, 0.01);
    --transition: all 0.25s ease;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: #ffffff;
    color: var(--text-dark);
    line-height: 1.5;
    scroll-behavior: smooth;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 32px;
}

/* 导航栏样式 - 强化固定效果 */
.navbar {
    position: sticky;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(12px);
    z-index: 1000;
    border-bottom: 1px solid var(--gray-border);
    padding: 16px 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
    transition: all 0.3s ease;
}

/* 滚动时添加更明显的阴影 */
.navbar.scrolled {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    padding: 12px 0;
}

.nav-flex {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 16px;
    cursor: pointer;
}

/* logo图片样式 - 放大尺寸 */
.logo-img {
    width: 50px;
    height: 50px;
    object-fit: contain;
    border-radius: 12px;
    transition: var(--transition);
}

.logo-area:hover .logo-img {
    transform: scale(1.02);
}

/* 文字logo样式（备用） */
.logo-marker {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--red-primary) 0%, var(--red-primary) 40%, var(--blue-primary) 90%);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 6px 12px -6px rgba(0, 0, 0, 0.2);
    transition: var(--transition);
}

.logo-marker span {
    font-weight: 800;
    font-size: 28px;
    color: white;
    letter-spacing: 1px;
}

.logo-text h1 {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(120deg, var(--red-primary), var(--blue-primary));
    background-clip: text;
    -webkit-background-clip: text;
    color: transparent;
    letter-spacing: -0.3px;
    line-height: 1.3;
}

.logo-text p {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-muted);
    letter-spacing: 1px;
}

.nav-links {
    display: flex;
    gap: 32px;
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    font-weight: 600;
    color: var(--text-dark);
    transition: var(--transition);
    font-size: 1rem;
    padding: 8px 0;
    position: relative;
}

.nav-links a:hover {
    color: var(--blue-primary);
}

.nav-links a.active {
    color: var(--red-primary);
}

.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--red-primary);
    border-radius: 2px;
}

.mobile-menu-btn {
    display: none;
    font-size: 28px;
    cursor: pointer;
    color: var(--text-dark);
}

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: 40px;
    font-weight: 600;
    transition: var(--transition);
    cursor: pointer;
    text-decoration: none;
    border: none;
    font-size: 0.95rem;
}

.btn-primary {
    background: var(--blue-primary);
    color: white;
    box-shadow: 0 2px 6px rgba(37, 99, 235, 0.2);
}

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

.btn-outline {
    background: transparent;
    border: 1.5px solid var(--red-primary);
    color: var(--red-primary);
}

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

/* 通用区块 */
section {
    padding: 80px 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
    background: linear-gradient(to right, #1e293b, #2d3a5e);
    background-clip: text;
    -webkit-background-clip: text;
    color: transparent;
}

.section-sub {
    font-size: 1.2rem;
    color: var(--text-muted);
    max-width: 680px;
    margin-bottom: 48px;
}

.grid-2col {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
}

.grid-3col {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.service-card,
.case-card {
    background: white;
    border-radius: 28px;
    padding: 32px 24px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-border);
    transition: var(--transition);
}

.service-card:hover,
.case-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
    border-color: #cbd5e1;
}

.service-icon {
    font-size: 2.6rem;
    background: linear-gradient(135deg, var(--red-primary) 20%, var(--blue-primary) 100%);
    background-clip: text;
    -webkit-background-clip: text;
    color: transparent;
    margin-bottom: 20px;
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: 12px;
    font-weight: 700;
}

.tag {
    display: inline-block;
    background: var(--gray-light);
    padding: 6px 12px;
    border-radius: 40px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--blue-primary);
    margin-top: 12px;
}

.tag.license {
    background: #fee2e2;
    color: var(--red-primary);
}

.service-features {
    list-style: none;
    margin-top: 16px;
    padding-left: 0;
}

.service-features li {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.case-img-placeholder {
    background: linear-gradient(135deg, #f0f2ff, #eef2ff);
    height: 180px;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.case-img-placeholder i {
    font-size: 4rem;
    color: var(--blue-primary);
}

.case-badge {
    font-weight: 700;
    color: var(--red-primary);
    font-size: 0.8rem;
    margin-bottom: 8px;
    display: inline-block;
}

/* Hero区域 */
.hero {
    padding: 60px 0 40px 0;
    background: linear-gradient(145deg, #ffffff 0%, #fef2f2 100%);
}

.hero-grid {
    display: flex;
    align-items: center;
    gap: 48px;
    flex-wrap: wrap;
}

.hero-content {
    flex: 1;
}

.hero-badge {
    background: rgba(229, 62, 62, 0.12);
    color: var(--red-dark);
    padding: 6px 16px;
    border-radius: 40px;
    font-weight: 600;
    font-size: 0.85rem;
    display: inline-block;
    margin-bottom: 20px;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
}

.hero-highlight {
    background: linear-gradient(120deg, var(--red-primary), var(--blue-primary));
    background-clip: text;
    -webkit-background-clip: text;
    color: transparent;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    margin-top: 32px;
    flex-wrap: wrap;
}

.hero-visual {
    flex: 1;
    background: linear-gradient(125deg, rgba(229, 62, 62, 0.08), rgba(37, 99, 235, 0.08));
    border-radius: 48px;
    padding: 32px;
    text-align: center;
}

.hero-visual i {
    color: var(--blue-primary);
}

.hero-visual i:first-child {
    color: var(--red-primary);
}

.stats {
    display: flex;
    justify-content: space-between;
    margin-top: 48px;
    gap: 24px;
    flex-wrap: wrap;
}

.stat-item h4 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--blue-primary);
}

/* 页面头部 */
.page-header {
    background: linear-gradient(135deg, var(--red-primary) 0%, var(--blue-primary) 100%);
    color: white;
    text-align: center;
    padding: 80px 0 60px;
    margin-top: 0;
}

.page-header h1 {
    font-size: 3rem;
    margin-bottom: 16px;
}

.page-header p {
    font-size: 1.2rem;
    opacity: 0.9;
}

/* 关于页面 */
.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 48px;
}

.about-text h2,
.about-text h3 {
    margin-bottom: 20px;
}

.about-text p {
    margin-bottom: 24px;
    color: var(--text-muted);
    line-height: 1.7;
}

.scope-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    margin: 20px 0;
}

.scope-grid div {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
}

.scope-grid i {
    color: var(--blue-primary);
}

.license-note {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 16px;
}

.about-stats {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.stat-card {
    background: var(--gray-bg);
    border-radius: 24px;
    padding: 32px;
    text-align: center;
    border: 1px solid var(--gray-border);
}

.stat-card i {
    font-size: 2.5rem;
    color: var(--red-primary);
    margin-bottom: 16px;
}

.stat-card h3 {
    font-size: 2rem;
    color: var(--blue-primary);
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    text-align: center;
}

.value-item i {
    font-size: 3rem;
    background: linear-gradient(135deg, var(--red-primary), var(--blue-primary));
    background-clip: text;
    -webkit-background-clip: text;
    color: transparent;
    margin-bottom: 16px;
}

/* 联系我们页面 */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
}

.contact-info h2,
.contact-form h2 {
    margin-bottom: 32px;
}

.contact-detail {
    display: flex;
    gap: 20px;
    margin-bottom: 32px;
}

.contact-detail i {
    font-size: 1.5rem;
    color: var(--red-primary);
    width: 40px;
}

.contact-detail h4 {
    margin-bottom: 8px;
}

.contact-detail p {
    color: var(--text-muted);
}

.contact-form form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
    padding: 14px 18px;
    border: 1px solid var(--gray-border);
    border-radius: 16px;
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--blue-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* 案例标签页 */
.case-tabs {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 48px;
}

.tab-btn {
    padding: 12px 32px;
    border: none;
    background: var(--gray-light);
    border-radius: 40px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.tab-btn.active {
    background: var(--red-primary);
    color: white;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* 技术栈 */
.tech-icons {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
    margin-top: 32px;
}

.tech-icons span {
    background: white;
    padding: 12px 24px;
    border-radius: 40px;
    font-weight: 500;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-border);
}

/* 页脚 */
footer {
    background: #0f172a;
    color: #cbd5e1;
    padding: 48px 0 24px;
    margin-top: 40px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 32px;
    margin-bottom: 40px;
}

.footer-logo p {
    margin-top: 12px;
    font-size: 0.85rem;
}

.footer-links h4 {
    color: white;
    margin-bottom: 20px;
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    color: #9ca3af;
    text-decoration: none;
}

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

.copyright {
    text-align: center;
    border-top: 1px solid #1e293b;
    padding-top: 32px;
    font-size: 0.8rem;
}

/* 响应式 */
@media (max-width: 900px) {
    .nav-links {
        display: none;
        width: 100%;
        flex-direction: column;
        background: white;
        padding: 24px;
        margin-top: 16px;
        border-radius: 28px;
        gap: 20px;
        box-shadow: var(--shadow-md);
    }

    .nav-links.show {
        display: flex;
    }

    .mobile-menu-btn {
        display: block;
    }

    .grid-2col,
    .grid-3col,
    .about-content,
    .contact-grid,
    .values-grid,
    .footer-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .container {
        padding: 0 20px;
    }

    section {
        padding: 60px 0;
    }

    .page-header h1 {
        font-size: 2.2rem;
    }

    .hero-visual {
        order: -1;
    }

    /* 移动端logo调整 */
    .logo-img {
        width: 38px;
        height: 38px;
    }

    .logo-text h1 {
        font-size: 1.1rem;
    }

    .logo-text p {
        font-size: 0.65rem;
    }

    .logo-area {
        gap: 10px;
    }
}