/* 基础样式 */
:root {
    --primary: #0ea5e9;
    --primary-dark: #0284c7;
    --primary-light: #38bdf8;
    --secondary: #06b6d4;
    --accent: #14b8a6;
    --dark: #0f172a;
    --dark-light: #1e293b;
    --gray: #64748b;
    --gray-light: #94a3b8;
    --light: #f1f5f9;
    --white: #ffffff;
    --gradient-1: linear-gradient(135deg, #0ea5e9 0%, #06b6d4 100%);
    --gradient-2: linear-gradient(135deg, #06b6d4 0%, #14b8a6 100%);
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--dark);
    line-height: 1.6;
    background: var(--white);
    overflow-x: hidden;
}

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

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
}

.logo-icon {
    width: 36px;
    height: 36px;
    background: var(--gradient-1);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-weight: 700;
    font-size: 18px;
}

.logo-text {
    font-size: 22px;
    font-weight: 700;
    color: var(--dark);
    letter-spacing: -0.5px;
}

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

.nav-links a {
    text-decoration: none;
    color: var(--gray);
    font-weight: 500;
    font-size: 15px;
    transition: color 0.3s ease;
    position: relative;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-1);
    transition: width 0.3s ease;
}

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

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.hamburger span {
    width: 24px;
    height: 2px;
    background: var(--dark);
    transition: all 0.3s ease;
}

/* Hero 区域 */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 72px;
    background: linear-gradient(180deg, var(--light) 0%, var(--white) 100%);
    position: relative;
    overflow: hidden;
}

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

.hero-content h1 {
    font-size: 56px;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -1.5px;
}

.hero-content h1 .highlight {
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--gray);
    margin-bottom: 40px;
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    gap: 16px;
}

/* AI搜索框 */
.hero-ai-search {
    margin: 32px 0;
    max-width: 600px;
}

.ai-search-box {
    display: flex;
    align-items: center;
    background: white;
    border-radius: 50px;
    padding: 6px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    border: 2px solid transparent;
    transition: all 0.3s ease;
}

.ai-search-box:focus-within {
    border-color: #0ea5e9;
    box-shadow: 0 4px 30px rgba(14, 165, 233, 0.2);
}

.ai-search-icon {
    font-size: 20px;
    margin: 0 12px 0 16px;
}

.ai-search-box input {
    flex: 1;
    border: none;
    background: transparent;
    padding: 12px 0;
    font-size: 15px;
    outline: none;
    color: #334155;
}

.ai-search-box input::placeholder {
    color: #94a3b8;
}

.ai-search-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: linear-gradient(135deg, #0ea5e9 0%, #06b6d4 100%);
    color: white;
    border: none;
    border-radius: 25px;
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.ai-search-btn:hover {
    transform: translateX(2px);
    box-shadow: 0 4px 15px rgba(14, 165, 233, 0.4);
}

.ai-search-btn svg {
    width: 18px;
    height: 18px;
}

.ai-search-hints {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 12px;
    flex-wrap: wrap;
    font-size: 13px;
}

.ai-search-hints span {
    color: #64748b;
}

.ai-search-hints button {
    padding: 6px 12px;
    background: rgba(255, 255, 255, 0.8);
    border: 1px solid #e2e8f0;
    border-radius: 16px;
    font-size: 12px;
    color: #475569;
    cursor: pointer;
    transition: all 0.2s ease;
}

.ai-search-hints button:hover {
    background: #0ea5e9;
    border-color: #0ea5e9;
    color: white;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 15px;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--gradient-1);
    color: var(--white);
    box-shadow: 0 4px 14px rgba(14, 165, 233, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(14, 165, 233, 0.5);
}

.btn-secondary {
    background: var(--white);
    color: var(--dark);
    border: 2px solid var(--light);
}

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

.btn-full {
    width: 100%;
}

/* Hero 视觉 */
.hero-visual {
    position: relative;
    width: 400px;
    height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.tech-ring {
    position: absolute;
    width: 300px;
    height: 300px;
    border: 2px solid rgba(14, 165, 233, 0.2);
    border-radius: 50%;
    animation: rotate 20s linear infinite;
}

.tech-ring::before {
    content: '';
    position: absolute;
    top: -5px;
    left: 50%;
    width: 10px;
    height: 10px;
    background: var(--primary);
    border-radius: 50%;
    transform: translateX(-50%);
    box-shadow: 0 0 20px var(--primary);
}

.ring-2 {
    width: 220px;
    height: 220px;
    border-color: rgba(6, 182, 212, 0.3);
    animation: rotate 15s linear infinite reverse;
}

.ring-3 {
    width: 140px;
    height: 140px;
    border-color: rgba(20, 184, 166, 0.4);
    animation: rotate 10s linear infinite;
}

.center-glow {
    width: 80px;
    height: 80px;
    background: var(--gradient-1);
    border-radius: 50%;
    box-shadow: 0 0 60px rgba(14, 165, 233, 0.5);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.1); opacity: 0.8; }
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
}

.scroll-indicator span {
    display: block;
    width: 24px;
    height: 40px;
    border: 2px solid var(--gray-light);
    border-radius: 12px;
    position: relative;
}

.scroll-indicator span::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    width: 4px;
    height: 8px;
    background: var(--primary);
    border-radius: 2px;
    transform: translateX(-50%);
    animation: scroll 2s ease-in-out infinite;
}

@keyframes scroll {
    0%, 100% { top: 8px; opacity: 1; }
    50% { top: 20px; opacity: 0; }
}

/* 统计数据 */
.stats {
    padding: 80px 0;
    background: var(--dark);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 48px;
    font-weight: 700;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
}

.stat-label {
    color: var(--gray-light);
    font-size: 15px;
}

/* 通用 section 样式 */
section {
    padding: 100px 0;
}

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

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(14, 165, 233, 0.1);
    color: var(--primary);
    font-size: 13px;
    font-weight: 600;
    border-radius: 20px;
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.section-header h2 {
    font-size: 40px;
    font-weight: 700;
    margin-bottom: 16px;
    letter-spacing: -1px;
}

.section-header p {
    font-size: 18px;
    color: var(--gray);
    max-width: 600px;
    margin: 0 auto;
}

/* 产品区域 */
.products {
    background: var(--light);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.product-card {
    background: var(--white);
    border-radius: 16px;
    padding: 40px 32px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.product-card.featured {
    border: 2px solid var(--primary);
    position: relative;
}

.product-card.featured::before {
    content: '热门';
    position: absolute;
    top: 16px;
    right: 16px;
    padding: 4px 12px;
    background: var(--gradient-1);
    color: var(--white);
    font-size: 12px;
    font-weight: 600;
    border-radius: 12px;
}

.product-icon {
    width: 64px;
    height: 64px;
    background: rgba(14, 165, 233, 0.1);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    color: var(--primary);
}

.product-icon svg {
    width: 32px;
    height: 32px;
}

.product-card h3 {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 12px;
}

.product-card > p {
    color: var(--gray);
    font-size: 15px;
    margin-bottom: 24px;
    line-height: 1.6;
}

.feature-list {
    list-style: none;
}

.feature-list li {
    padding: 8px 0;
    padding-left: 24px;
    position: relative;
    font-size: 14px;
    color: var(--dark-light);
}

.feature-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: 700;
}

/* 解决方案 */
.solutions {
    background: var(--white);
}

.solutions-timeline {
    max-width: 800px;
    margin: 0 auto;
}

.solution-item {
    display: flex;
    gap: 40px;
    padding: 40px 0;
    border-bottom: 1px solid var(--light);
}

.solution-item:last-child {
    border-bottom: none;
}

.solution-number {
    font-size: 48px;
    font-weight: 700;
    color: var(--primary);
    opacity: 0.3;
    line-height: 1;
    min-width: 80px;
}

.solution-content h3 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 8px;
}

.solution-content p {
    color: var(--gray);
    font-size: 16px;
}

/* 应用场景 */
.scenarios {
    background: var(--light);
}

.scenarios-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.scenario-card {
    position: relative;
    border-radius: 16px;
    padding: 32px;
    min-height: 200px;
    overflow: hidden;
    color: var(--white);
    transition: transform 0.3s ease;
}

.scenario-card:hover {
    transform: translateY(-4px);
}

.scenario-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
}

.scenario-card h3 {
    position: relative;
    z-index: 1;
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 8px;
}

.scenario-card p {
    position: relative;
    z-index: 1;
    font-size: 14px;
    opacity: 0.9;
}

/* 关于我们 */
.about {
    background: var(--white);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-content h2 {
    font-size: 40px;
    font-weight: 700;
    margin-bottom: 24px;
    letter-spacing: -1px;
}

.about-content > p {
    color: var(--gray);
    font-size: 16px;
    margin-bottom: 16px;
    line-height: 1.7;
}

.about-values {
    display: flex;
    gap: 24px;
    margin-top: 32px;
}

.value-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    font-size: 14px;
}

.value-icon {
    color: var(--primary);
}

.about-visual {
    display: flex;
    justify-content: center;
}

.about-card {
    background: var(--dark);
    border-radius: 16px;
    overflow: hidden;
    width: 100%;
    max-width: 400px;
    box-shadow: var(--shadow-xl);
}

.about-card-header {
    display: flex;
    gap: 8px;
    padding: 16px;
    background: rgba(255, 255, 255, 0.05);
}

.about-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #ff5f57;
}

.about-dot:nth-child(2) {
    background: #febc2e;
}

.about-dot:nth-child(3) {
    background: #28c840;
}

.about-card-content {
    padding: 24px;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 14px;
}

.code-line {
    color: var(--gray-light);
    margin: 4px 0;
}

.code-line.indent {
    padding-left: 20px;
}

.code-comment {
    color: #6a9955;
}

.code-keyword {
    color: #569cd6;
}

.code-var {
    color: #9cdcfe;
}

.code-key {
    color: #9cdcfe;
}

.code-string {
    color: #ce9178;
}

/* 联系我们 */
.contact {
    background: var(--light);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
}

.contact-info h2 {
    font-size: 40px;
    font-weight: 700;
    margin-bottom: 16px;
}

.contact-info > p {
    color: var(--gray);
    font-size: 16px;
    margin-bottom: 40px;
}

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

.contact-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.contact-label {
    font-size: 13px;
    color: var(--gray);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.contact-value {
    font-size: 16px;
    font-weight: 500;
    color: var(--dark);
}

/* 联系表单 */
.contact-form-wrapper {
    background: var(--white);
    border-radius: 16px;
    padding: 40px;
    box-shadow: var(--shadow);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 6px;
    color: var(--dark);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--light);
    border-radius: 8px;
    font-size: 15px;
    font-family: inherit;
    transition: border-color 0.3s ease;
    background: var(--white);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

/* 页脚 */
.footer {
    background: var(--dark);
    color: var(--white);
    padding: 80px 0 40px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 60px;
}

.footer-brand .logo-text {
    color: var(--white);
}

.footer-brand p {
    margin-top: 16px;
    color: var(--gray-light);
    font-size: 14px;
}

.footer-links h4 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

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

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: var(--gray-light);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s ease;
}

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

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 40px;
    text-align: center;
}

.footer-bottom p {
    color: var(--gray);
    font-size: 13px;
    margin: 4px 0;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-visual {
        display: none;
    }
    
    .hero-content h1 {
        font-size: 42px;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .products-grid,
    .scenarios-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .about-grid,
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 60px;
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .hamburger {
        display: flex;
    }
    
    .hero-content h1 {
        font-size: 32px;
    }
    
    .hero-ai-search {
        margin: 24px 0;
    }
    
    .ai-search-box {
        flex-direction: column;
        padding: 12px;
        border-radius: 16px;
    }
    
    .ai-search-box input {
        width: 100%;
        padding: 8px 0;
        text-align: center;
    }
    
    .ai-search-btn {
        width: 100%;
        justify-content: center;
        margin-top: 8px;
    }
    
    .ai-search-hints {
        justify-content: center;
    }
    
    .section-header h2 {
        font-size: 28px;
    }
    
    .products-grid,
    .scenarios-grid,
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .solution-item {
        flex-direction: column;
        gap: 16px;
    }
    
    .about-values {
        flex-direction: column;
        gap: 12px;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .contact-form-wrapper {
        padding: 24px;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
}

/* 动画 */
@media (prefers-reduced-motion: no-preference) {
    .product-card,
    .scenario-card {
        opacity: 0;
        transform: translateY(20px);
        animation: fadeInUp 0.6s ease forwards;
    }
    
    .product-card:nth-child(1) { animation-delay: 0.1s; }
    .product-card:nth-child(2) { animation-delay: 0.2s; }
    .product-card:nth-child(3) { animation-delay: 0.3s; }
    
    @keyframes fadeInUp {
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }
}

/* ============================================
   下载中心样式
   ============================================ */
.downloads {
    background: var(--white);
}

.downloads-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.download-category {
    background: var(--light);
    border-radius: 16px;
    padding: 32px;
}

.download-category-title {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 24px;
    color: var(--dark);
}

.category-icon {
    font-size: 24px;
}

.download-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.download-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--white);
    border-radius: 12px;
    padding: 16px;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 1px solid transparent;
}

.download-item:hover {
    border-color: var(--primary);
    transform: translateX(4px);
}

.download-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.download-name {
    font-size: 14px;
    font-weight: 500;
    color: var(--dark);
}

.download-meta {
    font-size: 12px;
    color: var(--gray);
}

.download-btn {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: var(--gradient-1);
    border: none;
    color: var(--white);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.3s ease;
}

.download-btn:hover {
    transform: scale(1.1);
}

.download-btn svg {
    width: 18px;
    height: 18px;
}

.downloads-notice {
    text-align: center;
    margin-top: 40px;
    padding: 20px;
    background: rgba(14, 165, 233, 0.05);
    border-radius: 12px;
}

.downloads-notice p {
    color: var(--gray);
    font-size: 14px;
}

.downloads-notice a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
}

.downloads-notice a:hover {
    text-decoration: underline;
}

/* ============================================
   社交媒体链接样式
   ============================================ */
.social-links {
    display: flex;
    gap: 12px;
    margin-top: 20px;
}

.social-link {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-light);
    transition: all 0.3s ease;
    text-decoration: none;
    position: relative;
}

.social-link:hover {
    background: var(--primary);
    color: var(--white);
    transform: translateY(-2px);
}

.social-link svg {
    width: 18px;
    height: 18px;
}

.social-link.wechat {
    position: relative;
}

.social-link.wechat:hover .wechat-qr {
    display: block;
}

.wechat-qr {
    display: none;
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--white);
    color: var(--dark);
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 12px;
    white-space: nowrap;
    margin-bottom: 8px;
    box-shadow: var(--shadow);
}

.wechat-qr::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-top-color: var(--white);
}

/* ============================================
   表单消息样式
   ============================================ */
.form-message {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    border-radius: 12px;
    margin-bottom: 20px;
    animation: slideIn 0.3s ease;
}

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

.form-message-success {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: #059669;
}

.form-message-error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #dc2626;
}

.form-message-warning {
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid rgba(245, 158, 11, 0.3);
    color: #d97706;
}

.form-message-icon {
    font-size: 18px;
    font-weight: 700;
}

.form-message-text {
    font-size: 14px;
    line-height: 1.5;
}

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

@media (max-width: 768px) {
    .downloads-grid {
        grid-template-columns: 1fr;
    }
    
    .download-category {
        padding: 24px;
    }
}