/* ===== 基础变量 ===== */
:root {
    --primary: #07C79C;
    --primary-dark: #109594;
    --secondary: #28007B;
    --accent: #02F9A5;
    --bg-dark: #ffffff;
    --bg-card: #f8fafc;
    --bg-card-hover: #f1f5f9;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --border: rgba(0, 0, 0, 0.08);
    --border-hover: rgba(0, 0, 0, 0.15);
    --gradient-primary: linear-gradient(135deg, #07C79C 0%, #28007B 100%);
    --gradient-glow: radial-gradient(circle, rgba(7, 199, 156, 0.15) 0%, transparent 70%);
    --shadow-glow: 0 0 40px rgba(7, 199, 156, 0.3);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== 重置样式 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

/* ===== 容器 ===== */
.container {
    max-width: 1280px;
    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(20px);
    border-bottom: 1px solid var(--border);
    transition: var(--transition);
}

.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 0 0 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.25rem;
    margin-left: -40px;
}

.logo img {
    height: 72px;
    width: auto;
    display: block;
}

.logo-icon {
    color: var(--primary);
    font-size: 1.5rem;
}



.nav-menu {
    display: flex;
    gap: 32px;
}

.nav-link {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition);
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition);
}

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

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

.bar {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition);
}

/* ===== 按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: #ffffff;
    box-shadow: 0 4px 20px rgba(7, 199, 156, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(7, 199, 156, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-hover);
}

.btn-secondary:hover {
    border-color: var(--primary);
    background: rgba(7, 199, 156, 0.05);
}

.btn-full {
    width: 100%;
}

/* ===== 区域标题 ===== */
.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(7, 199, 156, 0.1);
    border: 1px solid rgba(7, 199, 156, 0.2);
    border-radius: 100px;
    color: var(--primary);
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 16px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 16px;
    line-height: 1.2;
}

.section-desc {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.subsection-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 32px;
    text-align: center;
}

/* ===== 英雄区域 ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding-top: 72px;
    background: linear-gradient(135deg, #f0fdf4 0%, #e0f2fe 50%, #faf5ff 100%);
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.grid-overlay {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(7, 199, 156, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(7, 199, 156, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 40%, transparent 80%);
}

.glow-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
    animation: float 8s ease-in-out infinite;
}

.orb-1 {
    width: 400px;
    height: 400px;
    background: var(--primary);
    top: -100px;
    right: -100px;
    animation-delay: 0s;
}

.orb-2 {
    width: 300px;
    height: 300px;
    background: var(--secondary);
    bottom: -50px;
    left: -50px;
    animation-delay: -3s;
}

.orb-3 {
    width: 250px;
    height: 250px;
    background: var(--accent);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: -5s;
    opacity: 0.2;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -30px) scale(1.1); }
    66% { transform: translate(-20px, 20px) scale(0.9); }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
    padding: 0 24px;
}

.hero-badge {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(7, 199, 156, 0.1);
    border: 1px solid rgba(7, 199, 156, 0.3);
    border-radius: 100px;
    color: var(--primary);
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 32px;
    animation: fadeInUp 0.8s ease-out;
}

.hero-title {
    font-size: 4rem;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 24px;
}

.title-line {
    display: block;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.title-line.highlight {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation-delay: 0.4s;
}

.hero-desc {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 40px;
    animation: fadeInUp 0.8s ease-out 0.6s both;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 64px;
    animation: fadeInUp 0.8s ease-out 0.8s both;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 48px;
    animation: fadeInUp 0.8s ease-out 1s both;
}

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

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 900;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
    font-size: 0.8rem;
    animation: bounce 2s infinite;
}

.mouse {
    width: 24px;
    height: 40px;
    border: 2px solid var(--text-muted);
    border-radius: 12px;
    display: flex;
    justify-content: center;
    padding-top: 8px;
}

.wheel {
    width: 4px;
    height: 8px;
    background: var(--primary);
    border-radius: 2px;
    animation: scroll 2s infinite;
}

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

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-10px); }
    60% { transform: translateX(-50%) translateY(-5px); }
}

@keyframes scroll {
    0% { opacity: 1; transform: translateY(0); }
    100% { opacity: 0; transform: translateY(12px); }
}

/* ===== 双核心业务 ===== */
.dual-core {
    padding: 120px 0;
    background: linear-gradient(180deg, var(--bg-dark) 0%, var(--bg-card) 100%);
}

.dual-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.dual-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 48px 40px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.dual-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    opacity: 0;
    transition: var(--transition);
}

.dual-card.ai::before {
    background: linear-gradient(90deg, #07C79C, #28007B);
}

.dual-card.security::before {
    background: linear-gradient(90deg, #02F9A5, #07C79C);
}

.dual-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-6px);
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.1);
}

.dual-card:hover::before {
    opacity: 1;
}

.dual-icon {
    width: 72px;
    height: 72px;
    color: var(--primary);
    margin-bottom: 28px;
}

.dual-icon svg {
    width: 100%;
    height: 100%;
}

.dual-card h3 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.dual-card > p {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: 28px;
    line-height: 1.7;
}

.dual-features {
    margin-bottom: 28px;
}

.dual-features li {
    padding: 10px 0;
    color: var(--text-secondary);
    font-size: 0.95rem;
    position: relative;
    padding-left: 24px;
    border-bottom: 1px solid var(--border);
}

.dual-features li:last-child {
    border-bottom: none;
}

.dual-features li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: 700;
}

.dual-link {
    color: var(--primary);
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.dual-link:hover {
    color: var(--accent);
    gap: 12px;
}

/* ===== AI智能体板块 ===== */
.ai-agent {
    padding: 120px 0;
    background: var(--bg-dark);
}

.ai-showcase {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 48px;
    margin-bottom: 64px;
}

.ai-content h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 32px;
    text-align: center;
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 48px;
}

.tech-item {
    text-align: center;
    padding: 32px 20px;
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: 16px;
    transition: var(--transition);
}

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

.tech-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.tech-item h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.tech-item p {
    color: var(--text-secondary);
    font-size: 0.85rem;
    line-height: 1.6;
}

.ai-architecture {
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 40px;
}

.ai-architecture h4 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 32px;
    text-align: center;
}

.arch-flow {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 24px;
    flex-wrap: wrap;
}

.arch-step {
    background: linear-gradient(135deg, rgba(7, 199, 156, 0.1), rgba(40, 0, 123, 0.1));
    border: 1px solid rgba(7, 199, 156, 0.2);
    border-radius: 12px;
    padding: 24px 32px;
    text-align: center;
    min-width: 140px;
}

.arch-label {
    display: block;
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--primary);
}

.arch-desc {
    display: block;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.arch-arrow {
    font-size: 1.5rem;
    color: var(--primary);
    font-weight: 700;
}

.ai-products {
    margin-top: 64px;
}

.ai-products-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.ai-product-card,
a.ai-product-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 36px 32px;
    transition: var(--transition);
    text-decoration: none;
    color: inherit;
    display: block;
}

a.ai-product-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: 0 16px 32px rgba(0, 0, 0, 0.1);
}

.ai-product-icon {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.ai-product-card h4 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.ai-product-card > p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.7;
    margin-bottom: 20px;
}

.ai-product-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.ai-product-tags span {
    padding: 4px 12px;
    background: rgba(7, 199, 156, 0.1);
    border: 1px solid rgba(7, 199, 156, 0.2);
    border-radius: 100px;
    font-size: 0.8rem;
    color: var(--primary);
}

a.ai-product-card::after {
    content: '查看详情 →';
    display: inline-block;
    margin-top: 16px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--primary);
    transition: var(--transition);
}

a.ai-product-card:hover::after {
    color: var(--primary-dark);
    letter-spacing: 1px;
}

/* ===== 数据安全治理板块 ===== */
.data-security {
    padding: 120px 0;
    background: linear-gradient(180deg, var(--bg-card) 0%, var(--bg-dark) 100%);
}

.security-products {
    display: grid;
    grid-template-columns: 1.2fr 1fr 1fr;
    gap: 24px;
}

.security-card,
a.security-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 40px 32px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    display: block;
}

a.security-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: var(--transition);
}

.security-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.security-card:hover::before {
    opacity: 1;
}

.security-card.primary {
    border-color: rgba(7, 199, 156, 0.2);
    background: linear-gradient(135deg, var(--bg-card) 0%, rgba(7, 199, 156, 0.05) 100%);
}

.security-icon {
    width: 64px;
    height: 64px;
    color: var(--primary);
    margin-bottom: 24px;
}

.security-icon svg {
    width: 100%;
    height: 100%;
}

.security-card h3 {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.security-card > p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 24px;
    line-height: 1.7;
}

.security-features {
    margin-bottom: 0;
}

.security-features li {
    padding: 8px 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
    position: relative;
    padding-left: 20px;
}

.security-features li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--primary);
}

a.security-card .security-features {
    margin-bottom: 16px;
}

a.security-card::after {
    content: '查看详情 →';
    display: inline-block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--primary);
    transition: var(--transition);
}

a.security-card:hover::after {
    color: var(--primary-dark);
    letter-spacing: 1px;
}

/* ===== 客户案例 ===== */
.cases {
    padding: 120px 0;
    background: var(--bg-dark);
}

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

.case-card,
a.case-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 32px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    display: block;
}

a.case-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.case-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 8px;
}

.case-tag {
    padding: 4px 12px;
    background: rgba(7, 199, 156, 0.1);
    border: 1px solid rgba(7, 199, 156, 0.2);
    border-radius: 100px;
    font-size: 0.8rem;
    color: var(--primary);
    font-weight: 500;
}

.case-award {
    font-size: 0.8rem;
    color: var(--accent);
}

.case-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 12px;
    line-height: 1.4;
}

.case-desc {
    color: var(--text-secondary);
    font-size: 0.85rem;
    line-height: 1.7;
    margin-bottom: 24px;
}

.case-metrics {
    display: flex;
    gap: 16px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
}

.case-metric {
    text-align: center;
    flex: 1;
}

.case-number {
    display: block;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 4px;
}

.case-label {
    font-size: 0.75rem;
    color: var(--text-muted);
}

a.case-card::after {
    content: '查看详情 →';
    display: inline-block;
    margin-top: 12px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--primary);
    transition: var(--transition);
}

a.case-card:hover::after {
    color: var(--primary-dark);
    letter-spacing: 1px;
}

/* ===== 资质荣誉 ===== */
.honors {
    padding: 120px 0;
    background: linear-gradient(180deg, var(--bg-dark) 0%, var(--bg-card) 100%);
}

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

.honor-category {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 36px 32px;
    transition: var(--transition);
}

.honor-category:hover {
    border-color: var(--border-hover);
}

.honor-category h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border);
    color: var(--primary);
}

.honor-category ul {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.honor-category li {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
    position: relative;
    padding-left: 20px;
}

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

/* ===== 关于我们 ===== */
.about {
    padding: 120px 0;
    background: var(--bg-dark);
}

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

.about-content .section-tag {
    margin-bottom: 16px;
}

.about-content .section-title {
    text-align: left;
    margin-bottom: 24px;
}

.about-content p {
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.8;
}

.about-highlights {
    display: flex;
    gap: 32px;
    margin: 32px 0;
}

.highlight {
    text-align: center;
}

.highlight-number {
    display: block;
    font-size: 2rem;
    font-weight: 900;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.highlight-text {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

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

.visual-card {
    width: 300px;
    height: 300px;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.visual-ring {
    position: absolute;
    width: 100%;
    height: 100%;
    border: 2px solid rgba(7, 199, 156, 0.2);
    border-radius: 50%;
    animation: rotate 20s linear infinite;
}

.visual-ring::before,
.visual-ring::after {
    content: '';
    position: absolute;
    border-radius: 50%;
    border: 2px solid transparent;
    border-top-color: var(--primary);
}

.visual-ring::before {
    inset: 20px;
    animation: rotate 15s linear infinite reverse;
}

.visual-ring::after {
    inset: 40px;
    animation: rotate 10s linear infinite;
}

.visual-core {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 50%;
    box-shadow: var(--shadow-glow);
    animation: pulse 3s 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; }
}

/* ===== 联系我们 ===== */
.contact {
    padding: 120px 0;
    background: linear-gradient(180deg, var(--bg-dark) 0%, var(--bg-card) 100%);
}

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

.contact-info .section-title {
    text-align: left;
}

.contact-info > p {
    color: var(--text-secondary);
    margin-bottom: 40px;
}

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

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

.contact-icon {
    width: 48px;
    height: 48px;
    background: rgba(7, 199, 156, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.contact-item strong {
    display: block;
    margin-bottom: 4px;
}

.contact-item span {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.contact-form-wrapper {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 40px;
}

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

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 14px 16px;
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(7, 199, 156, 0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-muted);
}

.form-group select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2394a3b8' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
}

.form-group select option {
    background: var(--bg-card);
    color: var(--text-primary);
}

/* ===== 页脚 ===== */
.footer {
    padding: 80px 0 0;
    background: var(--bg-dark);
    border-top: 1px solid var(--border);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
}

.footer-brand .logo {
    margin-bottom: 16px;
    margin-left: 40px;
}

.footer-brand .logo img {
    height: 120px;
    width: auto;
    display: block;
}

.footer-brand p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.7;
}

.footer-links h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    color: var(--text-secondary);
    font-size: 0.9rem;
    transition: var(--transition);
}

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

.footer-bottom {
    padding: 24px 0;
    border-top: 1px solid var(--border);
    text-align: center;
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.footer-bottom p.beian {
    margin-top: 8px;
}

.footer-bottom p.beian a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.2s;
}

.footer-bottom p.beian a:hover {
    color: var(--primary);
}

/* ===== 响应式设计 ===== */
@media (max-width: 1024px) {
    .dual-grid,
    .tech-grid,
    .security-products,
    .cases-grid,
    .honors-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .ai-products-grid {
        grid-template-columns: 1fr;
    }
    
    .about-grid,
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 72px;
        flex-direction: column;
        background: var(--bg-dark);
        width: 100%;
        text-align: center;
        transition: var(--transition);
        padding: 24px;
        gap: 24px;
        border-bottom: 1px solid var(--border);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hamburger {
        display: flex;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-stats {
        flex-wrap: wrap;
        gap: 24px;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .dual-grid,
    .tech-grid,
    .security-products,
    .cases-grid,
    .honors-grid,
    .ai-products-grid {
        grid-template-columns: 1fr;
    }
    
    .arch-flow {
        flex-direction: column;
    }
    
    .arch-arrow {
        transform: rotate(90deg);
    }
    
    .about-highlights {
        justify-content: center;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .section-title {
        font-size: 2rem;
    }
}

/* ===== 滚动动画 ===== */
.scroll-reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease-out;
}

.scroll-reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}