/* ============ 基础样式 ============ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --secondary-color: #8b5cf6;
    --accent-color: #06b6d4;
    --bg-dark: #0f0f1a;
    --bg-darker: #080810;
    --text-light: #f8fafc;
    --text-gray: #94a3b8;
    --gradient-1: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    --gradient-2: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
    --gradient-3: linear-gradient(135deg, #f43f5e 0%, #ec4899 100%);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-light);
    line-height: 1.6;
    overflow-x: hidden;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

ul {
    list-style: none;
}

/* ============ 导航栏 ============ */
.tech-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(15, 15, 26, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(99, 102, 241, 0.1);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 30px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

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

.logo-icon {
    width: 36px;
    height: 36px;
    background: var(--gradient-1);
    border-radius: 8px;
    position: relative;
}

.logo-icon::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 18px;
    height: 18px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 4px;
}

.logo-text {
    font-size: 24px;
    font-weight: 700;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    gap: 40px;
}

.nav-link {
    font-size: 15px;
    font-weight: 500;
    color: var(--text-gray);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-1);
    transition: width 0.3s ease;
}

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

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

.nav-auth {
    display: none;
}

.btn-signin,
.btn-signup {
    padding: 10px 24px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-signin {
    color: var(--text-light);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-signin:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.3);
}

.btn-signup {
    background: var(--gradient-1);
    color: white;
    border: none;
}

.btn-signup:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(99, 102, 241, 0.3);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    width: 30px;
}

.nav-toggle span {
    width: 100%;
    height: 2px;
    background: var(--text-light);
    transition: all 0.3s ease;
}

/* ============ 主视觉区域 ============ */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: 80px;
    padding-left: 80px;
    padding-right: 80px;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: -1;
}

.grid-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        linear-gradient(rgba(99, 102, 241, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(99, 102, 241, 0.05) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: gridMove 20s linear infinite;
}

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

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
}

.orb-1 {
    width: 600px;
    height: 600px;
    background: var(--gradient-1);
    top: -200px;
    right: -200px;
    animation: orbFloat 8s ease-in-out infinite;
}

.orb-2 {
    width: 400px;
    height: 400px;
    background: var(--gradient-2);
    bottom: -100px;
    left: -100px;
    animation: orbFloat 10s ease-in-out infinite reverse;
}

.orb-3 {
    width: 300px;
    height: 300px;
    background: var(--gradient-3);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation: orbFloat 12s ease-in-out infinite;
}

@keyframes orbFloat {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(30px, -30px) scale(1.1); }
}

.shooting-stars {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    pointer-events: none;
    z-index: 6;
}

.shooting-star {
    position: absolute;
    width: 2px;
    height: 2px;
    background: #fff;
    border-radius: 50%;
    box-shadow: 0 0 8px 3px rgba(255, 255, 255, 0.7),
                0 0 16px 6px rgba(99, 102, 241, 0.4);
}

.shooting-star::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 150px;
    height: 1px;
    background: linear-gradient(90deg, rgba(255, 255, 255, 0.9), rgba(255, 255, 255, 0.2) 50%, transparent);
}

.shooting-star::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 80px;
    height: 1px;
    background: linear-gradient(90deg, rgba(99, 102, 241, 0.7), rgba(99, 102, 241, 0.1) 60%, transparent);
}

.star-1 {
    top: 8%;
    right: 8%;
    animation: shooting1 2.5s linear infinite;
}

.star-2 {
    top: 22%;
    right: 18%;
    animation: shooting2 3s linear infinite 0.6s;
}

.star-3 {
    top: 38%;
    right: 6%;
    animation: shooting3 3.5s linear infinite 1.2s;
}

.star-4 {
    top: 52%;
    right: 22%;
    animation: shooting1 3s linear infinite 1.8s;
}

.star-5 {
    top: 68%;
    right: 12%;
    animation: shooting2 2.5s linear infinite 0.3s;
}

@keyframes shooting1 {
    0% {
        opacity: 0;
        transform: translate(0, 0) rotate(-45deg);
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        opacity: 0;
        transform: translate(-350px, 350px) rotate(-45deg);
    }
}

@keyframes shooting2 {
    0% {
        opacity: 0;
        transform: translate(0, 0) rotate(-45deg);
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        opacity: 0;
        transform: translate(-420px, 420px) rotate(-45deg);
    }
}

@keyframes shooting3 {
    0% {
        opacity: 0;
        transform: translate(0, 0) rotate(-45deg);
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        opacity: 0;
        transform: translate(-300px, 300px) rotate(-45deg);
    }
}

.hero-content {
    position: relative;
    z-index: 10;
}

.hero-badge {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: 50px;
    font-size: 14px;
    color: var(--primary-color);
    margin-bottom: 30px;
}

.hero-title {
    font-size: 64px;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 20px;
}

.title-gradient {
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-gray);
    max-width: 600px;
    margin-bottom: 40px;
}

.hero-actions {
    display: flex;
    gap: 20px;
    margin-bottom: 60px;
}

.btn {
    padding: 16px 40px;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.btn-primary {
    background: var(--gradient-1);
    color: white;
    border: none;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 20px 40px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--text-light);
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
    border-color: rgba(255, 255, 255, 0.4);
    background: rgba(255, 255, 255, 0.05);
}

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

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

.stat-number {
    font-size: 48px;
    font-weight: 800;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 48px;
    font-weight: 800;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-desc {
    font-size: 14px;
    color: var(--text-gray);
    margin-top: 5px;
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    color: var(--text-gray);
    font-size: 14px;
}

.scroll-indicator span {
    display: block;
    margin-bottom: 10px;
}

.scroll-arrow {
    width: 24px;
    height: 24px;
    margin: 0 auto;
    border-right: 2px solid currentColor;
    border-bottom: 2px solid currentColor;
    transform: rotate(45deg);
    animation: scrollBounce 2s infinite;
}

@keyframes scrollBounce {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* ============ 通用区块样式 ============ */
section {
    padding: 120px 0;
    position: relative;
}

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

.section-badge {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: 50px;
    font-size: 12px;
    font-weight: 600;
    color: var(--primary-color);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 20px;
}

.section-title {
    font-size: 42px;
    font-weight: 800;
    margin-bottom: 15px;
}

.section-subtitle {
    font-size: 16px;
    color: var(--text-gray);
    max-width: 500px;
    margin: 0 auto;
}

/* ============ 产品服务 ============ */
.products-section {
    background: var(--bg-darker);
}

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

.product-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 20px;
    padding: 40px 30px;
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-1);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.product-card:hover {
    transform: translateY(-10px);
    border-color: rgba(99, 102, 241, 0.3);
}

.product-card:hover::before {
    opacity: 0.05;
}

.card-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 25px;
    position: relative;
    z-index: 1;
}

.card-icon svg {
    width: 28px;
    height: 28px;
    stroke: white;
}

.card-title {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 15px;
    position: relative;
    z-index: 1;
}

.card-desc {
    font-size: 15px;
    color: var(--text-gray);
    margin-bottom: 25px;
    line-height: 1.7;
    position: relative;
    z-index: 1;
}

.card-link {
    font-size: 15px;
    font-weight: 600;
    color: var(--primary-color);
    display: inline-flex;
    align-items: center;
    gap: 5px;
    position: relative;
    z-index: 1;
    transition: all 0.3s ease;
}

.card-link:hover {
    gap: 10px;
    color: var(--accent-color);
}

/* ============ 核心技术 ============ */
.technology-section {
    position: relative;
    overflow: hidden;
}

.tech-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at center, rgba(99, 102, 241, 0.1) 0%, transparent 70%);
}

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

.tech-visual {
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    height: 400px;
}

.tech-ring {
    position: absolute;
    border: 2px solid rgba(99, 102, 241, 0.2);
    border-radius: 50%;
    animation: ringSpin 20s linear infinite;
}

.ring-1 {
    width: 300px;
    height: 300px;
}

.ring-2 {
    width: 240px;
    height: 240px;
    animation-duration: 15s;
    animation-direction: reverse;
}

.ring-3 {
    width: 180px;
    height: 180px;
    animation-duration: 10s;
}

@keyframes ringSpin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.tech-center {
    text-align: center;
    z-index: 1;
}

.tech-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 15px;
    background: var(--gradient-1);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.tech-icon svg {
    width: 40px;
    height: 40px;
    stroke: white;
}

.tech-label {
    font-size: 18px;
    font-weight: 600;
}

.tech-list {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.tech-item {
    width: 100%;
}

.item-label {
    display: flex;
    justify-content: space-between;
    margin-bottom: 10px;
    font-size: 16px;
}

.label-text {
    font-weight: 600;
}

.label-value {
    color: var(--primary-color);
    font-weight: 700;
}

.item-bar {
    height: 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    overflow: hidden;
}

.bar-fill {
    height: 100%;
    background: var(--gradient-1);
    border-radius: 10px;
    width: var(--progress);
    animation: barFill 2s ease-out forwards;
}

@keyframes barFill {
    0% { width: 0; }
}

.tech-item {
    margin-bottom: 25px;
}

.item-label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
    font-size: 16px;
}

.label-text {
    font-weight: 600;
}

.label-icon {
    color: var(--primary-color);
    font-weight: 700;
    font-size: 18px;
}

.item-desc {
    font-size: 14px;
    color: var(--text-gray);
}

/* ============ 关于我们 ============ */
.about-section {
    background: var(--bg-darker);
}

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

.about-content {
    padding-right: 40px;
}

.about-text p {
    color: var(--text-gray);
    margin-bottom: 20px;
    line-height: 1.8;
}

.about-features {
    display: flex;
    gap: 20px;
    margin-top: 30px;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    font-weight: 600;
}

.feature-icon {
    width: 32px;
    height: 32px;
    background: rgba(99, 102, 241, 0.1);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
}

.feature-icon svg {
    width: 18px;
    height: 18px;
}

.about-image {
    position: relative;
}

.tech-visual-container {
    position: relative;
    height: 380px;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.05) 0%, rgba(139, 92, 246, 0.03) 100%);
    border-radius: 20px;
    overflow: hidden;
    border: 1px solid rgba(99, 102, 241, 0.1);
}

.tech-grid-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        linear-gradient(rgba(99, 102, 241, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(99, 102, 241, 0.03) 1px, transparent 1px);
    background-size: 30px 30px;
    animation: gridMove 20s linear infinite;
}

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

.tech-particles {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--primary-color);
    border-radius: 50%;
    animation: particleFloat 6s ease-in-out infinite;
}

.particle:nth-child(1) { top: 15%; left: 20%; animation-delay: 0s; }
.particle:nth-child(2) { top: 25%; left: 75%; animation-delay: 1s; }
.particle:nth-child(3) { top: 45%; left: 15%; animation-delay: 2s; }
.particle:nth-child(4) { top: 55%; left: 85%; animation-delay: 3s; }
.particle:nth-child(5) { top: 75%; left: 30%; animation-delay: 4s; }
.particle:nth-child(6) { top: 35%; left: 65%; animation-delay: 5s; }
.particle:nth-child(7) { top: 65%; left: 45%; animation-delay: 2.5s; }
.particle:nth-child(8) { top: 85%; left: 70%; animation-delay: 4.5s; }

@keyframes particleFloat {
    0%, 100% { opacity: 0.3; transform: translate(0, 0); }
    50% { opacity: 1; transform: translate(10px, -15px); }
}

.tech-circles {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.tech-circle {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: 50%;
}

.circle-1 {
    width: 200px;
    height: 200px;
    animation: circlePulse 3s ease-in-out infinite;
}

.circle-2 {
    width: 160px;
    height: 160px;
    animation: circlePulse 3s ease-in-out infinite 1s;
}

.circle-3 {
    width: 120px;
    height: 120px;
    animation: circlePulse 3s ease-in-out infinite 2s;
}

@keyframes circlePulse {
    0%, 100% { opacity: 0.3; transform: translate(-50%, -50%) scale(1); }
    50% { opacity: 0.6; transform: translate(-50%, -50%) scale(1.05); }
}

.tech-hexagon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 120px;
    height: 120px;
    animation: hexRotate 20s linear infinite;
}

@keyframes hexRotate {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(360deg); }
}

.tech-hexagon svg {
    width: 100%;
    height: 100%;
}

.hex-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 40px;
    height: 40px;
    background: var(--gradient-1);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: iconFloat 3s ease-in-out infinite;
}

.hex-content svg {
    width: 22px;
    height: 22px;
    stroke: white;
}

@keyframes iconFloat {
    0%, 100% { transform: translate(-50%, -50%) translateY(0); }
    50% { transform: translate(-50%, -50%) translateY(-5px); }
}

.tech-lines {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}

.tech-line {
    position: absolute;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary-color), transparent);
    animation: lineScan 3s linear infinite;
}

.line-1 {
    top: 30%;
    left: 10%;
    right: 10%;
    animation-delay: 0s;
}

.line-2 {
    top: 50%;
    left: 15%;
    right: 15%;
    animation-delay: 1s;
}

.line-3 {
    top: 70%;
    left: 10%;
    right: 10%;
    animation-delay: 2s;
}

.line-4 {
    top: 85%;
    left: 20%;
    right: 20%;
    animation-delay: 0.5s;
}

@keyframes lineScan {
    0% { opacity: 0; transform: translateX(-100%); }
    50% { opacity: 1; }
    100% { opacity: 0; transform: translateX(100%); }
}

.connecting-dots {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}

.connect-dot {
    position: absolute;
    width: 6px;
    height: 6px;
    background: var(--accent-color);
    border-radius: 50%;
    animation: connectPulse 2s ease-in-out infinite;
}

.dot-a { top: 25%; left: 30%; animation-delay: 0s; }
.dot-b { top: 35%; left: 70%; animation-delay: 0.5s; }
.dot-c { top: 65%; left: 25%; animation-delay: 1s; }
.dot-d { top: 75%; left: 65%; animation-delay: 1.5s; }

@keyframes connectPulse {
    0%, 100% { opacity: 0.4; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.3); }
}

/* ============ 联系我们 ============ */
.contact-section {
    position: relative;
    overflow: hidden;
}

.contact-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at center, rgba(99, 102, 241, 0.05) 0%, transparent 70%);
}

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

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.info-item {
    display: flex;
    gap: 20px;
}

.info-icon {
    width: 50px;
    height: 50px;
    background: var(--gradient-1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.info-icon svg {
    width: 24px;
    height: 24px;
    stroke: white;
}

.info-content h4 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
}

.info-content p {
    color: var(--text-gray);
}

.contact-form {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 20px;
    padding: 40px;
}

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

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 16px 20px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    color: var(--text-light);
    font-size: 15px;
    transition: all 0.3s ease;
}

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

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.05);
}

.contact-form textarea {
    resize: vertical;
    min-height: 120px;
}

.btn-submit {
    width: 100%;
    padding: 16px 40px;
    background: var(--gradient-1);
    border: none;
    border-radius: 10px;
    color: white;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(99, 102, 241, 0.3);
}

.contact-promo {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 20px;
    padding: 50px 40px;
    text-align: center;
}

.promo-content h3 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 20px;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.promo-content > p {
    font-size: 16px;
    color: var(--text-gray);
    line-height: 1.8;
    margin-bottom: 40px;
}

.promo-message {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    padding: 20px;
    background: rgba(139, 92, 246, 0.05);
    border-radius: 12px;
    border: 1px solid rgba(139, 92, 246, 0.1);
}

.promo-message svg {
    width: 24px;
    height: 24px;
    color: var(--secondary-color);
    flex-shrink: 0;
}

.promo-message p {
    font-size: 15px;
    color: var(--text-light);
    font-weight: 500;
}

/* ============ 页脚 ============ */
.tech-footer {
    background: var(--bg-darker);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding: 80px 80px 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    margin-bottom: 60px;
}

.footer-section h4 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 25px;
    text-align: center;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.footer-logo .logo-icon {
    flex-shrink: 0;
}

.footer-logo .logo-text {
    font-size: 18px;
    font-weight: 700;
}

.footer-desc {
    color: var(--text-gray);
    font-size: 15px;
    line-height: 1.8;
}

.footer-section ul {
    display: flex;
    flex-direction: column;
    gap: 15px;
    align-items: center;
}

.footer-section ul li a {
    color: var(--text-gray);
    font-size: 15px;
    transition: all 0.3s ease;
}

.footer-section ul li a:hover {
    color: var(--primary-color);
}

.social-links {
    display: flex;
    gap: 15px;
    justify-content: center;
}

.social-link {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.social-link:hover {
    background: var(--gradient-1);
    transform: translateY(-3px);
}

.social-link svg {
    width: 20px;
    height: 20px;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding-top: 30px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.footer-bottom p {
    color: var(--text-gray);
    font-size: 14px;
    margin: 0;
}

.footer-bottom a {
    color: var(--text-gray);
    font-size: 14px;
}

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

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

    .technology-content,
    .about-grid,
    .contact-wrapper {
        grid-template-columns: 1fr;
    }

    .about-content {
        padding-right: 0;
    }

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

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

@media (max-width: 768px) {
    .nav-menu,
    .nav-auth {
        display: none;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-menu.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 80px;
        left: 0;
        right: 0;
        background: var(--bg-darker);
        padding: 30px;
        gap: 20px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    .hero-section {
        padding-left: 20px;
        padding-right: 20px;
    }

    .hero-title {
        font-size: 42px;
    }

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

    .hero-actions {
        flex-direction: column;
    }

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

    .section-title {
        font-size: 32px;
    }

    .tech-visual {
        height: 300px;
    }

    .tech-visual-container {
        height: 300px;
    }

    .about-features {
        flex-wrap: wrap;
    }

    .contact-wrapper {
        gap: 40px;
    }

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

    .social-links {
        justify-content: center;
    }

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

@media (max-width: 480px) {
    .nav-container {
        padding: 0 15px;
    }

    .container {
        padding: 0 15px;
    }

    section {
        padding: 80px 0;
    }
}