/* ==================== 基础重置与变量 ==================== */
:root {
    --primary: #1e3a8a;
    --primary-light: #3b82f6;
    --accent: #06b6d4;
    --accent-light: #22d3ee;
    --purple: #6366f1;
    --dark: #0f172a;
    --dark-2: #1e293b;
    --gray: #64748b;
    --gray-light: #94a3b8;
    --light: #f8fafc;
    --white: #ffffff;
    --gradient: linear-gradient(135deg, #1e3a8a 0%, #6366f1 50%, #06b6d4 100%);
    --gradient-2: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-3: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.08);
    --shadow-lg: 0 20px 60px rgba(0,0,0,0.12);
    --shadow-xl: 0 25px 80px rgba(30, 58, 138, 0.15);
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", 
                 "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    color: var(--dark);
    background: var(--white);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

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

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

ul {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

/* ==================== 导航栏 ==================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    border-bottom-color: rgba(0, 0, 0, 0.05);
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
}

.logo-icon {
    width: 42px;
    height: 42px;
    transition: var(--transition);
}

.logo:hover .logo-icon {
    transform: rotate(10deg) scale(1.05);
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-main {
    font-size: 18px;
    font-weight: 700;
    color: var(--dark);
    letter-spacing: 1px;
}

.logo-sub {
    font-size: 10px;
    color: var(--gray);
    letter-spacing: 2px;
    font-weight: 500;
}

.nav-menu {
    display: flex;
    gap: 8px;
}

.nav-link {
    padding: 8px 18px;
    border-radius: 100px;
    font-size: 15px;
    font-weight: 500;
    color: var(--dark-2);
    transition: var(--transition);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary);
    background: rgba(30, 58, 138, 0.08);
}

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

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--dark);
    border-radius: 2px;
    transition: var(--transition);
}

/* ==================== Hero 区域 ==================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 24px 80px;
    overflow: hidden;
    background: linear-gradient(135deg, #f0f4ff 0%, #e0e7ff 50%, #f0f9ff 100%);
}

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

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

.shape-1 {
    width: 600px;
    height: 600px;
    background: var(--primary-light);
    top: -200px;
    right: -100px;
    animation: float 20s ease-in-out infinite;
}

.shape-2 {
    width: 500px;
    height: 500px;
    background: var(--accent);
    bottom: -150px;
    left: -100px;
    animation: float 25s ease-in-out infinite reverse;
}

.shape-3 {
    width: 400px;
    height: 400px;
    background: var(--purple);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation: float 15s ease-in-out infinite;
    opacity: 0.3;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -30px) scale(1.05); }
    66% { transform: translate(-20px, 20px) scale(0.95); }
}

.hero-particles {
    position: absolute;
    inset: 0;
}

.hero-particles span {
    position: absolute;
    width: 6px;
    height: 6px;
    background: var(--primary-light);
    border-radius: 50%;
    opacity: 0.4;
    animation: particle 10s linear infinite;
}

.hero-particles span:nth-child(1) { left: 10%; top: 20%; animation-delay: 0s; }
.hero-particles span:nth-child(2) { left: 20%; top: 80%; animation-delay: 1s; }
.hero-particles span:nth-child(3) { left: 30%; top: 40%; animation-delay: 2s; }
.hero-particles span:nth-child(4) { left: 40%; top: 70%; animation-delay: 3s; }
.hero-particles span:nth-child(5) { left: 50%; top: 30%; animation-delay: 4s; }
.hero-particles span:nth-child(6) { left: 60%; top: 60%; animation-delay: 5s; }
.hero-particles span:nth-child(7) { left: 70%; top: 20%; animation-delay: 6s; }
.hero-particles span:nth-child(8) { left: 80%; top: 80%; animation-delay: 7s; }
.hero-particles span:nth-child(9) { left: 90%; top: 40%; animation-delay: 8s; }
.hero-particles span:nth-child(10) { left: 15%; top: 60%; animation-delay: 9s; }

@keyframes particle {
    0% { transform: translateY(0) scale(1); opacity: 0; }
    10% { opacity: 0.4; }
    90% { opacity: 0.4; }
    100% { transform: translateY(-100vh) scale(0); opacity: 0; }
}

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

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(30, 58, 138, 0.1);
    border-radius: 100px;
    font-size: 14px;
    font-weight: 500;
    color: var(--primary);
    margin-bottom: 24px;
    animation: fadeInUp 0.8s ease-out;
}

.hero-title {
    font-size: clamp(36px, 6vw, 72px);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    color: var(--dark);
    letter-spacing: -1px;
    animation: fadeInUp 0.8s ease-out 0.1s both;
}

.gradient-text {
    background: var(--gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

.hero-subtitle {
    font-size: clamp(16px, 2vw, 19px);
    color: var(--gray);
    max-width: 680px;
    margin: 0 auto 40px;
    line-height: 1.8;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 60px;
    animation: fadeInUp 0.8s ease-out 0.3s both;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 100px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
}

.btn-primary {
    background: var(--gradient);
    color: white;
    box-shadow: 0 10px 30px rgba(30, 58, 138, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 40px rgba(30, 58, 138, 0.4);
}

.btn-outline {
    background: white;
    color: var(--dark);
    border-color: rgba(0, 0, 0, 0.1);
}

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-2px);
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease-out 0.4s both;
}

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

.stat-number {
    font-size: 42px;
    font-weight: 800;
    background: var(--gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 14px;
    color: var(--gray);
    font-weight: 500;
}

.hero-scroll {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1;
    text-align: center;
    animation: fadeInUp 0.8s ease-out 0.5s both;
}

.hero-scroll a {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--gray);
    font-size: 12px;
    letter-spacing: 2px;
}

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

.scroll-indicator::before {
    content: '';
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: var(--primary);
    border-radius: 2px;
    animation: scrollDown 2s ease-in-out infinite;
}

@keyframes scrollDown {
    0% { top: 6px; opacity: 1; }
    100% { top: 22px; opacity: 0; }
}

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

/* ==================== 通用 Section ==================== */
section {
    padding: 100px 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 70px;
}

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(30, 58, 138, 0.08);
    color: var(--primary);
    border-radius: 100px;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 3px;
    margin-bottom: 16px;
}

.section-tag.light {
    background: rgba(255, 255, 255, 0.15);
    color: white;
}

.section-title {
    font-size: clamp(32px, 4vw, 48px);
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

.section-title.light {
    color: white;
}

.section-desc {
    font-size: 17px;
    color: var(--gray);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.8;
}

.section-desc.light {
    color: rgba(255, 255, 255, 0.8);
}

/* ==================== 业务板块 ==================== */
.services {
    background: var(--light);
}

.service-block {
    margin-bottom: 80px;
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.service-block.visible {
    opacity: 1;
    transform: translateY(0);
}

.service-block:last-child {
    margin-bottom: 0;
}

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

.service-block.reverse .service-grid {
    direction: rtl;
}

.service-block.reverse .service-grid > * {
    direction: ltr;
}

.service-number {
    font-size: 72px;
    font-weight: 900;
    background: var(--gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1;
    margin-bottom: 16px;
    opacity: 0.9;
}

.service-title {
    font-size: 32px;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

.service-desc {
    font-size: 16px;
    color: var(--gray);
    line-height: 1.8;
    margin-bottom: 32px;
}

.service-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.feature-item {
    display: flex;
    gap: 14px;
    padding: 16px;
    background: white;
    border-radius: var(--radius-md);
    transition: var(--transition);
    border: 1px solid rgba(0, 0, 0, 0.04);
}

.feature-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: rgba(30, 58, 138, 0.1);
}

.feature-icon {
    font-size: 28px;
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(30, 58, 138, 0.08), rgba(6, 182, 212, 0.08));
    border-radius: 12px;
}

.feature-item h4 {
    font-size: 15px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 4px;
}

.feature-item p {
    font-size: 13px;
    color: var(--gray);
    line-height: 1.5;
}

/* ==================== 视觉卡片 ==================== */
.service-visual {
    position: relative;
}

.visual-card {
    position: relative;
    background: white;
    border-radius: var(--radius-lg);
    padding: 32px;
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.visual-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient);
}

/* 代码窗口 */
.code-window {
    width: 100%;
    background: var(--dark);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

.code-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    background: var(--dark-2);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.dot.red { background: #ff5f57; }
.dot.yellow { background: #febc2e; }
.dot.green { background: #28c840; }

.code-title {
    margin-left: auto;
    font-size: 12px;
    color: var(--gray-light);
    font-family: 'Courier New', monospace;
}

.code-body {
    padding: 20px;
    font-family: 'Courier New', 'Consolas', monospace;
    font-size: 14px;
    line-height: 1.8;
    color: #e2e8f0;
}

.code-line {
    white-space: nowrap;
    overflow: hidden;
}

.keyword { color: #c084fc; }
.string { color: #86efac; }
.class { color: #fbbf24; }
.func { color: #60a5fa; }
.comment { color: #64748b; font-style: italic; }

.floating-icons {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.float-icon {
    position: absolute;
    width: 48px;
    height: 48px;
    background: white;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    box-shadow: var(--shadow-md);
    animation: floatIcon 6s ease-in-out infinite;
}

.icon-1 { top: 20px; right: 20px; animation-delay: 0s; }
.icon-2 { bottom: 80px; left: 20px; animation-delay: 1s; }
.icon-3 { top: 50%; right: -10px; animation-delay: 2s; }
.icon-4 { bottom: 20px; right: 40px; animation-delay: 3s; }

@keyframes floatIcon {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

/* 电商展示 */
.product-showcase {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    width: 100%;
}

.product-card {
    background: linear-gradient(135deg, #f0f9ff, #e0f2fe);
    border-radius: var(--radius-md);
    padding: 20px;
    text-align: center;
    position: relative;
    transition: var(--transition);
    border: 1px solid rgba(6, 182, 212, 0.1);
}

.product-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.pc-1 { grid-column: span 2; background: linear-gradient(135deg, #fef3c7, #fde68a); }
.pc-2 { background: linear-gradient(135deg, #fce7f3, #fbcfe8); }
.pc-3 { background: linear-gradient(135deg, #dbeafe, #bfdbfe); }

.product-badge {
    position: absolute;
    top: 12px;
    left: 12px;
    padding: 4px 10px;
    background: #ef4444;
    color: white;
    font-size: 11px;
    font-weight: 700;
    border-radius: 100px;
}

.product-badge.new {
    background: var(--accent);
}

.product-icon {
    font-size: 48px;
    margin: 10px 0;
}

.product-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 6px;
}

.product-price {
    font-size: 18px;
    font-weight: 800;
    color: #ef4444;
}

.ecom-stats {
    display: flex;
    gap: 16px;
    margin-top: 20px;
    width: 100%;
}

.ecom-stat {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px;
    background: var(--light);
    border-radius: var(--radius-sm);
}

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

.stat-num {
    font-size: 18px;
    font-weight: 800;
    color: var(--dark);
    line-height: 1;
}

.stat-txt {
    font-size: 12px;
    color: var(--gray);
    margin-top: 2px;
}

/* 教育培训 */
.edu-board {
    width: 100%;
    background: linear-gradient(135deg, #1e293b, #334155);
    border-radius: var(--radius-md);
    padding: 28px;
    color: white;
    position: relative;
    overflow: hidden;
}

.edu-board::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.15) 0%, transparent 70%);
}

.board-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 24px;
    position: relative;
}

.algorithm-demo {
    position: relative;
    height: 200px;
    margin-bottom: 20px;
}

.algo-node {
    position: absolute;
    width: 48px;
    height: 48px;
    background: var(--gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 18px;
    color: white;
    box-shadow: 0 8px 20px rgba(99, 102, 241, 0.4);
    z-index: 1;
}

.n1 { top: 26px; left: 36px; }
.n2 { top: 26px; left: 126px; }
.n3 { top: 126px; left: 126px; }
.n4 { top: 26px; left: 216px; }

.algo-lines {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
}

.board-stats {
    display: flex;
    gap: 12px;
    position: relative;
}

.bs-item {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-sm);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

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

.bs-text {
    font-size: 14px;
    font-weight: 600;
}

/* ==================== 关于我们 ==================== */
.about {
    background: white;
}

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

.about-card {
    padding: 36px 28px;
    background: var(--light);
    border-radius: var(--radius-lg);
    transition: var(--transition);
    border: 1px solid transparent;
    opacity: 0;
    transform: translateY(20px);
}

.about-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.about-card:hover {
    background: white;
    border-color: rgba(30, 58, 138, 0.1);
    box-shadow: var(--shadow-lg);
    transform: translateY(-8px);
}

.about-icon {
    width: 56px;
    height: 56px;
    background: var(--gradient);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: white;
}

.about-icon svg {
    width: 28px;
    height: 28px;
}

.about-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 12px;
}

.about-card p {
    font-size: 14px;
    color: var(--gray);
    line-height: 1.8;
}

/* ==================== 联系我们 ==================== */
.contact {
    background: var(--gradient);
    position: relative;
    overflow: hidden;
}

.contact::before {
    content: '';
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(255,255,255,0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255,255,255,0.08) 0%, transparent 50%);
}

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

.contact-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 60px;
}

.contact-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    text-align: center;
    color: white;
    transition: var(--transition);
    opacity: 0;
    transform: translateY(20px);
}

.contact-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.contact-card:hover {
    background: rgba(255, 255, 255, 0.18);
    transform: translateY(-6px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.contact-icon {
    width: 64px;
    height: 64px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: white;
}

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

.contact-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
}

.contact-card p {
    font-size: 15px;
    opacity: 0.9;
}

/* ==================== 页脚 ==================== */
.footer {
    background: var(--dark);
    color: rgba(255, 255, 255, 0.7);
    padding: 70px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 50px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

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

.footer-logo .logo-main {
    color: white;
}

.footer-logo .logo-sub {
    color: rgba(255, 255, 255, 0.5);
}

.footer-desc {
    font-size: 14px;
    line-height: 1.8;
    max-width: 320px;
}

.footer-links h4 {
    color: white;
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 20px;
}

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

.footer-links a,
.footer-links li {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    transition: var(--transition);
}

.footer-links a:hover {
    color: white;
    padding-left: 4px;
}

.footer-bottom {
    padding: 24px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.5);
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.6);
    transition: var(--transition);
}

.footer-bottom a:hover {
    color: white;
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 1024px) {
    .service-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .service-block.reverse .service-grid {
        direction: ltr;
    }
    
    .about-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 36px;
    }
}

@media (max-width: 768px) {
    section {
        padding: 70px 0;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 20px;
        gap: 4px;
        box-shadow: var(--shadow-lg);
        transform: translateY(-120%);
        transition: var(--transition);
        opacity: 0;
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero {
        padding: 100px 20px 60px;
        min-height: auto;
    }
    
    .hero-stats {
        gap: 30px;
    }
    
    .stat-number {
        font-size: 32px;
    }
    
    .service-features {
        grid-template-columns: 1fr;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    
    .product-showcase {
        grid-template-columns: 1fr;
    }
    
    .pc-1 {
        grid-column: span 1;
    }
    
    .ecom-stats {
        flex-direction: column;
    }
    
    .hero-scroll {
        display: none;
    }
}

@media (max-width: 480px) {
    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .service-number {
        font-size: 56px;
    }
    
    .service-title {
        font-size: 26px;
    }
    
    .visual-card {
        padding: 20px;
        min-height: 340px;
    }
}