@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700;800&display=swap');

/* ==========================================
   1. 设计系统变量 (Design Tokens)
   ========================================== */
:root {
    --bg-dark: #070814;
    --bg-card: rgba(15, 17, 43, 0.6);
    --bg-card-hover: rgba(22, 26, 64, 0.75);
    
    --primary: #00f2fe;        /* 亮蓝/青 */
    --primary-grad: linear-gradient(135deg, #00f2fe 0%, #4facfe 100%);
    --accent: #9d4edd;         /* 霓虹紫 */
    --accent-grad: linear-gradient(135deg, #7b2cbf 0%, #9d4edd 100%);
    --mix-grad: linear-gradient(135deg, #00f2fe 0%, #7b2cbf 100%);
    
    --border-color: rgba(255, 255, 255, 0.06);
    --border-glow: rgba(0, 242, 254, 0.2);
    --border-glow-purple: rgba(157, 78, 221, 0.2);
    
    --text-main: #ffffff;
    --text-muted: #9fa4c7;
    --text-dim: #6c729c;
    
    --font-heading: 'Outfit', 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    
    --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-fast: all 0.2s ease;
}

/* ==========================================
   2. 基础重置与全局样式 (Base Settings)
   ========================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    background-color: var(--bg-dark);
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-dark);
    color: var(--text-main);
    overflow-x: hidden;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* 背景发光球体特效 (Background Glow Orbs) */
.glow-orbs {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    pointer-events: none;
    overflow: hidden;
}

.orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.15;
}

.orb-1 {
    top: -20%;
    left: -10%;
    width: 60vw;
    height: 60vw;
    background: radial-gradient(circle, var(--primary) 0%, transparent 70%);
    animation: orb-move 20s infinite alternate;
}

.orb-2 {
    bottom: -10%;
    right: -10%;
    width: 50vw;
    height: 50vw;
    background: radial-gradient(circle, var(--accent) 0%, transparent 70%);
    animation: orb-move-reverse 25s infinite alternate;
}

@keyframes orb-move {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(10%, 15%) scale(1.1); }
}

@keyframes orb-move-reverse {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(-10%, -10%) scale(1.15); }
}

/* 滚动条定制 */
::-webkit-scrollbar {
    width: 10px;
}
::-webkit-scrollbar-track {
    background: var(--bg-dark);
}
::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 5px;
    border: 2px solid var(--bg-dark);
}
::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}

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

/* ==========================================
   3. 布局与通用组件 (Layout & Utilities)
   ========================================== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section {
    padding: 100px 0;
    position: relative;
}

.section-title {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 1rem;
    letter-spacing: -0.5px;
    background: linear-gradient(to right, #ffffff, #8b92c4);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-muted);
    text-align: center;
    max-width: 600px;
    margin: 0 auto 4rem auto;
}

/* 按钮样式 (Buttons) */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.8rem 2rem;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition-smooth);
    border: 1px solid transparent;
}

.btn-primary {
    background: var(--primary-grad);
    color: #000;
    box-shadow: 0 4px 20px rgba(0, 242, 254, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(0, 242, 254, 0.5);
    background: linear-gradient(135deg, #00f2fe 30%, #a200ff 100%);
    color: #fff;
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.03);
    color: var(--text-main);
    border-color: rgba(255, 255, 255, 0.1);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-3px);
}

/* 渐变文本 (Gradient Text) */
.grad-text {
    background: var(--primary-grad);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.mix-grad-text {
    background: var(--mix-grad);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* 玻璃拟态卡片 (Glass Cards) */
.glass-card {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    transition: var(--transition-smooth);
}

/* ==========================================
   4. 头部导航 (Header / Navbar)
   ========================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    transition: var(--transition-smooth);
    border-bottom: 1px solid transparent;
}

.header.scrolled {
    background: rgba(7, 8, 20, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    padding: 0.8rem 0;
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.header.scrolled .nav-container {
    height: 60px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    cursor: pointer;
}

.logo-icon {
    width: 40px;
    height: 40px;
    filter: drop-shadow(0 0 8px rgba(0, 242, 254, 0.6));
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2.5rem;
    list-style: none;
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-muted);
    transition: var(--transition-fast);
    position: relative;
    padding: 0.5rem 0;
}

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

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

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

.nav-btn {
    padding: 0.6rem 1.5rem;
    font-size: 0.9rem;
}

/* 移动端导航按钮 */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
    border: none;
    background: transparent;
    padding: 5px;
}

.menu-toggle span {
    display: block;
    width: 25px;
    height: 2px;
    background-color: var(--text-main);
    transition: var(--transition-fast);
}

/* ==========================================
   5. 首屏展示区 (Hero Section)
   ========================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 120px;
    position: relative;
    overflow: hidden;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 4rem;
    align-items: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: rgba(0, 242, 254, 0.08);
    border: 1px solid rgba(0, 242, 254, 0.15);
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 2rem;
    animation: pulse-border 3s infinite alternate;
}

@keyframes pulse-border {
    0% { border-color: rgba(0, 242, 254, 0.15); box-shadow: 0 0 5px rgba(0, 242, 254, 0); }
    100% { border-color: rgba(0, 242, 254, 0.4); box-shadow: 0 0 15px rgba(0, 242, 254, 0.15); }
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 1.5rem;
    letter-spacing: -1.5px;
}

.hero-title span.slogan-latin {
    display: block;
    font-size: 2.2rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-top: 0.5rem;
    background: linear-gradient(to right, #00f2fe, #9d4edd);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-description {
    font-size: 1.15rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
    max-width: 600px;
}

.hero-actions {
    display: flex;
    gap: 1.5rem;
}

/* 首屏高端视觉图 (Hero Interactive Tech Core) */
.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.tech-cube-container {
    width: 320px;
    height: 320px;
    position: relative;
    transform-style: preserve-3d;
    animation: float 6s ease-in-out infinite;
}

.cube-outer-glow {
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(0, 242, 254, 0.2) 0%, transparent 60%);
    filter: blur(20px);
}

.tech-ring {
    position: absolute;
    border: 2px dashed rgba(0, 242, 254, 0.3);
    border-radius: 50%;
    width: 100%;
    height: 100%;
    animation: rotate 20s linear infinite;
}

.tech-ring-inner {
    position: absolute;
    border: 2px solid rgba(157, 78, 221, 0.2);
    border-radius: 50%;
    width: 80%;
    height: 80%;
    top: 10%;
    left: 10%;
    animation: rotate-reverse 15s linear infinite;
}

.core-sphere {
    position: absolute;
    width: 40%;
    height: 40%;
    top: 30%;
    left: 30%;
    border-radius: 50%;
    background: radial-gradient(circle, #00f2fe 0%, #9d4edd 100%);
    box-shadow: 0 0 50px rgba(0, 242, 254, 0.6),
                0 0 100px rgba(157, 78, 221, 0.4);
    animation: pulse-sphere 4s ease-in-out infinite alternate;
}

.floating-cards {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
}

.f-card {
    position: absolute;
    padding: 10px 16px;
    background: rgba(15, 17, 43, 0.85);
    border: 1px solid rgba(0, 242, 254, 0.3);
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    white-space: nowrap;
}

.fc-1 {
    top: 0;
    left: -20px;
    border-color: rgba(0, 242, 254, 0.4);
    animation: hover-card 4s ease-in-out infinite;
}

.fc-2 {
    bottom: 20px;
    right: -40px;
    border-color: rgba(157, 78, 221, 0.4);
    animation: hover-card-delay 4.5s ease-in-out infinite;
}

.fc-3 {
    top: 60%;
    left: -40px;
    border-color: #00f2fe;
    animation: hover-card-delay2 5s ease-in-out infinite;
}

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

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

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

@keyframes pulse-sphere {
    0% { transform: scale(0.9); box-shadow: 0 0 40px rgba(0, 242, 254, 0.5); }
    100% { transform: scale(1.1); box-shadow: 0 0 70px rgba(157, 78, 221, 0.8); }
}

@keyframes hover-card {
    0%, 100% { transform: translateY(0) rotate(-2deg); }
    50% { transform: translateY(-8px) rotate(1deg); }
}

@keyframes hover-card-delay {
    0%, 100% { transform: translateY(0) rotate(3deg); }
    50% { transform: translateY(-10px) rotate(-1deg); }
}

@keyframes hover-card-delay2 {
    0%, 100% { transform: translateY(0) rotate(-1deg); }
    50% { transform: translateY(6px) rotate(2deg); }
}

/* ==========================================
   6. 优势展示区 (Advantages Section)
   ========================================== */
.adv-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.adv-card {
    padding: 3rem 2rem;
    text-align: center;
    border-color: rgba(255, 255, 255, 0.04);
}

.adv-card:hover {
    transform: translateY(-8px);
    border-color: var(--border-glow);
    box-shadow: 0 10px 30px rgba(0, 242, 254, 0.05);
}

.adv-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 1.5rem auto;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 16px;
    background: rgba(0, 242, 254, 0.06);
    color: var(--primary);
    font-size: 1.8rem;
    transition: var(--transition-smooth);
}

.adv-card:hover .adv-icon {
    background: var(--primary-grad);
    color: #000;
    transform: rotateY(180deg);
}

.adv-card h3 {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.adv-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ==========================================
   7. 产品与服务区 (Products Section)
   ========================================== */
.products-filter {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3.5rem;
}

.filter-btn {
    padding: 0.6rem 1.8rem;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-muted);
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    border-radius: 30px;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.filter-btn:hover {
    color: var(--text-main);
    border-color: var(--primary);
}

.filter-btn.active {
    background: var(--primary-grad);
    color: #000;
    border-color: transparent;
    font-weight: 600;
    box-shadow: 0 4px 15px rgba(0, 242, 254, 0.2);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2.5rem;
}

.product-card {
    padding: 2.5rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 100%;
}

.product-card:hover {
    transform: translateY(-5px);
    border-color: var(--border-glow);
    background: var(--bg-card-hover);
    box-shadow: 0 15px 40px rgba(0, 242, 254, 0.05);
}

.product-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1.5rem;
}

.product-tag {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 4px 12px;
    border-radius: 50px;
    background: rgba(157, 78, 221, 0.15);
    color: #bf8eff;
    border: 1px solid rgba(157, 78, 221, 0.25);
}

.product-icon {
    font-size: 2.2rem;
    background: var(--mix-grad);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.product-body h3 {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 1rem;
    letter-spacing: -0.3px;
}

.product-body p {
    color: var(--text-muted);
    font-size: 0.98rem;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.product-specs {
    list-style: none;
    margin-bottom: 2rem;
}

.product-specs li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 0.6rem;
}

.product-specs li svg {
    color: var(--primary);
    flex-shrink: 0;
}

.product-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding-top: 1.5rem;
    margin-top: auto;
}

.learn-more {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--primary);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition-fast);
}

.learn-more svg {
    transition: var(--transition-fast);
}

.learn-more:hover {
    color: #fff;
}

.learn-more:hover svg {
    transform: translateX(5px);
}

/* ==========================================
   8. 关于我们区 (About Us Section)
   ========================================== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-content {
    display: flex;
    flex-direction: column;
}

.about-slogan {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 1.5rem;
}

.about-p {
    color: var(--text-muted);
    margin-bottom: 1.5rem;
    font-size: 1.05rem;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 2rem;
}

.stat-item {
    border-left: 2px solid var(--primary);
    padding-left: 1.2rem;
}

.stat-number {
    font-family: var(--font-heading);
    font-size: 2.2rem;
    font-weight: 800;
    color: #fff;
    margin-bottom: 0.2rem;
    line-height: 1;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 500;
}

/* 关于我们插图交互区 */
.about-visual {
    position: relative;
    padding: 2rem;
}

.about-image-card {
    position: relative;
    padding: 3rem 2.5rem;
    overflow: hidden;
    z-index: 1;
}

.about-image-card::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(157, 78, 221, 0.1) 0%, transparent 60%);
    z-index: -1;
}

.timeline-glow-container {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.timeline-node {
    display: flex;
    gap: 1rem;
    position: relative;
}

.timeline-node:not(:last-child)::after {
    content: '';
    position: absolute;
    left: 15px;
    top: 30px;
    bottom: -20px;
    width: 2px;
    background: linear-gradient(to bottom, var(--primary), transparent);
}

.t-dot {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: rgba(0, 242, 254, 0.1);
    border: 1px solid var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 0.8rem;
    font-weight: 700;
    flex-shrink: 0;
    box-shadow: 0 0 10px rgba(0, 242, 254, 0.2);
}

.t-dot.special {
    border-color: var(--accent);
    color: var(--accent);
    background: rgba(157, 78, 221, 0.1);
    box-shadow: 0 0 10px rgba(157, 78, 221, 0.2);
}

.t-content h4 {
    font-size: 1.05rem;
    margin-bottom: 0.3rem;
}

.t-content p {
    font-size: 0.88rem;
    color: var(--text-muted);
}

/* ==========================================
   9. 合作伙伴区 (Partners Section)
   ========================================== */
.partners-section {
    padding: 60px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.03);
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
    background: rgba(7, 8, 20, 0.5);
}

.partners-wrap {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
}

.partners-title {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--text-dim);
    font-weight: 600;
}

.partners-grid {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 6rem;
    flex-wrap: wrap;
}

.partner-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    opacity: 0.45;
    transition: var(--transition-smooth);
    cursor: pointer;
}

.partner-logo:hover {
    opacity: 1;
    filter: drop-shadow(0 0 8px rgba(0, 242, 254, 0.3));
}

.partner-icon {
    font-size: 1.8rem;
    color: var(--primary);
}

.partner-name {
    font-family: var(--font-heading);
    font-size: 1.35rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    color: #fff;
}

/* ==========================================
   10. 联系我们区 (Contact Section)
   ========================================== */
.contact-grid {
    display: grid;
    grid-template-columns: 0.8fr 1.2fr;
    gap: 4rem;
}

.contact-info {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.contact-info h3 {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
}

.contact-info p {
    color: var(--text-muted);
    margin-bottom: 2.5rem;
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.c-method {
    display: flex;
    align-items: flex-start;
    gap: 1.2rem;
}

.cm-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: rgba(0, 242, 254, 0.05);
    border: 1px solid rgba(0, 242, 254, 0.1);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.cm-details h4 {
    font-size: 0.95rem;
    color: var(--text-muted);
    margin-bottom: 0.2rem;
}

.cm-details p {
    color: #fff;
    margin: 0;
    font-size: 1.05rem;
    font-weight: 500;
}

/* 联系表单 */
.contact-form {
    padding: 3.5rem;
    border-color: rgba(255, 255, 255, 0.04);
}

.form-title {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    margin-bottom: 2rem;
}

.form-group {
    margin-bottom: 1.8rem;
    position: relative;
}

.form-label {
    display: block;
    font-size: 0.88rem;
    color: var(--text-muted);
    margin-bottom: 0.6rem;
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 1rem 1.2rem;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 10px;
    color: #fff;
    font-family: var(--font-body);
    font-size: 0.95rem;
    transition: var(--transition-smooth);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    background: rgba(255, 255, 255, 0.05);
    box-shadow: 0 0 15px rgba(0, 242, 254, 0.1);
}

textarea.form-control {
    resize: none;
    min-height: 120px;
}

.btn-submit {
    width: 100%;
    border: none;
}

/* 成功状态弹窗提示 */
.alert-success {
    display: none;
    padding: 1rem 1.5rem;
    background: rgba(0, 242, 254, 0.1);
    border: 1px solid var(--primary);
    border-radius: 10px;
    color: var(--primary);
    font-size: 0.9rem;
    font-weight: 500;
    margin-top: 1.5rem;
    text-align: center;
    animation: fadeIn 0.4s ease forwards;
}

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

/* ==========================================
   11. 页脚 (Footer)
   ========================================== */
.footer {
    background: #04050d;
    padding: 80px 0 30px 0;
    border-top: 1px solid var(--border-color);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 4rem;
    margin-bottom: 50px;
}

.footer-logo {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
}

.footer-logo-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 800;
    color: #fff;
}

.footer-desc {
    color: var(--text-muted);
    font-size: 0.92rem;
    line-height: 1.6;
}

.footer-links-col h4 {
    font-family: var(--font-heading);
    font-size: 1.05rem;
    margin-bottom: 1.8rem;
    color: #fff;
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.footer-links a {
    font-size: 0.92rem;
    color: var(--text-muted);
    transition: var(--transition-fast);
}

.footer-links a:hover {
    color: var(--primary);
    padding-left: 5px;
}

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

.footer-copy {
    font-size: 0.85rem;
    color: var(--text-dim);
}

.footer-socials {
    display: flex;
    gap: 1.2rem;
}

.social-icon {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    transition: var(--transition-smooth);
}

.social-icon:hover {
    background: var(--primary-grad);
    color: #000;
    border-color: transparent;
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 242, 254, 0.25);
}

/* ==========================================
   12. 弹窗详情组件 (Modal Component)
   ========================================== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(4, 5, 13, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.modal.active {
    display: flex;
    opacity: 1;
}

.modal-content {
    max-width: 650px;
    width: 90%;
    padding: 3rem;
    position: relative;
    animation: modal-slide-up 0.4s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes modal-slide-up {
    from { transform: translateY(30px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.modal-close {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    transition: var(--transition-fast);
}

.modal-close:hover {
    color: #fff;
    transform: rotate(90deg);
}

.modal-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 1.5rem;
}

.modal-header h3 {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    margin: 0;
}

.modal-body {
    color: var(--text-muted);
    font-size: 1rem;
    line-height: 1.7;
}

.modal-body p {
    margin-bottom: 1.5rem;
}

.modal-body ul {
    list-style: none;
    margin: 1.5rem 0;
}

.modal-body ul li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 0.8rem;
}

.modal-body ul li svg {
    color: var(--primary);
    margin-top: 4px;
    flex-shrink: 0;
}

/* ==========================================
   13. 动画与滚动视口效果 (Scroll Reveal)
   ========================================== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.15s; }
.reveal-delay-2 { transition-delay: 0.3s; }
.reveal-delay-3 { transition-delay: 0.45s; }

/* ==========================================
   14. 响应式布局媒体查询 (Responsive Queries)
   ========================================== */
@media (max-width: 1024px) {
    .hero-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
        text-align: center;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .hero-description {
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero-visual {
        margin-top: 2rem;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .adv-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 80px;
        left: 0;
        width: 100%;
        height: 0;
        overflow: hidden;
        background: rgba(7, 8, 20, 0.95);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        flex-direction: column;
        gap: 2rem;
        padding: 0;
        transition: var(--transition-smooth);
        border-bottom: 0px solid var(--border-color);
    }
    
    .nav-menu.active {
        height: calc(100vh - 80px);
        padding: 3rem 0;
        border-bottom: 1px solid var(--border-color);
    }
    
    .menu-toggle {
        display: flex;
    }
    
    /* 汉堡菜单动画 */
    .menu-toggle.active span:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }
    
    .menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .menu-toggle.active span:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }
    
    .hero-title {
        font-size: 3rem;
    }
    
    .hero-title span.slogan-latin {
        font-size: 1.6rem;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .adv-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .contact-form {
        padding: 2.5rem 1.5rem;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
}

/* ==========================================
   15. 模式对比与收费模式 (Comparison & Pricing)
   ========================================== */
.compare-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-bottom: 50px;
}

.compare-card {
    padding: 3rem 2rem;
    position: relative;
    overflow: hidden;
}

.compare-card.winner {
    border-color: var(--primary);
    box-shadow: 0 0 30px rgba(0, 242, 254, 0.15);
    background: rgba(0, 242, 254, 0.03);
}

.compare-badge {
    position: absolute;
    top: 15px;
    right: 15px;
    background: var(--primary-grad);
    color: #000;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 3px 10px;
    border-radius: 30px;
    text-transform: uppercase;
}

.compare-card h3 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    text-align: center;
}

.compare-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.compare-list li {
    font-size: 0.92rem;
    color: var(--text-muted);
    display: flex;
    align-items: flex-start;
    gap: 8px;
    line-height: 1.5;
}

.compare-list li svg {
    flex-shrink: 0;
    margin-top: 3px;
}

.compare-list li.check svg {
    color: var(--primary);
}

.compare-list li.cross svg {
    color: #ff4a5a;
}

/* 收费模式 */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

.pricing-card {
    padding: 2.5rem 1.5rem;
    text-align: center;
    border-color: rgba(255, 255, 255, 0.04);
}

.pricing-card:hover {
    transform: translateY(-5px);
    border-color: var(--border-glow-purple);
    box-shadow: 0 10px 30px rgba(157, 78, 221, 0.05);
}

.pricing-icon {
    font-size: 2rem;
    margin-bottom: 1rem;
    display: inline-block;
}

.pricing-card h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: #fff;
}

.price-value {
    font-family: var(--font-heading);
    font-size: 2.2rem;
    font-weight: 800;
    margin-bottom: 1rem;
}

.price-unit {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-muted);
}

.pricing-card p {
    font-size: 0.88rem;
    color: var(--text-muted);
    line-height: 1.5;
}

/* ==========================================
   16. 实机演示视频与下载 (Video Gallery & Resource)
   ========================================== */
.video-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2.5rem;
    margin-bottom: 3.5rem;
}

.video-card {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
}

.video-wrapper {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    aspect-ratio: 16/9;
    background: #000;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.video-player {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.video-info h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: #fff;
}

.video-info p {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.pdf-download-card {
    display: grid;
    grid-template-columns: 80px 1fr auto;
    gap: 2rem;
    align-items: center;
    padding: 2.5rem 3rem;
    border-color: rgba(0, 242, 254, 0.2);
    background: linear-gradient(135deg, rgba(0, 242, 254, 0.02) 0%, rgba(157, 78, 221, 0.02) 100%);
    border-radius: 20px;
    margin-top: 2rem;
}

.pdf-icon-wrap {
    width: 72px;
    height: 72px;
    border-radius: 16px;
    background: rgba(255, 74, 90, 0.08);
    border: 1px solid rgba(255, 74, 90, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ff4a5a;
    font-size: 2.2rem;
}

.pdf-info h3 {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    margin-bottom: 0.4rem;
    color: #fff;
}

.pdf-info p {
    font-size: 0.95rem;
    color: var(--text-muted);
}

/* 适配模式对比与视频的媒体查询 */
@media (max-width: 1024px) {
    .compare-grid {
        grid-template-columns: 1fr;
        max-width: 500px;
        margin: 0 auto 40px auto;
    }
    
    .pricing-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .pricing-grid {
        grid-template-columns: 1fr;
    }
    
    .video-grid {
        grid-template-columns: 1fr;
    }
    
    .pdf-download-card {
        grid-template-columns: 1fr;
        text-align: center;
        justify-items: center;
        gap: 1.5rem;
        padding: 2rem;
    }
}