/* ============================================================
   开拓者科技 - 现代化设计系统 v2.0
   设计风格：现代简约 · 高端科技 · 营销导向
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;500;700;900&family=Inter:wght@400;500;600;700;800;900&display=swap');

:root {
    /* 品牌主色 - 中国红（更高级的红色调） */
    --color-primary: #dc2626;
    --color-primary-light: #ef4444;
    --color-primary-dark: #b91c1c;
    --color-primary-50: #fef2f2;
    --color-primary-100: #fee2e2;
    --color-primary-600: #dc2626;
    --color-primary-700: #b91c1c;
    
    /* 辅助色 */
    --color-accent: #f59e0b;
    --color-success: #10b981;
    --color-info: #3b82f6;
    
    /* 中性色 - 更现代的灰阶 */
    --color-white: #ffffff;
    --color-gray-50: #fafafa;
    --color-gray-100: #f4f4f5;
    --color-gray-200: #e4e4e7;
    --color-gray-300: #d4d4d8;
    --color-gray-400: #a1a1aa;
    --color-gray-500: #71717a;
    --color-gray-600: #52525b;
    --color-gray-700: #3f3f46;
    --color-gray-800: #27272a;
    --color-gray-900: #18181b;
    --color-gray-950: #09090b;
    
    /* 渐变 */
    --gradient-primary: linear-gradient(135deg, #dc2626 0%, #991b1b 100%);
    --gradient-primary-light: linear-gradient(135deg, #fef2f2 0%, #fee2e2 100%);
    --gradient-dark: linear-gradient(135deg, #18181b 0%, #27272a 100%);
    --gradient-hero: linear-gradient(135deg, #0f0f12 0%, #1a1a1f 50%, #27272a 100%);
    --gradient-gold: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    --gradient-silver: linear-gradient(135deg, #f4f4f5 0%, #d4d4d8 100%);
    
    /* 字体 */
    --font-sans: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    /* 字号 - 更现代的排版比例 */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 2rem;
    --text-4xl: 2.5rem;
    --text-5xl: 3.5rem;
    --text-6xl: 4.5rem;
    --text-7xl: 6rem;
    
    /* 间距 */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.5rem;
    --space-6: 2rem;
    --space-8: 2.5rem;
    --space-10: 3rem;
    --space-12: 4rem;
    --space-16: 5rem;
    --space-20: 6rem;
    --space-24: 8rem;
    --space-32: 10rem;
    
    /* 圆角 */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-2xl: 32px;
    --radius-full: 9999px;
    
    /* 阴影 - 更柔和多层次 */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.07), 0 2px 4px -2px rgb(0 0 0 / 0.05);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.08), 0 4px 6px -4px rgb(0 0 0 / 0.05);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.08), 0 8px 10px -6px rgb(0 0 0 / 0.05);
    --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.15);
    --shadow-glow: 0 0 40px rgba(220, 38, 38, 0.2);
    --shadow-glow-lg: 0 0 80px rgba(220, 38, 38, 0.25);
    
    /* 过渡 */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* 容器 */
    --container-max: 1280px;
    --container-padding: 1.5rem;
    
    /* 导航高度 */
    --nav-height: 72px;
    
    /* Z-index */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-modal: 400;
    --z-toast: 500;
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
    font-family: var(--font-sans);
    font-size: var(--text-base);
    line-height: 1.6;
    color: var(--color-gray-700);
    background: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}
img, picture, video, canvas, svg { display: block; max-width: 100%; }
input, button, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; border: none; background: none; }
a { color: inherit; text-decoration: none; transition: color var(--transition-fast); }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.2; color: var(--color-gray-900); }

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.skip-link {
    position: absolute;
    left: -9999px;
    top: auto;
    width: 1px;
    height: 1px;
    overflow: hidden;
}
.skip-link:focus {
    position: fixed;
    top: 0;
    left: 0;
    width: auto;
    height: auto;
    padding: var(--space-3) var(--space-4);
    background: var(--color-primary);
    color: white;
    z-index: var(--z-toast);
}

/* ============================================================
   Buttons - 更现代的按钮设计
   ============================================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: 0.75rem 1.75rem;
    font-size: var(--text-sm);
    font-weight: 600;
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
    white-space: nowrap;
    position: relative;
    overflow: hidden;
    letter-spacing: 0.01em;
}
.btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.2), transparent);
    opacity: 0;
    transition: opacity var(--transition-base);
}
.btn:hover::before { opacity: 1; }

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 14px rgba(220, 38, 38, 0.35);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(220, 38, 38, 0.45);
}
.btn-primary:active { transform: translateY(0); }

.btn-secondary {
    background: var(--color-gray-900);
    color: white;
}
.btn-secondary:hover {
    background: var(--color-gray-800);
    transform: translateY(-2px);
}

.btn-outline {
    border: 1.5px solid var(--color-gray-200);
    color: var(--color-gray-700);
    background: white;
}
.btn-outline:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: var(--color-primary-50);
    transform: translateY(-2px);
}

.btn-ghost {
    color: var(--color-gray-700);
    background: transparent;
}
.btn-ghost:hover {
    color: var(--color-primary);
    background: var(--color-primary-50);
}

.btn-white {
    background: white;
    color: var(--color-gray-900);
    box-shadow: var(--shadow-lg);
}
.btn-white:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.btn-lg {
    padding: 1rem 2.25rem;
    font-size: var(--text-base);
    font-weight: 700;
}

.btn .icon-arrow {
    width: 16px;
    height: 16px;
    transition: transform var(--transition-base);
}
.btn:hover .icon-arrow {
    transform: translateX(4px);
}

/* ============================================================
   Header / Navigation - 玻璃拟态导航
   ============================================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-fixed);
    transition: all var(--transition-base);
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}
.header.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(24px);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
    border-bottom-color: var(--color-gray-100);
}

.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--nav-height);
    padding: 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    flex-shrink: 0;
}
.logo-img {
    height: 48px;
    width: auto;
    object-fit: contain;
}
.footer-logo .logo-img {
    height: 44px;
}
@media (max-width: 768px) {
    .logo-img { height: 38px; }
}
    width: 44px;
    height: 44px;
    background: var(--gradient-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 900;
    font-size: var(--text-sm);
    border-radius: var(--radius-md);
    letter-spacing: 0.05em;
    box-shadow: 0 4px 12px rgba(220, 38, 38, 0.3);
}
.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
}
.logo-cn {
    font-size: var(--text-lg);
    font-weight: 900;
    color: var(--color-gray-900);
    letter-spacing: 0.05em;
}
.logo-en {
    font-size: 10px;
    color: var(--color-gray-400);
    letter-spacing: 0.15em;
    font-weight: 600;
    text-transform: uppercase;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-1);
}
.nav-link {
    position: relative;
    display: block;
    padding: var(--space-3) var(--space-4);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-gray-600);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}
.nav-link:hover {
    color: var(--color-primary);
    background: var(--color-primary-50);
}
.nav-link.active {
    color: var(--color-primary);
    font-weight: 600;
}
.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 4px;
    background: var(--color-primary);
    border-radius: 50%;
}

.nav-cta .btn {
    padding: 0.5rem 1.25rem;
    font-size: var(--text-sm);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--space-2);
}
.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-gray-700);
    border-radius: 2px;
    transition: all var(--transition-base);
}

/* ============================================================
   Hero Section - 更有冲击力的首屏
   ============================================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: var(--gradient-hero);
    overflow: hidden;
    padding-top: var(--nav-height);
}

/* 动态背景光效 */
.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(220, 38, 38, 0.2) 0%, transparent 60%);
    border-radius: 50%;
    pointer-events: none;
    animation: heroGlow 8s ease-in-out infinite alternate;
}
.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(245, 158, 11, 0.1) 0%, transparent 60%);
    border-radius: 50%;
    pointer-events: none;
    animation: heroGlow2 10s ease-in-out infinite alternate-reverse;
}
@keyframes heroGlow {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(5%, 5%) scale(1.1); }
}
@keyframes heroGlow2 {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(-5%, -5%) scale(1.05); }
}

/* 网格背景 */
.hero-grid-bg {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 40%, transparent 80%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 40%, transparent 80%);
}

.hero .container {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: var(--space-12);
    align-items: center;
    padding-top: var(--space-12);
    padding-bottom: var(--space-12);
}

.hero-content { color: white; }

.hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: 0.5rem 1rem;
    background: rgba(220, 38, 38, 0.15);
    border: 1px solid rgba(220, 38, 38, 0.3);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    font-weight: 500;
    color: #fca5a5;
    margin-bottom: var(--space-6);
    backdrop-filter: blur(10px);
}
.hero-eyebrow-dot {
    width: 6px;
    height: 6px;
    background: var(--color-primary-light);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--color-primary-light);
    animation: pulse 2s infinite;
}
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, var(--text-6xl));
    font-weight: 900;
    line-height: 1.05;
    margin-bottom: var(--space-6);
    letter-spacing: -0.02em;
}
.hero-title-line {
    display: block;
    opacity: 0;
    animation: slideUp 0.8s ease forwards;
}
.hero-title-line:nth-child(1) { animation-delay: 0.1s; }
.hero-title-line:nth-child(2) { animation-delay: 0.2s; }
.hero-title .highlight {
    background: linear-gradient(135deg, #fca5a5 0%, #ef4444 50%, #dc2626 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
@keyframes slideUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

.hero-subtitle {
    font-size: var(--text-lg);
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.65);
    margin-bottom: var(--space-8);
    max-width: 520px;
}

.hero-value-props {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
    margin-bottom: var(--space-10);
}
.value-prop {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    padding: var(--space-3);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}
.value-prop:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(220, 38, 38, 0.3);
}
.value-prop-icon {
    width: 36px;
    height: 36px;
    flex-shrink: 0;
    background: var(--gradient-primary);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-base);
}
.value-prop-text strong {
    display: block;
    font-size: var(--text-sm);
    font-weight: 700;
    color: white;
    margin-bottom: 2px;
}
.value-prop-text span {
    font-size: var(--text-xs);
    color: rgba(255, 255, 255, 0.5);
}

.hero-actions {
    display: flex;
    gap: var(--space-4);
    flex-wrap: wrap;
    margin-bottom: var(--space-12);
}

.hero-stats {
    display: flex;
    gap: var(--space-8);
    padding-top: var(--space-8);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}
.stat-item { text-align: left; }
.stat-number {
    font-size: var(--text-3xl);
    font-weight: 900;
    color: white;
    line-height: 1;
    margin-bottom: var(--space-1);
    letter-spacing: -0.02em;
}
.stat-number span {
    font-size: var(--text-xl);
    color: var(--color-primary-light);
}
.stat-label {
    font-size: var(--text-xs);
    color: rgba(255, 255, 255, 0.5);
    font-weight: 500;
}

.hero-visual {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}
.hero-product-showcase {
    position: relative;
    width: 100%;
    aspect-ratio: 1;
    max-width: 520px;
    margin-left: auto;
}
.hero-product-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    filter: drop-shadow(0 30px 60px rgba(0, 0, 0, 0.4));
    animation: float 6s ease-in-out infinite;
}
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}
.hero-product-ring {
    position: absolute;
    inset: -10%;
    border: 1px solid rgba(220, 38, 38, 0.2);
    border-radius: 50%;
    animation: rotate 30s linear infinite;
}
.hero-product-ring::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    width: 12px;
    height: 12px;
    background: var(--color-primary);
    border-radius: 50%;
    transform: translateX(-50%);
    box-shadow: 0 0 20px var(--color-primary);
}
@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.hero-floating-badge {
    position: absolute;
    padding: var(--space-3) var(--space-4);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-2xl);
    display: flex;
    align-items: center;
    gap: var(--space-3);
    animation: floatBadge 4s ease-in-out infinite;
}
.hero-floating-badge.badge-1 {
    top: 15%;
    left: -5%;
    animation-delay: 0.5s;
}
.hero-floating-badge.badge-2 {
    bottom: 20%;
    right: -5%;
    animation-delay: 1.5s;
}
@keyframes floatBadge {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}
.floating-badge-icon {
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
    flex-shrink: 0;
}
.floating-badge-text strong {
    display: block;
    font-size: var(--text-sm);
    font-weight: 700;
    color: var(--color-gray-900);
}
.floating-badge-text span {
    font-size: var(--text-xs);
    color: var(--color-gray-500);
}

/* ============================================================
   Section 通用样式
   ============================================================ */
.section-header {
    text-align: center;
    margin-bottom: var(--space-12);
    max-width: 680px;
    margin-left: auto;
    margin-right: auto;
}

.section-tag {
    display: inline-block;
    padding: 0.375rem 0.875rem;
    background: var(--color-primary-50);
    color: var(--color-primary);
    font-size: var(--text-xs);
    font-weight: 700;
    border-radius: var(--radius-full);
    letter-spacing: 0.05em;
    text-transform: uppercase;
    margin-bottom: var(--space-4);
}

.section-title {
    font-size: clamp(1.75rem, 3.5vw, var(--text-4xl));
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-4);
    line-height: 1.2;
}
.section-title .accent {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-desc {
    font-size: var(--text-lg);
    color: var(--color-gray-500);
    line-height: 1.7;
}

.section-cta {
    text-align: center;
    margin-top: var(--space-12);
}

/* ============================================================
   Products Section - 现代产品卡片
   ============================================================ */
.products-section {
    padding: var(--space-24) 0;
    background: var(--color-gray-50);
    position: relative;
}
.products-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-gray-200), transparent);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
}

.product-card {
    background: white;
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all var(--transition-base);
    position: relative;
    border: 1px solid var(--color-gray-100);
}
.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-2xl);
    border-color: transparent;
}

.product-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--radius-xl);
    padding: 2px;
    background: var(--gradient-primary);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity var(--transition-base);
    z-index: 1;
    pointer-events: none;
}
.product-card:hover::before {
    opacity: 1;
}

.product-image {
    position: relative;
    aspect-ratio: 4/3;
    background: linear-gradient(135deg, var(--color-gray-50), var(--color-gray-100));
    overflow: hidden;
}
.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}
.product-card:hover .product-image img {
    transform: scale(1.08);
}

.product-badge {
    position: absolute;
    top: var(--space-4);
    left: var(--space-4);
    z-index: 2;
    padding: 0.375rem 0.75rem;
    font-size: 11px;
    font-weight: 700;
    border-radius: var(--radius-full);
    letter-spacing: 0.05em;
    text-transform: uppercase;
}
.product-badge.hot {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 2px 10px rgba(220, 38, 38, 0.4);
}
.product-badge.new {
    background: linear-gradient(135deg, #10b981, #059669);
    color: white;
    box-shadow: 0 2px 10px rgba(16, 185, 129, 0.4);
}
.product-badge.pro {
    background: linear-gradient(135deg, #6366f1, #4f46e5);
    color: white;
    box-shadow: 0 2px 10px rgba(99, 102, 241, 0.4);
}

.product-info {
    padding: var(--space-5);
    position: relative;
    z-index: 2;
}
.product-category {
    font-size: var(--text-xs);
    font-weight: 600;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-2);
}
.product-name {
    font-size: var(--text-xl);
    font-weight: 800;
    color: var(--color-gray-900);
    margin-bottom: var(--space-2);
    letter-spacing: -0.01em;
}
.product-desc {
    font-size: var(--text-sm);
    color: var(--color-gray-500);
    line-height: 1.6;
    margin-bottom: var(--space-4);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.product-features {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin-bottom: var(--space-5);
}
.product-feature-tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 0.25rem 0.625rem;
    background: var(--color-gray-50);
    color: var(--color-gray-600);
    font-size: 11px;
    font-weight: 500;
    border-radius: var(--radius-sm);
}
.product-feature-tag::before {
    content: '✓';
    color: var(--color-success);
    font-weight: 700;
}

.product-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-sm);
    font-weight: 700;
    color: var(--color-primary);
    transition: gap var(--transition-fast);
}
.product-link:hover {
    gap: var(--space-3);
}

/* ============================================================
   Features Section - 核心优势
   ============================================================ */
.features-section {
    padding: var(--space-24) 0;
    position: relative;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
}

.feature-card {
    padding: var(--space-8);
    background: white;
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-gray-100);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}
.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-base);
}
.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: transparent;
}
.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-icon-wrap {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary-light);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-5);
    transition: all var(--transition-base);
}
.feature-card:hover .feature-icon-wrap {
    background: var(--gradient-primary);
    transform: scale(1.1);
}
.feature-icon {
    width: 28px;
    height: 28px;
    color: var(--color-primary);
    transition: color var(--transition-base);
}
.feature-card:hover .feature-icon {
    color: white;
}

.feature-title {
    font-size: var(--text-xl);
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: var(--space-3);
}
.feature-desc {
    font-size: var(--text-sm);
    color: var(--color-gray-500);
    line-height: 1.7;
}

/* ============================================================
   About Section
   ============================================================ */
.about-section {
    padding: var(--space-24) 0;
    background: var(--color-gray-50);
}
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
    align-items: center;
}
.about-visual {
    position: relative;
}
.about-img-main {
    width: 100%;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-2xl);
}
.about-img-badge {
    position: absolute;
    bottom: var(--space-8);
    right: var(--space-8);
    padding: var(--space-5) var(--space-6);
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-2xl);
    text-align: center;
}
.badge-number {
    font-size: var(--text-3xl);
    font-weight: 900;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}
.badge-text {
    font-size: var(--text-xs);
    color: var(--color-gray-500);
    margin-top: var(--space-1);
    font-weight: 500;
}

.about-content .section-header {
    text-align: left;
    margin-bottom: var(--space-6);
}
.about-desc {
    font-size: var(--text-base);
    color: var(--color-gray-600);
    line-height: 1.8;
    margin-bottom: var(--space-4);
}

.about-advantages {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-4);
    margin: var(--space-8) 0;
}
.advantage-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4);
    background: white;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-gray-100);
}
.advantage-icon {
    width: 36px;
    height: 36px;
    flex-shrink: 0;
    background: var(--color-primary-50);
    color: var(--color-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
}
.advantage-icon svg { width: 18px; height: 18px; }
.advantage-item h4 {
    font-size: var(--text-sm);
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: 2px;
}
.advantage-item p {
    font-size: var(--text-xs);
    color: var(--color-gray-500);
}

/* ============================================================
   Cases Section
   ============================================================ */
.cases-section {
    padding: var(--space-24) 0;
}
.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
}
.case-card {
    padding: var(--space-8);
    background: white;
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-gray-100);
    text-align: center;
    transition: all var(--transition-base);
}
.case-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
    border-color: var(--color-primary-100);
}
.case-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--space-5);
    background: var(--gradient-primary-light);
    color: var(--color-primary);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
}
.case-card:hover .case-icon {
    background: var(--gradient-primary);
    color: white;
    transform: scale(1.1);
}
.case-icon svg { width: 32px; height: 32px; }
.case-title {
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: var(--space-2);
}
.case-desc {
    font-size: var(--text-sm);
    color: var(--color-gray-500);
    line-height: 1.6;
}

/* ============================================================
   FAQ Section
   ============================================================ */
.faq-section {
    padding: var(--space-24) 0;
    background: var(--color-gray-50);
}
.faq-list {
    max-width: 768px;
    margin: 0 auto;
}
.faq-item {
    background: white;
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-3);
    border: 1px solid var(--color-gray-100);
    overflow: hidden;
    transition: all var(--transition-base);
}
.faq-item:hover {
    border-color: var(--color-gray-200);
    box-shadow: var(--shadow-md);
}
.faq-item[open] {
    border-color: var(--color-primary-200);
    box-shadow: var(--shadow-lg);
}
.faq-item summary {
    padding: var(--space-5) var(--space-6);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
    list-style: none;
    user-select: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-question {
    font-size: var(--text-base);
    font-weight: 600;
    color: var(--color-gray-900);
}
.faq-icon {
    width: 28px;
    height: 28px;
    flex-shrink: 0;
    background: var(--color-gray-100);
    color: var(--color-gray-500);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-lg);
    font-weight: 300;
    transition: all var(--transition-base);
}
.faq-item[open] .faq-icon {
    background: var(--color-primary);
    color: white;
    transform: rotate(45deg);
}
.faq-answer {
    padding: 0 var(--space-6) var(--space-5);
    color: var(--color-gray-600);
    font-size: var(--text-sm);
    line-height: 1.8;
}
.faq-answer ul {
    margin-top: var(--space-3);
    padding-left: var(--space-4);
}
.faq-answer li {
    margin-bottom: var(--space-2);
    list-style: disc;
}
.faq-answer strong {
    color: var(--color-gray-900);
    font-weight: 600;
}

/* ============================================================
   CTA Section
   ============================================================ */
.cta-section {
    padding: var(--space-24) 0;
}
.cta-card {
    padding: var(--space-16) var(--space-12);
    background: var(--gradient-primary);
    border-radius: var(--radius-2xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-12);
    color: white;
    position: relative;
    overflow: hidden;
}
.cta-card::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 60%);
    border-radius: 50%;
}
.cta-card::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: 10%;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(0,0,0,0.1) 0%, transparent 60%);
    border-radius: 50%;
}
.cta-content {
    flex: 1;
    position: relative;
    z-index: 1;
}
.cta-content h2 {
    font-size: var(--text-3xl);
    font-weight: 800;
    color: white;
    margin-bottom: var(--space-3);
    letter-spacing: -0.02em;
}
.cta-content > p {
    font-size: var(--text-lg);
    opacity: 0.85;
    margin-bottom: var(--space-6);
}
.cta-contacts {
    display: flex;
    gap: var(--space-8);
    flex-wrap: wrap;
}
.cta-contact {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    color: white;
    padding: var(--space-3) var(--space-4);
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    transition: all var(--transition-base);
}
.cta-contact:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
}
.cta-contact-icon {
    font-size: 1.5rem;
}
.cta-contact-label {
    display: block;
    font-size: var(--text-xs);
    opacity: 0.7;
}
.cta-contact-value {
    display: block;
    font-size: var(--text-base);
    font-weight: 700;
}
.cta-actions {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    flex-shrink: 0;
    position: relative;
    z-index: 1;
}

/* ============================================================
   Footer
   ============================================================ */
.footer {
    background: var(--color-gray-950);
    color: var(--color-gray-400);
    padding-top: var(--space-20);
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: var(--space-12);
    padding-bottom: var(--space-12);
    border-bottom: 1px solid var(--color-gray-800);
}
.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-5);
}
.footer-logo .logo-cn { color: white; }
.footer-logo .logo-en { color: var(--color-gray-500); }

.footer-desc {
    font-size: var(--text-sm);
    line-height: 1.7;
    color: var(--color-gray-500);
    margin-bottom: var(--space-6);
}
.footer-contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}
.footer-contact-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: var(--text-sm);
}
.footer-contact-icon {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-gray-800);
    border-radius: var(--radius-md);
    font-size: 14px;
    flex-shrink: 0;
}

.footer-title {
    font-size: var(--text-sm);
    font-weight: 700;
    color: white;
    margin-bottom: var(--space-5);
    letter-spacing: 0.02em;
}
.footer-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}
.footer-links a {
    font-size: var(--text-sm);
    color: var(--color-gray-500);
    transition: all var(--transition-fast);
    display: inline-block;
}
.footer-links a:hover {
    color: var(--color-primary-light);
    transform: translateX(4px);
}

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-6) 0;
    font-size: var(--text-xs);
    color: var(--color-gray-600);
}
.footer-copyright p { margin-bottom: var(--space-1); }
.footer-copyright a { color: var(--color-gray-500); }
.footer-bottom-links {
    display: flex;
    gap: var(--space-6);
}
.footer-bottom-links a {
    color: var(--color-gray-500);
    transition: color var(--transition-fast);
}
.footer-bottom-links a:hover { color: var(--color-primary-light); }

/* ============================================================
   辅助组件
   ============================================================ */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 48px;
    height: 48px;
    background: white;
    color: var(--color-gray-700);
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-sticky);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--transition-base);
    border: 1px solid var(--color-gray-100);
}
.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.back-to-top:hover {
    background: var(--color-primary);
    color: white;
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}
.back-to-top svg { width: 20px; height: 20px; }

.floating-contact {
    position: fixed;
    right: 2rem;
    bottom: 5rem;
    z-index: var(--z-sticky);
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}
.floating-btn {
    width: 52px;
    height: 52px;
    background: white;
    color: var(--color-gray-700);
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
    border: 1px solid var(--color-gray-100);
}
.floating-btn:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-xl);
}
.floating-btn svg { width: 22px; height: 22px; }
.floating-btn-primary {
    background: var(--gradient-primary);
    color: white;
    border: none;
    box-shadow: 0 4px 20px rgba(220, 38, 38, 0.4);
}
.floating-btn-primary:hover {
    box-shadow: 0 6px 30px rgba(220, 38, 38, 0.5);
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1024px) {
    .products-grid,
    .features-grid,
    .cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .about-grid {
        grid-template-columns: 1fr;
        gap: var(--space-12);
    }
    .about-visual { max-width: 560px; margin: 0 auto; }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-8);
    }
    .footer-brand { grid-column: 1 / -1; }
    .cta-card {
        flex-direction: column;
        text-align: center;
        padding: var(--space-12) var(--space-8);
    }
    .cta-contacts { justify-content: center; }
    .cta-actions { flex-direction: row; }
}

@media (max-width: 768px) {
    :root {
        --space-24: 4rem;
        --space-16: 3rem;
        --space-12: 2.5rem;
    }
    
    .nav-menu,
    .nav-cta { display: none; }
    .mobile-menu-btn { display: flex; }
    
    .hero .container {
        grid-template-columns: 1fr;
        padding-top: var(--space-12);
        padding-bottom: var(--space-12);
    }
    .hero-visual { display: none; }
    .hero-value-props { grid-template-columns: 1fr; }
    .hero-stats {
        gap: var(--space-6);
        flex-wrap: wrap;
    }
    
    .products-grid,
    .features-grid,
    .cases-grid {
        grid-template-columns: 1fr;
        max-width: 440px;
        margin: 0 auto;
    }
    
    .about-advantages { grid-template-columns: 1fr; }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-6);
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--space-4);
        text-align: center;
    }
    
    .cta-card { padding: var(--space-8) var(--space-5); }
    .cta-content h2 { font-size: var(--text-2xl); }
    .cta-contacts {
        flex-direction: column;
        gap: var(--space-3);
    }
    .cta-actions {
        flex-direction: column;
        width: 100%;
    }
    .cta-actions .btn { width: 100%; }
    
    .back-to-top { right: 1rem; bottom: 1rem; }
    .floating-contact { right: 1rem; bottom: 4rem; }
}

/* 移动端菜单 */
.mobile-nav {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: var(--z-modal);
    backdrop-filter: blur(4px);
}
.mobile-nav.open { display: block; }
.mobile-nav-panel {
    position: absolute;
    top: 0;
    right: 0;
    width: 85%;
    max-width: 320px;
    height: 100%;
    background: white;
    padding: var(--space-6);
    transform: translateX(100%);
    transition: transform var(--transition-base);
    overflow-y: auto;
}
.mobile-nav.open .mobile-nav-panel { transform: translateX(0); }
.mobile-nav-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-8);
}
.mobile-nav-close {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    color: var(--color-gray-500);
    font-size: var(--text-xl);
}
.mobile-nav-close:hover {
    background: var(--color-gray-100);
    color: var(--color-gray-900);
}
.mobile-nav-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}
.mobile-nav-links a {
    display: block;
    padding: var(--space-4);
    font-size: var(--text-lg);
    font-weight: 500;
    color: var(--color-gray-700);
    border-radius: var(--radius-md);
}
.mobile-nav-links a:hover,
.mobile-nav-links a.active {
    background: var(--color-primary-50);
    color: var(--color-primary);
}
.mobile-nav-cta {
    margin-top: var(--space-8);
    padding-top: var(--space-6);
    border-top: 1px solid var(--color-gray-100);
}
.mobile-nav-cta .btn { width: 100%; }

/* ========== 产品中心页 - 完整产品展示 ========== */
.products-main { padding: var(--space-8) 0 var(--space-12); }

.product-filter {
    display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: var(--space-8);
    padding: var(--space-3) 0; border-bottom: 1px solid var(--color-gray-100);
}
.filter-btn {
    padding: 8px 20px; border: 2px solid var(--color-gray-200); background: transparent;
    color: var(--color-gray-700); border-radius: 25px; font-size: 14px; cursor: pointer;
    transition: all var(--transition-fast); font-weight: 500;
}
.filter-btn:hover { border-color: var(--color-primary); color: var(--color-primary); }
.filter-btn.active { background: var(--color-primary); border-color: var(--color-primary); color: #fff; }

.product-full {
    display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-8);
    margin-bottom: var(--space-10); padding: var(--space-6) 0;
    border-bottom: 1px solid var(--color-gray-100); align-items: start;
}
.product-full:nth-child(even) .product-full-image { order: 2; }
.product-full:nth-child(even) .product-full-content { order: 1; }
.product-full-image { position: relative; }
.product-full-image img {
    width: 100%; height: auto; border-radius: 12px; display: block;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}
.product-full-content { display: flex; flex-direction: column; gap: var(--space-3); }
.product-full-category {
    display: inline-block; width: fit-content; padding: 4px 12px;
    background: var(--color-primary-50); color: var(--color-primary);
    border-radius: 4px; font-size: 13px; font-weight: 600;
}
.product-full-title { font-size: var(--text-2xl); font-weight: 800; color: var(--color-gray-900); margin: 0; }
.product-full-desc { font-size: 15px; line-height: 1.7; color: var(--color-gray-600); margin: 0; }

.selling-points { display: flex; flex-wrap: wrap; gap: 8px; }
.selling-point {
    padding: 5px 14px; background: var(--color-gray-50); border: 1px solid var(--color-gray-200);
    border-radius: 6px; font-size: 13px; color: var(--color-gray-700); font-weight: 500;
}

.specs-block { margin-top: var(--space-2); }
.specs-block-title {
    font-size: 15px; font-weight: 700; color: var(--color-gray-900);
    margin-bottom: var(--space-2); padding-bottom: 6px; border-bottom: 2px solid var(--color-primary);
}
.specs-block table { width: 100%; border-collapse: collapse; font-size: 14px; }
.specs-block thead { background: var(--color-gray-50); }
.specs-block th, .specs-block td {
    padding: 8px 12px; text-align: left; border: 1px solid var(--color-gray-100);
}
.specs-block thead th { font-weight: 600; color: var(--color-gray-700); }
.specs-block tbody th { font-weight: 500; color: var(--color-gray-600); width: 40%; background: var(--color-gray-50); }
.specs-block tbody td { color: var(--color-gray-800); }

.product-actions-row {
    display: flex; gap: 12px; margin-top: var(--space-3); flex-wrap: wrap;
}

@media (max-width: 768px) {
    .product-full { grid-template-columns: 1fr; gap: var(--space-4); }
    .product-full:nth-child(even) .product-full-image { order: 0; }
    .product-full:nth-child(even) .product-full-content { order: 0; }
    .specs-block th, .specs-block td { padding: 6px 8px; font-size: 13px; }
    .product-filter { gap: 6px; }
    .filter-btn { padding: 6px 14px; font-size: 13px; }
}

/* 滚动动画 */
.reveal {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.4s ease, transform 0.4s ease;
}
.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}