/* ============================================
   3mob 营销型网站样式 - 参考 nasimobi.com
   ============================================ */

/* CSS 变量 - 主题系统 */
:root {
    /* 浅色主题 Light Theme */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --border-color: #e2e8f0;
    --card-bg: #ffffff;
    --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);

    /* 品牌色 Brand Colors */
    --brand-primary: #f97316;
    --brand-secondary: #ea580c;
    --brand-gradient: linear-gradient(135deg, #f97316 0%, #ea580c 100%);
    --accent-blue: #0ea5e9;
    --accent-purple: #8b5cf6;
    --accent-cyan: #06b6d4;

    /* 深色背景渐变 */
    --hero-gradient: linear-gradient(135deg, #0a0f1a 0%, #1a1f35 50%, #0d1525 100%);
    --dark-gradient: linear-gradient(180deg, #0f172a 0%, #1e293b 100%);
    --dark-overlay: rgba(10, 15, 26, 0.95);

    /* 间距 */
    --section-padding: 120px;
    --container-max: 1280px;

    /* 字体 */
    --font-display: 'Orbitron', sans-serif;
    --font-serif: 'Noto Serif SC', Georgia, serif;
    --font-sans: 'Noto Sans SC', Tahoma, Arial, sans-serif;

    /* 动画 */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* 深色主题 Dark Theme */
[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #64748b;
    --border-color: #334155;
    --card-bg: #1e293b;
    --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -2px rgba(0, 0, 0, 0.2);
}

/* ============================================
   基础样式 Base Styles
   ============================================ */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    transition: background-color var(--transition-normal), color var(--transition-normal);
    overflow-x: hidden;
}

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

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

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast);
}

/* ============================================
   导航栏 Navigation
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 20px 0;
    background: transparent;
    transition: all var(--transition-normal);
}

.navbar.scrolled {
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(20px);
    box-shadow: 0 2px 30px rgba(0, 0, 0, 0.3);
    padding: 12px 0;
}

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 700;
    font-size: 1.5rem;
}

.logo-icon {
    width: 44px;
    height: 44px;
    background: var(--brand-gradient);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 800;
    font-size: 1.5rem;
    font-family: var(--font-display);
}

.logo-text {
    color: white;
    font-family: var(--font-display);
    letter-spacing: 2px;
}

.navbar.scrolled .logo-text {
    color: white;
}

.nav-links {
    display: flex;
    gap: 36px;
}

.nav-link {
    font-size: 0.9rem;
    font-weight: 500;
    position: relative;
    padding: 8px 0;
    color: rgba(255, 255, 255, 0.8);
    letter-spacing: 0.5px;
}

.nav-link:hover {
    color: white;
}

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

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.action-btn {
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.1);
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    font-size: 1rem;
    backdrop-filter: blur(10px);
}

.action-btn:hover {
    background: var(--brand-primary);
    transform: translateY(-2px);
}

.lang-text {
    font-weight: 600;
    font-size: 0.85rem;
}

.menu-btn {
    display: none;
}

/* ============================================
   Hero 区域 - nasimobi 风格
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    background: var(--hero-gradient);
}

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

.hero-gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.6;
}

.orb-1 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(249, 115, 22, 0.4) 0%, transparent 70%);
    top: -200px;
    left: -200px;
    animation: float-orb 15s ease-in-out infinite;
}

.orb-2 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(14, 165, 233, 0.3) 0%, transparent 70%);
    bottom: -150px;
    right: -100px;
    animation: float-orb 18s ease-in-out infinite reverse;
}

.orb-3 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.25) 0%, transparent 70%);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation: pulse-orb 10s ease-in-out infinite;
}

@keyframes float-orb {

    0%,
    100% {
        transform: translate(0, 0);
    }

    50% {
        transform: translate(30px, -30px);
    }
}

@keyframes pulse-orb {

    0%,
    100% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 0.6;
    }

    50% {
        transform: translate(-50%, -50%) scale(1.2);
        opacity: 0.3;
    }
}

.hero-grid-pattern {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 60px 60px;
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 1000px;
    padding: 0 24px;
}

.hero-main-title {
    margin-bottom: 32px;
}

.title-line-1 {
    display: block;
    font-family: var(--font-display);
    font-size: clamp(3rem, 10vw, 7rem);
    font-weight: 900;
    color: white;
    letter-spacing: 8px;
    line-height: 1.1;
    text-shadow: 0 0 60px rgba(249, 115, 22, 0.5);
    animation: glow-text 3s ease-in-out infinite;
}

.title-line-2 {
    display: block;
    font-family: var(--font-display);
    font-size: clamp(1.5rem, 4vw, 3rem);
    font-weight: 600;
    background: var(--brand-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 6px;
    margin-top: 16px;
}

@keyframes glow-text {

    0%,
    100% {
        text-shadow: 0 0 60px rgba(249, 115, 22, 0.5);
    }

    50% {
        text-shadow: 0 0 100px rgba(249, 115, 22, 0.8), 0 0 150px rgba(249, 115, 22, 0.4);
    }
}

.hero-subtitle {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.7);
    max-width: 600px;
    margin: 0 auto 48px;
    line-height: 1.8;
}

.hero-cta {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 16px 36px;
    border-radius: 60px;
    font-weight: 600;
    font-size: 1rem;
    transition: all var(--transition-normal);
    border: none;
    cursor: pointer;
    letter-spacing: 0.5px;
}

.btn-primary {
    background: var(--brand-gradient);
    color: white;
    box-shadow: 0 8px 30px rgba(249, 115, 22, 0.4);
}

.btn-primary:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(249, 115, 22, 0.6);
}

.btn-outline {
    background: transparent;
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-4px);
}

.btn-full {
    width: 100%;
    justify-content: center;
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
}

.mouse {
    width: 26px;
    height: 42px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 20px;
    position: relative;
}

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

@keyframes scroll-wheel {
    0% {
        transform: translateX(-50%) translateY(0);
        opacity: 1;
    }

    100% {
        transform: translateX(-50%) translateY(16px);
        opacity: 0;
    }
}

/* ============================================
   通用区块样式 Section Styles
   ============================================ */
.section {
    padding: var(--section-padding) 0;
}

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

.section-header.center {
    text-align: center;
}

.section-tag {
    display: inline-block;
    padding: 10px 24px;
    background: rgba(249, 115, 22, 0.1);
    color: var(--brand-primary);
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 20px;
    letter-spacing: 1px;
}

.section-tag.light {
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 16px;
    letter-spacing: 2px;
}

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

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

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

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

.about-content .section-title {
    color: var(--brand-primary);
    margin-bottom: 32px;
}

.about-text {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.9;
    margin-bottom: 20px;
}

.about-content .btn {
    margin-top: 20px;
}

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

.about-stat-card {
    background: var(--dark-gradient);
    padding: 36px 28px;
    border-radius: 20px;
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-normal);
}

.about-stat-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.about-stat-card .stat-number {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 800;
    color: white;
    display: inline;
}

.about-stat-card .stat-plus {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    color: var(--brand-primary);
}

.about-stat-card .stat-label {
    display: block;
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
    margin-top: 8px;
}

/* ============================================
   产品中心 Products
   ============================================ */
.products {
    background: var(--hero-gradient);
    color: white;
}

.product-title-wrapper {
    margin-bottom: 24px;
}

.product-main-title {
    font-family: var(--font-display);
    font-size: clamp(4rem, 12vw, 8rem);
    font-weight: 900;
    color: rgba(255, 255, 255, 0.1);
    letter-spacing: 10px;
    line-height: 0.9;
}

.product-sub-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 6vw, 4rem);
    font-weight: 700;
    letter-spacing: 6px;
    color: white;
}

.product-sub-title.highlight {
    background: var(--brand-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.products .section-desc {
    color: rgba(255, 255, 255, 0.7);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    margin-top: 60px;
}

.product-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 24px;
    padding: 40px;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

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

.product-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.4);
    background: rgba(255, 255, 255, 0.08);
}

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

.product-icon {
    width: 70px;
    height: 70px;
    background: var(--brand-gradient);
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
}

.product-icon i {
    font-size: 2rem;
    color: white;
}

.product-name {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.product-tag {
    color: var(--brand-primary);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.product-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: rgba(255, 255, 255, 0.8);
    font-weight: 500;
    transition: all var(--transition-fast);
}

.product-link:hover {
    color: var(--brand-primary);
    gap: 12px;
}

.product-slogan {
    color: rgba(255, 255, 255, 0.6);
    font-style: italic;
}

/* DSP Stats */
.dsp-stats {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-top: 24px;
}

.dsp-stat {
    flex: 1;
    min-width: 80px;
}

.dsp-number {
    display: block;
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--brand-primary);
}

.dsp-label {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.6);
}

/* Apps Grid */
.apps-grid {
    margin-top: 20px;
}

.app-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.8);
}

.app-item:last-child {
    border-bottom: none;
}

.app-item i {
    color: var(--brand-primary);
}

/* ============================================
   CTV Section
   ============================================ */
.ctv-section {
    background: var(--bg-secondary);
}

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

.ctv-card {
    background: var(--card-bg);
    padding: 36px 28px;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    text-align: center;
    transition: all var(--transition-normal);
}

.ctv-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    border-color: var(--brand-primary);
}

.ctv-icon {
    width: 64px;
    height: 64px;
    background: var(--brand-gradient);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.ctv-icon i {
    font-size: 1.75rem;
    color: white;
}

.ctv-card h4 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.ctv-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* ============================================
   服务模块 Services
   ============================================ */
.services {
    background: var(--bg-primary);
}

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

.service-card {
    background: var(--card-bg);
    border-radius: 24px;
    padding: 40px 28px;
    box-shadow: var(--card-shadow);
    transition: all var(--transition-normal);
    border: 1px solid var(--border-color);
    text-align: center;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15);
}

.service-icon {
    width: 72px;
    height: 72px;
    background: var(--brand-gradient);
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
}

.service-icon i {
    font-size: 2rem;
    color: white;
}

.service-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.service-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* ============================================
   荣誉奖项 Awards
   ============================================ */
.awards {
    background: var(--hero-gradient);
    color: white;
}

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

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

.award-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: 36px 28px;
    text-align: center;
    transition: all var(--transition-normal);
}

.award-card:hover {
    transform: translateY(-8px);
    background: rgba(255, 255, 255, 0.1);
}

.award-icon {
    width: 64px;
    height: 64px;
    background: var(--brand-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.award-icon i {
    font-size: 1.5rem;
    color: white;
}

.award-card h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 12px;
    line-height: 1.5;
}

.award-year {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(249, 115, 22, 0.2);
    color: var(--brand-primary);
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

/* ============================================
   合作品牌 Brands
   ============================================ */
.brands {
    background: var(--bg-secondary);
}

.brands-marquee {
    overflow: hidden;
    padding: 40px 0;
}

.marquee-track {
    display: flex;
    gap: 40px;
    animation: marquee 30s linear infinite;
}

@keyframes marquee {
    0% {
        transform: translateX(0);
    }

    100% {
        transform: translateX(-50%);
    }
}

.brand-logo {
    flex-shrink: 0;
    padding: 20px 40px;
    background: var(--card-bg);
    border-radius: 16px;
    border: 1px solid var(--border-color);
    transition: all var(--transition-fast);
}

.brand-logo:hover {
    transform: scale(1.05);
    border-color: var(--brand-primary);
}

.brand-logo span {
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text-secondary);
}

/* ============================================
   联系我们 Contact
   ============================================ */
.contact {
    background: var(--hero-gradient);
    color: white;
}

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

.contact-title {
    font-family: var(--font-display);
    font-size: 3rem;
    letter-spacing: 4px;
    margin-bottom: 40px;
}

.contact-cards {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-card {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 24px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-fast);
}

.contact-card:hover {
    background: rgba(255, 255, 255, 0.1);
}

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

.contact-icon i {
    font-size: 1.25rem;
    color: white;
}

.contact-card h4 {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 4px;
}

.contact-card a {
    color: white;
    font-weight: 500;
}

.contact-card a:hover {
    color: var(--brand-primary);
}

.contact-form-wrapper {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px);
    border-radius: 24px;
    padding: 48px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.contact-form-wrapper h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    letter-spacing: 2px;
    margin-bottom: 32px;
}

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 16px 20px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 12px;
    color: white;
    font-size: 1rem;
    font-family: var(--font-sans);
    transition: all var(--transition-fast);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--brand-primary);
    background: rgba(255, 255, 255, 0.12);
}

/* ============================================
   页脚 Footer
   ============================================ */
.footer {
    background: #0a0f1a;
    color: white;
    padding: 80px 0 30px;
}

.footer-top {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 60px;
}

.footer-brand .nav-logo {
    margin-bottom: 20px;
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 24px;
}

.social-links {
    display: flex;
    gap: 12px;
}

.social-link {
    width: 44px;
    height: 44px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    transition: all var(--transition-fast);
}

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

.footer-links h4 {
    font-size: 1rem;
    margin-bottom: 24px;
    color: white;
}

.footer-links a,
.footer-links span {
    display: block;
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
    margin-bottom: 14px;
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.875rem;
}

.footer-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

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

/* ============================================
   响应式设计 Responsive
   ============================================ */
@media (max-width: 1024px) {

    .about-wrapper,
    .contact-wrapper {
        grid-template-columns: 1fr;
        gap: 60px;
    }

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

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

    .footer-top {
        grid-template-columns: repeat(2, 1fr);
        gap: 40px;
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 80px;
    }

    .nav-links {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(15, 23, 42, 0.98);
        backdrop-filter: blur(20px);
        padding: 100px 40px;
        flex-direction: column;
        gap: 0;
        z-index: 999;
    }

    .nav-links.active {
        display: flex;
    }

    .nav-link {
        padding: 20px 0;
        font-size: 1.25rem;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    .menu-btn {
        display: flex;
        width: 44px;
        height: 44px;
        border: none;
        border-radius: 12px;
        background: rgba(255, 255, 255, 0.1);
        color: white;
        cursor: pointer;
        align-items: center;
        justify-content: center;
        z-index: 1001;
    }

    .title-line-1 {
        letter-spacing: 4px;
    }

    .title-line-2 {
        letter-spacing: 2px;
    }

    .products-grid,
    .services-grid,
    .ctv-grid,
    .awards-grid {
        grid-template-columns: 1fr;
    }

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

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

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

    .footer-bottom {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .title-line-1 {
        font-size: 2.5rem;
    }

    .title-line-2 {
        font-size: 1.2rem;
    }

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

    .btn {
        width: 100%;
        justify-content: center;
    }

    .about-stats-grid {
        grid-template-columns: 1fr;
    }

    .dsp-stats {
        flex-direction: column;
    }
}

/* ============================================
   动画效果 Animations
   ============================================ */
.fade-in {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 深色模式适配 */
[data-theme="dark"] .about {
    background: var(--bg-primary);
}

[data-theme="dark"] .ctv-section {
    background: var(--bg-secondary);
}

[data-theme="dark"] .services {
    background: var(--bg-primary);
}

[data-theme="dark"] .brands {
    background: var(--bg-secondary);
}