/* ========================================
   ColidbuMCP 网站全局样式表
   Global Stylesheet with Poki-style Rich Animations
   ======================================== */

/* Root CSS 变量 Variables */
:root {
    --color-primary: #FF6B6B;
    --color-secondary: #4ECDC4;
    --color-tertiary: #45B7D1;
    --color-accent: #F8B500;
    --color-dark: #2D3436;
    --color-light: #F5F7FA;
    --color-white: #FFFFFF;
    --color-text: #333333;
    --color-border: #E0E0E0;
    
    --transition-smooth: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --transition-bounce: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* ========================================
   基础样式 Base Styles
   ======================================== */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--color-text);
    background-color: var(--color-white);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ========================================
   导航栏 Navigation Bar
   ======================================== */

.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    animation: slideDown 0.6s ease-out;
}

@keyframes slideDown {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    text-decoration: none;
    cursor: pointer;
    animation: popIn 0.6s cubic-bezier(0.68, -0.55, 0.265, 1.55) 0.2s both;
}

@keyframes popIn {
    0% {
        transform: scale(0) rotate(-180deg);
        opacity: 0;
    }
    100% {
        transform: scale(1) rotate(0deg);
        opacity: 1;
    }
}

.logo {
    width: 50px;
    height: 50px;
    animation: spin 20s linear infinite;
}

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

.brand-name {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--color-white);
    letter-spacing: 0.5px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    color: var(--color-white);
    text-decoration: none;
    font-weight: 600;
    position: relative;
    transition: var(--transition-smooth);
}

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

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

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--color-white);
    margin: 5px 0;
    transition: var(--transition-smooth);
    border-radius: 2px;
}

/* ========================================
   Hero 部分 Hero Section
   ======================================== */

.hero {
    margin-top: 80px;
    padding: 6rem 2rem;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 50%, var(--color-tertiary) 100%);
    color: var(--color-white);
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 4rem;
    position: relative;
    overflow: hidden;
    min-height: calc(100vh - 80px);
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 1px, transparent 1px);
    background-size: 20px 20px;
    animation: moveBackground 20s linear infinite;
}

@keyframes moveBackground {
    0% { transform: translate(0, 0); }
    100% { transform: translate(20px, 20px); }
}

.hero-content {
    position: relative;
    z-index: 2;
    animation: slideInLeft 0.8s ease-out;
}

@keyframes slideInLeft {
    from {
        transform: translateX(-100px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 900;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.3);
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

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

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    font-weight: 300;
    animation: fadeInUp 0.8s ease-out 0.4s both;
}

.hero-description {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    line-height: 1.8;
    animation: fadeInUp 0.8s ease-out 0.6s both;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    animation: fadeInUp 0.8s ease-out 0.8s both;
}

.hero-animation {
    position: relative;
    height: 400px;
    z-index: 2;
}

.floating-element {
    position: absolute;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    animation: float 6s ease-in-out infinite;
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.el-1 {
    width: 80px;
    height: 80px;
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.el-2 {
    width: 120px;
    height: 120px;
    top: 30%;
    right: 5%;
    animation-delay: 1s;
}

.el-3 {
    width: 60px;
    height: 60px;
    bottom: 20%;
    left: 20%;
    animation-delay: 2s;
}

.el-4 {
    width: 100px;
    height: 100px;
    bottom: 10%;
    right: 15%;
    animation-delay: 1.5s;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px) rotate(0deg);
    }
    50% {
        transform: translateY(-30px) rotate(180deg);
    }
}

/* ========================================
   按钮样式 Button Styles
   ======================================== */

.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    transition: var(--transition-bounce);
    cursor: pointer;
    border: 2px solid transparent;
    font-size: 1rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-tertiary));
    color: var(--color-white);
}

.btn-primary:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 24px rgba(255, 107, 107, 0.4);
}

.btn-secondary {
    background: var(--color-white);
    color: var(--color-primary);
    border-color: var(--color-white);
}

.btn-secondary:hover {
    background: transparent;
    color: var(--color-white);
    transform: scale(1.05);
}

/* ========================================
   容器和网格 Container & Grid
   ======================================== */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* ========================================
   特性部分 Features Section
   ======================================== */

.features {
    padding: 6rem 2rem;
    background: linear-gradient(to bottom, var(--color-light), var(--color-white));
}

.features h2,
.our-games h2,
.service-packages h2,
.faq-section h2 {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
    animation: slideInDown 0.6s ease-out;
}

@keyframes slideInDown {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.features h2::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    margin: 1rem auto 0;
    border-radius: 2px;
    animation: expandWidth 0.8s ease-out;
}

@keyframes expandWidth {
    from {
        width: 0;
    }
    to {
        width: 80px;
    }
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--color-white);
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    transition: var(--transition-bounce);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    animation: scaleIn 0.6s ease-out both;
}

@keyframes scaleIn {
    from {
        transform: scale(0.8);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

.feature-card:nth-child(1) { animation-delay: 0.1s; }
.feature-card:nth-child(2) { animation-delay: 0.2s; }
.feature-card:nth-child(3) { animation-delay: 0.3s; }
.feature-card:nth-child(4) { animation-delay: 0.4s; }
.feature-card:nth-child(5) { animation-delay: 0.5s; }
.feature-card:nth-child(6) { animation-delay: 0.6s; }

.feature-card:hover {
    transform: translateY(-15px) scale(1.02);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: spin 3s linear infinite;
}

.feature-card:hover .feature-icon {
    animation: pulse 0.6s ease-out;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.feature-icon svg {
    width: 40px;
    height: 40px;
}

.feature-card h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--color-primary);
}

.feature-card p {
    color: #666;
    line-height: 1.6;
}

/* ========================================
   服务部分 Services Section
   ======================================== */

.page-header {
    margin-top: 80px;
    padding: 4rem 2rem;
    background: linear-gradient(135deg, var(--color-primary), var(--color-tertiary));
    color: var(--color-white);
    text-align: center;
    animation: fadeIn 0.8s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.page-header h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.page-header p {
    font-size: 1.1rem;
}

.services-main {
    padding: 6rem 2rem;
    background: linear-gradient(to bottom, var(--color-light), var(--color-white));
}

.service-section {
    margin-bottom: 4rem;
}

.service-section h2 {
    font-size: 2rem;
    margin-bottom: 2rem;
    position: relative;
}

.service-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.service-card {
    background: var(--color-white);
    border-radius: 12px;
    padding: 2rem;
    transition: var(--transition-bounce);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
    border-left: 4px solid var(--color-primary);
    animation: slideInRight 0.6s ease-out both;
}

@keyframes slideInRight {
    from {
        transform: translateX(50px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.service-card:nth-child(odd) { animation-delay: 0.1s; }
.service-card:nth-child(even) { animation-delay: 0.2s; }
.service-card:nth-child(3n) { animation-delay: 0.3s; }

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
    border-left-color: var(--color-secondary);
}

.service-icon {
    width: 60px;
    height: 60px;
    margin-bottom: 1rem;
}

.service-card h3 {
    color: var(--color-primary);
    font-size: 1.2rem;
    margin-bottom: 1rem;
}

.service-features {
    list-style: none;
    margin-top: 1rem;
}

.service-features li {
    padding: 0.4rem 0;
    color: #666;
    font-size: 0.9rem;
    border-bottom: 1px solid var(--color-border);
    animation: slideInLeft 0.4s ease-out backwards;
}

.service-features li:hover {
    padding-left: 0.5rem;
    color: var(--color-primary);
}

/* ========================================
   统计部分 Stats Section
   ======================================== */

.stats {
    padding: 4rem 2rem;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: var(--color-white);
}

.stats .container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 3rem;
    text-align: center;
}

.stat-item {
    animation: countUp 2s ease-out;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 900;
    margin-bottom: 0.5rem;
    animation: slideInUp 0.8s ease-out;
}

.stat-item p {
    font-size: 1.1rem;
    font-weight: 300;
}

/* ========================================
   联系表单 Contact Form
   ======================================== */

.contact-section {
    padding: 6rem 2rem;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.contact-info h2 {
    font-size: 2rem;
    margin-bottom: 2rem;
    color: var(--color-primary);
}

.contact-item {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    animation: slideInLeft 0.6s ease-out both;
}

.contact-item:nth-child(1) { animation-delay: 0.1s; }
.contact-item:nth-child(2) { animation-delay: 0.2s; }
.contact-item:nth-child(3) { animation-delay: 0.3s; }

.contact-icon {
    width: 60px;
    height: 60px;
    min-width: 60px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.contact-icon svg {
    width: 30px;
    height: 30px;
}

.contact-item h3 {
    color: var(--color-primary);
    margin-bottom: 0.3rem;
}

.contact-desc {
    font-size: 0.9rem;
    color: #999;
}

.contact-form-wrapper {
    background: linear-gradient(135deg, var(--color-light), var(--color-white));
    padding: 2.5rem;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    animation: slideInRight 0.8s ease-out;
}

.contact-form {
    display: flex;
    flex-direction: column;
}

.form-group {
    display: flex;
    flex-direction: column;
    margin-bottom: 1.5rem;
    animation: fadeInUp 0.6s ease-out backwards;
}

.form-group:nth-child(1) { animation-delay: 0.1s; }
.form-group:nth-child(2) { animation-delay: 0.2s; }
.form-group:nth-child(3) { animation-delay: 0.3s; }
.form-group:nth-child(4) { animation-delay: 0.4s; }
.form-group:nth-child(5) { animation-delay: 0.5s; }
.form-group:nth-child(6) { animation-delay: 0.6s; }

.form-group label {
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 0.5rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 0.8rem;
    border: 2px solid var(--color-border);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition-smooth);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(255, 107, 107, 0.1);
}

.form-group textarea {
    resize: vertical;
}

.form-group.checkbox {
    flex-direction: row;
    align-items: center;
    gap: 0.8rem;
}

.form-group.checkbox input {
    width: 20px;
    height: 20px;
    margin: 0;
}

.form-group.checkbox label {
    margin-bottom: 0;
}

.form-error {
    color: var(--color-primary);
    font-size: 0.85rem;
    margin-top: 0.3rem;
    display: none;
}

.submit-btn {
    margin-top: 1rem;
    animation: slideInUp 0.8s ease-out 0.7s both;
}

.form-response {
    margin-top: 1rem;
    padding: 1rem;
    border-radius: 8px;
    display: none;
    animation: slideInUp 0.4s ease-out;
}

.form-response.success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
    display: block;
}

.form-response.error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
    display: block;
}

/* ========================================
   FAQ 部分 FAQ Section
   ======================================== */

.faq-section {
    padding: 6rem 2rem;
    background: var(--color-light);
}

.faq-section h2 {
    margin-bottom: 3rem;
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.faq-item {
    background: var(--color-white);
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    transition: var(--transition-bounce);
    animation: scaleIn 0.6s ease-out both;
    cursor: pointer;
}

.faq-item:nth-child(1) { animation-delay: 0.1s; }
.faq-item:nth-child(2) { animation-delay: 0.15s; }
.faq-item:nth-child(3) { animation-delay: 0.2s; }
.faq-item:nth-child(4) { animation-delay: 0.25s; }
.faq-item:nth-child(5) { animation-delay: 0.3s; }
.faq-item:nth-child(6) { animation-delay: 0.35s; }

.faq-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.12);
}

.faq-item h3 {
    color: var(--color-primary);
    margin-bottom: 0.8rem;
    font-size: 1.1rem;
}

.faq-item p {
    color: #666;
    line-height: 1.6;
}

/* ========================================
   服务包 Service Packages
   ======================================== */

.service-packages {
    padding: 6rem 2rem;
    background: linear-gradient(to bottom, var(--color-white), var(--color-light));
}

.packages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.package {
    background: var(--color-white);
    padding: 2rem;
    border-radius: 12px;
    border: 2px solid var(--color-border);
    text-align: center;
    transition: var(--transition-bounce);
    position: relative;
    animation: slideInUp 0.6s ease-out both;
}

.package:nth-child(1) { animation-delay: 0.1s; }
.package:nth-child(2) { animation-delay: 0.2s; }
.package:nth-child(3) { animation-delay: 0.3s; }

.package.featured {
    transform: scale(1.05);
    border-color: var(--color-primary);
    box-shadow: 0 15px 40px rgba(255, 107, 107, 0.2);
}

.featured-badge {
    position: absolute;
    top: -12px;
    right: 20px;
    background: var(--color-primary);
    color: var(--color-white);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 700;
    animation: popIn 0.6s cubic-bezier(0.68, -0.55, 0.265, 1.55) 0.3s both;
}

.package:hover:not(.featured) {
    transform: translateY(-10px);
    border-color: var(--color-secondary);
}

.package h3 {
    font-size: 1.5rem;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
}

.package .price {
    color: #999;
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
}

.package ul {
    list-style: none;
    margin-bottom: 2rem;
    text-align: left;
}

.package li {
    padding: 0.6rem 0;
    color: #666;
    border-bottom: 1px solid var(--color-border);
    position: relative;
    padding-left: 1.5rem;
}

.package li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-secondary);
    font-weight: bold;
}

/* ========================================
   我们的游戏 Our Games
   ======================================== */

.our-games {
    padding: 6rem 2rem;
    background: linear-gradient(to bottom, var(--color-light), var(--color-white));
}

.section-intro {
    text-align: center;
    font-size: 1.1rem;
    color: #666;
    margin-bottom: 3rem;
}

.games-showcase {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.game-placeholder {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    padding: 2rem;
    border-radius: 15px;
    color: var(--color-white);
    text-align: center;
    transition: var(--transition-bounce);
    animation: fadeInUp 0.8s ease-out;
}

.game-placeholder:hover {
    transform: scale(1.05);
    box-shadow: 0 15px 40px rgba(255, 107, 107, 0.3);
}

.game-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

.store-link {
    display: inline-block;
    margin: 0.5rem;
    padding: 0.6rem 1.2rem;
    background: var(--color-white);
    color: var(--color-primary);
    text-decoration: none;
    border-radius: 25px;
    font-weight: 600;
    transition: var(--transition-smooth);
}

.store-link:hover {
    background: var(--color-light);
    transform: scale(1.05);
}

/* ========================================
   隐私政策/服务条款 Policy Sections
   ======================================== */

.policy-section {
    padding: 6rem 2rem;
    margin-top: 80px;
    background: linear-gradient(to bottom, var(--color-light), var(--color-white));
}

.policy-container {
    max-width: 900px;
    margin: 0 auto;
}

.policy-section h1 {
    font-size: 2.5rem;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
    animation: slideInDown 0.6s ease-out;
}

.last-updated {
    color: #999;
    font-size: 0.9rem;
    margin-bottom: 3rem;
    animation: fadeIn 0.6s ease-out 0.2s both;
}

.policy-content {
    line-height: 1.8;
}

.policy-subsection {
    margin-bottom: 3rem;
    animation: fadeInUp 0.6s ease-out backwards;
}

.policy-subsection:nth-child(1) { animation-delay: 0s; }
.policy-subsection:nth-child(2) { animation-delay: 0.1s; }
.policy-subsection:nth-child(3) { animation-delay: 0.2s; }

.policy-subsection h2 {
    color: var(--color-primary);
    font-size: 1.5rem;
    margin-bottom: 1rem;
    border-bottom: 2px solid var(--color-secondary);
    padding-bottom: 0.5rem;
}

.policy-subsection h3 {
    color: var(--color-secondary);
    font-size: 1.1rem;
    margin-top: 1rem;
    margin-bottom: 0.5rem;
}

.policy-list {
    list-style: none;
    margin-left: 0;
}

.policy-list li {
    padding: 0.5rem 0 0.5rem 1.5rem;
    position: relative;
    color: #555;
}

.policy-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-secondary);
    font-weight: bold;
}

.ad-network-list {
    margin: 1.5rem 0;
}

.ad-network-item {
    background: var(--color-light);
    padding: 1.5rem;
    margin-bottom: 1rem;
    border-radius: 8px;
    border-left: 4px solid var(--color-secondary);
    animation: slideInLeft 0.4s ease-out backwards;
}

.ad-network-item h4 {
    color: var(--color-primary);
    margin-bottom: 0.5rem;
}

.ad-network-item p {
    margin: 0.3rem 0;
    font-size: 0.95rem;
    color: #666;
}

.policy-navigation {
    display: flex;
    gap: 1rem;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 2px solid var(--color-border);
    animation: slideInUp 0.6s ease-out 0.8s both;
}

/* ========================================
   脚部 Footer
   ======================================== */

.footer {
    background: linear-gradient(135deg, var(--color-dark), #1a1a1a);
    color: var(--color-white);
    padding: 4rem 2rem 2rem;
    margin-top: 4rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h4 {
    margin-bottom: 1rem;
    color: var(--color-primary);
}

.footer-section p {
    color: #ccc;
    margin-bottom: 0.5rem;
    line-height: 1.6;
}

.footer-section a {
    color: var(--color-secondary);
    text-decoration: none;
    transition: var(--transition-smooth);
}

.footer-section a:hover {
    color: var(--color-primary);
    text-decoration: underline;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.social-icon {
    display: inline-flex;
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: var(--color-white);
    transition: var(--transition-bounce);
}

.social-icon:hover {
    background: var(--color-primary);
    transform: scale(1.2) rotate(360deg);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #999;
}

/* ========================================
   响应式设计 Responsive Design
   ======================================== */

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

    .hamburger {
        display: flex;
    }

    .hero {
        grid-template-columns: 1fr;
        padding: 4rem 2rem;
        min-height: auto;
    }

    .hero-animation {
        display: none;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1.2rem;
    }

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

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

    .features-grid,
    .service-cards,
    .packages-grid,
    .faq-grid,
    .games-showcase {
        grid-template-columns: 1fr;
    }

    .policy-navigation {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.5rem;
    }

    .features h2 {
        font-size: 1.8rem;
    }

    .container {
        padding: 0 1rem;
    }

    .service-section h2 {
        font-size: 1.3rem;
    }
}