/* ====== 公共CSS部分 ====== */
:root {
    --primary-color: #0066cc; /* 国际商务蓝 */
    --secondary-color: #00a0e9; /* 活力蓝 */
    --accent-color: #ff6b35; /* 活力橙 */
    --light-color: #ffffff;
    --light-bg: #f8fafc;
    --dark-color: #2d3748;
    --gray-color: #718096;
    --transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    --box-shadow: 0 10px 30px rgba(0, 102, 204, 0.1);
    --border-radius: 16px;
    --gradient-primary: linear-gradient(135deg, #0066cc 0%, #00a0e9 100%);
    --gradient-secondary: linear-gradient(135deg, #00a0e9 0%, #00c9ff 100%);
    --gradient-accent: linear-gradient(135deg, #ff6b35 0%, #ff8e53 100%);
    --gradient-logo: linear-gradient(135deg, #0066cc 0%, #00a0e9 50%, #00c9ff 100%);
    --gradient-lang: linear-gradient(135deg, #ffffff 0%, #e6f0ff 50%, #cce0ff 100%);
}

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: 'Inter', 'Helvetica Neue', 'Arial', sans-serif;
    line-height: 1.7;
    color: #444;
    background-color: var(--light-bg);
    overflow-x: hidden;
}

h1, h2, h3, h4, h5 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.2rem;
    color: var(--dark-color);
}

h1 {
    font-size: 3.8rem;
    letter-spacing: -0.5px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

h2 {
    font-size: 3rem;
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
}

h2:after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 120px;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

h3 {
    font-size: 2rem;
}

p {
    margin-bottom: 1.5rem;
    font-size: 1.15rem;
    color: var(--gray-color);
}

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

.container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 25px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    color: white;
    padding: 18px 40px;
    border-radius: 50px;
    font-weight: 700;
    letter-spacing: 0.5px;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    font-size: 1.05rem;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 0%;
    height: 100%;
    background: rgba(255, 255, 255, 0.2);
    transition: all 0.5s ease;
    z-index: -1;
}

.btn:hover:before {
    width: 100%;
}

.btn:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 102, 204, 0.3);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
}

.btn-outline:hover {
    background: var(--gradient-primary);
    color: white;
}

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

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

/* ====== 顶部语言栏 ====== */
.language-bar {
    background: var(--gradient-lang);
    padding: 8px 0;
    border-bottom: 1px solid rgba(0, 102, 204, 0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 10001;
    transition: transform 0.3s ease;
}

.language-bar.hidden {
    transform: translateY(-100%);
}

.language-bar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.language-label {
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 8px;
}

.language-label i {
    color: var(--secondary-color);
    font-size: 1rem;
}

.language-label span {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    font-weight: 800;
}

.lang-switcher {
    display: flex;
    gap: 15px;
}

.lang-switcher a {
    font-weight: 600;
    font-size: 0.85rem;
    position: relative;
    padding: 4px 8px;
    border-radius: 4px;
    transition: var(--transition);
    background: rgba(255, 255, 255, 0.7);
    border: 1px solid rgba(0, 102, 204, 0.15);
    color: var(--dark-color);
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.lang-switcher a:before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 4px;
    padding: 1px;
    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 0.3s ease;
}

.lang-switcher a:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 102, 204, 0.1);
    color: var(--primary-color);
    border-color: rgba(0, 102, 204, 0.3);
}

.lang-switcher a:hover:before {
    opacity: 1;
}

.lang-switcher a.active {
    background: var(--gradient-primary);
    color: white;
    border-color: var(--primary-color);
    box-shadow: 0 5px 15px rgba(0, 102, 204, 0.2);
}

.lang-switcher a.active:before {
    opacity: 0;
}

.lang-switcher a i {
    font-size: 0.8rem;
    opacity: 0.8;
}

/* ====== 导航栏样式 ====== */
.header {
    position: fixed;
    top: 37px;
    left: 0;
    width: 100%;
    z-index: 10000;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 102, 204, 0.1);
    transition: var(--transition);
}

.header.scrolled {
    background-color: rgba(255, 255, 255, 0.98);
    box-shadow: 0 10px 40px rgba(0, 102, 204, 0.1);
}

.header.top-zero {
    top: 0 !important;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

/* LOGO样式 - 移除图标，增加渐变循环效果 */
.logo {
    display: flex;
    align-items: center;
    font-size: 2.2rem;
    font-weight: 800;
    position: relative;
}

.logo-text {
    background: var(--gradient-logo);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    position: relative;
    background-size: 200% 200%;
    animation: gradient-shift 4s ease-in-out infinite;
    padding: 5px 0;
}

@keyframes gradient-shift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.logo:after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform 0.5s ease;
}

.logo:hover:after {
    transform: scaleX(1);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-links a {
    font-weight: 600;
    color: var(--dark-color);
    position: relative;
    padding: 5px 0;
}

.nav-links a:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 3px;
    background: var(--gradient-primary);
    border-radius: 2px;
    transition: var(--transition);
}

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

.whatsapp-link {
    display: flex;
    align-items: center;
    color: #25D366;
    font-weight: 700;
    font-size: 1.1rem;
    background: rgba(37, 211, 102, 0.1);
    padding: 10px 22px;
    border-radius: 50px;
    border: 1px solid rgba(37, 211, 102, 0.2);
    transition: var(--transition);
}

.whatsapp-link:hover {
    transform: translateY(-3px);
    background: rgba(37, 211, 102, 0.2);
    box-shadow: 0 10px 25px rgba(37, 211, 102, 0.1);
}

.whatsapp-link i {
    color: #25D366;
    margin-right: 10px;
    font-size: 1.3rem;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.8rem;
    color: var(--primary-color);
    cursor: pointer;
    z-index: 10001;
}

/* ====== 底部样式 ====== */
.footer {
    background: linear-gradient(135deg, #1a2b4d 0%, #0d1a33 100%);
    color: #d1d9e8;
    padding: 100px 0 40px;
    position: relative;
    overflow: hidden;
    border-top: 1px solid rgba(0, 102, 204, 0.3);
}

.footer:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: var(--gradient-secondary);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 50px;
    margin-bottom: 60px;
}

.footer-logo {
    font-size: 2rem;
    font-weight: 800;
    color: white;
    margin-bottom: 25px;
    display: block;
}

.footer-logo span {
    background: var(--gradient-logo);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    background-size: 200% auto;
    animation: gradient-shift 5s ease-in-out infinite;
}

.footer h4 {
    color: white;
    margin-bottom: 30px;
    font-size: 1.4rem;
    position: relative;
    padding-bottom: 15px;
}

.footer h4:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 3px;
    background: var(--gradient-secondary);
    border-radius: 2px;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 15px;
}

.footer-links a {
    color: #b0b8d0;
    display: inline-block;
    position: relative;
    padding-left: 0;
}

.footer-links a:before {
    content: '›';
    position: absolute;
    left: 0;
    opacity: 0;
    transition: var(--transition);
}

.footer-links a:hover {
    color: white;
    padding-left: 20px;
}

.footer-links a:hover:before {
    opacity: 1;
    left: 0;
}

.contact-info li {
    margin-bottom: 20px;
    display: flex;
    align-items: flex-start;
}

.contact-info i {
    color: var(--secondary-color);
    margin-right: 15px;
    margin-top: 5px;
    font-size: 1.2rem;
}

.contact-info div {
    color: #b0b8d0;
}

.social-links {
    display: flex;
    gap: 15px;
    margin-top: 25px;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 45px;
    height: 45px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 50%;
    color: #b0b8d0;
    transition: var(--transition);
    font-size: 1.2rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.social-links a:hover {
    background: var(--gradient-primary);
    color: white;
    transform: translateY(-5px);
    border-color: var(--primary-color);
}

.whatsapp-footer {
    margin-top: 20px;
}

.whatsapp-footer a {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: #25D366;
    font-weight: 600;
    background: rgba(37, 211, 102, 0.1);
    padding: 12px 20px;
    border-radius: 50px;
    border: 1px solid rgba(37, 211, 102, 0.2);
    transition: var(--transition);
}

.whatsapp-footer a:hover {
    background: rgba(37, 211, 102, 0.2);
    transform: translateY(-3px);
}

.wechat-footer {
    text-align: center;
    margin-top: 20px;
}

.wechat-footer img {
    max-width: 180px;
    border-radius: var(--border-radius);
    border: 1px solid rgba(255, 255, 255, 0.2);
    background: white;
    padding: 10px;
    margin-bottom: 15px;
}

.wechat-footer p {
    color: #b0b8d0;
    font-size: 0.95rem;
    margin-top: 10px;
}

.copyright {
    text-align: center;
    padding-top: 40px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    font-size: 0.95rem;
    color: #8a95b5;
}

/* ====== 背景动画元素 ====== */
.floating-shapes {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    overflow: hidden;
}

.floating-shape {
    position: absolute;
    border-radius: 50%;
    background: var(--gradient-secondary);
    opacity: 0.05;
    z-index: 1;
}

.shape-1 {
    width: 400px;
    height: 400px;
    top: 10%;
    right: -200px;
    animation: float-1 25s infinite ease-in-out;
}

.shape-2 {
    width: 300px;
    height: 300px;
    bottom: 10%;
    left: -150px;
    animation: float-2 30s infinite ease-in-out;
}

.shape-3 {
    width: 200px;
    height: 200px;
    top: 50%;
    right: 10%;
    animation: float-3 20s infinite ease-in-out;
}

@keyframes float-1 {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    33% { transform: translate(30px, 50px) rotate(120deg); }
    66% { transform: translate(-20px, 30px) rotate(240deg); }
}

@keyframes float-2 {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    33% { transform: translate(-40px, 30px) rotate(120deg); }
    66% { transform: translate(20px, -20px) rotate(240deg); }
}

@keyframes float-3 {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    33% { transform: translate(20px, -30px) rotate(120deg); }
    66% { transform: translate(-30px, 20px) rotate(240deg); }
}

/* ====== 动画效果 ====== */
@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
}

@keyframes pulse-glow {
    0%, 100% {
        box-shadow: 0 0 20px rgba(0, 160, 233, 0.5);
    }
    50% {
        box-shadow: 0 0 40px rgba(0, 160, 233, 0.8);
    }
}

.float-animation {
    animation: float 5s ease-in-out infinite;
}

.pulse-glow-animation {
    animation: pulse-glow 2s ease-in-out infinite;
}

.animate-on-scroll {
    opacity: 0;
    transform: translateY(50px);
    transition: opacity 1s cubic-bezier(0.19, 1, 0.22, 1), transform 1s cubic-bezier(0.19, 1, 0.22, 1);
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

.animate-on-scroll-left {
    opacity: 0;
    transform: translateX(-50px);
    transition: opacity 1s cubic-bezier(0.19, 1, 0.22, 1), transform 1s cubic-bezier(0.19, 1, 0.22, 1);
}

.animate-on-scroll-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.animate-on-scroll-right {
    opacity: 0;
    transform: translateX(50px);
    transition: opacity 1s cubic-bezier(0.19, 1, 0.22, 1), transform 1s cubic-bezier(0.19, 1, 0.22, 1);
}

.animate-on-scroll-right.visible {
    opacity: 1;
    transform: translateX(0);
}

/* ====== 响应式调整（公共部分） ====== */
@media (max-width: 1200px) {
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
        gap: 40px;
    }
    
    h1 {
        font-size: 3.2rem;
    }
    
    h2 {
        font-size: 2.6rem;
    }
}

@media (max-width: 992px) {
    .mobile-menu-btn {
        display: block;
    }
    
    .nav-links {
        position: fixed;
        top: 0;
        left: -100%;
        width: 80%;
        height: 100vh;
        background: white;
        backdrop-filter: blur(10px);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        padding: 80px 0;
        box-shadow: 0 0 50px rgba(0, 0, 0, 0.1);
        transition: var(--transition);
        z-index: 10000;
        border-right: 1px solid rgba(0, 102, 204, 0.1);
    }
    
    .nav-links.active {
        left: 0;
    }
    
    .nav-links li {
        width: 100%;
        text-align: center;
    }
    
    .nav-links a {
        display: block;
        padding: 15px 0;
        font-size: 1.2rem;
    }
    
    .whatsapp-link {
        font-size: 1rem;
        padding: 8px 18px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 50px;
    }
    
    h1 {
        font-size: 2.8rem;
    }
    
    h2 {
        font-size: 2.2rem;
    }
    
    section {
        padding: 80px 0;
    }
    
    .language-bar {
        padding: 6px 0;
    }
    
    .language-bar .container {
        flex-direction: column;
        gap: 8px;
        align-items: flex-start;
    }
    
    .lang-switcher {
        flex-wrap: wrap;
        gap: 8px;
    }
    
    .lang-switcher a {
        font-size: 0.8rem;
        padding: 3px 6px;
    }
    
    .header {
        top: 60px;
    }
}

@media (max-width: 768px) {
    h1 {
        font-size: 2.4rem;
    }
    
    h2 {
        font-size: 2rem;
    }
    
    h3 {
        font-size: 1.6rem;
    }
    
    .btn {
        padding: 16px 32px;
    }
}