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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
    scroll-behavior: smooth;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 顶部导航 */
.header {
    background: linear-gradient(rgba(255, 255, 255, 0.95), rgba(255, 255, 255, 0.95)), url('./imgs/header-bg.jpg');
    background-size: cover;
    background-position: center;
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.logo {
    display: flex;
    align-items: center;
    position: relative;
    padding: 5px 10px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.1);
    overflow: hidden;
}

.logo::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent 0%,
        rgba(255, 255, 255, 0.6) 50%,
        transparent 100%
    );
    z-index: 0;
    animation: shine 2s infinite;
    pointer-events: none;
}

.logo img {
    height: 45px;
    transition: transform 0.3s;
    position: relative;
    z-index: 2;
}

@keyframes shine {
    0% {
        transform: translateX(-100%);
    }
    100% {
        transform: translateX(200%);
    }
}

.logo-text {
    margin-left: 15px;
    font-size: 1.5rem;
    font-weight: 700;
    color: #1677ff;
    transition: color 0.3s;
    position: relative;
    z-index: 2;
}

.logo:hover .logo-text {
    color: #1677ff;
}

.logo img:hover {
    transform: scale(1.05);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 10px;
}

.nav-links li {
    margin-left: 0;
}

.nav-links a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: all 0.2s;
    padding: 10px 20px;
    border-radius: 4px;
    background: #f5f5f5;
    border: 1px solid #e0e0e0;
}

.nav-links a:hover {
    color: #fff;
    background: #1677ff;
    border-color: #1677ff;
}

.nav-links a::after {
    display: none;
}

.auth-buttons {
    display: flex;
    gap: 15px;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 20px;
    cursor: pointer;
    z-index: 1001;
}

.mobile-menu-btn span {
    display: block;
    width: 100%;
    height: 3px;
    background: #333;
    border-radius: 2px;
    transition: all 0.3s;
}

.mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #f5f7fa 0%, #e4e7eb 100%);
    z-index: 999;
    padding-top: 80px;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
    box-shadow: -2px 0 10px rgba(0,0,0,0.1);
}

.mobile-menu.active {
    opacity: 1;
    visibility: visible;
}

.mobile-menu ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.mobile-menu li {
    margin-bottom: 0;
}

.mobile-menu a {
    display: block;
    padding: 16px 20px;
    text-decoration: none;
    color: #333;
    font-size: 1.1rem;
    font-weight: 500;
    transition: all 0.3s;
    border-bottom: 1px solid rgba(0,0,0,0.05);
    position: relative;
    overflow: hidden;
}

.mobile-menu a::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 4px;
    height: 100%;
    background: #1677ff;
    transform: scaleY(0);
    transform-origin: bottom;
    transition: transform 0.3s;
}

.mobile-menu a:hover {
    color: #1677ff;
    background: rgba(22, 119, 255, 0.05);
    padding-left: 24px;
}

.mobile-menu a:hover::before {
    transform: scaleY(1);
}

.mobile-menu .mobile-auth {
    padding: 20px;
    margin-top: 20px;
    border-top: 1px solid rgba(0,0,0,0.05);
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.mobile-menu .mobile-auth .btn {
    flex: 1;
    margin: 0 5px;
    padding: 12px;
    font-size: 1rem;
    font-weight: 500;
    border-radius: 8px;
    transition: all 0.3s;
    width: 100%;
    text-align: center;
}

.mobile-menu .mobile-auth .btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(22, 119, 255, 0.2);
}

.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 30px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, #1677ff 0%, #0962c7 100%);
    color: #fff;
    box-shadow: 0 4px 15px rgba(67, 184, 254, 0.3);
}

.btn-primary:hover {
    background: linear-gradient(135deg, #33a8ee 0%, #0073d6 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(67, 184, 254, 0.4);
}

.btn-secondary {
    background: #f8f9fa;
    color: #333;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.btn-secondary:hover {
    background: #e9ecef;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

/* 英雄区 */
.hero {
    background: linear-gradient(rgba(67, 184, 254, 0.5), rgba(0, 134, 230, 0.5)), url('./imgs/hero-bg.jpg');
    background-size: cover;
    background-position: center;
    color: #fff;
    padding: 150px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0% { transform: translate(0, 0) rotate(0deg); }
    50% { transform: translate(10px, 10px) rotate(1deg); }
    100% { transform: translate(0, 0) rotate(0deg); }
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero h1 {
    font-size: 4rem;
    margin-bottom: 25px;
    font-weight: 700;
    text-shadow: 0 2px 10px rgba(0,0,0,0.2);
    animation: fadeInUp 1s ease-out;
}

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

.hero p {
    font-size: 1.3rem;
    margin-bottom: 50px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    opacity: 0.95;
    animation: fadeInUp 1s ease-out 0.2s both;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 25px;
    flex-wrap: wrap;
    animation: fadeInUp 1s ease-out 0.4s both;
}

.hero-buttons .btn {
    font-size: 1.1rem;
    padding: 12px 25px;
    animation: fadeInUp 1s ease-out 0.4s both;
    position: relative;
    overflow: hidden;
}

.hero-buttons .btn:hover {
    transform: translateY(-3px) scale(1.05);
}

.hero-buttons .btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 5px;
    height: 5px;
    background: rgba(255, 255, 255, 0.5);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    opacity: 0;
    transition: all 0.6s;
}

.hero-buttons .btn:hover::before {
    width: 300px;
    height: 300px;
    opacity: 0;
}

/* 英雄区统计数据 */
.hero-stats {
    display: flex;
    justify-content: center;
    gap: 50px;
    margin: 40px 0;
    flex-wrap: wrap;
}

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

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: #fff;
    text-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.stat-label {
    display: block;
    font-size: 1.1rem;
    color: rgba(255,255,255,0.9);
}

/* 产品展示 */
.features {
    padding: 100px 0;
    background: #f9f9f9;
    position: relative;
}

.features::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100px;
    background: linear-gradient(180deg, #1677ff 0%, transparent 100%);
    opacity: 0.1;
}

.section-title {
    text-align: center;
    font-size: 2.8rem;
    margin-bottom: 70px;
    color: #333;
    font-weight: 700;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, #1677ff 0%, #0962c7 100%);
    border-radius: 2px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 35px;
}

.feature-card {
    background: #fff;
    padding: 40px 30px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 5px;
    height: 100%;
    background: linear-gradient(180deg, #1677ff 0%, #0962c7 100%);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.12);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #1677ff 0%, #0962c7 100%);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 25px;
    font-size: 24px;
    color: #fff;
    box-shadow: 0 4px 15px rgba(67, 184, 254, 0.3);
}

.feature-card h3 {
    font-size: 1.6rem;
    margin-bottom: 20px;
    color: #333;
    font-weight: 600;
}

.feature-card p {
    color: #666;
    line-height: 1.7;
}

/* 行业案例 */
.cases {
    padding: 100px 0;
    background: #fff;
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 50px;
}

.case-card {
    background: #fff;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    text-align: center;
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}

.case-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(90deg, #1677ff 0%, #0962c7 100%);
}

.case-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.12);
}

.case-card {
    text-align: left;
}

.case-image {
    margin-bottom: 20px;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.case-image img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: transform 0.3s;
}

.case-card:hover .case-image img {
    transform: scale(1.05);
}

.case-card h3 {
    font-size: 1.4rem;
    margin-bottom: 10px;
    color: #333;
    font-weight: 600;
}

.case-location {
    color: #1677ff;
    font-weight: 500;
    margin-bottom: 15px;
    font-size: 0.9rem;
}

.case-description {
    color: #666;
    line-height: 1.6;
    margin-bottom: 20px;
}

.case-info h4 {
    font-size: 1.1rem;
    margin: 15px 0 10px 0;
    color: #333;
}

.case-features,
.case-data {
    list-style: none;
    padding: 0;
    margin: 0 0 15px 0;
}

.case-features li,
.case-data li {
    color: #666;
    line-height: 1.5;
    position: relative;
    padding-left: 20px;
    margin-bottom: 5px;
}

.case-features li::before,
.case-data li::before {
    content: '•';
    color: #1677ff;
    font-weight: bold;
    position: absolute;
    left: 0;
}

.case-solution {
    color: #666;
    line-height: 1.6;
    margin-bottom: 15px;
}

.case-btn {
    text-align: center;
    margin-top: 40px;
}

.case-btn .btn {
    font-size: 1.1rem;
    padding: 12px 30px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .case-image img {
        height: 180px;
    }
    
    .case-card {
        padding: 25px;
    }
}

/* 下载中心 */
.download {
    padding: 100px 0;
    background: #f9f9f9;
    position: relative;
}

.download::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100px;
    background: linear-gradient(180deg, #fff 0%, transparent 100%);
}

.download-grid {
    display: flex;
    flex-wrap: wrap;
    margin: -17.5px;
}

.download-card {
    flex: 1;
    min-width: 320px;
    max-width: 380px;
    margin: 17.5px;
    background: #fff;
    padding: 35px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}

.download-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(90deg, #1677ff 0%, #0962c7 100%);
}

.download-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.12);
}

.download-card h3 {
    font-size: 1.6rem;
    margin-bottom: 25px;
    color: #333;
    font-weight: 600;
    display: flex;
    align-items: center;
    margin-right: 10px;
}

.download-card h3::before {
    content: '📥';
    font-size: 1.8rem;
    margin-right: 10px;
}

.download-links {
    display: flex;
    flex-direction: column;
}

.download-link {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    margin-bottom: 15px;
    background: #f8f9fa;
    border-radius: 8px;
    text-decoration: none;
    color: #333;
    transition: all 0.3s;
    border: 1px solid #e9ecef;
}

.download-link:hover {
    background: #e9ecef;
    transform: translateX(5px);
    border-color: #1677ff;
}

.download-link span:first-child {
    font-weight: 500;
}

.download-link span:last-child {
    background: #1677ff;
    color: #fff;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.9rem;
}

.download-link:hover span:last-child {
    background: #0962c7;
}

/* 合作伙伴 */
.partners {
    padding: 80px 0;
    background: #fff;
    position: relative;
}

.partners::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100px;
    background: linear-gradient(180deg, #f9f9f9 0%, transparent 100%);
}

.partners-grid {
    display: flex;
    justify-content: space-around;
    align-items: center;
    flex-wrap: wrap;
    margin: -30px;
    padding: 40px 0;
}

.partner-logo {
    margin: 30px;
}

.partner-logo {
    height: 70px;
    opacity: 0.6;
    transition: all 0.3s;
    filter: grayscale(50%);
}

.partner-logo:hover {
    opacity: 1;
    filter: grayscale(0%);
    transform: scale(1.05);
    box-shadow: 0 6px 20px rgba(0,0,0,0.15);
}

/* 客服中心 */
.contact {
    padding: 100px 0;
    background: #fff;
    position: relative;
}



.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: start;
}

.contact-info {
    background: #fff;
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    position: relative;
    overflow: hidden;
}

.contact-info::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(90deg, #1677ff 0%, #0962c7 100%);
}

.contact-info h3 {
    font-size: 1.6rem;
    margin-bottom: 25px;
    color: #333;
    font-weight: 600;
}

.contact-info p {
    color: #666;
    margin-bottom: 15px;
    font-size: 1.1rem;
}

.wechat-qr {
    margin-top: 30px;
}

.wechat-qr h4 {
    font-size: 1.1rem;
    margin-bottom: 15px;
    color: #333;
}

.wechat-qr img {
    max-width: 150px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.contact-form {
    background: #fff;
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    position: relative;
    overflow: hidden;
}

.contact-form::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(90deg, #1677ff 0%, #0962c7 100%);
}

.contact-form h3 {
    font-size: 1.6rem;
    margin-bottom: 25px;
    color: #333;
    font-weight: 600;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #333;
    font-weight: 500;
    font-size: 0.95rem;
    transition: all 0.3s;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    border: 1px solid #e9ecef;
    border-radius: 8px;
    font-size: 1rem;
    color: #333;
    background: #fff;
    transition: all 0.3s;
    box-sizing: border-box;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #1677ff;
    box-shadow: 0 0 0 3px rgba(67, 184, 254, 0.1);
    transform: translateY(-2px);
}

.form-group input:focus + label,
.form-group textarea:focus + label {
    color: #1677ff;
    font-weight: 600;
}

.form-group textarea {
    resize: vertical;
    min-height: 140px;
    line-height: 1.5;
}

.contact-form .btn {
    width: 100%;
    padding: 14px;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 8px;
    transition: all 0.3s;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.contact-form .btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(22, 119, 255, 0.3);
}

.contact-form .btn:active {
    transform: translateY(0);
}

.contact-form .btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 5px;
    height: 5px;
    background: rgba(255, 255, 255, 0.5);
    opacity: 0;
    border-radius: 100%;
    transform: scale(1, 1) translate(-50%, -50%);
    transform-origin: 50% 50%;
}

.contact-form .btn:focus:not(:active)::before {
    animation: ripple 1s ease-out;
}

@keyframes ripple {
    0% {
        transform: scale(0, 0);
        opacity: 0.5;
    }
    100% {
        transform: scale(20, 20);
        opacity: 0;
    }
}

/* 表单验证样式 */
.form-group input:invalid,
.form-group textarea:invalid {
    border-color: #ff4d4f;
}

.form-group input:valid,
.form-group textarea:valid {
    border-color: #52c41a;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .contact-info,
    .contact-form {
        padding: 30px;
    }
    
    .contact {
        padding: 80px 0;
    }
    
    .form-group input,
    .form-group textarea {
        padding: 12px 15px;
    }
    
    .form-group textarea {
        min-height: 120px;
    }
}

/* 品牌合作 */
.brand-partners {
    padding: 100px 0;
    background: #f9f9f9;
    position: relative;
}

.brand-partners::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100px;
    background: linear-gradient(180deg, #fff 0%, transparent 100%);
}

.brand-grid {
    display: flex;
    flex-wrap: wrap;
    margin: -15px;
}

.brand-item {
    flex: 1;
    min-width: 150px;
    max-width: 180px;
    margin: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #fff;
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
    transition: all 0.3s;
}

.brand-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.12);
}

.brand-item img {
    max-width: 100%;
    max-height: 80px;
    transition: transform 0.3s;
}

.brand-item:hover img {
    transform: scale(1.05);
}

/* 联系我们 */
.contact {
    padding: 100px 0;
    background: #333;
    color: #fff;
    position: relative;
}



.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 50px;
}

.contact-info h3 {
    font-size: 1.8rem;
    margin-bottom: 30px;
    color: #1677ff;
    font-weight: 600;
}

.contact-info p {
    margin-bottom: 15px;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.contact-info p::before {
    content: '';
    display: inline-block;
    width: 20px;
    height: 20px;
    background: #1677ff;
    border-radius: 50%;
    text-align: center;
    line-height: 20px;
    font-size: 12px;
}

.contact-info p:nth-child(2)::before {
    content: '📞';
}

.contact-info p:nth-child(3)::before {
    content: '📱';
}

.contact-info p:nth-child(4)::before {
    content: '📧';
}

.contact-info .wechat-qr {
    margin-top: 30px;
}

.contact-info .wechat-qr h4 {
    font-size: 1.2rem;
    margin-bottom: 15px;
    color: #1677ff;
}

.contact-info .wechat-qr img {
    width: 160px;
    border: 3px solid #1677ff;
    border-radius: 10px;
    transition: transform 0.3s;
}

.contact-info .wechat-qr img:hover {
    transform: scale(1.05);
}

.contact-form {
    background: rgba(255,255,255,0.05);
    padding: 40px;
    border-radius: 12px;
    border: 1px solid rgba(255,255,255,0.1);
    transition: all 0.3s;
}

.contact-form:hover {
    border-color: #1677ff;
    box-shadow: 0 0 30px rgba(67, 184, 254, 0.1);
}

.contact-form h3 {
    font-size: 1.8rem;
    margin-bottom: 30px;
    color: #1677ff;
    font-weight: 600;
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 8px;
    background: rgba(255,255,255,0.05);
    color: #fff;
    font-size: 1rem;
    transition: all 0.3s;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #1677ff;
    background: rgba(255,255,255,0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.contact-form .btn {
    width: 100%;
    font-size: 1.1rem;
    padding: 12px;
    margin-top: 10px;
}



/* 返回顶部按钮 */
.top-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 55px;
    height: 55px;
    background: linear-gradient(135deg, #1677ff 0%, #0962c7 100%);
    color: #fff;
    border: none;
    border-radius: 50%;
    box-shadow: 0 4px 15px rgba(67, 184, 254, 0.4);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    z-index: 999;
    transition: all 0.3s;
    opacity: 0;
    pointer-events: none;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        box-shadow: 0 4px 15px rgba(67, 184, 254, 0.4);
    }
    50% {
        box-shadow: 0 6px 25px rgba(67, 184, 254, 0.6);
    }
    100% {
        box-shadow: 0 4px 15px rgba(67, 184, 254, 0.4);
    }
}

.top-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(67, 184, 254, 0.5);
}

.top-btn.visible {
    opacity: 1;
    pointer-events: auto;
}

/* 页脚 */
.footer {
    background: #333;
    color: #fff;
    padding: 80px 0 40px;
    margin-top: 100px;
    border-top: 5px solid #1677ff;
    position: relative;
    z-index: 10;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, rgba(51,51,51,0.95) 0%, rgba(30,30,30,0.95) 100%);
    z-index: -1;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 50px;
    margin-bottom: 50px;
}

.footer-column h3 {
    font-size: 1.6rem;
    margin-bottom: 25px;
    color: #1677ff;
    font-weight: 600;
}

.footer-column h4 {
    font-size: 1.3rem;
    margin-bottom: 20px;
    color: #fff;
    font-weight: 500;
}

.footer-column p {
    color: #ccc;
    line-height: 1.6;
    margin-bottom: 25px;
    font-size: 1rem;
}

.footer-social {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

.social-link {
    color: #fff;
    text-decoration: none;
    padding: 10px 18px;
    background: rgba(255,255,255,0.1);
    border-radius: 8px;
    transition: all 0.3s;
    font-weight: 500;
}

.social-link:hover {
    background: #1677ff;
    transform: translateY(-3px);
    box-shadow: 0 4px 12px rgba(67, 184, 254, 0.4);
}

.footer-links {
    list-style: none;
    padding: 0;
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: #ccc;
    text-decoration: none;
    transition: all 0.3s;
    display: inline-block;
    position: relative;
}

.footer-links a:hover {
    color: #1677ff;
    transform: translateX(5px);
}

.footer-links a::before {
    content: '→';
    position: absolute;
    left: -15px;
    opacity: 0;
    transition: all 0.3s;
}

.footer-links a:hover::before {
    opacity: 1;
    left: -10px;
}

.footer-contact {
    list-style: none;
    padding: 0;
}

.footer-contact li {
    margin-bottom: 12px;
    color: #ccc;
    font-size: 1rem;
    display: flex;
    align-items: center;
}

.footer-contact li::before {
    content: '•';
    color: #1677ff;
    margin-right: 10px;
    font-size: 1.2rem;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.footer-bottom p {
    color: #ccc;
    margin: 0;
    font-size: 0.9rem;
}

.footer-policy {
    display: flex;
    gap: 25px;
}

.footer-policy a {
    color: #ccc;
    text-decoration: none;
    transition: color 0.3s;
    font-size: 0.9rem;
}

.footer-policy a:hover {
    color: #1677ff;
}

/* 移动端底部导航栏 */
.mobile-bottom-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    width: 100%;
    background: #fff;
    box-shadow: 0 -2px 10px rgba(0,0,0,0.1);
    z-index: 999;
    border-top: 1px solid #eee;
    border-radius: 16px 16px 0 0;
}

.mobile-bottom-nav .nav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 6px 0;
    text-decoration: none;
    color: #666;
    transition: all 0.3s;
}

.mobile-bottom-nav .nav-item.active {
    color: #1677ff;
}

.mobile-bottom-nav .nav-item:hover {
    color: #1677ff;
}

.mobile-bottom-nav .nav-item.register-btn {
    color: #1677ff;
    font-weight: 600;
}

.mobile-bottom-nav .nav-item.register-btn:hover {
    color: #0952d0;
}

.mobile-bottom-nav .nav-item.register-btn .nav-text {
    font-weight: 600;
}

.mobile-bottom-nav .nav-icon {
    font-size: 1.2rem;
    margin-bottom: 4px;
}

.mobile-bottom-nav .nav-text {
    font-size: 0.7rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    html {
        overflow-x: hidden;
    }
    
    .container {
        padding: 0 15px;
    }
    
    .mobile-bottom-nav {
        display: flex;
    }
    
    body {
        padding-bottom: 48px;
        padding-top: 60px;
    }
    .footer {
        padding: 30px 0 25px;
        margin-top: 50px;
    }
    
    .footer-grid {
        display: flex;
        flex-wrap: wrap;
        gap: 15px;
        margin-bottom: 15px;
    }
    
    .footer-column {
        flex: 1 1 calc(50% - 7.5px);
        min-width: 140px;
    }
    
    .footer-column h3 {
        font-size: 1.1rem;
        margin-bottom: 8px;
        color: #1677ff;
    }
    
    .footer-column h4 {
        font-size: 0.95rem;
        margin-bottom: 6px;
        color: #fff;
    }
    
    .footer-column p {
        font-size: 0.75rem;
        margin-bottom: 8px;
        line-height: 1.4;
        color: #ccc;
    }
    
    .footer-links li {
        margin-bottom: 5px;
    }
    
    .footer-links a {
        font-size: 0.75rem;
        color: #ccc;
    }
    
    .footer-links a:hover {
        color: #1677ff;
    }
    
    .footer-contact li {
        font-size: 0.75rem;
        margin-bottom: 5px;
        color: #ccc;
    }
    
    .footer-social {
        gap: 6px;
        flex-wrap: wrap;
    }
    
    .social-link {
        padding: 5px 10px;
        font-size: 0.7rem;
        background: rgba(255,255,255,0.1);
        color: #ccc;
        border-radius: 6px;
    }
    
    .social-link:hover {
        background: #1677ff;
        color: #fff;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
        padding-top: 20px;
        border-top: 1px solid rgba(255,255,255,0.1);
    }
    
    .footer-bottom p {
        font-size: 0.75rem;
        color: #999;
    }
    
    .footer-policy {
        justify-content: center;
        gap: 12px;
        flex-wrap: wrap;
    }
    
    .footer-policy a {
        font-size: 0.75rem;
        color: #999;
    }
    
    .footer-policy a:hover {
        color: #1677ff;
    }
    
    /* 隐藏返回顶部按钮 */
    #top-btn {
        display: none;
    }
}

/* 客服中心 */
.contact {
    padding: 100px 0;
    background: #f9f9f9;
    position: relative;
    margin-top: 50px;
}



.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: stretch;
}

.contact-info {
    background: #fff;
    padding: 50px 40px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.contact-info h3 {
    font-size: 1.8rem;
    margin-bottom: 30px;
    color: #333;
    font-weight: 600;
}

.contact-info p {
    color: #666;
    margin-bottom: 20px;
    font-size: 1.3rem;
    line-height: 1.6;
}

.wechat-qr {
    margin-top: 30px;
    border-top: 1px solid #e9ecef;
    padding-top: 30px;
}

.wechat-qr h4 {
    font-size: 1.2rem;
    margin-bottom: 15px;
    color: #333;
    font-weight: 500;
}

.wechat-qr img {
    max-width: 150px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.contact-form {
    background: #fff;
    padding: 50px 40px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.contact-form h3 {
    font-size: 1.6rem;
    margin-bottom: 20px;
    color: #333;
    font-weight: 600;
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #333;
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #e9ecef;
    border-radius: 8px;
    font-size: 1rem;
    color: #333;
    background: #fff;
    transition: all 0.3s;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #1677ff;
    box-shadow: 0 0 0 3px rgba(67, 184, 254, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .contact-info,
    .contact-form {
        padding: 30px;
    }
    
    .contact {
        padding: 80px 0;
    }
}

/* 主站下载按钮 */
.main-download-btn {
    width: 100%;
    margin-bottom: 40px;
}

.main-download-link {
    display: flex;
    width: 100%;
    text-align: center;
    padding: 20px;
    font-size: 1.4rem;
    font-weight: 700;
    border-radius: 12px;
    background: linear-gradient(135deg, #1677ff 0%, #0962c7 100%);
    color: #fff;
    box-shadow: 0 8px 25px rgba(67, 184, 254, 0.4);
    transition: all 0.3s ease;
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 1px;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.main-download-link .icon {
    font-size: 1.6rem;
}

.main-download-link:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 30px rgba(67, 184, 254, 0.6);
    background: linear-gradient(135deg, #33a8ee 0%, #0073d6 100%);
}

/* 官方店铺 */
.official-store {
    padding: 80px 0;
    background: linear-gradient(135deg, #f5f7fa 0%, #e4e8eb 100%);
    position: relative;
}

.official-store .section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 20px;
    color: #333;
    font-weight: 700;
}

.official-store-subtitle {
    text-align: center;
    color: #666;
    font-size: 1.1rem;
    margin-bottom: 50px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.store-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.store-card {
    background: #fff;
    border-radius: 16px;
    padding: 30px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    transition: all 0.3s;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.store-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, #1677ff 0%, #0962c7 100%);
}

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

.store-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #1677ff 0%, #0962c7 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 2.5rem;
    box-shadow: 0 4px 15px rgba(67, 184, 254, 0.3);
}

.store-card h3 {
    font-size: 1.4rem;
    margin-bottom: 15px;
    color: #333;
    font-weight: 600;
}

.store-card p {
    color: #666;
    line-height: 1.6;
    margin-bottom: 20px;
    font-size: 0.95rem;
}

.store-price {
    font-size: 1.5rem;
    color: #1677ff;
    font-weight: 700;
    margin-bottom: 15px;
}

.store-btn {
    display: inline-block;
    padding: 10px 25px;
    background: linear-gradient(135deg, #1677ff 0%, #0962c7 100%);
    color: #fff;
    text-decoration: none;
    border-radius: 25px;
    font-weight: 500;
    transition: all 0.3s;
}

.store-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(67, 184, 254, 0.4);
}

.store-more {
    text-align: center;
    margin-top: 20px;
}

.store-more-link {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 15px 40px;
    background: #333;
    color: #fff;
    text-decoration: none;
    border-radius: 30px;
    font-size: 1.1rem;
    font-weight: 600;
    transition: all 0.3s;
}

.store-more-link:hover {
    background: #1677ff;
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(67, 184, 254, 0.4);
}

@media (max-width: 768px) {
    .official-store {
        padding: 60px 0;
    }

    .official-store .section-title {
        font-size: 1.8rem;
    }

    .store-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .store-card {
        padding: 25px 20px;
    }

    .store-icon {
        width: 60px;
        height: 60px;
        font-size: 2rem;
    }
}

/* 产品展示 */
.product-showcase {
    padding: 100px 0;
    background: #fff;
    position: relative;
}

.product-showcase::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100px;
    background: linear-gradient(180deg, #f9f9f9 0%, transparent 100%);
}

.showcase-grid {
    display: flex;
    flex-wrap: wrap;
    margin: -20px;
}

.showcase-item {
    flex: 1;
    min-width: 350px;
    max-width: 400px;
    background: #fff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    transition: all 0.3s;
    margin: 20px;
}

.showcase-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.12);
}

.showcase-img {
    width: 100%;
    height: 250px;
    transition: transform 0.3s;
    display: block;
}

.showcase-item:hover .showcase-img {
    transform: scale(1.05);
}

@media screen and (-ms-high-contrast: active), (-ms-high-contrast: none) {
    .showcase-img {
        width: auto;
        max-width: 100%;
    }
}

.showcase-item h3 {
    font-size: 1.4rem;
    margin: 20px 20px 10px;
    color: #333;
    font-weight: 600;
}

.showcase-item p {
    color: #666;
    line-height: 1.6;
    margin: 0 20px 20px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 0 4px;
    }
    
    .nav {
        position: relative;
        padding: 8px 0;
    }
    
    .header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 1000;
    }
    
    .mobile-menu-btn {
        display: flex;
        width: 22px;
        height: 16px;
    }
    
    .mobile-menu-btn span {
        height: 2px;
    }
    
    .logo {
        padding: 2px 6px;
    }
    
    .logo img {
        height: 30px;
    }
    
    .logo-text {
        font-size: 1rem;
        margin-left: 8px;
    }
    
    .auth-buttons .btn {
        padding: 5px 10px;
        font-size: 0.75rem;
    }
    
    .nav-links {
        display: none;
    }
    
    .auth-buttons {
        display: flex;
        gap: 1px;
    }
    
    .mobile-menu-btn {
        margin-left: 0;
    }
    
    /* 隐藏访问手机端按钮和滚动字幕 */
    .floating-btn,
    .scroll-text {
        display: none;
    }
    
    .btn {
        padding: 7px 14px;
        font-size: 0.8rem;
    }
    
    .auth-buttons .btn {
        padding: 5px 10px;
        font-size: 0.75rem;
        border-radius: 18px;
    }
    
    .mobile-menu {
        display: block;
        padding-top: 60px;
    }
    
    .mobile-menu a {
        padding: 12px;
        font-size: 1rem;
    }
    
    .mobile-menu .mobile-auth {
        padding: 12px;
    }
    
    .mobile-menu .mobile-auth .btn {
        padding: 10px 18px;
        font-size: 0.9rem;
    }
    
    .hero {
        padding: 80px 0;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
        gap: 12px;
    }
    
    .hero-stats {
        gap: 20px;
    }
    
    .stat-number {
        font-size: 1.5rem;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .features {
        padding: 60px 0;
    }
    
    .cases {
        padding: 60px 0;
    }
    
    .download {
        padding: 60px 0;
    }
    
    .brand-partners {
        padding: 60px 0;
    }
    
    .brand-grid {
        margin: -8px;
    }
    
    .brand-item {
        min-width: 100px;
        margin: 8px;
        padding: 12px;
    }
    
    .partners {
        padding: 50px 0;
    }
    
    .partners-grid {
        margin: -15px;
    }
    
    .partner-logo {
        margin: 15px;
    }
    
    .partner-logo {
        height: 40px;
    }
    
    .contact {
        padding: 60px 0;
    }
    
    .contact-grid {
        gap: 25px;
    }
    
    .contact-form {
        padding: 25px;
    }
    
    .floating-btn {
        width: 50px;
        height: 50px;
        font-size: 18px;
    }
    
    .mobile-bottom-nav .nav-icon {
        font-size: 0.95rem;
        margin-bottom: 2px;
    }
    
    .mobile-bottom-nav .nav-text {
        font-size: 0.6rem;
    }
    
    body {
        padding-bottom: 48px;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 1.8rem;
    }
    
    .hero p {
        font-size: 0.9rem;
    }
    
    .section-title {
        font-size: 1.6rem;
    }
    
    .feature-card {
        padding: 25px 18px;
    }
    
    .case-card {
        padding: 20px;
    }
    
    .download-card {
        padding: 20px;
    }
    
    .contact-info p {
        font-size: 0.9rem;
    }
    
    .wechat-qr img {
        width: 120px;
    }
}

@media (max-width: 768px) {
    .showcase-grid {
        margin: -10px;
    }

    .showcase-item {
        min-width: 100%;
        margin: 10px;
    }

    .showcase-img {
        height: 200px;
    }

    .product-showcase {
        padding: 80px 0;
    }

    .download-grid {
        margin: -10px;
    }

    .download-card {
        min-width: 100%;
        margin: 10px;
    }

    /* 隐藏访问手机端按钮 */
}

/* 友情链接 */
.friend-links {
    padding: 80px 0;
    background: linear-gradient(135deg, #f5f7fa 0%, #e8ecf1 100%);
    text-align: center;
    position: relative;
}

.friend-links::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(90deg, #1677ff 0%, #0962c7 100%);
}

.friend-links .section-title {
    margin-bottom: 40px;
}

.friend-links-grid {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 25px;
    margin-top: 30px;
}

.friend-link {
    padding: 15px 40px;
    background: linear-gradient(135deg, #1677ff 0%, #0962c7 100%);
    border: none;
    border-radius: 30px;
    color: #fff;
    text-decoration: none;
    font-size: 1.1rem;
    font-weight: 600;
    transition: all 0.3s;
    box-shadow: 0 4px 15px rgba(67, 184, 254, 0.3);
}

.friend-link:hover {
    background: linear-gradient(135deg, #33a8ee 0%, #0073d6 100%);
    transform: translateY(-5px) scale(1.05);
    box-shadow: 0 8px 25px rgba(67, 184, 254, 0.5);
}

@media (max-width: 768px) {
    .friend-links {
        padding: 50px 0;
    }

    .friend-links-grid {
        gap: 15px;
    }

    .friend-link {
        padding: 12px 25px;
        font-size: 1rem;
    }
}

/* 悬浮二维码提示窗 */
.floating-qr-window {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 160px;
    background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    padding: 15px;
    z-index: 997;
    text-align: center;
    animation: slideIn 0.5s ease;
}

.floating-qr-window::before {
    content: '';
    position: absolute;
    top: -8px;
    right: 20px;
    width: 0;
    height: 0;
    border-left: 8px solid transparent;
    border-right: 8px solid transparent;
    border-bottom: 8px solid #f8f9fa;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.floating-qr-window .qr-title {
    font-size: 14px;
    font-weight: 600;
    color: #333;
    margin-bottom: 10px;
}

.floating-qr-window .qr-image {
    width: 120px;
    height: 120px;
    margin: 0 auto 10px;
    border-radius: 8px;
    overflow: hidden;
}

.floating-qr-window .qr-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.floating-qr-window .qr-tip {
    font-size: 12px;
    color: #666;
    line-height: 1.4;
}

@media (max-width: 768px) {
    .floating-qr-window {
        display: none;
    }
}