/* 全局样式 */
:root {
    --black: #000000;
    --light-black: #0a0a0a;
    --dark-gray: #1a1a1a;
    --accent: #808080;
    --light-accent: #a0a0a0;
    --gray: #cccccc;
    --white: #ffffff;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Poppins', sans-serif;
    line-height: 1.6;
    color: var(--white);
    background-color: var(--black);
    opacity: 0;
    transition: opacity 0.3s ease;
}

body.loaded {
    opacity: 1;
}

.container {
    width: 85%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    text-align: center;
}

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

ul {
    list-style: none;
}

.btn {
    display: inline-block;
    background: linear-gradient(90deg, var(--accent) 0%, var(--light-accent) 100%);
    color: var(--white);
    padding: 12px 30px;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
    position: relative;
    z-index: 1;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(128, 128, 128, 0.2);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(128, 128, 128, 0.3);
    background: linear-gradient(90deg, var(--light-accent) 0%, var(--accent) 100%);
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 50px;
    color: var(--white);
    position: relative;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--accent);
    border-radius: 2px;
    box-shadow: 0 0 15px rgba(128, 128, 128, 0.8),
                0 0 30px rgba(128, 128, 128, 0.4);
    animation: line-glow 2s ease-in-out infinite alternate;
}

@keyframes line-glow {
    from {
        box-shadow: 0 0 15px rgba(128, 128, 128, 0.8),
                    0 0 30px rgba(128, 128, 128, 0.4);
    }
    to {
        box-shadow: 0 0 25px rgba(128, 128, 128, 1),
                    0 0 40px rgba(128, 128, 128, 0.6);
    }
}

/* 头部样式 */
header {
    background-color: rgba(0, 0, 0, 0.95);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 20px 0;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-img {
    height: 40px;
    width: auto;
    transition: transform 0.3s ease;
}

.logo-img:hover {
    transform: scale(1.1);
}

.logo h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: 2px;
    text-shadow: 0 0 20px rgba(128, 128, 128, 0.8),
                 0 0 40px rgba(128, 128, 128, 0.4),
                 0 0 60px rgba(128, 128, 128, 0.2);
    transition: all 0.3s ease;
}

.logo h1:hover {
    text-shadow: 0 0 30px rgba(128, 128, 128, 1),
                 0 0 50px rgba(128, 128, 128, 0.6),
                 0 0 80px rgba(128, 128, 128, 0.3);
}

/* 汉堡菜单样式 */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    padding: 5px;
    z-index: 1001;
    transition: all 0.3s ease;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--accent);
    margin: 3px 0;
    transition: all 0.3s ease;
    border-radius: 2px;
    box-shadow: 0 0 10px rgba(128, 128, 128, 0.5);
}

.hamburger.active span:nth-child(1) {
    transform: rotate(-45deg) translate(-5px, 6px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(45deg) translate(-5px, -6px);
}

nav ul {
    display: flex;
}

nav ul li {
    margin-left: 30px;
}

nav ul li a {
    font-size: 1rem;
    font-weight: 600;
    transition: all 0.3s ease;
    padding-bottom: 5px;
    position: relative;
}

nav ul li a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: all 0.3s ease;
    box-shadow: 0 0 10px rgba(128, 128, 128, 0.8);
}

nav ul li a:hover {
    color: var(--accent);
    text-shadow: 0 0 15px rgba(128, 128, 128, 0.8),
                 0 0 25px rgba(128, 128, 128, 0.4);
}

nav ul li a:hover::after {
    width: 100%;
    box-shadow: 0 0 15px rgba(128, 128, 128, 1),
                0 0 25px rgba(128, 128, 128, 0.6);
}

/* 英雄区样式 */
.hero {
    height: 100vh;
    background: linear-gradient(135deg, var(--black) 0%, var(--light-black) 40%, var(--dark-gray) 100%);
    display: flex;
    align-items: center;
    text-align: center;
    padding-top: 70px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 70% 30%, rgba(128, 128, 128, 0.1) 0%, rgba(0, 0, 0, 0.9) 70%);
    z-index: 1;
}

/* 浮动发光粒子效果 */
.hero::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background: url("data:image/svg+xml,%3Csvg width='100' height='100' viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M11 18c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm48 25c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm-43-7c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm63 31c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM34 90c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm56-76c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM12 86c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm28-65c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm23-11c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-6 60c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm29 22c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zM32 63c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm57-13c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-9-21c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM60 91c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM35 41c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM12 60c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2z' fill='rgba(128,128,128,0.3)' fill-rule='evenodd'/%3E%3C/svg%3E");
    opacity: 0.3;
    z-index: 2;
    animation: float-particles 20s linear infinite;
}

@keyframes float-particles {
    0% {
        transform: translateY(0) translateX(0);
        opacity: 0.3;
    }
    25% {
        transform: translateY(-20px) translateX(10px);
        opacity: 0.5;
    }
    50% {
        transform: translateY(-10px) translateX(-10px);
        opacity: 0.3;
    }
    75% {
        transform: translateY(-30px) translateX(5px);
        opacity: 0.6;
    }
    100% {
        transform: translateY(0) translateX(0);
        opacity: 0.3;
    }
}

.hero-content {
    position: relative;
    z-index: 3;
}

.hero-content h1 {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 20px;
    letter-spacing: 1px;
    text-shadow: 0 0 30px rgba(255, 255, 255, 0.3),
                 0 0 60px rgba(128, 128, 128, 0.2);
}

.hero-content h1 span {
    color: var(--light-accent);
    text-shadow: 0 0 20px rgba(160, 160, 160, 0.8),
                 0 0 40px rgba(160, 160, 160, 0.4),
                 0 0 60px rgba(160, 160, 160, 0.2);
    animation: glow-pulse 3s ease-in-out infinite alternate;
}

@keyframes glow-pulse {
    from {
        text-shadow: 0 0 20px rgba(160, 160, 160, 0.8),
                     0 0 40px rgba(160, 160, 160, 0.4),
                     0 0 60px rgba(160, 160, 160, 0.2);
    }
    to {
        text-shadow: 0 0 30px rgba(160, 160, 160, 1),
                     0 0 50px rgba(160, 160, 160, 0.6),
                     0 0 80px rgba(160, 160, 160, 0.3);
    }
}

.hero-content h2 {
    font-size: 1.8rem;
    font-weight: 400;
    margin-bottom: 30px;
    color: var(--gray);
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 40px;
    color: var(--gray);
}

/* 关于部分样式 */
.about {
    padding: 100px 0;
    position: relative;
    background-color: var(--dark-gray);
    overflow: hidden;
}

.about::before {
    content: '';
    position: absolute;
    top: -100px;
    right: -100px;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background: radial-gradient(circle, var(--accent) 0%, rgba(128, 128, 128, 0) 70%);
    opacity: 0.2;
}

.about-content {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 30px;
}

.about-text {
    max-width: 800px;
    text-align: center;
    margin: 0 auto;
}

.about-text p {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 20px;
}

/* 融合器部分样式 */
.about-fusion {
    padding: 100px 0;
    position: relative;
    background-color: var(--light-black);
    overflow: hidden;
}

.about-fusion::before {
    content: '';
    position: absolute;
    top: -150px;
    left: -150px;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background: radial-gradient(circle, var(--accent) 0%, rgba(128, 128, 128, 0) 70%);
    opacity: 0.2;
}

.about-fusion .about-content {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 30px;
}

.about-fusion .about-text {
    max-width: 800px;
    text-align: center;
    margin: 0 auto;
}

.about-fusion .about-text p {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 20px;
}

/* 网络盒子部分样式 */
.about-netbox {
    padding: 100px 0;
    position: relative;
    background-color: var(--dark-gray);
    overflow: hidden;
}

.about-netbox::after {
    content: '';
    position: absolute;
    bottom: -100px;
    right: -100px;
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: radial-gradient(circle, var(--accent) 0%, rgba(128, 128, 128, 0) 70%);
    opacity: 0.2;
    z-index: 1;
}

.about-netbox .about-content {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 30px;
}

.about-netbox .about-text {
    max-width: 800px;
    text-align: center;
    margin: 0 auto;
}

.about-netbox .about-text p {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 20px;
}

/* 价格部分样式 */
.pricing {
    padding: 100px 0;
    position: relative;
    background-color: var(--light-black);
    overflow: hidden;
}

.pricing::before {
    content: '';
    position: absolute;
    top: -100px;
    left: -100px;
    width: 250px;
    height: 250px;
    border-radius: 50%;
    background: radial-gradient(circle, var(--accent) 0%, rgba(128, 128, 128, 0) 70%);
    opacity: 0.1;
}

.pricing-cards {
    display: flex;
    justify-content: center;
    gap: 30px;
    flex-wrap: wrap;
}

.card {
    background-color: var(--dark-gray);
    border-radius: 15px;
    overflow: hidden;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.5);
    border: 1px solid #333;
    position: relative;
}

.card::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(45deg, 
                rgba(128, 128, 128, 0.3) 0%, 
                rgba(160, 160, 160, 0.1) 50%, 
                rgba(128, 128, 128, 0.3) 100%);
    border-radius: 17px;
    z-index: -1;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(128, 128, 128, 0.2),
                0 0 40px rgba(128, 128, 128, 0.1);
}

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

.card.featured {
    border-color: var(--accent);
    background-color: var(--light-black);
    box-shadow: 0 10px 25px rgba(128, 128, 128, 0.3),
                0 0 30px rgba(128, 128, 128, 0.2);
}

.card.featured::before {
    background: linear-gradient(45deg, 
                rgba(128, 128, 128, 0.6) 0%, 
                rgba(160, 160, 160, 0.3) 50%, 
                rgba(128, 128, 128, 0.6) 100%);
    opacity: 1;
    animation: border-glow 3s ease-in-out infinite alternate;
}

@keyframes border-glow {
    from {
        background: linear-gradient(45deg, 
                    rgba(128, 128, 128, 0.6) 0%, 
                    rgba(160, 160, 160, 0.3) 50%, 
                    rgba(128, 128, 128, 0.6) 100%);
    }
    to {
        background: linear-gradient(45deg, 
                    rgba(160, 160, 160, 0.8) 0%, 
                    rgba(128, 128, 128, 0.5) 50%, 
                    rgba(160, 160, 160, 0.8) 100%);
    }
}

.card-header {
    background: var(--black);
    padding: 30px 20px;
    text-align: center;
    border-bottom: 2px solid var(--accent);
}

.card-header h3 {
    font-size: 1.8rem;
    margin-bottom: 10px;
}

.price {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 20px;
    text-shadow: 0 0 20px rgba(128, 128, 128, 0.8),
                 0 0 40px rgba(128, 128, 128, 0.4);
    animation: price-glow 2s ease-in-out infinite alternate;
}

@keyframes price-glow {
    from {
        text-shadow: 0 0 20px rgba(128, 128, 128, 0.8),
                     0 0 40px rgba(128, 128, 128, 0.4);
    }
    to {
        text-shadow: 0 0 30px rgba(128, 128, 128, 1),
                     0 0 50px rgba(128, 128, 128, 0.6);
    }
}

.card-body {
    padding: 30px 20px;
    text-align: center;
}

.card-body ul {
    margin-bottom: 30px;
}

.card-body ul li {
    margin-bottom: 15px;
    color: var(--gray);
}

/* 联系部分样式 */
.contact {
    padding: 100px 0;
    background-color: var(--light-black);
    position: relative;
    overflow: hidden;
}

.contact::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(128, 128, 128, 0.05) 0%, rgba(0, 0, 0, 0) 50%);
}

.contact-content {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    position: relative;
    z-index: 2;
}

.contact-info, .contact-form {
    flex: 0 0 48%;
}

.info-item {
    display: flex;
    align-items: center;
    margin-bottom: 30px;
}

.info-item i {
    font-size: 1.8rem;
    color: var(--accent);
    margin-right: 20px;
}

.info-item p {
    font-size: 1.1rem;
    color: var(--gray);
}

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

.contact-form input, .contact-form textarea {
    margin-bottom: 20px;
    padding: 15px;
    border: none;
    border-radius: 5px;
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--white);
    font-size: 1rem;
}

.contact-form textarea {
    height: 150px;
    resize: none;
}

.contact-form input::placeholder, .contact-form textarea::placeholder {
    color: rgba(255, 255, 255, 0.7);
}

.contact-form button {
    align-self: flex-start;
}

/* 页脚样式 */
footer {
    background-color: var(--black);
    padding: 40px 0;
    border-top: 1px solid #333;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.copyright p {
    font-size: 0.9rem;
    color: var(--gray);
}

.social-links a {
    color: var(--gray);
    font-size: 1.2rem;
    margin: 0 10px;
    transition: all 0.3s ease;
    display: inline-block;
    padding: 10px;
    border-radius: 50%;
    background: rgba(128, 128, 128, 0.1);
    position: relative;
    overflow: hidden;
}

.social-links a::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(45deg, 
                rgba(128, 128, 128, 0.3) 0%, 
                rgba(160, 160, 160, 0.1) 50%, 
                rgba(128, 128, 128, 0.3) 100%);
    border-radius: 50%;
    z-index: -1;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.social-links a:hover {
    color: var(--accent);
    transform: translateY(-3px);
    text-shadow: 0 0 15px rgba(128, 128, 128, 0.8),
                 0 0 25px rgba(128, 128, 128, 0.4);
    box-shadow: 0 5px 15px rgba(128, 128, 128, 0.3),
                0 0 20px rgba(128, 128, 128, 0.2);
}

.social-links a:hover::before {
    opacity: 1;
}

/* 响应式样式 */
@media screen and (max-width: 992px) {
    .container {
        width: 90%;
        padding: 0 15px;
    }

    .feature, .card {
        flex: 0 0 calc(50% - 20px);
        margin-bottom: 30px;
    }

    .contact-info, .contact-form {
        flex: 0 0 100%;
    }

    .contact-info {
        margin-bottom: 50px;
    }

    .pricing-cards {
        flex-direction: column;
        align-items: center;
    }

    .pricing-cards .card {
        width: 100%;
        max-width: 400px;
        margin-bottom: 30px;
    }
}

@media screen and (max-width: 768px) {
    .container {
        width: 95%;
        padding: 0 10px;
    }

    /* Header 移动端样式 */
    header {
        padding: 15px 0;
    }

    .hamburger {
        display: flex;
    }

    .logo-img {
        height: 30px;
    }
    
    .logo h1 {
        font-size: 1.8rem;
        letter-spacing: 1px;
    }

    /* 导航菜单移动端样式 */
    nav ul {
        position: fixed;
        top: 70px;
        left: -100%;
        background: rgba(0, 0, 0, 0.98);
        width: 100%;
        height: calc(100vh - 70px);
        flex-direction: column;
        align-items: center;
        justify-content: flex-start;
        padding: 50px 0;
        transition: all 0.3s ease;
        backdrop-filter: blur(10px);
        border-top: 1px solid var(--accent);
    }

    nav ul.active {
        left: 0;
    }

    nav ul li {
        margin: 20px 0;
        width: 100%;
        text-align: center;
    }

    nav ul li a {
        font-size: 1.2rem;
        padding: 15px 20px;
        display: block;
        border-radius: 8px;
        transition: all 0.3s ease;
    }

    nav ul li a:hover {
        background: rgba(128, 128, 128, 0.1);
        transform: translateY(-2px);
    }

    /* 英雄区移动端样式 */
    .hero {
        height: 100vh;
        padding-top: 70px;
    }

    .hero-content h1 {
        font-size: 2.5rem;
        line-height: 1.2;
        margin-bottom: 20px;
    }

    .hero-content h2 {
        font-size: 1.3rem;
        margin-bottom: 15px;
    }

    .hero-content p {
        font-size: 1rem;
        margin-bottom: 30px;
        line-height: 1.6;
    }

    /* 按钮移动端样式 */
    .btn {
        padding: 12px 30px;
        font-size: 1rem;
        margin: 10px 5px;
    }

    /* 卡片移动端样式 */
    .feature, .card {
        flex: 0 0 100%;
        margin-bottom: 30px;
        max-width: none;
    }

    .card.featured {
        transform: scale(1);
    }

    /* 价格卡片移动端样式 */
    .pricing-cards {
        flex-direction: column;
        align-items: center;
        gap: 30px;
    }

    .pricing-cards .card {
        width: 100%;
        max-width: 350px;
        margin: 0;
    }

    /* 标题移动端样式 */
    .section-title {
        font-size: 2rem;
        margin-bottom: 30px;
    }

    /* About页面移动端样式 */
    .about, .about-fusion, .about-netbox {
        padding: 60px 0;
    }

    .about-content {
        text-align: left;
    }

    .about-text p {
        font-size: 1rem;
        line-height: 1.7;
        margin-bottom: 20px;
    }
}

/* 小屏幕移动端样式 */
@media screen and (max-width: 480px) {
    .container {
        width: 100%;
        padding: 0 15px;
    }

    .logo h1 {
        font-size: 1.5rem;
    }

    .hero-content h1 {
        font-size: 2rem;
    }

    .hero-content h2 {
        font-size: 1.1rem;
    }

    .hero-content p {
        font-size: 0.9rem;
    }

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

    .btn {
        padding: 10px 25px;
        font-size: 0.9rem;
    }

    .pricing-cards .card {
        max-width: 320px;
    }

    nav ul {
        padding: 30px 0;
    }

    nav ul li a {
        font-size: 1.1rem;
        padding: 12px 15px;
    }
}

/* 触摸设备优化 */
@media (hover: none) and (pointer: coarse) {
    .btn, nav ul li a, .hamburger {
        min-height: 44px;
        min-width: 44px;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .card:hover {
        transform: none;
    }
    
    .btn:active {
        transform: scale(0.95);
    }
    
    .hamburger:active span {
        background: var(--light-accent);
    }
}

/* 防止移动端缩放 */
@viewport {
    width: device-width;
    zoom: 1.0;
}

/* 改善文本可读性 */
@media screen and (max-width: 768px) {
    body {
        -webkit-text-size-adjust: 100%;
        -moz-text-size-adjust: 100%;
        -ms-text-size-adjust: 100%;
    }
    
    /* 优化滚动性能 */
    * {
        -webkit-overflow-scrolling: touch;
    }
}

/* 加载动画样式 */
.loader-wrapper {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--black);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loader-wrapper.fade-out {
    opacity: 0;
    visibility: hidden;
}

.loader {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    border: 4px solid transparent;
    border-top-color: var(--light-accent);
    animation: loader-spin 1.5s cubic-bezier(0.68, -0.55, 0.27, 1.55) infinite;
    position: relative;
    box-shadow: 0 0 30px rgba(160, 160, 160, 0.8),
                0 0 60px rgba(160, 160, 160, 0.4);
}

.loader::after {
    content: '';
    position: absolute;
    top: 5px;
    left: 5px;
    right: 5px;
    bottom: 5px;
    border-radius: 50%;
    border: 4px solid transparent;
    border-top-color: var(--light-accent);
    animation: loader-spin 2s cubic-bezier(0.68, -0.55, 0.27, 1.55) infinite reverse;
    box-shadow: 0 0 20px rgba(160, 160, 160, 0.6),
                0 0 40px rgba(160, 160, 160, 0.3);
}

.loader-text {
    position: absolute;
    bottom: -60px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: 4px;
    position: relative;
    animation: loader-text-glow 2s ease-in-out infinite alternate;
    text-shadow: 0 0 20px rgba(128, 128, 128, 0.8),
                 0 0 40px rgba(128, 128, 128, 0.4),
                 0 0 60px rgba(128, 128, 128, 0.2);
}

/* 加载动画关键帧 */
@keyframes loader-rotate {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

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

@keyframes loader-text-glow {
    from {
        text-shadow: 0 0 20px rgba(128, 128, 128, 0.8),
                     0 0 40px rgba(128, 128, 128, 0.4),
                     0 0 60px rgba(128, 128, 128, 0.2);
    }
    to {
        text-shadow: 0 0 30px rgba(128, 128, 128, 1),
                     0 0 50px rgba(128, 128, 128, 0.6),
                     0 0 80px rgba(128, 128, 128, 0.3);
    }
}

/* 产品徽章发光效果 */
.product-badge {
    position: absolute;
    top: 15px;
    left: 15px;
    background: linear-gradient(135deg, var(--accent) 0%, var(--light-accent) 100%);
    color: var(--white);
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: 0 0 15px rgba(128, 128, 128, 0.6),
                0 0 30px rgba(128, 128, 128, 0.3);
    animation: badge-glow 2s ease-in-out infinite alternate;
}

@keyframes badge-glow {
    from {
        box-shadow: 0 0 15px rgba(128, 128, 128, 0.6),
                    0 0 30px rgba(128, 128, 128, 0.3);
    }
    to {
        box-shadow: 0 0 25px rgba(128, 128, 128, 0.8),
                    0 0 40px rgba(128, 128, 128, 0.4);
    }
}

/* 价格数字额外发光效果 */
.card-header h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--white);
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.3);
    transition: all 0.3s ease;
}

.card:hover .card-header h3 {
    text-shadow: 0 0 15px rgba(255, 255, 255, 0.5),
                 0 0 25px rgba(128, 128, 128, 0.3);
}

/* 了解更多按钮发光效果 */
.learn-more-btn {
    margin-top: 30px;
    text-align: center;
}

.btn-alt {
    background: transparent;
    border: 2px solid var(--accent);
    color: var(--accent);
    position: relative;
    overflow: hidden;
    box-shadow: 0 0 20px rgba(128, 128, 128, 0.3);
}

.btn-alt::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(128, 128, 128, 0.2), transparent);
    transition: left 0.5s ease;
}

.btn-alt:hover {
    background: var(--accent);
    color: var(--white);
    box-shadow: 0 0 30px rgba(128, 128, 128, 0.6),
                0 0 50px rgba(128, 128, 128, 0.3);
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.8);
}

.btn-alt:hover::before {
    left: 100%;
}