/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.7;
    color: #2c3e50;
    background-color: #f5f7fa;
    overflow-x: hidden;
    height: 100%;
}

html {
    height: 100%;
}

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

/* 导航栏 */
.navbar {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 20px;
}

.logo h1 {
    font-size: 24px;
    color: #1a365d;
    font-weight: 700;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, #1a365d 0%, #2a4365 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo h1 i {
    font-size: 28px;
    background: linear-gradient(135deg, #3182ce 0%, #38b2ac 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: spin 20s linear infinite;
}

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

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

.nav-item {
    position: relative;
}

.nav-link {
    text-decoration: none;
    color: #4a5568;
    font-weight: 600;
    font-size: 16px;
    transition: all 0.3s ease;
    padding: 8px 0;
    position: relative;
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 0;
    background: linear-gradient(135deg, #3182ce 0%, #2b6cb0 100%);
    transition: width 0.3s ease;
}

.nav-link:hover {
    color: #2b6cb0;
}

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

.nav-link.active {
    color: #2b6cb0;
    font-weight: 700;
}

.nav-link.active i {
    color: #3182ce;
    transform: scale(1.2) rotate(15deg);
}

.hamburger {
    display: none;
    cursor: pointer;
    padding: 5px;
}

.hamburger .bar {
    display: block;
    width: 28px;
    height: 3px;
    margin: 6px auto;
    transition: all 0.3s ease;
    background-color: #1a365d;
    border-radius: 2px;
}

/* 固定背景 */
.hero-fixed {
    position: relative;
    height: 100vh;
    overflow: hidden;
    margin: 0;
    padding: 0;
    top: 0;
    left: 0;
    right: 0;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding-top: 100px;
    background-size: cover !important;
    background-position: center center !important;
    background-repeat: no-repeat !important;
    background-attachment: fixed !important;
    margin: 0;
}

.hero-background .container {
    position: relative;
    z-index: 2;
    text-align: center;
    color: #fff;
    padding: 0 20px;
}

.hero-background h2 {
    font-size: 40px;
    margin-bottom: 25px;
    font-weight: 700;
    letter-spacing: -1px;
    line-height: 1.2;
    color: #ffffff;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    animation: slideInDown 1s ease-out;
}

.hero-background p {
    font-size: 22px;
    margin-bottom: 40px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    opacity: 0.95;
    font-weight: 300;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    animation: slideInUp 1s ease-out 0.3s both;
}

/* 动态导航按钮 */
.dynamic-nav-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
    transition: all 0.5s ease;
}

.nav-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 30px 20px;
    background: rgba(255, 255, 255, 0.2);
    border: 2px solid rgba(255, 255, 255, 0.5);
    border-radius: 20px;
    color: #fff;
    font-weight: 600;
    font-size: 18px;
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    min-width: 150px;
    flex: 1;
    max-width: 220px;
    position: relative;
    overflow: hidden;
}

.nav-btn i {
    font-size: 48px;
    margin-bottom: 15px;
    transition: all 0.3s ease;
}

.nav-btn span {
    transition: all 0.3s ease;
    font-size: 16px;
}

.nav-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    border-color: #fff;
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
}

.nav-btn:hover i {
    transform: rotate(360deg);
}

.nav-btn.active {
    background: rgba(255, 255, 255, 0.4);
    border-color: #fff;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.nav-btn.active i {
    transform: rotate(360deg);
}

.nav-btn:not(.active) {
    opacity: 0.8;
}

.nav-btn:not(.active):hover {
    opacity: 1;
}

/* 悬浮楼层导航 */
.floating-nav {
    position: fixed;
    right: 30px;
    top: 50%;
    transform: translateY(-50%);
    display: none;
    flex-direction: column;
    gap: 15px;
    z-index: 999;
    transition: all 0.5s ease;
}

.floating-nav-btn {
    width: 80px;
    height: 80px;
    border-radius: 12px;
    background: rgba(49, 130, 206, 0.8);
    border: 2px solid rgba(255, 255, 255, 0.8);
    color: #fff;
    font-size: 24px;
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px rgba(49, 130, 206, 0.4);
}

.nav-btn-text {
    font-size: 12px;
    margin-top: 5px;
    font-weight: 600;
    text-align: center;
    line-height: 1.2;
}

.floating-nav-btn:hover {
    background: rgba(49, 130, 206, 0.9);
    border-color: #fff;
    transform: scale(1.1) rotate(15deg);
    box-shadow: 0 8px 30px rgba(49, 130, 206, 0.6);
}

.floating-nav-btn.active {
    background: rgba(33, 105, 170, 1);
    border-color: #fff;
    transform: scale(1.2);
    box-shadow: 0 10px 40px rgba(49, 130, 206, 0.8);
}

.floating-nav-btn.top-btn {
    background: rgba(56, 178, 172, 0.8);
    box-shadow: 0 4px 20px rgba(56, 178, 172, 0.4);
}

.floating-nav-btn.top-btn:hover {
    background: rgba(56, 178, 172, 0.9);
    box-shadow: 0 8px 30px rgba(56, 178, 172, 0.6);
}

/* 全屏轮播图 */
.hero-slider {
    position: relative;
    height: 100vh;
    overflow: hidden;
    margin: 0;
    padding: 0;
    top: 0;
    left: 0;
    right: 0;
}

.slider-container {
    position: relative;
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 1s ease-in-out;
    background-size: cover !important;
    background-position: center center !important;
    background-repeat: no-repeat !important;
    background-attachment: fixed !important;
    margin: 0;
    padding: 0;
}

.slide.active {
    opacity: 1;
    visibility: visible;
}

.slide .container {
    position: relative;
    z-index: 2;
    text-align: center;
    color: #fff;
    padding: 0 20px;
}

.slide h2 {
    font-size: 56px;
    margin-bottom: 25px;
    font-weight: 700;
    letter-spacing: -1px;
    line-height: 1.2;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    animation: slideInDown 1s ease-out;
}

.slide p {
    font-size: 22px;
    margin-bottom: 25px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    opacity: 0.95;
    font-weight: 300;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    animation: slideInUp 1s ease-out 0.3s both;
}

/* 企业口号样式 */
.company-slogan {
    font-size: 24px;
    font-weight: 700;
    color: #fff;
    text-align: center;
    margin: 30px 0;
    padding: 20px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    backdrop-filter: blur(10px);
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    letter-spacing: 1px;
    animation: slideInUp 1s ease-out 0.45s both, gradientShift 3s ease infinite;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
    position: relative;
    overflow: hidden;
    background-size: 200% 200%;
}

.company-slogan::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left 0.8s ease;
    animation: shine 2s ease infinite;
}

.company-slogan:hover::before {
    left: 100%;
}

@keyframes shine {
    0% {
        left: -100%;
    }
    50% {
        left: 100%;
    }
    100% {
        left: 100%;
    }
}

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

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 25px;
    flex-wrap: wrap;
    animation: slideInUp 1s ease-out 0.6s both;
}

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

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

.slider-controls {
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    transform: translateY(-50%);
    display: flex;
    justify-content: space-between;
    padding: 0 30px;
    z-index: 3;
}

.prev-btn, .next-btn {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    border: 2px solid rgba(255, 255, 255, 0.5);
    color: #fff;
    font-size: 24px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(10px);
}

.prev-btn:hover, .next-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    border-color: #fff;
    transform: scale(1.1);
}

.slider-indicators {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 3;
}

.indicator {
    width: 15px;
    height: 15px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: all 0.3s ease;
}

.indicator.active {
    background: #fff;
    width: 40px;
    border-radius: 10px;
}

.btn {
    display: inline-block;
    padding: 15px 35px;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    font-size: 16px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s ease;
}

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

.btn.btn-clicked {
    transform: scale(0.95);
    transition: transform 0.1s ease;
}

.btn-primary {
    background: linear-gradient(135deg, #38b2ac 0%, #319795 100%);
    color: #fff;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #319795 0%, #2c7a7b 100%);
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
}

.btn-secondary {
    background-color: transparent;
    color: #fff;
    border: 2px solid rgba(255, 255, 255, 0.8);
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.1);
    border-color: #fff;
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
}

/* 通用 section 样式 */
section {
    position: relative;
}
#about{
    padding: 5px 0;
}
section h2 {
    font-size: 36px;
    text-align: center;
    margin-bottom: 60px;
    color: #1a365d;
    font-weight: 700;
    letter-spacing: -0.5px;
    position: relative;
    display: inline-block;
    left: 50%;
    transform: translateX(-50%);
}
#about  h2 {
    margin-bottom: 10px;
}
section h2::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(135deg, #3182ce 0%, #2b6cb0 100%);
    border-radius: 2px;
}

/* 关于我们 */
.about {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.95) 0%, rgba(248, 250, 252, 0.9) 100%), url('src/简介厂房/厂房.png');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    position: relative;
}

.about::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.8) 0%, rgba(248,250,252,0.9) 100%);
    z-index: 0;
}

.about .container {
    position: relative;
    z-index: 1;
}

/* 公司简介部分 */
.about-intro {
    margin-bottom: 60px;
}

.intro-content {
    background: #fff;
    border-radius: 16px;
    padding: 40px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.intro-content h3 {
    font-size: 28px;
    color: #1a365d;
    font-weight: 700;
    margin-bottom: 25px;
    position: relative;
    display: inline-block;
}

.intro-content h3::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 60px;
    height: 3px;
    background: linear-gradient(135deg, #3182ce 0%, #38b2ac 100%);
    border-radius: 2px;
}

.intro-content p {
    margin-bottom: 20px;
    font-size: 16px;
    line-height: 1.8;
    color: #4a5568;
    font-weight: 400;
    text-align: justify;
}

/* 企业荣誉墙部分 */
.honor-wall-section {
    margin-top: 40px;
}

/* 关于我们部分口号样式 */
.about-slogan {
    font-size: 12px; 
    color: #1a365d;
    text-align: center;
    padding: 0 5px;
    background: linear-gradient(135deg, rgba(49, 130, 206, 0.1) 0%, rgba(56, 178, 172, 0.1) 100%);
    border-radius: 12px;
    letter-spacing: 0.5px;
    line-height: 1.5;
    box-shadow: 0 4px 15px rgba(49, 130, 206, 0.1);
    position: relative;
    overflow: hidden;
}

.about-slogan::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(49, 130, 206, 0.2), transparent);
    transition: left 0.8s ease;
}

.about-slogan:hover::before {
    left: 100%;
}

.about-text p {
    margin-bottom: 20px;
    font-size: 16px;
    line-height: 1.8;
    color: #4a5568;
    font-weight: 400;
    text-align: justify;
}

.about-images {
    position: relative;
}

.about-images::before {
    content: '';
    position: absolute;
    top: -20px;
    left: -20px;
    right: -20px;
    bottom: -20px;
    background: linear-gradient(135deg, #3182ce 0%, #2b6cb0 100%);
    border-radius: 16px;
    z-index: -1;
    opacity: 0.1;
    transition: all 0.3s ease;
}

.about-images:hover::before {
    opacity: 0.15;
    transform: scale(1.02);
}

/* 荣誉墙样式 */
.honor-wall {
    background: #fff;
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    padding: 40px;
}

.honor-wall h3 {
    font-size: 28px;
    color: #1a365d;
    font-weight: 700;
    margin-bottom: 40px;
    text-align: center;
    position: relative;
    padding-bottom: 15px;
}

.honor-wall h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: linear-gradient(135deg, #3182ce 0%, #38b2ac 100%);
    border-radius: 2px;
}

/* 荣誉分类 */
.honor-category {
    margin-bottom: 50px;
}

.honor-category:last-child {
    margin-bottom: 0;
}

.honor-category h4 {
    font-size: 22px;
    color: #2b6cb0;
    font-weight: 700;
    margin-bottom: 25px;
    padding-left: 15px;
    border-left: 4px solid #3182ce;
}

/* 荣誉墙网格布局 */
.honor-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 20px;
}

.honor-item {
    background: #fff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border: 1px solid #e2e8f0;
}

.honor-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    border-color: #3182ce;
}

.honor-item img {
    width: 100%;
    height: auto;
    object-fit: cover;
    transition: all 0.3s ease;
    aspect-ratio: 1 / 1; /* 正方形比例 */
}

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

/* 证书照片 - A4 比例 */
.honor-item.certificate img {
    aspect-ratio: 1 / 1.414; /* A4 比例 */
    padding: 15px;
    background: #f8f9fa;
}

.honor-caption {
    padding: 15px;
    text-align: center;
    font-weight: 600;
    color: #1a365d;
    background: #fff;
    border-top: 1px solid #e2e8f0;
    font-size: 14px;
}

.honor-item:hover .honor-caption {
    background: #f8fafc;
    color: #2b6cb0;
}

/* 鹏创系统 */
.system {
    background: linear-gradient(135deg, rgba(248, 250, 252, 0.95) 0%, rgba(226, 232, 240, 0.9) 100%), url('src/主营产品/不锈钢BA管.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    position: relative;
    overflow: hidden;
}

.system::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(248,250,252,0.8) 0%, rgba(226,232,240,0.9) 100%);
    z-index: 0;
}

.system .container {
    position: relative;
    z-index: 1;
}

.system::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #3182ce, #38b2ac, #3182ce);
    background-size: 200% 100%;
    animation: gradientShift 3s ease infinite;
    z-index: 1;
}

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

.system-cards, .processing-cards, .tools-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 40px;
}

.card, .pdf-preview, .calculator {
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
    padding: 40px 30px;
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    text-align: center;
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.5);
}

.card-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #3182ce 0%, #38b2ac 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    font-size: 32px;
    color: #fff;
    box-shadow: 0 8px 25px rgba(49, 130, 206, 0.3);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.card-icon::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left 0.5s ease;
}

.card:hover .card-icon {
    transform: scale(1.1) rotate(5deg);
    box-shadow: 0 12px 35px rgba(49, 130, 206, 0.4);
}

.card:hover .card-icon::before {
    left: 100%;
}

.card::before, .pdf-preview::before, .calculator::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #3182ce 0%, #38b2ac 100%);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.card:hover, .pdf-preview:hover, .calculator:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.15);
    border-color: rgba(49, 130, 206, 0.3);
}

.card:hover::before, .pdf-preview:hover::before, .calculator:hover::before {
    transform: scaleX(1);
}

.card h3, .pdf-preview h3, .calculator h3 {
    font-size: 26px;
    margin-bottom: 20px;
    color: #1a365d;
    font-weight: 700;
    letter-spacing: -0.5px;
    position: relative;
    z-index: 1;
}

.card p, .pdf-preview p, .calculator p {
    margin-bottom: 30px;
    color: #4a5568;
    line-height: 1.8;
    font-size: 17px;
    position: relative;
    z-index: 1;
}

/* 加工服务 */
.processing {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.95) 0%, rgba(248, 250, 252, 0.9) 100%), url('src/生产设备/抛光喷砂.png');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    position: relative;
}

.processing::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.8) 0%, rgba(248,250,252,0.9) 100%);
    z-index: 0;
}

.processing .container {
    position: relative;
    z-index: 1;
}

/* 工具文件 */
.tools {
    background: linear-gradient(135deg, rgba(248, 250, 252, 0.95) 0%, rgba(226, 232, 240, 0.9) 100%), url('src/检测照片/超声波探伤检测.JPG');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    position: relative;
}

.tools::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(248,250,252,0.8) 0%, rgba(226,232,240,0.9) 100%);
    z-index: 0;
}

.tools .container {
    position: relative;
    z-index: 1;
}

/* 联系我们 */
.contact {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.95) 0%, rgba(248, 250, 252, 0.9) 100%), url('src/成品仓库/物流仓储.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    position: relative;
    padding: 30px 0;
}

.contact::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.8) 0%, rgba(248,250,252,0.9) 100%);
    z-index: 0;
}

.contact .container {
    position: relative;
    z-index: 1;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 50px;
    text-align: center;
}

.contact-item {
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
    padding: 40px 30px;
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.5);
}

.contact-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
    border-color: rgba(49, 130, 206, 0.3);
}

.contact-item h3 {
    font-size: 22px;
    margin-bottom: 20px;
    color: #1a365d;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.contact-item h3::before {
    content: '';
    width: 4px;
    height: 20px;
    background: linear-gradient(135deg, #3182ce 0%, #38b2ac 100%);
    border-radius: 2px;
}

.contact-item p {
    color: #4a5568;
    font-size: 17px;
    font-weight: 400;
    line-height: 1.6;
}

/* 页脚 */
.footer {
    background: linear-gradient(135deg, #1a365d 0%, #2d3748 100%);
    color: #fff;
    padding: 80px 0 40px;
    position: relative;
    overflow: hidden;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #3182ce, #38b2ac, #3182ce);
    background-size: 200% 100%;
    animation: gradientShift 3s ease infinite;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 50px;
    margin-bottom: 50px;
    position: relative;
    z-index: 1;
}

.footer-logo h3 {
    font-size: 32px;
    margin-bottom: 25px;
    font-weight: 700;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, #fff 0%, #a0aec0 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.footer-links a {
    color: #cbd5e0;
    text-decoration: none;
    transition: all 0.3s ease;
    font-size: 16px;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.footer-links a::before {
    content: '→';
    color: #3182ce;
    opacity: 0;
    transform: translateX(-10px);
    transition: all 0.3s ease;
}

.footer-links a:hover {
    color: #3182ce;
    transform: translateX(5px);
}

.footer-links a:hover::before {
    opacity: 1;
    transform: translateX(0);
}

.footer-contact p {
    margin-bottom: 15px;
    color: #cbd5e0;
    font-size: 16px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.footer-contact p::before {
    content: '';
    width: 2px;
    height: 16px;
    background: linear-gradient(135deg, #3182ce 0%, #38b2ac 100%);
    border-radius: 2px;
}

.footer-bottom {
    text-align: center;
    padding-top: 40px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #a0aec0;
    font-size: 15px;
    position: relative;
    z-index: 1;
}

.footer-bottom::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 1px;
    background: linear-gradient(90deg, transparent, #3182ce, transparent);
}

/* 页面横幅样式 */
.page-banner {
    margin-top: 0;
}

.page-banner .banner-background {
    min-height: 550px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    padding-top: 80px;
}

.page-banner .container {
    position: relative;
    z-index: 2;
}

.page-banner h2 {
    font-size: 48px;
    color: #fff;
    margin-bottom: 20px;
    text-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
    font-weight: 700;
    letter-spacing: 2px;
}

.page-banner p {
    font-size: 20px;
    color: rgba(255, 255, 255, 0.9);
    text-shadow: 0 2px 15px rgba(0, 0, 0, 0.2);
    font-weight: 300;
}

/* 页面内容区域 */
.page-content {
    padding: 80px 0;
    background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
}

.page-content .container {
    max-width: 1400px;
}

/* 页面顶部导航栏 - 简约风格 */
.page-header {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 20px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.page-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    color: #fff;
    text-decoration: none;
}

.page-logo i {
    font-size: 28px;
    opacity: 0.9;
}

.page-logo span {
    font-size: 20px;
    font-weight: 600;
    letter-spacing: 1px;
}

.back-home-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    text-decoration: none;
    border-radius: 25px;
    font-size: 14px;
    font-weight: 500;
    border: 1px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.back-home-btn i {
    font-size: 14px;
    transition: transform 0.3s ease;
}

.back-home-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.4);
}

.back-home-btn:hover i {
    transform: translateX(-3px);
}

/* 内容卡片样式 */
.content-card {
    background: #fff;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
    padding: 50px;
    margin-bottom: 40px;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.content-card h3 {
    font-size: 28px;
    color: #1a365d;
    margin-bottom: 25px;
    font-weight: 700;
    position: relative;
    padding-bottom: 15px;
}

.content-card h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, #3182ce, #38b2ac);
    border-radius: 2px;
}

.content-card p {
    font-size: 16px;
    line-height: 2;
    color: #4a5568;
    margin-bottom: 15px;
}

.content-card ul {
    margin-left: 20px;
    color: #4a5568;
}

.content-card ul li {
    margin-bottom: 10px;
    line-height: 1.8;
}

/* 公司简介图文布局 */
.company-intro {
    display: flex;
    gap: 40px;
    align-items: flex-start;
}

.company-intro .intro-text {
    flex: 1;
}

.company-intro .intro-text p {
    margin-bottom: 15px;
}

.company-intro .intro-image {
    flex: 0 0 550px;
}

.company-intro .intro-image img {
    width: 100%;
    border-radius: 12px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
    transition: transform 0.3s ease;
}

.company-intro .intro-image img:hover {
    transform: scale(1.02);
}

.company-intro .image-caption {
    text-align: center;
    color: #718096;
    font-size: 14px;
    margin-top: 12px;
    font-style: italic;
}

/* 瀑布流图片画廊 */
.gallery-masonry {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    grid-auto-flow: dense;
}

.gallery-item {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    cursor: pointer;
    transition: all 0.4s ease;
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    aspect-ratio: 1 / 1;
    transition: transform 0.5s ease;
}

.gallery-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
    z-index: 10;
}

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

/* 大尺寸图片 - 占2行 */
.gallery-item-large {
    grid-row: span 2;
}

.gallery-item-large img {
    aspect-ratio: 1 / 2;
}

/* 宽图片 - 占2列 */
.gallery-item-wide {
    grid-column: span 2;
}

.gallery-item-wide img {
    aspect-ratio: 2 / 1;
}

/* 图片悬停遮罩 */
.gallery-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 15px;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
    transform: translateY(100%);
    transition: transform 0.4s ease;
}

.gallery-overlay span {
    color: #fff;
    font-size: 14px;
    font-weight: 600;
}

.gallery-item:hover .gallery-overlay {
    transform: translateY(0);
}

/* 证书展示样式 */
.certificate-section {
    margin-bottom: 50px;
}

.certificate-section:last-child {
    margin-bottom: 0;
}

.certificate-category-title {
    font-size: 18px;
    color: #2b6cb0;
    margin-bottom: 25px;
    padding-bottom: 12px;
    border-bottom: 2px solid #e2e8f0;
    display: flex;
    align-items: center;
    gap: 10px;
}

.certificate-category-title i {
    color: #3182ce;
}

.certificate-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 25px;
}

.certificate-grid-center {
    justify-items: center;
}

.certificate-card {
    width: 100%;
    max-width: 220px;
    perspective: 1000px;
}

.certificate-card-large {
    max-width: 240px;
}

.certificate-inner {
    position: relative;
    background: #fff;
    border-radius: 4px;
    padding: 12px;
    box-shadow:
        0 2px 8px rgba(0, 0, 0, 0.1),
        0 8px 20px rgba(0, 0, 0, 0.08),
        inset 0 0 0 1px rgba(0, 0, 0, 0.05);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    transform-style: preserve-3d;
}

/* 纸张褶皱效果 */
.certificate-inner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg,
        rgba(255,255,255,0.3) 0%,
        transparent 50%,
        rgba(0,0,0,0.02) 100%);
    pointer-events: none;
    border-radius: 4px;
}

.certificate-inner img {
    width: 100%;
    display: block;
    border-radius: 2px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.certificate-card:hover .certificate-inner {
    transform: translateY(-10px) rotateX(5deg) rotateY(-2deg);
    box-shadow:
        0 20px 40px rgba(0, 0, 0, 0.15),
        0 8px 15px rgba(49, 130, 206, 0.1);
}

.certificate-card:hover .certificate-inner img {
    transform: scale(1.02);
}

.certificate-name {
    text-align: center;
    font-size: 13px;
    color: #4a5568;
    margin-top: 12px;
    font-weight: 500;
    transition: color 0.3s ease;
}

.certificate-card:hover .certificate-name {
    color: #2b6cb0;
}

/* 证书装饰边框 */
.certificate-inner::after {
    content: '';
    position: absolute;
    top: 8px;
    left: 8px;
    right: 8px;
    bottom: 8px;
    border: 1px solid rgba(49, 130, 206, 0.1);
    border-radius: 2px;
    pointer-events: none;
    transition: border-color 0.3s ease;
}

.certificate-card:hover .certificate-inner::after {
    border-color: rgba(49, 130, 206, 0.3);
}

.page-banner .banner-background {
    height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.page-banner h2 {
    font-size: 42px;
    color: #fff;
    margin-bottom: 15px;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.page-banner p {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.9);
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

/* 首页导航卡片样式 */
.home-nav-buttons {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 25px;
    margin-top: 40px;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

.nav-btn-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 35px 25px;
    background: rgba(255, 255, 255, 0.15);
    border: 2px solid rgba(255, 255, 255, 0.4);
    border-radius: 16px;
    color: #fff;
    text-decoration: none;
    transition: all 0.4s ease;
    backdrop-filter: blur(10px);
    min-height: 180px;
}

.nav-btn-card i {
    font-size: 42px;
    margin-bottom: 15px;
    transition: all 0.4s ease;
}

.nav-btn-card span {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 10px;
}

.nav-btn-card p {
    font-size: 14px;
    opacity: 0.85;
    text-align: center;
    margin: 0;
}

.nav-btn-card:hover {
    background: rgba(255, 255, 255, 0.25);
    border-color: #fff;
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.25);
}

.nav-btn-card:hover i {
    transform: rotate(360deg) scale(1.1);
}

/* 返回首页按钮 - 顶部 */
.back-home-btn-top {
    position: absolute;
    top: 30px;
    left: 30px;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 22px;
    background: rgba(255, 255, 255, 0.15);
    color: #fff;
    text-decoration: none;
    border-radius: 50px;
    font-size: 15px;
    font-weight: 500;
    border: 1px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
    z-index: 100;
}

.back-home-btn-top i {
    font-size: 14px;
    transition: transform 0.3s ease;
}

.back-home-btn-top:hover {
    background: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateX(-5px);
}

.back-home-btn-top:hover i {
    transform: translateX(-3px);
}

/* 页面卡片网格 */
.page-cards-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    max-width: 900px;
    margin: 0 auto 50px;
}

.page-card {
    background: rgba(255, 255, 255, 0.12);
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 20px;
    padding: 40px 30px;
    text-align: center;
    backdrop-filter: blur(10px);
    transition: all 0.4s ease;
}

.page-card-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, rgba(255,255,255,0.2) 0%, rgba(255,255,255,0.1) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(255,255,255,0.3);
}

.page-card-icon i {
    font-size: 36px;
    color: #fff;
}

.page-card h3 {
    font-size: 22px;
    color: #fff;
    margin-bottom: 15px;
    font-weight: 700;
}

.page-card p {
    font-size: 15px;
    color: rgba(255,255,255,0.85);
    margin-bottom: 25px;
    line-height: 1.6;
}

.page-card .btn {
    background: rgba(255,255,255,0.2);
    border: 1px solid rgba(255,255,255,0.4);
    color: #fff;
}

.page-card .btn:hover {
    background: rgba(255,255,255,0.3);
    transform: translateY(-3px);
}

.page-card:hover {
    background: rgba(255, 255, 255, 0.18);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-8px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.25);
}

/* 品质等级信息区域 */
.quality-info-section {
    background: rgba(255,255,255,0.08);
    border-radius: 20px;
    padding: 40px;
    margin-top: 20px;
    border: 1px solid rgba(255,255,255,0.15);
}

.quality-info-section h3 {
    color: #fff;
    font-size: 24px;
    margin-bottom: 30px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.quality-info-section h3 i {
    color: #ffd700;
}

.quality-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
}

.quality-card {
    background: rgba(255,255,255,0.1);
    border-radius: 16px;
    padding: 25px;
    text-align: center;
    border: 1px solid rgba(255,255,255,0.2);
    transition: all 0.3s ease;
}

.quality-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

.quality-badge {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: bold;
    color: #fff;
    margin: 0 auto 15px;
}

.quality-a .quality-badge { background: linear-gradient(135deg, #3182ce, #2b6cb0); }
.quality-b .quality-badge { background: linear-gradient(135deg, #38a169, #2f855a); }
.quality-c .quality-badge { background: linear-gradient(135deg, #ed8936, #dd6b20); }

.quality-card h4 {
    color: #fff;
    font-size: 18px;
    margin-bottom: 12px;
}

.quality-card p {
    color: rgba(255,255,255,0.8);
    font-size: 14px;
    line-height: 1.7;
}

/* 服务信息区域 */
.service-info-section {
    background: rgba(255,255,255,0.08);
    border-radius: 20px;
    padding: 40px;
    margin-top: 20px;
    border: 1px solid rgba(255,255,255,0.15);
}

.service-info-section h3 {
    color: #fff;
    font-size: 24px;
    margin-bottom: 30px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.service-cards {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 15px;
}

.service-card {
    background: rgba(255,255,255,0.1);
    border-radius: 12px;
    padding: 20px 15px;
    text-align: center;
    border: 1px solid rgba(255,255,255,0.2);
    transition: all 0.3s ease;
}

.service-card i {
    font-size: 28px;
    color: #fff;
    margin-bottom: 10px;
    display: block;
}

.service-card span {
    color: rgba(255,255,255,0.9);
    font-size: 14px;
    font-weight: 500;
}

.service-card:hover {
    background: rgba(255,255,255,0.15);
    transform: translateY(-3px);
}

/* 工具信息区域 */
.tools-info-section {
    background: rgba(255,255,255,0.08);
    border-radius: 20px;
    padding: 40px;
    margin-top: 20px;
    border: 1px solid rgba(255,255,255,0.15);
}

.tools-info-section h3 {
    color: #fff;
    font-size: 24px;
    margin-bottom: 30px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.tool-items {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
}

.tool-item {
    background: rgba(255,255,255,0.1);
    border-radius: 16px;
    padding: 30px 25px;
    text-align: center;
    border: 1px solid rgba(255,255,255,0.2);
    transition: all 0.3s ease;
}

.tool-item i {
    font-size: 36px;
    color: #fff;
    margin-bottom: 15px;
}

.tool-item span {
    display: block;
    color: #fff;
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
}

.tool-item p {
    color: rgba(255,255,255,0.7);
    font-size: 14px;
}

.tool-item:hover {
    background: rgba(255,255,255,0.15);
    transform: translateY(-5px);
}

/* 联系横幅 */
.contact-banner {
    background: linear-gradient(135deg, rgba(49, 130, 206, 0.6) 0%, rgba(43, 108, 176, 0.6) 100%);
    border-radius: 50px;
    padding: 20px 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    margin-top: 30px;
    border: 1px solid rgba(255,255,255,0.2);
}

.contact-banner i {
    font-size: 24px;
    color: #fff;
}

.contact-banner span {
    color: #fff;
    font-size: 18px;
}

.contact-banner strong {
    font-size: 22px;
}

/* 信息横幅 */
.info-banner {
    background: linear-gradient(135deg, rgba(237, 137, 54, 0.5) 0%, rgba(221, 107, 32, 0.5) 100%);
    border-radius: 50px;
    padding: 20px 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    margin-top: 30px;
    border: 1px solid rgba(255,255,255,0.2);
}

.info-banner i {
    font-size: 24px;
    color: #ffd700;
}

.info-banner span {
    color: #fff;
    font-size: 18px;
}

/* 小程序二维码样式 */
.page-card img {
    width: 160px;
    height: 160px;
    border-radius: 12px;
    margin: 15px auto 20px;
    display: block;
    background: #fff;
    padding: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease;
}

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

/* 功能介绍样式 */
.feature-intro {
    background: #fff;
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.feature-intro .intro-content {
    padding: 40px;
}

.feature-intro h3 {
    font-size: 28px;
    color: #1a365d;
    font-weight: 700;
    margin-bottom: 25px;
    position: relative;
    display: inline-block;
}

.feature-intro h3::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 60px;
    height: 3px;
    background: linear-gradient(135deg, #3182ce 0%, #38b2ac 100%);
    border-radius: 2px;
}

.feature-intro p {
    margin-bottom: 15px;
    font-size: 16px;
    line-height: 1.8;
    color: #4a5568;
}

.feature-intro ul {
    color: #4a5568;
}

.feature-intro ul li {
    margin-bottom: 8px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hamburger {
        display: block;
    }

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

    .hamburger.active .bar:nth-child(1) {
        transform: translateY(9px) rotate(45deg);
    }

    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-9px) rotate(-45deg);
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 80px;
        gap: 0;
        flex-direction: column;
        background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
        width: 100%;
        text-align: center;
        transition: 0.3s ease;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
        padding: 20px 0;
        border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    }

    .nav-item {
        margin: 15px 0;
    }

    .nav-link {
        font-size: 17px;
        padding: 10px 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .hero {
        padding: 120px 0 80px;
    }

    .hero h2 {
        font-size: 32px;
        line-height: 1.3;
    }

    .hero p {
        font-size: 17px;
        padding: 0 15px;
    }

    .cta-buttons {
        flex-direction: column;
        align-items: center;
        gap: 20px;
    }

    .btn {
        width: 200px;
        text-align: center;
    }

    section {
        padding: 80px 0;
    }

    section h2 {
        font-size: 30px;
        margin-bottom: 5px;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }

    .about-text p {
        font-size: 17px;
        padding: 0 15px;
    }

    .about-images {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .about-images img {
        width: 100%;
        max-width: 400px;
        height: 250px;
        margin: 0 auto;
    }

    .about-images img:nth-child(2) {
        margin-top: 0;
    }

    .system-cards, .processing-cards, .tools-content {
        grid-template-columns: 1fr;
        gap: 30px;
        padding: 0 15px;
    }

    .card, .pdf-preview, .calculator {
        padding: 35px 25px;
    }

    .contact-info {
        grid-template-columns: 1fr;
        gap: 30px;
        padding: 0 15px;
    }

    .footer {
        padding: 60px 0 30px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
        padding: 0 20px;
        text-align: center;
    }

    .footer-links {
        align-items: center;
    }

    .footer-contact p {
        justify-content: center;
    }

    /* 首页导航卡片响应式 */
    .home-nav-buttons {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
        padding: 0 10px;
    }

    .nav-btn-card {
        padding: 25px 15px;
        min-height: 150px;
    }

    .nav-btn-card i {
        font-size: 32px;
        margin-bottom: 10px;
    }

    .nav-btn-card span {
        font-size: 16px;
    }

    .nav-btn-card p {
        font-size: 12px;
    }

    .hero-background h2 {
        font-size: 36px;
    }

    .company-slogan {
        font-size: 16px;
        padding: 15px;
    }

    /* 页面横幅响应式 */
    .page-banner .banner-background {
        min-height: 280px;
        padding-top: 70px;
    }

    .page-banner h2 {
        font-size: 32px;
    }

    .page-banner p {
        font-size: 16px;
    }

    /* 页面顶部导航栏响应式 */
    .page-header {
        padding: 15px 20px;
    }

    .page-logo span {
        display: none;
    }

    .page-logo i {
        font-size: 24px;
    }

    .back-home-btn {
        padding: 8px 14px;
        font-size: 13px;
    }

    .back-home-btn span {
        display: none;
    }

    /* 内容卡片响应式 */
    .content-card {
        padding: 30px 25px;
        margin-bottom: 30px;
    }

    .content-card h3 {
        font-size: 22px;
    }

    .page-content {
        padding: 50px 0;
    }

    /* 公司简介响应式 */
    .company-intro {
        flex-direction: column;
        gap: 25px;
    }

    .company-intro .intro-image {
        flex: none;
        max-width: 100%;
    }

    .company-intro .intro-image img {
        max-height: 300px;
        object-fit: cover;
    }

    /* 瀑布流画廊响应式 */
    .gallery-masonry {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }

    .gallery-item-large,
    .gallery-item-wide {
        grid-column: span 1;
        grid-row: span 1;
    }

    .gallery-item-large img,
    .gallery-item-wide img {
        aspect-ratio: 1 / 1;
    }

    /* 证书展示响应式 */
    .certificate-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

    .certificate-card,
    .certificate-card-large {
        max-width: 100%;
    }

    .certificate-category-title {
        font-size: 16px;
    }

    .certificate-section {
        margin-bottom: 40px;
    }

    /* 返回首页按钮响应式 */
    .back-home-btn-top {
        top: 15px;
        left: 15px;
        padding: 10px 16px;
        font-size: 14px;
    }

    .back-home-btn-top span {
        display: none;
    }

    .back-home-btn-top i {
        font-size: 16px;
    }

    /* 页面卡片响应式 */
    .page-cards-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .page-card {
        padding: 30px 20px;
    }

    /* 品质等级响应式 */
    .quality-cards {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .quality-info-section {
        padding: 25px 20px;
    }

    /* 服务卡片响应式 */
    .service-cards {
        grid-template-columns: repeat(3, 1fr);
        gap: 10px;
    }

    .service-card {
        padding: 15px 10px;
    }

    .service-card i {
        font-size: 22px;
    }

    .service-card span {
        font-size: 12px;
    }

    /* 工具项响应式 */
    .tool-items {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .tools-info-section {
        padding: 25px 20px;
    }

    /* 横幅响应式 */
    .contact-banner,
    .info-banner {
        padding: 15px 20px;
        flex-direction: column;
        text-align: center;
        border-radius: 20px;
    }

    .contact-banner span,
    .info-banner span {
        font-size: 15px;
    }
}

@media (max-width: 480px) {
    .navbar .container {
        padding: 15px 20px;
    }

    .logo h1 {
        font-size: 24px;
    }

    .hero {
        padding: 110px 0 70px;
    }

    .hero h2 {
        font-size: 28px;
    }

    .hero p {
        font-size: 16px;
    }

    section {
        padding: 60px 0;
    }

    section h2 {
        font-size: 26px;
        margin-bottom: 30px;
    }

    .card, .pdf-preview, .calculator {
        padding: 30px 20px;
    }

    .card h3, .pdf-preview h3, .calculator h3 {
        font-size: 24px;
    }

    .card p, .pdf-preview p, .calculator p {
        font-size: 16px;
    }

    .btn {
        padding: 12px 28px;
        font-size: 15px;
        width: 180px;
    }

    .contact-item {
        padding: 30px 20px;
    }

    .footer-content {
        gap: 35px;
    }

    .footer-logo h3 {
        font-size: 28px;
    }

    .footer-bottom {
        padding-top: 30px;
        font-size: 14px;
    }
}

/* 右侧悬浮导航 */
.side-nav {
    position: fixed;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: 8px;
    z-index: 999;
    transition: all 0.3s ease;
}

.side-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 65px;
    height: 65px;
    background: linear-gradient(135deg, #2b6cb0 0%, #1a365d 100%);
    border: none;
    border-radius: 12px;
    color: #fff;
    text-decoration: none;
    font-size: 11px;
    font-weight: 500;
    box-shadow: 0 4px 15px rgba(26, 54, 93, 0.4);
    transition: all 0.3s ease;
    cursor: pointer;
}

.side-nav-item i {
    font-size: 20px;
    margin-bottom: 5px;
    transition: transform 0.3s ease;
}

.side-nav-item:hover {
    background: linear-gradient(135deg, #3182ce 0%, #2b6cb0 100%);
    transform: translateX(-5px);
    box-shadow: 0 6px 20px rgba(49, 130, 206, 0.5);
}

.side-nav-item:hover i {
    transform: scale(1.15);
}

.side-nav-item.active {
    background: linear-gradient(135deg, #38b2ac 0%, #319795 100%);
    box-shadow: 0 6px 25px rgba(56, 178, 172, 0.5);
}

.side-nav-item.active i {
    transform: scale(1.1);
}

/* 悬浮导航响应式 */
@media (max-width: 768px) {
    .side-nav {
        right: 10px;
        gap: 6px;
    }

    .side-nav-item {
        width: 50px;
        height: 50px;
        font-size: 9px;
        border-radius: 10px;
    }

    .side-nav-item i {
        font-size: 16px;
        margin-bottom: 3px;
    }
}

@media (max-width: 480px) {
    .side-nav {
        right: 8px;
        gap: 5px;
    }

    .side-nav-item {
        width: 45px;
        height: 45px;
        font-size: 8px;
        border-radius: 8px;
    }

    .side-nav-item i {
        font-size: 14px;
        margin-bottom: 2px;
    }
}