/* 现代流体布局样式 - 针对1920px宽度和响应式设计 */

/* 全局变量 */
:root {
    --fluid-max-width: 1920px;
    --fluid-padding: clamp(20px, 4vw, 60px);
    --fluid-gap: clamp(16px, 2vw, 40px);
    --fluid-radius: clamp(8px, 1.2vw, 16px);
    --fluid-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
    --fluid-header-height: clamp(70px, 6vh, 90px);
    --fluid-section-padding: clamp(60px, 8vh, 120px) 0;
    --fluid-transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* 流体容器 */
.fluid-container {
    width: 100%;
    max-width: var(--fluid-max-width);
    margin: 0 auto;
    padding: 0 var(--fluid-padding);
    position: relative;
}

/* 流体网格系统 */
.fluid-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--fluid-gap);
    width: 100%;
}

.fluid-grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--fluid-gap);
    margin-bottom: clamp(40px, 5vw, 60px);
}

.fluid-grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--fluid-gap);
}

.fluid-grid-4 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--fluid-gap);
}

/* 流体卡片 */
.fluid-card {
    background: rgba(255, 255, 255, 0.9);
    border-radius: var(--fluid-radius);
    box-shadow: var(--fluid-shadow);
    padding: clamp(24px, 3vw, 40px);
    transition: var(--fluid-transition);
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    height: 100%;
    display: flex;
    flex-direction: column;
}

@media screen and (max-width: 576px) {
    .fluid-card {
        padding: clamp(16px, 4vw, 24px);
    }
}

.fluid-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.12);
}

/* 流体按钮 */
.fluid-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: clamp(12px, 2vw, 18px) clamp(24px, 4vw, 36px);
    border-radius: var(--fluid-radius);
    font-weight: 600;
    font-size: clamp(14px, 1.2vw, 18px);
    text-decoration: none;
    transition: var(--fluid-transition);
    cursor: pointer;
    border: none;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.fluid-btn-primary {
    background: linear-gradient(135deg, #1a365d, #2c5282);
    color: white;
    box-shadow: 0 4px 15px rgba(26, 54, 93, 0.3);
}

.fluid-btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(26, 54, 93, 0.4);
}

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

.fluid-btn-outline:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-3px);
}

/* 流体导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.05);
    transition: var(--fluid-transition);
    z-index: 1000;
    height: var(--fluid-header-height);
}

.navbar .fluid-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: clamp(10px, 2vw, 20px);
}

.nav-logo img {
    height: clamp(30px, 4vh, 50px);
    width: auto;
    transition: var(--fluid-transition);
}

.nav-logo span {
    font-size: clamp(18px, 2.2vw, 28px);
    font-weight: 700;
    color: var(--primary-color);
    letter-spacing: -0.5px;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: clamp(10px, 1.5vw, 30px);
    list-style: none;
}

.nav-link {
    color: var(--dark-color);
    font-size: clamp(14px, 1.1vw, 18px);
    font-weight: 500;
    padding: clamp(8px, 1vw, 12px) clamp(12px, 1.5vw, 20px);
    border-radius: var(--fluid-radius);
    text-decoration: none;
    transition: var(--fluid-transition);
    position: relative;
}

.nav-link:hover, .nav-link.active {
    background: rgba(26, 54, 93, 0.1);
    color: var(--primary-color);
}

.nav-link.btn-contact {
    background: var(--primary-color);
    color: white;
}

.nav-link.btn-contact:hover {
    background: #2c5282;
    transform: translateY(-2px);
}

/* 流体英雄区域 */
.fluid-hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: var(--fluid-header-height);
    background: linear-gradient(135deg, rgba(26, 54, 93, 0.85), rgba(44, 82, 130, 0.9)), 
                url('i/s/g11.webp') center/cover no-repeat;
    overflow: hidden;
}

.fluid-hero::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 60%);
    z-index: 1;
}

.fluid-hero-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: clamp(30px, 5vw, 60px);
    align-items: center;
    margin-bottom: clamp(40px, 6vh, 60px);
}

.fluid-hero-image img {
    width: 100%;
    height: auto;
    max-height: 320px;
    object-fit: cover;
    border-radius: var(--fluid-radius);
    box-shadow: var(--fluid-shadow);
    transition: transform 0.3s ease;
}

.fluid-hero-image img:hover {
    transform: scale(1.02);
}

.hero-main {
    display: grid;
    grid-template-columns: 3fr 2fr;
    gap: clamp(30px, 5vw, 60px);
    align-items: center;
}

.hero-content {
    position: relative;
    z-index: 2;
    color: white;
    text-align: left;
}

.hero-stats {
    display: flex;
    flex-direction: column;
    gap: clamp(16px, 2vw, 30px);
}

.fluid-hero-title {
    font-size: clamp(24px, 4vw, 42px);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: clamp(12px, 1.5vw, 20px);
    letter-spacing: -0.5px;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    background: linear-gradient(to right, #ffffff, #f0f8ff);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    position: relative;
    white-space: nowrap;
}

.fluid-hero-title::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -10px;
    width: 100px;
    height: 4px;
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    border-radius: 2px;
}

.fluid-hero-subtitle {
    font-size: clamp(16px, 2vw, 20px);
    line-height: 1.4;
    margin-bottom: clamp(20px, 2.5vw, 30px);
    font-weight: 500;
    color: rgba(255, 255, 255, 0.95);
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    max-width: 90%;
}

.fluid-hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: clamp(16px, 2vw, 24px);
    margin-bottom: clamp(40px, 5vw, 70px);
}

.stat-icon {
    font-size: clamp(24px, 3vw, 32px);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    margin-right: 15px;
}

.stat-content {
    flex: 1;
}

.fluid-hero-stat {
    display: flex;
    align-items: center;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 12px;
    padding: clamp(15px, 2vw, 20px);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.fluid-hero-stat h3 {
    font-size: clamp(32px, 4vw, 56px);
    font-weight: 800;
    margin-bottom: clamp(5px, 0.8vw, 10px);
    color: white;
    text-shadow: 0 3px 12px rgba(0, 0, 0, 0.3);
}

.fluid-hero-stat p {
    font-size: clamp(16px, 2vw, 18px);
    color: white;
    text-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
}

/* 流体部分 */
.fluid-section {
    padding: var(--fluid-section-padding);
    position: relative;
}

.fluid-section-header {
    text-align: center;
    max-width: min(800px, 90%);
    margin: 0 auto clamp(40px, 5vw, 70px);
}

.fluid-section-title {
    font-size: clamp(28px, 4vw, 48px);
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: clamp(12px, 1.5vw, 20px);
    position: relative;
    display: inline-block;
}

.fluid-section-title::after {
    content: "";
    position: absolute;
    width: clamp(40px, 5vw, 80px);
    height: 4px;
    background: linear-gradient(135deg, #f76b1a, #ff9a44);
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    border-radius: 2px;
}

.fluid-section-subtitle {
    font-size: clamp(16px, 2vw, 22px);
    color: var(--gray-color);
    line-height: 1.6;
}

/* 流体特色卡片 */
.fluid-feature {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: clamp(16px, 2vw, 30px);
}

.fluid-feature-icon {
    margin: 0 auto;
}

@media screen and (max-width: 576px) {
    .fluid-feature {
        gap: clamp(12px, 2vw, 20px);
    }
}

.fluid-feature-icon {
    font-size: clamp(32px, 4vw, 56px);
    width: clamp(60px, 7vw, 100px);
    height: clamp(60px, 7vw, 100px);
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(26, 54, 93, 0.1), rgba(44, 82, 130, 0.1));
    border-radius: 50%;
    flex-shrink: 0;
}

.fluid-feature-content h3 {
    font-size: clamp(18px, 2.2vw, 26px);
    margin-bottom: clamp(8px, 1vw, 16px);
    color: var(--primary-color);
}

.fluid-feature-content p {
    font-size: clamp(14px, 1.5vw, 18px);
    line-height: 1.6;
    color: var(--gray-color);
}

/* 流体图片容器 */
.fluid-image {
    border-radius: var(--fluid-radius);
    overflow: hidden;
    box-shadow: var(--fluid-shadow);
    position: relative;
    height: 100%;
    min-height: 250px;
}

@media screen and (max-width: 576px) {
    .fluid-image {
        min-height: 180px;
    }
}

.fluid-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--fluid-transition);
}

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

/* 流体页脚 */
.fluid-footer {
    background: linear-gradient(135deg, #1a365d, #2c5282);
    color: white;
    padding: clamp(40px, 5vw, 80px) 0 clamp(20px, 3vw, 40px);
}

.fluid-footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--fluid-gap);
    margin-bottom: clamp(30px, 4vw, 50px);
}

.fluid-footer-section h4 {
    font-size: clamp(18px, 2vw, 24px);
    margin-bottom: clamp(16px, 2vw, 24px);
    position: relative;
    padding-bottom: clamp(8px, 1vw, 12px);
}

.fluid-footer-section h4::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 40px;
    height: 3px;
    background: linear-gradient(135deg, #f76b1a, #ff9a44);
    border-radius: 2px;
}

.fluid-footer-section p {
    font-size: clamp(14px, 1.5vw, 18px);
    line-height: 1.6;
    margin-bottom: clamp(16px, 2vw, 24px);
    opacity: 0.9;
}

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

.fluid-footer-section ul li {
    margin-bottom: clamp(8px, 1vw, 12px);
}

.fluid-footer-section ul li a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    font-size: clamp(14px, 1.5vw, 18px);
    transition: var(--fluid-transition);
}

.fluid-footer-section ul li a:hover {
    color: white;
    padding-left: 5px;
}

.fluid-social-links {
    display: flex;
    gap: clamp(12px, 1.5vw, 20px);
}

.fluid-social-links a {
    width: clamp(36px, 4vw, 50px);
    height: clamp(36px, 4vw, 50px);
    background: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    color: white;
    font-size: clamp(16px, 2vw, 20px);
    transition: var(--fluid-transition);
}

.fluid-social-links a:hover {
    background: white;
    color: var(--primary-color);
    transform: translateY(-3px);
}

.fluid-footer-bottom {
    text-align: center;
    padding-top: clamp(16px, 2vw, 24px);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: clamp(14px, 1.5vw, 18px);
    opacity: 0.8;
}

/* 响应式断点 */
@media screen and (max-width: 1200px) {
    .fluid-grid-2 {
        grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    }
}

@media screen and (max-width: 992px) {
    .hero-main {
        grid-template-columns: 1fr;
        text-align: center;
        gap: clamp(20px, 3vw, 40px);
    }
    
    .hero-content {
        max-width: 100%;
        text-align: center;
        margin-bottom: 0;
    }
    
    .hero-stats {
        flex-direction: row;
        justify-content: center;
        gap: clamp(15px, 2vw, 25px);
        flex-wrap: wrap;
    }
    
    .fluid-hero-stat {
        flex: 1 1 120px;
        min-width: 120px;
    }
    
    .fluid-grid-3 {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    }
    
    .fluid-grid-4 {
        grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    }
    
    .fluid-feature {
        flex-direction: column;
        text-align: center;
    }
    
    .fluid-feature-icon {
        margin: 0 auto;
    }
}

@media screen and (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: var(--fluid-header-height);
        flex-direction: column;
        background-color: white;
        width: 100%;
        height: calc(100vh - var(--fluid-header-height));
        padding: clamp(20px, 4vw, 30px);
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        gap: clamp(15px, 3vw, 25px);
        overflow-y: auto;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hamburger {
        display: block;
        cursor: pointer;
        z-index: 1001;
    }
    
    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }
    
    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }
    
    .bar {
        display: block;
        width: 25px;
        height: 3px;
        margin: 5px auto;
        -webkit-transition: all 0.3s ease-in-out;
        transition: all 0.3s ease-in-out;
        background-color: var(--primary-color);
        border-radius: 2px;
    }
    
    .fluid-hero {
        padding: var(--fluid-header-height) 0 clamp(40px, 6vh, 60px);
    }
    
    .fluid-container {
        padding: 0 clamp(16px, 4vw, 20px);
    }
}

@media screen and (max-width: 576px) {
    .fluid-hero-title {
        font-size: clamp(20px, 5.5vw, 28px);
        white-space: normal;
        line-height: 1.3;
    }
    
    .fluid-hero-subtitle {
        font-size: clamp(14px, 3.5vw, 18px);
        max-width: 100%;
    }
    
    .fluid-hero-buttons {
        flex-direction: column;
        align-items: center;
        gap: clamp(12px, 2vw, 18px);
    }
    
    .fluid-hero-buttons .fluid-btn {
        width: 100%;
        max-width: 280px;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: clamp(12px, 2vw, 20px);
    }
    
    .fluid-hero-stat {
        flex-direction: row;
        text-align: left;
        width: 100%;
        max-width: 280px;
        margin: 0 auto;
    }
    
    .stat-icon {
        margin-right: 15px;
        margin-bottom: 0;
    }
    
    .fluid-grid-4 {
        grid-template-columns: 1fr;
        gap: clamp(16px, 3vw, 24px);
    }
    
    .fluid-grid-3 {
        grid-template-columns: 1fr;
    }
    
    .fluid-grid-2 {
        grid-template-columns: 1fr;
    }
    
    .fluid-footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .fluid-footer-section h4::after {
        left: 50%;
        transform: translateX(-50%);
    }
    
    .fluid-social-links {
        justify-content: center;
    }
}

/* 面包屑导航样式 */
.fluid-breadcrumb a:hover {
    color: var(--secondary-color);
}

.fluid-breadcrumb {
    position: relative;
}

.fluid-breadcrumb::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background: linear-gradient(to right, var(--primary-color), transparent);
    opacity: 0.1;
}