/* ===== 许鲜供应链官方网站 - 世界级UI设计优化 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 现代生鲜物流品牌色 - 专业绿色系渐变 */
    --primary-color: #1B5E20;
    --primary-gradient: linear-gradient(135deg, #2E7D32 0%, #4CAF50 50%, #81C784 100%);
    --secondary-color: #4CAF50;
    --accent-color: #FF9800;
    --text-color: #1a1a1a;
    --text-secondary: #666666;
    --text-light: #8c8c8c;
    --bg-light: #f8fafc;
    --bg-gradient: linear-gradient(135deg, #f8fafc 0%, #e8f5e9 100%);
    --white: #ffffff;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 12px 48px rgba(0, 0, 0, 0.15);
    --border-radius: 16px;
    --border-radius-sm: 12px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
    color: var(--text-color);
    line-height: 1.7;
    background: var(--bg-gradient);
    overflow-x: hidden;
}

/* 背景装饰元素 */
body::before {
    content: '';
    position: fixed;
    top: -50%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(76, 175, 80, 0.08) 0%, transparent 70%);
    z-index: -1;
    pointer-events: none;
}

body::after {
    content: '';
    position: fixed;
    bottom: -50%;
    left: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(76, 175, 80, 0.08) 0%, transparent 70%);
    z-index: -1;
    pointer-events: none;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== 导航栏 - 玻璃拟态现代设计 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    padding: 16px 0;
    transition: var(--transition);
    border-bottom: 1px solid rgba(76, 175, 80, 0.1);
}

.navbar.scrolled {
    padding: 12px 0;
    box-shadow: var(--shadow-md);
}

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

.navbar .logo {
    font-size: 24px;
    font-weight: 800;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 8px;
}

.nav-menu li {
    position: relative;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 20px;
    transition: var(--transition);
    display: block;
}

.nav-menu a:hover {
    color: var(--primary-color);
    background: rgba(76, 175, 80, 0.08);
}

.nav-menu a.active {
    color: var(--primary-color);
    background: rgba(76, 175, 80, 0.12);
    font-weight: 600;
}

.menu-toggle {
    display: none;
    font-size: 28px;
    cursor: pointer;
    color: var(--primary-color);
}

/* ===== Banner - 现代渐变背景 ===== */
.banner {
    margin-top: 76px;
    background: var(--primary-gradient);
    color: var(--white);
    padding: 140px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.banner::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -10%;
    width: 120%;
    height: 200%;
    background: radial-gradient(ellipse at center, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    animation: pulse 8s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 0.5; }
    50% { transform: scale(1.05); opacity: 0.8; }
}

.banner-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
}

.banner-content h1 {
    font-size: 56px;
    margin-bottom: 20px;
    font-weight: 800;
    letter-spacing: -1px;
    text-shadow: 0 2px 16px rgba(0, 0, 0, 0.2);
    animation: fadeInDown 0.8s ease-out;
}

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

.banner .slogan {
    font-size: 28px;
    margin-bottom: 24px;
    opacity: 0.95;
    font-weight: 500;
    animation: fadeInUp 0.8s ease-out 0.2s backwards;
}

.banner .subtitle {
    font-size: 20px;
    margin-bottom: 48px;
    opacity: 0.9;
    line-height: 1.8;
    animation: fadeInUp 0.8s ease-out 0.4s backwards;
}

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

.btn-primary {
    display: inline-block;
    padding: 18px 48px;
    background: var(--white);
    color: var(--primary-color);
    text-decoration: none;
    border-radius: 50px;
    font-weight: 700;
    font-size: 18px;
    transition: var(--transition);
    box-shadow: var(--shadow-lg);
    animation: fadeInUp 0.8s ease-out 0.6s backwards;
}

.btn-primary:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
}

.btn-primary:active {
    transform: translateY(-2px) scale(0.98);
}

/* ===== 通用章节样式 ===== */
section {
    padding: 100px 0;
}

.section-title {
    text-align: center;
    font-size: 42px;
    margin-bottom: 16px;
    color: var(--text-color);
    font-weight: 700;
    letter-spacing: -0.5px;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: var(--primary-gradient);
    margin: 16px auto 0;
    border-radius: 2px;
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    font-size: 18px;
    margin-bottom: 60px;
}

/* ===== 关于我们 ===== */
.about {
    background: var(--white);
}

.about-content {
    max-width: 900px;
    margin: 0 auto;
}

.about-text p {
    font-size: 19px;
    margin-bottom: 24px;
    color: var(--text-color);
    line-height: 1.8;
}

.features {
    margin-top: 40px;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 17px;
    padding: 16px 20px;
    background: rgba(76, 175, 80, 0.05);
    border-radius: var(--border-radius-sm);
    border-left: 4px solid var(--secondary-color);
    transition: var(--transition);
}

.feature-item:hover {
    background: rgba(76, 175, 80, 0.08);
    transform: translateX(4px);
}

.feature-icon {
    font-size: 24px;
}

/* ===== 业务板块 - 现代卡片设计 ===== */
.business {
    background: var(--bg-light);
}

.business-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
}

.business-card {
    background: var(--white);
    padding: 36px 28px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: var(--transition);
    border: 1px solid rgba(76, 175, 80, 0.08);
    position: relative;
    overflow: hidden;
}

.business-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-gradient);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.business-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.business-card:hover::before {
    transform: scaleX(1);
}

.business-icon {
    font-size: 64px;
    margin-bottom: 20px;
    transition: var(--transition);
}

.business-card:hover .business-icon {
    transform: scale(1.1) rotate(5deg);
}

.business-card h3 {
    font-size: 24px;
    margin-bottom: 12px;
    color: var(--primary-color);
    font-weight: 700;
}

.business-card p {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 16px;
}

/* ===== 覆盖区域 ===== */
.coverage {
    background: var(--white);
}

.coverage-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 32px;
    margin-bottom: 40px;
}

.coverage-item {
    text-align: center;
    padding: 32px 24px;
    background: var(--white);
    border: 2px solid transparent;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.coverage-item::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--primary-gradient);
    opacity: 0;
    transition: var(--transition);
    z-index: 0;
}

.coverage-item:hover::before {
    opacity: 0.05;
}

.coverage-item:hover {
    border-color: var(--secondary-color);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.coverage-item h4 {
    font-size: 22px;
    color: var(--primary-color);
    margin-bottom: 12px;
    font-weight: 700;
    position: relative;
    z-index: 1;
}

.coverage-item p {
    color: var(--text-secondary);
    font-size: 16px;
    position: relative;
    z-index: 1;
}

.coverage-summary {
    text-align: center;
    font-size: 20px;
    color: var(--primary-color);
    font-weight: 600;
    margin-top: 40px;
}

/* ===== 核心优势 ===== */
.advantage {
    background: var(--bg-light);
}

.advantage-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 32px;
    margin-bottom: 50px;
}

.advantage-item {
    text-align: center;
    background: var(--white);
    padding: 40px 24px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border: 1px solid rgba(76, 175, 80, 0.08);
}

.advantage-item:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
}

.advantage-number {
    font-size: 42px;
    font-weight: 800;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 12px;
}

.advantage-text {
    font-size: 17px;
    color: var(--text-secondary);
    font-weight: 500;
}

.advantage-details {
    max-width: 800px;
    margin: 0 auto;
    list-style: none;
    background: var(--white);
    padding: 32px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
}

.advantage-details li {
    font-size: 18px;
    padding: 14px 0;
    border-bottom: 1px solid rgba(76, 175, 80, 0.1);
    color: var(--text-color);
}

.advantage-details li:last-child {
    border-bottom: none;
}

/* ===== 诚邀合作 ===== */
.cooperation {
    background: var(--white);
}

.cooperation-text {
    text-align: center;
    font-size: 22px;
    margin-bottom: 50px;
    color: var(--text-secondary);
}

.cooperation-types {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
}

.cooperation-type {
    text-align: center;
    padding: 40px 24px;
    background: var(--bg-light);
    border-radius: var(--border-radius);
    transition: var(--transition);
    border: 2px solid transparent;
}

.cooperation-type:hover {
    background: rgba(76, 175, 80, 0.05);
    border-color: var(--secondary-color);
    transform: translateY(-4px);
}

.cooperation-type h4 {
    font-size: 22px;
    color: var(--primary-color);
    margin-bottom: 12px;
    font-weight: 700;
}

.cooperation-type p {
    color: var(--text-secondary);
    font-size: 16px;
}

/* ===== 联系我们 ===== */
.contact {
    background: var(--primary-gradient);
    color: var(--white);
    position: relative;
    overflow: hidden;
}

.contact::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
}

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

.contact .section-title {
    color: var(--white);
}

.contact .section-title::after {
    background: var(--white);
}

.contact-info {
    max-width: 650px;
    margin: 0 auto;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius);
    padding: 40px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.contact-item {
    display: flex;
    padding: 20px 0;
    font-size: 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.contact-item:last-child {
    border-bottom: none;
}

.contact-label {
    font-weight: 700;
    min-width: 140px;
}

.contact-value {
    opacity: 0.95;
}

.contact-slogan {
    text-align: center;
    margin-top: 40px;
    font-size: 20px;
    opacity: 0.95;
    line-height: 1.8;
}

/* ===== 页脚 ===== */
.footer {
    background: #1a1a1a;
    color: #aaaaaa;
    text-align: center;
    padding: 40px 0;
}

.footer p {
    font-size: 15px;
}

/* ===== 响应式设计 - 完美适配移动端 ===== */
@media (max-width: 968px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(12px);
        flex-direction: column;
        padding: 16px;
        box-shadow: var(--shadow-md);
        border-radius: 0 0 12px 12px;
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-menu a {
        padding: 12px 16px;
    }

    .menu-toggle {
        display: block;
    }

    .banner-content h1 {
        font-size: 36px;
    }

    .banner {
        padding: 80px 0;
    }

    .banner .slogan {
        font-size: 22px;
    }

    .section-title {
        font-size: 32px;
    }

    section {
        padding: 60px 0;
    }

    .features {
        grid-template-columns: 1fr;
    }

    .business-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .coverage-content {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .advantage-list {
        grid-template-columns: 1fr 1fr;
        gap: 24px;
    }

    .cooperation-types {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .contact-item {
        flex-direction: column;
    }

    .contact-label {
        min-width: auto;
        margin-bottom: 6px;
    }

    .contact-info {
        padding: 24px;
    }

    .btn-primary {
        padding: 16px 36px;
        font-size: 16px;
    }
}

@media (max-width: 480px) {
    .advantage-list {
        grid-template-columns: 1fr;
    }

    .banner-content h1 {
        font-size: 32px;
    }

    .container {
        padding: 0 16px;
    }
}

/* ===== 滚动平滑动画 ===== */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-light);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--primary-color), var(--secondary-color));
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, var(--secondary-color), var(--primary-color));
}

/* ===== 备案信息样式 ===== */
.footer {
    background: linear-gradient(135deg, #1B5E20 0%, #2E7D32 100%);
    color: #ffffff;
    padding: 2rem 0;
    margin-top: 4rem;
    border-top: 4px solid #4CAF50;
}

.footer-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 2rem;
}

.footer-info {
    flex: 2;
    min-width: 300px;
}

.footer-links {
    flex: 1;
    min-width: 200px;
}

.footer p {
    margin: 0.5rem 0;
    line-height: 1.6;
}

.beian-info a {
    color: #81C784;
    text-decoration: none;
    transition: color 0.3s;
    font-size: 0.9rem;
}

.beian-info a:hover {
    color: #ffffff;
    text-decoration: underline;
}

.domain-info, .tech-info {
    font-size: 0.85rem;
    color: #C8E6C9;
    margin-top: 0.3rem;
}

.footer-links a {
    color: #81C784;
    text-decoration: none;
    margin: 0 0.3rem;
    transition: color 0.3s;
}

.footer-links a:hover {
    color: #ffffff;
    text-decoration: underline;
}

.footer-links p {
    margin-bottom: 0.5rem;
    font-weight: bold;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-links {
        margin-top: 1rem;
    }
}