/* ============================================
   港铧官网 - 全局样式表
   公司：上海港铧信息咨询服务有限公司
   颜色：深蓝#003366、金色#D4AF37、橙色#FF6600
   ============================================ */

/* CSS 变量定义 */
:root {
    /* 品牌色彩 */
    --primary-blue: #003366;
    --primary-gold: #D4AF37;
    --primary-orange: #FF6600;
    --secondary-blue: #004080;
    --light-blue: #e6f0f8;
    --light-gold: #f9f5e8;
    --dark-gray: #333333;
    --medium-gray: #666666;
    --light-gray: #f5f5f5;
    --white: #ffffff;
    --black: #000000;
    
    /* 字体 */
    --font-primary: 'Microsoft YaHei', 'PingFang SC', 'Hiragino Sans GB', sans-serif;
    --font-heading: 'Microsoft YaHei', 'PingFang SC', sans-serif;
    
    /* 间距 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    --spacing-xxl: 6rem;
    
    /* 圆角 */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 20px;
    
    /* 阴影 */
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.15);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.2);
    
    /* 过渡 */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* 重置样式 */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    color: var(--dark-gray);
    line-height: 1.6;
    background-color: var(--white);
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-normal);
}

ul, ol {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

button {
    cursor: pointer;
    border: none;
    background: none;
    font-family: inherit;
}

/* 容器 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

.container-fluid {
    width: 100%;
    padding: 0 var(--spacing-sm);
}

/* ============================================
   导航栏样式
   ============================================ */
.navbar {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-md);
}

.navbar-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.navbar-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.navbar-logo a {
    color: var(--white);
    font-size: 1.5rem;
    font-weight: bold;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.navbar-logo .logo-icon {
    width: 40px;
    height: 40px;
    background: var(--primary-gold);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-blue);
    font-weight: bold;
    font-size: 1.2rem;
}

.navbar-menu {
    display: flex;
    align-items: center;
    gap: 0;
}

.navbar-item {
    position: relative;
}

.navbar-link {
    display: block;
    padding: 0 var(--spacing-sm);
    color: var(--white);
    font-size: 0.95rem;
    font-weight: 500;
    line-height: 70px;
    transition: var(--transition-normal);
    position: relative;
}

.navbar-link:hover,
.navbar-link.active {
    color: var(--primary-gold);
    background: rgba(255,255,255,0.1);
}

.navbar-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 3px;
    background: var(--primary-gold);
    transition: var(--transition-normal);
    transform: translateX(-50%);
}

.navbar-link:hover::after,
.navbar-link.active::after {
    width: 80%;
}

/* 下拉菜单 */
.dropdown {
    position: relative;
}

.dropdown-toggle::after {
    content: '▼';
    font-size: 0.6rem;
    margin-left: 5px;
    vertical-align: middle;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--white);
    min-width: 200px;
    box-shadow: var(--shadow-lg);
    border-radius: var(--radius-md);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition-normal);
    overflow: hidden;
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: block;
    padding: 12px 20px;
    color: var(--dark-gray);
    font-size: 0.9rem;
    border-bottom: 1px solid var(--light-gray);
    transition: var(--transition-fast);
}

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

.dropdown-item:hover {
    background: var(--light-blue);
    color: var(--primary-blue);
    padding-left: 25px;
}

.dropdown-item.active {
    background: var(--light-blue);
    color: var(--primary-blue);
    font-weight: 600;
}

/* 汉堡菜单按钮 */
.navbar-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 10px;
    cursor: pointer;
}

.navbar-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background: var(--white);
    transition: var(--transition-normal);
    border-radius: 2px;
}

/* ============================================
   按钮样式
   ============================================ */
.btn {
    display: inline-block;
    padding: 12px 30px;
    font-size: 1rem;
    font-weight: 600;
    text-align: center;
    border-radius: var(--radius-md);
    transition: var(--transition-normal);
    cursor: pointer;
    border: 2px solid transparent;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-gold) 0%, #c9a227 100%);
    color: var(--primary-blue);
    border-color: var(--primary-gold);
}

.btn-primary:hover {
    background: transparent;
    color: var(--primary-gold);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--primary-blue);
    color: var(--white);
    border-color: var(--primary-blue);
}

.btn-secondary:hover {
    background: transparent;
    color: var(--primary-blue);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: var(--primary-gold);
    border-color: var(--primary-gold);
}

.btn-outline:hover {
    background: var(--primary-gold);
    color: var(--primary-blue);
    transform: translateY(-2px);
}

.btn-orange {
    background: linear-gradient(135deg, var(--primary-orange) 0%, #e55a00 100%);
    color: var(--white);
    border-color: var(--primary-orange);
}

.btn-orange:hover {
    background: transparent;
    color: var(--primary-orange);
    transform: translateY(-2px);
}

.btn-lg {
    padding: 15px 40px;
    font-size: 1.1rem;
}

.btn-sm {
    padding: 8px 20px;
    font-size: 0.9rem;
}

/* ============================================
   卡片样式
   ============================================ */
.card {
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    transition: var(--transition-normal);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.card-image {
    width: 100%;
    height: 200px;
    background: linear-gradient(135deg, var(--light-blue) 0%, var(--light-gold) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: var(--primary-blue);
}

.card-body {
    padding: var(--spacing-md);
}

.card-title {
    font-size: 1.3rem;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
}

.card-text {
    color: var(--medium-gray);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* 特色卡片 */
.feature-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
    border-top: 4px solid var(--primary-gold);
}

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

.feature-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--light-blue) 0%, var(--light-gold) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
    font-size: 2rem;
    color: var(--primary-blue);
}

.feature-title {
    font-size: 1.2rem;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
}

.feature-desc {
    color: var(--medium-gray);
    font-size: 0.9rem;
}

/* ============================================
   页面通用样式
   ============================================ */
.section {
    padding: var(--spacing-xxl) 0;
}

.section-sm {
    padding: var(--spacing-xl) 0;
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-title h2 {
    font-size: 2.2rem;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-xs);
    font-weight: 700;
}

.section-title .subtitle {
    color: var(--primary-gold);
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: var(--spacing-xs);
    display: block;
}

.section-title p {
    color: var(--medium-gray);
    max-width: 600px;
    margin: 0 auto;
}

.section-title .divider {
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-gold) 0%, var(--primary-orange) 100%);
    margin: var(--spacing-sm) auto;
    border-radius: 2px;
}

/* 背景色 */
.bg-primary {
    background: var(--primary-blue);
    color: var(--white);
}

.bg-light {
    background: var(--light-gray);
}

.bg-gradient {
    background: linear-gradient(135deg, var(--light-blue) 0%, var(--light-gold) 100%);
}

/* ============================================
   Banner 样式
   ============================================ */
.banner {
    position: relative;
    height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--white);
    overflow: hidden;
}

.banner-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 50%, #001a33 100%);
}

.banner-bg::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.banner-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    padding: 0 var(--spacing-md);
}

.banner-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.banner-title span {
    color: var(--primary-gold);
}

.banner-subtitle {
    font-size: 1.3rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.9;
}

.banner-buttons {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}

/* 页面标题横幅 */
.page-banner {
    position: relative;
    height: 350px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--white);
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
}

.page-banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

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

.page-banner h1 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-xs);
}

.page-banner p {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* ============================================
   网格布局
   ============================================ */
.row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 -15px;
}

.col {
    flex: 1;
    padding: 0 15px;
}

.col-3 {
    flex: 0 0 25%;
    max-width: 25%;
    padding: 0 15px;
}

.col-4 {
    flex: 0 0 33.333%;
    max-width: 33.333%;
    padding: 0 15px;
}

.col-6 {
    flex: 0 0 50%;
    max-width: 50%;
    padding: 0 15px;
}

.col-8 {
    flex: 0 0 66.667%;
    max-width: 66.667%;
    padding: 0 15px;
}

.col-12 {
    flex: 0 0 100%;
    max-width: 100%;
    padding: 0 15px;
}

/* ============================================
   Footer 样式
   ============================================ */
.footer {
    background: linear-gradient(135deg, #001a33 0%, var(--primary-blue) 100%);
    color: var(--white);
    padding-top: var(--spacing-xxl);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.footer-section h3 {
    color: var(--primary-gold);
    font-size: 1.2rem;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-xs);
    border-bottom: 2px solid var(--primary-gold);
    display: inline-block;
}

.footer-section p,
.footer-section a {
    color: rgba(255,255,255,0.8);
    font-size: 0.95rem;
    line-height: 1.8;
}

.footer-section a:hover {
    color: var(--primary-gold);
}

.footer-section ul li {
    margin-bottom: 10px;
}

.footer-section ul li a {
    display: flex;
    align-items: center;
    gap: 8px;
}

.footer-section ul li a::before {
    content: '>';
    color: var(--primary-gold);
    font-size: 0.8rem;
}

.footer-contact-item {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 15px;
}

.footer-contact-item .icon {
    color: var(--primary-gold);
    font-size: 1.1rem;
    margin-top: 3px;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding: var(--spacing-md) 0;
    text-align: center;
}

.footer-bottom p {
    color: rgba(255,255,255,0.6);
    font-size: 0.9rem;
}

.footer-bottom a {
    color: var(--primary-gold);
}

/* ============================================
   联系信息样式
   ============================================ */
.contact-info-box {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-md);
}

.contact-info-item {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--light-gray);
}

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

.contact-info-item .icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--light-blue) 0%, var(--light-gold) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-blue);
    font-size: 1.3rem;
    flex-shrink: 0;
}

.contact-info-item .content h4 {
    color: var(--primary-blue);
    font-size: 1rem;
    margin-bottom: 5px;
}

.contact-info-item .content p {
    color: var(--medium-gray);
    font-size: 0.95rem;
}

/* ============================================
   表单样式
   ============================================ */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-label {
    display: block;
    margin-bottom: 8px;
    color: var(--dark-gray);
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e0e0e0;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition-normal);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(0,51,102,0.1);
}

.form-control::placeholder {
    color: #aaa;
}

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

/* ============================================
   列表样式
   ============================================ */
.list-check {
    list-style: none;
}

.list-check li {
    position: relative;
    padding-left: 30px;
    margin-bottom: 12px;
    color: var(--medium-gray);
}

.list-check li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-gold);
    font-weight: bold;
    font-size: 1.1rem;
}

/* ============================================
   步骤/流程样式
   ============================================ */
.process-steps {
    display: flex;
    justify-content: space-between;
    position: relative;
    margin: var(--spacing-xl) 0;
}

.process-steps::before {
    content: '';
    position: absolute;
    top: 40px;
    left: 10%;
    right: 10%;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-gold) 0%, var(--primary-orange) 100%);
}

.process-step {
    text-align: center;
    position: relative;
    z-index: 1;
    flex: 1;
}

.process-step .step-number {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
    color: var(--white);
    font-size: 1.8rem;
    font-weight: bold;
    border: 4px solid var(--white);
    box-shadow: var(--shadow-md);
}

.process-step .step-title {
    font-size: 1.1rem;
    color: var(--primary-blue);
    font-weight: 600;
    margin-bottom: 8px;
}

.process-step .step-desc {
    font-size: 0.9rem;
    color: var(--medium-gray);
    max-width: 200px;
    margin: 0 auto;
}

/* ============================================
   CTA 区域
   ============================================ */
.cta-section {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    padding: var(--spacing-xxl) 0;
    text-align: center;
    color: var(--white);
}

.cta-section h2 {
    font-size: 2.2rem;
    margin-bottom: var(--spacing-md);
}

.cta-section p {
    font-size: 1.1rem;
    opacity: 0.9;
    margin-bottom: var(--spacing-lg);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* ============================================
   响应式设计
   ============================================ */
@media (max-width: 1024px) {
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .process-steps {
        flex-wrap: wrap;
    }
    
    .process-steps::before {
        display: none;
    }
    
    .process-step {
        flex: 0 0 50%;
        margin-bottom: var(--spacing-lg);
    }
}

@media (max-width: 768px) {
    /* 导航栏移动端 */
    .navbar-toggle {
        display: flex;
    }
    
    .navbar-menu {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        background: var(--primary-blue);
        flex-direction: column;
        align-items: stretch;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
    }
    
    .navbar-menu.active {
        max-height: calc(100vh - 70px);
        overflow-y: auto;
    }
    
    .navbar-item {
        border-bottom: 1px solid rgba(255,255,255,0.1);
    }
    
    .navbar-link {
        line-height: 50px;
        padding: 0 var(--spacing-md);
    }
    
    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        background: rgba(0,0,0,0.2);
        display: none;
    }
    
    .dropdown.active .dropdown-menu {
        display: block;
    }
    
    .dropdown-item {
        color: var(--white);
        border-bottom: 1px solid rgba(255,255,255,0.1);
        padding-left: 40px;
    }
    
    .dropdown-item:hover {
        background: rgba(255,255,255,0.1);
        color: var(--primary-gold);
    }
    
    /* 网格移动端 */
    .col-3,
    .col-4,
    .col-6,
    .col-8 {
        flex: 0 0 100%;
        max-width: 100%;
    }
    
    /* Banner 移动端 */
    .banner {
        height: 500px;
    }
    
    .banner-title {
        font-size: 2rem;
    }
    
    .banner-subtitle {
        font-size: 1.1rem;
    }
    
    .page-banner {
        height: 280px;
    }
    
    .page-banner h1 {
        font-size: 1.8rem;
    }
    
    /* 标题移动端 */
    .section-title h2 {
        font-size: 1.8rem;
    }
    
    /* Footer 移动端 */
    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    /* 流程步骤移动端 */
    .process-step {
        flex: 0 0 100%;
    }
    
    /* CTA 移动端 */
    .cta-section h2 {
        font-size: 1.6rem;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }
    
    .banner {
        height: 450px;
    }
    
    .banner-title {
        font-size: 1.6rem;
    }
    
    .section {
        padding: var(--spacing-xl) 0;
    }
    
    .btn {
        padding: 10px 20px;
        font-size: 0.9rem;
    }
    
    .btn-lg {
        padding: 12px 25px;
        font-size: 1rem;
    }
}

/* ============================================
   工具类
   ============================================ */
.text-center {
    text-align: center;
}

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

.text-right {
    text-align: right;
}

.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }

.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }

.p-1 { padding: var(--spacing-xs); }
.p-2 { padding: var(--spacing-sm); }
.p-3 { padding: var(--spacing-md); }
.p-4 { padding: var(--spacing-lg); }
.p-5 { padding: var(--spacing-xl); }

.d-flex {
    display: flex;
}

.flex-wrap {
    flex-wrap: wrap;
}

.justify-content-center {
    justify-content: center;
}

.justify-content-between {
    justify-content: space-between;
}

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

.gap-1 { gap: var(--spacing-xs); }
.gap-2 { gap: var(--spacing-sm); }
.gap-3 { gap: var(--spacing-md); }

.w-100 {
    width: 100%;
}

.h-100 {
    height: 100%;
}

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

.fade-in-up {
    animation: fadeInUp 0.6s ease forwards;
}

/* 延迟类 */
.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }