/* ========================================
   拉克力跨境官网 - 公共样式
   ======================================== */

/* CSS 变量 */
:root {
    --primary: #FF7F24;
    --primary-dark: #E67018;
    --primary-light: #FFE0CC;
    --primary-gradient: linear-gradient(135deg, #FF9E6D 0%, #FF7F24 50%, #E67018 100%);
    --secondary: #1E40AF;
    --secondary-dark: #1A3590;
    --secondary-light: #DBEAFE;
    --accent: #2563EB;
    --gray-50: #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    --gray-500: #6B7280;
    --gray-700: #374151;
    --gray-800: #1F2937;
    --gray-900: #111827;
    --text-dark: #1F2937;
    --text-body: #374151;
    --text-light: #6B7280;
    --white: #FFFFFF;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
    --shadow-md: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
    --shadow-lg: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.1);
    --shadow-xl: 0 25px 50px -12px rgba(0,0,0,0.25);
    --radius-sm: 6px;
    --radius: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    color: var(--text-dark);
    line-height: 1.7;
    background: var(--white);
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
}

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

ul {
    list-style: none;
}

/* 容器 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== 导航栏 ===== */
.header {
    position: sticky;
    top: 0;
    background: rgba(255,255,255,0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 1px 3px rgba(0,0,0,0.06);
    z-index: 1000;
    border-bottom: 1px solid rgba(0,0,0,0.04);
    transition: var(--transition);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 72px;
}

.logo {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 10px;
    transition: var(--transition);
}

.logo:hover {
    transform: translateY(-1px);
}

.logo i {
    font-size: 26px;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-text {
    letter-spacing: -0.5px;
}

.nav-menu {
    display: flex;
    gap: 8px;
    align-items: center;
}

.nav-menu a {
    font-size: 15px;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    position: relative;
    color: var(--text-body);
}

.nav-menu a:hover {
    color: var(--primary);
    background: var(--primary-light);
}

.nav-menu a.active {
    color: var(--primary);
    background: var(--primary-light);
}

.nav-menu .nav-badge-link {
    color: var(--primary);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 6px;
}

.nav-menu .nav-badge-link:hover {
    background: var(--primary-light);
}

.nav-badge {
    background: var(--primary-gradient);
    color: #fff;
    font-size: 10px;
    padding: 2px 8px;
    border-radius: 10px;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.nav-badge.blue {
    background: linear-gradient(135deg, #3B82F6, #2563EB);
}

.consult-btn {
    background: var(--primary-gradient);
    color: #fff;
    padding: 10px 22px;
    border-radius: 50px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 15px;
    font-weight: 600;
    transition: var(--transition);
    box-shadow: 0 2px 8px rgba(255,127,36,0.3);
}

.consult-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(255,127,36,0.4);
}

.hamburger {
    display: none;
    font-size: 22px;
    cursor: pointer;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    background: var(--gray-100);
    align-items: center;
    justify-content: center;
    color: var(--text-dark);
    transition: var(--transition);
}

.hamburger:hover {
    background: var(--primary-light);
    color: var(--primary);
}

/* 移动端菜单 */
.mobile-menu {
    display: none;
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 999;
    padding: 20px;
    flex-direction: column;
    gap: 4px;
    overflow-y: auto;
}

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

.mobile-menu a {
    font-size: 17px;
    font-weight: 500;
    padding: 14px 20px;
    border-radius: var(--radius);
    color: var(--text-dark);
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 10px;
}

.mobile-menu a:hover,
.mobile-menu a.active {
    background: var(--primary-light);
    color: var(--primary);
}

/* ===== 面包屑 ===== */
.breadcrumb {
    padding: 16px 0;
    background: var(--gray-50);
    font-size: 14px;
    border-bottom: 1px solid var(--gray-200);
}

.breadcrumb a {
    color: var(--secondary);
    font-weight: 500;
    transition: var(--transition);
}

.breadcrumb a:hover {
    color: var(--primary);
}

.breadcrumb span {
    margin: 0 8px;
    color: var(--gray-400);
}

/* ===== 通用标题 ===== */
.section-title {
    text-align: center;
    font-size: 36px;
    font-weight: 800;
    margin-bottom: 16px;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, var(--gray-900) 0%, var(--gray-700) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    text-align: center;
    font-size: 17px;
    color: var(--text-light);
    margin-bottom: 60px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.section-divider {
    width: 60px;
    height: 4px;
    background: var(--primary-gradient);
    border-radius: 2px;
    margin: 0 auto 20px;
}

/* ===== 页脚 ===== */
.footer {
    background: linear-gradient(180deg, #1F2937 0%, #111827 100%);
    color: #fff;
    padding: 80px 0 30px;
    position: relative;
    overflow: hidden;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary), transparent);
    opacity: 0.5;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 48px;
    margin-bottom: 48px;
    position: relative;
    z-index: 1;
}

.footer-col h4 {
    font-size: 17px;
    font-weight: 700;
    margin-bottom: 24px;
    position: relative;
    padding-bottom: 12px;
    color: #fff;
}

.footer-col h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 3px;
    background: var(--primary-gradient);
    border-radius: 2px;
}

.footer-col p {
    color: var(--gray-400);
    font-size: 14px;
    line-height: 1.8;
}

.footer-col .contact-info {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.footer-col .contact-info li {
    list-style: none;
    display: flex;
    align-items: flex-start;
    gap: 12px;
    color: var(--gray-400);
    font-size: 14px;
}

.footer-col .contact-info li i {
    margin-top: 3px;
    color: var(--primary);
    font-size: 15px;
    width: 16px;
}

.footer-col .contact-info li a {
    color: var(--gray-400);
    transition: var(--transition);
}

.footer-col .contact-info li a:hover {
    color: var(--primary);
}

.social-icons {
    display: flex;
    gap: 12px;
    margin-top: 20px;
}

.social-icons a {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(255,255,255,0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    transition: var(--transition);
    color: var(--gray-400);
    border: 1px solid rgba(255,255,255,0.06);
}

.social-icons a:hover {
    background: var(--primary-gradient);
    color: #fff;
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(255,127,36,0.3);
    border-color: transparent;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255,255,255,0.08);
    font-size: 13px;
    color: var(--gray-500);
    position: relative;
    z-index: 1;
}

.footer-bottom a {
    color: var(--gray-400);
    transition: var(--transition);
}

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

/* ===== 通用按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-weight: 600;
    border-radius: 50px;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    font-size: 15px;
    padding: 12px 28px;
}

.btn-primary {
    background: var(--primary-gradient);
    color: #fff;
    box-shadow: 0 4px 12px rgba(255,127,36,0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(255,127,36,0.4);
}

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

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

.btn-white {
    background: #fff;
    color: var(--primary);
    box-shadow: var(--shadow);
}

.btn-white:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-lg {
    padding: 16px 36px;
    font-size: 17px;
}

/* ===== 动画 ===== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.fade-in-left {
    opacity: 0;
    transform: translateX(-30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.fade-in-right {
    opacity: 0;
    transform: translateX(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in-right.visible {
    opacity: 1;
    transform: translateX(0);
}

.scale-in {
    opacity: 0;
    transform: scale(0.9);
    transition: opacity 0.5s ease-out, transform 0.5s ease-out;
}

.scale-in.visible {
    opacity: 1;
    transform: scale(1);
}

/* 延迟动画 */
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }
.delay-5 { transition-delay: 0.5s; }

/* ===== 响应式 ===== */
@media (max-width: 768px) {
    .nav-menu,
    .nav .consult-btn {
        display: none;
    }
    .hamburger {
        display: flex;
    }
    .section-title {
        font-size: 28px;
    }
    .section-subtitle {
        font-size: 15px;
        margin-bottom: 40px;
    }
    .container {
        padding: 0 16px;
    }
    .footer {
        padding: 60px 0 20px;
    }
    .footer-content {
        gap: 32px;
    }
}