/* ============================================
   慧营科技 - 阿里巴巴风格样式
   主色：#FF6A00 (橙)
   ============================================ */

/* ===== 基础重置 ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #FF6A00;
    --primary-dark: #E55A00;
    --primary-light: #FFF5EB;
    --primary-hover: #FF8533;
    --text-1: #1A1A1A;
    --text-2: #4D4D4D;
    --text-3: #808080;
    --text-4: #B3B3B3;
    --bg-white: #FFFFFF;
    --bg-gray: #F7F8FA;
    --bg-gray-2: #F0F1F3;
    --border: #E8E8E8;
    --border-light: #F0F0F0;
    --footer-bg: #1A1A2E;
    --footer-text: #B3B3B3;
    --radius: 8px;
    --radius-lg: 12px;
    --shadow-sm: 0 1px 4px 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);
    --transition: 0.3s ease;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 70px;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 15px;
    line-height: 1.7;
    color: var(--text-1);
    background: var(--bg-white);
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

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

/* ===== 通用按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 15px;
    font-weight: 500;
    border-radius: var(--radius);
    cursor: pointer;
    border: none;
    transition: var(--transition);
    white-space: nowrap;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
    padding: 12px 28px;
}
.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(255,106,0,0.3);
}

.btn-ghost {
    background: rgba(255,255,255,0.12);
    color: #fff;
    padding: 12px 28px;
    border: 1px solid rgba(255,255,255,0.4);
    backdrop-filter: blur(4px);
}
.btn-ghost:hover {
    background: rgba(255,255,255,0.22);
    border-color: rgba(255,255,255,0.7);
}

.btn-lg { padding: 14px 36px; font-size: 16px; }
.btn-full { width: 100%; }

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: 64px;
    background: #fff;
    border-bottom: 1px solid var(--border-light);
    z-index: 1000;
    transition: var(--transition);
}
.navbar.scrolled {
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    height: 100%;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 8px;
}
.logo-icon {
    background: var(--primary);
    color: #fff;
    font-size: 18px;
    font-weight: 700;
    padding: 6px 14px;
    border-radius: var(--radius);
    letter-spacing: 1px;
}

.nav-menu {
    display: flex;
    gap: 36px;
    align-items: center;
}
.nav-link {
    font-size: 15px;
    color: var(--text-2);
    font-weight: 400;
    position: relative;
    transition: var(--transition);
    padding: 4px 0;
}
.nav-link:hover, .nav-link.active {
    color: var(--primary);
}
.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0; right: 0;
    height: 2px;
    background: var(--primary);
    border-radius: 1px;
}

.btn-nav-cta {
    background: var(--primary);
    color: #fff;
    padding: 8px 24px;
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
}
.btn-nav-cta:hover {
    background: var(--primary-dark);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}
.hamburger span {
    width: 24px;
    height: 2px;
    background: var(--text-1);
    border-radius: 1px;
    transition: var(--transition);
}
.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

/* ===== Hero ===== */
.hero {
    position: relative;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
    padding: 100px 24px 80px;
}
.hero-bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 40%, #0f3460 100%);
}
.hero-bg::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 20% 50%, rgba(255,106,0,0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 30%, rgba(255,106,0,0.1) 0%, transparent 40%);
}
.hero-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
    background-size: 50px 50px;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
}

.hero-tag {
    display: inline-block;
    background: rgba(255,106,0,0.15);
    border: 1px solid rgba(255,106,0,0.3);
    color: #FFB380;
    padding: 6px 18px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 24px;
}

.hero-title {
    font-size: 46px;
    font-weight: 900;
    color: #fff;
    line-height: 1.3;
    margin-bottom: 20px;
}
.hero-accent {
    background: linear-gradient(135deg, #FF6A00, #FF9933);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-desc {
    font-size: 17px;
    color: rgba(255,255,255,0.7);
    line-height: 1.8;
    margin-bottom: 36px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 56px;
}

.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
}
.stat-item {
    text-align: center;
    padding: 0 28px;
}
.stat-number {
    font-size: 36px;
    font-weight: 700;
    color: #FF8533;
    line-height: 1;
}
.stat-label {
    font-size: 13px;
    color: rgba(255,255,255,0.5);
    margin-top: 8px;
}
.stat-divider {
    width: 1px;
    height: 40px;
    background: rgba(255,255,255,0.15);
}

/* ===== 通用 Section ===== */
.section {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 56px;
}
.section-title {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-1);
    margin-bottom: 12px;
}
.section-subtitle {
    font-size: 16px;
    color: var(--text-3);
}

/* ===== 业务范围 ===== */
.services {
    background: var(--bg-white);
}
.biz-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.biz-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 36px 32px;
    transition: var(--transition);
    position: relative;
}
.biz-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}
.biz-card-featured {
    border-color: var(--primary);
    border-width: 2px;
}
.biz-badge {
    position: absolute;
    top: -12px;
    right: 24px;
    background: var(--primary);
    color: #fff;
    font-size: 12px;
    font-weight: 500;
    padding: 4px 14px;
    border-radius: 12px;
}
.biz-icon-wrap {
    width: 64px;
    height: 64px;
    border-radius: var(--radius);
    background: var(--primary-light);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}
.biz-icon {
    width: 36px;
    height: 36px;
    color: var(--primary);
}
.biz-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-1);
    margin-bottom: 12px;
}
.biz-desc {
    font-size: 14px;
    color: var(--text-3);
    line-height: 1.8;
    margin-bottom: 20px;
}
.biz-features {
    margin-bottom: 20px;
}
.biz-features li {
    font-size: 14px;
    color: var(--text-2);
    padding: 6px 0 6px 24px;
    position: relative;
}
.biz-features li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 12px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--primary);
}
.biz-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.biz-tags span {
    font-size: 12px;
    color: var(--primary);
    background: var(--primary-light);
    padding: 4px 12px;
    border-radius: 4px;
}

/* ===== 数字外贸服务 ===== */
.solutions {
    background: var(--bg-gray);
}
.sol-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}
.sol-card {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    text-align: center;
    transition: var(--transition);
    border: 1px solid transparent;
}
.sol-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--border);
    transform: translateY(-2px);
}
.sol-icon {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
}
.sol-icon svg {
    width: 28px;
    height: 28px;
}
.sol-icon-1 { background: #FFF0E5; color: #FF6A00; }
.sol-icon-2 { background: #E8F5E9; color: #00A670; }
.sol-icon-3 { background: #E3F2FD; color: #2196F3; }
.sol-icon-4 { background: #F3E5F5; color: #9C27B0; }
.sol-icon-5 { background: #FFF3E0; color: #FF9800; }
.sol-icon-6 { background: #E0F7FA; color: #00BCD4; }
.sol-icon-7 { background: #FCE4EC; color: #E91E63; }
.sol-icon-8 { background: #E8EAF6; color: #3F51B5; }

.sol-card h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-1);
    margin-bottom: 8px;
}
.sol-card p {
    font-size: 13px;
    color: var(--text-3);
    line-height: 1.6;
}

/* ===== 核心优势 ===== */
.advantages {
    background: var(--bg-white);
}
.adv-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.adv-card {
    position: relative;
    padding: 36px 32px;
    border-radius: var(--radius-lg);
    background: var(--bg-gray);
    transition: var(--transition);
    overflow: hidden;
}
.adv-card:hover {
    background: #fff;
    box-shadow: var(--shadow-md);
}
.adv-num {
    position: absolute;
    top: 16px;
    right: 24px;
    font-size: 48px;
    font-weight: 900;
    color: var(--border-light);
    line-height: 1;
}
.adv-icon {
    width: 48px;
    height: 48px;
    color: var(--primary);
    margin-bottom: 16px;
}
.adv-icon svg {
    width: 100%;
    height: 100%;
}
.adv-card h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-1);
    margin-bottom: 10px;
}
.adv-card p {
    font-size: 14px;
    color: var(--text-3);
    line-height: 1.8;
}

/* ===== 出口流程 ===== */
.process {
    background: var(--bg-gray);
}
.process-flow {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.process-step {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 32px;
    display: flex;
    gap: 20px;
    align-items: flex-start;
    transition: var(--transition);
}
.process-step:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}
.step-num {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    font-size: 18px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
}
.step-body h4 {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-1);
    margin-bottom: 6px;
}
.step-body p {
    font-size: 14px;
    color: var(--text-3);
    line-height: 1.7;
}

/* ===== 成功案例 ===== */
.cases {
    background: var(--bg-white);
}
.case-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.case-card {
    background: var(--bg-gray);
    border-radius: var(--radius-lg);
    padding: 36px 32px;
    position: relative;
    transition: var(--transition);
}
.case-card:hover {
    background: var(--primary-light);
}
.case-quote {
    font-size: 64px;
    font-weight: 900;
    color: var(--primary);
    opacity: 0.15;
    line-height: 1;
    margin-bottom: -20px;
}
.case-text {
    font-size: 15px;
    color: var(--text-2);
    line-height: 1.8;
    margin-bottom: 24px;
    position: relative;
    z-index: 1;
}
.case-info {
    border-top: 1px solid var(--border);
    padding-top: 16px;
}
.case-company {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-1);
    margin-bottom: 4px;
}
.case-tag {
    font-size: 13px;
    color: var(--primary);
}

/* ===== 联系我们 ===== */
.contact {
    background: var(--bg-gray);
}
.contact-wrap {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 40px;
    background: #fff;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}
.contact-info-side {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    padding: 48px 40px;
}
.contact-info-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    margin-bottom: 32px;
}
.contact-info-item:last-child { margin-bottom: 0; }
.ci-icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    border-radius: var(--radius);
    background: rgba(255,106,0,0.15);
    display: flex;
    align-items: center;
    justify-content: center;
}
.ci-icon svg {
    width: 20px;
    height: 20px;
    color: #FF8533;
}
.contact-info-item h4 {
    font-size: 14px;
    color: rgba(255,255,255,0.5);
    font-weight: 400;
    margin-bottom: 4px;
}
.contact-info-item p {
    font-size: 16px;
    color: #fff;
    font-weight: 500;
}

.contact-form-side {
    padding: 48px 40px;
}
.contact-form h3 {
    font-size: 22px;
    margin-bottom: 4px;
}
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 16px;
}
.form-group {
    margin-bottom: 16px;
}
.form-group label {
    display: block;
    font-size: 13px;
    color: var(--text-2);
    margin-bottom: 6px;
    font-weight: 500;
}
.req { color: var(--primary); }
.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 14px;
    font-family: inherit;
    color: var(--text-1);
    background: var(--bg-gray);
    transition: var(--transition);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    background: #fff;
    box-shadow: 0 0 0 3px rgba(255,106,0,0.1);
}
.form-group textarea { resize: vertical; }
.form-success {
    display: none;
    color: #00A670;
    font-size: 14px;
    text-align: center;
    margin-top: 12px;
}
.form-success.show { display: block; }
.form-privacy {
    font-size: 12px;
    color: var(--text-4);
    text-align: center;
    margin-top: 12px;
}

/* ===== 页脚 ===== */
.footer {
    background: var(--footer-bg);
    color: var(--footer-text);
    padding: 56px 0 0;
}
.footer-top {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-logo {
    font-size: 22px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 16px;
}
.footer-desc {
    font-size: 14px;
    line-height: 1.8;
    max-width: 360px;
}
.footer-col h4 {
    font-size: 15px;
    color: #fff;
    margin-bottom: 16px;
    font-weight: 500;
}
.footer-col ul li {
    margin-bottom: 10px;
}
.footer-col ul li a,
.footer-col ul li {
    font-size: 14px;
    color: var(--footer-text);
    transition: var(--transition);
}
.footer-col ul li a:hover {
    color: var(--primary);
}
.footer-bottom {
    text-align: center;
    padding: 24px 0;
    font-size: 13px;
    color: rgba(255,255,255,0.3);
}

/* ===== 滚动动画 ===== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .sol-grid { grid-template-columns: repeat(2, 1fr); }
    .biz-grid, .adv-grid, .case-grid { grid-template-columns: repeat(2, 1fr); }
    .process-flow { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 64px;
        left: 0; right: 0;
        background: #fff;
        flex-direction: column;
        padding: 20px 24px;
        gap: 0;
        border-bottom: 1px solid var(--border);
        transform: translateY(-150%);
        transition: var(--transition);
        box-shadow: var(--shadow-md);
    }
    .nav-menu.active { transform: translateY(0); }
    .nav-menu li { width: 100%; }
    .nav-link { display: block; padding: 12px 0; border-bottom: 1px solid var(--border-light); }
    .btn-nav-cta { display: none; }
    .hamburger { display: flex; }

    .hero { padding: 90px 20px 60px; min-height: auto; }
    .hero-title { font-size: 30px; }
    .hero-desc { font-size: 15px; }
    .hero-buttons { flex-direction: column; align-items: center; }
    .hero-stats { flex-wrap: wrap; gap: 16px; }
    .stat-divider { display: none; }
    .stat-item { padding: 0 12px; }
    .stat-number { font-size: 28px; }

    .section { padding: 56px 0; }
    .section-title { font-size: 26px; }
    .section-header { margin-bottom: 40px; }

    .biz-grid, .adv-grid, .case-grid, .process-flow, .sol-grid {
        grid-template-columns: 1fr;
    }

    .contact-wrap { grid-template-columns: 1fr; }
    .contact-info-side { padding: 32px 24px; }
    .contact-form-side { padding: 32px 24px; }
    .form-row { grid-template-columns: 1fr; }

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

@media (max-width: 480px) {
    .footer-top { grid-template-columns: 1fr; }
    .hero-title { font-size: 26px; }
}