/* ===== 全局重置与基础样式 ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --primary: #0a2d5e;
    --primary-light: #1a4a8a;
    --accent: #e8a020;
    --accent-light: #f0b830;
    --text: #1a1a2e;
    --text-muted: #6b7280;
    --bg-light: #f4f7fc;
    --white: #ffffff;
    --border: #e5e7eb;
    --shadow: 0 4px 24px rgba(10,45,94,0.10);
    --shadow-lg: 0 8px 40px rgba(10,45,94,0.15);
    --radius: 12px;
    --radius-lg: 20px;
    --transition: 0.3s ease;
    --font: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

html { scroll-behavior: smooth; }
body { font-family: var(--font); color: var(--text); background: var(--white); line-height: 1.7; }
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: 90px 0; }
.bg-light { background: var(--bg-light); }

/* ===== 按钮 ===== */
.btn-primary {
    display: inline-block; background: var(--accent); color: var(--white);
    padding: 10px 24px; border-radius: 6px; font-weight: 500; font-size: 14px;
    transition: var(--transition);
}
.btn-primary:hover { background: var(--accent-light); transform: translateY(-1px); }

.btn-outline {
    display: inline-block; border: 2px solid var(--primary); color: var(--primary);
    padding: 12px 32px; border-radius: 8px; font-weight: 500; font-size: 15px;
    transition: var(--transition);
}
.btn-outline:hover { background: var(--primary); color: var(--white); }

.btn-white {
    display: inline-block; background: var(--white); color: var(--primary);
    padding: 14px 36px; border-radius: 8px; font-weight: 600; font-size: 16px;
    transition: var(--transition);
}
.btn-white:hover { background: var(--accent); color: var(--white); }

/* ===== Section 通用标题 ===== */
.section-header { text-align: center; margin-bottom: 60px; }
.section-tag {
    display: inline-block; color: var(--accent); font-size: 12px; font-weight: 700;
    letter-spacing: 3px; margin-bottom: 12px;
}
.section-title { font-size: 36px; font-weight: 700; color: var(--primary); margin-bottom: 16px; }
.section-desc { font-size: 16px; color: var(--text-muted); max-width: 560px; margin: 0 auto; }
.section-desc-left { font-size: 16px; color: var(--text-muted); margin-bottom: 32px; }

/* ===== 导航栏 ===== */
.header {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    padding: 0; transition: var(--transition);
    background: transparent;
}
.header.scrolled {
    background: var(--white); box-shadow: 0 2px 20px rgba(0,0,0,0.08);
    padding: 0;
}
.header .container {
    display: flex; align-items: center; justify-content: space-between;
    height: 72px;
}
.nav-brand { display: flex; align-items: center; gap: 12px; }
.logo-icon {
    width: 44px; height: 44px; background: var(--accent);
    border-radius: 8px; display: flex; align-items: center; justify-content: center;
    color: var(--white); font-weight: 700; font-size: 16px;
}
.logo-text { display: flex; flex-direction: column; }
.company-name { font-size: 18px; font-weight: 700; color: var(--white); line-height: 1.2; }
.company-sub { font-size: 10px; color: rgba(255,255,255,0.7); letter-spacing: 1px; }
.header.scrolled .company-name { color: var(--primary); }
.header.scrolled .company-sub { color: var(--text-muted); }

.nav-menu { display: flex; gap: 8px; }
.nav-link {
    padding: 8px 16px; border-radius: 6px; font-size: 15px; font-weight: 500;
    color: rgba(255,255,255,0.9); transition: var(--transition);
}
.nav-link:hover, .nav-link.active { color: var(--accent); background: rgba(255,255,255,0.1); }
.header.scrolled .nav-link { color: var(--text); }
.header.scrolled .nav-link:hover, .header.scrolled .nav-link.active { color: var(--primary); background: var(--bg-light); }

.nav-cta { }
.hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; }
.hamburger span { display: block; width: 24px; height: 2px; background: var(--white); border-radius: 2px; transition: var(--transition); }
.header.scrolled .hamburger span { background: var(--primary); }

/* ===== Hero ===== */
.hero {
    position: relative; min-height: 100vh;
    display: flex; align-items: center;
    background: linear-gradient(135deg, #0a2d5e 0%, #1a4a8a 50%, #0d3b6e 100%);
    overflow: hidden;
}
.hero-bg {
    position: absolute; inset: 0;
    background: 
        radial-gradient(ellipse at 20% 50%, rgba(232,160,32,0.15) 0%, transparent 60%),
        radial-gradient(ellipse at 80% 20%, rgba(255,255,255,0.05) 0%, transparent 50%),
        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");
}
.hero-overlay { position: absolute; inset: 0; background: rgba(10,20,50,0.3); }
.hero-content { position: relative; z-index: 2; padding-top: 72px; }
.hero-badge {
    display: inline-block; background: rgba(232,160,32,0.2); border: 1px solid rgba(232,160,32,0.4);
    color: var(--accent-light); padding: 6px 18px; border-radius: 50px;
    font-size: 13px; font-weight: 500; margin-bottom: 28px; letter-spacing: 1px;
}
.hero-title {
    font-size: clamp(42px, 6vw, 72px); font-weight: 800; color: var(--white);
    line-height: 1.15; margin-bottom: 24px;
}
.hero-title .highlight { color: var(--accent); }
.hero-desc {
    font-size: 18px; color: rgba(255,255,255,0.75); line-height: 1.8;
    margin-bottom: 40px; max-width: 600px;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 64px; }
.btn-hero-primary {
    display: inline-block; background: var(--accent); color: var(--white);
    padding: 16px 40px; border-radius: 8px; font-size: 16px; font-weight: 600;
    transition: var(--transition);
}
.btn-hero-primary:hover { background: var(--accent-light); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(232,160,32,0.4); }
.btn-hero-outline {
    display: inline-block; border: 2px solid rgba(255,255,255,0.5); color: var(--white);
    padding: 14px 36px; border-radius: 8px; font-size: 16px; font-weight: 500;
    transition: var(--transition);
}
.btn-hero-outline:hover { border-color: var(--white); background: rgba(255,255,255,0.1); }

.hero-stats { display: flex; align-items: center; gap: 32px; }
.stat-item { display: flex; flex-direction: column; }
.stat-num { font-size: 36px; font-weight: 800; color: var(--white); }
.stat-label { font-size: 13px; color: rgba(255,255,255,0.6); margin-top: 2px; }
.stat-divider { width: 1px; height: 50px; background: rgba(255,255,255,0.2); }

.hero-scroll {
    position: absolute; bottom: 40px; left: 50%; transform: translateX(-50%);
    display: flex; flex-direction: column; align-items: center; gap: 8px;
    color: rgba(255,255,255,0.5); font-size: 12px; z-index: 2;
    animation: bounce 2s infinite;
}
.scroll-arrow {
    width: 20px; height: 20px; border-right: 2px solid rgba(255,255,255,0.4);
    border-bottom: 2px solid rgba(255,255,255,0.4); transform: rotate(45deg);
}
@keyframes bounce { 0%,100%{transform:translateX(-50%) translateY(0)} 50%{transform:translateX(-50%) translateY(8px)} }

/* ===== 服务卡片 ===== */
.services-grid {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin-bottom: 48px;
}
.service-card {
    background: var(--white); border: 1px solid var(--border); border-radius: var(--radius-lg);
    padding: 36px 28px; transition: var(--transition); cursor: default;
}
.service-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-6px); border-color: var(--primary); }
.service-icon {
    width: 56px; height: 56px; border-radius: 14px; margin-bottom: 20px;
    background-size: cover; position: relative;
}
.service-icon::before { content: ''; position: absolute; inset: 0; border-radius: 14px; }
.service-icon.sea { background: linear-gradient(135deg, #0a2d5e, #1a6ba8); }
.service-icon.sea::after { content: '🚢'; position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; font-size: 26px; }
.service-icon.air { background: linear-gradient(135deg, #1a4a8a, #4a90d9); }
.service-icon.air::after { content: '✈️'; position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; font-size: 26px; }
.service-icon.land { background: linear-gradient(135deg, #2d5e2d, #4a8a4a); }
.service-icon.land::after { content: '🚂'; position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; font-size: 26px; }
.service-icon.customs { background: linear-gradient(135deg, #5e2d0a, #8a6a1a); }
.service-icon.customs::after { content: '📋'; position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; font-size: 26px; }

.service-card h3 { font-size: 20px; font-weight: 700; color: var(--primary); margin-bottom: 12px; }
.service-card p { font-size: 14px; color: var(--text-muted); line-height: 1.8; margin-bottom: 20px; }
.service-link { font-size: 14px; color: var(--accent); font-weight: 600; transition: var(--transition); }
.service-link:hover { color: var(--primary); }
.services-more { text-align: center; }

/* ===== 为什么选择我们 ===== */
.why-us-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; }
.advantages { display: flex; flex-direction: column; gap: 24px; }
.advantage-item { display: flex; align-items: flex-start; gap: 16px; }
.adv-icon.check {
    width: 32px; height: 32px; border-radius: 50%; background: var(--accent);
    flex-shrink: 0; margin-top: 4px; position: relative;
}
.adv-icon.check::after {
    content: '✓'; position: absolute; inset: 0; display: flex; align-items: center;
    justify-content: center; color: white; font-weight: 700; font-size: 16px;
}
.advantage-item h4 { font-size: 16px; font-weight: 700; color: var(--primary); margin-bottom: 4px; }
.advantage-item p { font-size: 14px; color: var(--text-muted); }

.why-us-visual { position: relative; height: 400px; }
.visual-card {
    position: absolute; background: var(--white); border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg); padding: 28px; text-align: center;
}
.main-card { left: 50%; top: 50%; transform: translate(-50%, -50%); width: 220px; }
.main-card .vc-icon.globe { font-size: 40px; margin-bottom: 12px; }
.main-card .vc-icon.globe::before { content: '🌍'; font-size: 40px; }
.main-card span { font-weight: 700; color: var(--primary); display: block; margin-bottom: 6px; }
.main-card p { font-size: 13px; color: var(--text-muted); }
.side-card-1 { top: 40px; right: 20px; width: 140px; }
.side-card-2 { bottom: 40px; left: 20px; width: 140px; }
.vc-num { font-size: 32px; font-weight: 800; color: var(--accent); margin-bottom: 6px; }
.visual-card span { font-size: 13px; color: var(--text-muted); font-weight: 500; }

/* ===== 服务流程 ===== */
.process-steps {
    display: flex; align-items: center; justify-content: center; gap: 0; flex-wrap: wrap;
}
.process-step {
    text-align: center; padding: 40px 32px; flex: 1; min-width: 200px;
    background: var(--white); border-radius: var(--radius); position: relative;
}
.process-step:hover { box-shadow: var(--shadow); }
.step-num {
    font-size: 48px; font-weight: 800; color: var(--bg-light); line-height: 1;
    margin-bottom: 16px; position: relative;
}
.process-step:hover .step-num { color: rgba(10,45,94,0.1); }
.process-step h4 { font-size: 18px; font-weight: 700; color: var(--primary); margin-bottom: 10px; }
.process-step p { font-size: 14px; color: var(--text-muted); }
.process-arrow {
    width: 40px; height: 2px; background: var(--border); position: relative; flex-shrink: 0;
}
.process-arrow::after {
    content: ''; position: absolute; right: -1px; top: -5px;
    border: 6px solid transparent; border-left: 8px solid var(--border);
}

/* ===== CTA 横幅 ===== */
.cta-banner {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    padding: 80px 0;
}
.cta-banner .container { display: flex; align-items: center; justify-content: space-between; gap: 40px; flex-wrap: wrap; }
.cta-content h2 { font-size: 32px; font-weight: 800; color: var(--white); margin-bottom: 8px; }
.cta-content p { font-size: 16px; color: rgba(255,255,255,0.7); }
.cta-actions { display: flex; align-items: center; gap: 32px; flex-wrap: wrap; }
.cta-phone { display: flex; align-items: center; gap: 8px; color: rgba(255,255,255,0.85); font-size: 18px; font-weight: 600; }

/* ===== 页脚 ===== */
.footer { background: #0a1628; padding: 64px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 48px; margin-bottom: 48px; }
.footer-brand .footer-logo { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.footer-brand .footer-logo span { font-size: 18px; font-weight: 700; color: var(--white); }
.footer-brand p { font-size: 14px; color: rgba(255,255,255,0.5); line-height: 1.8; }
.footer-social { margin-top: 20px; }
.social-icon { display: inline-block; padding: 6px 14px; background: rgba(255,255,255,0.1); border-radius: 6px; font-size: 13px; color: rgba(255,255,255,0.6); }

.footer-links h5, .footer-contact h5 { font-size: 14px; font-weight: 700; color: var(--white); margin-bottom: 20px; letter-spacing: 1px; }
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a { font-size: 14px; color: rgba(255,255,255,0.5); transition: var(--transition); }
.footer-links a:hover { color: var(--accent); }
.footer-contact p { font-size: 14px; color: rgba(255,255,255,0.5); margin-bottom: 10px; }

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.08); padding: 24px 0;
    display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px;
}
.footer-bottom p { font-size: 13px; color: rgba(255,255,255,0.3); }
.footer-bottom a { color: rgba(255,255,255,0.4); transition: var(--transition); }
.footer-bottom a:hover { color: var(--accent); }

/* ===== 内页通用 Hero ===== */
.page-hero {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    padding: 140px 0 80px; text-align: center; position: relative; overflow: hidden;
}
.page-hero::before {
    content: ''; position: absolute; inset: 0;
    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'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}
.page-hero .container { position: relative; z-index: 1; }
.page-hero h1 { font-size: 48px; font-weight: 800; color: var(--white); margin-bottom: 16px; }
.page-hero p { font-size: 18px; color: rgba(255,255,255,0.7); }
.breadcrumb { display: flex; align-items: center; justify-content: center; gap: 8px; margin-top: 20px; font-size: 14px; color: rgba(255,255,255,0.5); }
.breadcrumb a { color: rgba(255,255,255,0.6); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb-sep { color: rgba(255,255,255,0.3); }

.nav-link.lang-switch {
    border: 1.5px solid rgba(255,255,255,0.5);
    border-radius: 5px;
    padding: 5px 12px;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 1px;
}
.header.scrolled .nav-link.lang-switch {
    border-color: var(--primary);
    color: var(--primary);
}
.nav-link.lang-switch:hover {
    background: var(--accent) !important;
    border-color: var(--accent) !important;
    color: var(--white) !important;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .services-grid { grid-template-columns: repeat(2, 1fr); }
    .why-us-inner { grid-template-columns: 1fr; gap: 48px; }
    .why-us-visual { height: 300px; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
    .section { padding: 64px 0; }
    .section-title { font-size: 28px; }
    .nav-menu { display: none; position: fixed; top: 72px; left: 0; right: 0; background: var(--white); flex-direction: column; padding: 20px; box-shadow: var(--shadow); }
    .nav-menu.open { display: flex; }
    .nav-menu .nav-link { color: var(--text); }
    .nav-cta { display: none; }
    .hamburger { display: flex; }
    .hero-title { font-size: 40px; }
    .hero-desc { font-size: 16px; }
    .hero-stats { gap: 20px; }
    .stat-num { font-size: 28px; }
    .services-grid { grid-template-columns: 1fr; }
    .process-steps { flex-direction: column; }
    .process-arrow { width: 2px; height: 30px; }
    .process-arrow::after { top: auto; bottom: -1px; right: -5px; border: 6px solid transparent; border-top: 8px solid var(--border); border-left-color: transparent; }
    .cta-banner .container { flex-direction: column; text-align: center; }
    .footer-grid { grid-template-columns: 1fr; }
    .footer-bottom { flex-direction: column; align-items: center; text-align: center; }
    .why-us-visual { display: none; }
}
@media (max-width: 480px) {
    .container { padding: 0 16px; }
    .hero-title { font-size: 32px; }
    .hero-actions { flex-direction: column; }
    .btn-hero-primary, .btn-hero-outline { text-align: center; }
}