/* ========== CSS Variables & Reset ========== */
:root {
    --primary: #16a34a;          /* 鲜绿色 */
    --primary-light: #4ade80;   /* 亮绿，用于渐变和浅色区域 */
    --primary-dark: #064e3b;    /* 深绿，用于页脚和深色背景 */
    --accent: #e8741d;           /* 强调色橙色保持不变 */
    --accent-hover: #d06216;
    --accent-light: #fff5ee;
    --white: #ffffff;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    --success: #059669;
    --warning: #f59e0b;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.1), 0 4px 6px rgba(0,0,0,0.05);
    --shadow-xl: 0 20px 25px rgba(0,0,0,0.1), 0 10px 10px rgba(0,0,0,0.04);
    --radius-sm: 6px;
    --radius: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    --max-width: 1200px;
    --header-height: 68px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: var(--header-height); font-size: 16px; -webkit-text-size-adjust: 100%; }
body { font-family: var(--font-sans); line-height: 1.65; color: var(--gray-800); background-color: var(--white); -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; min-width: 320px; }

/* ========== Navigation ========== */
.site-header { position: sticky; top: 0; z-index: 1000; background: var(--white); border-bottom: 1px solid var(--gray-200); box-shadow: var(--shadow-sm); height: var(--header-height); display: flex; align-items: center; }
.header-inner { width: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 20px; display: flex; align-items: center; justify-content: space-between; height: 100%; gap: 16px; }
.logo { display: flex; align-items: center; gap: 10px; text-decoration: none; flex-shrink: 0; }
.logo-icon { width: 42px; height: 42px; background: var(--primary); border-radius: var(--radius); display: flex; align-items: center; justify-content: center; color: var(--white); font-weight: 800; font-size: 1.1rem; letter-spacing: -0.5px; flex-shrink: 0; }
.logo-text { display: flex; flex-direction: column; line-height: 1.15; }
.logo-text .zh { font-weight: 900; font-size: 1.15rem; color: var(--primary); white-space: nowrap; letter-spacing: -0.3px; }
.logo-text .en { font-size: 0.7rem; color: var(--gray-500); font-weight: 800; text-transform: uppercase; letter-spacing: 0.3px; white-space: nowrap; }

.nav-links { display: flex; list-style: none; gap: 6px; align-items: center; flex-wrap: wrap; justify-content: flex-end; }
.nav-links a { text-decoration: none; color: var(--gray-700); font-weight: 800; font-size: 0.9rem; padding: 8px 14px; border-radius: var(--radius-sm); transition: all 0.2s ease; white-space: nowrap; }
.nav-links a:hover, .nav-links a:focus-visible { color: var(--primary); background: var(--gray-100); }
.nav-cta { background: var(--accent) !important; color: var(--white) !important; font-weight: 600 !important; padding: 9px 18px !important; border-radius: var(--radius) !important; transition: all 0.25s ease !important; }
.nav-cta:hover { background: var(--accent-hover) !important; color: var(--white) !important; transform: translateY(-1px); box-shadow: var(--shadow-md); }
.hamburger { display: none; background: none; border: none; cursor: pointer; padding: 8px; color: var(--gray-700); font-size: 1.5rem; line-height: 1; }

.language-switch { display: flex; align-items: center; gap: 4px; margin-left: 8px; flex-shrink: 0; }
.lang-btn { background: none; border: 1px solid var(--gray-300); padding: 5px 10px; font-size: 0.78rem; font-weight: 600; border-radius: 4px; cursor: pointer; color: var(--gray-600); transition: all 0.2s; font-family: var(--font-sans); }
.lang-btn.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.lang-btn:not(.active):hover { background: var(--gray-100); border-color: var(--gray-400); }

/* ========== Hero ========== */
.hero {
    background: linear-gradient(135deg, #064e3b 0%, #16a34a 40%, #4ade80 100%);
    color: var(--white);
    padding: 60px 20px 70px;
    position: relative;
    overflow: hidden;
}
.hero::before { content: ''; position: absolute; top: -80px; right: -120px; width: 450px; height: 450px; border-radius: 50%; background: rgba(255,255,255,0.025); pointer-events: none; }
.hero::after { content: ''; position: absolute; bottom: -60px; left: -80px; width: 300px; height: 300px; border-radius: 50%; background: rgba(255,255,255,0.02); pointer-events: none; }
.hero-inner { max-width: var(--max-width); margin: 0 auto; position: relative; z-index: 1; display: flex; flex-wrap: wrap; align-items: center; gap: 40px; }
.hero-content { flex: 1 1 480px; min-width: 0; }
.hero-badge { display: inline-block; background: rgba(255,255,255,0.15); border: 1px solid rgba(255,255,255,0.25); padding: 6px 14px; border-radius: 20px; font-size: 0.8rem; font-weight: 500; letter-spacing: 0.5px; margin-bottom: 18px; backdrop-filter: blur(4px); }
.hero h1 { font-size: clamp(1.8rem, 4vw, 2.8rem); font-weight: 800; line-height: 1.25; letter-spacing: -0.5px; margin-bottom: 14px; color: #ffffff; }
.hero h1 .highlight { color: #ffb978; display: inline-block; }
.hero-subtitle { font-size: clamp(1rem, 2vw, 1.2rem); color: rgba(255,255,255,0.85); margin-bottom: 28px; line-height: 1.6; max-width: 520px; }
.hero-buttons { display: flex; flex-wrap: wrap; gap: 12px; }
.btn { display: inline-flex; align-items: center; gap: 8px; font-weight: 600; font-size: 0.95rem; padding: 13px 26px; border-radius: var(--radius); text-decoration: none; cursor: pointer; border: none; transition: all 0.25s ease; font-family: var(--font-sans); white-space: nowrap; }
.btn-primary { background: var(--accent); color: var(--white); box-shadow: var(--shadow-lg); }
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-2px); box-shadow: var(--shadow-xl); }
.btn-outline { background: transparent; color: var(--white); border: 2px solid rgba(255,255,255,0.5); }
.btn-outline:hover { background: rgba(255,255,255,0.1); border-color: rgba(255,255,255,0.8); }
.hero-visual { flex: 0 0 300px; display: flex; align-items: center; justify-content: center; }
/* 原 Hero 右侧视觉容器保持不变，仅修改内部 globe 样式 */
.hero-globe {
    width: auto;
    height: auto;
    border-radius: 0;
    background: transparent;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    animation: none; /* 移除脉动动画，可保留也可删除 */
}

.hero-globe i {
    font-size: 22rem;          /* 飞机图标放大，可根据需要调整 */
    color: rgba(255, 255, 255, 0.85);
    filter: drop-shadow(0 10px 15px rgba(0,0,0,0.2));
    transition: transform 0.3s;
}

/* 鼠标悬停时轻微旋转 */
.hero-globe:hover i {
    transform: rotate(10deg);
}

/* 保留两个光点 */
.hero-globe .dot-cn,
.hero-globe .dot-br {
    position: absolute;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    box-shadow: 0 0 12px currentColor;
}
.dot-cn {
    background: #ffb978;
    top: 10%;
    right: 15%;
}
.dot-br {
    background: #4ade80;
    bottom: 10%;
    left: 15%;
}

/* ========== Sections ========== */
.section { padding: 60px 20px; }
.section-inner { max-width: var(--max-width); margin: 0 auto; }
.section-header { text-align: center; margin-bottom: 44px; }
.section-header h2 { font-size: clamp(1.5rem, 3vw, 2rem); font-weight: 700; color: var(--primary); letter-spacing: -0.3px; margin-bottom: 8px; }
.section-header .subtitle { font-size: 1rem; color: var(--gray-500); max-width: 560px; margin: 0 auto; }
.divider { width: 50px; height: 3px; background: var(--accent); border-radius: 3px; margin: 12px auto 0; }

/* Advantages */
.advantages-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 20px; }
.advantage-card { background: var(--white); border: 1px solid var(--gray-200); border-radius: var(--radius-lg); padding: 28px 22px 22px; text-align: center; transition: all 0.3s ease; }
.advantage-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--gray-300); }
.advantage-icon { width: 56px; height: 56px; background: var(--accent-light); border-radius: 50%; display: flex; align-items: center; justify-content: center; margin: 0 auto 16px; font-size: 1.5rem; color: var(--accent); }
.advantage-card h3 { font-size: 1rem; font-weight: 700; color: var(--primary); margin-bottom: 6px; }
.advantage-card p { font-size: 0.85rem; color: var(--gray-500); line-height: 1.5; }

/* Services */
.services-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 24px; }
.service-card { background: var(--white); border: 1px solid var(--gray-200); border-radius: var(--radius-xl); padding: 32px 24px; transition: all 0.3s ease; display: flex; flex-direction: column; gap: 12px; }
.service-card:hover { box-shadow: var(--shadow-xl); border-color: transparent; transform: translateY(-2px); }
.service-card .svc-icon { width: 52px; height: 52px; background: var(--primary); border-radius: var(--radius); display: flex; align-items: center; justify-content: center; color: #fff; font-size: 1.4rem; }
.service-card h3 { font-size: 1.15rem; font-weight: 700; color: var(--primary); }
.service-card p { font-size: 0.9rem; color: var(--gray-600); line-height: 1.6; flex: 1; }
.service-card .svc-tag { display: inline-block; font-size: 0.75rem; font-weight: 600; background: var(--accent-light); color: var(--accent); padding: 4px 10px; border-radius: 14px; align-self: flex-start; }
.service-card .svc-link { font-weight: 600; color: var(--accent); text-decoration: none; font-size: 0.9rem; display: inline-flex; align-items: center; gap: 4px; transition: gap 0.2s; }
.service-card .svc-link:hover { gap: 8px; }

/* News (用于首页和新闻列表) */
.news-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px; margin-top: 10px; }
.news-card { background: var(--white); border: 1px solid var(--gray-200); border-radius: var(--radius-lg); padding: 20px; transition: all 0.3s; display: flex; flex-direction: column; gap: 8px; }
.news-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-2px); }
.news-date { font-size: 0.75rem; color: var(--gray-400); font-weight: 500; }
.news-card h4 { font-size: 1rem; font-weight: 700; color: var(--primary); line-height: 1.4; }
.news-card p { font-size: 0.85rem; color: var(--gray-600); line-height: 1.5; }
.read-more { font-weight: 600; color: var(--accent); text-decoration: none; font-size: 0.85rem; align-self: flex-start; display: inline-flex; align-items: center; gap: 4px; }
.read-more:hover { text-decoration: underline; }

/* Steps */
.bg-light { background: var(--gray-50); }
.steps-container { display: flex; flex-wrap: wrap; gap: 16px; justify-content: center; }
.step-item { flex: 1 1 130px; min-width: 120px; max-width: 160px; text-align: center; position: relative; }
.step-item + .step-item::before { content: ''; position: absolute; top: 30px; left: -18px; width: 36px; height: 2px; background: var(--gray-300); z-index: 0; }
@media (max-width: 768px) { .step-item + .step-item::before { display: none; } }
.step-circle { width: 60px; height: 60px; border-radius: 50%; background: var(--white); border: 3px solid var(--primary); color: var(--primary); font-weight: 700; font-size: 1.2rem; display: flex; align-items: center; justify-content: center; margin: 0 auto 10px; position: relative; z-index: 1; transition: all 0.3s; }
.step-item:hover .step-circle { background: var(--primary); color: #fff; box-shadow: var(--shadow-lg); }
.step-label { font-size: 0.82rem; font-weight: 600; color: var(--gray-700); }
.step-desc { font-size: 0.72rem; color: var(--gray-400); margin-top: 2px; }

/* Network */
.network-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; align-items: start; }
@media (max-width: 768px) { .network-grid { grid-template-columns: 1fr; } }
.network-col { background: var(--white); border: 1px solid var(--gray-200); border-radius: var(--radius-xl); padding: 28px 24px; }
.network-col h3 { font-size: 1.1rem; font-weight: 700; color: var(--primary); margin-bottom: 6px; display: flex; align-items: center; gap: 8px; }
.network-col .flag { font-size: 1.3rem; }
.network-col .subtitle { font-size: 0.8rem; color: var(--gray-400); margin-bottom: 16px; }
.city-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.city-tag { display: inline-block; padding: 6px 14px; background: var(--gray-100); border-radius: 20px; font-size: 0.82rem; font-weight: 500; color: var(--gray-700); transition: all 0.2s; }
.city-tag:hover { background: var(--primary); color: #fff; }
.city-tag.primary-tag { background: var(--primary); color: #fff; font-weight: 600; }

/* Why Us */
.why-us-list { list-style: none; display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px; }
.why-us-list li { display: flex; align-items: flex-start; gap: 12px; padding: 18px; background: var(--white); border-radius: var(--radius); border: 1px solid var(--gray-100); transition: all 0.2s; }
.why-us-list li:hover { border-color: var(--accent); background: var(--accent-light); }
.why-us-list li i { color: var(--accent); font-size: 1.2rem; margin-top: 2px; flex-shrink: 0; }
.why-us-list li strong { display: block; font-size: 0.95rem; color: var(--primary); margin-bottom: 2px; }
.why-us-list li span { font-size: 0.82rem; color: var(--gray-500); }

/* FAQ */
.faq-list { max-width: 780px; margin: 0 auto; display: flex; flex-direction: column; gap: 10px; }
.faq-item { border: 1px solid var(--gray-200); border-radius: var(--radius-lg); overflow: hidden; background: var(--white); transition: all 0.2s; }
.faq-item:hover { border-color: var(--gray-300); }
.faq-item summary { padding: 18px 22px; font-weight: 600; font-size: 0.95rem; color: var(--primary); cursor: pointer; list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 12px; user-select: none; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary .faq-icon { font-size: 0.8rem; transition: transform 0.3s; color: var(--gray-400); flex-shrink: 0; }
.faq-item[open] summary .faq-icon { transform: rotate(180deg); color: var(--accent); }
.faq-answer { padding: 0 22px 18px; font-size: 0.88rem; color: var(--gray-600); line-height: 1.7; }

/* Contact */
.contact-wrapper { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; align-items: start; }
@media (max-width: 768px) { .contact-wrapper { grid-template-columns: 1fr; } }
.contact-info-box { background: var(--primary); color: #fff; border-radius: var(--radius-xl); padding: 32px 24px; display: flex; flex-direction: column; gap: 18px; }
.contact-info-box h3 { font-size: 1.3rem; font-weight: 700; margin-bottom: 4px; }
.contact-info-box p { font-size: 0.9rem; opacity: 0.85; line-height: 1.6; }
.contact-info-item { display: flex; align-items: flex-start; gap: 12px; font-size: 0.9rem; }
.contact-info-item i { margin-top: 3px; flex-shrink: 0; color: #ffb978; }
.contact-form-card { background: var(--white); border: 1px solid var(--gray-200); border-radius: var(--radius-xl); padding: 32px 24px; box-shadow: var(--shadow-md); }
.contact-form-card h3 { font-size: 1.2rem; font-weight: 700; color: var(--primary); margin-bottom: 20px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-bottom: 14px; }
@media (max-width: 500px) { .form-row { grid-template-columns: 1fr; } }
.form-group { display: flex; flex-direction: column; gap: 5px; margin-bottom: 14px; }
.form-group label { font-size: 0.82rem; font-weight: 600; color: var(--gray-700); }
.form-group input, .form-group select, .form-group textarea, .contact-form-card input, .contact-form-card select, .contact-form-card textarea { padding: 11px 14px; border: 1.5px solid var(--gray-300); border-radius: var(--radius); font-size: 0.9rem; font-family: var(--font-sans); transition: all 0.2s; background: var(--gray-50); width: 100%; color: var(--gray-800); }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus, .contact-form-card input:focus, .contact-form-card select:focus, .contact-form-card textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(232,116,29,0.1); background: var(--white); }
.contact-form-card textarea { resize: vertical; min-height: 80px; }
.btn-submit { width: 100%; padding: 14px; font-size: 1rem; font-weight: 700; background: var(--accent); color: #fff; border: none; border-radius: var(--radius); cursor: pointer; transition: all 0.25s; font-family: var(--font-sans); letter-spacing: 0.3px; }
.btn-submit:hover { background: var(--accent-hover); box-shadow: var(--shadow-lg); transform: translateY(-1px); }

/* Footer */
.site-footer { background: var(--primary-dark); color: rgba(255,255,255,0.75); padding: 40px 20px 24px; font-size: 0.85rem; }
.footer-inner { max-width: var(--max-width); margin: 0 auto; display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 28px; }
.footer-col h4 { color: #fff; font-weight: 700; font-size: 0.95rem; margin-bottom: 12px; }
.footer-col p, .footer-col a { color: rgba(255,255,255,0.65); line-height: 1.7; text-decoration: none; font-size: 0.82rem; }
.footer-col a:hover { color: #ffb978; }
.footer-bottom { max-width: var(--max-width); margin: 24px auto 0; padding-top: 18px; border-top: 1px solid rgba(255,255,255,0.12); text-align: center; font-size: 0.78rem; color: rgba(255,255,255,0.45); }
.footer-bottom a { color: rgba(255,255,255,0.5); text-decoration: none; }
.footer-bottom a:hover { color: #ffb978; }

/* Toast */
.toast { position: fixed; top: 24px; left: 50%; transform: translateX(-50%) translateY(-120px); background: var(--success); color: #fff; padding: 14px 28px; border-radius: 30px; font-weight: 600; font-size: 0.95rem; z-index: 9999; box-shadow: var(--shadow-xl); transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275); pointer-events: none; }
.toast.show { transform: translateX(-50%) translateY(0); }

/* News list & detail (additional) */
.news-list .news-item { border-bottom: 1px solid var(--gray-200); padding: 20px 0; }
.news-list .news-item h3 { font-size: 1.2rem; margin-bottom: 6px; }
.news-list .date { color: var(--gray-400); font-size: 0.85rem; margin-bottom: 8px; }
.news-article h1 { font-size: 2rem; color: var(--primary); margin-bottom: 10px; }
.news-article .news-date { color: var(--gray-400); margin-bottom: 20px; }
.news-content { line-height: 1.8; font-size: 1rem; }
.page-link { display: inline-block; padding: 6px 14px; margin: 0 4px; border: 1px solid var(--gray-200); border-radius: var(--radius-sm); text-decoration: none; color: var(--gray-600); }
.page-link.active { background: var(--primary); color: #fff; border-color: var(--primary); }

/* About page */
.about-content p { margin-bottom: 20px; font-size: 1rem; color: var(--gray-700); line-height: 1.8; }

/* ========== Responsive ========== */
@media (max-width: 900px) {
    .nav-links { position: fixed; top: var(--header-height); left: 0; right: 0; background: var(--white); flex-direction: column; padding: 12px 20px 20px; border-bottom: 2px solid var(--gray-200); box-shadow: var(--shadow-lg); gap: 2px; display: none; z-index: 999; }
    .nav-links.open { display: flex; }
    .nav-links a { padding: 12px 16px; width: 100%; border-radius: var(--radius); }
    .hamburger { display: block; }
    .language-switch { position: absolute; top: 16px; right: 70px; z-index: 1001; }
    .hero-visual { flex: 0 0 auto; width: 100%; display: flex; justify-content: center; }
    .hero-globe { width: 160px; height: 160px; }
    .hero-globe i { font-size: 2.5rem; }
    .steps-container { gap: 12px; }
        .hero {
        background: linear-gradient(135deg, #064e3b 0%, #16a34a 40%, #4ade80 100%) !important;
    }
    .hero-globe i {
        font-size: 4.5rem !important;
    }
    .nav-links a {
        font-size: 1rem !important;
        font-weight: 600 !important;
    }
    
        /* 头部容器使用 flex 布局，允许换行 */
    .header-inner {
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        justify-content: space-between;
        position: relative;
    }

    /* Logo 左对齐，不参与右侧排列 */
    .logo {
        order: 0;
        margin-right: auto;          /* 将右侧元素全部推到最右 */
        flex-shrink: 0;
    }

    /* 语言切换按钮靠右，紧挨汉堡按钮 */
    .language-switch {
        position: static !important; /* 取消任何绝对定位 */
        margin-left: 0 !important;
        margin-right: 8px;
        order: 1;
        display: flex;
        align-items: center;
        gap: 4px;
    }

    /* 汉堡按钮紧跟语言切换右侧 */
    .hamburger {
        display: block !important;
        order: 2;
        margin-left: 0;
    }

    /* 导航菜单单独一行 */
    nav {
        order: 3;
        width: 100%;
    }
}
@media (max-width: 480px) {
    .hero { padding: 40px 16px 50px; }
    .hero h1 { font-size: 1.5rem; }
    .hero-buttons { flex-direction: column; }
    .btn { justify-content: center; }
    .section { padding: 40px 16px; }
    .advantages-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
    .advantage-card { padding: 18px 12px 14px; }
    .advantage-icon { width: 40px; height: 40px; font-size: 1.1rem; margin-bottom: 10px; }
    .advantage-card h3 { font-size: 0.85rem; }
    .advantage-card p { font-size: 0.72rem; }
    .services-grid { grid-template-columns: 1fr; }
    .news-grid { grid-template-columns: 1fr; }
}