/* =============================================
   基础重置
   ============================================= */
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif; color: #2d3748; line-height: 1.6; background: #f8fafc; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* =============================================
   顶部导航（固定悬浮）
   ============================================= */
.header { 
    background: rgba(10, 58, 106, 0.92); 
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    color: #fff; 
    padding: 10px 0; 
    position: sticky; 
    top: 0; 
    z-index: 1000; 
    border-bottom: 1px solid rgba(255,255,255,0.06);
    transition: all 0.3s ease;
}
.header .container { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; }
.logo a { display: flex; align-items: center; gap: 10px; color: #fff; text-decoration: none; font-size: 18px; font-weight: 700; letter-spacing: 0.5px; }
.logo img { height: 36px; }
.header-right { display: flex; align-items: center; gap: 20px; flex-wrap: wrap; }

/* 头部右侧操作按钮 */
.header-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

/* 电话链接 */
.phone-link { 
    text-decoration: none; 
    color: #f6e05e; 
    font-size: 14px; 
    font-weight: 600; 
    background: rgba(255,255,255,0.08); 
    padding: 6px 16px; 
    border-radius: 24px;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    white-space: nowrap;
}
.phone-link:hover { 
    background: rgba(255,255,255,0.15); 
    transform: scale(1.03);
}

/* 立即预约按钮（黄色） */
.btn-call {
    display: inline-block;
    background: #ffd700;
    color: #0a3a6a;
    padding: 6px 20px;
    border-radius: 24px;
    text-decoration: none;
    font-weight: 700;
    font-size: 14px;
    transition: all 0.3s ease;
    white-space: nowrap;
    box-shadow: 0 2px 12px rgba(255,215,0,0.25);
}
.btn-call:hover {
    background: #f5c800;
    transform: scale(1.04);
    box-shadow: 0 4px 20px rgba(255,215,0,0.35);
}

/* 导航菜单 */
.nav-menu { 
    display: flex; 
    gap: 2px; 
    background: rgba(255,255,255,0.06); 
    padding: 4px; 
    border-radius: 30px; 
    border: 1px solid rgba(255,255,255,0.04); 
}
.nav-link { 
    display: inline-block; 
    padding: 6px 18px; 
    border-radius: 24px; 
    font-size: 14px; 
    font-weight: 500; 
    color: rgba(255,255,255,0.75); 
    background: transparent; 
    text-decoration: none; 
    transition: all 0.3s ease; 
    white-space: nowrap; 
}
.nav-link:hover { color: #fff; background: rgba(255,255,255,0.08); }
.nav-link.active { color: #0a3a6a; background: #fff; box-shadow: 0 4px 16px rgba(0,0,0,0.10); }
.nav-link.active:hover { color: #0a3a6a; background: #fff; }

/* =============================================
   Banner
   ============================================= */
.banner { background: linear-gradient(135deg, #0a3a6a 0%, #1a6a9a 60%, #2d8fc5 100%); color: #fff; padding: 80px 0; text-align: center; position: relative; overflow: hidden; }
.banner::before { content: ''; position: absolute; top: -50%; right: -20%; width: 600px; height: 600px; background: rgba(255,255,255,0.03); border-radius: 50%; }
.banner h1 { font-size: 42px; font-weight: 800; margin-bottom: 12px; letter-spacing: 1px; }
.banner p { font-size: 18px; opacity: 0.9; margin-bottom: 24px; }
.banner-info { display: flex; justify-content: center; gap: 32px; flex-wrap: wrap; margin-bottom: 28px; font-size: 15px; }
.banner-info span { background: rgba(255,255,255,0.10); backdrop-filter: blur(8px); padding: 8px 20px; border-radius: 30px; border: 1px solid rgba(255,255,255,0.08); }
.btn-primary { 
    display: inline-block; 
    background: #ffd700; 
    color: #e53e3e; 
    padding: 14px 52px; 
    border-radius: 50px; 
    text-decoration: none; 
    font-weight: 900;
    font-size: 18px;
    transition: all 0.3s; 
    border: none; 
    cursor: pointer; 
    box-shadow: 0 8px 32px rgba(255,215,0,0.30), 0 2px 8px rgba(229,62,62,0.20);
    text-shadow: 0 1px 4px rgba(229,62,62,0.15);
    letter-spacing: 0.5px;
}
.btn-primary:hover { 
    background: #f5c800; 
    transform: translateY(-2px) scale(1.02); 
    box-shadow: 0 12px 40px rgba(255,215,0,0.40), 0 4px 12px rgba(229,62,62,0.25); 
}

/* =============================================
   通用标题
   ============================================= */
.section-title { text-align: center; font-size: 30px; font-weight: 700; margin: 40px 0 8px; color: #0a3a6a; letter-spacing: 0.5px; }
.section-title::after { content: ''; display: block; width: 50px; height: 4px; background: linear-gradient(90deg, #ffd700, #f6ad55); margin: 10px auto 0; border-radius: 4px; }
.section-subtitle { text-align: center; color: #a0aec0; margin-bottom: 28px; font-size: 15px; font-weight: 400; letter-spacing: 1px; }

/* =============================================
   关于我们
   ============================================= */
.about { padding: 20px 0 50px; background: #fff; }
.about-content { max-width: 820px; margin: 0 auto; text-align: center; }
.about-content p { margin-bottom: 12px; font-size: 15px; color: #4a5568; line-height: 1.9; }
.about-stats { display: flex; justify-content: center; gap: 60px; margin-top: 30px; flex-wrap: wrap; }
.about-stats div { text-align: center; }
.about-stats strong { display: block; font-size: 34px; font-weight: 800; color: #0a3a6a; background: linear-gradient(135deg, #0a3a6a, #2d8fc5); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.about-stats span { color: #a0aec0; font-size: 14px; font-weight: 500; }

/* =============================================
   服务项目
   ============================================= */
.service { padding: 20px 0 50px; background: #f8fafc; }
.service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 10px; }
.service-item { background: #fff; padding: 30px 24px; border-radius: 16px; text-align: center; transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94); border: 1px solid rgba(0,0,0,0.04); position: relative; overflow: hidden; }
.service-item::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: linear-gradient(90deg, #ffd700, #f6ad55); opacity: 0; transition: opacity 0.3s; }
.service-item:hover { transform: translateY(-8px); box-shadow: 0 20px 60px rgba(10,58,106,0.08); border-color: rgba(10,58,106,0.06); }
.service-item:hover::before { opacity: 1; }
.service-icon { font-size: 44px; display: block; margin-bottom: 12px; }
.service-item h3 { color: #0a3a6a; font-size: 17px; font-weight: 700; margin-bottom: 6px; }
.service-item p { color: #718096; font-size: 13px; line-height: 1.7; margin-bottom: 10px; }
.service-tag { font-size: 12px; color: #0a3a6a; font-weight: 600; opacity: 0.6; transition: opacity 0.3s; }
.service-item:hover .service-tag { opacity: 1; }

/* =============================================
   车队展示
   ============================================= */
.fleet { padding: 20px 0 50px; background: #fff; }
.fleet-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin-top: 10px; }
.fleet-item { background: #fff; border-radius: 16px; overflow: hidden; box-shadow: 0 2px 16px rgba(0,0,0,0.04); transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94); border: 1px solid #f0f2f5; }
.fleet-item:hover { transform: translateY(-8px); box-shadow: 0 24px 64px rgba(10,58,106,0.08); border-color: rgba(10,58,106,0.06); }
.fleet-image { height: 170px; background: linear-gradient(135deg, #edf2f7, #e2e8f0); display: flex; align-items: center; justify-content: center; overflow: hidden; }
.fleet-image img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.fleet-item:hover .fleet-image img { transform: scale(1.04); }
.fleet-emoji { font-size: 52px; opacity: 0.3; }
.fleet-placeholder-text { font-size: 12px; color: #a0aec0; display: block; text-align: center; }
.fleet-info { padding: 18px 20px 20px; }
.fleet-info h3 { color: #0a3a6a; font-size: 16px; font-weight: 700; margin-bottom: 4px; }
.fleet-info p { color: #718096; font-size: 13px; line-height: 1.6; margin-bottom: 12px; min-height: 36px; }
.fleet-footer .badge { display: inline-block; background: #e8f5e9; color: #2e7d32; padding: 4px 16px; border-radius: 20px; font-size: 11px; font-weight: 600; }

/* =============================================
   站点服务（18地市）
   ============================================= */
.city-service {
    padding: 20px 0 50px;
    background: #f8fafc;
}
.city-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 16px;
    margin-top: 10px;
}
.city-item {
    background: #fff;
    padding: 18px 14px;
    border-radius: 12px;
    text-align: center;
    border: 1px solid #f0f2f5;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0,0,0,0.02);
}
.city-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(10,58,106,0.08);
    border-color: #0a3a6a;
}
.city-icon {
    font-size: 28px;
    display: block;
    margin-bottom: 4px;
}
.city-item h3 {
    color: #0a3a6a;
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 2px;
}
.city-item p {
    color: #888;
    font-size: 12px;
    line-height: 1.4;
    margin: 4px 0 8px;
    min-height: 32px;
}
.city-phone {
    display: inline-block;
    color: #0a3a6a;
    text-decoration: none;
    font-size: 12px;
    font-weight: 600;
    background: rgba(10,58,106,0.06);
    padding: 3px 14px;
    border-radius: 20px;
    transition: all 0.3s ease;
}
.city-phone:hover {
    background: #0a3a6a;
    color: #fff;
}

/* =============================================
   优势保障
   ============================================= */
.advantage { padding: 20px 0 50px; background: #fff; }
.advantage-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin-top: 10px; }
.advantage-item { background: #f8fafc; padding: 30px 20px; border-radius: 16px; text-align: center; transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94); border: 1px solid #f0f2f5; }
.advantage-item:hover { transform: translateY(-6px); box-shadow: 0 20px 60px rgba(10,58,106,0.06); border-color: #0a3a6a; }
.advantage-icon { font-size: 38px; display: block; margin-bottom: 10px; }
.advantage-item h3 { color: #0a3a6a; font-size: 16px; font-weight: 700; margin-bottom: 4px; }
.advantage-item p { color: #718096; font-size: 13px; line-height: 1.7; }

/* =============================================
   知识库
   ============================================= */
.knowledge { padding: 20px 0 50px; background: #f8fafc; }
.knowledge-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 10px;
}
.more-btn {
    display: inline-block;
    background: transparent;
    color: #0a3a6a;
    padding: 6px 20px;
    border: 2px solid #0a3a6a;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
    transition: all 0.3s;
    white-space: nowrap;
}
.more-btn:hover {
    background: #0a3a6a;
    color: #fff;
}
.knowledge-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 10px; }
.knowledge-card { background: #fff; border-radius: 16px; padding: 0; box-shadow: 0 2px 12px rgba(0,0,0,0.03); text-decoration: none; color: #333; transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94); border: 1px solid #f0f2f5; overflow: hidden; display: block; }
.knowledge-card:hover { transform: translateY(-6px); box-shadow: 0 24px 64px rgba(10,58,106,0.06); border-color: #0a3a6a; }
.knowledge-card-body { padding: 22px 24px; }
.knowledge-tag { display: inline-block; background: #ffd700; color: #0a3a6a; font-size: 10px; font-weight: 700; padding: 2px 14px; border-radius: 20px; margin-bottom: 8px; text-transform: uppercase; letter-spacing: 0.5px; }
.knowledge-card-body h3 { font-size: 17px; font-weight: 600; color: #0a3a6a; margin-bottom: 6px; line-height: 1.4; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.knowledge-card-body p { font-size: 14px; color: #888; margin-bottom: 12px; line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.knowledge-meta { display: flex; justify-content: space-between; font-size: 12px; color: #bbb; border-top: 1px solid #f0f2f5; padding-top: 10px; }

/* =============================================
   知识库独立页面
   ============================================= */
.knowledge-page {
    padding: 30px 0 50px;
    background: #f8fafc;
    min-height: 60vh;
}
.page-title {
    text-align: center;
    font-size: 32px;
    font-weight: 700;
    color: #0a3a6a;
    margin-bottom: 4px;
}
.page-subtitle {
    text-align: center;
    color: #a0aec0;
    font-size: 16px;
    margin-bottom: 30px;
}
.btn-back-home {
    display: inline-block;
    background: #0a3a6a;
    color: #fff;
    padding: 10px 40px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
}
.btn-back-home:hover {
    background: #0e4d8a;
    transform: translateY(-2px);
}

/* =============================================
   用户评价（自动滚动）
   ============================================= */
.testimonials {
    padding: 30px 0 50px;
    background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
    overflow: hidden;
}
.testimonials-wrapper {
    position: relative;
    overflow: hidden;
    padding: 10px 0;
}
.testimonials-track {
    display: flex;
    gap: 24px;
    animation: scrollTestimonials 50s linear infinite;
    width: max-content;
}
.testimonials-track:hover {
    animation-play-state: paused;
}
@keyframes scrollTestimonials {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}
.testimonial-card {
    flex: 0 0 300px;
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: 16px;
    padding: 24px 22px;
    border: 1px solid rgba(255, 255, 255, 0.6);
    box-shadow: 0 4px 20px rgba(10, 58, 106, 0.04);
    transition: all 0.4s ease;
}
.testimonial-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(10, 58, 106, 0.08);
    background: rgba(255, 255, 255, 0.9);
}
.testimonial-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 10px;
}
.testimonial-icon { font-size: 28px; }
.testimonial-name { font-weight: 600; color: #0a3a6a; font-size: 15px; }
.testimonial-stars { color: #f6ad55; font-size: 14px; letter-spacing: 2px; }
.testimonial-body p {
    color: #4a5568;
    font-size: 14px;
    line-height: 1.8;
    margin-bottom: 10px;
    font-style: italic;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.testimonial-body p::before { content: '"'; color: #ffd700; font-size: 20px; font-weight: 700; }
.testimonial-body p::after { content: '"'; color: #ffd700; font-size: 20px; font-weight: 700; }
.testimonial-footer {
    display: flex;
    justify-content: space-between;
    font-size: 11px;
    color: #a0aec0;
    border-top: 1px solid rgba(0,0,0,0.04);
    padding-top: 10px;
}
.testimonial-empty {
    text-align: center;
    padding: 40px;
    color: #a0aec0;
    width: 100%;
    font-size: 15px;
}

/* =============================================
   在线留言
   ============================================= */
.contact { padding: 20px 0 50px; background: #f8fafc; }
.contact-form { max-width: 520px; margin: 0 auto; background: #fff; padding: 36px 40px; border-radius: 16px; box-shadow: 0 4px 24px rgba(0,0,0,0.04); border: 1px solid rgba(0,0,0,0.04); }
.form-group { margin-bottom: 14px; }
.form-group label { display: block; font-weight: 600; margin-bottom: 4px; font-size: 13px; color: #4a5568; }
.form-group .required { color: #e53e3e; }
.form-group input, .form-group textarea { width: 100%; padding: 10px 16px; border: 2px solid #edf2f7; border-radius: 10px; font-size: 14px; transition: all 0.3s; font-family: inherit; background: #f7fafc; }
.form-group input:focus, .form-group textarea:focus { border-color: #0a3a6a; outline: none; background: #fff; box-shadow: 0 0 0 4px rgba(10,58,106,0.04); }
.btn-submit { width: 100%; padding: 14px; background: #0a3a6a; color: #fff; border: none; border-radius: 10px; font-size: 16px; font-weight: 700; cursor: pointer; transition: all 0.3s; }
.btn-submit:hover { background: #0e4d8a; transform: translateY(-1px); box-shadow: 0 8px 24px rgba(10,58,106,0.15); }
.btn-submit:disabled { background: #a0aec0; cursor: not-allowed; transform: none; box-shadow: none; }
.form-msg { margin-top: 12px; text-align: center; font-size: 14px; }
.form-msg .success { color: #38a169; }
.form-msg .error { color: #e53e3e; }

/* =============================================
   底部
   ============================================= */
.footer { background: #0a3a6a; color: rgba(255,255,255,0.6); padding: 28px 0 16px; text-align: center; font-size: 14px; border-top: 1px solid rgba(255,255,255,0.04); }
.footer strong { color: #f6e05e; }
.footer-bottom { margin-top: 12px; padding-top: 12px; border-top: 1px solid rgba(255,255,255,0.04); font-size: 12px; color: rgba(255,255,255,0.3); }

/* =============================================
   响应式
   ============================================= */
@media (max-width: 992px) {
    .service-grid { grid-template-columns: repeat(2, 1fr); }
    .fleet-grid { grid-template-columns: repeat(2, 1fr); }
    .advantage-grid { grid-template-columns: repeat(2, 1fr); }
    .knowledge-grid { grid-template-columns: repeat(2, 1fr); }
    .city-grid { grid-template-columns: repeat(4, 1fr); }
}
@media (max-width: 768px) {
    .header .container { flex-direction: column; gap: 8px; text-align: center; }
    .header-right { flex-direction: column; gap: 8px; width: 100%; }
    .nav-menu { flex-wrap: wrap; justify-content: center; padding: 6px; background: rgba(255,255,255,0.06); }
    .nav-link { padding: 5px 14px; font-size: 12px; }
    .banner { padding: 48px 0; }
    .banner h1 { font-size: 28px; }
    .banner p { font-size: 15px; }
    .banner-info { flex-direction: column; gap: 8px; }
    .banner-info span { padding: 6px 16px; font-size: 13px; }
    .about-stats { gap: 30px; }
    .about-stats strong { font-size: 28px; }
    .service-grid { grid-template-columns: 1fr; }
    .fleet-grid { grid-template-columns: 1fr; }
    .advantage-grid { grid-template-columns: 1fr; }
    .knowledge-grid { grid-template-columns: 1fr; }
    .contact-form { padding: 20px; }
    .city-grid { grid-template-columns: repeat(3, 1fr); }
    .testimonial-card { flex: 0 0 240px; padding: 18px 16px; }
    .testimonial-body p { font-size: 13px; -webkit-line-clamp: 2; }
}
@media (max-width: 480px) {
    .city-grid { grid-template-columns: repeat(2, 1fr); }
    .city-item { padding: 14px 10px; }
    .city-item h3 { font-size: 13px; }
    .city-item p { font-size: 11px; min-height: 24px; }
}