/* ===== CSS Reset & Base ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    color: #333;
    line-height: 1.8;
    background: #fff;
}
a { color: inherit; text-decoration: none; transition: color 0.3s; }
img { max-width: 100%; height: auto; }
ul, ol { list-style: none; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* ===== 顶部信息栏 ===== */
.top-bar {
    background: #1a1a2e;
    color: #ccc;
    font-size: 13px;
    padding: 8px 0;
}
.top-bar-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}
.top-info { letter-spacing: 0.5px; }
.top-contact { display: flex; gap: 16px; }
.phone-link { color: #f0c040; font-weight: 600; }
.phone-link:hover { color: #ffd700; }

/* ===== 导航栏 ===== */
.main-nav {
    background: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: all 0.3s;
}
.main-nav.fixed { box-shadow: 0 2px 20px rgba(0,0,0,0.15); }
.nav-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
    height: 64px;
}
.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 20px;
    font-weight: 700;
    color: #e63946;
    flex-shrink: 0;
}
.logo-icon { font-size: 28px; }
.nav-list {
    display: flex;
    gap: 4px;
}
.nav-list a {
    display: block;
    padding: 8px 14px;
    font-size: 15px;
    color: #333;
    border-radius: 6px;
    transition: all 0.3s;
    white-space: nowrap;
}
.nav-list a:hover, .nav-list a.active {
    color: #e63946;
    background: #fff5f5;
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}
.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: #333;
    transition: all 0.3s;
}
.mobile-menu-btn.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.mobile-menu-btn.active span:nth-child(2) { opacity: 0; }
.mobile-menu-btn.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ===== Hero Banner ===== */
.hero {
    position: relative;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    color: #fff;
    padding: 100px 0 80px;
    overflow: hidden;
}
.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(230,57,70,0.15) 0%, transparent 70%);
    border-radius: 50%;
}
.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(240,192,64,0.1) 0%, transparent 70%);
    border-radius: 50%;
}
.hero-content { position: relative; z-index: 1; text-align: center; }
.hero h1 {
    font-size: 40px;
    font-weight: 800;
    line-height: 1.3;
    margin-bottom: 20px;
    text-shadow: 0 2px 20px rgba(0,0,0,0.3);
}
.hero h1 em { font-style: normal; color: #f0c040; }
.hero-subtitle {
    font-size: 17px;
    color: #ccc;
    max-width: 800px;
    margin: 0 auto 30px;
    line-height: 1.9;
}
.hero-brands {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    margin-bottom: 40px;
}
.hero-brands span {
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.2);
    padding: 6px 18px;
    border-radius: 20px;
    font-size: 14px;
    color: #f0c040;
    font-weight: 500;
}
.hero-cta { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ===== 按钮 ===== */
.btn {
    display: inline-block;
    padding: 14px 36px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    text-align: center;
    transition: all 0.3s;
    cursor: pointer;
}
.btn-primary {
    background: linear-gradient(135deg, #e63946, #c0392b);
    color: #fff;
    box-shadow: 0 4px 15px rgba(230,57,70,0.4);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(230,57,70,0.5);
}
.btn-secondary {
    background: transparent;
    color: #fff;
    border: 2px solid rgba(255,255,255,0.5);
}
.btn-secondary:hover { border-color: #fff; background: rgba(255,255,255,0.1); }
.btn-sm { padding: 10px 24px; font-size: 14px; border-radius: 6px; }
.btn-lg { padding: 16px 44px; font-size: 18px; }

/* ===== Section通用 ===== */
.section-title {
    text-align: center;
    font-size: 32px;
    font-weight: 800;
    color: #1a1a2e;
    margin-bottom: 12px;
    position: relative;
    padding-bottom: 16px;
}
.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, #e63946, #f0c040);
    border-radius: 2px;
}
.section-desc {
    text-align: center;
    color: #666;
    font-size: 16px;
    max-width: 700px;
    margin: 0 auto 50px;
}

/* ===== 服务区域导航 ===== */
.area-nav {
    padding: 80px 0;
    background: #f8f9fa;
}
.area-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}
.area-item {
    background: #fff;
    border-radius: 12px;
    padding: 24px;
    border: 1px solid #eee;
    transition: all 0.3s;
    display: block;
}
.area-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.08);
    border-color: #e63946;
}
.area-item h3 {
    font-size: 16px;
    font-weight: 700;
    color: #e63946;
    margin-bottom: 8px;
}
.area-item p { font-size: 13px; color: #888; }

/* ===== 公司介绍 ===== */
.about {
    padding: 80px 0;
}
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}
.about-text h3 {
    font-size: 22px;
    color: #1a1a2e;
    margin: 24px 0 12px;
}
.about-text h3:first-child { margin-top: 0; }
.about-text p { color: #555; margin-bottom: 12px; font-size: 15px; }
.about-text strong { color: #e63946; }
.about-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    position: sticky;
    top: 100px;
}
.stat-item {
    background: linear-gradient(135deg, #1a1a2e, #16213e);
    color: #fff;
    border-radius: 16px;
    padding: 30px 20px;
    text-align: center;
}
.stat-number {
    font-size: 36px;
    font-weight: 800;
    color: #f0c040;
    margin-bottom: 4px;
}
.stat-number span { font-size: 18px; font-weight: 600; }
.stat-label { font-size: 14px; color: #ccc; }

/* ===== 产品展示 ===== */
.products {
    padding: 80px 0;
    background: #f8f9fa;
}
.product-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin-bottom: 40px;
}
.product-card {
    background: #fff;
    border-radius: 16px;
    padding: 36px;
    border: 1px solid #eee;
    transition: all 0.3s;
}
.product-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.08);
}
.product-power {
    display: inline-block;
    background: linear-gradient(135deg, #e63946, #c0392b);
    color: #fff;
    padding: 4px 16px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 16px;
}
.product-card h3 {
    font-size: 20px;
    color: #1a1a2e;
    margin-bottom: 10px;
}
.product-card > p { color: #666; font-size: 14px; margin-bottom: 16px; }
.product-features { margin-bottom: 20px; }
.product-features li {
    padding: 4px 0;
    font-size: 14px;
    color: #555;
    padding-left: 20px;
    position: relative;
}
.product-features li::before {
    content: '\2713';
    position: absolute;
    left: 0;
    color: #e63946;
    font-weight: 700;
}
.product-card .btn-sm {
    background: #e63946;
    color: #fff;
    border: none;
    display: inline-block;
}
.product-card .btn-sm:hover { background: #c0392b; }

.power-list {
    background: #fff;
    border-radius: 12px;
    padding: 24px 30px;
    border-left: 4px solid #e63946;
    margin-bottom: 40px;
}
.power-list h3 {
    font-size: 15px;
    color: #333;
    font-weight: 500;
}

.product-types {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.type-card {
    background: #fff;
    border-radius: 12px;
    padding: 30px;
    text-align: center;
    border: 1px solid #eee;
    transition: all 0.3s;
}
.type-card:hover { box-shadow: 0 8px 25px rgba(0,0,0,0.08); }
.type-icon { font-size: 48px; margin-bottom: 16px; }
.type-card h4 { font-size: 17px; color: #1a1a2e; margin-bottom: 10px; }
.type-card p { font-size: 14px; color: #666; }

/* ===== 六大优势 ===== */
.advantages {
    padding: 80px 0;
}
.advantage-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.advantage-card {
    background: #fff;
    border-radius: 16px;
    padding: 36px;
    border: 1px solid #eee;
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}
.advantage-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, #e63946, #f0c040);
}
.advantage-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.08);
}
.advantage-icon { font-size: 40px; margin-bottom: 16px; }
.advantage-num {
    display: inline-block;
    background: #fff5f5;
    color: #e63946;
    padding: 2px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 12px;
}
.advantage-card h3 { font-size: 18px; color: #1a1a2e; margin-bottom: 10px; }
.advantage-card p { font-size: 14px; color: #666; line-height: 1.8; }

/* ===== 出租优势 ===== */
.rental-benefits {
    padding: 80px 0;
    background: linear-gradient(135deg, #1a1a2e, #16213e);
    color: #fff;
}
.rental-benefits .section-title { color: #fff; }
.rental-benefits .section-title::after { background: linear-gradient(90deg, #f0c040, #e63946); }
.rental-benefits .section-desc { color: #ccc; }
.benefit-list { display: flex; flex-direction: column; gap: 24px; max-width: 800px; margin: 0 auto; }
.benefit-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
    background: rgba(255,255,255,0.05);
    border-radius: 12px;
    padding: 24px;
    border: 1px solid rgba(255,255,255,0.1);
    transition: all 0.3s;
}
.benefit-item:hover { background: rgba(255,255,255,0.1); }
.benefit-icon { font-size: 32px; flex-shrink: 0; }
.benefit-item h3 { font-size: 17px; color: #f0c040; margin-bottom: 4px; }
.benefit-item p { font-size: 14px; color: #ccc; }

/* ===== 租赁流程 ===== */
.process {
    padding: 80px 0;
    background: #f8f9fa;
}
.process-steps {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: 0;
    max-width: 1000px;
    margin: 0 auto 40px;
}
.step {
    flex: 1;
    text-align: center;
    padding: 0 20px;
    position: relative;
}
.step-num {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: linear-gradient(135deg, #e63946, #c0392b);
    color: #fff;
    font-size: 24px;
    font-weight: 800;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    box-shadow: 0 4px 15px rgba(230,57,70,0.3);
}
.step-content {
    background: #fff;
    border-radius: 12px;
    padding: 24px;
    border: 1px solid #eee;
}
.step-content h3 { font-size: 17px; color: #1a1a2e; margin-bottom: 10px; }
.step-content p { font-size: 14px; color: #666; }
.step-connector {
    width: 60px;
    height: 2px;
    background: linear-gradient(90deg, #e63946, #f0c040);
    margin-top: 32px;
    flex-shrink: 0;
}
.process-note {
    background: #fff;
    border-radius: 12px;
    padding: 20px 24px;
    border-left: 4px solid #f0c040;
    max-width: 800px;
    margin: 0 auto;
}
.process-note p { font-size: 14px; color: #666; }

/* ===== 客户案例 ===== */
.cases {
    padding: 80px 0;
}
.case-categories {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin-bottom: 30px;
}
.case-category {
    background: #fff;
    border-radius: 12px;
    padding: 28px;
    border: 1px solid #eee;
}
.case-category h3 {
    font-size: 18px;
    color: #1a1a2e;
    margin-bottom: 16px;
    padding-bottom: 10px;
    border-bottom: 2px solid #f0f0f0;
}
.case-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.case-tags span {
    background: #f8f9fa;
    border: 1px solid #eee;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 13px;
    color: #555;
    transition: all 0.3s;
}
.case-tags span:hover { border-color: #e63946; color: #e63946; }
.case-note {
    text-align: center;
    padding: 20px;
    color: #888;
    font-size: 14px;
    font-style: italic;
}

/* ===== FAQ ===== */
.faq {
    padding: 80px 0;
    background: #f8f9fa;
}
.faq-list {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 20px;
}
.faq-item {
    background: #fff;
    border-radius: 12px;
    border: 1px solid #eee;
    overflow: hidden;
    transition: all 0.3s;
}
.faq-item:hover { border-color: #e63946; }
.faq-item h3 {
    font-size: 17px;
    font-weight: 600;
    color: #1a1a2e;
    padding: 20px 24px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 10px;
}
.faq-item h3::before {
    content: 'Q';
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: #e63946;
    color: #fff;
    font-size: 13px;
    font-weight: 700;
    flex-shrink: 0;
}
.faq-answer {
    padding: 0 24px 20px 62px;
    font-size: 14px;
    color: #666;
    line-height: 2;
}
.faq-answer ol {
    padding-left: 20px;
    list-style: decimal;
    margin: 8px 0;
}
.faq-answer li { margin-bottom: 4px; }

/* ===== 品牌展示 ===== */
.brands {
    padding: 60px 0;
}
.brand-list {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 16px;
}
.brand-item {
    background: #f8f9fa;
    border: 1px solid #eee;
    border-radius: 10px;
    padding: 16px 10px;
    text-align: center;
    transition: all 0.3s;
}
.brand-item:hover { border-color: #e63946; box-shadow: 0 4px 15px rgba(0,0,0,0.06); }
.brand-item strong { display: block; font-size: 15px; color: #1a1a2e; margin-bottom: 2px; }
.brand-item span { font-size: 11px; color: #aaa; text-transform: uppercase; }

/* ===== 联系我们 ===== */
.contact {
    padding: 80px 0;
    background: linear-gradient(135deg, #1a1a2e, #16213e);
    color: #fff;
}
.contact .section-title { color: #fff; }
.contact .section-title::after { background: linear-gradient(90deg, #f0c040, #e63946); }
.contact .section-desc { color: #ccc; }
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}
.contact-item {
    display: flex;
    gap: 16px;
    margin-bottom: 28px;
}
.contact-icon { font-size: 28px; flex-shrink: 0; margin-top: 2px; }
.contact-item h3 { font-size: 16px; color: #f0c040; margin-bottom: 4px; }
.contact-item p { font-size: 14px; color: #ccc; }
.contact-item .hotline a {
    display: inline-block;
    font-size: 20px;
    font-weight: 700;
    color: #f0c040;
    margin: 4px 0;
}
.contact-item .hotline a:hover { color: #ffd700; }
.contact-cta {
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: 16px;
    padding: 40px;
    text-align: center;
}
.contact-cta h3 { font-size: 22px; margin-bottom: 12px; color: #f0c040; }
.contact-cta > p { font-size: 14px; color: #ccc; margin-bottom: 24px; }
.contact-cta .btn-primary {
    margin-bottom: 12px;
    display: block;
    width: 100%;
}
.contact-cta .btn-secondary {
    display: block;
    width: 100%;
    margin-bottom: 16px;
    color: #f0c040;
    border-color: rgba(240,192,64,0.5);
}
.contact-cta .btn-secondary:hover { border-color: #f0c040; background: rgba(240,192,64,0.1); }
.cta-note { font-size: 13px !important; color: #999 !important; }
.cta-note a { color: #f0c040; }

/* ===== Footer ===== */
.footer {
    background: #0d0d1a;
    color: #aaa;
    padding: 60px 0 0;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid #1a1a2e;
}
.footer-about h3, .footer-links h3, .footer-service-area h3, .footer-friends h3 {
    font-size: 16px;
    color: #fff;
    margin-bottom: 16px;
    padding-bottom: 10px;
    border-bottom: 2px solid #e63946;
    display: inline-block;
}
.footer-about p { font-size: 13px; margin-bottom: 8px; line-height: 1.8; }
.footer-about a { color: #f0c040; font-weight: 600; }
.footer-links ul, .footer-service-area ul, .footer-friends ul {
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.footer-links a, .footer-service-area a, .footer-friends a {
    font-size: 13px;
    color: #aaa;
    transition: all 0.3s;
}
.footer-links a:hover, .footer-service-area a:hover, .footer-friends a:hover { color: #f0c040; padding-left: 4px; }
.footer-bottom {
    text-align: center;
    padding: 20px 0;
    font-size: 13px;
    color: #666;
}
.footer-bottom a { color: #888; }

/* ===== 浮动电话按钮 ===== */
.float-phone {
    position: fixed;
    bottom: 80px;
    right: 20px;
    z-index: 999;
}
.float-phone a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: linear-gradient(135deg, #e63946, #c0392b);
    color: #fff;
    font-size: 26px;
    box-shadow: 0 4px 15px rgba(230,57,70,0.4);
    transition: all 0.3s;
    animation: phonePulse 2s infinite;
}
.float-phone a:hover { transform: scale(1.1); }
@keyframes phonePulse {
    0%, 100% { box-shadow: 0 4px 15px rgba(230,57,70,0.4); }
    50% { box-shadow: 0 4px 25px rgba(230,57,70,0.7); }
}

/* ===== 回到顶部 ===== */
.back-to-top {
    position: fixed;
    bottom: 20px;
    right: 24px;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: #1a1a2e;
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
    z-index: 999;
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
}
.back-to-top.visible { opacity: 1; visibility: visible; }
.back-to-top:hover { background: #e63946; }

/* ===== 响应式设计 ===== */
@media (max-width: 1024px) {
    .area-grid { grid-template-columns: repeat(3, 1fr); }
    .about-content { grid-template-columns: 1fr; gap: 40px; }
    .about-stats { position: static; }
    .advantage-grid { grid-template-columns: repeat(2, 1fr); }
    .product-types { grid-template-columns: repeat(2, 1fr); }
    .brand-list { grid-template-columns: repeat(4, 1fr); }
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .mobile-menu-btn { display: flex; }
    .nav-list {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        padding: 10px 20px;
        box-shadow: 0 10px 30px rgba(0,0,0,0.1);
        border-top: 1px solid #eee;
    }
    .nav-list.active { display: flex; }
    .nav-list a { padding: 12px 0; border-bottom: 1px solid #f0f0f0; }
    .hero { padding: 60px 0 50px; }
    .hero h1 { font-size: 24px; }
    .hero-subtitle { font-size: 14px; }
    .hero-brands span { font-size: 12px; padding: 4px 12px; }
    .section-title { font-size: 24px; }
    .section-desc { font-size: 14px; margin-bottom: 30px; }
    .area-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
    .area-item { padding: 16px; }
    .area-item h3 { font-size: 14px; }
    .area-item p { font-size: 12px; }
    .product-grid { grid-template-columns: 1fr; }
    .advantage-grid { grid-template-columns: 1fr; }
    .process-steps { flex-direction: column; align-items: center; }
    .step-connector { width: 2px; height: 30px; margin: 0; background: linear-gradient(180deg, #e63946, #f0c040); }
    .step { width: 100%; max-width: 400px; }
    .case-categories { grid-template-columns: 1fr; }
    .product-types { grid-template-columns: 1fr; }
    .brand-list { grid-template-columns: repeat(3, 1fr); }
    .contact-grid { grid-template-columns: 1fr; gap: 30px; }
    .contact-cta { padding: 24px; }
    .footer-grid { grid-template-columns: 1fr; gap: 30px; }
    .benefit-item { flex-direction: column; text-align: center; }
    .float-phone { bottom: 20px; right: 16px; }
    .float-phone a { width: 48px; height: 48px; font-size: 22px; }
}

@media (max-width: 480px) {
    .top-contact { flex-direction: column; gap: 4px; }
    .hero h1 { font-size: 20px; }
    .btn { padding: 12px 24px; font-size: 14px; }
    .btn-lg { padding: 12px 28px; font-size: 15px; }
    .brand-list { grid-template-columns: repeat(2, 1fr); }
    .area-grid { grid-template-columns: 1fr; }
    .stat-number { font-size: 28px; }
}