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

:root {
    --primary-color: #1a5276;
    --secondary-color: #2e86c1;
    --accent-color: #e74c3c;
    --dark-color: #1c2833;
    --light-color: #f8f9fa;
    --gray-color: #7f8c8d;
    --text-color: #2c3e50;
    --white: #ffffff;
    --shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

body {
    font-family: "Microsoft YaHei", "微软雅黑", "Helvetica Neue", Arial, sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    background-color: var(--white);
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul, ol {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 50px;
}

.section-title h2 {
    font-size: 32px;
    color: var(--dark-color);
    margin-bottom: 15px;
    position: relative;
    display: inline-block;
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--secondary-color);
    border-radius: 2px;
}

.section-title p {
    color: var(--gray-color);
    font-size: 16px;
    margin-top: 20px;
}

/* ==================== 导航栏 ==================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow);
    z-index: 1000;
    transition: var(--transition);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 72px;
}

.navbar .logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 18px;
    font-weight: bold;
    color: var(--primary-color);
    white-space: nowrap;
}

.navbar .logo img {
    width: 40px;
    height: 40px;
    flex-shrink: 0;
}

.nav-menu {
    display: flex;
    gap: 5px;
}

.nav-menu li a {
    display: block;
    padding: 10px 18px;
    font-size: 16px;
    color: var(--text-color);
    border-radius: 6px;
    position: relative;
}

.nav-menu li a:hover,
.nav-menu li a.active {
    color: var(--secondary-color);
    background: rgba(46, 134, 193, 0.08);
}

.nav-menu li a.active::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 18px;
    right: 18px;
    height: 2px;
    background: var(--secondary-color);
    border-radius: 1px;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--primary-color);
    border-radius: 2px;
    transition: var(--transition);
}

/* ==================== 页脚 ==================== */
.footer {
    background: var(--dark-color);
    color: #bdc3c7;
    padding: 50px 0 20px;
}

.footer-top {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr 1.1fr 1fr;
    gap: 28px;
    margin-bottom: 34px;
    align-items: start;
}

.footer-col h3 {
    color: var(--white);
    font-size: 18px;
    margin-bottom: 16px;
}

.footer-brand p {
    margin-bottom: 16px;
    font-size: 14px;
    line-height: 1.8;
    color: #bdc3c7;
}

.footer-col ul li {
    margin-bottom: 8px;
}

.footer-col ul li a {
    font-size: 14px;
    color: #bdc3c7;
}

.footer-col ul li a:hover {
    color: var(--secondary-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 18px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 14px;
}

.footer-disclaimer-link {
    color: #bdc3c7;
    text-decoration: underline;
    text-underline-offset: 3px;
}

.footer-disclaimer-link:hover {
    color: var(--white);
}

/* ==================== 按钮 ==================== */
.btn {
    display: inline-block;
    padding: 12px 32px;
    border-radius: 6px;
    font-size: 16px;
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

.btn-primary {
    background: var(--secondary-color);
    color: var(--white);
}

.btn-primary:hover {
    background: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(46, 134, 193, 0.4);
}

.btn-outline {
    background: transparent;
    color: var(--white);
    border: 2px solid var(--white);
}

.btn-outline:hover {
    background: var(--white);
    color: var(--primary-color);
}

/* ==================== 轮播图 ==================== */
.carousel {
    position: relative;
    width: 100%;
    height: 600px;
    overflow: hidden;
    margin-top: 72px;
}

.carousel-inner {
    width: 100%;
    height: 100%;
    position: relative;
}

.carousel-item {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 1s ease-in-out;
}

.carousel-item.active {
    opacity: 1;
}

.carousel-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.carousel-item {
    background-color: #071426;
    background-image:
        radial-gradient(700px 360px at var(--mx, 12%) var(--my, 50%), rgba(56,189,248,0.38), transparent 62%),
        radial-gradient(700px 360px at calc(100% - var(--mx, 12%)) calc(100% - var(--my, 50%)), rgba(46,134,193,0.42), transparent 62%),
        radial-gradient(circle at 1px 1px, rgba(56,189,248,0.75) 1px, transparent 0),
        linear-gradient(rgba(56,189,248,0.09) 1px, transparent 1px),
        linear-gradient(90deg, rgba(56,189,248,0.09) 1px, transparent 1px),
        repeating-linear-gradient(180deg, transparent 0 18px, rgba(56,189,248,0.22) 18px 20px, transparent 20px 42px),
        linear-gradient(180deg, #0c2238 0%, #070f1d 100%);
    background-size: auto, auto, 28px 28px, 36px 36px, 36px 36px, 100% 42px, auto;
    background-position: var(--mx, 12%) var(--my, 50%), calc(100% - var(--mx, 12%)) calc(100% - var(--my, 50%)), 0 0, 0 0, 0 0, 0 0, center;
    animation: techGridDrift 12s linear infinite, techVerticalFlow 2.2s linear infinite, techGlowPulse 2.8s ease-in-out infinite;
    will-change: background-position, filter;
    transition: opacity 1s ease-in-out, filter 0.25s ease;
}

.carousel-item img {
    object-fit: contain;
    position: relative;
}

/* 科技感光晕装饰 - 左右两侧流动光条 */
.carousel-item::before,
.carousel-item::after {
    content: '';
    position: absolute;
    top: 50%;
    width: 38%;
    height: 2px;
    background: linear-gradient(90deg, transparent, rgba(56,189,248,0.9), transparent);
    box-shadow: 0 0 12px rgba(56,189,248,0.8), 0 0 24px rgba(46,134,193,0.45);
    z-index: 1;
    pointer-events: none;
}

.carousel-item::before {
    left: -10%;
    transform: translateY(-52px);
    animation: techScanMove 3.2s ease-in-out infinite;
}

.carousel-item::after {
    right: -10%;
    transform: translateY(52px);
    animation: techScanMove 3.2s ease-in-out infinite reverse;
}

@keyframes techGridDrift {
    0% { background-position: var(--mx, 12%) var(--my, 50%), calc(100% - var(--mx, 12%)) calc(100% - var(--my, 50%)), 0 0, 0 0, 0 0, 0 0, center; }
    100% { background-position: var(--mx, 12%) var(--my, 50%), calc(100% - var(--mx, 12%)) calc(100% - var(--my, 50%)), 28px 28px, 36px 36px, 36px 36px, 0 0, center; }
}

@keyframes techVerticalFlow {
    0% { background-position: var(--mx, 12%) var(--my, 50%), calc(100% - var(--mx, 12%)) calc(100% - var(--my, 50%)), 0 0, 0 0, 0 0, 0 0, center; }
    100% { background-position: var(--mx, 12%) var(--my, 50%), calc(100% - var(--mx, 12%)) calc(100% - var(--my, 50%)), 0 0, 0 0, 0 0, 0 42px, center; }
}

@keyframes techGlowPulse {
    0%, 100% { filter: brightness(1); }
    50% { filter: brightness(1.18); }
}

@keyframes techScanMove {
    0% { transform: translateY(var(--ty, 0)) translateX(-18%); opacity: 0; }
    20% { opacity: 1; }
    80% { opacity: 1; }
    100% { transform: translateY(var(--ty, 0)) translateX(18%); opacity: 0; }
}

.carousel-item::before { --ty: -52px; }
.carousel-item::after { --ty: 52px; }

.carousel-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
}

.carousel-content {
    text-align: center;
    color: var(--white);
    max-width: 800px;
    padding: 0 20px;
}

.carousel-content h1 {
    font-size: 42px;
    margin-bottom: 20px;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
    animation: fadeInUp 1s ease;
}

.carousel-content h1.carousel-title-long {
    font-size: 34px;
    line-height: 1.25;
    max-width: 920px;
    margin-left: auto;
    margin-right: auto;
}

.carousel-content p {
    font-size: 20px;
    margin-bottom: 30px;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
    animation: fadeInUp 1.2s ease;
}

.carousel-content .btn {
    animation: fadeInUp 1.4s ease;
}

.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0, 0, 0, 0.3);
    color: var(--white);
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    font-size: 24px;
    cursor: pointer;
    transition: var(--transition);
    z-index: 10;
}

.carousel-btn:hover {
    background: rgba(0, 0, 0, 0.6);
}

.carousel-btn.prev {
    left: 30px;
}

.carousel-btn.next {
    right: 30px;
}

.carousel-indicators {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 10;
}

.carousel-indicators span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: var(--transition);
}

.carousel-indicators span.active {
    background: var(--white);
    width: 30px;
    border-radius: 6px;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==================== 卡片 ==================== */
.card {
    background: var(--white);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
}

.card img {
    width: 100%;
    height: 220px;
    object-fit: cover;
}

.card-body {
    padding: 25px;
}

.card-body h3 {
    font-size: 20px;
    margin-bottom: 12px;
    color: var(--dark-color);
}

.card-body p {
    color: var(--gray-color);
    font-size: 14px;
}

/* ==================== 留言板 ==================== */
.message-board {
    background: var(--light-color);
}

.message-form {
    max-width: 800px;
    margin: 0 auto;
    background: var(--white);
    padding: 40px;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--dark-color);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 15px;
    font-family: inherit;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--secondary-color);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.message-list {
    max-width: 800px;
    margin: 40px auto 0;
}

.message-item {
    background: var(--white);
    padding: 20px 25px;
    border-radius: 10px;
    margin-bottom: 15px;
    box-shadow: var(--shadow);
    border-left: 4px solid var(--secondary-color);
}

.message-item .msg-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.message-item .msg-name {
    font-weight: bold;
    color: var(--primary-color);
}

.message-item .msg-time {
    font-size: 13px;
    color: var(--gray-color);
}

.message-item .msg-content {
    color: var(--text-color);
    line-height: 1.8;
}

/* ==================== 分页 ==================== */
.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 40px;
}

.pagination a {
    display: inline-block;
    padding: 8px 16px;
    border: 1px solid #e0e0e0;
    border-radius: 6px;
    color: var(--text-color);
    font-size: 14px;
}

.pagination a:hover,
.pagination a.active {
    background: var(--secondary-color);
    color: var(--white);
    border-color: var(--secondary-color);
}

/* ==================== 面包屑 ==================== */
.breadcrumb {
    margin-top: 72px;
    background: var(--light-color);
    padding: 15px 0;
}

.breadcrumb ul {
    display: flex;
    gap: 10px;
    font-size: 14px;
}

.breadcrumb ul li::after {
    content: '/';
    margin-left: 10px;
    color: var(--gray-color);
}

.breadcrumb ul li:last-child::after {
    content: '';
}

.breadcrumb ul li a:hover {
    color: var(--secondary-color);
}

/* ==================== 滚动动画 ==================== */
[data-reveal] {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

[data-reveal="fade-up"] {
    transform: translateY(40px);
}

[data-reveal="fade-down"] {
    transform: translateY(-40px);
}

[data-reveal="fade-left"] {
    transform: translateX(40px);
}

[data-reveal="fade-right"] {
    transform: translateX(-40px);
}

[data-reveal="zoom-in"] {
    transform: scale(0.9);
}

[data-reveal].revealed {
    opacity: 1;
    transform: translate(0, 0) scale(1);
}

/* ==================== 浮动按钮 ==================== */
.floating-buttons {
    position: fixed;
    right: 24px;
    bottom: 24px;
    z-index: 999;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.float-btn {
    position: relative;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.2);
    transition: var(--transition);
    text-decoration: none;
}

.float-service {
    background: var(--secondary-color);
}

.float-service:hover {
    background: var(--primary-color);
    transform: scale(1.1);
}

.float-wechat {
    background: #07c160;
}

.float-wechat:hover {
    transform: scale(1.1);
}

.float-top {
    background: var(--dark-color);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
}

.float-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.float-top:hover {
    background: var(--primary-color);
    transform: translateY(-3px);
}

.float-tooltip {
    position: absolute;
    right: 60px;
    top: 50%;
    transform: translateY(-50%);
    background: var(--dark-color);
    color: var(--white);
    padding: 6px 14px;
    border-radius: 6px;
    font-size: 13px;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    pointer-events: none;
}

.float-btn:hover .float-tooltip {
    opacity: 1;
    visibility: visible;
}

.float-qr-tooltip {
    position: absolute;
    right: 60px;
    bottom: 0;
    background: var(--white);
    border-radius: 10px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    padding: 12px;
    text-align: center;
    opacity: 0;
    visibility: hidden;
    transform: translateX(10px);
    transition: var(--transition);
    pointer-events: none;
    width: 160px;
}

.qr-placeholder {
    width: 100%;
    aspect-ratio: 1 / 1;
    border-radius: 8px;
    background: linear-gradient(135deg, #f3f7fb, #e8eef5);
    border: 1px dashed #cfd8e3;
    margin-bottom: 6px;
}

.float-qr-tooltip p {
    font-size: 12px;
    color: var(--gray-color);
    margin: 0;
}

.float-wechat:hover .float-qr-tooltip {
    opacity: 1;
    visibility: visible;
    transform: translateX(0);
}

/* ==================== 页脚社交图标 ==================== */
.footer-social {
    display: flex;
    gap: 12px;
    margin-top: 16px;
}

.footer-social .social-icon {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    color: #bdc3c7;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    position: relative;
}

.footer-social .social-icon:hover {
    background: var(--secondary-color);
    color: var(--white);
    transform: translateY(-3px);
}

.footer-social .social-icon.social-wechat {
    cursor: default;
}

.footer-qr-tooltip {
    position: absolute;
    left: 0;
    top: 48px;
    background: var(--white);
    border-radius: 10px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    padding: 12px;
    text-align: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: var(--transition);
    pointer-events: none;
    width: 160px;
    z-index: 5;
}

.footer-social .social-icon.social-wechat:hover .footer-qr-tooltip {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.footer-qr-tooltip p {
    font-size: 12px;
    color: var(--gray-color);
    margin: 0;
}

.footer-qr-tooltip .qr-placeholder {
    width: 100%;
    aspect-ratio: 1 / 1;
    border-radius: 8px;
    background: linear-gradient(135deg, #f3f7fb, #e8eef5);
    border: 1px dashed #cfd8e3;
    margin-bottom: 6px;
}

/* ==================== 响应式 ==================== */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: var(--white);
        flex-direction: column;
        padding: 10px 0;
        box-shadow: var(--shadow);
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-toggle {
        display: flex;
    }

    .carousel {
        height: 400px;
    }

    .carousel-content h1 {
        font-size: 28px;
    }

    .carousel-content p {
        font-size: 16px;
    }

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

    .form-row {
        grid-template-columns: 1fr;
    }

    .section-title h2 {
        font-size: 26px;
    }

    .floating-buttons {
        right: 16px;
        bottom: 16px;
    }

    .float-btn {
        width: 46px;
        height: 46px;
    }

    .float-tooltip,
    .float-qr-tooltip {
        right: 56px;
    }
}