的/* ========== 全局重置 & 基础 ========== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
    --primary: #005CC8;
    --primary-dark: #004a9e;
    --primary-light: #e8f0fe;
    --primary-glow: #0099ff;
    --bg-dark: #0a1628;
    --bg-dark-2: #0d2137;
    --bg-light: #f0f6ff;
    --bg-card: rgba(255,255,255,0.06);
    --border-glass: rgba(255,255,255,0.12);
    --border-glass-hover: rgba(0,153,255,0.4);
    --text-dark: #1a1a2e;
    --text-gray: #6b7280;
    --text-light: #ffffff;
    --shadow: 0 4px 20px rgba(0,92,200,0.10);
    --shadow-hover: 0 8px 40px rgba(0,92,200,0.18);
    --shadow-glow: 0 0 30px rgba(0,92,200,0.2);
    --radius: 12px;
    --transition: 0.35s cubic-bezier(.4,0,.2,1);
}

html { scroll-behavior: smooth; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
    color: var(--text-dark);
    background: #ffffff;
    line-height: 1.7;
    overflow-x: hidden;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

.container {
    width: 80%;
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ========== 导航栏 ========== */
.header {
    position: fixed;
    top: 0; left: 0; right: 0;
    background: transparent;
    z-index: 1000;
    box-shadow: none;
    transition: background 0.35s ease, box-shadow 0.35s ease;
}

.header.scrolled {
    background: #ffffff;
    box-shadow: 0 2px 20px rgba(0,0,0,0.1);
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 91px;
}

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.logo-text {
    font-size: 28px;
    font-weight: 800;
    letter-spacing: 5px;
    color: #ffffff;
}

.header.scrolled .logo-text {
    background: none;
    -webkit-text-fill-color: var(--text-dark);
    color: var(--text-dark);
}

.footer-logo {
    height: 60px;
    width: auto;
    display: block;
    margin-bottom: 12px;
}

.logo-text .highlight { color: #ffd700; }

.nav ul {
    display: flex;
    gap: 6px;
}

.nav a {
    display: block;
    padding: 8px 16px;
    color: rgba(255,255,255,0.85);
    font-size: 16px;
    border-radius: 6px;
    transition: var(--transition);
    position: relative;
}

.nav a:hover,
.nav a.active {
    color: #ffffff;
    background: rgba(255,255,255,0.15);
}

/* 滚动后白色导航栏 - 文字颜色切换 */
.header.scrolled .nav a {
    color: var(--text-dark);
}

.header.scrolled .nav a:hover,
.header.scrolled .nav a.active {
    color: var(--primary);
    background: var(--primary-light);
}

/* 滚动后汉堡菜单颜色 */
.header.scrolled .hamburger span {
    background: var(--text-dark);
}

/* 滚动后移动菜单背景 */
.header.scrolled .nav {
    background: #ffffff;
}

/* 汉堡菜单 */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.hamburger span {
    width: 28px;
    height: 3px;
    background: #fff;
    border-radius: 2px;
    transition: var(--transition);
}

/* ========== Hero 大屏 ========== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #0a1628 0%, #003a7a 50%, #005CC8 100%);
    padding-top: 91px;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%; right: -30%;
    width: 600px; height: 600px;
    background: radial-gradient(circle, rgba(255,215,0,0.08) 0%, transparent 70%);
    border-radius: 50%;
    animation: float 8s ease-in-out infinite;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -30%; left: -20%;
    width: 500px; height: 500px;
    background: radial-gradient(circle, rgba(255,255,255,0.04) 0%, transparent 70%);
    border-radius: 50%;
    animation: float 10s ease-in-out infinite reverse;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(30px, -30px); }
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
    opacity: 0.6;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    text-align: center;
}

.hero-content h1 {
    font-size: clamp(28px, 5vw, 48px);
    font-weight: 800;
    color: #ffffff;
    margin-bottom: 36px;
    line-height: 1.25;
}

.hero-content p {
    font-size: clamp(16px, 2.5vw, 22px);
    color: rgba(255,255,255,0.85);
    margin-bottom: 24px;
}

.hero-sub {
    font-size: 18px !important;
    color: #ffd700 !important;
    font-weight: 600;
    margin-bottom: 48px !important;
}

.hero-btns {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ========== 按钮 ========== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 36px;
    border-radius: 50px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

.btn-primary {
    background: var(--primary);
    color: #ffffff;
    box-shadow: 0 4px 15px rgba(0,92,200,0.35);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0,92,200,0.45);
}

.btn-outline {
    background: transparent;
    color: #ffffff;
    border: 2px solid rgba(255,255,255,0.5);
}

.btn-outline:hover {
    border-color: #ffffff;
    background: rgba(255,255,255,0.1);
    transform: translateY(-2px);
}

/* ========== 通用 Section ========== */
.section {
    padding: 100px 0;
    position: relative;
}

.section::before {
    content: '';
    position: absolute;
    top: 0; left: 10%; right: 10%;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(0,153,255,0.3), transparent);
}

.section:nth-child(even) { background: var(--bg-light); }

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: clamp(26px, 3.5vw, 36px);
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: 16px;
}

.section-header p {
    font-size: 18px;
    color: var(--text-gray);
}

.divider {
    width: 70px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--primary-glow));
    border-radius: 2px;
    margin: 0 auto 16px;
    box-shadow: 0 0 15px rgba(0,153,255,0.3);
}

/* ========== 关于我们 ========== */
.about { padding: 125px 0; }

.about-content {
    display: grid;
    grid-template-columns: 1fr 1.1fr;
    gap: 60px;
    align-items: center;
}

.about-text p {
    margin-bottom: 20px;
    font-size: 16px;
    color: var(--text-gray);
    line-height: 2;
}

.about-text strong { color: var(--primary); }

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.stat-item {
    background: #ffffff;
    border-radius: var(--radius);
    padding: 40px 24px;
    text-align: center;
    box-shadow: var(--shadow);
    border: 1px solid rgba(0,92,200,0.06);
    transition: var(--transition);
}

.stat-item:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
}

.stat-num {
    font-size: 48px;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
}

.stat-unit {
    font-size: 22px;
    font-weight: 700;
    color: var(--primary);
}

.stat-label {
    display: block;
    font-size: 15px;
    color: var(--text-gray);
    margin-top: 10px;
}

/* ========== 企业文化 (使命/愿景/价值观) ========== */
.mission { background: linear-gradient(135deg, #0a1628 0%, #003a7a 100%) !important; }

.mission .section-header h2 { color: #ffffff; }
.mission .section-header p { color: rgba(255,255,255,0.7); }
.mission .divider { background: linear-gradient(90deg, #ffd700, #ffffff); }

.mission-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.mission-card {
    background: rgba(255,255,255,0.06);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--radius);
    padding: 40px 30px;
    text-align: left;
    transition: var(--transition);
}

.mission-card:hover {
    background: rgba(255,255,255,0.10);
    transform: translateY(-6px);
    border-color: #ffd700;
}

.mission-icon {
    width: 70px; height: 70px;
    margin: 0 0 20px;
    background: rgba(255,215,0,0.15);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    color: #ffd700;
}

.mission-card h3 {
    font-size: 20px;
    color: #ffffff;
    margin-bottom: 16px;
    text-align: left;
}

.mission-card p {
    font-size: 15px;
    color: rgba(255,255,255,0.75);
    line-height: 1.8;
}

.mission-text {
    text-align: left;
}

/* ========== 业务领域 ========== */
.business-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.business-card {
    background: #ffffff;
    border-radius: var(--radius);
    padding: 36px 28px;
    text-align: center;
    box-shadow: var(--shadow);
    border: 1px solid rgba(0,92,200,0.06);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.business-card::after {
    content: '';
    position: absolute;
    bottom: 0; left: 20%; right: 20%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--primary-glow), transparent);
    opacity: 0;
    transition: var(--transition);
}

.business-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-glow);
    border-color: rgba(0,153,255,0.2);
}

.business-card:hover::after {
    opacity: 1;
    left: 10%;
    right: 10%;
}

.biz-icon {
    width: 64px; height: 64px;
    margin: 0 auto 18px;
    background: linear-gradient(135deg, var(--primary-light), #d4e4fc);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 26px;
    color: var(--primary);
    transition: var(--transition);
}

.business-card:hover .biz-icon {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #ffffff;
    box-shadow: 0 0 25px rgba(0,92,200,0.35);
}

.business-card h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-dark);
}

.business-card p {
    font-size: 14px;
    color: var(--text-gray);
    line-height: 1.7;
}

/* ========== 互联网+ ========== */
.internet-plus {
    background: linear-gradient(135deg, #0a1628 0%, #003a7a 50%, #0d2137 100%) !important;
}

.internet-plus .section-header h2 { color: #ffffff; }
.internet-plus .section-header p { color: rgba(255,255,255,0.6); }
.internet-plus .divider { background: linear-gradient(90deg, #0099ff, #00f2fe); box-shadow: 0 0 20px rgba(0,153,255,0.5); }

.internet-plus-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.ip-card {
    background: rgba(255,255,255,0.06);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: var(--radius);
    border: 1px solid var(--border-glass);
    overflow: hidden;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.ip-card:hover {
    transform: translateY(-6px);
    border-color: var(--border-glass-hover);
    box-shadow: 0 0 35px rgba(0,153,255,0.2);
}

.ip-card-img {
    width: 100%;
    height: 260px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0,153,255,0.05);
    flex-shrink: 0;
    overflow: hidden;
}

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

.ip-card-body {
    padding: 24px 20px 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.ip-card-body h3 {
    font-size: 18px;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 10px;
    line-height: 1.4;
}

.ip-card-subtitle {
    font-size: 14px;
    color: rgba(255,255,255,0.65);
    line-height: 1.7;
    margin-bottom: 20px;
    flex: 1;
}

.ip-detail-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 22px;
    background: rgba(0,153,255,0.15);
    color: var(--primary-glow);
    border: 1px solid rgba(0,153,255,0.3);
    border-radius: 50px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
    white-space: nowrap;
}

.ip-detail-btn:hover {
    background: var(--primary-glow);
    color: #ffffff;
    border-color: var(--primary-glow);
}

.ip-detail-btn i {
    font-size: 12px;
    transition: var(--transition);
}

.ip-detail-btn:hover i {
    transform: translateX(4px);
}

/* ========== 详情弹窗 ========== */
.detail-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.7);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.35s ease;
}

.detail-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.detail-modal {
    background: #ffffff;
    border-radius: var(--radius);
    width: 90%;
    max-width: 660px;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
    position: relative;
    transform: translateY(20px);
    transition: transform 0.35s ease;
}

.detail-overlay.active .detail-modal {
    transform: translateY(0);
}

.detail-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 36px;
    height: 36px;
    background: rgba(0,0,0,0.06);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    color: var(--text-gray);
    transition: var(--transition);
    z-index: 2;
}

.detail-close:hover {
    background: rgba(0,0,0,0.12);
    color: var(--text-dark);
}

.detail-modal-header {
    background: linear-gradient(135deg, var(--primary), #003a7a);
    padding: 30px 36px 24px;
}

.detail-modal-header h3 {
    font-size: 22px;
    font-weight: 700;
    color: #ffffff;
}

.detail-modal-body {
    padding: 32px 36px 40px;
}

.detail-modal-body p {
    font-size: 15px;
    color: var(--text-gray);
    line-height: 2;
}

/* ========== 联系我们 ========== */
.contact { background: var(--bg-light); }

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1.02fr;
    gap: 50px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    justify-content: space-evenly;
    height: 100%;
}

.contact-item {
    display: flex;
    gap: 18px;
    align-items: flex-start;
}

.contact-item i {
    width: 50px; height: 50px;
    min-width: 50px;
    background: var(--primary-light);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: var(--primary);
}

.contact-item h4 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 4px;
    color: var(--text-dark);
}

.contact-item p,
.contact-item a {
    font-size: 15px;
    color: var(--text-gray);
}

.contact-item a:hover { color: var(--primary); }

/* 联系表单 */
.contact-form {
    background: #ffffff;
    border-radius: var(--radius);
    padding: 30px;
    box-shadow: var(--shadow);
    border: 1px solid rgba(0,92,200,0.06);
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
}

.form-row {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    margin-bottom: 16px;
}

.form-row input {
    width: 80%;
}

.contact-form input,
.contact-form textarea {
    width: 80%;
    padding: 14px 18px;
    border: 1.5px solid #e5e7eb;
    border-radius: 8px;
    font-size: 15px;
    font-family: inherit;
    transition: var(--transition);
    outline: none;
    background: #f9fafb;
}

.contact-form input {
    margin-bottom: 0;
}

.contact-form textarea {
    display: block;
    margin: 0 auto 16px;
    resize: vertical;
}

.contact-form input:focus,
.contact-form textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0,92,200,0.1);
    background: #ffffff;
}

.contact-form .btn { width: 50%; display: flex; justify-content: center; margin: 0 auto; margin-top: 4px; }

/* ========== 页脚 ========== */
.footer {
    background: var(--bg-dark);
    color: rgba(255,255,255,0.8);
    padding: 32px 0 0;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 28px;
    padding-bottom: 20px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer-brand {
    flex-shrink: 0;
}

.footer-brand p {
    font-size: 14px;
    color: rgba(255,255,255,0.55);
    line-height: 1.8;
    white-space: nowrap;
}

.footer h4 {
    color: #ffffff;
    font-size: 16px;
    margin-bottom: 10px;
    text-align: left;
}

/* 快速导航 - 横排展示 */
.footer-links ul {
    display: flex;
    gap: 28px;
    list-style: none;
}

.footer-links a {
    color: rgba(255,255,255,0.55);
    font-size: 14px;
    white-space: nowrap;
    transition: var(--transition);
}

.footer-links a:hover { color: #ffd700; }

.footer-bottom {
    text-align: center;
    padding: 10px 0;
    font-size: 13px;
    color: rgba(255,255,255,0.4);
}

/* ========== 动画 ========== */
[data-aos] {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

[data-aos].aos-animate {
    opacity: 1;
    transform: translateY(0);
}

[data-aos-delay="100"].aos-animate { transition-delay: 0.1s; }
[data-aos-delay="200"].aos-animate { transition-delay: 0.2s; }
[data-aos-delay="300"].aos-animate { transition-delay: 0.3s; }

/* ========== 响应式 ========== */
@media (max-width: 992px) {
    .about-content { grid-template-columns: 1fr; gap: 40px; }
    .mission-grid { grid-template-columns: 1fr 1fr; }
    .business-grid { grid-template-columns: 1fr 1fr; }
    .internet-plus-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-content { flex-direction: column; align-items: center; gap: 40px; }
    .footer-links ul { gap: 24px; flex-wrap: wrap; justify-content: center; }
}

@media (max-width: 768px) {
    .hamburger { display: flex; }

    .nav {
        position: fixed;
        top: 91px; left: 0; right: 0;
        background: var(--primary);
        padding: 20px;
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: var(--transition);
        box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    }

    .nav.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }

    .nav ul {
        flex-direction: column;
        gap: 4px;
    }

    .nav a {
        padding: 12px 16px;
        font-size: 16px;
    }

    .hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(6px, 6px); }
    .hamburger.active span:nth-child(2) { opacity: 0; }
    .hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(6px, -6px); }

    .section { padding: 70px 0; }

    .about-stats { grid-template-columns: repeat(3, 1fr); gap: 12px; }
    .stat-num { font-size: 32px; }

    .mission-grid { grid-template-columns: 1fr; }
    .business-grid { grid-template-columns: 1fr; }
    .internet-plus-grid { grid-template-columns: 1fr; }
    .contact-content { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }

    .footer-content { flex-direction: column; align-items: center; gap: 30px; }
    .footer-links ul { flex-direction: column; align-items: flex-start; gap: 12px; }
    .hero-btns { flex-direction: column; align-items: center; }

}

@media (max-width: 480px) {
    .about-stats { grid-template-columns: 1fr; gap: 16px; }
    .stat-item { padding: 20px; }
}