/* 基础重置与变量 */
:root {
    --primary-color: #0052d9;
    --primary-hover: #003eb3;
    --nav-blue: #00469b;
    --text-main: #181818;
    --text-regular: #4b4b4b;
    --text-light: #999999;
    --bg-white: #ffffff;
    --bg-light-gray: #f5f5f6;
    --bg-dark: #1e222d;
    --border-color: #e5e6eb;
    --shadow-light: 0 4px 20px 0 rgba(0,0,0,0.05);
    --shadow-hover: 0 8px 30px 0 rgba(0,0,0,0.1);
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

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

ul {
    list-style: none;
}

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

/* ========== 导航栏 ========== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 60px;
    background: var(--nav-blue);
    color: #fff;
    z-index: 1000;
    transition: var(--transition);
}

.header.scrolled {
    background: rgba(0, 70, 155, 0.97);
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.nav-container {
    display: flex;
    align-items: center;
    height: 100%;
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 32px;
}

.logo {
    font-size: 22px;
    font-weight: 800;
    color: #fff;
    margin-right: 32px;
    white-space: nowrap;
    flex-shrink: 0;
    display: flex;
    align-items: center;
}

.logo-img {
    max-height: 40px;
    width: auto;
}

/* 导航菜单 */
.nav-menu {
    display: flex;
    align-items: center;
    height: 100%;
    flex-shrink: 0;
}

.nav-item {
    position: static;
    height: 100%;
    display: flex;
    align-items: center;
    padding: 0 14px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 400;
    color: #fff;
    white-space: nowrap;
    transition: background 0.2s;
}

.nav-item:hover {
    background: rgba(255,255,255,0.15);
}

/* 搜索框 */
.nav-search {
    margin-left: auto;
    display: flex;
    align-items: center;
    background: #fff;
    border-radius: 2px;
    padding: 0 10px;
    width: 200px;
    height: 32px;
    flex-shrink: 0;
}

.nav-search input {
    border: none;
    outline: none;
    width: 100%;
    font-size: 12px;
    color: #333;
}

.nav-search i {
    color: var(--nav-blue);
    cursor: pointer;
}

/* 右侧链接 */
.nav-right-links {
    display: flex;
    align-items: center;
    gap: 18px;
    margin-left: 24px;
    font-size: 13px;
    flex-shrink: 0;
    color: #fff;
}

.nav-right-links a {
    color: #fff;
    white-space: nowrap;
}

.nav-right-links a:hover {
    opacity: 0.8;
}

/* 新样式按钮 */
.nav-link-simple {
    color: #fff !important;
    text-decoration: none;
    font-size: 14px;
    transition: opacity 0.2s;
}

.nav-link-simple:hover {
    opacity: 0.8;
}

.nav-link-outline {
    padding: 7px 18px;
    border: 1px solid rgba(255,255,255,0.3);
    border-radius: 4px;
    font-size: 14px;
    color: #fff !important;
    text-decoration: none;
    transition: all 0.2s;
    background: transparent;
}

.nav-link-outline:hover {
    border-color: rgba(255,255,255,0.6);
    background: rgba(255,255,255,0.1);
    opacity: 1;
}

.nav-link-primary {
    padding: 7px 18px;
    border: 1px solid #1890ff;
    border-radius: 4px;
    font-size: 14px;
    color: #fff !important;
    background: #1890ff;
    text-decoration: none;
    transition: all 0.2s;
}

.nav-link-primary:hover {
    background: #40a9ff;
    border-color: #40a9ff;
    opacity: 1;
}

/* ========== Mega Menu 大下拉菜单 ========== */
.mega-menu {
    position: absolute;
    top: 60px;
    left: 0;
    width: 100%;
    background: #fff;
    box-shadow: 0 8px 30px rgba(0,0,0,0.12);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-5px);
    transition: all 0.25s ease;
    padding: 32px 0;
    z-index: 999;
    color: var(--text-main);
}

.nav-item:hover > .mega-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.mega-menu-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 32px;
    display: flex;
    gap: 48px;
}

.mega-menu-sidebar {
    width: 200px;
    flex-shrink: 0;
    border-right: 1px solid var(--border-color);
    padding-right: 32px;
}

.mega-menu-sidebar h3 {
    font-size: 16px;
    color: var(--nav-blue);
    margin-bottom: 12px;
}

.mega-menu-sidebar p {
    font-size: 13px;
    color: var(--text-light);
    line-height: 1.6;
}

.mega-menu-columns {
    display: flex;
    gap: 40px;
    flex: 1;
}

.mega-col {
    min-width: 180px;
}

.mega-col h4 {
    font-size: 13px;
    color: var(--text-light);
    margin-bottom: 16px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-color);
    letter-spacing: 0.5px;
}

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

.mega-col ul li a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 6px 8px;
    border-radius: 4px;
    font-size: 14px;
    color: var(--text-main);
}

.mega-col ul li a:hover {
    background: var(--bg-light-gray);
    color: var(--nav-blue);
}

.mega-col ul li a i {
    font-size: 16px;
    color: var(--nav-blue);
    width: 20px;
    text-align: center;
}

.mega-col ul li a .item-desc {
    font-size: 12px;
    color: var(--text-light);
    margin-top: 2px;
}

.mega-col ul li a .item-info {
    display: flex;
    flex-direction: column;
}

.mega-col ul li a .item-info span:first-child {
    font-size: 14px;
}

/* ========== Hero Banner ========== */
.hero-banner {
    min-height: 520px;
    background: linear-gradient(135deg, #f0f4fa 0%, #e8eef8 50%, #f5f7fb 100%);
    padding-top: 60px;
    position: relative;
    overflow: hidden;
}

.hero-banner .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    min-height: 460px;
    max-width: 1280px;
    position: relative;
    z-index: 2;
}

.hero-content {
    max-width: 520px;
    position: relative;
    z-index: 3;
}

.hero-title {
    font-size: 40px;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 16px;
    color: var(--text-main);
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease forwards 0.2s;
}

.hero-badge {
    display: inline-block;
    background: linear-gradient(135deg, #ff4d4f, #ff7a45);
    color: #fff;
    padding: 4px 16px;
    font-weight: 700;
    font-size: 28px;
    border-radius: 4px;
    vertical-align: middle;
}

.hero-subtitle {
    font-size: 14px;
    color: #666;
    margin-bottom: 36px;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease forwards 0.4s;
}

.hero-actions {
    display: flex;
    gap: 16px;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease forwards 0.6s;
}

.btn-ghost {
    display: inline-flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    background: transparent;
    border: 1px solid #ccc;
    color: #333;
    padding: 12px 28px;
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
}

.btn-ghost:hover {
    border-color: var(--nav-blue);
    color: var(--nav-blue);
}

/* 轮播指示器 */
.hero-dots {
    display: flex;
    gap: 10px;
    margin-top: 32px;
    opacity: 0;
    animation: fadeInUp 0.8s ease forwards 0.8s;
}

.dot {
    width: 40px;
    height: 3px;
    background: #ccc;
    cursor: pointer;
    transition: var(--transition);
}

.dot.active {
    background: var(--nav-blue);
}

.dot:hover {
    background: var(--nav-blue);
}

/* Banner 右侧 SVG 插画 */
.hero-illustration {
    width: 550px;
    height: 400px;
    flex-shrink: 0;
    position: relative;
}

.hero-illustration svg {
    width: 100%;
    height: 100%;
}

/* ========== 快捷入口卡片 ========== */
.shortcuts-wrapper {
    position: relative;
    z-index: 10;
    max-width: 1200px;
    margin: -50px auto 0;
    padding: 0 20px;
}

.hero-shortcuts {
    background: #fff;
    box-shadow: 0 4px 24px rgba(0,0,0,0.08);
    border-radius: 4px;
    padding: 28px 0;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
}

.shortcut-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 8px 24px;
    border-right: 1px solid #eee;
    cursor: pointer;
    transition: var(--transition);
}

.shortcut-item:last-child {
    border-right: none;
}

.shortcut-item:hover {
    background: var(--bg-light-gray);
}

.shortcut-icon {
    font-size: 28px;
    color: var(--nav-blue);
    opacity: 0.6;
    width: 40px;
    text-align: center;
}

.shortcut-text h4 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 4px;
}

.shortcut-text p {
    font-size: 12px;
    color: #888;
    line-height: 1.4;
}

/* ========== 通用按钮 ========== */
.btn {
    display: inline-block;
    padding: 8px 24px;
    border-radius: 4px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    text-align: center;
    border: none;
}

.btn-primary {
    background-color: var(--primary-color);
    color: #fff;
    border: 1px solid var(--primary-color);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 82, 217, 0.3);
}

.btn-outline {
    background-color: transparent;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

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

/* ========== 通用区块样式 ========== */
.section {
    padding: 80px 0;
}

.section-bg-gray {
    background-color: var(--bg-light-gray);
}

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

.section-title {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 16px;
    color: var(--text-light);
}

.section-link {
    color: #ff4d4f;
    font-size: 14px;
}

.section-link:hover {
    text-decoration: underline;
}

/* ========== 产品展示区（标签页+卡片布局） ========== */
.product-showcase {
    padding: 80px 0 60px;
    background: #fff;
}

.product-tabs {
    display: flex;
    justify-content: center;
    gap: 0;
    margin-bottom: 48px;
    border-bottom: 1px solid var(--border-color);
}

.product-tab {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    padding: 16px 32px 20px;
    cursor: pointer;
    border-bottom: 3px solid transparent;
    transition: var(--transition);
    color: var(--text-regular);
    position: relative;
}

.product-tab:hover {
    color: var(--nav-blue);
}

.product-tab.active {
    color: var(--nav-blue);
    border-bottom-color: var(--nav-blue);
}

.product-tab .tab-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    opacity: 0.5;
    transition: var(--transition);
}

.product-tab.active .tab-icon,
.product-tab:hover .tab-icon {
    opacity: 1;
}

.product-tab .tab-label {
    font-size: 14px;
    font-weight: 500;
    white-space: nowrap;
}

/* 产品面板区域 */
.product-panel {
    display: none;
}

.product-panel.active {
    display: grid;
    grid-template-columns: 380px 1fr;
    gap: 0;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    overflow: hidden;
    animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* 左侧大卡片 */
.product-featured {
    background: #fff;
    padding: 40px 32px;
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.product-featured h3 {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-main);
}

.product-featured p {
    font-size: 14px;
    color: var(--text-regular);
    line-height: 1.8;
    margin-bottom: 32px;
}

.product-featured-actions {
    display: flex;
    gap: 16px;
    margin-top: auto;
}

.btn-orange {
    background: linear-gradient(135deg, #ff6a00, #ff4d4f);
    color: #fff;
    border: none;
    padding: 10px 28px;
    border-radius: 2px;
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
}

.btn-orange:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(255, 77, 79, 0.4);
}

.btn-outline-gray {
    background: transparent;
    color: var(--text-main);
    border: 1px solid #ccc;
    padding: 10px 28px;
    border-radius: 2px;
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
}

.btn-outline-gray:hover {
    border-color: var(--nav-blue);
    color: var(--nav-blue);
}

/* 右侧产品网格 */
.product-grid-right {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(2, 1fr);
}

.product-cell {
    padding: 24px;
    border-bottom: 1px solid var(--border-color);
    border-right: 1px solid var(--border-color);
    transition: var(--transition);
    cursor: pointer;
    position: relative;
}

.product-cell:nth-child(3n) {
    border-right: none;
}

.product-cell:nth-child(n+4) {
    border-bottom: none;
}

.product-cell:hover {
    background: #f8faff;
}

.product-cell h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-main);
}

.product-cell p {
    font-size: 13px;
    color: var(--text-light);
    line-height: 1.6;
}

/* HOT角标 */
.hot-badge {
    position: absolute;
    top: 0;
    right: 0;
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 0 48px 48px 0;
    border-color: transparent #ff4d4f transparent transparent;
}

.hot-badge span {
    position: absolute;
    top: 8px;
    right: -42px;
    color: #fff;
    font-size: 10px;
    font-weight: 700;
    transform: rotate(45deg);
}

/* ========== 卡片网格 ========== */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.card {
    background: var(--bg-white);
    border-radius: 8px;
    padding: 32px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
    cursor: pointer;
}

.card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-5px);
    border-color: transparent;
}

.card-icon {
    width: 48px;
    height: 48px;
    background-color: #f0f5ff;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    color: var(--primary-color);
    font-size: 24px;
    transition: var(--transition);
}

.card:hover .card-icon {
    background-color: var(--primary-color);
    color: #fff;
}

.card-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
}

.card-desc {
    font-size: 14px;
    color: var(--text-regular);
    line-height: 1.8;
}

/* ========== 新闻列表 ========== */
.news-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.news-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    transition: var(--transition);
}

.news-item:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-light);
}

.news-title {
    font-size: 16px;
    font-weight: 500;
}

.news-date {
    color: var(--text-light);
    font-size: 14px;
}

/* ========== 首页行业解决方案区块（深色背景） ========== */
.solutions-showcase {
    background: linear-gradient(rgba(44, 49, 64, 0.95), rgba(44, 49, 64, 0.95)),
                url('../images/solution-game.png');
    background-size: cover;
    background-position: center;
    padding: 80px 0;
    color: #fff;
    position: relative;
}

.solutions-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
}

.solutions-title {
    text-align: center;
    color: #fff;
    font-size: 32px;
    font-weight: 600;
    margin-bottom: 60px;
}

.solutions-content {
    display: flex;
    gap: 40px;
    align-items: flex-start;
}

.solutions-left {
    flex: 1;
    min-height: 400px;
}

.solution-detail {
    display: none;
    animation: fadeIn 0.5s ease;
}

.solution-detail.active {
    display: block;
}

.solution-detail h3 {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 24px;
    color: #fff;
}

.solution-detail p {
    font-size: 15px;
    color: rgba(255,255,255,0.85);
    line-height: 1.8;
    margin-bottom: 32px;
}

.solution-detail .related-label {
    font-size: 14px;
    color: rgba(255,255,255,0.7);
    margin-bottom: 16px;
}

.solution-actions {
    display: flex;
    gap: 16px;
    margin-top: 12px;
}

.btn-solution-tag {
    display: inline-block;
    padding: 10px 24px;
    border: 1px solid rgba(255,255,255,0.5);
    color: #fff;
    font-size: 14px;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
}

.btn-solution-tag:hover {
    border-color: #fff;
    background: rgba(255,255,255,0.15);
}

.btn-solution-more {
    display: inline-block;
    padding: 10px 28px;
    background: #e74c3c;
    color: #fff;
    font-size: 14px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
}

.btn-solution-more:hover {
    background: #c0392b;
    transform: translateY(-2px);
}

.solutions-right {
    width: 320px;
    background: rgba(255,255,255,0.08);
    backdrop-filter: blur(10px);
    border-radius: 8px;
    overflow: hidden;
}

.solution-menu-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 20px 24px;
    cursor: pointer;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    transition: all 0.3s;
    font-size: 15px;
    color: rgba(255,255,255,0.8);
}

.solution-menu-item:last-child {
    border-bottom: none;
}

.solution-menu-item:hover {
    background: rgba(255,255,255,0.12);
    color: #fff;
}

.solution-menu-item.active {
    background: rgba(255,255,255,0.15);
    color: #fff;
    border-left: 4px solid #e74c3c;
}

.solution-menu-icon {
    width: 24px;
    height: 24px;
    object-fit: contain;
}

/* ========== 基础设施区域（地图+特性+认证） ========== */
.infra-section {
    padding: 80px 0 0;
    background: var(--bg-light-gray);
}

.infra-section .section-title {
    text-align: center;
    margin-bottom: 48px;
}

/* 地图+左侧特性 */
.infra-map-layout {
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: 0;
    min-height: 400px;
    margin-bottom: 48px;
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow-light);
}

.infra-features {
    padding: 32px 28px;
    border-right: 1px solid var(--border-color);
}

.infra-feature-item {
    margin-bottom: 28px;
    padding-bottom: 28px;
    border-bottom: 1px solid var(--border-color);
}

.infra-feature-item:last-of-type {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.infra-feature-item h4 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 6px;
    color: var(--text-main);
}

.infra-feature-item p {
    font-size: 13px;
    color: var(--text-light);
}

.infra-legend {
    display: flex;
    gap: 24px;
    margin: 24px 0;
    font-size: 13px;
    color: var(--text-regular);
}

.legend-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    display: inline-block;
    margin-right: 6px;
    vertical-align: middle;
}

.legend-dot.red { background: #e74c3c; }
.legend-dot.gray { background: #999; }

.btn-red-full {
    display: block;
    width: 100%;
    padding: 12px;
    background: #e74c3c;
    color: #fff;
    text-align: center;
    font-size: 14px;
    border: none;
    border-radius: 2px;
    cursor: pointer;
    transition: var(--transition);
}

.btn-red-full:hover {
    background: #c0392b;
}

/* 右侧地图 */
.infra-map {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 10px;
    overflow: hidden;
    border-radius: 4px;
}

.infra-map-img {
    width: 100%;
    max-width: 100%;
    height: auto;
    display: block;
}

/* 数据统计条 */
.infra-stats {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 0;
    background: #fff;
    padding: 32px 0;
    margin-bottom: 0;
}

.stat-item {
    text-align: center;
    border-right: 1px solid var(--border-color);
    padding: 0 16px;
}

.stat-item:last-child {
    border-right: none;
}

.stat-number {
    font-size: 36px;
    font-weight: 700;
    color: var(--nav-blue);
    line-height: 1;
    margin-bottom: 8px;
}

.stat-number sup {
    font-size: 18px;
    font-weight: 400;
}

.stat-label {
    font-size: 13px;
    color: var(--text-light);
}

/* 认证条 */
.infra-certs {
    display: flex;
    justify-content: center;
    gap: 60px;
    padding: 48px 0;
    background: linear-gradient(180deg, #f0f0f0 0%, #fff 100%);
}

.cert-item {
    text-align: center;
}

.cert-icon {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: #fff;
    box-shadow: 0 2px 12px rgba(0,0,0,0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 12px;
    font-size: 24px;
    color: #e74c3c;
}

.cert-item h5 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 4px;
}

.cert-item p {
    font-size: 12px;
    color: var(--text-light);
}

/* ========== 最新动态 ========== */
.news-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    background: #fff;
    border: 1px solid #eee;
    border-radius: 4px;
    overflow: hidden;
}

.news-featured {
    padding: 36px 40px;
    border-right: 1px solid #eee;
}

.news-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.news-tag {
    color: #1a6fb5;
    font-size: 13px;
    font-weight: 500;
}

.news-tag.tag-product {
    color: #1a6fb5;
}

.news-date-label {
    color: #999;
    font-size: 13px;
}

.news-date-label::before {
    content: '|';
    margin-right: 12px;
    color: #ddd;
}

.news-featured-title {
    font-size: 20px;
    font-weight: 700;
    line-height: 1.5;
    margin-bottom: 16px;
}

.news-featured-title a {
    color: var(--text-dark);
    text-decoration: none;
    transition: color 0.2s;
}

.news-featured-title a:hover {
    color: #1a6fb5;
}

.news-featured-desc {
    font-size: 14px;
    line-height: 1.8;
    color: #666;
}

.news-list-right {
    display: flex;
    flex-direction: column;
}

.news-list-item {
    padding: 28px 36px;
    border-bottom: 1px solid #eee;
    transition: background 0.2s;
}

.news-list-item:last-child {
    border-bottom: none;
}

.news-list-item:hover {
    background: #f8f9fa;
}

.news-list-item h4 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 8px;
    line-height: 1.4;
}

.news-list-item h4 a {
    color: var(--text-dark);
    text-decoration: none;
    transition: color 0.2s;
}

.news-list-item h4 a:hover {
    color: #1a6fb5;
}

.news-list-item p {
    font-size: 13px;
    color: #888;
    line-height: 1.6;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.news-more {
    text-align: center;
    padding: 40px 0 10px;
}

.btn-view-more {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 48px;
    border: 1px solid #ddd;
    color: #333;
    font-size: 14px;
    text-decoration: none;
    transition: all 0.2s;
    border-radius: 2px;
}

.btn-view-more:hover {
    border-color: #1a6fb5;
    color: #1a6fb5;
}

.btn-view-more i {
    font-size: 12px;
}

/* ========== 解决方案独立页 ========== */
.sol-banner {
    position: relative;
    background: #2a2a2a;
    color: #fff;
    padding: 120px 0 60px;
    overflow: hidden;
}

.sol-banner-bg {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    width: 50%;
    background: linear-gradient(135deg, rgba(0,0,0,0.3) 0%, rgba(0,0,0,0.6) 100%);
    background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 400 300"><rect fill="%23333" width="400" height="300"/><rect fill="%23444" x="50" y="30" width="120" height="80" rx="4"/><rect fill="%23555" x="60" y="45" width="100" height="8" rx="2"/><rect fill="%23555" x="60" y="60" width="80" height="8" rx="2"/><rect fill="%23555" x="60" y="75" width="90" height="8" rx="2"/><rect fill="%23444" x="220" y="50" width="150" height="200" rx="4"/><rect fill="%23555" x="235" y="70" width="120" height="6" rx="2"/><rect fill="%23555" x="235" y="85" width="100" height="6" rx="2"/><rect fill="%23555" x="235" y="100" width="110" height="6" rx="2"/></svg>');
    background-size: cover;
    opacity: 0.3;
}

.sol-banner-content {
    position: relative;
    z-index: 1;
    max-width: 700px;
}

.sol-banner-content h1 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 24px;
    line-height: 1.3;
}

.sol-banner-content p {
    font-size: 15px;
    line-height: 2;
    color: rgba(255,255,255,0.85);
    margin-bottom: 32px;
}

.sol-btn {
    display: inline-block;
    padding: 12px 36px;
    background: #e74c3c;
    color: #fff;
    font-size: 15px;
    text-decoration: none;
    border-radius: 2px;
    transition: background 0.2s;
}

.sol-btn:hover {
    background: #c0392b;
}

/* Tab 导航条 */
.sol-tabs-wrapper {
    background: #fff;
    border-bottom: 1px solid #eee;
    position: sticky;
    top: 60px;
    z-index: 90;
}

.sol-tabs {
    display: flex;
}

.sol-tab {
    padding: 20px 0;
    margin-right: 80px;
    font-size: 16px;
    color: #666;
    cursor: pointer;
    border-bottom: 3px solid transparent;
    transition: all 0.2s;
}

.sol-tab:hover {
    color: #e74c3c;
}

.sol-tab.active {
    color: #e74c3c;
    border-bottom-color: #e74c3c;
}

/* 内容区 */
.sol-content {
    padding: 60px 0 80px;
    background: #f8f9fa;
}

.sol-panel {
    display: block;
    padding-top: 20px;
}

.sol-panel:first-child {
    padding-top: 0;
}

.sol-panel-title {
    font-size: 28px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 50px;
    color: var(--text-dark);
}

/* ====== 市场现状/痛点 - 左边框列表样式 ====== */
.sol-market-section {
    max-width: 900px;
    margin: 0 auto;
}

.sol-market-item {
    padding: 24px 0 24px 20px;
    border-left: 3px solid #e74c3c;
    margin-bottom: 32px;
}

.sol-market-item h4 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.sol-market-item p {
    font-size: 14px;
    line-height: 1.9;
    color: #666;
}

/* ====== 架构部署 - 图文混排布局 ====== */
.sol-arch-section {
    display: grid;
    grid-template-columns: 1fr 420px;
    gap: 48px;
    align-items: start;
    background: #fff;
    border-radius: 8px;
    padding: 40px;
    box-shadow: var(--shadow-light);
}

/* 左侧架构图区域 */
.sol-arch-diagram {
    background: linear-gradient(145deg, #fafbfc 0%, #f0f2f5 100%);
    border-radius: 8px;
    padding: 32px;
    min-height: 480px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.arch-layer {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
}

.arch-block {
    background: #fff;
    border: 1.5px solid #e0e0e0;
    border-radius: 6px;
    padding: 12px 16px;
    text-align: center;
    min-width: 100px;
    transition: all 0.2s;
    cursor: default;
}

.arch-block:hover {
    border-color: #e74c3c;
    box-shadow: 0 2px 12px rgba(231,76,60,0.15);
}

.arch-block .block-icon {
    font-size: 24px;
    color: #e74c3c;
    margin-bottom: 6px;
}

.arch-block .block-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-dark);
}

.arch-block .block-desc {
    font-size: 11px;
    color: #999;
    margin-top: 2px;
}

.arch-label {
    font-size: 11px;
    color: #999;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-right: 8px;
    padding-top: 8px;
}

.arch-arrow-down {
    text-align: center;
    color: #ccc;
    font-size: 18px;
    margin: 4px 0;
}

/* 右侧特性面板 */
.sol-arch-info {
    padding-left: 10px;
}

.sol-arch-info h3 {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 16px;
    padding-bottom: 14px;
    border-bottom: 1px solid #eee;
}

.sol-arch-info > p {
    font-size: 14px;
    line-height: 1.8;
    color: #666;
    margin-bottom: 28px;
}

.arch-feature-group {
    margin-bottom: 26px;
}

.arch-feature-group h5 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.arch-check-list {
    list-style: none;
    padding: 0;
}

.arch-check-list li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 14px;
    color: #555;
    line-height: 1.7;
    margin-bottom: 8px;
}

.arch-check-list li i {
    color: #27ae60;
    font-size: 14px;
    margin-top: 4px;
    flex-shrink: 0;
}

.sol-arch-cta {
    display: inline-block;
    padding: 13px 42px;
    background: #e74c3c;
    color: #fff;
    font-size: 15px;
    font-weight: 500;
    border-radius: 2px;
    text-decoration: none;
    transition: background 0.2s;
    margin-top: 10px;
}

.sol-arch-cta:hover {
    background: #c0392b;
}

/* ====== 服务优势卡片网格（底部） ====== */
.sol-advantage-section {
    margin-top: 70px;
}

.sol-advantage-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 36px;
}

.advantage-card {
    text-align: center;
    padding: 36px 20px;
}

.advantage-icon-wrap {
    width: 88px;
    height: 88px;
    margin: 0 auto 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 40px;
}

.advantage-icon-red { color: #e74c3c; }
.advantage-icon-blue { color: #0052d9; }

.advantage-card h4 {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.advantage-card p {
    font-size: 13px;
    line-height: 1.8;
    color: #777;
}

/* ====== 原有卡片网格保留（兼容） ====== */
.sol-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.sol-card {
    background: #fff;
    padding: 40px 28px;
    text-align: center;
    border-radius: 4px;
    transition: box-shadow 0.2s;
}

.sol-card:hover {
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}

.sol-card-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
    color: #e74c3c;
}

.sol-card h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-dark);
}

.sol-card p {
    font-size: 14px;
    line-height: 1.8;
    color: #666;
}

/* ========== Footer ========== */
.footer {
    background-color: var(--bg-dark);
    color: #fff;
    padding: 60px 0 20px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    margin-bottom: 40px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    padding-bottom: 40px;
}

.footer-col h4 {
    font-size: 16px;
    font-weight: 500;
    margin-bottom: 20px;
    color: rgba(255,255,255,0.8);
}

.footer-col ul li {
    margin-bottom: 12px;
}

.footer-col ul li a {
    color: rgba(255,255,255,0.5);
    font-size: 14px;
}

.footer-col ul li a:hover {
    color: #fff;
}

.footer-bottom {
    text-align: center;
    color: rgba(255,255,255,0.4);
    font-size: 12px;
}

/* ========== 动画 ========== */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.animate-on-scroll.is-visible {
    opacity: 1;
    transform: translateY(0);
}

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

@keyframes float {
    0% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
    100% { transform: translateY(0); }
}

@keyframes floatSlow {
    0% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-10px) rotate(2deg); }
    100% { transform: translateY(0) rotate(0deg); }
}

/* ========== 帮助文档页面 ========== */
.help-hero {
    background: linear-gradient(135deg, #f0f4fa 0%, #e8eef8 50%, #f5f7fb 100%);
    padding: 100px 0 60px;
    position: relative;
    overflow: hidden;
}

.help-hero::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="120" height="120"><rect fill="%23e8ecf2" width="40" height="40" x="10" y="10" rx="4" opacity=".4"/><rect fill="%23dfe4ed" width="30" height="30" x="70" y="20" rx="4" opacity=".3"/><rect fill="%23e1e6ee" width="24" height="24" x="35" y="65" rx="4" opacity=".35"/><rect fill="%23dbe1eb" width="36" height="36" x="75" y="75" rx="4" opacity=".25"/></svg>');
    background-size: 200px 200px;
    opacity: .6;
}

.help-hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
}

.help-hero h1 {
    font-size: 34px;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 36px;
}

/* 搜索栏 */
.help-search-bar {
    display: flex;
    max-width: 680px;
    margin: 0 auto 16px;
    background: #fff;
    border-radius: 4px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    overflow: hidden;
}

.help-search-bar input {
    flex: 1;
    border: none;
    outline: none;
    padding: 16px 24px;
    font-size: 14px;
    color: var(--text-main);
}

.help-search-bar input::placeholder {
    color: #bbb;
}

.help-search-btn {
    padding: 0 40px;
    background: #e74c3c;
    color: #fff;
    border: none;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s;
    white-space: nowrap;
}

.help-search-btn:hover {
    background: #c0392b;
}

/* 热搜关键词 */
.help-hot-keys {
    font-size: 13px;
    color: var(--text-light);
    margin-top: 12px;
}

.help-hot-keys span {
    margin-right: 6px;
}

.help-hot-keys a {
    color: #e74c3c;
    margin-right: 14px;
    transition: opacity 0.2s;
}

.help-hot-keys a:hover {
    opacity: 0.7;
    text-decoration: underline;
}

/* 帮助文档Tab导航 */
.help-tabs-wrapper {
    background: #fff;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 60px;
    z-index: 90;
}

.help-tabs {
    display: flex;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.help-tab {
    padding: 18px 0;
    margin-right: 56px;
    font-size: 15px;
    color: #666;
    cursor: pointer;
    border-bottom: 3px solid transparent;
    transition: all 0.2s;
    position: relative;
}

.help-tab:hover {
    color: #e74c3c;
}

.help-tab.active {
    color: #e74c3c;
    border-bottom-color: #e74c3c;
    font-weight: 500;
}

/* 帮助文档描述 */
.help-desc {
    max-width: 1200px;
    margin: 0 auto;
    padding: 24px 20px 0;
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.8;
}

/* 文档分类网格 */
.help-docs-section {
    padding: 48px 0 80px;
    background: #fff;
}

.help-docs-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px 40px;
}

.help-doc-category h3 {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 17px;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 20px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--border-color);
}

.help-doc-category h3 i {
    font-size: 20px;
    color: var(--nav-blue);
    width: 22px;
    text-align: center;
}

.help-doc-list li {
    margin-bottom: 10px;
}

.help-doc-list li a {
    display: block;
    padding: 8px 12px;
    font-size: 14px;
    color: #555;
    border-radius: 4px;
    transition: all 0.2s;
}

.help-doc-list li a:hover {
    background: #f5f7fb;
    color: var(--nav-blue);
}

/* ========== 新闻中心 / 公告中心 通用样式 ========== */
.news-hero {
    background: linear-gradient(135deg, #2a2a2a 0%, #1e222d 100%);
    color: #fff;
    padding: 110px 0 60px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.news-hero::before {
    content: '';
    position: absolute;
    top: -50%; right: -20%;
    width: 500px;
    height: 500px;
    border-radius: 50%;
    background: rgba(0,82,217,0.06);
}

.news-hero h1 {
    font-size: 34px;
    font-weight: 700;
    margin-bottom: 12px;
    position: relative;
    z-index: 1;
}

.news-hero p {
    font-size: 15px;
    color: rgba(255,255,255,0.65);
    position: relative;
    z-index: 1;
}

/* Tab 导航（新闻/公告共用） */
.news-tabs-wrapper {
    background: #fff;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 60px;
    z-index: 90;
}

.news-tabs {
    display: flex;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    gap: 0;
}

.news-tab-item {
    padding: 18px 28px;
    font-size: 15px;
    color: #666;
    cursor: pointer;
    border-bottom: 3px solid transparent;
    transition: all 0.2s;
}

.news-tab-item:hover {
    color: var(--nav-blue);
}

.news-tab-item.active {
    color: var(--nav-blue);
    border-bottom-color: var(--nav-blue);
    font-weight: 500;
}

/* 新闻列表主体 */
.news-body-section {
    padding: 40px 0 80px;
    background: var(--bg-light-gray);
    min-height: 500px;
}

.news-article-list {
    max-width: 900px;
    margin: 0 auto;
}

.news-article-item {
    background: #fff;
    border-radius: 4px;
    padding: 28px 32px;
    margin-bottom: 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 24px;
    transition: all 0.2s;
    border: 1px solid transparent;
}

.news-article-item:hover {
    box-shadow: 0 4px 16px rgba(0,0,0,0.07);
    border-color: #eee;
}

.article-info-left {
    flex: 1;
    min-width: 0;
}

.article-tag {
    display: inline-block;
    font-size: 11px;
    color: #fff;
    background: var(--nav-blue);
    padding: 2px 10px;
    border-radius: 2px;
    margin-right: 8px;
    font-weight: 500;
    vertical-align: middle;
}

.article-tag.tag-red { background: #e74c3c; }
.article-tag.tag-green { background: #27ae60; }
.article-tag.tag-orange { background: #f39c12; }

.article-title-link {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-main);
    line-height: 1.5;
    display: inline;
    vertical-align: middle;
    transition: color 0.2s;
}

.news-article-item:hover .article-title-link {
    color: var(--nav-blue);
}

.article-summary {
    font-size: 13px;
    color: var(--text-light);
    margin-top: 8px;
    line-height: 1.7;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.article-meta-right {
    text-align: right;
    flex-shrink: 0;
    min-width: 90px;
}

.article-date {
    font-size: 13px;
    color: var(--text-light);
    margin-bottom: 4px;
}

/* 分页 */
.news-pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 6px;
    margin-top: 40px;
    padding-top: 20px;
}

.page-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    padding: 0 12px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 13px;
    color: #555;
    cursor: pointer;
    transition: all 0.2s;
    background: #fff;
}

.page-btn:hover {
    border-color: var(--nav-blue);
    color: var(--nav-blue);
}

.page-btn.active {
    background: var(--nav-blue);
    border-color: var(--nav-blue);
    color: #fff;
}

.page-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* 公告卡片样式变体 */
.notice-card-item {
    background: #fff;
    border-radius: 4px;
    padding: 28px 32px;
    margin-bottom: 16px;
    border-left: 4px solid #e74c3c;
    transition: all 0.2s;
}

.notice-card-item:hover {
    box-shadow: 0 4px 16px rgba(0,0,0,0.08);
}

.notice-card-item.notice-type-maintain { border-left-color: #f39c12; }
.notice-card-item.notice-type-update { border-left-color: var(--nav-blue); }
.notice-card-item.notice-type-event { border-left-color: #27ae60; }

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

.notice-badge {
    font-size: 11px;
    color: #fff;
    padding: 2px 10px;
    border-radius: 2px;
    font-weight: 500;
}

.notice-badge.badge-important { background: #e74c3c; }
.notice-badge.badge-maintain { background: #f39c12; }
.notice-badge.badge-update { background: var(--nav-blue); }
.notice-badge.badge-event { background: #27ae60; }

.notice-title-text {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-main);
    transition: color 0.2s;
    cursor: pointer;
}

.notice-card-item:hover .notice-title-text {
    color: var(--nav-blue);
}

.notice-date-label {
    font-size: 13px;
    color: var(--text-light);
}

.notice-body-text {
    font-size: 14px;
    color: #666;
    line-height: 1.8;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

/* 响应式补充 */
@media (max-width: 1024px) {
    .help-docs-grid { grid-template-columns: repeat(2, 1fr); }
    .sol-advantage-grid { grid-template-columns: repeat(2, 1fr); }
    .sol-arch-section { grid-template-columns: 1fr; }
    .infra-stats { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
    .hero-illustration {
        display: none;
    }
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .hero-title {
        font-size: 28px;
    }
    .nav-menu {
        display: none;
    }
    .hero-shortcuts {
        grid-template-columns: repeat(2, 1fr);
    }
    .shortcut-item {
        border-bottom: 1px solid #eee;
    }
    .nav-search {
        display: none;
    }
    .nav-right-links {
        gap: 10px;
        font-size: 12px;
    }
    .help-docs-grid { grid-template-columns: 1fr; }
    .news-article-item { flex-direction: column; align-items: flex-start; }
    .article-meta-right { text-align: left; width: 100%; display: flex; justify-content: space-between; }
}