/* ============================================
   基础样式与变量定义
   ============================================ */
.container {
    width: 1220px;
    margin: 0 auto;
}

/* 红色主题变量 */
:root {
    --primary-color: #e74c3c;
    --primary-dark: #c0392b;
    --primary-light: #ff6b6b;
    --secondary-color: #2c3e50;
    --text-color: #333;
    --text-light: #666;
    --bg-light: #f9f9f9;
    --border-color: #e0e0e0;
    --success-color: #27ae60;
    --warning-color: #f39c12;
    --shadow-light: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-medium: 0 8px 25px rgba(0, 0, 0, 0.12);
    --shadow-heavy: 0 12px 35px rgba(0, 0, 0, 0.15);
}

/* ============================================
   Banner区域
   ============================================ */
.security-banner {
    height: 490px;
    position: relative;
    background: linear-gradient(rgba(231, 76, 60, 0.9), rgba(192, 57, 43, 0.9));
    background-size: cover;
    color: white;
}

.security-banner .header-info {
    width: 660px;
    padding-top: 160px;
    overflow: hidden;
}

.security-banner .header-info h1 {
    font-size: 36px;
    margin: 0 0 30px;
    color: white;
    font-weight: 600;
    line-height: 1.2;
}

.security-banner .header-info p {
    line-height: 24px;
    margin: 0 0 65px;
    overflow: hidden;
    color: rgba(255, 255, 255, 0.9);
    font-size: 16px;
}

.security-banner .header-info a {
    display: block;
    width: 178px;
    height: 38px;
    border: 2px solid white;
    line-height: 34px;
    text-align: center;
    color: white;
    font-size: 16px;
    background: transparent;
    transition: all 0.3s ease;
    border-radius: 4px;
    font-weight: 500;
    text-decoration: none;
}

.security-banner .header-info a:hover {
    background: white;
    color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 255, 255, 0.3);
}

/* ============================================
   移动端导航
   ============================================ */
.mobile-nav {
    display: none;
    padding: 15px 20px;
    background: white;
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.mobile-nav-select {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid var(--primary-color);
    border-radius: 6px;
    font-size: 16px;
    color: var(--secondary-color);
    background: white;
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23e74c3c' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 15px center;
    background-size: 20px;
    cursor: pointer;
    font-weight: 500;
}

.mobile-nav-select:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(231, 76, 60, 0.2);
}

/* ============================================
   桌面导航栏
   ============================================ */
.cloumn-blank {
    display: none;
    height: 100px;
    overflow: hidden;
}

.security-cloumn {
    background: white;
    border-bottom: 1px solid var(--border-color);
    overflow: hidden;
    min-width: 1220px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: relative;
    z-index: 1000;
}

.security-cloumn ul {
    width: 1220px;
    margin: 0 auto;
    text-align: center;
    height: 99px;
    overflow: hidden;
    padding: 0;
}

.security-cloumn ul li {
    float: left;
    width: calc(100% / 7);
    line-height: 96px;
    font-size: 16px;
    border-bottom: 3px solid transparent;
    cursor: pointer;
    transition: all 0.3s ease;
    color: var(--text-light);
    font-weight: 500;
    list-style: none;
}

.security-cloumn ul li:hover {
    color: var(--primary-color);
    background-color: rgba(231, 76, 60, 0.05);
}

.security-cloumn ul .active {
    border-bottom: 3px solid var(--primary-color);
    color: var(--primary-color);
    font-weight: 600;
}

/* ============================================
   通用标题样式
   ============================================ */
.security-title {
    font-size: 36px;
    text-align: center;
    margin: 0 0 75px;
    overflow: hidden;
    color: var(--secondary-color);
    font-weight: 600;
    padding-top: 20px;
    line-height: 1.2;
}

.security-title span {
    display: block;
    font-size: 16px;
    color: var(--text-light);
    margin: 25px 0 0;
    line-height: 1.6;
    font-weight: 400;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.security-title a {
    color: var(--primary-color);
    margin: 0 5px;
    text-decoration: none;
    font-weight: 500;
}

.security-title a:hover {
    text-decoration: underline;
}

.security-title em {
    color: var(--primary-color);
    margin: 0 5px;
    font-style: normal;
    font-weight: 600;
}

/* ============================================
   通用按钮样式
   ============================================ */
.security-btns {
    clear: both;
    text-align: center;
    padding: 50px 0;
    overflow: hidden;
}

.security-btns a {
    display: inline-block;
    font-size: 16px;
    width: 200px;
    height: 44px;
    line-height: 44px;
    margin: 0 15px;
    color: white;
    border-radius: 4px;
    transition: all 0.3s ease;
    text-decoration: none;
    font-weight: 500;
    box-shadow: var(--shadow-light);
    border: 2px solid transparent;
}

.security-btns .btn1 {
    background: var(--primary-color);
    border-color: var(--primary-color);
}

.security-btns .btn1:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: var(--shadow-medium);
}

.security-btns .btn2 {
    background: white;
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.security-btns .btn2:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-3px);
    box-shadow: var(--shadow-medium);
}

/* ============================================
   时间轴流程样式（完整修复版）
   ============================================ */
.security-list {
    overflow: hidden;
    margin: 50px 0;
    padding: 0;
    position: relative;
}

.security-list li {
    float: left;
    text-align: center;
    position: relative;
    width: 25%;
    box-sizing: border-box;
    padding: 0 15px;
    list-style: none;
    z-index: 2;
}

/* 流程图标容器 */
.security-list li:before {
    content: "";
    width: 60px;
    height: 60px;
    display: block;
    margin: 0 auto 20px;
    background-color: white;
    border-radius: 50%;
    box-shadow: var(--shadow-light);
    border: 2px solid var(--primary-color);
    position: relative;
    z-index: 3;
    transition: all 0.3s ease;
}

.security-list li:hover:before {
    transform: scale(1.1);
    box-shadow: var(--shadow-medium);
    background-color: var(--primary-color);
    color: white;
}

/* SLA模块流程图标 */
.security-sla .security-list .item1:before {
    content: "1";
    line-height: 56px;
    font-size: 24px;
    font-weight: bold;
    color: var(--primary-color);
}

.security-sla .security-list .item2:before {
    content: "2";
    line-height: 56px;
    font-size: 24px;
    font-weight: bold;
    color: var(--primary-color);
}

.security-sla .security-list .item3:before {
    content: "3";
    line-height: 56px;
    font-size: 24px;
    font-weight: bold;
    color: var(--primary-color);
}

.security-sla .security-list .item4:before {
    content: "4";
    line-height: 56px;
    font-size: 24px;
    font-weight: bold;
    color: var(--primary-color);
}

.security-sla .security-list li:hover:before {
    color: white;
}

/* 售后模块流程图标 */
.security-refund .security-list .item1:before {
    content: "1";
    line-height: 56px;
    font-size: 24px;
    font-weight: bold;
    color: var(--primary-color);
}

.security-refund .security-list .item2:before {
    content: "2";
    line-height: 56px;
    font-size: 24px;
    font-weight: bold;
    color: var(--primary-color);
}

.security-refund .security-list .item3:before {
    content: "3";
    line-height: 56px;
    font-size: 24px;
    font-weight: bold;
    color: var(--primary-color);
}

.security-refund .security-list .item4:before {
    content: "4";
    line-height: 56px;
    font-size: 24px;
    font-weight: bold;
    color: var(--primary-color);
}

.security-refund .security-list li:hover:before {
    color: white;
}

/* 备案模块流程图标 */
.security-beian .security-list .item1:before {
    content: "1";
    line-height: 56px;
    font-size: 24px;
    font-weight: bold;
    color: var(--primary-color);
}

.security-beian .security-list .item2:before {
    content: "2";
    line-height: 56px;
    font-size: 24px;
    font-weight: bold;
    color: var(--primary-color);
}

.security-beian .security-list .item3:before {
    content: "3";
    line-height: 56px;
    font-size: 24px;
    font-weight: bold;
    color: var(--primary-color);
}

.security-beian .security-list .item4:before {
    content: "4";
    line-height: 56px;
    font-size: 24px;
    font-weight: bold;
    color: var(--primary-color);
}

.security-beian .security-list li:hover:before {
    color: white;
}

.security-list h5 {
    font-size: 16px;
    font-weight: 600;
    color: var(--secondary-color);
    margin: 0;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1.4;
    padding: 0 5px;
}

/* 连接线样式 */
.security-list p {
    margin: 0;
    height: 30px;
    position: relative;
}

.security-list p:before,
.security-list p:after {
    content: "";
    position: absolute;
    top: 50%;
    height: 3px;
    background: linear-gradient(to right, var(--primary-light), var(--primary-color));
    transform: translateY(-50%);
    z-index: 1;
    border-radius: 3px;
}

.security-list p:before {
    left: 0;
    right: calc(50% + 35px);
}

.security-list p:after {
    right: 0;
    left: calc(50% + 35px);
}

/* 第一个和最后一个步骤的连接线处理 */
.security-list .item1 p:before {
    display: none;
}

.security-list .item4 p:after {
    display: none;
}

/* ============================================
   问题解答样式
   ============================================ */
.security-problems {
    overflow: hidden;
    margin-top: 60px;
    background: var(--bg-light);
    padding: 40px;
    border-radius: 8px;
    box-shadow: var(--shadow-light);
}

.security-problems h3 {
    height: auto;
    line-height: 1.4;
    font-size: 20px;
    margin: 0 0 30px;
    overflow: hidden;
    color: var(--secondary-color);
    position: relative;
    padding-left: 40px;
    font-weight: 600;
}

.security-problems h3:before {
    content: '?';
    width: 32px;
    height: 32px;
    display: inline-block;
    vertical-align: middle;
    margin-right: 10px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    text-align: center;
    line-height: 32px;
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    font-weight: bold;
    font-size: 18px;
}

.security-problems dl {
    margin: 0 0 15px;
    cursor: pointer;
    overflow: hidden;
    border-radius: 6px;
    transition: all 0.3s ease;
}

.security-problems dl:hover {
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.security-problems dt {
    border: 1px solid var(--border-color);
    padding: 0 20px;
    background: white;
    color: var(--text-color);
    height: 56px;
    line-height: 56px;
    overflow: hidden;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
    padding-left: 60px;
    border-radius: 6px 6px 0 0;
}

.security-problems dt:before {
    content: 'Q';
    width: 36px;
    height: 36px;
    display: inline-block;
    vertical-align: middle;
    margin-right: 15px;
    background: var(--primary-light);
    color: white;
    border-radius: 50%;
    text-align: center;
    line-height: 36px;
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    font-weight: bold;
}

.security-problems dt:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background-color: rgba(231, 76, 60, 0.05);
}

.security-problems dd {
    display: none;
    border: 1px solid var(--border-color);
    border-top: none;
    padding: 25px 30px;
    background: white;
    animation: fadeIn 0.5s ease;
    overflow: hidden;
    border-radius: 0 0 6px 6px;
}

.security-problems dd h4 {
    font-size: 16px;
    line-height: 24px;
    font-weight: 600;
    margin: 0 0 16px;
    overflow: hidden;
    color: var(--secondary-color);
    position: relative;
    padding-left: 35px;
}

.security-problems dd h4:before {
    content: 'A';
    width: 28px;
    height: 28px;
    display: inline-block;
    vertical-align: middle;
    margin-right: 15px;
    background: var(--success-color);
    color: white;
    border-radius: 50%;
    text-align: center;
    line-height: 28px;
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    font-weight: bold;
}

.security-problems dd p {
    line-height: 26px;
    color: var(--text-light);
    margin: 10px 0;
    padding-left: 35px;
}

.security-problems .active dt {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    border-radius: 6px 6px 0 0;
}

.security-problems .active dt:before {
    background: white;
    color: var(--primary-color);
}

.security-problems .active dd {
    display: block;
}

@keyframes fadeIn {
    0% { opacity: 0; transform: translateY(-10px); }
    100% { opacity: 1; transform: translateY(0); }
}

/* ============================================
   模块通用样式
   ============================================ */
.security-stype {
    clear: both;
    overflow: hidden;
    margin: 50px 0;
}

.security-stype h3 {
    height: auto;
    line-height: 1.4;
    font-size: 20px;
    margin: 0 0 20px;
    overflow: hidden;
    color: var(--secondary-color);
    font-weight: 600;
    padding-left: 35px;
    position: relative;
}

.security-stype h3:before {
    content: '✓';
    width: 28px;
    height: 28px;
    display: inline-block;
    vertical-align: middle;
    margin-right: 10px;
    background: var(--success-color);
    color: white;
    border-radius: 50%;
    text-align: center;
    line-height: 28px;
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    font-weight: bold;
}

.security-stype ul {
    margin: 0;
    overflow: hidden;
    display: flex;
    justify-content: center;
    gap: 30px;
    padding: 0;
}

.security-stype ul li {
    list-style: none;
    flex: 1;
    max-width: 360px;
    border: 1px solid var(--border-color);
    background: white;
    text-align: center;
    padding: 40px 25px;
    overflow: hidden;
    box-sizing: border-box;
    border-radius: 8px;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-light);
}

.security-stype ul li:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-medium);
    transform: translateY(-5px);
}

.security-stype ul li:before {
    content: "";
    display: block;
    width: 80px;
    height: 80px;
    margin: 0 auto 25px;
    background: var(--primary-color);
    border-radius: 50%;
    color: white;
    font-size: 36px;
    line-height: 80px;
    box-shadow: 0 4px 12px rgba(231, 76, 60, 0.3);
}

.security-stype .item1:before { content: "1"; font-weight: bold; }
.security-stype .item2:before { content: "2"; font-weight: bold; }
.security-stype .item3:before { content: "3"; font-weight: bold; }

.security-stype ul h4 {
    font-size: 20px;
    margin: 0 0 15px;
    color: var(--secondary-color);
    font-weight: 600;
}

.security-stype ul p {
    line-height: 24px;
    color: var(--text-light);
    height: auto;
    min-height: 72px;
    margin: 0;
    font-size: 15px;
}

/* ============================================
   1. SLA模块
   ============================================ */
.security-sla {
    padding: 95px 0 70px;
    overflow: hidden;
    min-width: 1220px;
    background: white;
}

.sla-levels {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin: 50px 0;
}

.sla-item {
    text-align: center;
    padding: 35px 25px;
    background: white;
    border-radius: 10px;
    box-shadow: var(--shadow-light);
    transition: all 0.3s ease;
    flex: 1;
    max-width: 300px;
    border-top: 4px solid var(--primary-color);
}

.sla-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
}

.sla-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: var(--primary-color);
    border-radius: 50%;
    position: relative;
    box-shadow: 0 4px 12px rgba(231, 76, 60, 0.3);
}

.sla-icon-network:before { 
    content: "🌐";
    font-size: 24px;
    font-weight: bold;
    line-height: 80px;
    display: block;
    color: white;
}

.sla-icon-power:before { 
    content: "⚡";
    font-size: 24px;
    font-weight: bold;
    line-height: 80px;
    display: block;
    color: white;
}

.sla-icon-hardware:before { 
    content: "🛠️";
    font-size: 24px;
    font-weight: bold;
    line-height: 80px;
    display: block;
    color: white;
}

.sla-item h3 {
    font-size: 20px;
    color: var(--secondary-color);
    margin: 0 0 15px;
    font-weight: 600;
}

.sla-value {
    font-size: 36px;
    font-weight: bold;
    color: var(--primary-color);
    margin: 10px 0;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.sla-desc {
    color: var(--text-light);
    font-size: 15px;
    line-height: 1.5;
    margin: 0;
}

/* ============================================
   2. 售后保障政策
   ============================================ */
.security-refund {
    padding: 95px 0 70px;
    overflow: hidden;
    min-width: 1220px;
    background: var(--bg-light);
}

/* ============================================
   3. 技术支持体系
   ============================================ */
.security-support {
    padding: 95px 0;
    overflow: hidden;
    min-width: 1220px;
    background: white;
}

.support-levels {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin: 50px 0 70px;
}

.level-item {
    text-align: center;
    padding: 35px 25px;
    background: white;
    border-radius: 10px;
    box-shadow: var(--shadow-light);
    flex: 1;
    max-width: 320px;
    border-top: 4px solid var(--primary-color);
    transition: all 0.3s ease;
}

.level-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
}

.level-number {
    width: 50px;
    height: 50px;
    margin: 0 auto 20px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    font-size: 24px;
    font-weight: bold;
    line-height: 50px;
    box-shadow: 0 4px 8px rgba(231, 76, 60, 0.3);
}

.level-item h4 {
    font-size: 20px;
    color: var(--secondary-color);
    margin: 0 0 15px;
    font-weight: 600;
}

.response-time {
    font-size: 22px;
    font-weight: bold;
    color: var(--primary-color);
    margin: 15px 0;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.level-item p {
    color: var(--text-light);
    font-size: 15px;
    line-height: 1.5;
    margin: 0;
}

.contact-channels {
    display: flex;
    justify-content: center;
    gap: 25px;
    margin-top: 60px;
}

.channel-item {
    text-align: center;
    padding: 30px 20px;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    flex: 1;
    max-width: 250px;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-light);
}

.channel-item:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-medium);
    transform: translateY(-3px);
}

.channel-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 20px;
    background: var(--primary-color);
    border-radius: 50%;
    color: white;
    font-size: 32px;
    line-height: 70px;
    text-align: center;
    box-shadow: 0 4px 12px rgba(231, 76, 60, 0.3);
}

.channel-ticket:before { content: "📝"; display: block; font-weight: bold; }
.channel-qq:before { content: "🐧"; display: block; font-weight: bold; }
.channel-remote:before { content: "📱"; display: block; font-weight: bold; }
.channel-phone:before { content: "📞"; display: block; font-weight: bold; }

.channel-item h5 {
    font-size: 18px;
    color: var(--secondary-color);
    margin: 0 0 10px;
    font-weight: 600;
}

.channel-item p {
    color: var(--text-light);
    font-size: 14px;
    margin: 0 0 20px;
    line-height: 1.5;
}

.channel-item a {
    display: inline-block;
    padding: 10px 25px;
    background: var(--primary-color);
    color: white;
    border-radius: 4px;
    text-decoration: none;
    transition: all 0.3s ease;
    font-weight: 500;
    border: 2px solid var(--primary-color);
}

.channel-item a:hover {
    background: white;
    color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(231, 76, 60, 0.3);
}

/* 企业微信二维码悬停预览样式 */
.wechat-hover-trigger {
    position: relative; /* 为绝对定位的预览层提供参考 */
    display: inline-block;
    cursor: pointer; /* 鼠标放上去变成手型，提示可交互 */
}

/* 预览层 - 默认隐藏 */
.qrcode-preview {
    position: absolute;
    bottom: 120%; /* 显示在触发文字的正上方 */
    left: 50%;
    transform: translateX(-50%); /* 水平居中 */
    width: 180px; /* 控制预览图片显示的最大宽度 */
    height: 180px; /* 控制预览图片显示的最大高度 */
    padding: 10px;
    background: #fff;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1000; /* 确保在最上层 */
    text-align: center;
}

/* 预览图片样式 */
.qrcode-preview img {
    max-width: 100%; /* 图片自适应容器宽度 */
    max-height: 100%; /* 图片自适应容器高度 */
    width: auto;
    height: auto;
    display: block;
    border-radius: 4px;
}

/* 下方的小三角指示 */
.preview-arrow {
    position: absolute;
    bottom: -6px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 6px solid transparent;
    border-right: 6px solid transparent;
    border-top: 6px solid #fff; /* 与预览层背景色一致 */
    filter: drop-shadow(0 2px 1px rgba(0, 0, 0, 0.1)); /* 给三角加一点阴影 */
}

/* 鼠标悬停在触发文字上时，显示预览层 */
.wechat-hover-trigger:hover .qrcode-preview {
    opacity: 1;
    visibility: visible;
}

/* ============================================
   4. 安全与合规
   ============================================ */
.security-safety {
    padding: 95px 0;
    overflow: hidden;
    min-width: 1220px;
    background: var(--bg-light);
}

.safety-features {
    margin: 50px 0;
}

.feature-row {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-bottom: 30px;
}

.feature-item {
    flex: 1;
    max-width: 570px;
    padding: 35px 30px;
    background: white;
    border-radius: 10px;
    box-shadow: var(--shadow-light);
    transition: all 0.3s ease;
    border-top: 4px solid var(--primary-color);
}

.feature-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
}

.feature-icon {
    width: 70px;
    height: 70px;
    margin-bottom: 25px;
    background: var(--primary-color);
    border-radius: 50%;
    color: white;
    font-size: 32px;
    line-height: 70px;
    text-align: center;
    box-shadow: 0 4px 12px rgba(231, 76, 60, 0.3);
}

.feature-physical:before { content: "🏢"; display: block; font-weight: bold; }
.feature-network:before { content: "🌐"; display: block; font-weight: bold; }
.feature-data:before { content: "💾"; display: block; font-weight: bold; }
.feature-operation:before { content: "⚙️"; display: block; font-weight: bold; }

.feature-item h4 {
    font-size: 22px;
    color: var(--secondary-color);
    margin: 0 0 15px;
    font-weight: 600;
}

.feature-item p {
    color: var(--text-light);
    line-height: 1.6;
    margin: 0;
    font-size: 15px;
}

.safety-advantages {
    background: white;
    padding: 40px;
    border-radius: 10px;
    margin-top: 60px;
    box-shadow: var(--shadow-light);
}

.safety-advantages h3 {
    font-size: 24px;
    color: var(--secondary-color);
    margin: 0 0 30px;
    text-align: center;
    font-weight: 600;
}

.safety-advantages ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.safety-advantages ul li {
    padding: 12px 0 12px 40px;
    position: relative;
    color: var(--text-color);
    line-height: 1.5;
    font-size: 16px;
    border-bottom: 1px solid var(--border-color);
}

.safety-advantages ul li:last-child {
    border-bottom: none;
}

.safety-advantages ul li:before {
    content: "✓";
    position: absolute;
    left: 0;
    top: 12px;
    width: 24px;
    height: 24px;
    background: var(--success-color);
    color: white;
    border-radius: 50%;
    text-align: center;
    line-height: 24px;
    font-size: 14px;
    font-weight: bold;
}

/* ============================================
   5. 数据备份与灾备
   ============================================ */
.security-backup {
    padding: 95px 0;
    overflow: hidden;
    min-width: 1220px;
    background: white;
}

.backup-strategy {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin: 50px 0 70px;
}

.strategy-item {
    flex: 1;
    max-width: 560px;
    padding: 40px;
    border-radius: 10px;
    border: 2px solid var(--border-color);
    background: white;
    box-shadow: var(--shadow-light);
    transition: all 0.3s ease;
}

.strategy-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
}

.free-strategy {
    border-color: var(--success-color);
    background: linear-gradient(135deg, rgba(39, 174, 96, 0.05), transparent);
}

.premium-strategy {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, rgba(231, 76, 60, 0.05), transparent);
}

.strategy-item h3 {
    font-size: 24px;
    color: var(--secondary-color);
    margin: 0 0 30px;
    display: flex;
    align-items: center;
    gap: 15px;
    font-weight: 600;
}

.strategy-badge {
    padding: 8px 18px;
    background: var(--primary-color);
    color: white;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    white-space: nowrap;
}

.free-strategy .strategy-badge {
    background: var(--success-color);
}

.strategy-item ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.strategy-item ul li {
    padding: 12px 0 12px 30px;
    position: relative;
    color: var(--text-color);
    line-height: 1.5;
    font-size: 15px;
}

.strategy-item ul li:before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-size: 24px;
    line-height: 1;
}

.free-strategy ul li:before {
    color: var(--success-color);
}

.disaster-recovery {
    background: var(--bg-light);
    padding: 50px;
    border-radius: 10px;
    margin-top: 60px;
    box-shadow: var(--shadow-light);
}

.disaster-recovery h3 {
    font-size: 24px;
    color: var(--secondary-color);
    margin: 0 0 40px;
    text-align: center;
    font-weight: 600;
}

.dr-options {
    display: flex;
    justify-content: center;
    gap: 30px;
}

.dr-option {
    flex: 1;
    max-width: 350px;
    text-align: center;
    padding: 35px 25px;
    background: white;
    border-radius: 8px;
    box-shadow: var(--shadow-light);
    transition: all 0.3s ease;
    border-top: 4px solid var(--primary-color);
}

.dr-option:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
}

.dr-option h4 {
    font-size: 20px;
    color: var(--secondary-color);
    margin: 0 0 15px;
    font-weight: 600;
}

.dr-option p {
    color: var(--text-light);
    line-height: 1.5;
    margin: 0 0 20px;
    min-height: 45px;
    font-size: 15px;
}

.dr-price {
    font-size: 20px;
    font-weight: bold;
    color: var(--primary-color);
    padding: 15px 0 0;
    border-top: 1px solid var(--border-color);
    margin-top: 20px;
}

/* ============================================
   6. VIP专属服务
   ============================================ */
.security-vip {
    padding: 95px 0;
    overflow: hidden;
    min-width: 1220px;
    background: var(--bg-light);
}

.vip-benefits {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin: 50px 0 70px;
}

.benefit-column {
    flex: 1;
    max-width: 370px;
}

.benefit-item {
    background: white;
    padding: 30px 25px;
    border-radius: 8px;
    box-shadow: var(--shadow-light);
    margin-bottom: 25px;
    transition: all 0.3s ease;
    border-left: 4px solid transparent;
}

.benefit-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
    border-left: 4px solid var(--primary-color);
}

.benefit-icon {
    width: 60px;
    height: 60px;
    margin-bottom: 20px;
    background: var(--primary-color);
    border-radius: 50%;
    color: white;
    font-size: 28px;
    line-height: 60px;
    text-align: center;
    box-shadow: 0 4px 12px rgba(231, 76, 60, 0.3);
}

.benefit-manager:before { content: "👥"; display: block; font-weight: bold; }
.benefit-architect:before { content: "🏗️"; display: block; font-weight: bold; }
.benefit-priority:before { content: "🚀"; display: block; font-weight: bold; }
.benefit-report:before { content: "📊"; display: block; font-weight: bold; }
.benefit-training:before { content: "🎓"; display: block; font-weight: bold; }
.benefit-business:before { content: "🤝"; display: block; font-weight: bold; }

.benefit-item h4 {
    font-size: 18px;
    color: var(--secondary-color);
    margin: 0 0 12px;
    font-weight: 600;
}

.benefit-item p {
    color: var(--text-light);
    line-height: 1.5;
    margin: 0;
    font-size: 14px;
}

.vip-contact {
    background: white;
    padding: 50px;
    border-radius: 10px;
    text-align: center;
    box-shadow: var(--shadow-medium);
}

.vip-contact h3 {
    font-size: 28px;
    color: var(--secondary-color);
    margin: 0 0 20px;
    font-weight: 600;
}

.vip-contact p {
    color: var(--text-light);
    line-height: 1.6;
    margin: 0 0 40px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    font-size: 16px;
}

.contact-ways {
    display: flex;
    justify-content: center;
    gap: 25px;
}

.vip-btn {
    display: inline-block;
    padding: 15px 35px;
    font-size: 16px;
    font-weight: 600;
    border-radius: 6px;
    text-decoration: none;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    box-shadow: var(--shadow-light);
}

.vip-qq {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.vip-qq:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(231, 76, 60, 0.4);
}

.vip-phone {
    background: white;
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.vip-phone:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(231, 76, 60, 0.4);
}

.vip-ticket {
    background: var(--secondary-color);
    color: white;
    border-color: var(--secondary-color);
}

.vip-ticket:hover {
    background: #1a252f;
    border-color: #1a252f;
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(44, 62, 80, 0.4);
}

/* ============================================
   7. 备案协助
   ============================================ */
.security-beian {
    padding: 95px 0 70px;
    overflow: hidden;
    min-width: 1220px;
    background: white;
}

.beian-features {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin: 50px 0 60px;
}

.beian-features .feature-item {
    flex: 1;
    max-width: 370px;
    text-align: center;
    padding: 30px 25px;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-light);
}

.beian-features .feature-item:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-medium);
    transform: translateY(-3px);
}

.beian-features .feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 25px;
    background: var(--primary-color);
    border-radius: 50%;
    color: white;
    font-size: 36px;
    line-height: 80px;
    text-align: center;
    box-shadow: 0 4px 12px rgba(231, 76, 60, 0.3);
}

.feature-smart:before { content: "🖥️"; display: block; font-weight: bold; }
.feature-expert:before { content: "🧑"; display: block; font-weight: bold; }
.feature-fast:before { content: "⚡"; display: block; font-weight: bold; }

.beian-features .feature-item h4 {
    font-size: 20px;
    color: var(--secondary-color);
    margin: 0 0 15px;
    font-weight: 600;
}

.beian-features .feature-item p {
    color: var(--text-light);
    line-height: 1.5;
    margin: 0;
    font-size: 15px;
}

/* ============================================
   移动端响应式设计
   ============================================ */
@media screen and (max-width: 1220px) {
    .container {
        width: 100%;
        padding: 0 20px;
    }
    
    .security-cloumn,
    .security-sla,
    .security-refund,
    .security-support,
    .security-safety,
    .security-backup,
    .security-vip,
    .security-beian {
        min-width: auto;
    }
    
    .security-cloumn ul {
        width: 100%;
        overflow-x: auto;
        white-space: nowrap;
        padding: 0 20px;
        height: 80px;
    }
    
    .security-cloumn ul li {
        width: auto;
        min-width: 140px;
        float: none;
        display: inline-block;
        line-height: 77px;
    }
}

@media screen and (max-width: 768px) {
    .security-banner {
        height: 400px;
        padding: 0 20px;
        text-align: center;
    }
    
    .security-banner .header-info {
        width: 100%;
        padding-top: 100px;
    }
    
    .security-banner .header-info h1 {
        font-size: 28px;
        margin-bottom: 20px;
    }
    
    .security-banner .header-info p {
        font-size: 16px;
        margin-bottom: 40px;
        line-height: 1.6;
    }
    
    .security-title {
        font-size: 28px;
        margin-bottom: 40px;
        padding-top: 0;
    }
    
    .security-title span {
        font-size: 15px;
        margin-top: 15px;
        padding: 0 10px;
    }
    
    .security-cloumn {
        display: none;
    }
    
    .cloumn-blank {
        display: none !important;
    }
    
    .mobile-nav {
        display: block;
    }
    
    /* 所有模块通用响应式 */
    .security-sla,
    .security-refund,
    .security-support,
    .security-safety,
    .security-backup,
    .security-vip,
    .security-beian {
        padding: 60px 0;
    }
    
    /* 响应式布局调整 */
    .sla-levels,
    .support-levels,
    .feature-row,
    .backup-strategy,
    .dr-options,
    .vip-benefits,
    .beian-features,
    .contact-channels,
    .contact-ways {
        flex-direction: column;
        align-items: center;
        gap: 20px;
    }
    
    .sla-item,
    .level-item,
    .feature-item,
    .strategy-item,
    .dr-option,
    .benefit-column,
    .beian-features .feature-item,
    .channel-item {
        max-width: 100%;
        width: 100%;
        margin-bottom: 20px;
        box-sizing: border-box;
    }
    
    .benefit-column {
        max-width: 100%;
        width: 100%;
    }
    
    .benefit-item {
        margin-bottom: 20px;
    }
    
    /* 时间轴流程移动端适配 */
    .security-list {
        display: flex;
        flex-direction: column;
        align-items: flex-start;
        margin: 30px 0;
        padding-left: 20px;
    }
    
    .security-list li {
        float: none;
        width: 100%;
        margin-bottom: 40px;
        display: flex;
        align-items: center;
        text-align: left;
        padding: 0;
        position: relative;
    }
    
    .security-list li:before {
        margin: 0 20px 0 0;
        flex-shrink: 0;
        width: 50px;
        height: 50px;
        line-height: 46px;
        font-size: 20px;
    }
    
    .security-list p {
        display: none;
    }
    
    .security-list h5 {
        height: auto;
        justify-content: flex-start;
        font-size: 18px;
        padding: 0;
        text-align: left;
    }
    
    /* 添加移动端垂直连接线 */
    .security-list li:after {
        content: "";
        position: absolute;
        left: 25px;
        top: 70px;
        bottom: -20px;
        width: 2px;
        background: linear-gradient(to bottom, var(--primary-light), var(--primary-color));
        z-index: 1;
    }
    
    .security-list li:last-child:after {
        display: none;
    }
    
    .security-list li:last-child {
        padding-bottom: 0;
        margin-bottom: 0;
    }
    
    /* 问题解答移动端适配 */
    .security-problems {
        padding: 25px 20px;
        margin-top: 30px;
    }
    
    .security-problems dt {
        height: auto;
        line-height: 1.4;
        padding: 15px 50px 15px 60px;
        min-height: 56px;
        display: flex;
        align-items: center;
    }
    
    .security-problems dd {
        padding: 20px;
    }
    
    .security-problems dd p {
        padding-left: 25px;
    }
    
    /* 按钮移动端适配 */
    .security-btns {
        padding: 30px 0;
    }
    
    .security-btns a {
        width: 100%;
        max-width: 300px;
        margin: 10px 0;
        display: block;
        box-sizing: border-box;
    }
    
    .vip-contact {
        padding: 30px 20px;
    }
    
    .vip-btn {
        width: 100%;
        max-width: 300px;
        margin: 10px 0;
        box-sizing: border-box;
        padding: 12px 20px;
    }
    
    .contact-ways {
        flex-direction: column;
        align-items: center;
    }
    
    /* 卡片样式移动端适配 */
    .security-stype ul {
        flex-direction: column;
        align-items: center;
        gap: 20px;
    }
    
    .security-stype ul li {
        max-width: 100%;
        width: 100%;
    }
}

@media screen and (max-width: 480px) {
    .security-banner {
        height: 350px;
    }
    
    .security-banner .header-info {
        padding-top: 80px;
    }
    
    .security-banner .header-info h1 {
        font-size: 24px;
    }
    
    .security-title {
        font-size: 24px;
    }
    
    .security-title span {
        font-size: 14px;
    }
    
    .sla-value {
        font-size: 28px;
    }
    
    .response-time {
        font-size: 18px;
    }
    
    .channel-item,
    .feature-item,
    .strategy-item,
    .dr-option {
        padding: 25px 15px;
    }
    
    .mobile-nav-select {
        font-size: 14px;
        padding: 10px 12px;
    }
}