/* 全局重置与现代化设计 */
:root {
    --primary-color: #4a4e69;
    --secondary-color: #9a8c98;
    --accent-color: #c9ada7;
    --background-color: #f2e9e4;
    --text-color: #22223b;
}

/* 全局隐藏类 */
.dn {
    display: none !important;
}

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

body,
html {
    font-family: 'Inter', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
    scroll-behavior: smooth;
}

/* 渐变式头部 */
.gradient-header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    padding: 1rem 0;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
    position: relative;
}

.logo-container {
    display: flex;
    align-items: center;
}


.logo {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    margin-right: 15px;
}

.company-name {
    color: white;
    font-size: 1.5rem;
    font-weight: 600;
}

.nav-menu ul {
    display: flex;
    list-style: none;
}

.nav-menu ul li {
    margin-left: 25px;
}

.nav-menu ul li a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-menu ul li a:hover {
    color: var(--accent-color);
}

/* 英雄区域 */
.hero-parallax {
    height: 100vh;
    background: linear-gradient(rgba(74, 78, 105, 0.8), rgba(154, 140, 152, 0.8)),
        url('../images/backimage.jpg');
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
}

.hero-content {
    max-width: 800px;
    padding: 0 20px;
}

.hero-content h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    font-weight: 700;
}

.hero-content p {
    font-size: 1.5rem;
    margin-bottom: 30px;
}

.cta-button {
    display: inline-block;
    background-color: var(--accent-color);
    color: white;
    padding: 12px 30px;
    text-decoration: none;
    border-radius: 50px;
    transition: background-color 0.3s ease;
}

.cta-button:hover {
    background-color: var(--secondary-color);
}

/* 各个section通用样式 */
.section-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 80px 20px;
}

section h2 {
    text-align: center;
    margin-bottom: 50px;
    font-size: 2.5rem;
    color: var(--primary-color);
}

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

.mission-item {
    background-color: white;
    padding: 30px;
    text-align: center;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.mission-item:hover {
    transform: translateY(-10px);
}

.mission-item i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

/* 方法论部分 */
.approach-content {
    display: flex;
    align-items: center;
    gap: 50px;
}

.approach-text ul {
    list-style-type: none;
    margin-top: 20px;
}

.approach-text ul li {
    margin-bottom: 10px;
    position: relative;
    padding-left: 30px;
}

.approach-text ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent-color);
}

/* 解决方案部分 */
.solutions-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.solution-card {
    background-color: white;
    padding: 30px;
    text-align: center;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.solution-card:hover {
    transform: translateY(-10px);
}

.solution-card i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

/* 联系我们部分 */
.contact-info {
    display: flex;
    gap: 50px;
}

.contact-details {
    flex: 1;
}

.contact-details p {
    display: flex;
    align-items: center;
}

.contact-details i {
    width: 25px;
    text-align: center;
    margin-right: 10px;
}

/* 页脚 */
footer {
    background-color: var(--primary-color);
    color: white;
    text-align: center;
    padding: 20px;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
}

/* 用户登录相关样式 */
#user {
    width: 100px;
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    border-radius: 6px;
}

#user>#login-button {
    display: inline-block;
    padding: 10px 20px;
    background: var(--primary-color);
    font-size: 16px;
    color: white;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

#user>#login-button:hover {
    background: var(--secondary-color);
}

#user>img {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    cursor: pointer;
}

#user-menu {
    position: absolute;
    min-width: 200px;
    line-height: 40px;
    background-color: rgba(233, 233, 233, 0.9);
    border: 1px solid #dcdcdc;
    top: 90px;
    right: 0;
    z-index: 9999;
    text-align: center;
    font-size: 18px;
    padding: 6px;
    border-radius: 10px;
}

#user-menu>li {
    list-style-type: none;
    padding: 0 10px;
}

#user-menu>li.user-menu:hover {
    background-color: var(--primary-color);
    color: #fff;
    border-radius: 6px;
    cursor: pointer;
}

#user-menu>#user-name {
    font-size: 20px;
    font-weight: 800;
    color: var(--text-color);
}

/* 登录表单样式 */
#loginForm {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    padding: 20px;
    border-radius: 10px;
}

#loginForm>div {
    width: 100%;
    height: 50px;
    line-height: 50px;
    margin-bottom: 10px;
    clear: both;
}

.form-label {
    width: 120px;
    float: left;
    text-align: center;
    color: var(--text-color);
}

#google-code-title {
    line-height: 20px;
}

.input-block {
    width: calc(100% - 130px);
    float: right;
}

.input-block>input {
    width: 100%;
    height: 50px;
    border: 1px solid #dcdcdc;
    padding: 0 8px;
    border-radius: 6px;
}

.input-block>input:focus {
    border-color: var(--primary-color);
}

#login-btn-group>button {
    width: 100%;
    height: 50px;
    border: 1px solid #dcdcdc;
    background-color: var(--primary-color);
    color: white;
    font-size: 18px;
    font-weight: 500;
    line-height: 50px;
    cursor: pointer;
    transition: background-color 0.3s ease;
    border-radius: 6px;
}

#login-btn-group>button:hover {
    background-color: var(--secondary-color);
}

.google-code-group {
    display: flex;
    justify-content: space-between;
}

.code-input {
    width: 40px;
    height: 40px;
    font-size: 18px;
    border: 1px solid #dcdcdc;
    text-align: center;
    border-radius: 6px;
}

.code-input:focus {
    border-color: var(--primary-color);
}

.code-input:invalid {
    border-color: #ff4949;
}

/* 响应式设计 */
@media (max-width: 768px) {

    .header-container,
    .nav-menu ul {
        flex-direction: column;
        align-items: center;
    }

    .nav-menu ul li {
        margin: 10px 0;
    }

    .mission-grid,
    .solutions-grid {
        grid-template-columns: 1fr;
    }

    .approach-content {
        flex-direction: column;
    }

    .contact-info {
        flex-direction: column;
    }

    #user {
        margin-top: 10px;
    }
}