/* #1 基础变量 */
/* style.css */
/* #1 基础变量与重置 */
:root {
    --cream: #FAF8F5;
    --beige: #F5E6D3;
    --accent: #D8C1A5;
    --grey-dark: #6E655D;
    --grey-light: #A0988F;
    --shadow-sm: 0 2px 8px rgba(110, 101, 93, 0.08);
    --shadow-md: 0 4px 16px rgba(110, 101, 93, 0.12);
    --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', sans-serif;
    background-color: var(--cream);
    color: var(--grey-dark);
    line-height: 1.6;
}

/* #2 全屏品牌区样式 */
.fullscreen-hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    background: url('../about/image/shiji.jpg') center/cover no-repeat;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(250, 248, 245, 0.3);
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 0 20px;
    max-width: 800px;
}

.hero-logo {
    width: 120px;
    margin-bottom: 20px;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.1));
}

.hero-title {
    font-size: 3rem;
    font-weight: 500;
    color: var(--grey-dark);
    margin-bottom: 10px;
    text-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--grey-dark);
    margin-bottom: 40px;
}


/* #3 通用模块样式 */
.module {
    padding: 80px 0;
    position: relative;
}

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

.module-title {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 50px;
    font-size: 2rem;
    color: var(--grey-dark);
}

.module-title i {
    margin-right: 10px;
    color: var(--accent);
}

/* #4 我们是谁模块 */
#who-we-are {
    background: linear-gradient(to bottom, var(--cream) 0%, rgba(245, 230, 211, 0.3) 100%);
}

.content-wrapper {
    display: flex;
    align-items: center;
    gap: 40px;
}

.text-content {
    flex: 1;
}

.brand-story {
    font-size: 1.2rem;
    line-height: 1.8;
    color: var(--grey-dark);
    margin-bottom: 40px;
    position: relative;
    padding-left: 30px;
}

.brand-story::before {
    content: '"';
    position: absolute;
    left: 0;
    top: -10px;
    font-size: 3rem;
    color: var(--accent);
    line-height: 1;
}

.core-values {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.value-item {
    background: white;
    border-radius: 12px;
    padding: 30px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

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

.value-icon {
    width: 60px;
    height: 60px;
    background: rgba(216, 193, 165, 0.2);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: var(--accent);
}

.image-content {
    flex: 1;
}

.team-illustration {
    height: 400px;
    background: url('assets/team-illustration.svg') center/contain no-repeat;
    opacity: 0.9;
}
/* #5 产品概念模块 */
/* 产品概念模块 - 莫兰迪风格 */
#product-concept {
    background: linear-gradient(to bottom, #FAF8F5 0%, rgba(245,230,211,0.1) 100%);
    padding: 60px 0;
}

.concept-intro {
    text-align: center;
    color: #A0988F;
    margin-bottom: 30px;
    font-size: 1.1rem;
}

.concept-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.concept-card {
    background: white;
    border-radius: 16px;
    padding: 30px 25px;
    box-shadow: 0 4px 12px rgba(152,130,109,0.08);
    position: relative;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
}

.card-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: white;
    font-size: 1.8rem;
    background: #D8C1A5; /* 默认色 */
}

[data-concept="location"] .card-icon {
    background: #A3C9AA; /* 寻摊焦虑-绿色 */
}

[data-concept="payment"] .card-icon {
    background: #9BB8CD; /* 支付壁垒-蓝色 */
}

[data-concept="community"] .card-icon {
    background: #E8BBAF; /* 食友社区-粉色 */
}

.concept-card h3 {
    color: #6E655D;
    font-size: 1.3rem;
    margin-bottom: 10px;
}

.card-desc {
    color: #A0988F;
    font-size: 0.95rem;
    min-height: 40px;
}

.card-wave {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, #D8C1A5, #A3C9AA, #9BB8CD, #E8BBAF);
    opacity: 0.3;
    transition: all 0.4s ease;
}

.concept-details {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
    color: #6E655D;
    font-size: 0.9rem;
    line-height: 1.6;
}

/* 交互效果 */
.concept-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 28px rgba(152,130,109,0.15);
}

.concept-card:hover .card-wave {
    height: 8px;
    opacity: 0.6;
}

.concept-card:hover .concept-details {
    max-height: 100px;
    margin-top: 15px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .concept-cards {
        grid-template-columns: 1fr;
    }
    
    .concept-card {
        padding: 25px 20px;
    }
}
/* #10 文本样式 */
.visual-card h3 {
    font-size: 1.1rem;
    color: var(--grey-dark);
    margin-bottom: 5px;
}

.visual-card p {
    color: var(--grey-light);
    font-size: 0.9rem;
}

/* #11 底部按钮 */
.research-footer {
    text-align: center;
    margin-top: 40px;
}

.data-download {
    background: var(--color-1);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 30px;
    font-size: 1rem;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.data-download:hover {
    background: var(--grey-dark);
    transform: translateY(-2px);
}

/* #12 响应式设计 */
@media (max-width: 768px) {
    .data-visualizations {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 480px) {
    .data-visualizations {
        grid-template-columns: 1fr;
    }
}

/* #7 用户画像模块 */
/* 用户画像模块 - 莫兰迪风格 */
#user-persona {
    background: linear-gradient(to bottom, #FAF8F5 0%, rgba(245,230,211,0.2) 100%);
    padding: 60px 0;
}

.persona-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.persona-card {
    background: white;
    border-radius: 16px;
    padding: 30px;
    box-shadow: 0 4px 12px rgba(152,130,109,0.08);
    transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
}

/* 头像样式 */
.avatar {
    position: relative;
    width: 100px;
    height: 100px;
    margin: 0 auto 20px;
}

.avatar-image {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background-size: cover;
    background-position: center;
    border: 3px solid white;
    box-shadow: 0 6px 12px rgba(0,0,0,0.1);
}

/* 不同用户类型的头像背景 */
.student .avatar-image {
    background-color: #D8C1A5; /* 学生黄 */
}
.researcher .avatar-image {
    background-color: #9BB8CD; /* 研究生蓝 */
}
.international .avatar-image {
    background-color: #A3C9AA; /* 留学生绿 */
}

/* 状态指示点 */
.status-dot {
    position: absolute;
    bottom: 5px;
    right: 5px;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    border: 3px solid white;
}
.online { background: #A3C9AA; } /* 在线 */
.busy { background: #E8BBAF; }   /* 忙碌 */
.away { background: #9BB8CD; }   /* 离开 */

/* 文字信息 */
.persona-card h3 {
    font-size: 1.3rem;
    color: #6E655D;
    text-align: center;
    margin: 15px 0 5px;
}

.role {
    color: #A0988F;
    text-align: center;
    font-size: 0.9rem;
    margin-bottom: 15px;
}

/* 标签样式 */
.tags {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
    margin: 20px 0;
}

.tags span {
    background: rgba(216,193,165,0.2);
    color: #6E655D;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
}

/* 用户语录 */
.quote {
    font-style: italic;
    color: #A0988F;
    text-align: center;
    padding: 15px;
    margin-top: 15px;
    border-top: 1px dashed rgba(168,147,125,0.2);
    position: relative;
}

/* 悬停效果 */
.persona-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 28px rgba(152,130,109,0.15);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .persona-cards {
        grid-template-columns: 1fr;
    }
    
    .avatar {
        width: 80px;
        height: 80px;
    }
}

/* #8 使用场景模块 */
/* 使用场景模块 - 莫兰迪风格 */
#use-cases {
    background: linear-gradient(to bottom, #F5F0E6 0%, rgba(245,240,230,0.2) 100%);
    padding: 60px 0;
}

.scenario-intro {
    text-align: center;
    color: #A0988F;
    margin-bottom: 30px;
    font-size: 1.1rem;
}

.scenario-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 25px;
    max-width: 1200px;
    margin: 0 auto;
}

.scenario-item {
    background: white;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(152,130,109,0.08);
    transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
}

.scene-illustration {
    height: 140px;
    position: relative;
    background-size: cover;
    background-position: center;
}

.scene-illustration::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(0,0,0,0.1), rgba(0,0,0,0.3));
}

.scene-badge {
    position: absolute;
    top: 15px;
    right: 15px;
    background: rgba(255,255,255,0.9);
    color: #6E655D;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.1rem;
    box-shadow: 0 3px 6px rgba(0,0,0,0.1);
}

/* 不同场景的背景图 */
.classroom { background-image: url('../assets/scenes/classroom.jpg'); }
.dormitory { background-image: url('../assets/scenes/dormitory.jpg'); }
.library { background-image: url('../assets/scenes/library.jpg'); }
.group { background-image: url('../assets/scenes/group.jpg'); }
.express { background-image: url('../assets/scenes/express.jpg'); }

.scenario-item h3 {
    color: #6E655D;
    font-size: 1.2rem;
    padding: 15px 20px 5px;
    margin: 0;
}

.scene-desc {
    color: #A0988F;
    font-size: 0.9rem;
    padding: 0 20px 15px;
    margin: 0;
}

.scene-stats {
    padding: 0 20px 20px;
    font-size: 0.8rem;
    color: #6E655D;
    display: flex;
    align-items: center;
}

.scene-stats i {
    font-size: 1rem;
    margin-right: 5px;
    color: #D8C1A5;
}

/* 交互效果 */
.scenario-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 28px rgba(152,130,109,0.15);
}

.scenario-item:hover .scene-illustration::before {
    background: linear-gradient(to bottom, rgba(110,101,93,0.2), rgba(110,101,93,0.4));
}

/* 响应式设计 */
@media (max-width: 768px) {
    .scenario-gallery {
        grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
        gap: 15px;
    }
    
    .scene-illustration {
        height: 120px;
    }
}

@media (max-width: 480px) {
    .scenario-gallery {
        grid-template-columns: 1fr;
    }
}

/* #9 核心功能模块 */
/* 核心功能模块 - 莫兰迪风格 */
#core-features {
    background: linear-gradient(to bottom, #F5F0E6 0%, rgba(245,240,230,0.2) 100%);
    padding: 60px 0;
}

.feature-intro {
    text-align: center;
    color: #A0988F;
    margin-bottom: 30px;
    font-size: 1.1rem;
}

/* 思维导图容器 */
.mindmap-container {
    margin: 40px auto;
    max-width: 900px;
}

.mindmap-title {
    color: #6E655D;
    font-size: 1.3rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.mindmap-title i {
    color: #D8C1A5;
    margin-right: 10px;
    font-size: 1.5rem;
}

.mindmap-card {
    background: white;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 6px 18px rgba(152,130,109,0.1);
    transition: all 0.4s ease;
}

.mindmap-image {
    width: 100%;
    height: auto;
    display: block;
    border-bottom: 1px solid rgba(168,147,125,0.1);
}

.mindmap-highlights {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    padding: 20px;
    gap: 15px;
}

.highlight-item {
    display: flex;
    align-items: center;
    background: rgba(216,193,165,0.1);
    padding: 8px 15px;
    border-radius: 20px;
    color: #6E655D;
    font-size: 0.9rem;
}

.highlight-item i {
    color: #A3C9AA;
    margin-right: 8px;
    font-size: 1rem;
}

/* 用户端与商贩端区分 */
.user-side {
    border-top: 4px solid #A3C9AA;
}

.vendor-side {
    border-top: 4px solid #9BB8CD;
}

/* 功能网格样式 */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 25px;
    margin-top: 40px;
}

.feature-item {
    background: white;
    border-radius: 16px;
    padding: 25px;
    text-align: center;
    box-shadow: 0 4px 12px rgba(152,130,109,0.08);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.feature-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: rgba(216,193,165,0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 15px;
    color: #6E655D;
    font-size: 1.8rem;
    transition: all 0.3s ease;
}

.feature-item h3 {
    color: #6E655D;
    font-size: 1.2rem;
    margin-bottom: 8px;
}

.feature-item p {
    color: #A0988F;
    font-size: 0.9rem;
    margin-bottom: 15px;
}

.feature-stats {
    font-size: 0.8rem;
    color: #A3C9AA;
    font-weight: bold;
    margin-top: 10px;
}

/* 交互效果 */
.feature-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 28px rgba(152,130,109,0.15);
}

.feature-item:hover .feature-icon {
    background: #D8C1A5;
    color: white;
    transform: rotate(15deg) scale(1.1);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .mindmap-highlights {
        flex-direction: column;
        align-items: center;
    }
    
    .feature-grid {
        grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    }
}

@media (max-width: 480px) {
    .mindmap-card {
        border-radius: 12px;
    }
    
    .feature-grid {
        grid-template-columns: 1fr;
    }
}

/* #11 团队成员模块 */
#team-members {
    background: linear-gradient(to bottom, white 0%, var(--cream) 100%);
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
}

.team-member {
    text-align: center;
}

.member-photo {
    width: 150px;
    height: 150px;
    margin: 0 auto 20px;
    position: relative;
}

.photo-frame {
    background-size: cover;
    background-position: center;
    width: 150px;
    height: 150px;
    border-radius: 50%;
    border: 3px solid white;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}
.skill-tags {
    position: absolute;
    bottom: -10px;
    left: 0;
    right: 0;
    display: none;
    justify-content: center;
    gap: 5px;
}

.team-member:hover .skill-tags {
    display: flex;
}

.skill-tags span {
    background: var(--accent);
    color: white;
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 0.7rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .content-wrapper {
        flex-direction: column;
    }
    
    .hero-title {
        font-size: 2.2rem;
    }
    
    .module-title {
        font-size: 1.5rem;
    }
    
    .team-illustration {
        height: 250px;
    }
}
/* 返回按钮样式 - 莫兰迪风格 */
.close-button {
    position: fixed;
    left: 20px;
    top: 20px;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(216, 193, 165, 0.15);
    border: 1px solid rgba(168, 147, 125, 0.2);
    color: #6E655D;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 1000;
    transition: all 0.3s cubic-bezier(0.23, 1, 0.32, 1);
    box-shadow: 0 2px 6px rgba(152,130,109,0.05);
}

.close-button:hover {
    background: rgba(216, 193, 165, 0.25);
    transform: rotate(90deg) scale(1.1);
    box-shadow: 0 4px 10px rgba(152,130,109,0.1);
}

.close-button:active {
    transform: rotate(90deg) scale(0.95);
}

.close-button .material-icons {
    font-size: 24px;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .close-button {
        left: 15px;
        top: 15px;
        width: 36px;
        height: 36px;
    }
}