/* =========================================
   基础样式 & 奶油色日间模式 (Light Mode)
========================================= */

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    background-color: #FBF2D2; /* 奶油色背景 */
    color: #5D4050;           /* 深咖啡/紫文字，保持阅读质感 */
    margin: 0;
    padding: 0;
}

.container {
    width: 80%;
    margin: auto;
    overflow: hidden;
    padding: 20px;
}

/* --- 页眉 (Header) --- */
header {
    background: #E6A071;      /* 焦糖橘 */
    color: #ffffff;
    padding: 40px 0;
    min-height: 80px;
    border-bottom: #FCDDA3 5px solid;
    position: relative;       /* 必须保留，为了按钮定位 */
    text-align: center;
}

header h1 {
    margin: 0;
    text-transform: uppercase;
    font-size: 2em;
    letter-spacing: 2px;
}

/* 昼夜模式切换按钮 */
#theme-toggle-button {
    position: absolute;
    top: 25px;
    right: 30px;
    background-color: #D48C5C;
    color: #fff;
    border: 2px solid #FCDDA3;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    font-size: 20px;
    cursor: pointer;
    transition: all 0.3s;
    z-index: 100;
}

#theme-toggle-button:hover {
    background-color: #FCDDA3;
    color: #5D4050;
    transform: scale(1.1);
}

/* 页眉左上角社交图标 */
.header-social-links {
    position: absolute;
    top: 30px;
    left: 30px;
    z-index: 100;
}

.header-social-links a {
    font-size: 24px;
    color: #ffffff;
    margin-right: 15px;
    text-decoration: none;
    transition: 0.3s;
}

.header-social-links a:hover {
    color: #FCDDA3;
    transform: scale(1.2);
}

/* --- 导航栏 (Nav) --- */
nav {
    background: #D48C5C;
    color: #fff;
    padding: 10px 0;
    text-align: center;
}

nav a {
    color: #fff;
    text-decoration: none;
    padding: 5px 20px;
    font-weight: bold;
    transition: background 0.3s, color 0.3s;
}

nav a:hover {
    background: #FCDDA3;
    color: #5D4050;
}

/* --- 内容区块 (Section) --- */
section {
    background: #ffffff;
    padding: 30px;
    margin-top: 20px;
    border-radius: 12px;
    border: 1px solid #FCDDA3;
    box-shadow: 0 4px 10px rgba(230, 160, 113, 0.1);
}

/* 个人简介布局 */
.intro-box {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 30px;
    margin-bottom: 20px;
}

.profile-image {
    width: 180px;
    height: 180px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid #FCDDA3;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    flex-shrink: 0;
}

/* 教育与项目经历框框 */
.education-box, .project-box {
    background: #FFFBF0;
    border: 2px dashed #FCDDA3;
    border-radius: 10px;
    padding: 20px;
    margin: 20px auto;
    width: 90%;
    box-sizing: border-box; /* 防止宽度溢出错位 */
}

.project-box h3 {
    color: #D48C5C;
    margin-top: 0;
}


/* =========================================
   页脚与联系方式 (Footer & Contact)
========================================= */

footer {
    text-align: center;
    padding: 40px 20px;
    background: #D48C5C;
    color: #ffffff;
    margin-top: 40px;
}

/* 关键修复：去除页脚内 section 的白色卡片样式，防止文字隐身 */
footer section {
    background: transparent !important;
    border: none !important;
    box-shadow: none !important;
    padding: 0;
    margin: 0;
}

.contact-message {
    color: #ffffff;
    font-size: 1.1em;
    line-height: 1.5;
    margin-bottom: 25px;
}

.footer-social-links {
    text-align: center;
    padding: 10px 0;
    margin-bottom: 25px;
}

.footer-social-links a {
    font-size: 28px;
    color: #ffffff;
    margin: 0 15px;
    text-decoration: none;
    transition: 0.3s;
}

.footer-social-links a:hover {
    color: #FCDDA3;
    transform: scale(1.2);
}

/* 下载简历按钮 */
.resume-button {
    display: inline-block;
    background-color: #FCDDA3;
    color: #5D4050;
    padding: 12px 30px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: bold;
    margin-bottom: 30px;
    transition: 0.3s;
    border: 2px solid transparent;
}

.resume-button:hover {
    background-color: #ffffff;
    border: 2px solid #FCDDA3;
    transform: translateY(-3px);
}

.copyright {
    font-size: 0.9em;
    color: #FBF2D2;
    margin-top: 20px;
}


/* =========================================
   黑夜模式 (Dark Mode)
========================================= */

body.dark-mode {
    background-color: #2D241E; /* 深咖色背景 */
    color: #FBF2D2;            /* 奶油色文字 */
}

/* 黑夜模式的页眉和页脚 */
body.dark-mode header,
body.dark-mode footer {
    background: #1F1814;
    border-color: #D48C5C;
}

body.dark-mode header h1 {
    color: #FCDDA3;
}

/* 黑夜模式的导航栏修复 */
body.dark-mode nav {
    background: #1F1814;
    border-bottom: 1px solid #3D322A;
}

body.dark-mode nav a {
    color: #FBF2D2;
}

body.dark-mode nav a:hover {
    background: #5D4050;
    color: #FCDDA3;
}

/* 黑夜模式的内容卡片 */
body.dark-mode section {
    background: #3D322A;
    border-color: #D48C5C;
    box-shadow: none;
}

body.dark-mode .education-box,
body.dark-mode .project-box {
    background: #2D241E;
    border-color: #D48C5C;
}

/* 黑夜模式的按钮和图标 */
body.dark-mode #theme-toggle-button {
    background-color: #3D322A;
    border-color: #D48C5C;
}

body.dark-mode .header-social-links a,
body.dark-mode .footer-social-links a,
body.dark-mode .contact-message {
    color: #FBF2D2;
}

body.dark-mode .header-social-links a:hover,
body.dark-mode .footer-social-links a:hover {
    color: #FCDDA3;
}

/* 黑夜模式简历按钮 */
body.dark-mode .resume-button {
    background-color: #D48C5C;
    color: #ffffff;
}

body.dark-mode .resume-button:hover {
    background-color: #3D322A;
    color: #FCDDA3;
    border-color: #D48C5C;
}