/* =============================================================================
   aboutme — 主样式
   · 响应式规则一律写在 css/responsive.css，本文件只保留桌面端基线
   · 技能图谱的字号按「基准字号 × 档位倍率」组织，全部集中在 :root
     JS 只负责测量标签的真实渲染尺寸来排布，不参与字号计算
   ========================================================================== */

/* --- 变量 --- */
:root {
    --bg-color: #0a0a0a;
    --card-bg: #1f1f1f;
    --text-primary: #ffffff;
    --text-secondary: #b3b3b3;
    --accent-color: #ff6900;

    --border-subtle: rgba(255, 255, 255, 0.06);
    --border-medium: rgba(255, 255, 255, 0.12);
    --border-strong: rgba(255, 255, 255, 0.3);

    --navbar-height: 72px;

    /* 系统字体栈：不引入外部 webfont，保证离线可用与中文正确回退 */
    --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
                 "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;

    /* 技能图谱排版：基准字号 + 各档倍率（移动端覆盖值见 responsive.css） */
    --skill-base-font: 1rem;
    --skill-scale-1: 1.6;
    --skill-scale-2: 1.3;
    --skill-scale-3: 1.1;
    --skill-scale-4: 0.95;
}

/* --- 全局重置 --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    /* 固定导航会盖住锚点目标，用 scroll-padding 预留出导航高度 */
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--navbar-height) + 16px);
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-main);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; color: inherit; transition: color 0.3s; }
ul { list-style: none; }

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
}

/* --- 通用工具类 --- */
.container {
    /* width: 100% 不能省：.section 是 flex 容器，而 margin: 0 auto 会阻止 flex 子项被拉伸，
       只写 max-width 的话 .container 会缩成"内容宽度"，整段布局随文案长短变形 */
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    min-height: 100vh;
    padding: 100px 0;
    display: flex;
    /* 用纵向 flex 做垂直居中：横向靠默认的 align-items: stretch 让 .container 撑满，
       否则 .container 会被压缩成"内容宽度"，max-width: 1200px 与 margin: 0 auto 全部失效 */
    flex-direction: column;
    justify-content: center;
    position: relative;
}

.section-title {
    font-size: 3rem;
    margin-bottom: 60px;
    text-align: center;
    font-weight: 700;
    letter-spacing: -1px;
}

.highlight { color: var(--accent-color); }

/* --- 导航栏 --- */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    height: var(--navbar-height);
    display: flex;
    align-items: center;
    background: rgba(10, 10, 10, 0.8);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--border-medium);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo { font-size: 1.5rem; font-weight: bold; letter-spacing: 2px; }
.logo:hover { color: var(--accent-color); }

.nav-links { display: flex; gap: 30px; }
.nav-links a:hover { color: var(--accent-color); }

/* 汉堡按钮：桌面端不显示，移动端规则在 responsive.css */
.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 42px;
    height: 42px;
    padding: 0 9px;
    background: none;
    border: 1px solid var(--border-medium);
    border-radius: 8px;
    cursor: pointer;
}

.nav-toggle-bar {
    display: block;
    height: 2px;
    width: 100%;
    background: var(--text-primary);
    border-radius: 2px;
    transition: transform 0.25s ease, opacity 0.25s ease;
}

.navbar.is-open .nav-toggle-bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.navbar.is-open .nav-toggle-bar:nth-child(2) { opacity: 0; }
.navbar.is-open .nav-toggle-bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* --- 英雄区域 --- */
.hero-section {
    text-align: center;
}

.hero-title {
    font-size: 5rem;
    line-height: 1.1;
    margin-bottom: 20px;
    background: linear-gradient(45deg, #fff, #999);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-slogan {
    font-size: 1.35rem;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin-bottom: 50px;
}

.hero-media img {
    max-width: 100%;
    height: auto;
    border-radius: 20px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
}

/* --- 技能图谱 --- */
.skills-cloud {
    position: relative;
    width: 100%;
    max-width: 1000px;
    margin: 0 auto;
}

/* 仅当 JS 确认 GSAP 可用时才接管布局与可见性 */
html.gsap-ready .skills-cloud { min-height: 700px; }
html.gsap-ready .skill-tag {
    opacity: 0;
    transform: scale(0);
}

.skill-tag {
    position: absolute;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    padding: 12px 20px;
    color: var(--text-primary);
    font-weight: 500;
    font-size: var(--skill-base-font);
    line-height: 1.4;
    white-space: nowrap;
    cursor: default;
    /* 只过渡与 GSAP 无关的属性；transform 由 GSAP 直接写入，不能加过渡 */
    transition: background-color 0.2s ease, border-color 0.2s ease, scale 0.2s ease;
}

.skill-tag.level-1 {
    font-size: calc(var(--skill-base-font) * var(--skill-scale-1));
    font-weight: 700;
    border-color: var(--border-strong);
}
.skill-tag.level-2 { font-size: calc(var(--skill-base-font) * var(--skill-scale-2)); }
.skill-tag.level-3 { font-size: calc(var(--skill-base-font) * var(--skill-scale-3)); }
.skill-tag.level-4 {
    font-size: calc(var(--skill-base-font) * var(--skill-scale-4));
    opacity: 0.8;
}

/* 用独立的 scale 属性做悬停放大，避免覆盖 GSAP 写入的 transform 导致标签跳位 */
.skill-tag:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.5);
    scale: 1.06;
    z-index: 10;
}

/* 降级路径：GSAP 不可用（或用户开启了"减少动态效果"）时，
   技能图谱回落为普通居中的标签云，内容完整可见 */
html:not(.gsap-ready) .skills-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 14px 16px;
    align-items: center;
    justify-content: center;
    padding: 24px 0;
}
html:not(.gsap-ready) .skill-tag { position: static; }
html:not(.gsap-ready) .skill-tag:hover { scale: none; }

/* --- 工作经历 --- */
.exp-item { margin-bottom: 100px; }

.exp-row {
    display: flex;
    justify-content: space-between;
    gap: 50px;
    align-items: center;
}

/* media-left：把配图翻到左侧，DOM 顺序不变 */
.exp-row.media-left { flex-direction: row-reverse; }

.exp-text { flex: 1; min-width: 300px; }
.exp-text h3 { font-size: 2rem; margin-bottom: 10px; }
.exp-text .date { display: block; color: var(--accent-color); margin-bottom: 20px; font-weight: bold; }
.exp-text p { color: var(--text-secondary); }

.exp-media { flex: 1; min-width: 300px; }

.exp-media img {
    width: 100%;
    height: auto;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

/* --- 工作详情列表 --- */
.job-details {
    list-style-type: disc;
    padding-left: 20px;
    margin-top: 15px;
}

.job-details li {
    margin-bottom: 10px;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.role-desc {
    color: var(--accent-color);
    font-weight: bold;
    margin-bottom: 15px;
    display: block;
}

/* --- 精选项目网格 --- */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    padding: 20px 0;
}

.project-card {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 15px;
    border: 1px solid var(--border-subtle);
    transition: transform 0.3s, border-color 0.3s;
}

.project-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-color);
}

.project-card h3 {
    font-size: 1.5rem;
    margin-bottom: 10px;
}

.tech-stack {
    display: inline-block;
    font-size: 0.8rem;
    background: #333;
    padding: 4px 10px;
    border-radius: 4px;
    color: #ddd;
    margin-bottom: 15px;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

/* --- 教育背景 --- */
.education-card {
    background: var(--card-bg);
    padding: 40px;
    border-radius: 20px;
    text-align: center;
    border: 1px solid var(--border-subtle);
}

.education-card h3 { font-size: 2rem; margin-bottom: 10px; }
.education-card .degree { color: var(--text-secondary); margin-bottom: 10px; }

.achievements {
    text-align: left;
    margin-top: 40px;
    display: grid;
    gap: 30px;
}

.achievement-item {
    border-left: 3px solid var(--accent-color);
    padding-left: 20px;
}

.achievement-item h4 { font-size: 1.3rem; margin-bottom: 5px; }
.achievement-item p { color: var(--text-secondary); }

.honor-list {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 30px;
    margin-top: 30px;
    font-size: 1.1rem;
    color: var(--text-secondary);
}

/* 教育配图：自适应网格，窄图不再被拉伸到整屏宽 */
.edu-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 40px;
    align-items: start;
}

/* --- 页尾 --- */
.footer {
    min-height: 50vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: #050505;
}

.footer .container { width: 100%; }
.footer h2 { font-size: 2rem; margin-bottom: 10px; }
.footer > .container > p { color: var(--text-secondary); }

.email-link {
    font-size: 2rem;
    font-weight: bold;
    display: block;
    margin: 20px 0;
    word-break: break-all;
}
.email-link:hover { color: var(--accent-color); }

.social-links { color: var(--text-secondary); }
.copyright { color: #555; font-size: 0.8rem; margin-top: 50px; }

/* --- 页尾彩蛋 ---
   不用 .section（它带 min-height: 100vh），否则页尾会多出一整屏空白。
   默认态是"可见"；只有 html.egg-ready（JS 已挂上 IntersectionObserver）
   才把卡片切到隐藏初态，等滚到底部再淡入。 */
.egg-section {
    padding: 0 0 80px;
    background: #050505;
}

.egg-card {
    max-width: 720px;
    margin: 0 auto;
    padding: 32px 36px;
    text-align: center;
    /* 暖调染色的深色卡片：与全站中性色卡片区分开，一眼看出是"彩蛋" */
    background-color: #17120f;
    background-image: radial-gradient(120% 100% at 50% 0%, rgba(255, 105, 0, 0.09), transparent 70%);
    border: 1px dashed rgba(255, 105, 0, 0.38);
    border-radius: 16px;
}

.egg-eyebrow {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 0.8rem;
    letter-spacing: 2px;
    color: var(--accent-color);
    margin-bottom: 12px;
}

.egg-title {
    font-size: 1.75rem;
    letter-spacing: 4px;
    margin-bottom: 14px;
}

.egg-lead {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 22px;
}

.egg-address {
    display: inline-block;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 1.05rem;
    letter-spacing: 0.5px;
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-medium);
    border-radius: 10px;
    padding: 10px 18px;
    margin-bottom: 18px;
    /* 窄屏下地址不换行会把卡片撑破 */
    max-width: 100%;
    word-break: break-all;
}

.egg-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
    margin-bottom: 28px;
}

.egg-enter,
.egg-copy {
    font: inherit;
    font-size: 0.9rem;
    padding: 9px 20px;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.25s ease, color 0.25s ease, border-color 0.25s ease;
}

.egg-enter {
    font-weight: 700;
    color: var(--bg-color);
    background: var(--accent-color);
    border: 1px solid var(--accent-color);
}

.egg-enter:hover,
.egg-enter:focus-visible {
    background: #ff8333;
    border-color: #ff8333;
}

.egg-copy {
    color: var(--text-secondary);
    background: transparent;
    border: 1px solid var(--border-medium);
    /* 固定宽度：文案在"复制地址 / 已复制 / 复制失败"之间切换时不抖动 */
    min-width: 112px;
}

.egg-copy:hover,
.egg-copy:focus-visible {
    color: var(--text-primary);
    border-color: var(--border-strong);
}

.egg-copy.is-done {
    color: var(--accent-color);
    border-color: var(--accent-color);
}

.egg-notes {
    display: grid;
    gap: 8px;
    padding-top: 20px;
    text-align: left;
    border-top: 1px dashed var(--border-medium);
}

.egg-notes li {
    position: relative;
    padding-left: 20px;
    font-size: 0.88rem;
    color: var(--text-secondary);
}

.egg-notes li::before {
    content: '◆';
    position: absolute;
    left: 0;
    top: 0.32em;
    font-size: 0.62rem;
    color: var(--accent-color);
}

/* 两条声明是这个框的重点，比说明文字更亮一档 */
.egg-notes strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* 揭示：先挂观察者再加 .egg-ready，滚动到底部时由 JS 补 .is-visible */
html.egg-ready .egg-card {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.6s ease, transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

html.egg-ready .egg-card.is-visible {
    opacity: 1;
    transform: none;
}

/* 双保险：即便 egg-ready 被加上，也不隐藏卡片 */
@media (prefers-reduced-motion: reduce) {
    html.egg-ready .egg-card {
        opacity: 1;
        transform: none;
        transition: none;
    }
}

/* --- 占位组件（补图后即可替换为 <img>） --- */
.hero-placeholder,
.media-placeholder {
    width: 100%;
    background: linear-gradient(135deg, #1a1a1a, #2a2a2a);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-medium);
    color: #555;
    letter-spacing: 2px;
    text-align: center;
    padding: 20px;
}

.hero-placeholder { height: 300px; font-size: 1.5rem; }
.media-placeholder { aspect-ratio: 4 / 3; font-size: 0.95rem; letter-spacing: 1px; }

/* --- 项目详情入口按钮 --- */
.project-more {
    display: inline-block;
    margin-top: 18px;
    padding: 8px 16px;
    font: inherit;
    font-size: 0.9rem;
    color: var(--accent-color);
    background: transparent;
    border: 1px solid var(--accent-color);
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.25s ease, color 0.25s ease;
}

.project-more:hover,
.project-more:focus-visible {
    background: var(--accent-color);
    color: var(--bg-color);
}

/* --- 项目详情弹窗 ---
   fixed 定位 + hidden 显隐：完全脱离文档流，因此不影响 .projects-grid 的网格布局。 */
.modal {
    position: fixed;
    inset: 0;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.modal[hidden] { display: none; }

.modal-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(4px);
}

.modal-panel {
    position: relative;
    width: 100%;
    max-width: 680px;
    /* 内容偏长的项目（如 RC-KIT）在面板内滚动，面板本身不超出视口 */
    max-height: min(85vh, 760px);
    overflow-y: auto;
    background: var(--card-bg);
    border: 1px solid var(--border-medium);
    border-radius: 16px;
    padding: 36px;
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.6);
}

.modal-close {
    position: absolute;
    top: 14px;
    right: 14px;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    line-height: 1;
    color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--border-medium);
    border-radius: 50%;
    cursor: pointer;
    transition: color 0.2s ease, background-color 0.2s ease;
}

.modal-close:hover,
.modal-close:focus-visible {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.14);
}

/* --- 弹窗内容排版 --- */
.modal-body { padding-right: 12px; }

.modal-eyebrow {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 0.8rem;
    color: var(--accent-color);
    letter-spacing: 0.5px;
    margin-bottom: 8px;
}

.modal-body h3 {
    font-size: 1.6rem;
    line-height: 1.3;
    margin-bottom: 22px;
}

.modal-body h4 {
    font-size: 0.95rem;
    color: var(--accent-color);
    letter-spacing: 1px;
    margin: 22px 0 10px;
    padding-left: 10px;
    border-left: 3px solid var(--accent-color);
}

.modal-body p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.modal-body ul {
    list-style: disc;
    padding-left: 20px;
}

.modal-body li {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 10px;
}

.modal-body li::marker { color: var(--accent-color); }

/* 打开动效：移除 hidden 时会自动重播 */
.modal:not([hidden]) .modal-overlay { animation: modalFade 0.25s ease; }
.modal:not([hidden]) .modal-panel { animation: modalRise 0.3s cubic-bezier(0.22, 1, 0.36, 1); }

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

@keyframes modalRise {
    from { opacity: 0; transform: translateY(18px) scale(0.98); }
    to { opacity: 1; transform: none; }
}

/* 弹窗打开时锁定背景滚动 */
body.modal-open { overflow: hidden; }

@media (prefers-reduced-motion: reduce) {
    .modal * { animation: none !important; }
}