/* --- 全局与基础样式 --- */

:root {
  /* 颜色变量 */
  --color-bg: #ffffff;
  --color-text: #333333;
  --color-primary: #007bff;
  --color-primary-hover: #0056b3;
  --color-border: #eeeeee;
  --color-subtle: #666666;
  --color-card-bg: #f8f9fa;
  --font-body: 'Helvetica Neue', 'Arial', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  /* 整体淡入动画保留，但具体元素的动画将更加精细 */
  animation: fadeIn 0.5s ease-out forwards;
}

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

.container {
  max-width: 960px;
  margin-left: auto;
  margin-right: auto;
  padding: 0 1.5rem;
}

h1,
h2 {
  line-height: 1.2;
  margin-bottom: 1rem;
}

h1 {
  font-size: 2.5rem;
  font-weight: 700;
}

h2 {
  font-size: 2rem;
  font-weight: 600;
  text-align: center;
  margin-bottom: 2.5rem;
  position: relative;
}

h2::after {
  content: '';
  position: absolute;
  bottom: -0.5rem;
  left: 50%;
  transform: translateX(-50%);
  width: 50px;
  height: 3px;
  background-color: var(--color-primary);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.3s ease;
}

a:hover {
  color: var(--color-primary-hover);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

ul {
  list-style: none;
}

/* --- 站点头部/导航 --- */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  padding: 1rem 0;
  background-color: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 100;
  box-shadow: 0 1px 10px rgba(0, 0, 0, 0.05);
  transition: box-shadow 0.3s ease;
}

.nav {
  display: flex;
  justify-content: center;
  gap: 2rem;
}

.nav a {
  color: var(--color-text);
  font-weight: 500;
  position: relative;
  padding-bottom: 0.25rem;
}

.nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: width 0.3s ease;
}

.nav a:hover::after {
  width: 100%;
}

/* 顶部导航：轻底边指示条（手机端优先） */
.nav { gap: 1.25rem; }
.nav a { position: relative; padding: 0.4rem 0.1rem; }
.nav a::after { content: ""; position: absolute; left: 20%; right: 20%; bottom: -0.2rem; height: 2px; background: transparent; border-radius: 2px; transition: background 0.2s ease, transform 0.2s ease; transform: scaleX(0.9); }
@media (max-width: 480px) {
  .nav { gap: 1rem; }
  .nav a { padding: 0.55rem 0.1rem; }
  .nav a::after { height: 2px; bottom: -0.25rem; }
  /* 移动端显式使用轻底边指示条 */
  .nav a:hover::after, .nav a.active::after { background: rgba(0,123,255,0.7); }
}

/* --- 英雄区 --- */
.hero {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  min-height: 100vh;
  padding-top: 80px; /* 补偿导航栏高度 */
  padding-bottom: 4rem;
  /* 新增：优雅的渐变背景 */
  background: linear-gradient(135deg, #f5f7fa 0%, #e9f0f7 100%);
  overflow: hidden; /* 防止动画元素溢出 */
}

/* 顶部与首屏留白、标题与图片层次 */
.site-header { padding: 1rem 0.2rem; }
.hero { padding-top: 96px; }
.hero h1 { margin-top: 1.15rem; font-size: 2rem; }
.hero .subtitle { margin-top: 0.25rem; font-size: 1.06rem; color: var(--color-subtle); }
@media (max-width: 480px) {
  .hero { padding-top: 104px; }
  .hero h1 { margin-top: 1.25rem; font-size: 1.9rem; }
  .hero .subtitle { font-size: 1rem; margin-bottom: 0.8rem; }
}

/* Hero 结构细化与手机端左对齐 */
.hero { text-align: left; }
.hero .hero-content { width: 100%; max-width: 960px; padding: 0 1rem; margin: 0 auto; }
.hero h1 { margin-top: 0.8rem; }
@media (max-width: 480px) {
  .hero h1 { margin-top: 1rem; font-size: 1.8rem; }
  .hero .subtitle { margin-bottom: 1rem; font-size: 1.05rem; }
  .hero-cta { gap: 0.5rem; }
  .hero-cta .btn { padding: 0.42rem 0.75rem; font-size: 0.86rem; border-radius: 10px; }
}

/* 头像展示优化：更好的可视裁切 */
.hero .avatar {
  width: min(96vw, 480px);
  height: auto;
  object-fit: contain; /* 尽可能不裁切，完整展示 */
  object-position: center 45%;
  border: 0;
  border-radius: 0;
  box-shadow: none; /* 无框、无阴影的嵌入式风格 */
  background: transparent;
  /* 渐变遮罩更柔和，羽化更宽，营造无缝融入感（焦点略上移） */
  -webkit-mask-image: radial-gradient(150% 145% at 50% 40%, #000 52%, rgba(0,0,0,0) 92%);
          mask-image: radial-gradient(150% 145% at 50% 40%, #000 52%, rgba(0,0,0,0) 92%);
  -webkit-mask-repeat: no-repeat; mask-repeat: no-repeat;
  -webkit-mask-size: 100% 100%; mask-size: 100% 100%;
}

@media (min-width: 769px) {
  .hero .avatar {
    width: min(38vw, 500px);
    -webkit-mask-image: radial-gradient(145% 135% at 50% 42%, #000 54%, rgba(0,0,0,0) 92%);
            mask-image: radial-gradient(145% 135% at 50% 42%, #000 54%, rgba(0,0,0,0) 92%);
  }
}

/* 如需无边框嵌入式风格，可切换为： */
/* .hero .avatar { border-radius: 0; box-shadow: none; } */

.hero h1,
.hero .subtitle,
/* 新增：为新元素添加动画准备 */
.hero .location,
.hero .hero-about,
.hero .hero-cta {
  /* 为动画做准备 */
  opacity: 0;
  transform: translateY(20px);
}

.hero h1 {
  /* 新增：入场动画 */
  animation: fadeInUp 0.8s 0.2s cubic-bezier(0.25, 1, 0.5, 1) forwards;
}

.hero .subtitle {
  font-size: 1.2rem;
  color: var(--color-subtle);
  margin-bottom: 2rem;
  /* 修改：调整动画延迟 */
  animation: fadeInUp 0.8s 0.3s cubic-bezier(0.25, 1, 0.5, 1) forwards;
}

/* 新增：地区样式 */
.hero .location {
  color: var(--color-subtle);
  margin-bottom: 1.5rem;
  animation: fadeInUp 0.8s 0.4s cubic-bezier(0.25, 1, 0.5, 1) forwards;
}

/* 新增：英雄区内的“关于我”样式 */
.hero-about {
  max-width: 600px;
  margin: 0 auto 2rem;
  animation: fadeInUp 0.8s 0.5s cubic-bezier(0.25, 1, 0.5, 1) forwards;
}
.hero-about p {
  font-size: 1.1rem;
  color: var(--color-subtle);
  line-height: 1.8;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
  /* 修改：调整动画延迟 */
  animation: fadeInUp 0.8s 0.7s cubic-bezier(0.25, 1, 0.5, 1) forwards;
}

.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: 50px;
  font-weight: 500;
  transition: all 0.3s ease;
  border: 2px solid transparent;
}

.btn.primary {
  background-color: var(--color-primary);
  color: #fff;
}
.btn.primary:hover {
  background-color: var(--color-primary-hover);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 4px 10px rgba(0, 123, 255, 0.3);
}

.btn.ghost {
  border-color: var(--color-primary);
  color: var(--color-primary);
}
.btn.ghost:hover {
  background-color: var(--color-primary);
  color: #fff;
}

/* 新增：入场动画定义 */
@keyframes scaleIn {
  from {
    transform: scale(0.5);
    opacity: 0;
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}

@keyframes fadeInUp {
  from {
    transform: translateY(20px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

/* --- 内容区域通用样式 --- */
section {
  padding: 5rem 0;
}

section:nth-of-type(odd) {
  background-color: var(--color-card-bg);
}

/* 移除：删除旧的“关于我”区域样式 */

/* --- 技能展示 --- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 1.5rem;
  text-align: center;
}

.skill {
  background-color: var(--color-bg);
  padding: 1.5rem 1rem;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.03);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.skill:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
}

/* 竖向 Banner 样式（Skills 区重构） */
.banners { display: grid; grid-template-columns: 1fr; gap: 1rem; }
.banner {
  background: linear-gradient(180deg, #ffffff 0%, #fbfcfe 100%);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 1rem;
  box-shadow: inset 0 -1px 0 rgba(0,0,0,0.04), 0 4px 16px rgba(0,0,0,0.06);
}
.banner h3 { margin-bottom: 0.25rem; font-size: 1.1rem; }
.banner p { color: var(--color-subtle); font-size: 0.95rem; }
.banner h3 { display: flex; align-items: center; gap: 0.45rem; }
.banner h3 .i { width: 18px; height: 18px; color: var(--color-primary); display: inline-flex; align-items: center; justify-content: center; }
.banner + .banner { margin-top: 0; }
@media (min-width: 769px) {
  .banners { gap: 1.25rem; }
  .banner { padding: 1.25rem; }
}

/* Banner 内文与经历列表的可读性优化 */
.banners .banner p { line-height: 1.85; text-wrap: balance; }
.experience-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.55rem; }
.experience-list li { position: relative; padding-left: 1.05rem; line-height: 1.9; text-wrap: balance; }
.experience-list li::before { content: ""; position: absolute; left: 0.2rem; top: 0.85em; width: 6px; height: 6px; border-radius: 50%; background: var(--color-primary); box-shadow: 0 0 0 3px rgba(0,123,255,0.10); }
/* 用于防止“单个字”独占一行 */
.nowrap { white-space: nowrap; }

/* 通用要点列表样式 */
.bullet-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.5rem; }
.bullet-list li { position: relative; padding-left: 1rem; line-height: 1.85; text-wrap: balance; }
.bullet-list li::before { content: ""; position: absolute; left: 0.2rem; top: 0.8em; width: 6px; height: 6px; border-radius: 50%; background: var(--color-primary); box-shadow: 0 0 0 3px rgba(0,123,255,0.10); }

/* --- 联系方式 --- */
.contact .container {
  max-width: 600px;
  text-align: center;
}

.contact-list {
  margin: 2rem 0;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact-list li {
  font-size: 1.1rem;
}
.contact-list li span:first-child {
  font-weight: 500;
}
/* 新增：微信同号提示样式 */
.contact-list .wechat-notice {
  color: var(--color-subtle);
  font-size: 0.9rem;
  margin-left: 0.5rem;
}

/* 联系方式对齐布局（固定三列，单行左对齐，更紧凑） */
.contact-list { text-align: left; }
.contact-list li { display: grid; grid-template-columns: 4rem auto 1.2rem; align-items: center; column-gap: 0; }
.contact-list .label { color: var(--color-text); white-space: nowrap; }
.contact-list .value { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.contact-list .value a { color: var(--color-text); display: inline-block; max-width: 100%; vertical-align: middle; }
.copy-btn { width: 1.2rem; height: 1.2rem; padding: 0; display: inline-flex; align-items: center; justify-content: center; }
/* 覆盖通用按钮的左外边距，让按钮紧贴文本 */
.contact-list .copy-btn { margin-left: 1.4ch; width: 1.1rem; height: 1.1rem; }
.contact-list .copy-btn .icon { width: 14px; height: 14px; }
/* 复制按钮：浅色圆润方块（浅底、细边、悬停微加深） */
.copy-btn {
  margin-left: 0.5rem;
  padding: 0.32rem 0.56rem;
  border-radius: 8px;
  border: 1px solid #E6E8EF;
  background: #F7F8FB;
  color: var(--color-primary);
  display: inline-flex; align-items: center; justify-content: center;
  transition: background 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
  box-shadow: 0 1px 2px rgba(0,0,0,0.03);
}
.copy-btn:hover { background: #EEF2F7; border-color: #D9DBE1; box-shadow: 0 2px 6px rgba(0,0,0,0.06); }
.copy-btn:active { background: #E7EBF2; }
.copy-btn .icon { display:block; }

/* 联系方式定位与距离（恢复为绝对 right 偏移） */
.contact-list li { position: relative; }
.contact-list .value { position: relative; padding-right: 1.8rem; }
.contact-list .copy-btn { position: absolute; right: 12.35ch; top: 50%; transform: translateY(-50%); }
.contact-list li:nth-child(2) .copy-btn { right: 12.55ch; }
.contact-list li:not(:nth-child(2)) .copy-btn { right: 12.35ch; }
@media (max-width: 480px) {
  .contact-list .value { padding-right: 1.6rem; }
  .contact-list .copy-btn { right: 11.05ch; }
  .contact-list li:nth-child(2) .copy-btn { right: 11.2ch; }
  .contact-list li:not(:nth-child(2)) .copy-btn { right: 11.05ch; }
}

/* 移除：删除二维码相关样式 */

/* --- 站点页脚 --- */
/* 页脚：极简细线+浅色文本，替换厚重色块 */
.site-footer {
  text-align: center;
  padding: 1rem 0; /* 更轻的高度 */
  background: transparent; /* 去掉深色色块 */
  border-top: 1px solid #ECEFF4; /* 细分隔线 */
  color: #7a7f87; /* 更柔和的文字颜色 */
}
.site-footer p { font-size: 0.88rem; margin: 0; }

/* 复制按钮：深色实心图标，提升可点性 */
.copy-btn { color: #333; border-color: #e2e2e2; }
.copy-btn:hover { background: #f1f2f4; }
.copy-btn .icon { fill: currentColor; }

.toast {
  position: fixed;
  left: 50%;
  bottom: 18px;
  transform: translateX(-50%);
  padding: 10px 16px;
  background: rgba(0,0,0,0.75);
  color: #fff;
  border-radius: 8px;
  font-size: 0.9rem;
  opacity: 0; pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(-2px); }

/* 二维码卡片（裁切显示整码） */
.qrcode-card { 
  margin-top: 1.5rem; 
  display: flex; 
  flex-direction: column; 
  align-items: center; 
  gap: 0.5rem; 
}
.qrcode-img {
  width: 100%;
  max-width: 680px; /* 桌面上限更大 */
  aspect-ratio: 1 / 1;
  object-fit: contain; /* 确保不变形，完整显示二维码 */
  image-rendering: pixelated; /* 保持二维码清晰 */
  border-radius: 0;
  border: 0;
  background: transparent;
  padding: 0; /* 去掉白边，仅放大二维码本体 */
}
.qrcode-card small { color: var(--color-subtle); }

/* --- 响应式设计 --- */
@media (max-width: 768px) {
  h1 {
    font-size: 2rem;
  }
  h2 {
    font-size: 1.8rem;
  }
  .hero {
    min-height: auto;
    padding: 8rem 0 4rem;
  }

  .nav {
    gap: 1.5rem;
  }
  .skills-grid {
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: 1rem;
  }
}

@media (max-width: 480px) {
  /* 新增：调整英雄区内边距，为新内容提供空间 */
  .hero {
    padding: 6rem 0 3rem;
  }
  .hero-cta {
    flex-direction: column;
  }
  .skill {
    padding: 1rem 0.5rem;
  }
  /* 移除：删除针对二维码的响应式调整 */
  /* 调整英雄区按钮在移动端的尺寸与间距 */
  .hero-cta { gap: 0.6rem; }
  .hero-cta .btn { padding: 0.48rem 0.85rem; font-size: 0.9rem; }
  /* 头像全宽贴边，不裁切 */
  .hero .avatar { width: 100vw; max-width: none; margin-left: calc(50% - 50vw); }
  /* 新增：收紧联系方式容器左右留白，让二维码更靠近满宽 */
  .contact .container { padding-left: 0.5rem; padding-right: 0.5rem; }
}