/* ============================================
   栾宜伟 - 个人简历网站样式表
   技术栈：HTML5 + CSS3 + Vanilla JS
   ============================================ */

:root {
  /* 主霓虹色（青蓝）与深色背景 */
  --neon-primary: #22d3ee;
  --neon-primary-rgb: 34, 211, 238;
  --neon-primary-dim: rgba(var(--neon-primary-rgb), 0.15);
  --bg-color: #020617;
  --bg-dark: #0f172a;
  --card-bg-rgb: 15, 23, 42;
  --card-bg-dark: rgba(var(--card-bg-rgb), 0.85);
  --slate-rgb: 148, 163, 184;
  --card-border-dark: rgba(var(--slate-rgb), 0.25);
  --text-light-rgb: 226, 232, 240;
  --text-light: #e2e8f0;

  /* 渐变：仅保留 1 个主渐变 + 1 个轻微辅助 */
  --gradient-primary: linear-gradient(135deg, var(--bg-color) 0%, var(--bg-dark) 40%, rgba(var(--neon-primary-rgb), 0.12) 100%);
  --gradient-accent: linear-gradient(135deg, rgba(var(--neon-primary-rgb), 0.2), rgba(var(--neon-primary-rgb), 0.05));

  /* 文字与背景（深色主题） */
  --text-primary: #E5E7EB;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;

  /* 阴影与边框 */
  --shadow-soft: 0 10px 30px rgba(0, 0, 0, 0.35);
  --shadow-strong: 0 20px 45px rgba(0, 0, 0, 0.5);
  --border-subtle: 1px solid var(--card-border-dark);

  /* 尺寸与圆角 */
  --radius-lg: 1.5rem;
  --radius-md: 1rem;
  --radius-pill: 999px;

  /* 动画 */
  --transition-fast: 0.2s ease-out;
  --transition-normal: 0.3s ease-out;
  --transition-slow: 0.45s ease-out;

  /* 字体 */
  --font-zh: "PingFang SC", "Microsoft YaHei", system-ui, -apple-system,
    BlinkMacSystemFont, sans-serif;
  --font-en: "Fira Code", "JetBrains Mono", ui-monospace, SFMono-Regular,
    Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  --font-script: "Dancing Script", "Satisfy", cursive;
  --font-slogan: "Long Cang", "Ma Shan Zheng", "KaiTi", "STKaiti", serif;
}

/* ========== 全局 Reset 与基础排版 ========== */

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-zh);
  color: var(--text-primary);
  background-color: var(--bg-color);
  -webkit-font-smoothing: antialiased;
}

/* 全屏 Navier-Stokes 流体模拟 Canvas，不阻挡点击 */
#ripple-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
  mix-blend-mode: screen;
}

/* 保证主内容在水纹层之上 */
#hero,
.section,
#footer {
  position: relative;
  z-index: 2;
}

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

a {
  color: inherit;
  text-decoration: none;
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--neon-primary);
  outline-offset: 2px;
}

button {
  font-family: inherit;
  border: none;
  background: none;
  cursor: pointer;
}

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

p {
  margin: 0;
  color: var(--text-secondary);
  line-height: 1.7;
}

h1,
h2,
h3,
h4,
h5 {
  margin: 0;
  font-weight: 700;
  letter-spacing: 0.03em;
}

/* 通用布局容器 */
.section {
  padding: 5rem 1.5rem;
}

/* 锚点目标预留导航栏高度，避免标题被遮挡 */
#education,
#experience,
#projects,
#skills,
#interests,
#footer {
  scroll-margin-top: 5.5rem;
}

.section-container {
  max-width: 1120px;
  margin: 0 auto;
}

.section-title {
  font-size: 2rem;
  text-align: center;
  margin-bottom: 3rem;
  color: var(--text-primary);
  font-weight: 700;
  position: relative;
}

.section-title::after {
  content: "";
  display: block;
  width: 72px;
  height: 3px;
  margin: 0.75rem auto 0;
  border-radius: 999px;
  background: var(--neon-primary);
  box-shadow: 0 0 12px var(--neon-primary);
}

.tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.15rem 0.6rem;
  margin-right: 0.35rem;
  border-radius: var(--radius-pill);
  font-size: 0.75rem;
  background: var(--neon-primary-dim);
  color: var(--neon-primary);
  border: 1px solid rgba(var(--neon-primary-rgb), 0.35);
}

.badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-pill);
  font-size: 0.8rem;
  font-weight: 500;
  background: var(--neon-primary);
  color: var(--bg-color);
  box-shadow: 0 0 16px rgba(var(--neon-primary-rgb), 0.5);
}

/* 滚动淡入动画基类 */
.fade-in-up {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity var(--transition-normal), transform var(--transition-normal);
  will-change: opacity, transform;
}

.fade-in-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ========== 导航栏 ========== */

#navbar {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(22px);
  background: linear-gradient(
    to bottom,
    rgba(var(--card-bg-rgb), 0.85),
    rgba(var(--card-bg-rgb), 0.55),
    transparent
  );
  border-bottom: 1px solid rgba(var(--slate-rgb), 0.32);
  transition: background var(--transition-normal), box-shadow var(--transition-normal),
    border-color var(--transition-normal), transform 0.2s ease-out;
}

#navbar.scrolled {
  background: rgba(var(--card-bg-rgb), 0.98);
  box-shadow: 0 16px 30px rgba(var(--card-bg-rgb), 0.36);
  border-color: rgba(var(--slate-rgb), 0.5);
}

.nav-container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 1.25rem 1.5rem 0.85rem;
  padding-left: 0.75rem;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 1.5rem;
}

.nav-logo {
  grid-column: 1;
  justify-self: start;
  font-family: var(--font-script);
  font-weight: 600;
  font-size: 3.2rem;
  letter-spacing: 0.02em;
  color: rgba(var(--text-light-rgb), 0.95);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.nav-logo::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: var(--neon-primary);
  box-shadow: 0 0 12px var(--neon-primary);
  opacity: 0.9;
}

.nav-links {
  grid-column: 2;
  justify-self: center;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  font-size: 1.08rem;
  font-weight: 400;
  letter-spacing: 0.06em;
}

.nav-links a {
  position: relative;
  color: rgba(203, 213, 245, 0.85);
  padding-bottom: 0.15rem;
  transition: color var(--transition-fast);
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.2rem;
  width: 100%;
  height: 1px;
  border-radius: 999px;
  background: var(--neon-primary);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform var(--transition-fast);
}

.nav-links a:hover {
  color: var(--text-light);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  transform: scaleX(1);
}

.nav-toggle {
  grid-column: 3;
  justify-self: end;
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 999px;
  border: 1px solid rgba(var(--slate-rgb), 0.7);
  align-items: center;
  justify-content: center;
  color: var(--text-light);
  background: radial-gradient(
    circle at top left,
    rgba(129, 140, 248, 0.35),
    rgba(var(--card-bg-rgb), 0.9)
  );
  box-shadow: 0 10px 25px rgba(var(--card-bg-rgb), 0.5);
}

.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background-color: var(--text-primary);
  position: relative;
  transition: transform 0.24s ease, opacity 0.24s ease, top 0.24s ease,
    bottom 0.24s ease;
}

.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
}

.nav-toggle span::before {
  top: -6px;
}

.nav-toggle span::after {
  bottom: -6px;
}

.nav-toggle.is-open span {
  transform: rotate(45deg);
}

.nav-toggle.is-open span::before {
  top: 0;
}

.nav-toggle.is-open span::after {
  bottom: 0;
  transform: rotate(-90deg);
}

/* ========== Hero 首屏 ========== */

#hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6rem 1.5rem 4rem;
  overflow: hidden;
  color: var(--text-primary);
  /* 还原原先蓝色设计 */
  background: var(--gradient-primary);
  background-size: 260% 260%;
  animation: gradient-flow 18s ease infinite;
}

/* 仅边缘：渐变 + 雾面（中心透明，只显示四边） */
#hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  /* 边缘渐变：左侧淡绿、右侧淡蓝/青，参考图示风格 */
  background: linear-gradient(
      90deg,
      rgba(45, 65, 55, 0.35) 0%,
      transparent 22%,
      transparent 78%,
      rgba(40, 70, 80, 0.35) 100%
    ),
    linear-gradient(
      180deg,
      rgba(50, 70, 65, 0.25) 0%,
      transparent 20%,
      transparent 80%,
      rgba(45, 65, 70, 0.2) 100%
    );
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  /* 仅边缘可见：中心镂空，保留原有蓝色 */
  mask-image: radial-gradient(
    ellipse 85% 80% at 50% 50%,
    transparent 50%,
    black 72%,
    black 100%
  );
  -webkit-mask-image: radial-gradient(
    ellipse 85% 80% at 50% 50%,
    transparent 50%,
    black 72%,
    black 100%
  );
}

#hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  /* 仅底部与下一节的蓝色过渡 */
  background: linear-gradient(
    to top,
    rgba(var(--neon-primary-rgb), 0.15),
    transparent 80px
  );
  /* 底部条不参与边缘 mask，全宽显示 */
  mask-image: linear-gradient(to top, black 80px, transparent 80px);
  -webkit-mask-image: linear-gradient(to top, black 80px, transparent 80px);
}

@keyframes gradient-flow {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

#particle-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 999;
}

#fighter-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

.hero-card {
  position: relative;
  width: 100%;
  max-width: 560px;
  margin: 0 auto;
  padding: 2rem 2.25rem 2.25rem;
  border-radius: var(--radius-lg);
  background: rgba(var(--card-bg-rgb), 0.75);
  border: 1px solid rgba(var(--slate-rgb), 0.2);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.35), 0 0 0 1px rgba(255, 255, 255, 0.03);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  opacity: 0;
  transform: translateY(24px) scale(0.98);
  animation: hero-card-enter 0.9s cubic-bezier(0.22, 1, 0.36, 1) 0.25s forwards;
  transition: box-shadow var(--transition-normal), transform var(--transition-normal),
    border-color var(--transition-normal);
}

.hero-card:hover {
  box-shadow: 0 24px 56px rgba(0, 0, 0, 0.4), 0 0 80px rgba(var(--neon-primary-rgb), 0.24);
  border-color: rgba(var(--neon-primary-rgb), 0.25);
  transform: translateY(-2px) scale(1.005);
}

.hero-card .hero-title--outline {
  animation: hero-title-glow 4s ease-in-out infinite;
}

.hero-card .hero-label {
  animation: hero-label-fade 0.8s ease-out 0.5s both;
}

.hero-card .hero-subtitle {
  animation: hero-subtitle-fade 0.7s ease-out 0.6s both;
}

.hero-card .hero-meta {
  animation: hero-meta-fade 0.7s ease-out 0.75s both;
}

.hero-card .hero-info {
  animation: hero-info-fade 0.8s ease-out 0.9s both;
}

@keyframes hero-card-enter {
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes hero-title-glow {
  0%, 100% {
    filter: drop-shadow(0 0 24px rgba(var(--neon-primary-rgb), 0.2));
  }
  50% {
    filter: drop-shadow(0 0 40px rgba(var(--neon-primary-rgb), 0.35));
  }
}

@keyframes hero-label-fade {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes hero-subtitle-fade {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes hero-meta-fade {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes hero-info-fade {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-inner {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  max-width: 720px;
  margin: 0 auto;
  width: 100%;
  padding: 0 1.5rem;
}

/* 首屏居中单栏（参考 THE BAND CALLED IT） */
.hero-content--center {
  flex: none;
  width: 100%;
  text-align: center;
  max-width: 560px;
}

.hero-content--center .hero-label {
  display: block;
  margin-bottom: 0.6rem;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--text-muted);
  font-family: var(--font-en);
}

/* 描边主标题 */
.hero-title--outline {
  -webkit-text-stroke: 2px rgba(var(--text-light-rgb), 0.9);
  color: transparent;
  font-size: clamp(2.4rem, 6vw, 3.6rem);
  line-height: 1.1;
  margin-bottom: 0.5rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-family: var(--font-en);
  font-weight: 700;
}

.hero-title--outline .caret {
  -webkit-text-stroke: 2px rgba(var(--neon-primary-rgb), 0.95);
  animation: caret-blink 0.9s step-end infinite;
}

.hero-meta {
  margin: 1rem 0 1.25rem;
  text-align: center;
  max-width: 400px;
  margin-left: auto;
  margin-right: auto;
}

.hero-meta-row {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin: 0.35rem 0;
  font-family: var(--font-en);
}

.hero-meta-row strong {
  color: var(--text-muted);
  font-weight: 500;
  letter-spacing: 0.08em;
}

.hero-meta-row a {
  color: rgba(var(--neon-primary-rgb), 0.95);
  transition: color var(--transition-fast);
}

.hero-meta-row a:hover {
  color: var(--neon-primary);
}

.hero-info {
  font-size: 0.92rem;
  line-height: 1.65;
  color: var(--text-secondary);
  max-width: 520px;
  margin: 0 auto;
  text-align: justify;
}

/* 个人 Slogan：英文艺术字体（Playfair Display）+ 鼠标排斥，两行且尽可能大 */
.hero-slogan {
  font-family: "Playfair Display", Georgia, "Times New Roman", serif;
  font-size: clamp(0.875rem, 2.5vmin, 1.75rem);
  font-weight: 400;
  font-style: italic;
  letter-spacing: 0.02em;
  color: rgba(var(--text-light-rgb), 0.95);
  text-align: center;
  line-height: 1.85;
  margin-top: 0.5rem;
}

.hero-slogan .slogan-text {
  display: block;
}

.hero-slogan .slogan-line {
  display: block;
  white-space: nowrap;
}

.hero-slogan .slogan-line2 {
  font-size: 1.15em;
  margin-top: 0.15em;
}

.hero-slogan .slogan-char {
  display: inline-block;
  transition: transform 0.18s ease-out;
  will-change: transform;
}

.hero-content {
  position: relative;
  z-index: 1;
}

@keyframes caret-blink {
  0%,
  100% {
    border-color: rgba(var(--neon-primary-rgb), 0);
  }
  50% {
    border-color: rgba(var(--neon-primary-rgb), 0.95);
  }
}

.hero-subtitle {
  font-size: 1.05rem;
  max-width: 100%;
  margin: 0 0 0.5rem;
  color: rgba(var(--text-light-rgb), 0.9);
}

.hero-content--center .hero-subtitle {
  margin-bottom: 0.25rem;
}

.hero-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin: 0 0 1.8rem;
  line-height: 1.5;
}

.scroll-down-arrow {
  position: absolute;
  left: 50%;
  bottom: 2.5rem;
  transform: translateX(-50%);
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
  color: rgba(var(--text-light-rgb), 0.85);
  cursor: pointer;
  z-index: 3;
  transition: color var(--transition-fast), opacity var(--transition-normal);
}

.scroll-down-arrow:hover {
  color: rgba(var(--text-light-rgb), 1);
}

.scroll-down-arrow:hover .scroll-down-text {
  text-decoration: underline;
}

.scroll-down-text {
  font-size: 0.8rem;
  font-weight: 400;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-family: var(--font-en);
}

.scroll-down-icon {
  font-size: 1.2rem;
  animation: arrow-bounce 1.6s ease-in-out infinite;
}

.scroll-down-arrow.is-hidden {
  opacity: 0;
  pointer-events: none;
}

@keyframes arrow-bounce {
  0%,
  100% {
    transform: translate(-50%, 0);
  }
  50% {
    transform: translate(-50%, -10px);
  }
}

/* ========== 关于我（顶部渐变过渡条衔接 Hero）========== */

#about {
  background-color: var(--bg-color);
}

.section--with-hero-transition {
  position: relative;
}

.section--with-hero-transition::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2rem;
  background: linear-gradient(
    to bottom,
    rgba(var(--neon-primary-rgb), 0.12),
    var(--bg-color)
  );
  pointer-events: none;
}

.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 260px) minmax(0, 1.5fr);
  gap: 3rem;
  align-items: center;
}

.about-avatar {
  position: relative;
  perspective: 900px;
}

.about-avatar::before {
  content: "";
  position: absolute;
  inset: -10%;
  border-radius: 45% 55% 50% 50%;
  background: var(--neon-primary);
  opacity: 0.2;
  filter: blur(20px);
  z-index: 0;
}

.about-avatar img {
  position: relative;
  z-index: 1;
  width: 220px;
  height: 220px;
  object-fit: cover;
  border-radius: 999px;
  border: 4px solid rgba(var(--neon-primary-rgb), 0.4);
  box-shadow: var(--shadow-strong);
  transition: box-shadow var(--transition-normal), filter var(--transition-normal);
}

.about-avatar img:hover {
  box-shadow: 0 0 40px rgba(var(--neon-primary-rgb), 0.35);
  filter: saturate(1.04);
}

/* 报名照 / 个人照 双图层揭示特效 + 3D 卡片倾斜 */
.avatar-reveal {
  cursor: pointer;
}

.avatar-reveal-inner {
  position: relative;
  width: 220px;
  height: 220px;
  transform-style: preserve-3d;
  transform: rotateX(var(--avatar-rotate-x, 0deg)) rotateY(var(--avatar-rotate-y, 0deg)) scale(var(--avatar-scale, 1));
  transition: transform 0.2s ease-out, box-shadow 0.2s ease-out;
  will-change: transform;
}

.avatar-reveal:hover .avatar-reveal-inner {
  box-shadow: 0 0 40px rgba(var(--neon-primary-rgb), 0.25);
}

.avatar-reveal .avatar-layer {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 999px;
  border: 4px solid rgba(var(--neon-primary-rgb), 0.4);
  box-shadow: var(--shadow-strong);
  transition: box-shadow var(--transition-normal), filter var(--transition-normal), opacity 0.5s ease;
}

.avatar-reveal .avatar-back {
  z-index: 1;
}

.avatar-reveal .avatar-front {
  z-index: 2;
}

.avatar-reveal:not(.avatar-reveal--revealed) .avatar-front:hover,
.avatar-reveal.avatar-reveal--revealed .avatar-back:hover {
  box-shadow: 0 0 40px rgba(var(--neon-primary-rgb), 0.35);
  filter: saturate(1.04);
}

.avatar-reveal.avatar-reveal--revealed .avatar-front {
  opacity: 0;
  pointer-events: none;
}

/* ========== 教育背景时间线 ========== */

#education {
  background-color: var(--bg-color);
}

.education-with-avatar {
  display: grid;
  grid-template-columns: minmax(0, 260px) minmax(0, 1.5fr);
  gap: 3rem;
  align-items: center;
  margin-top: 1.5rem;
}

.education-with-avatar .timeline {
  position: relative;
  padding-left: 1.5rem;
  margin-top: 0;
}

.education-with-avatar .timeline::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1.2rem;
  bottom: 1.2rem;
  width: 3px;
  border-radius: 999px;
  background: linear-gradient(
    to bottom,
    rgba(var(--neon-primary-rgb), 0.05),
    rgba(var(--neon-primary-rgb), 0.8),
    rgba(var(--neon-primary-rgb), 0.05)
  );
  opacity: 0.9;
}

.education-with-avatar .timeline-item::before {
  display: none;
}

.timeline {
  position: relative;
  padding-left: 1.8rem;
  margin-top: 1.5rem;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 0.6rem;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(
    to bottom,
    transparent,
    rgba(var(--neon-primary-rgb), 0.5),
    rgba(var(--neon-primary-rgb), 0.2),
    transparent
  );
}

.timeline-item {
  position: relative;
  padding: 1.4rem 1.6rem 1.4rem 1.8rem;
  margin-bottom: 1.4rem;
  border-radius: var(--radius-md);
  background: var(--card-bg-dark);
  border: var(--border-subtle);
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(12px);
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -1.05rem;
  top: 1.4rem;
  width: 12px;
  height: 12px;
  border-radius: 999px;
  background: var(--neon-primary);
  box-shadow: 0 0 0 0 rgba(var(--neon-primary-rgb), 0.5);
  animation: pulse-dot 1.8s ease-out infinite;
}

@keyframes pulse-dot {
  0% {
    box-shadow: 0 0 0 0 rgba(var(--neon-primary-rgb), 0.5);
  }
  70% {
    box-shadow: 0 0 0 10px rgba(var(--neon-primary-rgb), 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(var(--neon-primary-rgb), 0);
  }
}

.timeline-item-title {
  font-size: 1.1rem;
  margin-bottom: 0.3rem;
  color: var(--text-primary);
}

.timeline-item-subtitle {
  font-size: 0.93rem;
  color: var(--text-secondary);
  margin-bottom: 0.45rem;
}

.timeline-item-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  margin-top: 0.4rem;
}

.timeline-item-time {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.timeline-name {
  font-size: 1.2rem;
  margin-bottom: 0.25rem;
  color: var(--text-primary);
}

.timeline-desc-label {
  color: var(--text-muted);
  font-weight: 500;
}

.timeline-desc--tagline {
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.timeline-divider {
  height: 1px;
  margin: 1rem 0 1.1rem;
  background: linear-gradient(
    to right,
    rgba(var(--card-bg-rgb), 0),
    rgba(var(--slate-rgb), 0.7),
    rgba(var(--card-bg-rgb), 0)
  );
}

.timeline-school {
  margin-top: 1.25rem;
  margin-bottom: 0.35rem;
  font-size: 1.1rem;
  color: var(--text-primary);
}

/* ========== 工作与实习经历 ========== */

#experience {
  background-color: var(--bg-color);
}

.experience-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.8rem;
}

.exp-card {
  position: relative;
  padding: 1.6rem 1.7rem;
  border-radius: var(--radius-lg);
  background: var(--card-bg-dark);
  border: var(--border-subtle);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
  transform-style: preserve-3d;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  backdrop-filter: blur(12px);
}

.exp-card::before {
  content: "";
  position: absolute;
  inset: -40%;
  background: radial-gradient(
    circle at 50% 50%,
    rgba(var(--neon-primary-rgb), 0.15),
    transparent 60%
  );
  opacity: 0;
  transition: opacity var(--transition-normal);
  z-index: -1;
}

.exp-card::after {
  content: "";
  position: absolute;
  inset: 1px;
  border-radius: calc(var(--radius-lg) - 1px);
  background: var(--card-bg-dark);
  z-index: -1;
}

.exp-card:hover {
  box-shadow: 0 0 30px rgba(var(--neon-primary-rgb), 0.15);
  transform: translateY(-4px);
}

.exp-card:hover::before,
.exp-card.active::before {
  opacity: 1;
}

.exp-header {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  margin-bottom: 0.7rem;
}

.exp-company {
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--text-primary);
}

.exp-role {
  font-size: 0.92rem;
  color: var(--text-secondary);
}

.exp-summary {
  font-size: 0.9rem;
  margin-top: 0.35rem;
  color: var(--text-secondary);
}

.exp-details {
  max-height: 0;
  overflow: hidden;
  margin-top: 0.5rem;
  border-top: 1px dashed var(--card-border-dark);
  padding-top: 0;
  transition: max-height 0.55s ease, padding-top 0.3s ease;
}

.exp-card.active .exp-details {
  max-height: 500px;
  padding-top: 0.75rem;
}

.exp-details ul {
  padding-left: 1.1rem;
}

.exp-details li {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 0.35rem;
}

/* ========== 项目经历 - 翻转卡片 ========== */

#projects {
  background-color: var(--bg-color);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.6rem;
}

.flip-card {
  perspective: 1000px;
}

.flip-card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform 0.6s ease;
}

.flip-front,
.flip-back {
  position: relative;
  width: 100%;
  height: 100%;
  min-height: 220px;
  padding: 1.6rem 1.5rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  backface-visibility: hidden;
}

.flip-front {
  background: var(--card-bg-dark);
  border: var(--border-subtle);
  color: var(--text-primary);
  backdrop-filter: blur(12px);
}

.flip-back {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--bg-dark), var(--bg-color));
  color: var(--text-primary);
  border: 1px solid rgba(var(--neon-primary-rgb), 0.25);
  transform: rotateY(180deg);
}

.flip-card:hover .flip-card-inner {
  transform: rotateY(180deg);
}

.project-title {
  font-size: 1.05rem;
  margin-bottom: 0.4rem;
  color: var(--text-primary);
}

.project-type {
  font-size: 0.86rem;
  color: var(--text-muted);
  margin-bottom: 0.6rem;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: 0.75rem;
}

/* ========== 技能与证书 ========== */

#skills {
  background-color: var(--bg-color);
}

.skills-content {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1.1fr);
  gap: 2rem;
  align-items: flex-start;
}

.skills-bars {
  padding: 1.4rem 1.6rem;
  border-radius: var(--radius-lg);
  background: var(--card-bg-dark);
  box-shadow: var(--shadow-soft);
  border: var(--border-subtle);
  backdrop-filter: blur(12px);
}

.skill-group-title {
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--text-muted);
  margin-bottom: 0.8rem;
}

.skill-item {
  margin-bottom: 1rem;
}

.skill-name {
  font-weight: 500;
  color: var(--text-primary);
}

.skill-percent {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.progress-bar {
  width: 100%;
  height: 8px;
  border-radius: 999px;
  background: rgba(var(--card-bg-rgb), 0.8);
  overflow: hidden;
  border: 1px solid var(--card-border-dark);
}

.progress-bar-fill {
  width: 0;
  height: 100%;
  border-radius: 999px;
  background: var(--neon-primary);
  box-shadow: 0 0 12px rgba(var(--neon-primary-rgb), 0.6);
  transition: width 1.4s ease-out;
}

.certificates-carousel {
  position: relative;
  padding: 1.4rem 1.4rem 2.3rem;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--bg-dark), var(--bg-color));
  color: var(--text-primary);
  border: 1px solid rgba(var(--neon-primary-rgb), 0.2);
  box-shadow: 0 0 30px rgba(var(--neon-primary-rgb), 0.1);
  overflow: hidden;
}

.carousel {
  overflow: hidden;
}

.carousel-track {
  display: flex;
  gap: 1.5rem;
  transition: transform 0.55s ease;
}

.cert-card {
  min-width: 100%;
  border-radius: var(--radius-md);
  overflow: hidden;
  background-color: rgba(var(--card-bg-rgb), 0.9);
  border: 1px solid var(--card-border-dark);
  box-shadow: var(--shadow-soft);
  cursor: pointer;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal),
    filter var(--transition-normal);
}

.cert-card img {
  width: 100%;
  height: auto;
  display: block;
}

.cert-card-caption {
  padding: 0.9rem 1.1rem 1rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
  border-top: 1px solid var(--card-border-dark);
}

.cert-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 0 25px rgba(var(--neon-primary-rgb), 0.2);
  filter: brightness(1.02);
}

.carousel-prev,
.carousel-next {
  width: 34px;
  height: 34px;
  border-radius: 999px;
  border: 1px solid rgba(var(--neon-primary-rgb), 0.5);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: var(--text-primary);
  background: var(--card-bg-dark);
  box-shadow: 0 0 16px rgba(var(--neon-primary-rgb), 0.2);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast),
    filter var(--transition-fast), opacity var(--transition-fast);
}

.carousel-prev:hover,
.carousel-next:hover {
  transform: translateY(-1px) scale(1.03);
  box-shadow: 0 0 24px rgba(var(--neon-primary-rgb), 0.4);
  filter: brightness(1.15);
}

.carousel-prev[disabled],
.carousel-next[disabled] {
  opacity: 0.4;
  cursor: default;
  box-shadow: none;
}

/* 灯箱 */

.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(var(--card-bg-rgb), 0.92);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
  z-index: 60;
}

.lightbox.active {
  opacity: 1;
  pointer-events: auto;
}

.lightbox-close {
  position: absolute;
  top: -2.5rem;
  right: 0;
  width: 32px;
  height: 32px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(var(--card-bg-rgb), 0.9);
  color: var(--text-primary);
  border: 1px solid rgba(var(--slate-rgb), 0.7);
  box-shadow: 0 10px 26px rgba(var(--card-bg-rgb), 0.9);
  cursor: pointer;
}

/* ========== 个人兴趣 ========== */

#interests {
  padding: 5rem 1.5rem 5.5rem;
  background: linear-gradient(180deg, var(--bg-color) 0%, var(--bg-dark) 50%, var(--bg-color) 100%);
  color: var(--text-primary);
  position: relative;
}

/* 与上方「技能与证书」分隔：顶部渐变条 + 留白 */
#interests::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4rem;
  background: linear-gradient(
    to bottom,
    var(--bg-color),
    rgba(var(--neon-primary-rgb), 0.06),
    var(--bg-color)
  );
  pointer-events: none;
}

#interests .section-container {
  padding-top: 1.5rem;
}

#interests .section-title {
  color: var(--text-primary);
  background: none;
}

#interests .section-title {
  color: var(--text-primary);
  background: none;
}

.games-showcase {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.8rem;
  margin-bottom: 2.5rem;
}

.game-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--card-bg-dark);
  border: 1px solid rgba(var(--neon-primary-rgb), 0.2);
  box-shadow: var(--shadow-soft);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal),
    filter var(--transition-normal);
  min-height: 300px;
}

.game-card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.game-card-body {
  padding: 1.1rem 1.3rem 1.2rem;
}

.game-card .game-info {
  padding: 1.1rem 1.3rem 1.2rem;
}

.game-info h3,
.game-card-title {
  font-size: 1.02rem;
  margin-bottom: 0.4rem;
  color: var(--text-primary);
}

.game-info p,
.game-card-desc {
  font-size: 0.9rem;
  color: rgba(var(--text-light-rgb), 0.9);
}

.game-card:hover {
  transform: translateY(-6px) scale(1.02);
  box-shadow: 0 0 30px rgba(var(--neon-primary-rgb), 0.2);
  filter: brightness(1.08);
}

.esports-card {
  display: flex;
  flex-direction: row;
  gap: 1.5rem;
  align-items: center;
  padding: 1.5rem;
}

.esports-photo {
  flex-shrink: 0;
  width: 200px;
  height: 200px;
}

.esports-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
  border: 3px solid rgba(var(--neon-primary-rgb), 0.4);
  box-shadow: var(--shadow-soft);
}

.esports-info {
  flex: 1;
  min-width: 0;
}

.esports-summary {
  font-weight: 500;
  color: var(--neon-primary);
  margin-bottom: 0.5rem;
}

.esports-info blockquote {
  margin: 0.75rem 0 0;
  padding-left: 1rem;
  border-left: 3px solid var(--neon-primary);
  font-style: italic;
  color: var(--text-secondary);
}

.esports cite {
  display: block;
  margin-top: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 1rem;
  margin-bottom: 2.2rem;
}

/* 饥荒截图：左侧一大图竖版，右侧三张（上二下一） */
.gallery-grid--featured {
  grid-template-columns: minmax(160px, 0.45fr) 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  row-gap: 2rem;
  column-gap: 2rem;
  gap: 0;
  height: 380px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 4rem;
}

.gallery-grid--featured .gallery-grid__hero {
  grid-column: 1;
  grid-row: 1 / -1;
  align-self: stretch;
  min-height: 0;
  border-radius: 1rem;
  overflow: hidden;
  background: var(--bg-color);
}

.gallery-grid--featured .gallery-grid__hero img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
}

.gallery-grid--featured > img:nth-child(2) {
  grid-column: 2;
  grid-row: 1;
  aspect-ratio: 4/3;
  object-fit: cover;
  object-position: center;
}

.gallery-grid--featured > img:nth-child(3) {
  grid-column: 3;
  grid-row: 1;
  aspect-ratio: 4/3;
  object-fit: cover;
  object-position: center;
}

.gallery-grid--featured > img:nth-child(4) {
  grid-column: 2 / -1;
  grid-row: 2;
}

.gallery-grid img,
.life-photos-grid img {
  width: 100%;
  border-radius: 1rem;
  object-fit: cover;
  cursor: pointer;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal),
    filter var(--transition-normal);
}

.gallery-grid img:hover,
.life-photos-grid img:hover {
  transform: translateY(-4px) scale(1.03);
  box-shadow: 0 0 30px rgba(var(--neon-primary-rgb), 0.35);
  filter: saturate(1.1);
}

.life-photos-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(175px, 250px));
  gap: 2rem;
  margin-top: 1.25rem;
  justify-content: center;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.life-photos-section {
  margin-top: calc(3.5rem + 5em);
}

/* ========== 页脚 ========== */

#footer {
  position: relative;
  padding: 3.5rem 1.5rem 2.5rem;
  background: radial-gradient(circle at top, var(--bg-color), var(--bg-color) 60%, var(--bg-color) 100%);
  color: var(--text-primary);
}

#footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60%;
  height: 2px;
  border-radius: 999px;
  background: var(--neon-primary);
  opacity: 0.7;
}

.footer-container {
  max-width: 1120px;
  margin: 0 auto;
  text-align: center;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 1.3rem;
}

.footer-btn {
  padding: 0.6rem 1.2rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(var(--neon-primary-rgb), 0.5);
  background: var(--card-bg-dark);
  color: var(--text-primary);
  font-size: 0.9rem;
  box-shadow: 0 0 18px rgba(var(--neon-primary-rgb), 0.2);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast),
    filter var(--transition-fast);
}

.footer-btn:hover {
  transform: translateY(-1px) scale(1.02);
  box-shadow: 0 0 24px rgba(var(--neon-primary-rgb), 0.4);
  filter: brightness(1.08);
}

.back-to-top {
  margin-top: 0.8rem;
  padding: 0.5rem 1.2rem;
  border-radius: var(--radius-pill);
  border: 1px dashed rgba(var(--neon-primary-rgb), 0.5);
  background-color: transparent;
  color: var(--text-primary);
  font-size: 0.86rem;
  opacity: 0;
  transform: translateY(6px);
  pointer-events: none;
  transition: opacity var(--transition-normal), transform var(--transition-normal);
}

.back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.footer-divider {
  width: 80%;
  margin: 1.5rem auto 0.8rem;
  height: 1px;
  background: linear-gradient(
    to right,
    rgba(var(--card-bg-rgb), 0),
    rgba(var(--slate-rgb), 0.7),
    rgba(var(--card-bg-rgb), 0)
  );
}

.copyright {
  font-size: 0.85rem;
  color: rgba(var(--slate-rgb), 0.9);
}

/* ========== 右下角回到首页 ========== */

.back-to-hero {
  position: fixed;
  right: 4rem;
  bottom: 5rem;
  z-index: 35;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1.35rem;
  font-size: 0.98rem;
  font-family: var(--font-en);
  letter-spacing: 0.06em;
  color: rgba(var(--text-light-rgb), 0.9);
  border: 2px solid rgba(var(--slate-rgb), 0.5);
  border-radius: 9999px;
  background: rgba(var(--card-bg-rgb), 0.85);
  backdrop-filter: blur(8px);
  text-decoration: none;
  transition: color var(--transition-fast), border-color var(--transition-fast),
    transform var(--transition-fast), box-shadow var(--transition-fast);
}

.back-to-hero:hover {
  color: var(--neon-primary);
  border-color: rgba(var(--neon-primary-rgb), 0.6);
  transform: translateY(-2px);
  box-shadow: 0 0 20px rgba(var(--neon-primary-rgb), 0.2);
}

/* ========== 响应式布局 ========== */

@media (max-width: 1023px) {
  .section {
    padding-inline: 1.25rem;
  }

  .hero-inner {
    padding: 0 1.25rem;
  }

  .hero-content--center {
    text-align: center;
  }

  .hero-meta {
    text-align: center;
  }

  .about-grid {
    grid-template-columns: minmax(0, 1fr);
    text-align: center;
  }

  .education-with-avatar {
    grid-template-columns: minmax(0, 1fr);
    text-align: center;
  }

  .education-with-avatar .about-avatar {
    justify-self: center;
  }

  .skills-content {
    grid-template-columns: minmax(0, 1fr);
  }

  .timeline {
    padding-left: 1.2rem;
  }

  .timeline::before {
    left: 0.4rem;
  }

  .timeline-item {
    padding-left: 1.4rem;
  }

  .timeline-item::before {
    left: -1.1rem;
  }
}

@media (max-width: 767px) {
  .nav-container {
    padding-inline: 1.1rem;
    padding-left: 0.6rem;
  }

  .nav-logo {
    font-size: 2.2rem;
  }

  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    padding: 0.75rem 1.4rem 1.3rem;
    background: rgba(var(--card-bg-rgb), 0.98);
    flex-direction: column;
    gap: 0.75rem;
    transform-origin: top;
    transform: scaleY(0.8);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.22s ease, transform 0.22s ease;
  }

  .nav-links.is-open {
    opacity: 1;
    pointer-events: auto;
    transform: scaleY(1);
  }

  .nav-toggle {
    display: inline-flex;
  }

  #hero {
    padding-top: 5.8rem;
  }

  .hero-inner {
    padding: 0 0.75rem;
  }

  .hero-card {
    padding: 1.5rem 1.25rem 1.75rem;
  }

  .hero-title--outline {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 0.96rem;
  }

  .hero-desc {
    font-size: 0.9rem;
  }

  .back-to-hero {
    right: 2.5rem;
    bottom: 4.5rem;
    font-size: 0.9rem;
    padding: 0.55rem 1.1rem;
  }

  .section {
    padding: 3.5rem 1.1rem;
  }

  .projects-grid,
  .experience-cards,
  .games-showcase,
  .gallery-grid,
  .life-photos-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .gallery-grid--featured {
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: auto;
    height: auto;
  }

  .gallery-grid--featured .gallery-grid__hero {
    grid-row: auto;
    min-height: 220px;
  }

  .gallery-grid--featured > img:nth-child(2),
  .gallery-grid--featured > img:nth-child(3),
  .gallery-grid--featured > img:nth-child(4) {
    grid-column: 1;
    grid-row: auto;
  }

  .game-card img {
    height: 160px;
  }

  .esports-card {
    flex-direction: column;
    text-align: center;
  }

  .esports-card .esports-photo img {
    height: 100%;
  }

  .back-to-top {
    font-size: 0.8rem;
  }

  /* 移动端：稍微弱化 3D 和复杂动画以保证性能 */
  .exp-card,
  .flip-card-inner {
    transition-duration: 0.35s;
  }
}