/* =========================================================
   个人网站模板 · 样式表
   主题色集中在 :root，改这里就能换肤。
   ========================================================= */
:root {
  --bg: #07070d;
  --bg-soft: #0e0e1a;
  --text: #eef0ff;
  --muted: #9aa0c0;
  --card: rgba(255, 255, 255, 0.04);
  --card-border: rgba(255, 255, 255, 0.10);
  --accent-1: #22d3ee;  /* 青 */
  --accent-2: #a855f7;  /* 紫 */
  --accent-3: #ec4899;  /* 粉 */
  --grad: linear-gradient(120deg, var(--accent-1), var(--accent-2), var(--accent-3));
  --radius: 18px;
  --maxw: 1100px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont,
    "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
}

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

/* ---------- 背景层 ---------- */
.bg-layer {
  position: fixed;
  inset: 0;
  z-index: -2;
  overflow: hidden;
  background: radial-gradient(120% 120% at 50% 0%, #101026 0%, var(--bg) 60%);
}
.orb {
  position: absolute;
  width: 46vw;
  height: 46vw;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.45;
  animation: float 18s ease-in-out infinite;
}
.orb-1 { background: var(--accent-1); top: -10%; left: -8%; }
.orb-2 { background: var(--accent-2); bottom: -15%; right: -10%; animation-delay: -6s; }
.orb-3 { background: var(--accent-3); top: 35%; left: 55%; animation-delay: -12s; opacity: 0.3; }
@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(6%, 8%) scale(1.1); }
  66% { transform: translate(-5%, -6%) scale(0.95); }
}
.grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(120% 80% at 50% 0%, #000 30%, transparent 80%);
}

/* 鼠标跟随光晕 */
.cursor-glow {
  position: fixed;
  width: 380px;
  height: 380px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(168, 85, 247, 0.18), transparent 60%);
  transform: translate(-50%, -50%);
  pointer-events: none;
  z-index: -1;
  transition: opacity 0.3s;
  opacity: 0;
}

/* ---------- 导航 ---------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px clamp(20px, 5vw, 60px);
  backdrop-filter: blur(12px);
  background: rgba(7, 7, 13, 0.5);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s, background 0.3s;
}
.nav.scrolled { border-color: var(--card-border); background: rgba(7, 7, 13, 0.8); }
.brand {
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: 0.5px;
}
.brand-dot { color: var(--accent-1); }
.nav-links { display: flex; gap: 28px; }
.nav-links a {
  color: var(--muted);
  font-size: 0.95rem;
  position: relative;
  transition: color 0.25s;
}
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0; bottom: -6px;
  width: 0; height: 2px;
  background: var(--grad);
  transition: width 0.3s;
}
.nav-links a:hover { color: var(--text); }
.nav-links a:hover::after { width: 100%; }
.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: 0; cursor: pointer; }
.nav-toggle span { width: 26px; height: 2px; background: var(--text); transition: 0.3s; }

/* ---------- 通用按钮 ---------- */
.btn {
  display: inline-block;
  padding: 12px 26px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.2s, box-shadow 0.3s, background 0.3s;
}
.btn-primary {
  background: var(--grad);
  color: #08080f;
  box-shadow: 0 8px 30px rgba(168, 85, 247, 0.35);
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 12px 40px rgba(168, 85, 247, 0.5); }
.btn-ghost { border-color: var(--card-border); color: var(--text); }
.btn-ghost:hover { border-color: var(--accent-1); color: var(--accent-1); }

/* ---------- Hero ---------- */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 0 20px;
  position: relative;
}
.hero-inner { max-width: 780px; }
.hero-kicker {
  color: var(--accent-1);
  letter-spacing: 4px;
  text-transform: uppercase;
  font-size: 0.85rem;
  margin-bottom: 12px;
}
.hero-name {
  font-size: clamp(2.8rem, 9vw, 6rem);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -2px;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  background-size: 200% auto;
  animation: shine 6s linear infinite;
}
@keyframes shine { to { background-position: 200% center; } }
.hero-role {
  font-size: clamp(1.1rem, 3.5vw, 1.8rem);
  margin: 18px 0;
  color: var(--text);
  min-height: 1.6em;
}
.caret { color: var(--accent-1); animation: blink 1s step-end infinite; }
@keyframes blink { 50% { opacity: 0; } }
.hero-desc { color: var(--muted); max-width: 560px; margin: 0 auto 30px; }
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

.scroll-hint {
  position: absolute;
  bottom: 32px;
  width: 26px; height: 42px;
  border: 2px solid var(--card-border);
  border-radius: 14px;
  display: flex;
  justify-content: center;
}
.scroll-hint span {
  width: 4px; height: 8px;
  background: var(--accent-1);
  border-radius: 2px;
  margin-top: 7px;
  animation: scroll 1.6s ease-in-out infinite;
}
@keyframes scroll { 0%,100% { transform: translateY(0); opacity: 1; } 60% { transform: translateY(14px); opacity: 0.2; } }

/* ---------- 区块通用 ---------- */
.section { max-width: var(--maxw); margin: 0 auto; padding: clamp(70px, 12vw, 130px) clamp(20px, 5vw, 40px); }
.section-head { display: flex; align-items: baseline; gap: 16px; margin-bottom: 48px; }
.section-index {
  font-size: 0.9rem;
  color: var(--accent-2);
  font-weight: 700;
  letter-spacing: 2px;
}
.section-title {
  font-size: clamp(1.8rem, 5vw, 2.8rem);
  font-weight: 800;
}

/* ---------- 关于 ---------- */
.about-grid { display: grid; grid-template-columns: 280px 1fr; gap: 48px; align-items: center; }
.avatar-placeholder, .project-thumb {
  width: 100%;
  aspect-ratio: 1 / 1;
  border-radius: var(--radius);
  background: var(--card);
  border: 1px dashed var(--card-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  text-align: center;
  font-size: 0.9rem;
}
.about-text p { color: var(--muted); margin-bottom: 16px; }
.about-tags { list-style: none; display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.about-tags li {
  padding: 6px 14px;
  border: 1px solid var(--card-border);
  border-radius: 999px;
  font-size: 0.85rem;
  color: var(--text);
}

/* ---------- 技能 ---------- */
.skills { display: grid; gap: 22px; }
.skill-top { display: flex; justify-content: space-between; margin-bottom: 8px; font-size: 0.95rem; }
.skill-val { color: var(--accent-1); }
.skill-bar {
  height: 10px;
  background: var(--card);
  border-radius: 999px;
  overflow: hidden;
}
.skill-bar i {
  display: block;
  height: 100%;
  width: 0;
  border-radius: 999px;
  background: var(--grad);
  transition: width 1.4s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.tool-chips { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.tool-chips span {
  padding: 8px 16px;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  font-size: 0.85rem;
  transition: transform 0.2s, border-color 0.2s;
}
.tool-chips span:hover { transform: translateY(-3px); border-color: var(--accent-2); }

/* ---------- 项目 ---------- */
.projects { display: grid; grid-template-columns: repeat(2, 1fr); gap: 26px; }
.project-card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  overflow: hidden;
  transform-style: preserve-3d;
  transition: transform 0.15s ease, box-shadow 0.3s, border-color 0.3s;
  will-change: transform;
}
.project-card:hover { border-color: transparent; box-shadow: 0 20px 50px rgba(34, 211, 238, 0.18); }
.project-thumb { aspect-ratio: 16 / 9; border-radius: 0; border-width: 0 0 1px 0; }
.project-body { padding: 22px; }
.project-body h3 { font-size: 1.25rem; margin-bottom: 8px; }
.project-body p { color: var(--muted); font-size: 0.92rem; }
.project-meta { display: flex; align-items: center; justify-content: space-between; margin-top: 16px; }
.tag {
  font-size: 0.78rem;
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(168, 85, 247, 0.15);
  color: var(--accent-2);
}
.project-link { color: var(--accent-1); font-size: 0.88rem; transition: letter-spacing 0.2s; }
.project-link:hover { letter-spacing: 1px; }

/* ---------- 博客 ---------- */
.blog-note { color: var(--muted); margin-bottom: 30px; }
.posts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.post-card {
  padding: 24px;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  transition: transform 0.25s, border-color 0.25s, background 0.25s;
}
.post-card:hover { transform: translateY(-6px); border-color: var(--accent-1); background: rgba(34, 211, 238, 0.05); }
.post-date { font-size: 0.78rem; color: var(--accent-2); }
.post-card h3 { font-size: 1.1rem; margin: 10px 0; }
.post-card p { color: var(--muted); font-size: 0.88rem; }
.post-more { display: inline-block; margin-top: 14px; color: var(--accent-1); font-size: 0.85rem; }

/* ---------- 联系 ---------- */
.contact-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.contact-info p { color: var(--muted); margin-bottom: 20px; }
.contact-list { list-style: none; display: grid; gap: 14px; }
.contact-list li { display: flex; gap: 14px; align-items: center; }
.contact-list span { color: var(--muted); width: 64px; font-size: 0.85rem; }
.contact-list a, .contact-list b { color: var(--text); }
.socials { display: flex; gap: 14px; margin-top: 26px; }
.socials a {
  width: 44px; height: 44px;
  display: grid; place-items: center;
  border: 1px solid var(--card-border);
  border-radius: 12px;
  color: var(--muted);
  transition: 0.25s;
}
.socials a:hover { color: var(--text); border-color: var(--accent-2); transform: translateY(-3px); }

.contact-form { display: grid; gap: 14px; }
.contact-form input, .contact-form textarea {
  width: 100%;
  padding: 14px 16px;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  color: var(--text);
  font-size: 0.95rem;
  font-family: inherit;
  resize: vertical;
}
.contact-form input:focus, .contact-form textarea:focus {
  outline: none;
  border-color: var(--accent-1);
}

/* ---------- 页脚 ---------- */
.footer {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 40px clamp(20px, 5vw, 40px);
  border-top: 1px solid var(--card-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  color: var(--muted);
  font-size: 0.88rem;
}
.back-top { color: var(--accent-1); }

/* ---------- 滚动揭示动画 ---------- */
.reveal { opacity: 0; transform: translateY(36px); transition: opacity 0.8s ease, transform 0.8s ease; }
.reveal.visible { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 860px) {
  .about-grid { grid-template-columns: 1fr; gap: 28px; }
  .avatar-placeholder { max-width: 240px; }
  .projects { grid-template-columns: 1fr; }
  .posts { grid-template-columns: 1fr; }
  .contact-wrap { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .nav-links {
    position: fixed;
    top: 64px; right: 0;
    flex-direction: column;
    gap: 0;
    width: 220px;
    padding: 12px 0;
    background: rgba(10, 10, 22, 0.96);
    border: 1px solid var(--card-border);
    border-radius: 0 0 0 16px;
    transform: translateX(120%);
    transition: transform 0.3s;
  }
  .nav-links.open { transform: translateX(0); }
  .nav-links a { padding: 14px 24px; }
  .nav-links a::after { display: none; }
  .nav-toggle { display: flex; }
  .hero-name { letter-spacing: -1px; }
}

/* 尊重减少动画偏好 */
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}