* { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --bg: #07080f;
  --text: #e5e7eb;
  --muted: #94a3b8;
  --indigo: #6366f1;
  --purple: #a855f7;
  --pink: #ec4899;
  --cyan: #22d3ee;
  --glass: rgba(255,255,255,.045);
  --line: rgba(255,255,255,.09);
}
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "PingFang SC", sans-serif;
  background: var(--bg); color: var(--text);
  overflow-x: hidden; line-height: 1.6;
}
::selection { background: rgba(168,85,247,.4); }

/* ---------- 背景 ---------- */
#bg { position: fixed; inset: 0; z-index: 0; }
.aurora {
  position: fixed; z-index: 0; border-radius: 50%;
  filter: blur(90px); opacity: .35; pointer-events: none;
  animation: drift 22s ease-in-out infinite alternate;
}
.a1 { width: 44vmax; height: 44vmax; left: -12vmax; top: -14vmax;
  background: radial-gradient(circle, #4338ca 0%, transparent 65%); }
.a2 { width: 38vmax; height: 38vmax; right: -10vmax; top: 18vh;
  background: radial-gradient(circle, #7e22ce 0%, transparent 65%);
  animation-delay: -7s; }
.a3 { width: 34vmax; height: 34vmax; left: 22vw; bottom: -16vmax;
  background: radial-gradient(circle, #be185d 0%, transparent 65%);
  animation-delay: -14s; }
@keyframes drift {
  from { transform: translate(0,0) scale(1); }
  to   { transform: translate(6vw, 5vh) scale(1.15); }
}

/* ---------- 加载屏 ---------- */
#loader {
  position: fixed; inset: 0; z-index: 100; background: var(--bg);
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 26px;
  transition: opacity .6s ease, visibility .6s;
}
#loader.done { opacity: 0; visibility: hidden; }
.loader-logo {
  font-size: 42px; font-weight: 800; letter-spacing: .35em; padding-left: .35em;
  animation: pulse 1.1s ease-in-out infinite;
  background: linear-gradient(90deg, var(--cyan), var(--indigo), var(--pink));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
@keyframes pulse { 50% { opacity: .45; } }
.loader-bar { width: 200px; height: 3px; background: rgba(255,255,255,.08); border-radius: 99px; overflow: hidden; }
.loader-bar i {
  display: block; height: 100%; width: 0; border-radius: 99px;
  background: linear-gradient(90deg, var(--cyan), var(--indigo), var(--pink));
  transition: width .25s ease;
}

/* ---------- 自定义光标（仅桌面装饰，不替代原生光标） ---------- */
#cursor-dot, #cursor-ring {
  position: fixed; z-index: 99; pointer-events: none; border-radius: 50%;
  transform: translate(-50%,-50%); display: none;
}
#cursor-dot { width: 7px; height: 7px; background: var(--cyan);
  box-shadow: 0 0 12px var(--cyan); }
#cursor-ring {
  width: 34px; height: 34px; border: 1.5px solid rgba(34,211,238,.55);
  transition: width .25s, height .25s, border-color .25s;
}
body.has-cursor #cursor-dot, body.has-cursor #cursor-ring { display: block; }
body.cursor-hover #cursor-ring { width: 52px; height: 52px; border-color: var(--pink); }

/* ---------- 导航 ---------- */
#nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  transition: background .35s, backdrop-filter .35s, box-shadow .35s;
}
#nav.scrolled {
  background: rgba(7,8,15,.72); backdrop-filter: blur(14px);
  box-shadow: 0 1px 0 rgba(255,255,255,.06);
}
.nav-inner {
  max-width: 1060px; margin: 0 auto; padding: 16px 20px;
  display: flex; align-items: center; justify-content: space-between;
}
.brand {
  color: var(--text); text-decoration: none; font-weight: 800; font-size: 20px; letter-spacing: .12em;
}
.brand span { color: var(--pink); }
.nav-links { display: flex; gap: 6px; }
.nav-links a {
  color: var(--muted); text-decoration: none; font-size: 14px;
  padding: 7px 14px; border-radius: 999px; transition: color .25s, background .25s;
}
.nav-links a:hover { color: var(--text); }
.nav-links a.active {
  color: var(--text); background: rgba(255,255,255,.08);
}
#menu-btn {
  display: none; background: none; border: 1px solid var(--line); color: var(--text);
  font-size: 17px; border-radius: 10px; padding: 4px 12px; cursor: pointer;
}

/* ---------- Hero ---------- */
#home {
  position: relative; z-index: 1; min-height: 100svh;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  text-align: center; padding: 110px 20px 60px;
}
.hero-title { font-size: clamp(30px, 6vw, 54px); font-weight: 800; margin-top: 30px; }
.grad {
  background: linear-gradient(92deg, var(--cyan) 0%, var(--indigo) 38%, var(--purple) 68%, var(--pink) 100%);
  background-size: 220% auto;
  -webkit-background-clip: text; background-clip: text; color: transparent;
  animation: shine 5s linear infinite;
}
@keyframes shine { to { background-position: 220% center; } }
.typing-line {
  margin-top: 18px; font-size: clamp(15px, 2.4vw, 19px); color: #c7d2fe; min-height: 1.9em;
}
.caret {
  display: inline-block; width: 2px; height: 1.15em; margin-left: 3px; vertical-align: -0.2em;
  background: var(--cyan); animation: blink .9s step-end infinite;
}
@keyframes blink { 50% { opacity: 0; } }
.hero-sub { margin-top: 14px; color: var(--muted); max-width: 520px; }
.hero-cta { margin-top: 34px; display: flex; gap: 16px; flex-wrap: wrap; justify-content: center; }
.btn {
  text-decoration: none; font-size: 15px; padding: 13px 28px; border-radius: 999px;
  transition: transform .25s, box-shadow .25s, background .25s;
}
.btn:hover { transform: translateY(-3px); }
.btn-primary {
  color: #fff;
  background: linear-gradient(92deg, var(--indigo), var(--purple), var(--pink));
  box-shadow: 0 8px 30px rgba(139,92,246,.35);
}
.btn-primary:hover { box-shadow: 0 12px 40px rgba(236,72,153,.45); }
.btn-ghost {
  color: var(--text); border: 1px solid var(--line); background: var(--glass);
}
.btn-ghost:hover { border-color: var(--cyan); }

#avatar {
  width: 108px; height: 108px; border-radius: 50%; cursor: pointer; user-select: none;
  display: flex; align-items: center; justify-content: center;
  background:
    linear-gradient(var(--bg), var(--bg)) padding-box,
    conic-gradient(var(--cyan), var(--indigo), var(--purple), var(--pink), var(--cyan)) border-box;
  border: 3px solid transparent;
  box-shadow: 0 0 46px rgba(124,58,237,.45);
  animation: spin-border 6s linear infinite;
}
#avatar span {
  font-size: 44px; font-weight: 800;
  background: linear-gradient(135deg, var(--cyan), var(--pink));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
@keyframes spin-border { to { rotate: 360deg; } }
#avatar.pop { animation: pop .35s ease, spin-border 6s linear infinite; }
@keyframes pop { 50% { transform: scale(.88); } }

.scroll-hint {
  position: absolute; bottom: 26px; width: 24px; height: 40px;
  border: 2px solid rgba(255,255,255,.25); border-radius: 14px;
}
.scroll-hint span {
  position: absolute; left: 50%; top: 7px; width: 4px; height: 9px; margin-left: -2px;
  border-radius: 4px; background: var(--cyan);
  animation: wheel 1.6s ease-in-out infinite;
}
@keyframes wheel { 70% { transform: translateY(14px); opacity: 0; } 100% { opacity: 0; } }

/* ---------- 区块通用 ---------- */
main { position: relative; z-index: 1; }
section { max-width: 1060px; margin: 0 auto; padding: 90px 20px 30px; }
.sec-title { text-align: center; font-size: clamp(24px, 4vw, 34px); font-weight: 800; }
.sec-sub { text-align: center; color: var(--muted); margin-top: 10px; }
.sec-title + .sec-sub::after {
  content: ""; display: block; width: 64px; height: 3px; border-radius: 99px;
  margin: 18px auto 0;
  background: linear-gradient(90deg, var(--cyan), var(--pink));
}

/* ---------- 小站卡片 ---------- */
.cards {
  margin-top: 48px;
  display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 22px;
  perspective: 900px;
}
.card {
  position: relative; display: flex; flex-direction: column; gap: 12px;
  padding: 30px 26px; border-radius: 20px; text-decoration: none; color: var(--text);
  background: var(--glass); border: 1px solid var(--line);
  backdrop-filter: blur(10px);
  transform-style: preserve-3d;
  transform: perspective(700px) rotateX(var(--rx,0deg)) rotateY(var(--ry,0deg));
  transition: transform .18s ease-out, border-color .3s, box-shadow .3s;
  overflow: hidden;
}
.card::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(420px circle at var(--mx,50%) var(--my,50%), rgba(139,92,246,.16), transparent 42%);
  opacity: 0; transition: opacity .3s; pointer-events: none;
}
.card:hover { border-color: rgba(167,139,250,.6); box-shadow: 0 18px 46px rgba(0,0,0,.45); }
.card:hover::before { opacity: 1; }
.card-icon {
  font-size: 40px; line-height: 1;
  transform: translateZ(36px);
}
.card h3 { font-size: 19px; transform: translateZ(26px); }
.card p { color: var(--muted); font-size: 14px; flex: 1; transform: translateZ(18px); }
.go {
  font-size: 13px; color: #c4b5fd; transform: translateZ(18px);
  transition: letter-spacing .25s, color .25s;
}
.card:hover .go { letter-spacing: .18em; color: var(--cyan); }

/* ---------- 统计带 ---------- */
.stats-band {
  display: flex; justify-content: center; gap: 14px; flex-wrap: wrap;
  padding: 26px 20px !important;
}
.stat {
  min-width: 150px; text-align: center; padding: 22px 18px;
  background: var(--glass); border: 1px solid var(--line); border-radius: 18px;
  backdrop-filter: blur(8px);
}
.stat b {
  display: block; font-size: 34px; font-weight: 800;
  background: linear-gradient(180deg, var(--cyan), var(--purple));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.stat b::after { content: "+"; font-size: 20px; vertical-align: 6px; }
.stat:nth-child(2) b::after, .stat:nth-child(3) b::after { content: ""; }
.stat span { color: var(--muted); font-size: 13px; }

/* ---------- 时间线 ---------- */
.timeline { margin: 52px auto 0; max-width: 560px; position: relative; padding-left: 34px; }
.timeline::before {
  content: ""; position: absolute; left: 8px; top: 6px; bottom: 6px; width: 2px;
  background: linear-gradient(180deg, var(--cyan), var(--purple), var(--pink)); border-radius: 2px;
}
.t-item { position: relative; padding-bottom: 34px; }
.t-item:last-child { padding-bottom: 0; }
.t-item i {
  position: absolute; left: -33px; top: 5px; width: 12px; height: 12px; border-radius: 50%;
  background: var(--bg); border: 3px solid var(--purple);
  box-shadow: 0 0 0 0 rgba(168,85,247,.5); animation: ring 2.4s infinite;
}
@keyframes ring {
  70% { box-shadow: 0 0 0 11px rgba(168,85,247,0); }
  100% { box-shadow: 0 0 0 0 rgba(168,85,247,0); }
}
.t-item time { font-size: 12px; color: var(--cyan); letter-spacing: .1em; }
.t-item h4 { font-size: 17px; margin-top: 4px; }
.t-item p { color: var(--muted); font-size: 14px; margin-top: 4px; }

/* ---------- 技能标签 ---------- */
.tags {
  margin-top: 48px; display: flex; flex-wrap: wrap; gap: 14px; justify-content: center;
  max-width: 720px; margin-left: auto; margin-right: auto;
}
.tags span {
  padding: 10px 20px; border-radius: 999px; font-size: 14.5px;
  background: var(--glass); border: 1px solid var(--line);
  animation: floaty 4s ease-in-out infinite; animation-delay: var(--d, 0s);
  transition: border-color .3s, transform .3s;
}
.tags span:hover { border-color: var(--pink); transform: translateY(-4px) scale(1.05); }
@keyframes floaty { 50% { transform: translateY(-7px); } }

/* ---------- 页脚 ---------- */
footer {
  position: relative; z-index: 1; margin-top: 60px; padding: 80px 20px 46px;
  text-align: center; border-top: 1px solid rgba(255,255,255,.05);
}
.socials { margin-top: 34px; display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.socials a {
  text-decoration: none; color: var(--text); font-size: 14.5px;
  padding: 12px 26px; border-radius: 999px;
  background: var(--glass); border: 1px solid var(--line);
  transition: transform .25s, border-color .25s, box-shadow .25s;
}
.socials a:hover {
  transform: translateY(-4px); border-color: var(--cyan);
  box-shadow: 0 10px 28px rgba(34,211,238,.18);
}
.copy { margin-top: 44px; color: #64748b; font-size: 13px; }

/* ---------- 回到顶部 / 礼花 ---------- */
#to-top {
  position: fixed; right: 22px; bottom: 24px; z-index: 60;
  width: 46px; height: 46px; border-radius: 14px; cursor: pointer;
  background: var(--glass); border: 1px solid var(--line); color: var(--text);
  font-size: 19px; backdrop-filter: blur(8px);
  opacity: 0; visibility: hidden; transform: translateY(14px);
  transition: all .3s;
}
#to-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
#to-top:hover { border-color: var(--pink); }
#confetti { position: fixed; inset: 0; z-index: 98; pointer-events: none; }

/* ---------- 滚动入场 ---------- */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .75s cubic-bezier(.2,.65,.3,1), transform .75s cubic-bezier(.2,.65,.3,1); transition-delay: var(--rd, 0s); }
.reveal.in { opacity: 1; transform: translateY(0); }

/* ---------- 移动端 ---------- */
@media (max-width: 720px) {
  #menu-btn { display: block; }
  .nav-links {
    position: absolute; top: 100%; right: 14px; flex-direction: column; gap: 2px;
    background: rgba(13,15,26,.96); border: 1px solid var(--line); border-radius: 16px;
    padding: 10px; min-width: 150px; display: none;
    box-shadow: 0 18px 40px rgba(0,0,0,.5);
  }
  .nav-links.open { display: flex; }
  section { padding-top: 70px; }
}
@media (pointer: coarse) {
  body.has-cursor #cursor-dot, body.has-cursor #cursor-ring { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
}