:root{
  --bg:#0a0a18;
  --bg2:#0d0d20;
  --ink:#eef0ff;
  --muted:#9aa0c4;
  --violet:#8b7bff;
  --blue:#5ad1ff;
  --pink:#ff8fd0;
  --glass:rgba(255,255,255,.05);
  --line:rgba(255,255,255,.1);
  --maxw:1140px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:'Inter','Segoe UI',system-ui,-apple-system,sans-serif;
  background:var(--bg);color:var(--ink);overflow-x:hidden;line-height:1.65;
  -webkit-font-smoothing:antialiased}
a{color:inherit}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 28px}

/* ===== 极光背景 ===== */
.aurora{position:fixed;inset:0;z-index:0;pointer-events:none;overflow:hidden;background:
  radial-gradient(120% 80% at 50% -10%,#141430 0%,var(--bg) 55%)}
.blob{position:absolute;border-radius:50%;filter:blur(90px);opacity:.55;
  mix-blend-mode:screen;animation:float 18s ease-in-out infinite;will-change:transform}
.b1{width:540px;height:540px;background:radial-gradient(circle,#5ad1ff,transparent 70%);top:-140px;left:-90px}
.b2{width:620px;height:620px;background:radial-gradient(circle,#8b7bff,transparent 70%);bottom:-180px;right:-110px;animation-delay:-6s}
.b3{width:440px;height:440px;background:radial-gradient(circle,#ff8fd0,transparent 70%);top:42%;left:54%;animation-delay:-11s;opacity:.4}
@keyframes float{0%,100%{transform:translate(0,0) scale(1)}33%{transform:translate(44px,-34px) scale(1.1)}66%{transform:translate(-32px,32px) scale(.95)}}
.grain{position:absolute;inset:0;opacity:.04;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E")}

/* ===== 进度条 ===== */
.progress{position:fixed;top:0;left:0;height:3px;width:0;z-index:60;
  background:linear-gradient(90deg,var(--blue),var(--violet),var(--pink));box-shadow:0 0 12px var(--blue)}

/* ===== 导航 ===== */
nav{position:fixed;top:0;left:0;right:0;z-index:50;transition:.3s}
nav.scrolled{backdrop-filter:blur(16px);background:rgba(10,10,24,.6);border-bottom:1px solid var(--line)}
.nav-in{max-width:var(--maxw);margin:0 auto;padding:20px 28px;display:flex;align-items:center;justify-content:space-between}
.logo{font-family:'Space Grotesk',sans-serif;font-weight:700;font-size:20px;letter-spacing:.5px;text-decoration:none}
.logo b{background:linear-gradient(90deg,var(--blue),var(--pink));-webkit-background-clip:text;background-clip:text;color:transparent}
.nav-links{display:flex;gap:32px;font-size:14px;color:var(--muted)}
.nav-links a{text-decoration:none;transition:.25s}
.nav-links a:hover,.nav-links a.active{color:var(--ink)}
.btn{display:inline-block;padding:11px 24px;border-radius:40px;font-size:14px;text-decoration:none;color:#0a0a18;font-weight:600;
  background:linear-gradient(90deg,var(--blue),var(--violet));transition:.3s;box-shadow:0 8px 26px rgba(91,209,255,.28);border:none;cursor:pointer;font-family:inherit}
.btn:hover{transform:translateY(-2px);box-shadow:0 12px 34px rgba(139,123,255,.45)}
.btn-ghost{background:transparent;color:var(--ink);border:1px solid var(--line);box-shadow:none}
.btn-ghost:hover{border-color:var(--blue)}
.menu-toggle{display:none;background:none;border:none;color:var(--ink);font-size:22px;cursor:pointer}

/* 移动端菜单 */
.mobile-menu{position:fixed;top:64px;left:0;right:0;z-index:49;display:none;flex-direction:column;
  background:rgba(10,10,24,.96);backdrop-filter:blur(16px);border-bottom:1px solid var(--line)}
.mobile-menu.open{display:flex}
.mobile-menu a{padding:16px 28px;text-decoration:none;color:var(--muted);border-top:1px solid var(--line);font-size:15px}
.mobile-menu a:hover{color:var(--ink)}

/* ===== 首屏 ===== */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;padding:120px 0 60px}
.hero .wrap{position:relative;z-index:3}
.tag{display:inline-block;font-size:12px;letter-spacing:3px;color:var(--blue);border:1px solid var(--line);
  padding:8px 16px;border-radius:30px;background:var(--glass);margin-bottom:28px;text-transform:uppercase;font-family:'Space Grotesk',monospace}
h1{font-family:'Space Grotesk',sans-serif;font-size:clamp(46px,9vw,108px);line-height:1.02;font-weight:700;letter-spacing:-2px;margin-bottom:26px}
h1 .grad{background:linear-gradient(110deg,var(--blue),var(--violet) 55%,var(--pink));-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{max-width:560px;color:var(--muted);font-size:18px;margin-bottom:38px}
.lead b{color:var(--ink);font-weight:600}
.cta{display:flex;gap:16px;flex-wrap:wrap}

.orbit{position:absolute;right:-40px;top:50%;transform:translateY(-50%);width:360px;height:360px;pointer-events:none;opacity:.8;z-index:1}
.ring{position:absolute;inset:0;border:1px solid var(--line);border-radius:50%}
.ring.r2{inset:36px;border-color:rgba(139,123,255,.18)}
.ring.r3{inset:74px;border-color:rgba(255,143,208,.18)}
.ring.r1{animation:spin 28s linear infinite}
.ring.r3{animation:spin 20s linear infinite reverse}
.sphere{position:absolute;top:-7px;left:50%;width:15px;height:15px;border-radius:50%;background:var(--blue);box-shadow:0 0 22px var(--blue);transform:translateX(-50%)}
.sphere.s2{background:var(--pink);box-shadow:0 0 22px var(--pink);top:auto;bottom:-7px}
@keyframes spin{to{transform:rotate(360deg)}}

.scroll-hint{position:absolute;bottom:34px;left:28px;display:flex;align-items:center;gap:10px;
  font-family:'Space Grotesk',monospace;font-size:11px;letter-spacing:3px;color:var(--muted);z-index:3}
.scroll-hint span{width:1px;height:36px;background:linear-gradient(var(--blue),transparent);animation:drop 1.8s ease-in-out infinite}
@keyframes drop{0%{transform:scaleY(0);transform-origin:top}50%{transform:scaleY(1)}100%{transform:scaleY(0);transform-origin:bottom}}

/* ===== 区块通用 ===== */
section{padding:110px 0;position:relative;z-index:2}
.sec-head{display:flex;align-items:baseline;gap:14px;margin-bottom:50px;flex-wrap:wrap}
.sec-idx{color:var(--blue);font-size:14px;letter-spacing:2px;font-family:'Space Grotesk',monospace}
.sec-title{font-family:'Space Grotesk',sans-serif;font-size:34px;font-weight:700;letter-spacing:-.5px}
.sec-sub{color:var(--muted);font-size:14px;margin-left:auto;max-width:360px;text-align:right}

/* 关于 */
.about-grid{display:grid;grid-template-columns:1.3fr 1fr;gap:48px;align-items:center}
.about-text p{color:var(--muted);font-size:16px;margin-bottom:18px}
.stats{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.stat{background:var(--glass);border:1px solid var(--line);border-radius:18px;padding:26px;text-align:center;transition:.3s}
.stat:hover{border-color:rgba(139,123,255,.4);transform:translateY(-4px)}
.stat .n{font-family:'Space Grotesk',sans-serif;font-size:44px;font-weight:700;letter-spacing:-1px;
  background:linear-gradient(120deg,var(--blue),var(--pink));-webkit-background-clip:text;background-clip:text;color:transparent}
.stat .n span{font-size:26px}
.stat .l{color:var(--muted);font-size:13px;margin-top:4px;letter-spacing:1px}

/* 技能 */
.skills{display:flex;flex-wrap:wrap;gap:14px}
.skill{display:flex;align-items:center;gap:10px;padding:14px 22px;border-radius:40px;
  background:var(--glass);border:1px solid var(--line);font-size:15px;font-weight:500;transition:.3s;cursor:default}
.skill:hover{border-color:rgba(91,209,255,.5);transform:translateY(-3px);box-shadow:0 8px 24px rgba(91,209,255,.18)}
.skill .dot{width:8px;height:8px;border-radius:50%;background:linear-gradient(120deg,var(--blue),var(--pink));box-shadow:0 0 10px var(--blue)}

/* 作品 */
.works{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.work{position:relative;height:240px;border-radius:22px;overflow:hidden;text-decoration:none;
  border:1px solid var(--line);transition:.4s;display:flex;align-items:flex-end}
.work-bg{position:absolute;inset:0;opacity:.9;transition:.5s}
.g1{background:linear-gradient(135deg,#5ad1ff,#8b7bff)}
.g2{background:linear-gradient(135deg,#8b7bff,#ff8fd0)}
.g3{background:linear-gradient(135deg,#5ad1ff,#ff8fd0)}
.g4{background:linear-gradient(135deg,#8b7bff,#5ad1ff)}
.work:hover{transform:translateY(-6px);border-color:rgba(91,209,255,.5)}
.work:hover .work-bg{transform:scale(1.08);opacity:1}
.work-body{position:relative;z-index:2;padding:26px;width:100%;
  background:linear-gradient(transparent,rgba(8,8,20,.85) 40%)}
.work-body h3{font-family:'Space Grotesk',sans-serif;font-size:23px;font-weight:600}
.work-body small{color:#cdd2f5;font-family:'Space Grotesk',monospace;display:block;margin-top:5px;font-size:12px}
.work-body p{color:#dfe3ff;font-size:14px;margin-top:8px;opacity:0;transform:translateY(8px);transition:.35s}
.work:hover .work-body p{opacity:1;transform:translateY(0)}

/* 联系 */
.contact{text-align:center}
.contact h2{font-family:'Space Grotesk',sans-serif;font-size:clamp(38px,6vw,68px);font-weight:700;margin-bottom:18px;
  background:linear-gradient(110deg,var(--blue),var(--violet),var(--pink));-webkit-background-clip:text;background-clip:text;color:transparent}
.contact>p{color:var(--muted);margin-bottom:38px;max-width:520px;margin-left:auto;margin-right:auto}
.form{max-width:560px;margin:0 auto;display:flex;flex-direction:column;gap:14px}
.form .field{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.form input,.form textarea{width:100%;padding:15px 18px;border-radius:14px;background:var(--glass);
  border:1px solid var(--line);color:var(--ink);font-size:15px;font-family:inherit;transition:.25s;resize:vertical}
.form input:focus,.form textarea:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px rgba(91,209,255,.15)}
.form ::placeholder{color:#6c7299}
.form .btn{align-self:center;margin-top:6px;cursor:pointer}
.socials{display:flex;gap:22px;justify-content:center;flex-wrap:wrap;margin-top:38px;font-size:14px;color:var(--muted)}
.socials a{text-decoration:none;transition:.25s}
.socials a:hover{color:var(--ink)}

footer{border-top:1px solid var(--line);padding:30px 0;text-align:center;color:var(--muted);
  font-size:13px;letter-spacing:1px;position:relative;z-index:2}

/* ===== 滚动揭示动画 ===== */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .8s cubic-bezier(.2,.7,.2,1),transform .8s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}

/* ===== 响应式 ===== */
@media(max-width:900px){
  .nav-links{display:none}
  .nav-cta{display:none}
  .menu-toggle{display:block}
  .orbit{display:none}
  .about-grid{grid-template-columns:1fr;gap:30px}
  .works{grid-template-columns:1fr}
  .sec-sub{display:none}
  .form .field{grid-template-columns:1fr}
}
@media(max-width:560px){
  .stats{grid-template-columns:1fr 1fr}
  .sec-title{font-size:28px}
}
@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}