:root{
  --brand-1:#7c3aed;
  --brand-2:#3b82f6;
  --ink:#1f2330;
  --sub:#5b6172;
  --line:#ece9f4;
  --bg:#ffffff;
  --soft:#f7f6fc;
  --radius:18px;
  --shadow:0 6px 24px rgba(124,58,237,.08);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.7;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:1080px;margin:0 auto;padding:0 24px}

/* Nav */
header.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.85);
  backdrop-filter:saturate(180%) blur(8px);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{font-weight:700;font-size:18px;letter-spacing:.5px}
.logo span{background:linear-gradient(135deg,var(--brand-1),var(--brand-2));-webkit-background-clip:text;background-clip:text;color:transparent}
.nav-links{display:flex;gap:28px;font-size:14px;color:var(--sub)}
.nav-links a:hover{color:var(--brand-1)}
@media(max-width:680px){.nav-links{display:none}}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 24px;border-radius:12px;font-size:15px;font-weight:600;transition:transform .15s ease,box-shadow .15s ease}
.btn-primary{background:linear-gradient(135deg,var(--brand-1),var(--brand-2));color:#fff;box-shadow:var(--shadow)}
.btn-primary:hover{transform:translateY(-2px)}
.btn-ghost{border:1px solid var(--line);color:var(--ink);background:#fff}
.btn-ghost:hover{border-color:var(--brand-1);color:var(--brand-1)}

/* Hero */
.hero{padding:96px 0 80px;text-align:center}
.eyebrow{display:inline-block;font-size:13px;letter-spacing:1.5px;text-transform:uppercase;color:var(--brand-1);background:var(--soft);border:1px solid var(--line);border-radius:999px;padding:6px 16px;margin-bottom:22px}
.hero h1{font-size:46px;line-height:1.2;font-weight:800;letter-spacing:-.5px}
.hero h1 .grad{background:linear-gradient(135deg,var(--brand-1),var(--brand-2));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{max-width:620px;margin:20px auto 0;color:var(--sub);font-size:17px}
.hero-cta{display:flex;gap:14px;justify-content:center;margin-top:34px}

/* Section */
section.block{padding:72px 0;border-top:1px solid var(--line)}
.sec-head{text-align:center;margin-bottom:48px}
.sec-tag{font-size:13px;letter-spacing:1.5px;text-transform:uppercase;color:var(--brand-2);font-weight:700}
.sec-head h2{font-size:32px;font-weight:800;margin-top:8px;letter-spacing:-.3px}
.sec-head p{color:var(--sub);margin-top:10px}

/* Skills */
.skill-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
@media(max-width:780px){.skill-grid{grid-template-columns:repeat(2,1fr)}}
.skill{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;text-align:center;transition:transform .15s ease,box-shadow .15s ease}
.skill:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.skill .ic{width:44px;height:44px;margin:0 auto 12px;border-radius:12px;display:grid;place-items:center;background:linear-gradient(135deg,var(--brand-1),var(--brand-2));color:#fff;font-size:20px}
.skill h4{font-size:15px}
.skill p{font-size:13px;color:var(--sub);margin-top:6px}

/* Projects */
.proj-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
@media(max-width:780px){.proj-grid{grid-template-columns:1fr}}
.proj{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:transform .15s ease,box-shadow .15s ease}
.proj:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.proj .thumb{height:160px;background:linear-gradient(135deg,var(--brand-1),var(--brand-2));position:relative}
.proj .thumb span{position:absolute;left:20px;bottom:16px;color:#fff;font-size:22px;font-weight:700;letter-spacing:.5px}
.proj .body{padding:20px}
.proj .body h4{font-size:17px}
.proj .body p{font-size:14px;color:var(--sub);margin:8px 0 16px}
.proj .body .meta{display:flex;gap:10px;flex-wrap:wrap}
.proj .body .meta span{font-size:12px;color:var(--brand-1);background:var(--soft);border:1px solid var(--line);border-radius:999px;padding:4px 12px}
.proj .more{margin-top:14px;font-size:14px;font-weight:600;color:var(--brand-1)}

/* Contact */
.contact{text-align:center}
.contact .box{background:var(--soft);border:1px solid var(--line);border-radius:var(--radius);padding:48px 24px;max-width:720px;margin:0 auto}
.contact h2{font-size:28px;font-weight:800}
.contact p{color:var(--sub);margin:12px 0 26px}
.contact-links{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* Footer */
footer{text-align:center;padding:32px 0;color:var(--sub);font-size:13px;border-top:1px solid var(--line)}

/* ===== Detail page ===== */
.breadcrumb{padding:28px 0 0;font-size:13px;color:var(--sub)}
.breadcrumb a:hover{color:var(--brand-1)}
.breadcrumb span{margin:0 8px;color:var(--line)}
.detail-hero{padding:32px 0 20px}
.detail-hero .tags{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:16px}
.detail-hero .tags span{font-size:12px;color:var(--brand-1);background:var(--soft);border:1px solid var(--line);border-radius:999px;padding:4px 12px}
.detail-hero h1{font-size:38px;font-weight:800;letter-spacing:-.4px}
.detail-hero .lead{color:var(--sub);font-size:17px;margin-top:14px;max-width:760px}
.cover{height:300px;background:linear-gradient(135deg,var(--brand-1),var(--brand-2));border-radius:var(--radius);margin:28px 0}
.detail-body{padding:24px 0 72px}
.detail-body h2{font-size:22px;font-weight:700;margin:36px 0 14px;padding-left:12px;border-left:4px solid var(--brand-1)}
.detail-body p{color:var(--sub);margin-bottom:14px}
.detail-body ul{color:var(--sub);padding-left:20px;margin-bottom:14px}
.detail-body li{margin-bottom:8px}
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin:24px 0}
@media(max-width:680px){.stats{grid-template-columns:1fr}}
.stat{background:var(--soft);border:1px solid var(--line);border-radius:var(--radius);padding:24px;text-align:center}
.stat .num{font-size:34px;font-weight:800;background:linear-gradient(135deg,var(--brand-1),var(--brand-2));-webkit-background-clip:text;background-clip:text;color:transparent}
.stat .label{font-size:13px;color:var(--sub);margin-top:6px}
.gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:18px}
@media(max-width:680px){.gallery{grid-template-columns:1fr}}
.gallery .shot{height:120px;background:var(--soft);border:1px solid var(--line);border-radius:12px;display:grid;place-items:center;color:var(--sub);font-size:13px}
.back-link{display:inline-flex;align-items:center;gap:8px;margin-top:40px;font-weight:600;color:var(--brand-1)}