/* ============================================
   安 · 作品集  —  深色玻璃拟态
   纯手写，无依赖
   ============================================ */

:root {
  --bg: #05060a;
  --ink: #f2f4f8;
  --ink-dim: #9aa3b2;
  --ink-faint: #6b7280;
  --violet: #7c5cff;
  --cyan: #22d3ee;
  --line: rgba(255, 255, 255, 0.09);
  --glass: rgba(255, 255, 255, 0.045);
  --glass-strong: rgba(255, 255, 255, 0.075);
  --radius: 18px;
  --maxw: 1080px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

::selection {
  background: rgba(124, 92, 255, 0.35);
  color: #fff;
}

/* ---------- 背景光斑 ---------- */

.bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}

.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.4;
  will-change: transform;
}

.blob-1 {
  width: 46vw;
  height: 46vw;
  top: -14vw;
  left: -10vw;
  background: radial-gradient(circle at 30% 30%, #6d4dff, transparent 70%);
  animation: drift1 26s var(--ease) infinite alternate;
}

.blob-2 {
  width: 40vw;
  height: 40vw;
  top: 20vh;
  right: -12vw;
  background: radial-gradient(circle at 60% 40%, #0ea5c6, transparent 70%);
  opacity: 0.3;
  animation: drift2 32s var(--ease) infinite alternate;
}

.blob-3 {
  width: 34vw;
  height: 34vw;
  bottom: -16vw;
  left: 28vw;
  background: radial-gradient(circle at 50% 50%, #8b5cf6, transparent 72%);
  opacity: 0.22;
  animation: drift3 38s var(--ease) infinite alternate;
}

@keyframes drift1 { to { transform: translate3d(8vw, 6vh, 0) scale(1.15); } }
@keyframes drift2 { to { transform: translate3d(-7vw, 10vh, 0) scale(1.1); } }
@keyframes drift3 { to { transform: translate3d(6vw, -8vh, 0) scale(1.08); } }

.grain {
  position: absolute;
  inset: 0;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='3'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ---------- 导航 ---------- */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 22px 28px;
  transition: padding 0.35s var(--ease), background 0.35s var(--ease),
    backdrop-filter 0.35s var(--ease), border-color 0.35s var(--ease);
  border-bottom: 1px solid transparent;
}

.nav.scrolled {
  padding: 12px 28px;
  background: rgba(5, 6, 10, 0.62);
  backdrop-filter: blur(18px) saturate(150%);
  -webkit-backdrop-filter: blur(18px) saturate(150%);
  border-bottom-color: var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--ink);
  text-decoration: none;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.brand-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--violet), var(--cyan));
  box-shadow: 0 0 14px rgba(124, 92, 255, 0.85);
}

.nav-links {
  display: flex;
  gap: 26px;
}

.nav-links a {
  color: var(--ink-dim);
  text-decoration: none;
  font-size: 14.5px;
  transition: color 0.2s;
  position: relative;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--violet), var(--cyan));
  transition: width 0.3s var(--ease);
}

.nav-links a:hover { color: var(--ink); }
.nav-links a:hover::after { width: 100%; }

/* ---------- 通用版式 ---------- */

main {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 28px;
}

.section { padding: 88px 0; }

.section-head { margin-bottom: 40px; }

.section-head h2,
.about-grid h2 {
  font-size: clamp(26px, 3.4vw, 34px);
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0 0 8px;
}

.section-head p {
  margin: 0;
  color: var(--ink-dim);
  font-size: 15.5px;
}

.grad {
  background: linear-gradient(100deg, #a78bfa 0%, #7c5cff 40%, #22d3ee 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- 首屏 ---------- */

.hero {
  min-height: 92vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 140px 0 60px;
}

.eyebrow {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 12.5px;
  letter-spacing: 0.22em;
  color: var(--ink-faint);
  margin: 0 0 22px;
}

.hero h1 {
  font-size: clamp(40px, 7.4vw, 82px);
  line-height: 1.08;
  font-weight: 700;
  letter-spacing: -0.035em;
  margin: 0 0 26px;
}

.lead {
  max-width: 44ch;
  color: var(--ink-dim);
  font-size: clamp(15.5px, 1.6vw, 18px);
  margin: 0 0 34px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 46px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 46px;
  padding: 0 24px;
  border-radius: 999px;
  font-size: 14.5px;
  font-weight: 500;
  text-decoration: none;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease),
    background 0.25s, border-color 0.25s;
  will-change: transform;
}

.btn-primary {
  color: #0a0812;
  background: linear-gradient(135deg, #b7a6ff, #7c5cff 55%, #22d3ee);
  box-shadow: 0 10px 34px -12px rgba(124, 92, 255, 0.9);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 40px -12px rgba(124, 92, 255, 1);
}

.btn-ghost {
  color: var(--ink);
  border: 1px solid var(--line);
  background: var(--glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.btn-ghost:hover {
  transform: translateY(-2px);
  background: var(--glass-strong);
  border-color: rgba(255, 255, 255, 0.2);
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.chips li {
  font-size: 13px;
  color: var(--ink-dim);
  padding: 7px 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--glass);
}

/* ---------- 作品卡片 ---------- */

.grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}

/* 奇数个作品时，最后一个占满整行 */
@media (min-width: 861px) {
  .grid > .card:last-child:nth-child(odd) { grid-column: 1 / -1; }
}

.card {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--glass);
  border: 1px solid var(--line);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  transition: transform 0.4s var(--ease), border-color 0.4s, box-shadow 0.4s;
}

.card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(140deg, rgba(255, 255, 255, 0.22), transparent 38%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.4s;
  pointer-events: none;
}

.card:hover {
  transform: translateY(-5px);
  border-color: rgba(255, 255, 255, 0.16);
  box-shadow: 0 24px 60px -28px rgba(0, 0, 0, 0.9),
    0 0 0 1px rgba(124, 92, 255, 0.16);
}

.card:hover::before { opacity: 1; }

.thumb {
  height: 168px;
  display: grid;
  place-items: center;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 34px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.86);
  position: relative;
  overflow: hidden;
}

.thumb span {
  position: relative;
  z-index: 1;
  transition: transform 0.5s var(--ease);
}

.card:hover .thumb span { transform: scale(1.08); }

.thumb-a { background: radial-gradient(120% 120% at 20% 15%, #4c1d95, #0b0a18 72%); }
.thumb-b { background: radial-gradient(120% 120% at 80% 10%, #0e7490, #06121a 72%); }
.thumb-c { background: radial-gradient(120% 120% at 30% 85%, #9333ea, #12091d 72%); }
.thumb-d { background: radial-gradient(120% 120% at 70% 30%, #1d4ed8, #080b18 72%); }
.thumb-e {
  background: conic-gradient(from 210deg at 50% 58%, #5b21b6, #0e7490 26%, #7f1d1d 52%, #b45309 74%, #5b21b6);
}
.thumb-f {
  background: radial-gradient(120% 120% at 50% 28%, #8a6722, #100d06 74%);
  color: #f0dca8;
}
.thumb-g {
  background: radial-gradient(120% 120% at 50% 100%, #0f766e, #061019 72%);
}
.thumb-h {
  background: radial-gradient(120% 120% at 50% 92%, #c2410c, #170a14 74%);
}
.thumb-e span,
.thumb-f span,
.thumb-g span,
.thumb-h span { font-size: 26px; letter-spacing: 0.12em; }

.thumb::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.06) 1px, transparent 1px);
  background-size: 26px 26px;
  mask-image: radial-gradient(circle at 50% 50%, #000, transparent 78%);
  -webkit-mask-image: radial-gradient(circle at 50% 50%, #000, transparent 78%);
}

.card-body { padding: 22px 22px 24px; }

.card-top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.card-top h3 {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.year {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px;
  color: var(--ink-faint);
}

.card-body p {
  margin: 0 0 16px;
  color: var(--ink-dim);
  font-size: 14.5px;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
  padding-bottom: 2px;
  transition: gap 0.25s var(--ease), border-color 0.25s;
}

.card-link:hover {
  gap: 11px;
  border-bottom-color: var(--violet);
}

/* ---------- 关于 ---------- */

.about-grid {
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  gap: 56px;
  align-items: start;
}

.about-text {
  color: var(--ink-dim);
  font-size: 15.5px;
  margin: 16px 0 0;
}

.facts {
  list-style: none;
  margin: 0;
  padding: 8px 0;
  display: grid;
  gap: 4px;
}

.facts li {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 16px 4px;
  border-bottom: 1px solid var(--line);
}

.facts strong {
  font-size: 28px;
  font-weight: 600;
  letter-spacing: -0.02em;
  background: linear-gradient(120deg, #fff, #a7a3ff);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  min-width: 84px;
}

.facts span { color: var(--ink-dim); font-size: 14.5px; }

/* ---------- 联系 ---------- */

.contact-card {
  padding: 54px 40px;
  border-radius: 26px;
  text-align: center;
  background: linear-gradient(160deg, rgba(124, 92, 255, 0.16), rgba(255, 255, 255, 0.03) 55%);
  border: 1px solid var(--line);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.contact-card h2 {
  font-size: clamp(24px, 3.2vw, 32px);
  margin: 0 0 10px;
  font-weight: 600;
}

.contact-card p {
  color: var(--ink-dim);
  margin: 0 0 28px;
  font-size: 15.5px;
}

/* ---------- 页脚 ---------- */

.foot {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 40px 28px 56px;
  border-top: 1px solid var(--line);
}

.foot p {
  margin: 0;
  color: var(--ink-faint);
  font-size: 13px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

/* ---------- 入场动画 ---------- */

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.75s var(--ease), transform 0.75s var(--ease);
}

.reveal.in {
  opacity: 1;
  transform: translateY(0);
}

/* 卡片入场后仍要保留 hover 位移（.reveal.in 的 transform 会压掉 .card:hover） */
.card.reveal.in {
  transition: opacity 0.75s var(--ease), transform 0.4s var(--ease),
    border-color 0.4s, box-shadow 0.4s;
}

.card.reveal.in:hover {
  transform: translateY(-5px);
}

/* ---------- 响应式 ---------- */

@media (max-width: 860px) {
  .about-grid { grid-template-columns: 1fr; gap: 34px; }
  .grid { grid-template-columns: 1fr; }
  .section { padding: 68px 0; }
}

@media (max-width: 560px) {
  main, .nav, .foot { padding-left: 20px; padding-right: 20px; }
  .nav { padding-top: 16px; padding-bottom: 16px; }
  .nav.scrolled { padding-top: 10px; padding-bottom: 10px; }
  .nav-links { gap: 18px; }
  .hero { padding-top: 118px; min-height: 88vh; }
  .contact-card { padding: 40px 22px; }
  .facts strong { min-width: 72px; font-size: 24px; }
  .thumb { height: 140px; }
  .btn { height: 44px; padding: 0 20px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}