/* ─────────────────────────────────────────────
   xAI-inspired personal homepage — refined
   Dark · Minimal · Aurora accent · Quiet motion
───────────────────────────────────────────── */

/* 中文：Source Han Serif SC VF Semibold（思源宋体）
   英数：JetBrains Mono —— 全字重自托管于 fonts/，不依赖访客设备是否安装，桌面与移动端渲染一致
   网页回退：Noto Serif SC 600（与思源宋体同源）——优先本站自托管，CDN 兜底 */
@font-face {
  font-family: "Source Han Serif SC";
  src:
    local("Source Han Serif SC VF"),
    local("Source Han Serif SC Semibold"),
    local("Source Han Serif SC"),
    local("Noto Serif SC"),
    url("./fonts/noto-serif-sc-600.woff2") format("woff2"),
    url("https://cdn.jsdelivr.net/fontsource/fonts/noto-serif-sc@5.2.5/chinese-simplified-600-normal.woff2")
      format("woff2");
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}

/* JetBrains Mono 自托管（Regular/Medium/SemiBold/Bold）。
   刻意不写 local()——所有平台统一加载本站字体文件。 */
@font-face {
  font-family: "JetBrains Mono";
  src: url("./fonts/jetbrains-mono-regular.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "JetBrains Mono";
  src: url("./fonts/jetbrains-mono-medium.woff2") format("woff2");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "JetBrains Mono";
  src: url("./fonts/jetbrains-mono-semibold.woff2") format("woff2");
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "JetBrains Mono";
  src: url("./fonts/jetbrains-mono-bold.woff2") format("woff2");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

:root {
  --bg: #050507;
  --bg-elevated: #0a0a0d;
  --bg-card: #0c0c10;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.16);
  --text: #f5f5f7;
  --text-muted: #8b8b93;
  --text-dim: #5b5b63;
  /* Aurora accent — 克制的单一记忆点 */
  --accent: #7c8cff;
  --accent-2: #b47cff;
  --accent-soft: rgba(124, 140, 255, 0.12);
  --grad: linear-gradient(120deg, var(--accent), var(--accent-2));
  --glow-a: rgba(110, 123, 255, 0.16);
  --glow-b: rgba(255, 255, 255, 0.04);
  --glow-c: rgba(180, 124, 255, 0.1);
  --radius: 14px;
  /* 英数：自托管 JetBrains Mono；加载失败时回退到系统等宽字体 */
  --font-en: "JetBrains Mono", ui-monospace, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  --font-cn: "Source Han Serif SC", "Source Han Serif SC VF", "Noto Serif SC", "Songti SC", "STSong", serif;
  --font: var(--font-en), var(--font-cn);
  --mono: var(--font-en);
  --weight-cn: 600;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --max: 1120px;
  --nav-h: 4.5rem;
}

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

html {
  scroll-behavior: smooth;
  color-scheme: dark;
}

body {
  font-family: var(--font);
  font-weight: var(--weight-cn);
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body.menu-open {
  overflow: hidden;
}

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

button {
  font: inherit;
  border: none;
  background: none;
  cursor: pointer;
  color: inherit;
}

img {
  max-width: 100%;
  display: block;
}

.mono {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  font-weight: 500;
}

/* Custom scrollbar */
::-webkit-scrollbar {
  width: 10px;
}
::-webkit-scrollbar-track {
  background: var(--bg);
}
::-webkit-scrollbar-thumb {
  background: #1d1d24;
  border-radius: 8px;
  border: 2px solid var(--bg);
}
::-webkit-scrollbar-thumb:hover {
  background: #2a2a34;
}

/* Scroll progress */
.progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--grad);
  transform-origin: left;
  transform: scaleX(0);
  z-index: 300;
  pointer-events: none;
}

/* Cursor glow — 跟随鼠标的柔和环境光 */
.cursor-glow {
  position: fixed;
  top: 0;
  left: 0;
  width: 560px;
  height: 560px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(124, 140, 255, 0.07), transparent 60%);
  transform: translate(-50%, -50%);
  pointer-events: none;
  z-index: 2;
}

@media (pointer: coarse) {
  .cursor-glow {
    display: none;
  }
}

/* Ambient layers */
.noise {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1000;
  opacity: 0.03;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 180px;
}

.stars {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.55;
}

.glow {
  position: fixed;
  border-radius: 50%;
  filter: blur(110px);
  pointer-events: none;
  z-index: 0;
}

.glow-1 {
  width: 560px;
  height: 560px;
  top: -140px;
  right: -100px;
  background: var(--glow-a);
  animation: drift 18s ease-in-out infinite alternate;
}

.glow-2 {
  width: 420px;
  height: 420px;
  bottom: 8%;
  left: -140px;
  background: var(--glow-b);
  animation: drift 22s ease-in-out infinite alternate-reverse;
}

.glow-3 {
  width: 340px;
  height: 340px;
  top: 48%;
  right: 12%;
  background: var(--glow-c);
  animation: drift 26s ease-in-out infinite alternate;
  opacity: 0.75;
}

@keyframes drift {
  from { transform: translate(0, 0) scale(1); }
  to { transform: translate(-40px, 30px) scale(1.08); }
}

/* Navigation — 悬浮式玻璃胶囊 */
.nav {
  position: fixed;
  top: 1rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  width: min(var(--max), calc(100% - 2rem));
  padding: 0.6rem 0.6rem 0.6rem 1.3rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(8, 8, 11, 0.55);
  backdrop-filter: blur(18px) saturate(1.4);
  -webkit-backdrop-filter: blur(18px) saturate(1.4);
  box-shadow: 0 10px 36px rgba(0, 0, 0, 0.35);
  transition:
    background 0.3s var(--ease),
    border-color 0.3s var(--ease),
    box-shadow 0.3s var(--ease);
}

.nav.is-scrolled {
  background: rgba(8, 8, 11, 0.78);
  border-color: var(--border-strong);
  box-shadow: 0 12px 44px rgba(0, 0, 0, 0.5);
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 0.95rem;
  font-weight: var(--weight-cn);
  letter-spacing: 0.06em;
  z-index: 2;
}

.logo-mark {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--grad);
  box-shadow: 0 0 12px rgba(124, 140, 255, 0.55);
  transition: box-shadow 0.3s var(--ease), transform 0.3s var(--ease);
}

.logo:hover .logo-mark {
  transform: scale(1.12);
  box-shadow: 0 0 20px rgba(124, 140, 255, 0.8);
}

.logo-text {
  opacity: 0.92;
}

.nav-links {
  display: none;
  gap: 0.35rem;
  align-items: center;
  margin-left: auto;
}

.nav-links a {
  position: relative;
  font-size: 0.845rem;
  color: var(--text-muted);
  padding: 0.4rem 0.85rem;
  border-radius: 999px;
  transition: color 0.25s var(--ease), background 0.25s var(--ease);
}

.nav-links a:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
}

.nav-links a.is-active {
  color: var(--text);
  background: var(--accent-soft);
}

.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 40px;
  height: 40px;
  padding: 0 8px;
}

.nav-toggle span {
  display: block;
  height: 1.5px;
  width: 100%;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.3s var(--ease), opacity 0.3s var(--ease);
}

.nav-toggle[aria-expanded="true"] span:first-child {
  transform: translateY(3.75px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:last-child {
  transform: translateY(-3.75px) rotate(-45deg);
}

@media (min-width: 768px) {
  .nav-links {
    display: flex;
  }

  .nav-toggle {
    display: none;
  }
}

/* Mobile menu */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 90;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 2.5rem;
  padding: 6rem 1.75rem 3rem;
  background: rgba(5, 5, 7, 0.96);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.35s var(--ease), visibility 0.35s var(--ease);
}

.mobile-menu.is-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.mobile-menu[hidden] {
  display: flex;
}

.mobile-links {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.mobile-links a {
  font-size: clamp(1.75rem, 6vw, 2.25rem);
  font-weight: 500;
  letter-spacing: -0.03em;
  padding: 0.65rem 0;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
  transition: color 0.25s var(--ease), padding-left 0.25s var(--ease);
}

.mobile-links a:hover,
.mobile-links a:focus-visible {
  color: var(--text);
  padding-left: 0.5rem;
}

.mobile-cta {
  align-self: flex-start;
}

@media (min-width: 768px) {
  .mobile-menu {
    display: none !important;
  }
}

/* Layout */
main {
  position: relative;
  z-index: 1;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 7.5rem 0 2rem;
  scroll-margin-top: 6rem;
}

.section-label {
  display: flex;
  align-items: center;
  gap: 1rem;
  color: var(--text-dim);
  margin-bottom: 1.75rem;
  text-transform: uppercase;
}

.section-label::after {
  content: "";
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--border), transparent);
}

.section-title {
  font-size: clamp(1.8rem, 4.2vw, 2.75rem);
  font-weight: var(--weight-cn);
  letter-spacing: 0.01em;
  line-height: 1.3;
  color: var(--text);
}

.section-title.tight {
  margin-bottom: 2.5rem;
}

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 9rem 0 6rem;
}

/* 工程网格背景，向中心聚拢后淡出 */
.hero::before {
  content: "";
  position: absolute;
  inset: 0 -1.5rem;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: radial-gradient(ellipse 75% 65% at 42% 42%, black 25%, transparent 78%);
  mask-image: radial-gradient(ellipse 75% 65% at 42% 42%, black 25%, transparent 78%);
  pointer-events: none;
}

.hero > * {
  position: relative;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
  width: fit-content;
  padding: 0.42rem 0.85rem 0.42rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.02);
  backdrop-filter: blur(6px);
}

.pulse {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #5dff9a;
  box-shadow: 0 0 0 0 rgba(93, 255, 154, 0.5);
  animation: pulse 2.2s ease-out infinite;
}

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(93, 255, 154, 0.45); }
  70% { box-shadow: 0 0 0 8px rgba(93, 255, 154, 0); }
  100% { box-shadow: 0 0 0 0 rgba(93, 255, 154, 0); }
}

.hero-title {
  font-size: clamp(2.75rem, 8vw, 5.4rem);
  font-weight: var(--weight-cn);
  letter-spacing: 0.015em;
  line-height: 1.14;
  margin-bottom: 1.6rem;
  max-width: 10em;
}

.hero-title em {
  font-style: normal;
  font-weight: var(--weight-cn);
  background: linear-gradient(120deg, var(--accent) 0%, #f5f5f7 45%, var(--accent-2) 100%);
  background-size: 220% auto;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: shimmer 8s ease-in-out infinite;
}

@keyframes shimmer {
  0%, 100% { background-position: 0% center; }
  50% { background-position: 100% center; }
}

.hero-sub {
  max-width: 34rem;
  font-size: 1.08rem;
  color: var(--text-muted);
  margin-bottom: 2.4rem;
  font-weight: 400;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-bottom: 3rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.5rem;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: var(--weight-cn);
  transition:
    transform 0.25s var(--ease),
    background 0.25s var(--ease),
    border-color 0.25s var(--ease),
    color 0.25s var(--ease),
    box-shadow 0.25s var(--ease);
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: var(--text);
  color: #050507;
}

.btn-primary:hover {
  background: #fff;
  box-shadow: 0 10px 32px rgba(124, 140, 255, 0.3);
}

.btn.is-copied {
  pointer-events: none;
  transform: none;
  background: var(--accent);
  color: #050507;
}

.btn-ghost {
  border: 1px solid var(--border-strong);
  color: var(--text);
  background: rgba(255, 255, 255, 0.02);
}

.btn-ghost:hover {
  border-color: rgba(124, 140, 255, 0.5);
  background: var(--accent-soft);
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-dim);
}

.hero-meta .dot {
  opacity: 0.5;
}

.scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: 0;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--text-dim);
  opacity: 0.7;
}

.scroll-line {
  width: 36px;
  height: 1px;
  background: linear-gradient(90deg, var(--accent), transparent);
  animation: line-breathe 2.4s ease-in-out infinite;
}

@keyframes line-breathe {
  0%, 100% { width: 28px; opacity: 0.5; }
  50% { width: 44px; opacity: 1; }
}

@media (max-width: 640px) {
  .scroll-hint {
    display: none;
  }
}

/* Marquee — 无限滚动缎带 */
.marquee {
  position: relative;
  z-index: 1;
  overflow: hidden;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 1.05rem 0;
  background: rgba(255, 255, 255, 0.012);
  -webkit-mask-image: linear-gradient(90deg, transparent, black 10%, black 90%, transparent);
  mask-image: linear-gradient(90deg, transparent, black 10%, black 90%, transparent);
}

.marquee-track {
  display: flex;
  gap: 2.75rem;
  width: max-content;
  animation: marquee 30s linear infinite;
}

.marquee:hover .marquee-track {
  animation-play-state: paused;
}

.marquee-track span {
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--text-dim);
  white-space: nowrap;
}

.marquee-track i {
  font-style: normal;
  color: var(--accent);
  opacity: 0.8;
}

@keyframes marquee {
  to { transform: translateX(-50%); }
}

/* About */
.about-grid {
  display: grid;
  gap: 2.5rem;
}

@media (min-width: 900px) {
  .about-grid {
    grid-template-columns: 1.1fr 1fr;
    gap: 4rem;
    align-items: start;
  }
}

.about-copy p {
  color: var(--text-muted);
  font-size: 1.05rem;
  margin-bottom: 1.1rem;
  max-width: 36rem;
}

.traits {
  list-style: none;
  margin-top: 2rem;
  border-top: 1px solid var(--border);
}

.traits li {
  display: grid;
  grid-template-columns: 5.5rem 1fr;
  gap: 1rem;
  padding: 1rem 0.25rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.95rem;
  transition: background 0.25s var(--ease), padding-left 0.25s var(--ease);
}

.traits li:hover {
  background: linear-gradient(90deg, var(--accent-soft), transparent 65%);
  padding-left: 0.6rem;
}

.trait-key {
  color: var(--text-dim);
  text-transform: uppercase;
}

.curiosity {
  display: flex;
  align-items: baseline;
  justify-content: center;
  text-align: center;
  gap: 0.6rem;
  margin-top: 3.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.curiosity-mark {
  font-size: clamp(2.25rem, 4.5vw, 3rem);
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.02em;
}

.curiosity-label {
  font-size: 1.1rem;
  color: var(--text-dim);
}

@media (max-width: 520px) {
  .traits li {
    grid-template-columns: 1fr;
    gap: 0.35rem;
  }
}

/* Work */
.work-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--border);
}

.work-item {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 1.25rem;
  align-items: start;
  padding: 1.9rem 0.75rem 1.9rem 0;
  border-bottom: 1px solid var(--border);
  transition: background 0.3s var(--ease), padding 0.3s var(--ease);
}

/* 左侧 accent 竖线扫入 */
.work-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 2px;
  height: 100%;
  background: var(--grad);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 0.35s var(--ease);
}

.work-item:hover {
  background: linear-gradient(90deg, rgba(124, 140, 255, 0.045), transparent 70%);
  padding-left: 0.9rem;
}

.work-item:hover::before {
  transform: scaleY(1);
}

.work-index {
  color: var(--text-dim);
  padding-top: 0.3rem;
  min-width: 2rem;
  transition: color 0.3s var(--ease);
}

.work-item:hover .work-index {
  color: var(--accent);
}

.work-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.65rem 1rem;
  margin-bottom: 0.45rem;
}

.work-body h3 {
  font-size: 1.2rem;
  font-weight: var(--weight-cn);
  letter-spacing: 0.01em;
}

.work-year {
  color: var(--text-dim);
}

.work-body p {
  color: var(--text-muted);
  font-size: 0.95rem;
  max-width: 36rem;
  margin-bottom: 0.85rem;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.tags span {
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  color: var(--text-dim);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.25rem 0.55rem;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.work-item:hover .tags span {
  color: var(--text-muted);
  border-color: var(--border-strong);
}

.work-link {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px solid var(--border);
  color: var(--text-muted);
  transition:
    color 0.25s var(--ease),
    border-color 0.25s var(--ease),
    background 0.25s var(--ease),
    transform 0.25s var(--ease),
    box-shadow 0.25s var(--ease);
}

.work-link svg {
  transition: transform 0.3s var(--ease);
}

.work-item:hover .work-link {
  color: #050507;
  border-color: transparent;
  background: var(--text);
  transform: translate(2px, -2px);
  box-shadow: 0 8px 24px rgba(124, 140, 255, 0.3);
}

.work-item:hover .work-link svg {
  transform: rotate(45deg);
}

@media (max-width: 640px) {
  .work-item {
    grid-template-columns: auto 1fr;
    padding-right: 0;
  }

  .work-link {
    grid-column: 2;
    justify-self: start;
  }
}

/* Blog / notes — 聚光灯卡片 */
.notes {
  display: grid;
  gap: 1rem;
}

@media (min-width: 768px) {
  .notes {
    grid-template-columns: repeat(3, 1fr);
  }
}

.note {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 1.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.02), transparent 40%),
    var(--bg-card);
  transition:
    border-color 0.3s var(--ease),
    transform 0.3s var(--ease),
    box-shadow 0.3s var(--ease);
  min-height: 210px;
  overflow: hidden;
}

/* 鼠标聚光灯 */
.note::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(
    260px circle at var(--mx, 50%) var(--my, 50%),
    rgba(124, 140, 255, 0.13),
    transparent 65%
  );
  opacity: 0;
  transition: opacity 0.35s var(--ease);
  pointer-events: none;
}

.note:hover {
  border-color: rgba(124, 140, 255, 0.35);
  transform: translateY(-4px);
  box-shadow: 0 18px 44px rgba(0, 0, 0, 0.4);
}

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

.note > * {
  position: relative;
}

.note time {
  color: var(--text-dim);
}

.note h3 {
  font-size: 1.05rem;
  font-weight: var(--weight-cn);
  letter-spacing: 0.01em;
  line-height: 1.4;
}

.note p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.note-arrow {
  margin-top: auto;
  color: var(--text-dim);
  transition: color 0.25s var(--ease), transform 0.25s var(--ease);
}

.note:hover .note-arrow {
  color: var(--accent);
  transform: translateX(4px);
}

/* Section-level "more" link — 列表末尾的出口 */
.section-more {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  width: fit-content;
  margin-left: auto;
  margin-top: 1.75rem;
  color: var(--text-dim);
  letter-spacing: 0.08em;
  transition: color 0.25s var(--ease);
}

.section-more svg {
  transition: transform 0.25s var(--ease);
}

.section-more:hover {
  color: var(--accent);
}

.section-more:hover svg {
  transform: translateX(4px);
}

/* Contact */
.contact {
  padding-bottom: 5rem;
}

.contact-panel {
  border: 1px solid var(--border);
  border-radius: 22px;
  padding: clamp(2.25rem, 5vw, 3.75rem);
  background:
    radial-gradient(ellipse 80% 60% at 100% 0%, rgba(110, 123, 255, 0.14), transparent 55%),
    radial-gradient(ellipse 50% 40% at 0% 100%, rgba(180, 124, 255, 0.09), transparent 50%),
    linear-gradient(180deg, #0b0b0f, #08080a);
  position: relative;
  overflow: hidden;
}

.contact-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(255, 255, 255, 0.045) 0%,
    transparent 40%,
    transparent 100%
  );
  pointer-events: none;
}

/* 面板内的鼠标聚光灯 */
.contact-panel::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(
    420px circle at var(--mx, 80%) var(--my, 20%),
    rgba(124, 140, 255, 0.09),
    transparent 70%
  );
  opacity: 0;
  transition: opacity 0.4s var(--ease);
  pointer-events: none;
}

.contact-panel:hover::after {
  opacity: 1;
}

.contact-panel > * {
  position: relative;
  z-index: 1;
}

.contact-copy {
  color: var(--text-muted);
  max-width: 32rem;
  margin: 1.25rem 0 2rem;
  font-size: 1.05rem;
}

.contact-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.5rem;
}

.socials {
  display: flex;
  gap: 1.25rem;
}

.social {
  font-size: 0.875rem;
  color: var(--text-muted);
  transition: color 0.25s var(--ease);
  position: relative;
}

.social::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 1px;
  background: var(--grad);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s var(--ease);
}

.social:hover {
  color: var(--text);
}

.social:hover::after {
  transform: scaleX(1);
}

/* Footer */
.footer {
  position: relative;
  z-index: 1;
  max-width: var(--max);
  margin: 0 auto;
  padding: 2rem 1.5rem 3rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
  color: var(--text-dim);
}

.footer-word {
  font-family: var(--mono);
  font-size: clamp(2.6rem, 11vw, 8.5rem);
  font-weight: 700;
  letter-spacing: 0.1em;
  line-height: 1;
  text-align: center;
  color: transparent;
  -webkit-text-stroke: 1px rgba(255, 255, 255, 0.09);
  user-select: none;
  transition: -webkit-text-stroke 0.4s var(--ease);
}

.footer-word:hover {
  -webkit-text-stroke: 1px rgba(124, 140, 255, 0.35);
}

.footer-row {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.footer-line {
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* 备案信息 */
.beian {
  display: flex;
  justify-content: center;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.35rem 0.9rem;
}

.beian a {
  color: var(--text-dim);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  opacity: 0.75;
  transition: color 0.25s var(--ease), opacity 0.25s var(--ease);
}

.beian a:hover {
  color: var(--text-muted);
  opacity: 1;
}

.beian-sep {
  opacity: 0.35;
}

/* 公安备案占位 —— 号码下发后换成 <a> 链接（beian.gov.cn?recordcode=号码），并复用 .beian a 样式 */
.beian-pending {
  color: var(--text-dim);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  opacity: 0.5;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.18);
  padding-bottom: 1px;
}

/* Reveal animations */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

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

/* Selection */
::selection {
  background: rgba(124, 140, 255, 0.28);
  color: #fff;
}

/* Focus */
:focus-visible {
  outline: 1px solid rgba(124, 140, 255, 0.6);
  outline-offset: 3px;
  border-radius: 2px;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .glow,
  .pulse,
  .scroll-line,
  .hero-title em,
  .marquee-track {
    animation: none !important;
  }

  .cursor-glow {
    display: none;
  }

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .btn:hover,
  .note:hover,
  .work-item:hover .work-link {
    transform: none;
  }
}