/* =========================================================
   LIN // Portfolio
   暗色科技风 —— 参考 xskin.us.ci 的克制动画语言
   - 分段 riseIn 入场 / lineGrow 下划线 / 高光扫过 / 图标旋转
   - 细边框 + 直角 + 宽字距大写小标签
   ========================================================= */

/* ---------- 主题：暗色（默认） ---------- */
:root {
  --bg: #07090c;
  --bg-alt: #0a0d12;
  --surface: #0d1117;
  --surface-2: #111722;
  --text: #e6edf3;
  --text-soft: #97a3b0;
  --text-faint: #5c6774;
  --border: rgba(255, 255, 255, 0.09);
  --border-strong: rgba(255, 255, 255, 0.18);
  --grid: rgba(255, 255, 255, 0.035);
  --accent: #3ddbd9;
  --accent-2: #5b8cff;
  --accent-3: #a06bff;
  --accent-dim: rgba(61, 219, 217, 0.14);
  --accent-line: rgba(61, 219, 217, 0.5);
  --nav-bg: rgba(7, 9, 12, 0.72);
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.55);
  --glow-1: rgba(61, 219, 217, 0.16);
  --glow-2: rgba(91, 140, 255, 0.14);
  --glow-3: rgba(160, 107, 255, 0.12);
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ---------- 主题：亮色 ---------- */
:root[data-theme="light"] {
  --bg: #f4f6f9;
  --bg-alt: #eceff4;
  --surface: #ffffff;
  --surface-2: #f7f9fc;
  --text: #0e1319;
  --text-soft: #59636f;
  --text-faint: #8b95a1;
  --border: rgba(14, 19, 25, 0.1);
  --border-strong: rgba(14, 19, 25, 0.22);
  --grid: rgba(14, 19, 25, 0.04);
  --accent: #0d9b98;
  --accent-2: #2f6bf0;
  --accent-3: #7a45e0;
  --accent-dim: rgba(13, 155, 152, 0.12);
  --accent-line: rgba(13, 155, 152, 0.55);
  --nav-bg: rgba(244, 246, 249, 0.75);
  --shadow: 0 18px 50px rgba(14, 19, 25, 0.1);
  --glow-1: rgba(13, 155, 152, 0.18);
  --glow-2: rgba(47, 107, 240, 0.14);
  --glow-3: rgba(122, 69, 224, 0.12);
}

/* =========================================================
   基础
   ========================================================= */
*, *::before, *::after { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "DM Sans", -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Roboto, sans-serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  transition: background-color 0.5s ease, color 0.5s ease;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
ul, ol, dl, dd { margin: 0; padding: 0; list-style: none; }
::selection { background: var(--accent); color: #07090c; }

:root[data-theme="light"] ::selection { color: #fff; }

.wrap { width: 100%; max-width: 1080px; margin: 0 auto; padding: 0 24px; }

.mono, .eyebrow, .card__idx, .card__cat, .timeline__time, .stat__label,
.timeline__tag, .skills__dot + *, .brand__text {
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

/* =========================================================
   背景层
   ========================================================= */
.bg-grid {
  position: fixed; inset: 0; z-index: -2; pointer-events: none;
  background-image:
    linear-gradient(to right, var(--grid) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(ellipse 100% 70% at 50% 0%, #000 10%, transparent 78%);
          mask-image: radial-gradient(ellipse 100% 70% at 50% 0%, #000 10%, transparent 78%);
}

.bg-glow {
  position: fixed; inset: -10%; z-index: -1; pointer-events: none;
  background:
    radial-gradient(560px circle at 12% 8%, var(--glow-1), transparent 62%),
    radial-gradient(680px circle at 88% 16%, var(--glow-2), transparent 62%),
    radial-gradient(640px circle at 50% 108%, var(--glow-3), transparent 62%);
  animation: drift 22s var(--ease) infinite alternate;
}

@keyframes drift {
  from { transform: translate3d(0, 0, 0) scale(1); }
  to   { transform: translate3d(-2%, 2%, 0) scale(1.06); }
}

/* =========================================================
   导航
   ========================================================= */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  background: var(--nav-bg);
  backdrop-filter: saturate(160%) blur(16px);
  -webkit-backdrop-filter: saturate(160%) blur(16px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, background-color 0.5s ease;
  animation: riseIn 0.5s var(--ease) both;
}
.nav.is-scrolled { border-bottom-color: var(--border); }

.nav__inner {
  height: 60px; display: flex; align-items: center; justify-content: space-between; gap: 20px;
}

.brand { display: inline-flex; align-items: center; gap: 10px; }
.brand__mark {
  width: 28px; height: 28px; display: grid; place-items: center;
  border: 1px solid var(--accent-line); color: var(--accent);
  font-weight: 700; font-size: 14px; border-radius: 6px;
  box-shadow: 0 0 0 3px var(--accent-dim);
}
.brand__text { font-size: 13px; letter-spacing: 0.14em; font-weight: 500; }
.brand__slash { color: var(--accent); margin: 0 2px; }

.nav__links { display: flex; gap: 2px; }
.nav__link {
  position: relative; padding: 7px 14px; font-size: 14px;
  color: var(--text-soft); border-radius: 7px;
  transition: color 0.2s ease, background-color 0.2s ease;
}
.nav__link::after {
  content: ""; position: absolute; left: 14px; right: 14px; bottom: 3px;
  height: 1px; background: var(--accent); transform: scaleX(0);
  transform-origin: left center; transition: transform 0.3s var(--ease);
}
.nav__link:hover { color: var(--text); }
.nav__link:hover::after, .nav__link.is-active::after { transform: scaleX(1); }
.nav__link.is-active { color: var(--text); }

.nav__right { display: flex; align-items: center; gap: 14px; }

.status { display: inline-flex; align-items: center; gap: 7px; font-size: 12px; color: var(--text-soft); }
.status__dot {
  width: 7px; height: 7px; border-radius: 50%; background: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
  animation: pulse 2.2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.45; transform: scale(0.82); }
}

.icon-btn {
  width: 34px; height: 34px; display: grid; place-items: center;
  border: 1px solid var(--border); border-radius: 8px;
  background: transparent; color: var(--text-soft); cursor: pointer;
  transition: color 0.2s ease, border-color 0.2s ease;
}
.icon-btn:hover { color: var(--text); border-color: var(--border-strong); }
.icon-btn svg { width: 17px; height: 17px; animation: iconIn 0.4s var(--ease); }
.i-moon { display: none; }
:root[data-theme="dark"] .i-sun { display: none; }
:root[data-theme="dark"] .i-moon { display: block; }

/* =========================================================
   Hero
   ========================================================= */
.hero {
  position: relative; min-height: 100vh;
  display: flex; align-items: center; padding: 140px 0 100px;
}
.hero__inner { position: relative; }

.eyebrow {
  margin: 0 0 22px; font-size: 12px; letter-spacing: 0.24em;
  color: var(--accent); text-transform: uppercase;
}

.hero__title {
  margin: 0; font-size: clamp(72px, 16vw, 168px); line-height: 0.92;
  font-weight: 700; letter-spacing: -0.04em;
}
.hero__title-accent { color: var(--accent); }

.hero__role {
  margin: 22px 0 0;
  font-size: clamp(18px, 2.6vw, 26px); font-weight: 500; letter-spacing: -0.01em;
}
.hero__role-fixed { color: var(--text); }

.hero__desc {
  margin: 24px 0 0; max-width: 560px;
  font-size: 17px; color: var(--text-soft);
}

.hero__actions { margin-top: 40px; display: flex; gap: 14px; flex-wrap: wrap; }

/* ---- 统计 ---- */
.stats {
  margin-top: 76px; display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 1px; background: var(--border); border: 1px solid var(--border);
}
.stat { background: var(--bg); padding: 22px 22px; transition: background-color 0.3s ease; }
.stat:hover { background: var(--surface-2); }
.stat__num {
  font-size: 40px; font-weight: 700; letter-spacing: -0.03em; line-height: 1.1;
  font-family: "JetBrains Mono", ui-monospace, monospace; color: var(--text);
}
.stat__num--suffix { color: var(--accent); }
.stat__num--sm { font-size: 28px; }
.stat__label {
  margin-bottom: 6px; font-size: 11px; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--text-faint);
}

.scroll-cue {
  position: absolute; left: 50%; bottom: 30px; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  font-size: 10px; letter-spacing: 0.24em; color: var(--text-faint);
}
.scroll-cue__line {
  width: 1px; height: 40px; background: linear-gradient(var(--accent), transparent);
  position: relative; overflow: hidden;
}
.scroll-cue__line::after {
  content: ""; position: absolute; inset: 0; background: var(--accent);
  animation: cueRun 1.9s var(--ease) infinite;
}
@keyframes cueRun { from { transform: translateY(-100%); } to { transform: translateY(100%); } }

/* =========================================================
   按钮（含高光扫过）
   ========================================================= */
.btn {
  position: relative; display: inline-flex; align-items: center; justify-content: center;
  height: 46px; padding: 0 26px; font-size: 14px; font-weight: 500;
  border: 1px solid transparent; cursor: pointer; overflow: hidden; top: 0;
  transition: top 0.25s var(--ease), background-color 0.25s ease,
    border-color 0.25s ease, color 0.25s ease, box-shadow 0.25s ease;
}
.btn--primary { background: var(--accent); color: #06181a; box-shadow: 0 8px 26px rgba(61, 219, 217, 0.18); }
:root[data-theme="light"] .btn--primary { color: #fff; }
.btn--primary span { position: relative; z-index: 2; }
.btn--primary::after {
  content: ""; position: absolute; top: 0; bottom: 0; left: -80%; width: 45%;
  background: linear-gradient(100deg, transparent, rgba(255, 255, 255, 0.5), transparent);
  transform: skewX(-18deg); transition: left 0.6s var(--ease); z-index: 1;
}
.btn--primary:hover { top: -2px; box-shadow: 0 12px 32px rgba(61, 219, 217, 0.28); }
.btn--primary:hover::after { left: 130%; }

.btn--ghost { background: transparent; color: var(--text); border-color: var(--border-strong); }
.btn--ghost:hover { border-color: var(--accent); color: var(--accent); top: -2px; }

/* =========================================================
   Section 通用
   ========================================================= */
.section { padding: 120px 0; }
.section--alt { background: var(--bg-alt); transition: background-color 0.5s ease; }
.section__head { margin-bottom: 60px; }
.section__title {
  margin: 0; max-width: 800px; font-size: clamp(30px, 4.6vw, 50px);
  line-height: 1.08; font-weight: 600; letter-spacing: -0.03em;
}

/* =========================================================
   关于 / 个人信息
   ========================================================= */
.about { display: grid; grid-template-columns: 340px 1fr; gap: 56px; align-items: start; }

.profile__card {
  border: 1px solid var(--border); background: var(--surface);
  padding: 26px; text-align: center; position: relative; overflow: hidden;
}
.profile__card::before {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent-line), transparent);
}
.profile__avatar {
  width: 84px; height: 84px; margin: 6px auto 16px; display: grid; place-items: center;
  border-radius: 50%; font-weight: 700; font-size: 24px; letter-spacing: -0.02em;
  color: var(--accent); background: var(--accent-dim);
  border: 1px solid var(--accent-line);
}
.profile__name { margin: 0; font-size: 20px; font-weight: 600; }
.profile__handle { margin: 4px 0 16px; font-size: 13px; color: var(--text-faint); font-family: "JetBrains Mono", monospace; }

.chip {
  position: relative; top: 0; display: inline-flex; align-items: center; gap: 6px;
  font-size: 12px; padding: 5px 12px; border: 1px solid var(--border-strong);
  border-radius: 999px; color: var(--text-soft);
  transition: color 0.2s ease, border-color 0.2s ease, top 0.2s ease;
}
.chip:hover { color: var(--accent); border-color: var(--accent-line); top: -2px; }
.chip--live { color: var(--accent); border-color: var(--accent-line); }

.profile__info { margin-top: 16px; border: 1px solid var(--border); background: var(--surface); }
.profile__info li {
  display: flex; justify-content: space-between; gap: 14px;
  padding: 13px 18px; font-size: 13px; border-bottom: 1px solid var(--border);
}
.profile__info li:last-child { border-bottom: 0; }
.profile__info span { color: var(--text-faint); }
.profile__info b { font-weight: 500; text-align: right; }

.about__body { padding-top: 4px; }
.about__p { margin: 0 0 20px; font-size: 16.5px; color: var(--text-soft); }
.about__p:last-of-type { margin-bottom: 0; }
.about__chips { margin-top: 32px; display: flex; flex-wrap: wrap; gap: 10px; }

/* =========================================================
   项目卡片
   ========================================================= */
.projects { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }

.card {
  position: relative; top: 0; border: 1px solid var(--border); background: var(--surface);
  padding: 28px; overflow: hidden;
  transition: top 0.4s var(--ease), border-color 0.4s ease, background-color 0.4s ease;
}
.card::before {
  content: ""; position: absolute; inset: 0; z-index: 0; opacity: 0;
  background: radial-gradient(420px circle at var(--mx, 50%) var(--my, 0%), var(--accent-dim), transparent 60%);
  transition: opacity 0.4s ease;
}
.card:hover { top: -6px; border-color: var(--border-strong); }
.card:hover::before { opacity: 1; }
.card > * { position: relative; z-index: 1; }

.card__head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 18px; }
.card__idx { font-size: 13px; font-weight: 500; color: var(--accent); letter-spacing: 0.06em; }
.card__cat { font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--text-faint); }

.card__title { margin: 0 0 12px; font-size: 20px; font-weight: 600; letter-spacing: -0.015em; }
.card__desc { margin: 0 0 20px; font-size: 14.5px; color: var(--text-soft); }

.tags { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  font-size: 12px; padding: 4px 11px; color: var(--text-soft);
  background: var(--surface-2); border: 1px solid var(--border);
  font-family: "JetBrains Mono", monospace;
}

/* =========================================================
   演示视频（Bilibili）
   ========================================================= */
.videos { margin-top: 56px; }
.videos__head {
  display: flex; align-items: baseline; justify-content: space-between;
  gap: 16px; flex-wrap: wrap; margin-bottom: 20px;
}
.videos__title { display: flex; align-items: center; gap: 10px; margin: 0; font-size: 19px; font-weight: 600; }
.videos__dot { width: 7px; height: 7px; background: var(--accent); box-shadow: 0 0 0 3px var(--accent-dim); }
.videos__note { font-size: 13px; color: var(--text-faint); }

.video-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(290px, 1fr)); gap: 20px; }

.video {
  position: relative; top: 0; overflow: hidden;
  border: 1px solid var(--border); background: var(--surface);
  transition: border-color 0.35s ease, top 0.35s var(--ease);
}
.video:hover { border-color: var(--border-strong); top: -4px; }

.video__thumb {
  position: relative; display: block; width: 100%; aspect-ratio: 16 / 9;
  border: 0; padding: 0; cursor: pointer; overflow: hidden;
  background:
    radial-gradient(120% 120% at 20% 10%, rgba(61, 219, 217, 0.22), transparent 55%),
    radial-gradient(120% 120% at 90% 90%, rgba(160, 107, 255, 0.22), transparent 55%),
    #0b0f14;
}
.video__thumb::after {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(to right, rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 28px 28px;
}
.video__play {
  position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%);
  width: 64px; height: 64px; border-radius: 50%; z-index: 2;
  background: rgba(255, 255, 255, 0.12); border: 1px solid rgba(255, 255, 255, 0.5);
  -webkit-backdrop-filter: blur(4px); backdrop-filter: blur(4px);
  transition: transform 0.3s var(--ease), background-color 0.3s ease;
}
.video__play::before {
  content: ""; position: absolute; left: 54%; top: 50%; transform: translate(-50%, -50%);
  border-style: solid; border-width: 11px 0 11px 18px;
  border-color: transparent transparent transparent #fff;
}
.video__thumb:hover .video__play { transform: translate(-50%, -50%) scale(1.1); background: rgba(255, 255, 255, 0.22); }

.video__badge {
  position: absolute; left: 14px; top: 14px; z-index: 2; border-radius: 4px;
  font-size: 11px; letter-spacing: 0.08em; padding: 3px 10px;
  background: rgba(255, 255, 255, 0.14); border: 1px solid rgba(255, 255, 255, 0.28);
  color: #fff; font-family: "JetBrains Mono", monospace;
}
.video__meta { padding: 16px 18px; }
.video__name { margin: 0 0 4px; font-size: 16px; font-weight: 600; }
.video__hint { margin: 0; font-size: 13px; color: var(--text-faint); }
.video__link {
  display: inline-block; margin-top: 10px; font-size: 13px; color: var(--accent);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}
.video__link:hover { border-bottom-color: var(--accent); }

.video__frame {
  display: block; width: 100%; aspect-ratio: 16 / 9; border: 0; background: #000;
}

/* =========================================================
   时间线
   ========================================================= */
.timeline { position: relative; padding-left: 4px; }
.timeline::before {
  content: ""; position: absolute; left: 7px; top: 8px; bottom: 8px; width: 1px;
  background: linear-gradient(var(--accent-line), var(--border), transparent);
  transform-origin: top; animation: lineGrow 1s var(--ease) both;
}
@keyframes lineGrow { from { transform: scaleY(0); } to { transform: scaleY(1); } }

.timeline__item { position: relative; padding: 0 0 44px 44px; }
.timeline__item:last-child { padding-bottom: 0; }
.timeline__node {
  position: absolute; left: 0; top: 5px; width: 15px; height: 15px;
  border: 1px solid var(--accent-line); background: var(--bg); border-radius: 50%;
  box-shadow: 0 0 0 4px var(--accent-dim);
}
.timeline__meta { display: flex; align-items: center; gap: 12px; margin-bottom: 8px; }
.timeline__time { font-size: 13px; font-weight: 500; color: var(--accent); letter-spacing: 0.06em; }
.timeline__tag {
  font-size: 11px; letter-spacing: 0.1em; color: var(--text-faint);
  border: 1px solid var(--border); padding: 2px 9px;
}
.timeline__head { margin: 0 0 8px; font-size: 21px; font-weight: 600; letter-spacing: -0.015em; }
.timeline__desc { margin: 0; max-width: 680px; font-size: 15.5px; color: var(--text-soft); }

/* =========================================================
   技能
   ========================================================= */
.skills { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.skills__col {
  position: relative; top: 0; border: 1px solid var(--border); background: var(--surface); padding: 26px;
  transition: top 0.35s var(--ease), border-color 0.35s ease;
}
.skills__col:hover { top: -4px; border-color: var(--border-strong); }
.skills__head {
  display: flex; align-items: center; gap: 10px; margin: 0 0 18px;
  font-size: 15px; font-weight: 600;
}
.skills__dot { width: 7px; height: 7px; background: var(--accent); box-shadow: 0 0 0 3px var(--accent-dim); }
.skills__list li {
  position: relative; padding: 7px 0 7px 18px; font-size: 15px; color: var(--text-soft);
  border-bottom: 1px dashed var(--border);
}
.skills__list li:last-child { border-bottom: 0; }
.skills__list li::before {
  content: ""; position: absolute; left: 2px; top: 15px;
  width: 6px; height: 1px; background: var(--accent);
}

/* =========================================================
   正在折腾（研究兴趣）
   ========================================================= */
.now { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.now__item {
  position: relative; border: 1px solid var(--border); background: var(--surface);
  padding: 30px; overflow: hidden; top: 0;
  transition: top 0.4s var(--ease), border-color 0.4s ease;
}
.now__item::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 2px;
  background: linear-gradient(var(--accent), transparent);
  transform: scaleY(0); transform-origin: top; transition: transform 0.5s var(--ease);
}
.now__item:hover { top: -5px; border-color: var(--border-strong); }
.now__item:hover::before { transform: scaleY(1); }
.now__tag {
  display: inline-block; margin-bottom: 14px; font-size: 11px; letter-spacing: 0.16em;
  color: var(--accent); border: 1px solid var(--accent-line); padding: 3px 10px;
  font-family: "JetBrains Mono", monospace;
}
.now__title { margin: 0 0 12px; font-size: 20px; font-weight: 600; letter-spacing: -0.015em; }
.now__desc { margin: 0 0 18px; font-size: 15px; color: var(--text-soft); }
.now__list li {
  position: relative; padding: 6px 0 6px 22px; font-size: 14px; color: var(--text-soft);
}
.now__list li::before {
  content: "▹"; position: absolute; left: 0; top: 6px; color: var(--accent); font-size: 12px;
}

/* =========================================================
   竞赛荣誉
   ========================================================= */
.awards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--border); border: 1px solid var(--border); }
.awards__item {
  display: flex; align-items: center; gap: 16px; background: var(--bg);
  padding: 20px 22px; transition: background-color 0.3s ease;
}
.awards__item:hover { background: var(--surface-2); }
.awards__year {
  flex-shrink: 0; font-size: 13px; font-weight: 500; color: var(--accent);
  font-family: "JetBrains Mono", monospace; letter-spacing: 0.04em; min-width: 40px;
}
.awards__item b { flex: 1; font-size: 15px; font-weight: 500; }
.awards__sub { flex-shrink: 0; font-size: 12px; color: var(--text-faint); }

/* =========================================================
   联系 / 页脚
   ========================================================= */
.contact { text-align: center; padding: 150px 0; }
.contact__title {
  margin: 0 auto 14px; max-width: 720px; font-size: clamp(28px, 4.6vw, 46px);
  font-weight: 600; letter-spacing: -0.03em;
}
.contact__desc { margin: 0 auto 34px; max-width: 520px; font-size: 17px; color: var(--text-soft); }
.contact__actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.contact__mail {
  margin: 24px 0 0; font-size: 14px; font-family: "JetBrains Mono", monospace;
  letter-spacing: 0.02em;
}
.contact__mail a { color: var(--text-soft); border-bottom: 1px solid var(--border-strong); padding-bottom: 2px; transition: color 0.2s ease, border-color 0.2s ease; }
.contact__mail a:hover { color: var(--accent); border-color: var(--accent); }

.footer { border-top: 1px solid var(--border); padding: 26px 0; transition: border-color 0.5s ease; }
.footer__inner {
  display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap;
  font-size: 12.5px; color: var(--text-faint);
}
.footer__meta { font-family: "JetBrains Mono", monospace; letter-spacing: 0.02em; }

/* =========================================================
   入场 / 滚动动画
   ========================================================= */
@keyframes riseIn {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Hero 首屏：按 --i 依次浮现（backwards：动画结束后回归自身样式、不留 transform，避免文字发虚） */
.rise { animation: riseIn 0.6s var(--ease) backwards; animation-delay: calc(var(--i, 0) * 0.09s); }

/* 滚动进入视口才播放 */
.reveal {
  opacity: 0; transform: translateY(22px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
/* 结束后 transform 归零为 none：不残留合成层，文字保持清晰 */
.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}

/* =========================================================
   响应式
   ========================================================= */
@media (max-width: 940px) {
  .about { grid-template-columns: 1fr; gap: 40px; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .projects { grid-template-columns: 1fr; }
  .skills { grid-template-columns: 1fr; }
  .now { grid-template-columns: 1fr; }
  .awards { grid-template-columns: 1fr; }
  .video-grid { grid-template-columns: 1fr; }
  .section { padding: 90px 0; }
}

@media (max-width: 640px) {
  .nav__links { display: none; }
  .status__text { display: none; }
  .hero { min-height: auto; padding: 130px 0 90px; }
  .scroll-cue { display: none; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .section__head { margin-bottom: 44px; }
  .footer__inner { flex-direction: column; text-align: center; }
}