/* ============================================================
   个人网站样式 —— 纯静态、响应式、深浅色自适应、可交互
   设计：现代极简（参考 Linear / Vercel / alanhou.net 交互思路）
   修改点：调整 :root 变量即可换肤（主色、圆角、间距）
   ============================================================ */

:root {
  /* 固定深色主题（移除亮色切换，默认深色） */
  --bg: #0e0f13;
  --bg-soft: #16181d;
  --text: #f2f3f5;
  --text-soft: #a0a3ab;
  --border: #26282f;
  --accent: #818cf8;        /* 主色：靛蓝（深色） */
  --accent-soft: #1e2030;
  --radius: 14px;
  --maxw: 880px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
          "Microsoft YaHei", "Hiragino Sans GB", system-ui, sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

code {
  background: var(--accent-soft);
  color: var(--accent);
  padding: 1px 6px;
  border-radius: 6px;
  font-size: .9em;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}

/* ---------- 阅读进度条 ---------- */
.progress {
  position: fixed; top: 0; left: 0;
  height: 3px; width: 0;
  background: var(--accent);
  z-index: 50;
  transition: width .1s linear;
}

/* ---------- 导航 ---------- */
.nav {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center;
  padding: 12px 24px;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav__brand { font-weight: 800; letter-spacing: .5px; color: var(--text); text-decoration: none; }
.nav__links { margin-left: auto; display: flex; flex-wrap: wrap; }
.nav__links a {
  color: var(--text-soft); text-decoration: none;
  margin-left: 20px; font-size: 14px; transition: color .2s;
}
.nav__links a:hover { color: var(--accent); }
.lang-toggle {
  margin-left: 16px;
  display: flex; align-items: center;
  border: 1px solid var(--border);
  border-radius: 999px; overflow: hidden;
  font-size: 13px;
}
.lang-toggle button {
  background: none; border: none; cursor: pointer;
  color: var(--text-soft); padding: 7px 13px;
  font-size: 13px; transition: color .2s, background .2s;
  font-family: var(--font);
}
.lang-toggle button.is-active {
  color: #fff; background: var(--accent);
}
.lang-toggle button:hover { color: var(--accent); }
.lang-toggle button.is-active:hover { color: #fff; }

@media (max-width: 560px) {
  .lang-toggle { margin-left: 10px; }
  .lang-toggle button { padding: 6px 10px; }
}

/* ---------- 布局容器 ---------- */
main { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.section { padding: 72px 0; border-bottom: 1px solid var(--border); }
.section__title {
  font-size: 22px; margin-bottom: 20px;
  position: relative; padding-left: 14px;
}
.section__title::before {
  content: ""; position: absolute; left: 0; top: 4px; bottom: 4px;
  width: 4px; border-radius: 4px; background: var(--accent);
}
.section__lead { color: var(--text-soft); font-size: 17px; max-width: 640px; }

/* ---------- Hero ---------- */
.hero { padding: 96px 0 72px; text-align: center; }
.hero__eyebrow { color: var(--accent); font-weight: 600; margin-bottom: 8px; }
.hero__name { font-size: 56px; font-weight: 800; letter-spacing: -1px; }
.hero__title { font-size: 20px; color: var(--text-soft); margin-top: 6px; }
.hero__tagline { max-width: 560px; margin: 18px auto 28px; color: var(--text-soft); font-size: 17px; }
.hero__actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.hero__social { margin-top: 28px; display: flex; gap: 18px; justify-content: center; }
.hero__social a { color: var(--text-soft); text-decoration: none; font-size: 14px; }
.hero__social a:hover { color: var(--accent); }
.scroll-hint { margin-top: 26px; color: var(--text-soft); font-size: 13px; }

.hero__avatar {
  display: flex; justify-content: center;
  margin-bottom: 20px;
}
.hero__avatar-img {
  width: 120px; height: 120px; border-radius: 50%;
  object-fit: cover; object-position: top center;
  border: 3px solid var(--accent);
  box-shadow: 0 0 0 6px color-mix(in srgb, var(--accent) 18%, transparent),
              0 18px 40px color-mix(in srgb, var(--accent) 22%, transparent);
  transition: transform .3s cubic-bezier(0.32, 0.72, 0, 1), box-shadow .3s;
}
.hero__avatar-img:hover {
  transform: scale(1.05);
  box-shadow: 0 0 0 8px color-mix(in srgb, var(--accent) 24%, transparent),
              0 22px 50px color-mix(in srgb, var(--accent) 30%, transparent);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-block; padding: 11px 22px;
  border-radius: 999px; font-size: 15px; font-weight: 600;
  text-decoration: none; transition: transform .15s, opacity .15s;
}
.btn:hover { transform: translateY(-1px); }
.btn--primary { background: var(--accent); color: #fff; }
.btn--ghost { border: 1px solid var(--border); color: var(--text); }

/* ---------- 工作经历：公司子板块 ---------- */
.company-block {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  background: var(--bg);
}
.company-head { margin-bottom: 4px; }
.company-role { font-size: 20px; margin-top: 4px; }

/* 视角切换器 */
.view-switch { display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0 6px; }
.view-btn {
  background: var(--bg-soft); border: 1px solid var(--border);
  color: var(--text-soft); padding: 7px 14px;
  border-radius: 999px; font-size: 14px; cursor: pointer; transition: .15s;
}
.view-btn:hover { color: var(--accent); }
.view-btn.is-active { background: var(--accent); color: #fff; border-color: var(--accent); }
.view-hint { color: var(--text-soft); font-size: 13px; margin-bottom: 12px; }

/* 项目卡片 + 多视角 + 深耕 */
.projects { display: flex; flex-direction: column; }
.project-card {
  background: var(--bg-soft); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 16px 18px; margin-bottom: 14px;
}
.project-card__head { display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.project-card__title { font-size: 17px; }
.view-pane { margin-top: 12px; color: var(--text-soft); font-size: 15px; }
.view-pane strong { color: var(--text); }
.view-pane em { color: var(--accent); font-style: normal; font-weight: 600; }
/* 深耕展开：Apple 风格 0.5s 平滑（grid 0fr → 1fr） */
.js .project-detail,
.js .layer-detail {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows .5s cubic-bezier(0.32, 0.72, 0, 1);
}
.js .project-detail.is-open,
.js .layer-detail.is-open { grid-template-rows: 1fr; }

.detail-inner {
  overflow: hidden;
  min-height: 0;
  padding-top: 12px;
  margin-top: 12px;
  border-top: 1px dashed var(--border);
  color: var(--text-soft); font-size: 14px;
}
.detail-inner h5 { color: var(--text); font-size: 14px; margin-bottom: 4px; }
.detail-inner ul { margin: 8px 0 0 18px; }
.detail-inner li { margin-bottom: 4px; }

/* 通用展开按钮 */
.expand-btn {
  background: none; border: 1px solid var(--border);
  color: var(--text-soft); border-radius: 999px;
  padding: 5px 12px; font-size: 13px; cursor: pointer;
  white-space: nowrap; transition: .15s;
}
.expand-btn:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- 经历时间线 ---------- */
.timeline { list-style: none; display: flex; flex-direction: column; gap: 28px; }
.timeline__item { border-left: 2px solid var(--border); padding-left: 20px; position: relative; }
.timeline__item::before {
  content: ""; position: absolute; left: -6px; top: 4px;
  width: 10px; height: 10px; border-radius: 50%; background: var(--accent);
}
.timeline__meta { display: flex; gap: 12px; flex-wrap: wrap; color: var(--text-soft); font-size: 14px; }
.timeline__org { font-weight: 600; color: var(--text); }
.org-link {
  color: var(--text);
  text-decoration: underline;
  text-decoration-color: var(--accent);
  text-underline-offset: 3px;
  transition: color .2s, text-decoration-color .2s;
}
.org-link:hover {
  color: var(--accent);
  text-decoration-color: var(--accent);
}
.timeline__role { font-size: 18px; margin: 6px 0 4px; }
.timeline__desc { color: var(--text-soft); }

/* ---------- AI Agent 架构 ---------- */
.block-subtitle { font-size: 16px; font-weight: 700; margin: 22px 0 10px; }
.agent-arch { display: flex; flex-direction: column; align-items: center; gap: 0; margin: 8px 0; }
.arch-layer {
  width: 100%; max-width: 540px;
  border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--bg-soft); padding: 14px 18px;
}
.arch-layer__head { display: flex; align-items: center; gap: 12px; }
.arch-layer__name { font-weight: 700; font-size: 17px; }
.arch-layer__tag { color: var(--accent); font-size: 13px; font-weight: 600; margin-left: 2px; }
.arch-layer .expand-btn { margin-left: auto; }
/* （layer-detail 样式统一由 .detail-inner 提供，见上方深耕展开规则） */
.arch-connector { color: var(--text-soft); font-size: 18px; line-height: 1.2; padding: 2px 0; }
.agent-flow {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  margin-top: 16px; color: var(--text-soft); font-size: 15px;
}
.agent-flow .arrow { color: var(--accent); font-weight: 700; }

/* ---------- 作品网格 ---------- */
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 18px; }
.card {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  transition: transform .15s, border-color .15s;
}
.card:hover { transform: translateY(-3px); border-color: var(--accent); }
.card__title { font-size: 17px; margin-bottom: 8px; }
.card__desc { color: var(--text-soft); font-size: 14px; margin-bottom: 14px; }
.card__link { color: var(--accent); text-decoration: none; font-size: 14px; font-weight: 600; }

/* ---------- 技能标签 ---------- */
.tags { display: flex; flex-wrap: wrap; gap: 10px; }
.tag {
  background: var(--accent-soft);
  color: var(--accent);
  padding: 7px 14px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
}

/* ---------- 联系方式列表 ---------- */
.contact-list { list-style: none; display: flex; flex-direction: column; gap: 10px; margin-bottom: 22px; }
.contact-list li { color: var(--text-soft); font-size: 16px; }
.contact-list li span { display: inline-block; width: 46px; color: var(--accent); font-weight: 600; }
.contact-list a { color: var(--text); text-decoration: none; }
.contact-list a:hover { color: var(--accent); }

/* 联系我：两栏（左内容 / 右生活照） */
.contact-wrap {
  max-width: 1040px; margin: 0 auto;
  display: grid; grid-template-columns: minmax(0, 1fr) 320px;
  gap: 48px; align-items: center;
}
.contact-main { min-width: 0; }
.contact-summary { font-size: 17px; line-height: 1.85; text-align: left; }
.contact-summary b { color: var(--accent); }
.contact-strengths {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin: 26px 0 30px;
}
.strength-card {
  background: var(--bg-soft); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 18px;
  transition: transform .25s cubic-bezier(0.32, 0.72, 0, 1), border-color .25s;
}
.strength-card:hover { transform: translateY(-3px); border-color: color-mix(in srgb, var(--accent) 45%, var(--border)); }
.strength-card__tag {
  display: inline-block; font-size: 13px; font-weight: 700; color: var(--accent);
  background: var(--accent-soft); padding: 4px 12px; border-radius: 999px; margin-bottom: 12px;
}
.strength-card p { margin: 0; font-size: 14px; color: var(--text-soft); line-height: 1.65; }
.contact-welcome { margin: 4px 0 30px; }
.contact-welcome__lead { font-size: 15px; color: var(--text); font-weight: 600; margin: 0 0 14px; }
.welcome-tags { display: flex; flex-wrap: wrap; gap: 10px; }
.welcome-tag {
  font-size: 14px; color: var(--text-soft);
  border: 1px solid var(--border); border-radius: 999px;
  padding: 7px 16px; cursor: default;
  transition: color .2s, border-color .2s, background .2s;
}
.welcome-tag:hover {
  color: #fff; background: var(--accent); border-color: var(--accent);
}

/* 联系我右侧生活照 */
.contact-photo { margin: 0; text-align: center; }
.contact-photo__img {
  width: 100%; aspect-ratio: 3 / 4;
  object-fit: cover; object-position: center 18%;
  border-radius: 20px;
  border: 1px solid var(--border);
  box-shadow: 0 20px 52px color-mix(in srgb, var(--accent) 14%, var(--shadow));
  transition: transform .35s cubic-bezier(0.32, 0.72, 0, 1), box-shadow .35s;
}
.contact-photo__img:hover {
  transform: translateY(-4px);
  box-shadow: 0 28px 64px color-mix(in srgb, var(--accent) 20%, var(--shadow));
}
.contact-photo__cap {
  margin-top: 14px; color: var(--text-soft); font-size: 13.5px; letter-spacing: 1px;
}

@media (max-width: 820px) {
  .contact-wrap { grid-template-columns: 1fr; gap: 32px; }
  .contact-photo { max-width: 300px; margin: 0 auto; }
}
@media (max-width: 680px) {
  .contact-strengths { grid-template-columns: 1fr; }
  .hero__avatar-img { width: 96px; height: 96px; }
}

/* ---------- 页脚 ---------- */
.footer { text-align: center; padding: 32px 24px; color: var(--text-soft); font-size: 13px; }

/* ============================================================
   关于我：星球探索 + 能力雷达 + AI 摘要
   ============================================================ */
.explore {
  display: flex; flex-direction: column; align-items: center;
  padding: 24px 0 8px;
  transition: opacity .5s ease, transform .5s cubic-bezier(0.32, 0.72, 0, 1);
}
.explore.is-leaving { opacity: 0; transform: scale(.9); pointer-events: none; }

.planet-stage {
  position: relative; width: 280px; height: 280px;
  display: flex; align-items: center; justify-content: center;
}
.planet {
  position: absolute; width: 184px; height: 184px; border-radius: 50%;
  background: radial-gradient(circle at 32% 28%, #a5b4fc 0%, #6366f1 38%, #4338ca 75%, #312e81 100%);
  box-shadow: 0 0 60px rgba(99, 102, 241, .45), inset -18px -22px 42px rgba(0, 0, 0, .35);
  animation: planetSpin 22s linear infinite;
}
.planet::before {
  content: ""; position: absolute; inset: -30px; border-radius: 50%;
  border: 1px solid color-mix(in srgb, var(--accent) 38%, transparent);
  transform: rotateX(74deg); opacity: .45;
}
.planet::after {
  content: ""; position: absolute; inset: -52px; border-radius: 50%;
  border: 1px solid color-mix(in srgb, var(--accent) 22%, transparent);
  transform: rotateX(74deg) rotate(28deg); opacity: .3;
}
@keyframes planetSpin { to { transform: rotate(360deg); } }

.explore-core {
  position: relative; z-index: 2;
  width: 96px; height: 96px; border-radius: 50%;
  border: 1px solid color-mix(in srgb, var(--accent) 50%, transparent);
  background: color-mix(in srgb, var(--bg) 68%, transparent);
  backdrop-filter: blur(6px);
  color: var(--text); font-weight: 700; font-size: 15px; cursor: pointer;
  display: flex; align-items: center; justify-content: center; text-align: center;
  transition: transform .25s cubic-bezier(0.32, 0.72, 0, 1), box-shadow .25s;
}
.explore-core:hover { transform: scale(1.08); box-shadow: 0 0 0 8px var(--accent-soft); }
.explore-core__pulse {
  position: absolute; inset: 0; border-radius: 50%;
  border: 2px solid var(--accent);
  animation: pulseRing 2.2s ease-out infinite;
}
@keyframes pulseRing {
  0% { transform: scale(1); opacity: .7; }
  100% { transform: scale(1.9); opacity: 0; }
}
.explore-hint { margin-top: 22px; color: var(--text-soft); font-size: 14px; }

/* 雷达容器（默认隐藏，探索后淡入） */
.radar-wrap {
  display: none; flex-direction: column; align-items: center;
  opacity: 0; transform: translateY(18px);
  transition: opacity .5s ease, transform .5s cubic-bezier(0.32, 0.72, 0, 1);
}
.radar-wrap.is-in { display: flex; opacity: 1; transform: none; }
.radar-svg { width: 100%; }
.radar-svg svg { width: 100%; max-width: 420px; height: auto; display: block; margin: 0 auto; }
.radar-grid {
  fill: none;
  stroke: color-mix(in srgb, var(--accent) 45%, var(--text-soft));
  stroke-width: 1;
  opacity: .35;
}
.radar-axis {
  stroke: color-mix(in srgb, var(--accent) 55%, var(--text-soft));
  stroke-width: 1;
  opacity: .45;
}
.radar-label { fill: var(--text-soft); font-size: 12.5px; font-weight: 600; }
.radar-data {
  fill: none;
  stroke: var(--accent);
  stroke-width: 3;
  stroke-linejoin: round;
  filter: drop-shadow(0 0 14px color-mix(in srgb, var(--accent) 90%, transparent));
}
.radar-dot {
  fill: var(--bg);
  stroke: var(--accent);
  stroke-width: 2.5;
  filter: drop-shadow(0 0 8px color-mix(in srgb, var(--accent) 100%, transparent));
}
.radar-poly {
  transform-box: fill-box;
  transform-origin: center;
  transform: scale(0);
  transition: transform .85s cubic-bezier(0.32, 0.72, 0, 1);
}
.radar-poly.is-shown { transform: scale(1); }

.cap-legend { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin-top: 14px; max-width: 540px; }
.cap-legend span {
  font-size: 13px; color: var(--text-soft);
  background: var(--bg-soft); border: 1px solid var(--border);
  padding: 4px 11px; border-radius: 999px;
}
.radar-note { color: var(--text-soft); font-size: 13px; margin-top: 14px; text-align: center; }

/* AI 生成摘要 */
.gen-summary {
  margin-top: 20px; background: var(--accent); color: #fff; border: none;
  padding: 11px 22px; border-radius: 999px; font-size: 15px; font-weight: 600; cursor: pointer;
  transition: transform .15s, opacity .15s;
}
.gen-summary:hover { transform: translateY(-1px); }
.gen-summary:disabled { opacity: .6; cursor: default; transform: none; }
.summary-box {
  margin-top: 16px; max-width: 640px; width: 100%;
  background: var(--bg-soft); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px 20px; text-align: left; font-size: 15px; line-height: 1.75; color: var(--text-soft);
  white-space: pre-wrap; word-break: break-word;
}
.summary-box .cursor {
  display: inline-block; width: 8px; height: 16px; background: var(--accent);
  margin-left: 2px; vertical-align: -2px; animation: blink 1s steps(2, start) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

/* ---------- 滚动淡入 ---------- */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity .6s ease, transform .6s ease; }
.reveal.visible { opacity: 1; transform: none; }

/* ---------- 移动端 ---------- */
@media (max-width: 560px) {
  .hero__name { font-size: 42px; }
  .nav { padding: 10px 16px; }
  .nav__links a { margin-left: 14px; font-size: 13px; }
  .section { padding: 56px 0; }
  .company-block { padding: 16px; }
}

/* ---------- 科研：中心辐射式网络 ---------- */
.research-orbit__header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.research-orbit {
  position: relative;
  max-width: 960px;
  margin: 0 auto;
  min-height: 520px;
  --line: var(--border);
}

.research-orbit__lines {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

.orbit-line {
  stroke: var(--border);
  stroke-width: 1.5;
  stroke-dasharray: 5 5;
  opacity: .75;
}

.orbit-center {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 118px;
  height: 118px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  text-align: center;
  color: #fff;
  font-weight: 800;
  font-size: 16px;
  line-height: 1.25;
  letter-spacing: .5px;
  background: radial-gradient(circle at 35% 30%, #ff7e5f, #f04a2a 60%, #c92a0f);
  box-shadow: 0 18px 50px rgba(240, 74, 42, .28), inset 0 2px 6px rgba(255,255,255,.25);
  z-index: 2;
}

.orbit-node {
  position: absolute;
  width: 270px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: 0 1px 2px rgba(0,0,0,.04), 0 8px 30px rgba(0,0,0,.05);
  z-index: 3;
  transition: transform .35s ease, box-shadow .35s ease, border-color .35s ease;
}
.orbit-node:hover { transform: translateY(-3px); box-shadow: 0 12px 40px rgba(0,0,0,.1); border-color: var(--accent); }

.orbit-node--tl { left: 18px; top: 0; }
.orbit-node--tr { right: 18px; top: 0; }
.orbit-node--ml { left: 0; top: 190px; }
.orbit-node--mr { right: 0; top: 190px; }
.orbit-node--bm { left: 50%; bottom: 0; transform: translateX(-50%); }
.orbit-node--bm:hover { transform: translateX(-50%) translateY(-3px); }

.orbit-node__head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}
.orbit-node__num {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, var(--accent), #8b5cf6);
  flex-shrink: 0;
}
.orbit-node__title { font-size: 16px; font-weight: 650; margin: 0 0 2px; line-height: 1.25; }
.orbit-node__subtitle { font-size: 12px; color: var(--text-soft); margin: 0; }
.orbit-node__desc { font-size: 13.5px; color: var(--text-soft); line-height: 1.6; margin-bottom: 12px; }
.orbit-node__btn {
  appearance: none;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--accent);
  font-size: 13px;
  padding: 6px 12px;
  border-radius: 999px;
  cursor: pointer;
  transition: background .2s ease, border-color .2s ease;
}
.orbit-node__btn:hover { background: var(--accent-soft); border-color: var(--accent); }

.orbit-detail {
  margin-top: 14px;
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows .5s cubic-bezier(0.32, 0.72, 0, 1);
}
.orbit-detail > * {
  overflow: hidden;
}
.orbit-detail.is-open {
  grid-template-rows: 1fr;
}
.orbit-detail p,
.orbit-detail li {
  font-size: 13px;
  color: var(--text-soft);
  line-height: 1.7;
  margin-bottom: 8px;
}
.orbit-detail ul { margin: 0; padding-left: 18px; }
.orbit-detail strong { color: var(--text); }

.orbit-node.is-active {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft), 0 12px 40px rgba(0,0,0,.1);
}

/* 科研：入场动画 */
.research-orbit.is-visible .orbit-node {
  opacity: 0;
  animation: nodeIn .55s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}
.research-orbit.is-visible .orbit-node:nth-child(2) { animation-delay: .05s; }
.research-orbit.is-visible .orbit-node:nth-child(3) { animation-delay: .12s; }
.research-orbit.is-visible .orbit-node:nth-child(4) { animation-delay: .19s; }
.research-orbit.is-visible .orbit-node:nth-child(5) { animation-delay: .26s; }
.research-orbit.is-visible .orbit-node:nth-child(6) { animation-delay: .33s; }

@keyframes nodeIn {
  from { opacity: 0; transform: translateY(18px) scale(.96); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}
.research-orbit.is-visible .orbit-node--bm { animation-name: nodeInBm; }
@keyframes nodeInBm {
  from { opacity: 0; transform: translateX(-50%) translateY(18px) scale(.96); }
  to   { opacity: 1; transform: translateX(-50%) translateY(0) scale(1); }
}

/* 科研：移动端折叠为时间线 */
@media (max-width: 760px) {
  .research-orbit { min-height: auto; }
  .research-orbit__lines, .orbit-center { display: none; }
  .orbit-node {
    position: relative;
    left: auto !important; right: auto !important; top: auto !important; bottom: auto !important;
    transform: none !important;
    width: 100%;
    margin-bottom: 16px;
  }
  .orbit-node:hover { transform: translateY(-2px) !important; }
  .research-orbit__header { flex-direction: column; align-items: flex-start; }
  .research-orbit__header .section__lead { text-align: left; }
}

/* ---------- 科研：alanhou 风格章节 + 论文标签切换 ---------- */
.chapter {
  max-width: 760px;
  margin: 0 auto 36px;
  text-align: center;
}
.chapter__kicker {
  display: block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1.5px;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 16px;
}
.chapter__title {
  font-size: clamp(28px, 5vw, 42px);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 18px;
  color: var(--text);
}
.chapter__lead {
  font-size: 16px;
  color: var(--text-soft);
  line-height: 1.7;
  max-width: 560px;
  margin: 0 auto;
}

.research-tabs {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}
.research-tab {
  appearance: none;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  color: var(--text-soft);
  padding: 10px 18px;
  border-radius: 999px;
  font-size: 14px;
  cursor: pointer;
  transition: background .2s ease, border-color .2s ease, color .2s ease;
}
.research-tab:hover { border-color: var(--accent); color: var(--accent); }
.research-tab.is-active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.research-tab__num {
  font-size: 11px;
  font-weight: 700;
  opacity: .75;
}
.research-tab__name { font-weight: 500; }

.research-case {
  display: none;
  animation: caseIn .5s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}
.research-case.is-active { display: block; }
@keyframes caseIn {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

.case-card {
  max-width: 820px;
  margin: 0 auto 28px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
}
.case-card__meta {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}
.case-card__badge {
  background: var(--accent);
  color: #fff;
  font-size: 11px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 999px;
  letter-spacing: .3px;
}
.case-card__journal {
  font-size: 13px;
  color: var(--text-soft);
  font-style: italic;
}
.case-card__title {
  font-size: 24px;
  font-weight: 650;
  line-height: 1.35;
  margin-bottom: 24px;
  color: var(--text);
}

.case-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-bottom: 28px;
}
.case-stat {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px;
  text-align: center;
}
.case-stat strong {
  display: block;
  font-size: 34px;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 6px;
}
.case-stat span {
  font-size: 12px;
  color: var(--text-soft);
}

.case-flow {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-bottom: 24px;
}
.case-step {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  position: relative;
}
.case-step__num {
  position: absolute;
  top: 12px;
  right: 12px;
  font-size: 11px;
  font-weight: 700;
  color: var(--accent);
  opacity: .6;
}
.case-step__name {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
}
.case-step p {
  font-size: 13px;
  color: var(--text-soft);
  line-height: 1.6;
  margin: 0;
}

.case-card__value {
  font-size: 14px;
  color: var(--text-soft);
  line-height: 1.7;
  margin: 0;
  padding: 16px;
  background: var(--bg);
  border-radius: 12px;
  border: 1px solid var(--border);
}
.case-card__value strong { color: var(--text); }

.case-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
  padding: 10px 16px;
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 10%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 35%, transparent);
  border-radius: 10px;
  text-decoration: none;
  transition: background .25s ease, border-color .25s ease, transform .25s ease;
}
.case-link:hover {
  background: color-mix(in srgb, var(--accent) 18%, transparent);
  border-color: var(--accent);
  transform: translateY(-1px);
}
.case-link__doi {
  font-size: 12px;
  font-weight: 400;
  color: var(--text-soft);
  font-family: var(--mono, ui-monospace, SFMono-Regular, Menlo, monospace);
}

.research-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  max-width: 820px;
  margin: 0 auto;
}
.research-mini {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}
.research-mini__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
  margin-bottom: 12px;
}
.research-mini h4 {
  font-size: 15px;
  font-weight: 650;
  margin-bottom: 8px;
  color: var(--text);
}
.research-mini p {
  font-size: 13px;
  color: var(--text-soft);
  line-height: 1.6;
  margin: 0;
}

@media (max-width: 760px) {
  .case-stats { grid-template-columns: 1fr; }
  .case-flow { grid-template-columns: 1fr; }
  .research-grid { grid-template-columns: 1fr; }
  .chapter { text-align: left; }
  .chapter__lead { margin: 0; }
  .research-tabs { justify-content: flex-start; }
}

/* ---------- AI Agent：四节点闭环流程动画 ---------- */
.aiagent__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  margin-bottom: 36px;
}

.replay-btn {
  appearance: none;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 14px;
  cursor: pointer;
  transition: background .2s ease, border-color .2s ease, color .2s ease;
}
.replay-btn:hover { border-color: var(--accent); color: var(--accent); }
.replay-btn.is-playing { border-color: var(--accent); background: var(--accent-soft); }
.replay-btn.is-playing .replay-label::after { content: "中"; }
.replay-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--text-soft);
  transition: background .3s ease, box-shadow .3s ease;
}
.replay-btn.is-playing .replay-dot {
  background: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
  animation: replayPulse 1.2s ease infinite;
}
@keyframes replayPulse {
  0%, 100% { box-shadow: 0 0 0 0 var(--accent-soft); }
  50% { box-shadow: 0 0 0 8px rgba(99,102,241,0); }
}

.agent-loop {
  position: relative;
  width: 100%;
  max-width: 960px;
  margin: 0 auto 40px;
  min-height: 220px;
}

.agent-loop__svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  overflow: visible;
}
.loop-line {
  fill: none;
  stroke: var(--border);
  stroke-width: 1.5;
  stroke-dasharray: 6 6;
  opacity: .65;
}
.loop-particle { opacity: 0; }
.agent-loop.is-playing .loop-particle { opacity: 1; }

.agent-loop__nodes {
  position: relative;
  z-index: 2;
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 220px;
  padding: 0 10px;
}

.loop-node {
  position: relative;
  width: 160px;
  height: 160px;
  display: grid;
  place-items: center;
  cursor: default;
}
.loop-node__ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 1px solid var(--border);
  transition: border-color .4s ease, box-shadow .4s ease, transform .4s ease;
}
.loop-node__core {
  position: relative;
  z-index: 1;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}
.loop-node__num {
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
  opacity: .7;
}
.loop-node__name {
  font-size: 15px;
  font-weight: 650;
  color: var(--text);
}

.loop-node.is-active .loop-node__ring {
  border-color: var(--accent);
  box-shadow: 0 0 40px var(--accent-soft), 0 0 0 1px var(--accent);
  transform: scale(1.04);
}
.loop-node.is-active .loop-node__num { opacity: 1; }

.agent-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  max-width: 960px;
  margin: 0 auto;
}
.metric-card {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 160px;
}
.metric-card__label {
  font-size: 12px;
  color: var(--text-soft);
  letter-spacing: .3px;
}
.metric-card__bars {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  height: 70px;
  margin: 10px 0;
}
.bar {
  width: 22px;
  border-radius: 4px 4px 0 0;
  background: var(--border);
  transition: height .9s cubic-bezier(0.22, 1, 0.36, 1);
}
.bar--after { background: var(--accent); }

.metric-card__value {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 600;
}
.metric-card__from { color: var(--text-soft); font-size: 18px; }
.metric-card__arrow { color: var(--accent); }
.metric-card__to { color: var(--text); }

.metric-card--wide {
  justify-content: flex-start;
  gap: 12px;
}
.metric-card__big {
  font-size: 52px;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
  font-variant-numeric: tabular-nums;
}
.metric-card__note {
  font-size: 13px;
  color: var(--text-soft);
  line-height: 1.5;
  margin: 0;
}

@media (max-width: 760px) {
  .agent-loop { min-height: auto; overflow-x: auto; }
  .agent-loop__svg { min-width: 760px; }
  .agent-loop__nodes { min-width: 760px; gap: 30px; padding: 0 20px; }
  .loop-node { width: 130px; height: 130px; flex-shrink: 0; }
  .loop-node__name { font-size: 13px; }
  .agent-metrics { grid-template-columns: 1fr; }
  .aiagent__header { flex-direction: column; gap: 16px; }
}

/* 尊重减少动效偏好 */
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .js .project-detail,
  .js .layer-detail,
  .js .orbit-detail { transition: none; }
  .planet { animation: none; }
  .explore-core__pulse { animation: none; }
  .explore, .radar-wrap { transition: none; }
  .radar-poly { transition: none; transform: scale(1); }
  .summary-box .cursor { animation: none; }
  .research-orbit.is-visible .orbit-node { animation: none; opacity: 1; }
  .replay-btn.is-playing .replay-dot { animation: none; }
  .loop-particle, .agent-loop.is-playing .loop-particle { animation: none !important; opacity: 1; }
  html { scroll-behavior: auto; }
}