/* =========================================================================
   HistoPilot 介绍主页（未登录 /）—— ZCode 风格深色产品页
   docs/histopilot-com-landing-page.md §2/§5
   - 深色底 #161616、近白正文、低对比描边 rgba(255,255,255,.10)
   - 主 CTA 白底黑字大圆角；次 CTA 透明描边
   - 系统字体栈（无外部字体/CDN）；尊重 prefers-reduced-motion
   ========================================================================= */

:root {
  --bg: #161616;
  --bg-raise: #1b1b1b;
  --bg-deep: #101010;
  --text: #f4f4f4;
  --text-2: rgba(244, 244, 244, 0.64);
  --text-3: rgba(244, 244, 244, 0.60);
  --line: rgba(255, 255, 255, 0.10);
  --line-strong: rgba(255, 255, 255, 0.18);
  --radius: 16px;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

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

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC",
               "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ---- 可访问性：跳过顶栏直达主内容 ---- */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  background: #fff;
  color: #111;
  font-size: 14px;
  font-weight: 600;
  padding: 10px 18px;
  border-radius: 0 0 10px 0;
  text-decoration: none;
}
.skip-link:focus { left: 0; }

a:focus-visible,
button:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 3px;
  border-radius: 6px;
}

/* =========================================================================
   顶栏（粘性：左品牌 / 中锚点 / 右语言 + 登录）
   ========================================================================= */
.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(22, 22, 22, 0.88);
  -webkit-backdrop-filter: saturate(150%) blur(12px);
  backdrop-filter: saturate(150%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.topbar-inner {
  max-width: 1120px;
  margin: 0 auto;
  min-height: 64px;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 28px;
}
.brand {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text);
  text-decoration: none;
  white-space: nowrap;
}
.nav-links {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 24px;
  flex: 1;
  min-width: 0;
}
.nav-links a {
  color: var(--text-2);
  font-size: 14px;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.15s ease;
}
.nav-links a:hover { color: var(--text); }
.nav-links .ext {
  font-size: 11px;
  color: var(--text-3);
  margin-left: 3px;
}
.topbar-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: auto;
}

/* ---- 语言切换（沿用 i18n.js 的 .lang-toggle，深色化） ---- */
.lang-toggle {
  height: 34px;
  min-width: 44px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  color: var(--text-2);
  font-size: 13px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: color 0.15s ease, border-color 0.15s ease;
}
.lang-toggle:hover { color: var(--text); border-color: var(--line-strong); }

/* =========================================================================
   按钮（主：白底黑字胶囊；次：透明描边）
   ========================================================================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 46px;
  padding: 0 26px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 15px;
  font-weight: 600;
  font-family: inherit;
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}
.btn-primary { background: #fff; color: #111; }
.btn-primary:hover { background: rgba(255, 255, 255, 0.86); color: #111; }
.btn-secondary {
  background: transparent;
  color: var(--text);
  border-color: var(--line-strong);
}
.btn-secondary:hover {
  border-color: rgba(255, 255, 255, 0.34);
  background: rgba(255, 255, 255, 0.05);
}
.btn-sm { height: 34px; padding: 0 18px; font-size: 13px; }
.logout-form { display: inline-flex; margin: 0; }

/* =========================================================================
   Hero：左文右 mock
   ========================================================================= */
.hero {
  max-width: 1120px;
  margin: 0 auto;
  padding: 72px 24px 64px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 540px);
  gap: 48px;
  align-items: center;
}
.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 5px 14px;
  font-size: 13px;
  color: var(--text-2);
  margin-bottom: 26px;
}
.badge::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--text-2);
  flex: 0 0 auto;
}
.hero h1 {
  font-size: clamp(40px, 5.2vw, 60px);
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: -0.025em;
  margin-bottom: 22px;
  text-wrap: balance;
}
.lead {
  font-size: 17px;
  color: var(--text-2);
  max-width: 54ch;
  margin-bottom: 36px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 18px;
}
.hero-hint { font-size: 13px; color: var(--text-3); }

/* =========================================================================
   产品 mock（纯 CSS，抽象 H&E，无真实切片；装饰性、不可点击）
   ========================================================================= */
.mock {
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
  background: var(--bg-deep);
}
.mock-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  height: 40px;
  padding: 0 14px;
  background: #181818;
  border-bottom: 1px solid var(--line);
}
.lights { display: flex; gap: 6px; }
.lights i { display: block; width: 10px; height: 10px; border-radius: 50%; }
.lights i:nth-child(1) { background: #ff5f57; }
.lights i:nth-child(2) { background: #febc2e; }
.lights i:nth-child(3) { background: #28c840; }
.mock-title {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-3);
}
.mock-body {
  display: grid;
  grid-template-columns: 62% 38%;
}

/* 左：抽象组织（嗜伊红粉 / 苏木素紫 / 脂肪空泡） */
.tissue {
  position: relative;
  min-height: 330px;
  border-right: 1px solid var(--line);
  overflow: hidden;
  background:
    radial-gradient(closest-side at 22% 28%, rgba(158, 58, 88, 0.60), transparent 72%),
    radial-gradient(closest-side at 64% 68%, rgba(118, 82, 132, 0.52), transparent 74%),
    radial-gradient(closest-side at 82% 20%, rgba(217, 140, 156, 0.42), transparent 70%),
    radial-gradient(closest-side at 40% 84%, rgba(122, 62, 78, 0.5), transparent 72%),
    linear-gradient(145deg, #2b1521, #1f1524 55%, #261a21);
}
.tissue .gland {
  position: absolute;
  border-radius: 46% 54% 52% 48% / 55% 46% 54% 45%;
  background: rgba(196, 106, 130, 0.34);
  border: 1px solid rgba(233, 168, 184, 0.28);
}
.tissue .g1 { width: 88px; height: 72px; left: 10%; top: 14%; }
.tissue .g2 { width: 66px; height: 56px; left: 30%; top: 40%; transform: rotate(24deg); }
.tissue .g3 { width: 74px; height: 60px; left: 8%; top: 58%; transform: rotate(-14deg); }
.tissue .vac {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 228, 214, 0.08);
  border: 1px solid rgba(255, 228, 214, 0.16);
}
.tissue .v1 { width: 52px; height: 52px; right: 16%; top: 16%; }
.tissue .v2 { width: 38px; height: 38px; right: 8%; top: 46%; }
.tissue .v3 { width: 30px; height: 30px; right: 24%; top: 66%; }
/* Agent 留下的观察框（坐标语义，非真实病变） */
.tissue .obs {
  position: absolute;
  left: 42%;
  top: 34%;
  width: 86px;
  height: 64px;
  border: 1.5px solid rgba(255, 255, 255, 0.9);
  border-radius: 5px;
  box-shadow: 0 0 0 320px rgba(0, 0, 0, 0.10);
}
.tissue .obs::before {
  content: "(12.4, 8.1) mm";
  position: absolute;
  top: -22px;
  left: 0;
  font-family: var(--mono);
  font-size: 10px;
  color: rgba(255, 255, 255, 0.85);
  white-space: nowrap;
}
.tissue .obs::after {
  content: "20×";
  position: absolute;
  right: -8px;
  bottom: -22px;
  font-family: var(--mono);
  font-size: 10px;
  color: rgba(255, 255, 255, 0.85);
}
.tissue .scale {
  position: absolute;
  left: 14px;
  bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 10px;
  color: rgba(255, 255, 255, 0.7);
}
.tissue .scale i {
  display: block;
  width: 64px;
  height: 2px;
  background: rgba(255, 255, 255, 0.75);
}
.tissue .zoomctl {
  position: absolute;
  right: 12px;
  bottom: 10px;
  display: flex;
  align-items: center;
  gap: 2px;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(0, 0, 0, 0.38);
  font-family: var(--mono);
  font-size: 11px;
  color: rgba(255, 255, 255, 0.8);
}
.tissue .zoomctl span {
  display: grid;
  place-items: center;
  width: 26px;
  height: 22px;
  border-radius: 5px;
}
.tissue .zoomctl .zlvl { color: var(--text-3); }

/* 右：Agent 面板（4 条固定轨迹，i18n 切换） */
.agent {
  padding: 18px 16px 16px;
  background: #141414;
  display: flex;
  flex-direction: column;
  min-height: 330px;
}
.agent-head {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 14px;
}
.agent-head .pulse {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #6fdf8f;
  animation: hp-pulse 2.2s ease-in-out infinite;
}
@keyframes hp-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}
.agent ol { list-style: none; display: flex; flex-direction: column; gap: 12px; }
.agent li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--text-3);
}
.agent li .n {
  flex: 0 0 auto;
  width: 20px;
  height: 20px;
  margin-top: 1px;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--text-2);
}
.agent li.done { color: var(--text-2); }
.agent li.done .n {
  background: rgba(255, 255, 255, 0.92);
  border-color: transparent;
  color: #111;
}
.agent li.active { color: var(--text); }
.agent li.active .n { border-color: #fff; color: var(--text); }
.agent .agent-foot {
  margin-top: auto;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 10px;
  color: var(--text-3);
}

/* =========================================================================
   区块通用
   ========================================================================= */
.section {
  max-width: 1120px;
  margin: 0 auto;
  padding: 56px 24px;
}
.kicker {
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 12px;
}
.section h2 {
  font-size: clamp(28px, 3.2vw, 38px);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 32px;
  text-wrap: balance;
}

/* ---- 更新内容 ---- */
.whats-new-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
  max-width: 720px;
}
.whats-new-release {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--bg-raise);
  padding: 18px 20px 8px;
}
.whats-new-release.is-latest {
  border-color: var(--line-strong);
}
.whats-new-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px 16px;
  margin-bottom: 12px;
  list-style: none;
}
.whats-new-release:not(.is-latest) .whats-new-head { cursor: pointer; }
.whats-new-version {
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 650;
}
.whats-new-date {
  font-size: 13px;
  color: var(--text-3);
}
.whats-new-items {
  margin: 0 0 12px 1.1em;
  padding: 0;
}
.whats-new-items li {
  font-size: 14px;
  color: var(--text-2);
  margin: 0 0 8px;
}
.whats-new-empty { font-size: 14px; color: var(--text-2); }
.whats-new-release summary::-webkit-details-marker { display: none; }
.whats-new-release summary::after {
  content: "";
  margin-left: auto;
  width: 0.55em;
  height: 0.55em;
  border-right: 1.5px solid var(--text-3);
  border-bottom: 1.5px solid var(--text-3);
  transform: rotate(45deg);
  transition: transform 0.15s ease;
}
.whats-new-release[open] summary::after { transform: rotate(225deg); }

/* ---- 产品如何工作：三列步骤 ---- */
.how-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.how-card { border-top: 1px solid var(--line); padding-top: 22px; }
.how-card .no {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-3);
  display: block;
  margin-bottom: 14px;
}
.how-card h3 {
  font-size: 17px;
  font-weight: 650;
  letter-spacing: -0.01em;
  margin-bottom: 8px;
}
.how-card p { font-size: 14px; color: var(--text-2); }

.section-lead {
  max-width: 68ch;
  color: var(--text-2);
  font-size: 16px;
  margin: 12px 0 28px;
}

/* ---- 原理演示舞台 ---- */
.demo-stage {
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
  background: var(--bg-deep);
}
.demo-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
  background: #181818;
}
.demo-tabs { display: flex; gap: 8px; }
.demo-tab {
  height: 32px;
  padding: 0 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--text-2);
  font: inherit;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
}
.demo-tab.is-on {
  background: #fff;
  color: #111;
  border-color: transparent;
}
.demo-actions { display: flex; gap: 8px; margin-left: auto; }
.demo-body {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(240px, 0.8fr);
}
.slide-stage {
  position: relative;
  min-height: 340px;
  overflow: hidden;
  background: linear-gradient(145deg, #2b1521, #1f1524 55%, #261a21);
}
.slide-world {
  position: absolute;
  inset: 0;
  background: linear-gradient(145deg, #814c68, #bc7d91 55%, #97617b);
  transform: scale(1);
  transform-origin: center;

}
.slide-stage .scale,
.slide-stage .zoomctl {
  position: absolute;
  z-index: 2;
  font-family: var(--mono);
  font-size: 11px;
  color: rgba(255, 255, 255, 0.78);
}
.slide-stage .scale { left: 14px; bottom: 12px; }
.slide-stage .zoomctl {
  right: 12px;
  bottom: 10px;
  padding: 4px 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(0, 0, 0, 0.38);
}
.demo-panel {
  padding: 18px 16px 16px;
  background: #141414;
  border-left: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.demo-status { font-size: 14px; color: var(--text); line-height: 1.55; }
.demo-steps { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.demo-steps.is-hidden { display: none; }
.demo-steps li {
  font-size: 13px;
  color: var(--text-3);
  padding-left: 18px;
  position: relative;
}
.demo-steps li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  border: 1px solid var(--line-strong);
}
.demo-steps li.is-on { color: var(--text); }
.demo-steps li.is-on::before { background: #fff; border-color: #fff; }
.demo-steps li.is-done { color: var(--text-2); }
.demo-steps li.is-done::before { background: rgba(255, 255, 255, 0.55); }
.demo-footnote { margin-top: auto; font-size: 12px; color: var(--text-3); }

/* ---- 能力：三张卡 ---- */
.cap-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.cap-grid-3 { grid-template-columns: repeat(3, 1fr); }
.cap-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 20px 24px;
  background: var(--bg-raise);
  transition: border-color 0.15s ease;
}
.cap-card:hover { border-color: var(--line-strong); }
.cap-card .icon {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  margin-bottom: 16px;
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--text-2);
}
.cap-card h3 {
  font-size: 15.5px;
  font-weight: 650;
  margin-bottom: 6px;
}
.cap-card p { font-size: 13.5px; color: var(--text-2); }

/* ---- 套件：三张仓库卡 ---- */
.suite-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.suite-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 20px;
  transition: border-color 0.15s ease;
}
.suite-card:hover { border-color: var(--line-strong); }
.suite-card .repo {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--text-3);
}
.suite-card h3 { font-size: 17px; font-weight: 650; letter-spacing: -0.01em; }
.suite-card p { font-size: 14px; color: var(--text-2); flex: 1; }
.suite-card a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 10px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  color: var(--text);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
}
.suite-card a .arrow { transition: transform 0.15s ease; }
.suite-card a:hover .arrow { transform: translateX(3px); }

/* ---- 关闭 CTA ---- */
.cta-section { text-align: center; padding: 104px 24px; }
.cta-section h2 {
  font-size: clamp(30px, 3.6vw, 46px);
  margin-bottom: 18px;
}
.cta-section .cta-body {
  max-width: 56ch;
  margin: 0 auto 36px;
  color: var(--text-2);
  font-size: 16px;
}
.cta-section .hero-actions { justify-content: center; }

/* =========================================================================
   页脚
   ========================================================================= */
.footer { border-top: 1px solid var(--line); }
.footer-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 44px 24px 52px;
}
.footer-note { font-size: 13.5px; color: var(--text-2); margin-bottom: 20px; }
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  margin-bottom: 24px;
}
.footer-links a {
  color: var(--text-3);
  font-size: 13px;
  text-decoration: none;
  transition: color 0.15s ease;
}
.footer-links a:hover { color: var(--text); }
.footer-links .sep { color: var(--text-3); font-size: 13px; }
.footer-copy { font-size: 12px; color: var(--text-3); }

/* =========================================================================
   响应式
   ========================================================================= */
@media (max-width: 1079px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 48px;
    padding-top: 56px;
    padding-bottom: 64px;
  }
  .how-grid { grid-template-columns: 1fr; gap: 28px; }
  .cap-grid,
  .cap-grid-3 { grid-template-columns: repeat(2, 1fr); }
  .demo-body { grid-template-columns: 1fr; }
  .demo-panel { border-left: none; border-top: 1px solid var(--line); }
  .suite-grid { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .topbar-inner {
    flex-wrap: wrap;
    padding: 10px 16px;
    row-gap: 8px;
  }
  .nav-links {
    order: 3;
    flex: 0 0 100%;
    width: 100%;
    overflow-x: auto;
    gap: 18px;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }
  .nav-links::-webkit-scrollbar { display: none; }
  .hero h1 { font-size: 36px; }
  .hero { padding: 40px 16px 56px; }
  .section { padding: 56px 16px; }
  .cap-grid,
  .cap-grid-3 { grid-template-columns: 1fr; }
  .mock-body { grid-template-columns: 1fr; }
  .demo-toolbar { flex-direction: column; align-items: stretch; }
  .demo-actions { margin-left: 0; }
  .tissue { min-height: 220px; border-right: none; border-bottom: 1px solid var(--line); }
  .agent { min-height: 0; }
  .hero-actions .btn { flex: 1 1 auto; }
  .cta-section { padding: 72px 16px; }
}

/* =========================================================================
   减少动画（prefers-reduced-motion）
   ========================================================================= */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}

/* A single product flow, with an actual shared camera for all magnifications. */
.demo-heading { margin-top: 32px; font-size: 22px; scroll-margin-top: 100px; }
.slide-stage .scale { display: flex; align-items: center; gap: 8px; }
.slide-stage .scale i { display: block; width: 64px; border-bottom: 2px solid currentColor; }
.slide-stage .zoomctl button { width: 32px; height: 32px; border: 0; border-radius: 4px; background: #333; color: #fff; font: inherit; font-size: 20px; cursor: pointer; }
.slide-stage .zoomctl button:disabled { opacity: .4; cursor: default; }

.demo-loop-hint { margin-left: auto; font-size: 12px; color: var(--text-3); }

/* 复核解读卡：钉弹出时淡入；目标区用待复核强调色，非目标用中性描边。 */
.demo-review { display: none; padding: 12px; border: 1px solid #5c6470; border-radius: 8px; color: #dfe3e8; font-size: 13px; line-height: 1.6; }
.demo-review.is-in { display: block; animation: hp-card-in .35s ease; }
.demo-review.is-target { border-color: #a98034; color: #f4e3c0; background: #2a2416; }
@keyframes hp-card-in { from { opacity: 0; transform: translateY(4px); } }

/* Real TCGA viewports, placed in the same level-0 coordinate system.
   方形世界 = 79680×79680（level-0）；79680×51516 的整片底图垂直居中，
   上下留白与切片背景同色，等比缩放无拉伸。 */
.tissue { background: #f4eff0; }
.hero-slide { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; display: block; }
.tissue .scale { background: #171717d9; padding: 5px 8px; border-radius: 4px; color: #fff; }
.slide-stage { aspect-ratio: 1; min-height: 0; align-self: start; background: #111; }
.shot-viewport { position: absolute; inset: 0; overflow: hidden; background: #1a1416; }
.shot-img {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: cover; pointer-events: none; opacity: 0;
  will-change: transform, opacity;
  transform-origin: 50% 50%;
  backface-visibility: hidden;
}
.shot-img.is-wide { object-fit: contain; }

/* 蓝框：模拟 Agent 在图上画出的观察框；解读贴在框边逐字流出。 */
.anno-box {
  position: absolute;
  border: 2px solid #007AFF;
  background: rgba(0, 122, 255, 0.10);
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.55);
  opacity: 0;
  pointer-events: none;
  z-index: 4;
}
.anno-box.is-on { opacity: 1; }
.anno-a { left: 26%; top: 5%; width: 48%; height: 40%; }
.anno-b { left: 5%; top: 12%; width: 50%; height: 44%; }
.anno-a.is-wide { left: 27%; top: 50%; width: 10%; height: 12%; }
.anno-b.is-wide { left: 76%; top: 55%; width: 10%; height: 12%; }
.anno-caption {
  position: absolute;
  left: 0;
  top: calc(100% + 8px);
  width: max(180px, 100%);
  max-width: 240px;
  padding: 8px 10px;
  border-radius: 6px;
  background: rgba(12, 18, 28, 0.92);
  border-left: 3px solid #007AFF;
  color: #e8f1ff;
  font-size: 12px;
  line-height: 1.55;
  white-space: pre-wrap;
}
.anno-b .anno-caption { left: calc(100% + 8px); top: 0; width: 200px; }
.anno-box.is-wide .anno-caption { width: 150px; font-size: 11px; }
.anno-b.is-wide .anno-caption { left: auto; right: calc(100% + 8px); width: 150px; }
.slide-stage .scale { background: #171717d9; padding: 5px 8px; border-radius: 4px; color: #fff; }
.demo-source { font-size: 12px; color: var(--text-2); margin-top: auto; }
.demo-footnote { margin-top: 0; }

@media (prefers-reduced-motion: reduce) {
  .anno-box.is-on { opacity: 1; }
}

/* Homepage review: clearer hierarchy and labels that stay inside the viewport. */
.section { scroll-margin-top: 112px; }
.mock { box-shadow: 0 20px 64px #0003; }
.hero-copy { min-width: 0; }
.agent .agent-foot { margin-top: 24px; }
.demo-panel { padding: 24px; }
.demo-status { min-height: 4.8em; }
.demo-steps li { padding: 9px 12px 9px 28px; border-radius: 6px; }
.demo-steps li::before { left: 10px; top: 16px; }
.demo-steps li.is-on { background: #ffffff0a; }
.slide-stage .zoomctl { display: flex; align-items: center; gap: 5px; }
.slide-stage .zoomctl .zlvl { min-width: 48px; text-align: center; }
@media (max-width: 1079px) and (min-width: 721px) {
  .hero { gap: 32px; }
  .hero-copy { max-width: 680px; }
  .how-grid, .cap-grid-3, .suite-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .demo-body { grid-template-columns: minmax(0, 1.4fr) minmax(240px, .8fr); }
}
@media (max-width: 720px) {
  .hero { gap: 28px; }
  .hero h1 { font-size: clamp(32px, 8vw, 42px); }
  .lead { font-size: 16px; margin-bottom: 24px; }
  .badge { font-size: 11px; margin-bottom: 20px; }
  .agent { padding: 16px; }
  .agent ol { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .agent .agent-foot { margin-top: 16px; }
  .demo-loop-hint { margin-left: 0; }
  .demo-panel { padding: 18px 16px; }
  .demo-steps { flex-direction: row; flex-wrap: wrap; gap: 4px; }
  .demo-status { min-height: 0; }
  .slide-stage .zoomctl button { width: 40px; height: 40px; }
  .anno-b:not(.is-wide) .anno-caption { left: 0; top: calc(100% + 8px); width: 220px; max-width: 80vw; }
  .anno-box.is-wide .anno-caption { width: 116px; }
  .anno-a.is-wide .anno-caption { left: -60px; }
  .anno-b.is-wide .anno-caption { left: auto; right: 0; top: calc(100% + 38px); width: 130px; }
  .topbar-actions { gap: 6px; }
  .topbar-actions .btn-sm { padding: 0 12px; }
}

/* Approved SVG tissue walkthrough, scoped to the homepage component. */
.tissue-demo .viewer{border:1px solid #ffffff1c;border-radius:15px;overflow:hidden;background:#1b191c;box-shadow:0 25px 70px #0003}
.tissue-demo .toolbar{display:flex;justify-content:space-between;gap:12px;align-items:center;padding:16px 20px;border-bottom:1px solid #ffffff13;font-size:13px}
.tissue-demo .toolbar>span:first-child{display:flex;align-items:center;gap:8px}
.tissue-demo .toolbar i{display:block;width:7px;height:7px;border-radius:50%;background:#ba829f}
.tissue-demo .schematic{color:#aba0ae;font-size:11px}
.tissue-demo .body{display:grid;grid-template-columns:minmax(0,1fr) 284px}
.tissue-demo .canvas{position:relative;overflow:hidden;aspect-ratio:900/680;background:#edc5d4}
.tissue-demo #tissue{display:block;width:100%;height:100%;overflow:hidden}
.tissue-demo .corner{position:absolute;bottom:15px;left:15px;background:#251525d9;border:1px solid #ffffff33;padding:7px 10px;border-radius:6px;font-size:11px;color:#f7eef4;display:flex;gap:8px}
.tissue-demo .dot{color:#af8fa9}
.tissue-demo aside{padding:25px 23px;display:flex;flex-direction:column;border-left:1px solid #ffffff12}
.tissue-demo .agent-label{font-size:10px;letter-spacing:1.4px;color:#ac9ead;display:flex;align-items:center;gap:7px}
.tissue-demo .agent-dot{width:6px;height:6px;border-radius:50%;background:#93c9b0}
.tissue-demo aside h2{font-size:19px;line-height:1.45;font-weight:600;margin:25px 0 12px}
.tissue-demo #status{font-size:13px;line-height:1.85;color:#bdb3c0;min-height:76px;margin:0}
.tissue-demo ol{list-style:none;padding:0;display:grid;gap:4px;margin:23px 0}
.tissue-demo li{color:#958a99;font-size:12px;position:relative;padding:9px 12px 9px 28px;border-radius:5px}
.tissue-demo li:before{content:"";width:6px;height:6px;position:absolute;left:10px;top:13px;border:1px solid #807184;border-radius:50%}
.tissue-demo li.active{background:#ffffff08;color:#f5eef6}
.tissue-demo li.active:before{background:#d9b0c8;border-color:#d9b0c8}
.tissue-demo li.done:before{background:#7d6073;border-color:#7d6073}
.tissue-demo .legend{margin-top:auto;display:flex;flex-wrap:wrap;gap:13px;font-size:10px;color:#b4a7b8}
.tissue-demo .legend span{display:flex;align-items:center;gap:5px}
.tissue-demo .legend i{width:9px;height:9px;display:block;border-radius:50%}
.tissue-demo .nucleus{background:#8d497f}
.tissue-demo .lumen{background:#f4e5e6}
.tissue-demo .legend .mark{border:1px solid #007aff;border-radius:2px}
.tissue-demo .aside-note{font-size:10px;line-height:1.8;color:#948898;border-top:1px solid #ffffff10;padding-top:15px;margin:18px 0 0}
.tissue-demo .controls{padding:13px 18px;display:flex;align-items:center;gap:9px;border-top:1px solid #ffffff13}
.tissue-demo .progress{height:2px;background:#ffffff15;flex:1;margin-right:12px;border-radius:5px;overflow:hidden}
.tissue-demo .progress span{display:block;width:0;height:100%;background:#ca9bb8}
.tissue-demo #count{font-size:10px;font-variant-numeric:tabular-nums;color:#a89bae;margin-right:5px}
.tissue-demo button{border:1px solid #ffffff1a;background:#242026;color:#dcd2df;min-width:34px;height:34px;border-radius:6px;padding:0 10px;font:inherit;font-size:12px;cursor:pointer}
.tissue-demo button:hover{border-color:#a9819a;background:#312935}
.tissue-demo button:disabled{opacity:.3;cursor:default}
.tissue-demo button:focus-visible{outline:2px solid #dba9c9;outline-offset:3px}
.tissue-demo .note{position:absolute;left:20px;right:20px;bottom:57px;display:flex;gap:12px;padding:13px 15px;background:#171d2bed;border:1px solid #7caceb55;border-left:3px solid #007aff;border-radius:7px;max-width:350px;color:#edf3ff}
.tissue-demo .note[hidden]{display:none}
.tissue-demo .note>span{font-size:12px;color:#89b9ff;margin-top:2px}
.tissue-demo .note strong{font-size:12px;font-weight:600}
.tissue-demo .note p{font-size:11px;line-height:1.7;color:#b9c9e2;margin:5px 0 0}
@media(max-width:760px){.tissue-demo .body{grid-template-columns:1fr}
.tissue-demo .canvas{aspect-ratio:1}
.tissue-demo aside{border-left:0;border-top:1px solid #ffffff12;padding:20px}
.tissue-demo aside h2{margin:14px 0 8px;font-size:17px}
.tissue-demo #status{min-height:0}
.tissue-demo ol{display:flex;flex-wrap:wrap;margin:16px 0;gap:2px}
.tissue-demo li{font-size:11px;padding:8px 8px 8px 23px}
.tissue-demo li:before{left:9px;top:11px}
.tissue-demo .legend{margin-top:4px}
.tissue-demo .aside-note{margin-top:14px}
.tissue-demo .toolbar{padding:13px;font-size:12px}
.tissue-demo .schematic{font-size:10px}
.tissue-demo .controls{padding:12px;gap:6px}
.tissue-demo button{height:40px;min-width:37px}
.tissue-demo .note{left:14px;right:14px;bottom:57px;max-width:310px}
.tissue-demo .progress{margin-right:3px}
.tissue-demo #count{font-size:9px}
}
.tissue-demo #note-body{min-height:3.4em}
.tissue-demo #note-title.streaming::after,.tissue-demo #note-body.streaming::after{content:"▍";color:#8cbdff;margin-left:2px}
.tissue-demo .review-pin{position:absolute;max-width:180px;width:43%;padding:9px 11px;border:1px solid #79acff80;border-left:3px solid #007aff;border-radius:6px;background:#152237ed;color:#edf3ff;pointer-events:none;box-shadow:0 3px 14px #0002}
.tissue-demo .review-pin[hidden]{display:none}
.tissue-demo .review-pin strong{display:block;font-size:11px;font-weight:600}
.tissue-demo .review-pin span{display:block;margin-top:4px;font-size:10px;line-height:1.5;color:#c7d9f2}
.tissue-demo #note-title{display:block;min-height:1.5em}

.tissue-demo #tissue{max-width:100%}.tissue-demo .viewer{box-shadow:none}.tissue-demo .body{grid-template-columns:minmax(0,1fr) 270px}@media(max-width:760px){.tissue-demo .body{grid-template-columns:1fr}}

/* =========================================================================
   登录弹窗（<dialog id="login-dialog">，_login_dialog.html）
   - showModal：top-layer 居中 + ::backdrop 半透明遮罩（entry-auth.js 升级模态）
   - 无 JS 退化：服务端 open 属性直出时按 fixed 居中浮层呈现
   - body.login-dialog-open 期间锁定背景滚动
   ========================================================================= */
.login-dialog {
  position: fixed;
  inset: 0;
  margin: auto;
  width: min(400px, calc(100vw - 32px));
  height: fit-content;
  max-height: calc(100vh - 32px);
  overflow: auto;
  padding: 0;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--bg-raise);
  color: var(--text);
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.5);
}
.login-dialog::backdrop {
  background: rgba(0, 0, 0, 0.62);
}
body.login-dialog-open { overflow: hidden; }

.login-dialog-card {
  position: relative;
  padding: 36px 32px 28px;
}
.login-dialog-close {
  position: absolute;
  top: 10px;
  right: 12px;
  width: 34px;
  height: 34px;
  padding: 0;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: var(--text-2);
  font: inherit;
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
}
.login-dialog-close:hover { background: rgba(255, 255, 255, 0.08); color: var(--text); }
.login-dialog-close:focus-visible { outline: 2px solid #fff; outline-offset: 2px; }

.login-dialog-kicker {
  margin-bottom: 6px;
  font-size: 12px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-3);
}
.login-dialog h2 {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.2px;
}
.login-dialog-subtitle {
  margin: 6px 0 18px;
  font-size: 14px;
  color: var(--text-2);
}

.login-dialog-message,
.login-dialog-error {
  margin-bottom: 14px;
  padding: 10px 12px;
  border-radius: 10px;
  font-size: 13px;
}
.login-dialog-message {
  background: rgba(52, 199, 89, 0.12);
  border: 1px solid rgba(52, 199, 89, 0.35);
  color: #7ddc9a;
}
.login-dialog-error {
  background: rgba(255, 69, 58, 0.12);
  border: 1px solid rgba(255, 69, 58, 0.35);
  color: #ff8a80;
}
.login-dialog-error #login-dialog-countdown,
.login-dialog-error #register-dialog-countdown { font-variant-numeric: tabular-nums; }

/* 双视图（登录/注册）：一次只显示一个（hidden 属性兜底 display:none） */
.login-dialog .auth-view[hidden] { display: none; }
.login-dialog-hint {
  margin: 6px 0 0;
  font-size: 12px;
  line-height: 1.5;
  color: var(--text-3);
}

/* P1 public 注册：双协议复选框（独立成行、不合并、不预勾选；链接新窗口
   打开且不影响选中状态，§3.1） */
.login-dialog form label.login-dialog-check {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  margin: 12px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-2);
  cursor: pointer;
}
.login-dialog form label.login-dialog-check input[type="checkbox"] {
  width: 15px;
  height: 15px;
  flex: none;
  margin: 3px 0 0;
}
.login-dialog form label.login-dialog-check a {
  color: var(--text);
  border-bottom: 1px solid var(--line-strong);
  text-decoration: none;
}
.login-dialog form label.login-dialog-check a:hover { border-bottom-color: var(--text); }

.login-dialog form label {
  display: block;
  margin: 10px 0 6px;
  font-size: 13px;
  color: var(--text-2);
}
.login-dialog form input {
  width: 100%;
  height: 42px;
  padding: 0 12px;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  background: var(--bg-deep);
  color: var(--text);
  font: inherit;
  font-size: 14px;
}
.login-dialog form input:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 1px;
  border-color: transparent;
}
.login-dialog-submit {
  width: 100%;
  height: 44px;
  margin-top: 18px;
  padding: 0;
  border: none;
  border-radius: 10px;
  background: #fff;
  color: #111;
  font: inherit;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
}
.login-dialog-submit:hover { background: rgba(255, 255, 255, 0.86); }
.login-dialog-submit:focus-visible { outline: 2px solid #fff; outline-offset: 3px; }
.login-dialog-submit:disabled { opacity: 0.5; cursor: default; }

.login-dialog-links {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  margin-top: 16px;
  font-size: 13px;
}
.login-dialog-links a {
  color: var(--text);
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
  padding-bottom: 1px;
}
.login-dialog-links a:hover { border-bottom-color: var(--text); }

.login-dialog-forgot {
  margin-top: 14px;
  font-size: 12px;
  color: var(--text-3);
}

@media (max-width: 720px) {
  .login-dialog { width: calc(100vw - 24px); max-height: calc(100vh - 24px); }
  .login-dialog-card { padding: 28px 20px 22px; }
  .login-dialog-links { flex-direction: column; gap: 10px; }
}