/* ==========================================================================
   个人作品集 · 暗色旗舰版（黑白灰 × 品牌红）
   · 黑白灰绝对主导，红色只做点睛：按钮 / 关键词 / 当前项 / 大数字 / 进度线
   · 三层表面：页面背景 → 普通卡片(surface) → 浮层(抽屉/弹窗 surface-raised)
   · 动效只有功能性：开场快闪、逐行揭示、滑轨切换、悬停焦点、抽屉展开
   ========================================================================== */

:root {
  /* 底色体系：三层表面 + 文字层级 */
  --bg: #090a0c;
  --bg-soft: #101216;
  --surface: #15171b;
  --surface-raised: #1c1f25;
  --surface-hover: #23272f;

  --text: #f4f4f2;
  --text-soft: #d3d4d2;
  --muted: #858b94;
  --muted-dark: #5c6169;

  --border: rgba(255, 255, 255, 0.10);
  --border-strong: rgba(255, 255, 255, 0.18);

  /* 品牌红：默认深红，交互态用亮红 */
  --brand: #e60008;
  --brand-bright: #ff3d46;
  --brand-soft: rgba(230, 0, 8, 0.18);
  --brand-glow: rgba(230, 0, 8, 0.32);
  --brand-text: #ff444f; /* 暗底文字用提亮变体保证对比度 */

  --paper: #ede8e2;
  --ink: #17181a;

  /* 进行中徽标 */
  --status: #fbbf24;

  /* 字体 */
  --font-body: -apple-system, BlinkMacSystemFont, "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans CN",
    "Noto Sans SC", "Segoe UI", sans-serif;
  --font-mono: ui-monospace, "Cascadia Code", "JetBrains Mono", Consolas,
    "Courier New", monospace;

  /* 布局 */
  --container: 1160px;
  --radius: 14px;
  --header-h: 68px;

  /* 动效规范：时长 + 缓动 */
  --duration-fast: 180ms;
  --duration-normal: 320ms;
  --duration-slow: 520ms;
  --duration-reveal: 720ms;
  --ease-standard: cubic-bezier(0.2, 0.8, 0.2, 1);
  --ease-emphasized: cubic-bezier(0.22, 0.61, 0.36, 1);
  --ease-spring: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out: var(--ease-emphasized); /* 兼容旧引用 */
}

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

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

html {
  scroll-padding-top: 76px;
  overflow-x: clip;
  /* 隐藏原生滚动条（右侧白色滑条），滚动功能不受影响 */
  scrollbar-width: none; /* Firefox */
}
html::-webkit-scrollbar { display: none; } /* Chrome / Edge / Safari */
body::-webkit-scrollbar { display: none; }

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.72;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  isolation: isolate;
  overflow-x: clip; /* 滑入动画期间防止瞬时横向溢出（不影响 sticky） */
}

/* 环境光：首屏上方极淡品牌红晕 + 页面底部轻微灰白光（都不喧宾夺主） */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(46rem 26rem at 16% -6%, rgba(230, 0, 8, 0.10), transparent 62%),
    radial-gradient(60rem 40rem at 85% 108%, rgba(255, 255, 255, 0.045), transparent 60%);
  pointer-events: none;
}

/* 背景噪点：soft-light 极低透明度，铺在最上层但不拦截交互 */
.bg-noise {
  position: fixed;
  inset: 0;
  z-index: 400;
  pointer-events: none;
  opacity: 0.025;
  mix-blend-mode: soft-light;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 180px 180px;
}

::selection { background: var(--brand); color: #fff; }

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

.container { width: min(var(--container), 92%); margin-inline: auto; }
.mono { font-family: var(--font-mono); }

a:focus-visible, button:focus-visible {
  outline: 2px solid var(--brand-text);
  outline-offset: 3px;
  border-radius: 6px;
}

/* ---------- 顶部导航：初始透明融入 Hero，滚动后磨砂实底 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background var(--duration-normal) var(--ease-standard),
    border-color var(--duration-normal) var(--ease-standard),
    box-shadow var(--duration-normal) var(--ease-standard);
}
.site-header.solid {
  background: rgba(9, 10, 12, 0.72);
  border-bottom-color: var(--border);
  box-shadow: 0 10px 34px -20px rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

/* 顶部导航：三列 Grid —— Logo 左 / 导航严格视口水平居中 / 右侧状态+菜单按钮 */
.header-inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  height: var(--header-h);
  transition: height var(--duration-normal) var(--ease-standard);
}
.site-header.solid .header-inner { height: 60px; }

.logo {
  justify-self: start;
  font-weight: 800;
  font-size: 1.02rem;
  letter-spacing: 0.02em;
  transition: font-size var(--duration-normal) var(--ease-standard);
}
.site-header.solid .logo { font-size: 0.94rem; }
.logo-alias { font-size: 0.78em; font-weight: 600; color: var(--muted); }

.site-nav { justify-self: center; display: flex; gap: 1.9rem; }

.header-side {
  justify-self: end;
  display: flex;
  align-items: center;
  gap: 1.1rem;
}
.header-status {
  display: inline-flex;
  align-items: center;
  gap: 0.55em;
  font-size: 0.66rem;
  letter-spacing: 0.22em;
  color: var(--muted);
  white-space: nowrap;
}
.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #34d399;
  box-shadow: 0 0 8px rgba(52, 211, 153, 0.55);
}
@media (max-width: 1080px) {
  .header-status { display: none; }
}

.site-nav a {
  position: relative;
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 550;
  padding-block: 4px;
  transition: color var(--duration-fast) var(--ease-standard);
}
.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 2px;
  background: var(--brand);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--duration-normal) var(--ease-emphasized);
}
.site-nav a:hover { color: var(--text); }
.site-nav a.active { color: var(--brand-text); }
.site-nav a.active::after { transform: scaleX(1); }

/* 编号：当前项编号随文字一起点亮 */
.nav-num {
  font-size: 0.66rem;
  font-weight: 700;
  color: var(--muted-dark);
  margin-right: 0.45em;
  letter-spacing: 0.06em;
  transition: color var(--duration-fast) var(--ease-standard);
}
.site-nav a:hover .nav-num,
.site-nav a.active .nav-num { color: var(--brand-text); }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 6px;
  width: 44px;
  height: 44px;
  background: none;
  border: 0;
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  transition: transform var(--duration-normal) var(--ease-emphasized);
}
.nav-toggle.open span:nth-child(1) { transform: translateY(4px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { transform: translateY(-4px) rotate(-45deg); }

/* ---------- 全屏页面分区 ---------- */
.page-section {
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  align-items: center;
}

/* ---------- 开场界面 · 品牌快闪（JS 可用时才启用，~1.7s 自动进入） ---------- */
.intro-screen { display: none; }
.has-intro .intro-screen {
  display: block;
  position: fixed;
  inset: 0;
  z-index: 300;
  background: var(--bg);
  overflow: hidden;
}
/* 作者层 display 会覆盖 UA 的 [hidden] 规则，必须显式声明 */
.intro-screen[hidden] { display: none !important; }

html.intro-open { overflow: hidden; }

.intro-stage {
  position: absolute;
  left: 50%;
  top: 46%;
  transform: translate(-50%, -50%);
  width: 100%;
  text-align: center;
  padding: 0 1.25rem;
  z-index: 1;
}

/* 问候语：主句由模糊进入 */
.intro-hello {
  font-size: clamp(2.4rem, 7.5vw, 4.8rem);
  font-weight: 900;
  line-height: 1.3;
  letter-spacing: 0.02em;
  color: var(--text);
  opacity: 0;
  animation: introBlurIn 0.6s var(--ease-emphasized) 0.05s forwards;
}
.intro-hello .hl { color: var(--brand-text); }

/* 副句：跟随升起 */
.intro-sub {
  margin-top: 0.7rem;
  font-size: clamp(1.05rem, 2.6vw, 1.5rem);
  font-weight: 600;
  letter-spacing: 0.14em;
  text-indent: 0.14em;
  color: var(--muted);
  opacity: 0;
  animation: introRise 0.55s var(--ease-emphasized) 0.3s forwards;
}

/* 开始探索：醒目品牌红主按钮 */
.intro-start {
  display: inline-flex;
  align-items: center;
  gap: 0.55em;
  margin-top: 2.6rem;
  border: 0;
  cursor: pointer;
  font-family: inherit;
  font-size: clamp(1rem, 2vw, 1.12rem);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-indent: 0.12em;
  color: #fff;
  background: var(--brand);
  border-radius: 12px;
  padding: 0.85em 2em;
  box-shadow: 0 16px 44px -14px var(--brand-glow);
  opacity: 0;
  animation: introRise 0.55s var(--ease-emphasized) 0.55s forwards;
  transition: transform var(--duration-fast) var(--ease-emphasized),
    filter var(--duration-fast) var(--ease-standard),
    box-shadow var(--duration-fast) var(--ease-standard);
}
.intro-start .intro-arrow {
  display: inline-block;
  text-indent: 0;
  transition: transform var(--duration-fast) var(--ease-emphasized);
}
.intro-start:hover,
.intro-start:focus-visible {
  transform: translateY(-2px);
  filter: brightness(1.12);
  box-shadow: 0 20px 52px -14px var(--brand-glow);
  outline-color: var(--brand-text);
}
.intro-start:hover .intro-arrow,
.intro-start:focus-visible .intro-arrow { transform: translateX(5px); }
.intro-start:active { transform: translateY(0); filter: brightness(0.96); }

@keyframes introBlurIn {
  from { opacity: 0; transform: translateY(14px); filter: blur(14px); }
  to   { opacity: 1; transform: translateY(0);    filter: blur(0); }
}
@keyframes introRise {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ---------- 转场 · 旋转擦除（品牌记忆点） ---------- */
.intro-wipe {
  position: fixed;
  inset: -60vmax;
  z-index: 2;
  background: var(--brand);
  pointer-events: none;
  transform: scale(0) rotate(-25deg);
  will-change: transform;
}
.intro-screen.wiping .intro-wipe {
  transform: scale(1) rotate(0deg);
  transition: transform 0.42s var(--ease-emphasized);
}
.intro-screen.revealing .intro-wipe {
  transform: rotate(20deg) translateY(-115%);
  transition: transform 0.38s var(--ease-emphasized);
}
/* 揭示阶段：红布盖满的瞬间，开场层自身立即透明化（背景变透明 + 内容隐藏），
   让红布旋开时揭开的是主页而不是开场画面 —— 否则红布走后会再闪现一次开场 */
.intro-screen.revealing {
  background: transparent;
  pointer-events: none;
}
.intro-screen.revealing .intro-stage {
  opacity: 0;
  transition: none;
}

/* ---------- 首屏：宣言式开场 ---------- */
.hero { position: relative; overflow: hidden; }

/* 首屏专属光晕：随滚动反向轻移（JS 视差） */
.hero-glow {
  position: absolute;
  top: -22%;
  left: 8%;
  width: 46rem;
  height: 30rem;
  z-index: 0;
  pointer-events: none;
  background: radial-gradient(closest-side, rgba(230, 0, 8, 0.14), transparent 70%);
  will-change: transform;
}
.hero .container { position: relative; z-index: 1; }

/* ---------- Hero 两列布局：左文案 55% / 右视觉 45% ---------- */
.hero-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
  align-items: center;
  gap: clamp(3rem, 7vw, 7rem);
}
.hero-copy { min-width: 0; }

/* 两列布局下标题略收一档，避免"小游戏"等词组被折行截断 */
.hero-layout .hero-title { font-size: clamp(2.4rem, 4.5vw, 4.5rem); }

/* ---------- Hero 右侧视觉容器（暂存视觉，未来可直接替换为真实图片） ---------- */
.hero-visual { min-width: 0; }

.hero-visual-frame {
  position: relative;
  aspect-ratio: 4 / 5;
  max-height: 560px;
  border-radius: 16px;
  background:
    radial-gradient(24rem 18rem at 78% 12%, rgba(230, 0, 8, 0.16), transparent 65%),
    linear-gradient(165deg, #1a1d22 0%, #101216 58%, #0b0c0f 100%);
  border: 1px solid var(--border);
  box-shadow:
    0 40px 90px -40px rgba(0, 0, 0, 0.9),
    0 0 90px -30px rgba(230, 0, 8, 0.16);
  overflow: hidden;
}
/* 未来真实图片：object-fit 裁切 + 保留下方取景框 / 编号 / 环境光 */
.hero-portrait {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}
.hero-visual-par {
  position: absolute;
  inset: 0;
  will-change: transform;
}
.hero-image-placeholder {
  position: absolute;
  inset: 0;
}

/* 抽象人物占位构图：暗色渐变 + 人物轮廓剪影 + 细网格 + 暗角（纯 CSS，无循环动画） */
.placeholder-art {
  position: absolute;
  inset: 0;
  background:
    /* 头部剪影 */
    radial-gradient(9.5rem 9.5rem at 50% 34%, rgba(244, 244, 242, 0.085) 0 61%, transparent 62%),
    /* 肩部剪影 */
    radial-gradient(19rem 13rem at 50% 96%, rgba(244, 244, 242, 0.07) 0 61%, transparent 62%),
    /* 环境红光 */
    radial-gradient(20rem 15rem at 76% 10%, rgba(230, 0, 8, 0.18), transparent 62%),
    /* 纵向细网格 */
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.028) 0 1px, transparent 1px 64px),
    repeating-linear-gradient(0deg, rgba(255, 255, 255, 0.02) 0 1px, transparent 1px 64px),
    /* 底部渐暗 */
    linear-gradient(to top, rgba(9, 10, 12, 0.85), transparent 42%),
    linear-gradient(165deg, #191c21, #0d0e11);
}
/* 极淡噪点（与全站同一套质感） */
.placeholder-art::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.05;
  mix-blend-mode: soft-light;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 180px 180px;
}

/* 编号 / 状态文字 */
.visual-index {
  position: absolute;
  top: 1.1rem;
  left: 1.2rem;
  z-index: 2;
  font-size: 0.68rem;
  letter-spacing: 0.24em;
  color: var(--brand-text);
}
.visual-caption {
  position: absolute;
  bottom: 1.1rem;
  left: 1.2rem;
  z-index: 2;
  font-size: 0.64rem;
  letter-spacing: 0.26em;
  color: var(--muted);
}

/* 四角取景框 */
.visual-corner {
  position: absolute;
  z-index: 3;
  width: 22px;
  height: 22px;
  border: 0 solid rgba(255, 255, 255, 0.4);
  pointer-events: none;
}
.visual-corner-tl { top: 12px; left: 12px; border-top-width: 1.5px; border-left-width: 1.5px; }
.visual-corner-tr { top: 12px; right: 12px; border-top-width: 1.5px; border-right-width: 1.5px; }
.visual-corner-bl { bottom: 12px; left: 12px; border-bottom-width: 1.5px; border-left-width: 1.5px; }
.visual-corner-br { bottom: 12px; right: 12px; border-bottom-width: 1.5px; border-right-width: 1.5px; }

/* 底部元信息 */
.visual-meta {
  display: flex;
  justify-content: space-between;
  margin-top: 0.8rem;
  font-size: 0.66rem;
  letter-spacing: 0.22em;
  color: var(--muted-dark);
}

/* ---------- 视觉容器入场（随 html.hero-in 只播一次，700~1000ms） ---------- */
html.hero-pending .hero-visual-frame,
html.hero-pending .hero-portrait,
html.hero-pending .visual-index,
html.hero-pending .visual-caption,
html.hero-pending .visual-corner,
html.hero-pending .visual-meta { opacity: 0; }

html.hero-in .hero-visual-frame {
  animation: visualFrameUp 0.8s var(--ease-spring) 0.22s both;
}
html.hero-in .hero-portrait {
  animation: visualUnveil 0.7s var(--ease-emphasized) 0.42s both;
}
html.hero-in .visual-corner { animation: visualCornerIn 0.4s var(--ease-emphasized) both; }
html.hero-in .visual-corner-tl { animation-delay: 0.78s; }
html.hero-in .visual-corner-tr { animation-delay: 0.85s; }
html.hero-in .visual-corner-bl { animation-delay: 0.92s; }
html.hero-in .visual-corner-br { animation-delay: 0.99s; }
html.hero-in .visual-index,
html.hero-in .visual-caption { animation: visualFadeUp 0.5s var(--ease-emphasized) 1.0s both; }
html.hero-in .visual-meta { animation: visualFadeUp 0.5s var(--ease-emphasized) 1.08s both; }

@keyframes visualFrameUp {
  from { opacity: 0; transform: translateY(34px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes visualUnveil {
  from { clip-path: inset(0 0 0 100%); }
  to   { clip-path: inset(0 0 0 0); }
}
@keyframes visualCornerIn {
  from { opacity: 0; transform: scale(0.4); }
  to   { opacity: 1; transform: scale(1); }
}
@keyframes visualFadeUp {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.hero-kicker {
  font-size: 0.74rem;
  letter-spacing: 0.3em;
  color: var(--muted-dark);
  margin-bottom: 1.1rem;
}

.hero-title {
  font-size: clamp(2.5rem, 6.8vw, 5.2rem);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: 0.005em;
  margin: 0 0 1.7rem;
  will-change: transform;
}
.hero-line { display: block; overflow: hidden; }
.hero-line-inner { display: inline-block; will-change: transform; }

/* 逐行裁切揭示：html.hero-pending 隐藏 → html.hero-in 逐行升起（JS 门控） */
html.hero-pending .hero-line-inner { transform: translateY(112%); }
html.hero-in .hero-line-inner {
  animation: heroLineUp 0.8s var(--ease-emphasized) both;
}
html.hero-in .hero-line:nth-child(1) .hero-line-inner { animation-delay: 0.05s; }
html.hero-in .hero-line:nth-child(2) .hero-line-inner { animation-delay: 0.17s; }
html.hero-in .hero-line:nth-child(3) .hero-line-inner { animation-delay: 0.29s; }
@keyframes heroLineUp {
  from { transform: translateY(112%); }
  to   { transform: translateY(0); }
}

/* 其余首屏元素跟随升起（scroll-hint 只动 opacity，避免覆盖居中定位的 translateX） */
html.hero-pending .hero-kicker,
html.hero-pending .hero-sub,
html.hero-pending .hero-cta {
  opacity: 0;
  transform: translateY(14px);
}
html.hero-pending .scroll-hint { opacity: 0; }
html.hero-in .hero-kicker,
html.hero-in .hero-sub,
html.hero-in .hero-cta {
  opacity: 1;
  transform: none;
  transition: opacity 0.7s var(--ease-emphasized), transform 0.7s var(--ease-emphasized);
}
html.hero-in .hero-kicker { transition-delay: 0.05s; }
html.hero-in .hero-sub { transition-delay: 0.42s; }
html.hero-in .hero-cta { transition-delay: 0.54s; }
html.hero-in .scroll-hint {
  opacity: 1;
  transition: opacity 0.8s var(--ease-emphasized) 0.8s;
}

.hl { color: var(--brand-text); font-style: normal; }

.hero-sub {
  max-width: 580px;
  color: var(--muted);
  font-size: clamp(1rem, 2vw, 1.13rem);
  will-change: transform;
}
.hero-sub strong { color: var(--text); font-weight: 650; }

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.95rem;
  margin-top: 2.5rem;
}

/* 轻量滚动提示：仅轻微上下浮动 */
.scroll-hint {
  position: absolute;
  left: 50%;
  bottom: 1.8rem;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
  color: var(--muted-dark);
  pointer-events: none;
}
.scroll-hint-text { font-size: 0.64rem; letter-spacing: 0.26em; }
.scroll-hint-arrow { font-size: 0.9rem; animation: hintFloat 2.8s ease-in-out infinite; }
@keyframes hintFloat {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(5px); }
}

.button {
  display: inline-flex;
  align-items: center;
  gap: 0.45em;
  padding: 0.85em 1.9em;
  border-radius: 10px;
  font-weight: 700;
  font-size: 1rem;
  min-height: 44px;
  transition: filter var(--duration-fast) var(--ease-standard),
    box-shadow var(--duration-fast) var(--ease-standard),
    border-color var(--duration-fast) var(--ease-standard),
    color var(--duration-fast) var(--ease-standard),
    transform var(--duration-fast) var(--ease-emphasized);
}
.button-primary {
  background: var(--brand);
  color: #fff;
  box-shadow: 0 12px 34px -12px var(--brand-glow);
}
.button-primary:hover { transform: translateY(-2px); filter: brightness(1.14); }
.button-ghost { border: 1px solid var(--border); color: var(--muted); }
.button-ghost:hover { border-color: var(--border-strong); color: var(--text); background: var(--surface-hover); }

/* ---------- 分区标题 ---------- */
.section-head { position: relative; padding-top: 0.3rem; }

.section-head h2 {
  display: flex;
  align-items: baseline;
  gap: 0.6em;
  font-size: clamp(1.7rem, 3.4vw, 2.4rem);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: 0.005em;
}

.sec-num { font-size: 0.62em; font-weight: 700; color: var(--brand-text); }

.section-desc { color: var(--muted); margin-top: 0.4rem; font-size: 0.94rem; }

.section-head.center { text-align: center; }
.section-head.center h2 { justify-content: center; }

.head-rule {
  width: 52px;
  height: 3px;
  background: var(--brand);
  margin-top: 0.7rem;
  border-radius: 2px;
  transform-origin: left;
}
.section-head.center .head-rule { margin-inline: auto; }
[data-reveal] .head-rule { transform: scaleX(0); transition: transform 0.7s var(--ease-emphasized) 0.25s; }
[data-reveal].revealed .head-rule { transform: scaleX(1); }

/* 入场揭示：仅第一次进入视口时播放（observer 播完即 unobserve） */
.has-reveal [data-reveal] {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.65s var(--ease-emphasized), transform 0.65s var(--ease-emphasized);
}
.has-reveal [data-reveal].revealed { opacity: 1; transform: none; }

/* ---------- 关于区：左右滑入（一次性，两侧 120ms 时间差） ---------- */
.slide-in-left, .slide-in-right {
  opacity: 0;
  transition: opacity 0.75s var(--ease-emphasized), transform 0.75s var(--ease-emphasized);
}
.slide-in-left { transform: translateX(-46px); }
.slide-in-right { transform: translateX(46px); transition-delay: 0.12s; }
.slide-in-left.visible, .slide-in-right.visible { opacity: 1; transform: none; }

/* ---------- 作品速览：作品手风琴（桌面横向 / 移动纵向） ---------- */
/* 桌面：横向排列，展开项以 flex-grow 放大，收起项为图片细条 + 竖排标题；
   移动端（<768px）转纵向堆叠。交互由 main.js 驱动：悬停 / 点按 / 方向键切换 */

.acc {
  display: flex;
  gap: 10px;
  margin-top: 1.6rem;
  height: clamp(340px, 52vh, 460px);
}

.acc-item {
  position: relative;
  flex: 1 1 0%;
  min-width: 0;
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  background: linear-gradient(160deg, var(--surface-raised), var(--bg-soft));
  border: 1px solid var(--border);
  transition:
    flex-grow 0.55s var(--ease-emphasized),
    border-color 0.3s var(--ease-standard),
    box-shadow 0.3s var(--ease-standard),
    height 0.55s var(--ease-emphasized);
}
.acc-item:focus-visible {
  outline: 2px solid var(--brand-text);
  outline-offset: 3px;
}
.acc-item.active {
  flex-grow: 5.2;
  cursor: default;
  border-color: rgba(255, 61, 70, 0.45);
  box-shadow: 0 26px 60px -24px rgba(0, 0, 0, 0.9);
}

/* 预览图：收起时略微压暗，展开时铺满并轻微推近 */
.acc-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.78;
  transition: opacity 0.4s var(--ease-standard), transform 0.6s var(--ease-emphasized);
}
.acc-item.active .acc-img { opacity: 1; transform: scale(1.03); }
.acc-item.img-failed .acc-img { display: none; }
.acc-item.img-failed::before {
  content: "PREVIEW 暂不可用";
  position: absolute;
  inset: 0;
  z-index: 1;
  display: grid;
  place-items: center;
  color: var(--muted-dark);
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  background: repeating-linear-gradient(45deg, transparent 0 12px, rgba(255, 255, 255, 0.025) 12px 24px);
}
/* 数据未填 preview 时的占位底图（div 形式，与 img 同位） */
.acc-img-empty {
  display: grid;
  place-items: center;
  color: var(--muted);
  font-size: 0.85rem;
  letter-spacing: 0.12em;
  background:
    repeating-linear-gradient(45deg, transparent 0 12px, rgba(255, 255, 255, 0.025) 12px 24px),
    linear-gradient(160deg, var(--surface-raised), var(--bg-soft));
}

/* 底部渐变遮罩：保证文字与按钮在任意预览图上可读 */
.acc-shade {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(8, 9, 11, 0.88) 0%,
    rgba(8, 9, 11, 0.46) 32%,
    rgba(8, 9, 11, 0.08) 60%,
    transparent 80%
  );
}

/* 徽标：分类（左上）+ 进度状态（右上），与旧卡片徽标同视觉 */
.acc-cat,
.acc-flag {
  position: absolute;
  top: 0.7rem;
  z-index: 3;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 0.16em 0.7em;
  border-radius: 999px;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  white-space: nowrap;
}
.acc-cat {
  left: 0.7rem;
  background: rgba(10, 10, 12, 0.72);
  border: 1px solid rgba(255, 255, 255, 0.35);
  color: #fff;
}
.acc-flag {
  right: 0.7rem;
  color: var(--status);
  background: rgba(10, 10, 12, 0.72);
  border: 1px dashed rgba(251, 191, 36, 0.55);
}

/* 收起项的竖排标题（桌面）；展开后让位给完整文字层 */
.acc-rail {
  position: absolute;
  left: 50%;
  bottom: 0.9rem;
  transform: translateX(-50%);
  writing-mode: vertical-rl;
  text-orientation: mixed;
  z-index: 2;
  font-size: 0.86rem;
  font-weight: 650;
  letter-spacing: 0.08em;
  color: var(--text-soft);
  white-space: nowrap;
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.85);
  pointer-events: none;
  opacity: 1;
  transition: opacity 0.25s var(--ease-standard);
}
.acc-item.active .acc-rail { opacity: 0; }

/* 展开文字层：标题 → 简介文字位 → 标签 → 跳转按钮，依次浮现 */
.acc-info {
  position: absolute;
  inset: auto 0 0 0;
  z-index: 2;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  padding: 1.1rem 1.25rem 1.2rem;
  opacity: 0;
  transform: translateY(14px);
  pointer-events: none;
  transition: opacity 0.28s var(--ease-standard), transform 0.28s var(--ease-standard);
}
.acc-item.active .acc-info {
  opacity: 1;
  transform: none;
  pointer-events: auto;
  transition: opacity 0.45s var(--ease-emphasized) 0.12s, transform 0.45s var(--ease-emphasized) 0.12s;
}

/* 子元素逐个浮现（等效参考实现的 staggerChildren） */
.acc-title,
.acc-desc,
.acc-tags,
.acc-actions,
.acc-info .links-pending {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.26s var(--ease-standard), transform 0.26s var(--ease-standard);
}
.acc-item.active .acc-title { opacity: 1; transform: none; transition-delay: 0.16s; }
.acc-item.active .acc-desc { opacity: 1; transform: none; transition-delay: 0.22s; }
.acc-item.active .acc-tags { opacity: 1; transform: none; transition-delay: 0.28s; }
.acc-item.active .acc-actions,
.acc-item.active .acc-info .links-pending { opacity: 1; transform: none; transition-delay: 0.34s; }

.acc-title {
  font-size: clamp(1.15rem, 1.9vw, 1.5rem);
  font-weight: 750;
  line-height: 1.35;
}

/* 简介文字位：预留约两行高度，description 暂空时布局依旧稳定 */
.acc-desc {
  color: var(--text-soft);
  font-size: 0.9rem;
  line-height: 1.6;
  min-height: 2.9em;
  max-width: 56ch;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.acc-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.8rem;
  list-style: none;
  font-size: 0.72rem;
  color: var(--muted);
}

.acc-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 0.35rem;
}
.acc-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.42em;
  font-size: 0.88rem;
  font-weight: 700;
  padding: 0.52em 1.25em;
  border-radius: 9px;
  white-space: nowrap;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.acc-btn-primary {
  background: var(--brand);
  color: #fff;
  box-shadow: 0 8px 24px -8px var(--brand-glow);
}
.acc-btn-primary:hover { filter: brightness(1.14); }
.acc-btn-ghost {
  border: 1px solid rgba(255, 255, 255, 0.4);
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
}
.acc-btn-ghost:hover { border-color: #fff; }

.links-pending {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--muted);
}

/* 首屏入场：与全站一致的升起节奏，逐面板交错 */
.acc-item.enter { animation: accIn 0.55s var(--ease-emphasized) backwards; }
@keyframes accIn {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: none; }
}

/* 动画冻结环境（anim-frozen，见 main.js 探针）：过渡时间轴不推进，
   手风琴展开完全依赖 transition，这里必须跳过过渡直接呈现最终状态 */
html.anim-frozen .acc-item,
html.anim-frozen .acc-img,
html.anim-frozen .acc-rail,
html.anim-frozen .acc-info,
html.anim-frozen .acc-title,
html.anim-frozen .acc-desc,
html.anim-frozen .acc-tags,
html.anim-frozen .acc-actions,
html.anim-frozen .acc-info .links-pending { transition: none !important; }
html.anim-frozen .acc-item.enter { animation: none !important; }

/* ---------- 移动端：纵向手风琴（展开项向下生长，收起为横条） ---------- */
@media (max-width: 768px) {
  .acc {
    flex-direction: column;
    height: auto;
    gap: 8px;
  }
  .acc-item {
    flex: none;
    height: 58px;
  }
  .acc-item.active {
    flex-grow: 1;
    height: min(62vh, 420px);
  }
  /* 收起条：横排标题靠左，分类徽标移到右侧避免重叠 */
  .acc-rail {
    writing-mode: horizontal-tb;
    left: 1rem;
    bottom: auto;
    top: 50%;
    transform: translateY(-50%);
  }
  .acc-cat {
    left: auto;
    right: 0.7rem;
    top: 50%;
    transform: translateY(-50%);
  }
  .acc-flag { top: 0.6rem; }
  .acc-info { padding: 1rem 1.1rem 1.1rem; }
  .acc-desc {
    -webkit-line-clamp: 3;
    min-height: 0;
  }
}

/* ---------- 统计数字行 ---------- */
.stats-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 1rem 1.6rem;
  padding-top: 0.6rem;
}
.stat { text-align: left; }
.stat b {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(2.3rem, 5vw, 3.4rem);
  font-weight: 800;
  line-height: 1;
  color: var(--brand-text);
  font-variant-numeric: tabular-nums;
}
.stat span {
  display: block;
  margin-top: 0.45rem;
  color: var(--muted);
  font-size: 0.88rem;
}


/* ---------- 关于区 ---------- */
/* 锚点跳转：扣除吸顶导航后的可用高度；内容放得下则可完整一屏展示，
   放不下（小高度窗口）时取消 min-height，保证标题与所有卡片完整可见 */
#about {
  min-height: calc(100svh - var(--header-h));
  scroll-margin-top: var(--header-h);
}

#showcase,
#contact {
  scroll-margin-top: var(--header-h);
}

.about.page-section {
  align-items: flex-start;
  padding-block: clamp(4.5rem, 7vh, 7rem);
}

@media (max-height: 760px) {
  #about {
    min-height: auto;
    padding-block: 5rem 3rem;
  }
}

.about-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(300px, 0.8fr);
  gap: 1.5rem;
  align-items: stretch;   /* 左右卡片底部对齐 */
}

/* 左侧滑入容器改为拉伸，使视觉卡片与右侧整体等高 */
.about-inner .slide-in-left,
.about-inner .slide-in-right { display: flex; flex-direction: column; }
.about-inner .slide-in-right { gap: 1.25rem; }
.about-inner .slide-in-right > * { flex: 1; }

.about-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: clamp(1.6rem, 3vw, 2.4rem);
}

.about-bio { flex: 0 0 auto; }
.about-bio p {
  color: var(--text);
  font-size: 1.05rem;
  line-height: 1.75;
  font-weight: 500;
  letter-spacing: 0.01em;
}

/* 左侧视觉卡片：与 Hero 视觉同一套设计语言（工作台/环境向抽象构图） */
.about-visual-card {
  position: relative;
  flex: 1;
  display: flex;
  flex-direction: column;
  background:
    radial-gradient(22rem 16rem at 18% 0%, rgba(230, 0, 8, 0.14), transparent 60%),
    linear-gradient(160deg, #17191d 0%, #101216 60%, #0b0c0f 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
/* 未来真实图片：object-fit 裁切，编号与底栏保留 */
.about-profile-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.about-visual-image {
  position: relative;
  flex: 1;
  min-height: 320px;
  overflow: hidden;
}

/* 抽象工作台构图：顶部灯下光锥 + 桌面横线 + 红色弧形点缀（纯 CSS） */
.about-placeholder-art {
  position: absolute;
  inset: 0;
  background:
    /* 灯下光锥 */
    conic-gradient(from 200deg at 24% -6%, transparent 0deg, rgba(255, 244, 230, 0.07) 16deg, transparent 34deg),
    /* 红色弧形（桌面物件剪影） */
    radial-gradient(11rem 11rem at 86% 88%, rgba(230, 0, 8, 0.22) 0 38%, transparent 39%),
    radial-gradient(11rem 11rem at 86% 88%, transparent 0 44%, rgba(230, 0, 8, 0.34) 44.5% 47%, transparent 47.5%),
    /* 桌面横向层次线 */
    repeating-linear-gradient(0deg, rgba(255, 255, 255, 0.024) 0 1px, transparent 1px 56px),
    /* 纵向细网格 */
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.02) 0 1px, transparent 1px 72px),
    linear-gradient(200deg, #191c21, #0c0d10);
}
.about-placeholder-art::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.05;
  mix-blend-mode: soft-light;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 180px 180px;
}

.about-visual-number {
  position: absolute;
  top: 1.1rem;
  left: 1.2rem;
  z-index: 2;
  font-size: 0.68rem;
  letter-spacing: 0.24em;
  color: var(--brand-text);
}

.about-visual-footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.95rem 1.25rem;
  border-top: 1px solid var(--border);
  font-size: 0.62rem;
  letter-spacing: 0.22em;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
}

/* 第三层：状态面板 */
.about-facts { border-top: 1px solid var(--border); }
.about-facts > div {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--border);
}
.about-facts dt { color: var(--muted); font-size: 0.9rem; }
.about-facts dd { font-weight: 600; font-size: 0.92rem; text-align: right; display: flex; align-items: center; gap: 0.5em; }
.fact-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #34d399;
  box-shadow: 0 0 8px rgba(52, 211, 153, 0.5);
}

/* ---------- 联系 ---------- */
.contact { text-align: center; }
.contact h2 {
  display: flex;
  justify-content: center;
  align-items: baseline;
  gap: 0.6em;
  font-size: clamp(1.9rem, 4.4vw, 2.9rem);
  font-weight: 900;
}
.contact .section-desc { justify-content: center; }
.contact .head-rule { margin-inline: auto; }

.email-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.7em;
  margin-top: 1.8rem;
  padding: 0.85em 1.8em;
  font-family: var(--font-mono);
  font-size: clamp(0.92rem, 1.6vw, 1.1rem);
  font-weight: 650;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  cursor: pointer;
  transition: color var(--duration-normal) var(--ease-standard),
    background var(--duration-normal) var(--ease-standard),
    border-color var(--duration-normal) var(--ease-standard),
    transform var(--duration-fast) var(--ease-emphasized),
    box-shadow var(--duration-normal) var(--ease-standard);
}
.email-btn svg { flex-shrink: 0; }
.email-btn .email-text { letter-spacing: 0.01em; }
/* 「点击复制」hover 时从右侧滑入；触屏常驻 */
.email-btn .email-action {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  font-size: 0.72em;
  font-weight: 500;
  opacity: 0;
  transform: translateX(-6px);
  margin-left: 0.35em;
  padding-left: 0.8em;
  border-left: 1px solid currentColor;
  transition: opacity var(--duration-normal) var(--ease-standard),
    transform var(--duration-normal) var(--ease-standard);
}
.email-btn:hover,
.email-btn:focus-visible { border-color: rgba(255, 61, 70, 0.55); transform: translateY(-2px); }
.email-btn:hover .email-action,
.email-btn:focus-visible .email-action { opacity: 0.9; transform: none; }
@media (hover: none) {
  .email-btn .email-action { opacity: 0.55; transform: none; }
}
.email-btn.copied {
  color: #4ade80;
  border-color: rgba(74, 222, 128, 0.55);
  background: rgba(34, 197, 94, 0.08);
}
.email-btn.copied .email-action { opacity: 0.95; transform: none; }
.email-btn.copy-failed {
  color: #f87171;
  border-color: rgba(248, 113, 113, 0.5);
}

.social-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 1.7rem;
}

.social-btn {
  font-family: inherit;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  font-size: 0.92rem;
  font-weight: 650;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.6em 1.25em;
  transition: color var(--duration-fast) var(--ease-standard),
    border-color var(--duration-fast) var(--ease-standard),
    background var(--duration-fast) var(--ease-standard),
    transform var(--duration-fast) var(--ease-emphasized);
}
.social-btn svg { flex-shrink: 0; transition: transform var(--duration-fast) var(--ease-emphasized); }
.social-btn:hover {
  color: var(--brand-text);
  border-color: rgba(255, 61, 70, 0.5);
  background: var(--surface);
  transform: translateY(-2px);
}
.social-btn:hover svg { transform: translateX(2px); }

/* ---------- 微信二维码弹窗 ---------- */
.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: grid;
  place-items: center;
  padding: 1.25rem;
  background: rgba(5, 6, 9, 0.72);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.modal-backdrop[hidden] { display: none; }

.modal-card {
  position: relative;
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem 1.5rem 1.25rem;
  width: min(360px, 92vw);
  text-align: center;
  box-shadow: 0 40px 100px -30px rgba(0, 0, 0, 0.9);
  animation: modalIn 0.32s var(--ease-emphasized) both;
}
@keyframes modalIn {
  from { opacity: 0; transform: translateY(18px) scale(0.97); }
  to   { opacity: 1; transform: none; }
}

.modal-qr {
  width: 100%;
  border-radius: 10px;
  background: #fff;
}

.modal-tip {
  margin-top: 0.9rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.modal-close {
  position: absolute;
  top: 0.55rem;
  right: 0.65rem;
  z-index: 1;
  width: 36px;
  height: 36px;
  border: 0;
  border-radius: 8px;
  background: rgba(10, 10, 12, 0.55);
  color: #fff;
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  transition: color var(--duration-fast) var(--ease-standard), background var(--duration-fast) var(--ease-standard);
}
.modal-close:hover { color: var(--brand-text); background: rgba(10, 10, 12, 0.8); }

/* ---------- 页脚 ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.8rem 0 2.2rem;
  color: var(--muted);
  font-size: 0.85rem;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
.to-top:hover { color: var(--brand-text); }

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
  /* Hero 上下布局：标题按钮在前，视觉容器在后（高度 280~420px，不消失） */
  .hero-layout { grid-template-columns: 1fr; gap: 2.75rem; }
  .hero-visual-frame {
    aspect-ratio: auto;
    height: clamp(280px, 46vh, 420px);
    max-height: none;
  }
  .about-inner { grid-template-columns: 1fr; gap: 1.25rem; }
  .about-visual-image { min-height: 240px; }
}

@media (max-width: 800px) {
  .about-inner { gap: 1.25rem; }
}

@media (max-width: 640px) {
  .nav-toggle { display: flex; }

  /* 移动端菜单：全屏抽屉 + 背景模糊 + 菜单项逐个出现 */
  .site-nav {
    position: fixed;
    inset: 0;
    z-index: 90;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    gap: 1.6rem;
    padding: 0 10%;
    background: rgba(9, 10, 12, 0.9);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.32s var(--ease-standard), visibility 0.32s;
  }
  .site-nav.open { opacity: 1; visibility: visible; }
  .site-nav a {
    font-size: 1.7rem;
    font-weight: 800;
    padding: 0;
    border: 0;
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.45s var(--ease-emphasized), transform 0.45s var(--ease-emphasized), color var(--duration-fast);
    transition-delay: 0s;
  }
  .site-nav a::after { content: none; }
  .site-nav.open a {
    opacity: 1;
    transform: none;
    transition-delay: calc(0.08s + var(--i, 0) * 0.07s), calc(0.08s + var(--i, 0) * 0.07s), 0s;
  }
  .nav-num { font-size: 0.8rem; }

  .hero { overflow: hidden; }
  .hero-cta .button { flex: 1; justify-content: center; }
  .scroll-hint { bottom: 1.2rem; }

  .stats-row { grid-template-columns: repeat(2, 1fr); }
}

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

  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }

  .intro-line, .intro-start, .intro-hello, .intro-sub,
  .hero-line-inner, .acc-item.enter, .modal-card,
  .hero-visual-frame, .hero-image-placeholder, .placeholder-art,
  .visual-index, .visual-caption, .visual-corner, .visual-meta { animation: none !important; opacity: 1 !important; transform: none !important; }

  html.hero-pending .hero-line-inner,
  html.hero-pending .hero-kicker,
  html.hero-pending .hero-sub,
  html.hero-pending .hero-cta,
  html.hero-pending .scroll-hint,
  html.hero-pending .hero-visual-frame,
  html.hero-pending .hero-image-placeholder,
  html.hero-pending .visual-index,
  html.hero-pending .visual-caption,
  html.hero-pending .visual-corner,
  html.hero-pending .visual-meta { opacity: 1 !important; transform: none !important; }

  .has-reveal [data-reveal] { opacity: 1 !important; transform: none !important; transition: none !important; }
  .slide-in-left, .slide-in-right { opacity: 1 !important; transform: none !important; transition: none !important; }

  .scroll-hint-arrow { animation: none !important; }
}

/* ---------- 动画冻结环境兜底（由 JS 探针触发）：强制一次性入场元素呈最终状态 ---------- */
html.anim-frozen .intro-hello, html.anim-frozen .intro-sub, html.anim-frozen .intro-start,
html.anim-frozen .hero-line-inner, html.anim-frozen .hero-kicker,
html.anim-frozen .hero-sub, html.anim-frozen .hero-cta, html.anim-frozen .scroll-hint,
html.anim-frozen .hero-visual-frame, html.anim-frozen .hero-image-placeholder,
html.anim-frozen .visual-index, html.anim-frozen .visual-caption,
html.anim-frozen .visual-corner, html.anim-frozen .visual-meta {
  animation: none !important;
  opacity: 1 !important;
  transform: none !important;
  filter: none !important;
  clip-path: none !important;
}
html.anim-frozen [data-reveal],
html.anim-frozen .slide-in-left,
html.anim-frozen .slide-in-right {
  opacity: 1 !important;
  transform: none !important;
  transition: none !important;
}