/* ==========================================================================
   黄海东 · 作品集 — 项目详情页「LinkFlow」视觉皮肤
   加载顺序：fonts.css → base.css → project.css → detail-flow.css
   本文件只改配色 / 字体 / 首屏结构，正文骨架仍由 project.css 提供。

   调色板（深绿系统）
     #1f2a1d 主文字 · 实心按钮      #2d3a2a 次级深绿
     #2a3827 按钮 hover            #4b5b47 正文绿
     #336443 标题主色              #85AB8B 标题强调 · LED
     #3d5638 首屏左下文案          #2d4228 左下按钮 hover
   ========================================================================== */

/* ══════════════════════════════════════════════════════════════════════
   01 · 设计令牌覆盖（仅详情页生效，不影响首页）
   ══════════════════════════════════════════════════════════════════════ */
:root {
  --flow-dark:   #1f2a1d;
  --flow-dark-2: #2d3a2a;
  --flow-dark-3: #2a3827;
  --flow-body:   #4b5b47;
  --flow-title:  #336443;
  --flow-accent: #85AB8B;
  --flow-deep:   #3d5638;
  --flow-deep-2: #2d4228;

  --bg:        #F6F7F3;
  --surface:   #FFFFFF;
  --surface-2: #F1F4EE;
  --ink:       #1f2a1d;
  --fg:        #4b5b47;
  --fg-soft:   #5d6d58;
  --muted:     #6f7f69;
  --muted-2:   #8d9c87;
  --soft:      #85AB8B;
  --line:      rgba(31, 42, 29, 0.12);
  --line-soft: rgba(31, 42, 29, 0.07);
  --line-mid:  rgba(31, 42, 29, 0.18);

  --led:      #85AB8B;
  --led-deep: #336443;

  --grad-on-light: linear-gradient(180deg, #1f2a1d 0%, #2d3a2a 52%, #4b5b47 100%);
  --grad-on-dark:  linear-gradient(180deg, #f4f8f4 0%, #d5e0d3 58%, #85AB8B 100%);

  --radius-sm:   14px;
  --radius-card: 24px;
  --radius-band: 32px;

  --font-sans: 'Neue Haas Grotesk Display Pro 55 Roman', 'Neue Haas Grotesk Text Pro',
               'Inter', 'Helvetica Neue', Helvetica, Arial, sans-serif;

  --shadow-sm: 0 1px 2px rgba(31, 42, 29, 0.05), 0 4px 14px -8px rgba(31, 42, 29, 0.14);
  --shadow-md: 0 2px 6px rgba(31, 42, 29, 0.06), 0 18px 40px -22px rgba(31, 42, 29, 0.30);
  --shadow-lg: 0 4px 12px rgba(31, 42, 29, 0.07), 0 32px 70px -30px rgba(31, 42, 29, 0.36);
}

html { background: #FFFFFF; }

body {
  font-family: var(--font-sans);
  background: #FFFFFF;
  color: var(--fg);
}

/* ══════════════════════════════════════════════════════════════════════
   02 · 首屏：Boomerang 视频底 + 玻璃导航 + 居中标语 + 两角信息
   ══════════════════════════════════════════════════════════════════════ */
.flow-hero {
  position: relative;
  width: 100%;
  min-height: 100vh;
  min-height: 100svh;
  overflow: hidden;
  /* 视频解码前的兜底色，避免首帧闪白 */
  background: #dbe4d8;
}

/* ── 视频 / 画布 ── */
.flow-boomerang {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.flow-boomerang__video,
.flow-boomerang__canvas,
.flow-boomerang__poster {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 非视频详情页使用项目静帧，经过柔化和降饱和处理，只作为氛围底 */
.flow-boomerang--still {
  background: #dbe4d8;
}

.flow-boomerang--still .flow-boomerang__poster {
  opacity: 0.78;
  filter: blur(2px) saturate(0.72) brightness(0.92);
  transform: scale(1.025);
}

/* canvas 默认隐藏，抓帧完成后由脚本切到 .is-ready */
.flow-boomerang__canvas { display: none; }
.flow-boomerang.is-ready .flow-boomerang__video { display: none; }
.flow-boomerang.is-ready .flow-boomerang__canvas { display: block; }

/* ── 上下压色 ──
   视频明暗随帧漂移（雾面偏亮、苔面偏暗），且 object-fit: cover 在不同比例下
   裁切出的画面完全不同。这里用两层固定渐变把「顶部品牌」与「底部文案」
   锁在可控明度上，保证任何一帧都读得清。 */
.flow-hero::before,
.flow-hero::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  z-index: 1;
  pointer-events: none;
}

.flow-hero::before {
  top: 0;
  height: 52%;
  background: linear-gradient(180deg,
    rgba(246, 247, 243, 0.86) 0%,
    rgba(246, 247, 243, 0.66) 42%,
    rgba(246, 247, 243, 0) 100%);
}

.flow-hero::after {
  bottom: 0;
  height: 46%;
  background: linear-gradient(180deg,
    rgba(17, 24, 16, 0) 0%,
    rgba(17, 24, 16, 0.34) 55%,
    rgba(17, 24, 16, 0.62) 100%);
}

/* ── 顶部导航 ── */
.flow-nav {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: calc(1rem + env(safe-area-inset-top)) max(1rem, env(safe-area-inset-right))
           1rem max(1rem, env(safe-area-inset-left));
}

.flow-brand {
  display: inline-flex;
  align-items: flex-start;
  gap: 0.15rem;
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--flow-dark-2);
}

.flow-brand sup {
  margin-top: 0.1em;
  font-size: 0.625rem;
  font-weight: 500;
  letter-spacing: 0;
  font-variant-numeric: tabular-nums;
}

/* ── 胶囊导航（lg 以上） ── */
.flow-pill {
  display: none;
  align-items: center;
  gap: 0.25rem;
  padding: 0.25rem 0.25rem 0.25rem 1.5rem;
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: 9999px;
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 2px rgba(31, 42, 29, 0.06);
}

.flow-pill__link {
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--flow-body);
  transition: color 0.2s var(--ease-snap, ease);
}

.flow-pill__link:hover { color: var(--flow-dark); }

.flow-pill__link.is-current {
  font-weight: 600;
  color: var(--flow-dark);
}

.flow-pill__cta {
  margin-left: 0.5rem;
  padding: 0.625rem 1.25rem;
  border-radius: 9999px;
  background: var(--flow-dark);
  color: #FFFFFF;
  font-size: 0.875rem;
  font-weight: 500;
  transition: background-color 0.2s var(--ease-snap, ease);
}

.flow-pill__cta:hover { background: var(--flow-dark-3); }

/* ── 右侧文字入口 + 汉堡 ── */
.flow-nav__right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--flow-dark-2);
}

.flow-nav__link {
  display: none;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  transition: opacity 0.2s var(--ease-snap, ease);
}

.flow-nav__link:hover { opacity: 0.8; }
.flow-nav__link svg { width: 1rem; height: 1rem; flex: none; }

.flow-burger {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: 9999px;
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: var(--flow-dark);
  transition: background-color 0.3s var(--ease-snap, ease);
}

.flow-burger:hover { background: rgba(255, 255, 255, 0.9); }

.flow-burger svg {
  position: absolute;
  width: 1.25rem;
  height: 1.25rem;
  transition: all 0.3s var(--ease-snap, ease);
}

.flow-burger .icon-menu  { opacity: 1; transform: rotate(0deg)    scale(1); }
.flow-burger .icon-close { opacity: 0; transform: rotate(-90deg)  scale(0.5); }
.flow-burger.is-open .icon-menu  { opacity: 0; transform: rotate(90deg) scale(0.5); }
.flow-burger.is-open .icon-close { opacity: 1; transform: rotate(0deg)  scale(1); }

/* ── 抽屉遮罩 ── */
.flow-scrim {
  position: fixed;
  inset: 0;
  z-index: 20;
  background: rgba(31, 42, 29, 0.4);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s var(--ease-snap, ease);
}

.flow-scrim.is-open { opacity: 1; pointer-events: auto; }

/* ── 抽屉本体 ── */
.flow-drawer {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  z-index: 20;
  width: 85%;
  max-width: 24rem;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  box-shadow: 0 25px 50px -12px rgba(31, 42, 29, 0.35);
  transform: translateX(100%);
  transition: transform 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}

.flow-drawer.is-open { transform: translateX(0); }

.flow-drawer__inner {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: calc(6rem + env(safe-area-inset-top)) 2rem calc(2rem + env(safe-area-inset-bottom));
}

.flow-drawer__links {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.flow-drawer__link {
  padding: 1rem 0;
  border-bottom: 1px solid rgba(31, 42, 29, 0.1);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--flow-dark);
  transform: translateX(2rem);
  opacity: 0;
  transition: transform 0.5s var(--ease-out, ease), opacity 0.5s var(--ease-out, ease);
  transition-delay: 0ms;
}

.flow-drawer.is-open .flow-drawer__link {
  transform: none;
  opacity: 1;
  transition-delay: calc(150ms + var(--i, 0) * 70ms);
}

.flow-drawer__cta {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 2rem;
  transform: translateX(2rem);
  opacity: 0;
  transition: transform 0.5s var(--ease-out, ease), opacity 0.5s var(--ease-out, ease);
  transition-delay: 0ms;
}

.flow-drawer.is-open .flow-drawer__cta {
  transform: none;
  opacity: 1;
  transition-delay: 400ms;
}

.flow-drawer__meta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--flow-dark-2);
}

.flow-drawer__meta svg { width: 1rem; height: 1rem; flex: none; }

.flow-drawer__btn {
  margin-top: 0.5rem;
  padding: 0.75rem 1.25rem;
  border-radius: 9999px;
  background: var(--flow-dark);
  color: #FFFFFF;
  font-size: 0.875rem;
  font-weight: 600;
  text-align: center;
  transition: background-color 0.2s var(--ease-snap, ease);
}

.flow-drawer__btn:hover { background: var(--flow-dark-3); }

body.is-menu-locked { overflow: hidden; }

/* ── 居中标语 ── */
.flow-hero__copy {
  position: relative;
  z-index: 10;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: calc(6rem + env(safe-area-inset-top)) 1rem 0;
  text-align: center;
}

.flow-hero__title {
  max-width: 64rem;
  font-weight: 400;
  font-size: 2rem;
  line-height: 1;
  letter-spacing: -0.035em;
  color: var(--flow-title);
  text-wrap: balance;
  text-shadow: 0 1px 16px rgba(246, 247, 243, 0.75);
}

.flow-hero__accent { color: var(--flow-accent); }

.flow-br { display: none; }

.flow-hero__lead {
  max-width: 28rem;
  margin: 1.5rem 0 0;
  padding: 0 0.5rem;
  font-size: 0.875rem;
  line-height: 1.65;
  color: var(--flow-body);
  /* 多层浅色描边：无论底下是浅台面还是深色机身都读得清 */
  text-shadow: 0 0 6px rgba(246, 247, 243, 0.95), 0 0 18px rgba(246, 247, 243, 0.9);
}

/* ── 首屏左下：分类 + 说明 + 双按钮 ── */
.flow-cta {
  position: absolute;
  left: 1rem;
  right: 1rem;
  bottom: 1.5rem;
  z-index: 10;
  max-width: 24rem;
}

.flow-cta__head {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.95);
}

.flow-cta__head svg { width: 1rem; height: 1rem; flex: none; }

.flow-cta__text {
  max-width: 20rem;
  margin: 0 0 1.5rem;
  font-size: 0.75rem;
  font-weight: 400;
  line-height: 1.65;
  color: rgba(255, 255, 255, 0.85);
}

.flow-cta__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
}

.flow-btn {
  padding: 0.625rem 1.25rem;
  border-radius: 9999px;
  background: #FFFFFF;
  color: var(--flow-dark);
  font-size: 0.875rem;
  font-weight: 600;
  box-shadow: var(--shadow-sm);
  transition: background-color 0.2s var(--ease-snap, ease);
}

.flow-btn:hover { background: rgba(255, 255, 255, 0.9); }

.flow-btn-ghost {
  font-size: 0.875rem;
  font-weight: 500;
  color: #FFFFFF;
  transition: opacity 0.2s var(--ease-snap, ease);
}

.flow-btn-ghost:hover { opacity: 0.8; }

/* ── 首屏右下：视频入口 ── */
.flow-video {
  position: absolute;
  right: 1.5rem;
  bottom: 2rem;
  z-index: 10;
  display: none;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.9);
}

.flow-video__play {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1.5rem;
  height: 1.5rem;
  border-radius: 9999px;
  background: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  transition: background-color 0.2s var(--ease-snap, ease);
}

.flow-video:hover .flow-video__play { background: rgba(255, 255, 255, 0.3); }

.flow-video__play svg {
  width: 0.75rem;
  height: 0.75rem;
  margin-left: 0.1rem;
  fill: #FFFFFF;
  color: #FFFFFF;
}

.flow-video__label { font-weight: 500; }
.flow-video__time { color: rgba(255, 255, 255, 0.6); }

/* ── 首屏入场（上电时序，纯 CSS） ── */
@keyframes flow-rise {
  from { opacity: 0; transform: translate3d(0, 18px, 0); }
  to   { opacity: 1; transform: none; }
}

.flow-anim {
  animation: flow-rise 0.9s cubic-bezier(0.16, 1, 0.3, 1) both;
  animation-delay: var(--ad, 0s);
}

/* ══════════════════════════════════════════════════════════════════════
   03 · 断点（对齐参考稿的 sm 640 / md 768 / lg 1024 / xl 1280）
   ══════════════════════════════════════════════════════════════════════ */
@media (min-width: 640px) {
  .flow-nav {
    padding: calc(1.5rem + env(safe-area-inset-top)) max(1.5rem, env(safe-area-inset-right))
             1.5rem max(1.5rem, env(safe-area-inset-left));
  }

  .flow-brand { font-size: 1.25rem; }

  .flow-nav__right { gap: 1.5rem; }
  .flow-nav__link { display: inline-flex; }

  .flow-hero__copy { padding-top: calc(7rem + env(safe-area-inset-top)); }
  .flow-hero__title { font-size: 2.25rem; }
  .flow-hero__lead { margin-top: 2rem; font-size: 1rem; }
  .flow-br { display: block; }

  .flow-cta { right: auto; left: 1.5rem; bottom: 2rem; }
  .flow-video { display: flex; }
}

@media (min-width: 768px) {
  .flow-nav {
    padding-left: max(2.5rem, env(safe-area-inset-left));
    padding-right: max(2.5rem, env(safe-area-inset-right));
  }

  .flow-brand { font-size: 1.5rem; }

  .flow-hero__copy { padding-top: calc(8rem + env(safe-area-inset-top)); }
  .flow-hero__title { font-size: 3rem; }
  .flow-hero__lead { font-size: 1.125rem; }

  .flow-cta { left: 2.5rem; bottom: 2.5rem; }
  .flow-video { right: 2.5rem; bottom: 2.5rem; }
}

@media (min-width: 1024px) {
  .flow-pill { display: flex; }
  .flow-burger { display: none; }
  .flow-scrim,
  .flow-drawer { display: none; }

  .flow-hero__title { font-size: 4rem; }
}

@media (min-width: 1280px) {
  .flow-hero__title { font-size: 4.5rem; }
}

/* 竖屏下 16:9 视频被横向裁掉大半，画面重心下移，
   让镜头中的主体（山脊 / 拱桥）落进可视区，而不是只剩一片雾 */
@media (max-width: 767px) {
  .flow-boomerang__video,
  .flow-boomerang__canvas,
  .flow-boomerang__poster { object-position: 50% 68%; }
}

/* 手机横屏 / 低矮视口：首屏不再强制满屏，避免文案与两角信息挤压 */
@media (max-height: 620px) and (max-width: 1023px) {
  .flow-hero { min-height: 0; }
  .flow-hero__copy { padding-top: calc(4.5rem + env(safe-area-inset-top)); }
  .flow-hero__title { font-size: 1.75rem; }
  .flow-hero__lead { margin-top: 1rem; font-size: 0.875rem; }
  .flow-cta { bottom: 1rem; }
  .flow-cta__text { display: none; }
  .flow-video { bottom: 1.25rem; }
}

/* ══════════════════════════════════════════════════════════════════════
   04 · 正文外壳：白色页面 → 圆角浅色分区，压住首屏底边
   ══════════════════════════════════════════════════════════════════════ */
.flow-body {
  position: relative;
  z-index: 10;
  margin-top: -2.5rem;
  padding-bottom: 1rem;
  border-radius: var(--radius-band) var(--radius-band) 0 0;
  background: var(--bg);
  box-shadow: 0 -18px 40px -30px rgba(31, 42, 29, 0.45);
}

.flow-body .container { max-width: 60rem; }

/* 规格表接在首屏之后，收紧顶部留白 */
.flow-body .project-detail { padding: 3.5rem 0 3rem; }

/* ══════════════════════════════════════════════════════════════════════
   05 · 正文细节：沿用 project.css 结构，替换配色与圆角语汇
   ══════════════════════════════════════════════════════════════════════ */

/* ── 规格表 ── */
.project-spec { border-top-color: var(--line-mid); }

.project-spec-item { border-bottom-color: var(--line-soft); }
.project-spec-item dt { color: var(--muted); }
.project-spec-item dd { color: var(--ink); }

/* ── 小节 ── */
.project-detail-section-title { color: var(--muted); }
.project-detail-section-title::before { color: var(--flow-accent); }
.project-detail-section-title::after { background: var(--line); }

.project-detail-section p { color: var(--fg); }
.project-detail-section li { color: var(--fg); border-bottom-color: var(--line-soft); }
.project-detail-section li::before { background: var(--flow-accent); }

/* ── 结论强调块：浅绿底 + 左侧深绿描边 ── */
.project-detail-highlight {
  border: 1px solid var(--line);
  border-left: 3px solid var(--flow-title);
  background: var(--surface);
  color: var(--ink);
}

/* ── 技术标签 ── */
.project-detail-tag {
  border-color: var(--line-mid);
  background: var(--surface);
  color: var(--fg);
}

.project-detail-tag.highlight {
  background: var(--flow-dark);
  border-color: var(--flow-dark);
  color: #FFFFFF;
}

/* ── 画廊 / 视频 ── */
.project-gallery img {
  border-color: var(--line);
  background: var(--surface-2);
}

.project-gallery img:hover { border-color: var(--line-mid); }

.detail-media {
  border-color: var(--line);
  background: var(--flow-dark);
}

.detail-media video { background: var(--flow-dark); }

.project-figure {
  border-color: var(--line);
  background: var(--surface);
}

/* ── 代码块：深绿皮肤 ── */
.code-block { background: #16201a; }
.code-header { border-bottom-color: #2b3a2c; background: #101a13; }
.code-filename { color: #9db3a2; }
.code-body pre { color: #dbe6dc; }
.code-body .keyword { color: #a9d3b0; }
.code-body .type    { color: #8fc7a5; }
.code-body .func    { color: #cfe3c4; }
.code-body .comment { color: #71856f; }
.code-body .string  { color: #b8d8a8; }
.code-body .number  { color: #e0c58a; }
.code-copy { border-color: #2b3a2c; color: #9db3a2; }
.code-copy:hover { color: #e6efe7; border-color: #4b5b47; background: rgba(230, 239, 231, 0.08); }
.code-copy.is-done { color: #b8d8a8; border-color: rgba(184, 216, 168, 0.5); }

/* ── 翻页器 ── */
.project-pager-link {
  border-color: var(--line);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

.project-pager-link:hover {
  border-color: var(--line-mid);
  background: #FFFFFF;
  box-shadow: var(--shadow-md);
}

.project-pager-label { color: var(--muted); }
.project-pager-name { color: var(--ink); }

/* ── 页脚：深绿收尾 ── */
.detail-footer {
  display: flex;
  justify-content: center;
  padding: 3rem max(1.25rem, env(safe-area-inset-right))
           calc(4rem + env(safe-area-inset-bottom))
           max(1.25rem, env(safe-area-inset-left));
  background: var(--flow-dark);
}

.detail-footer .btn-ghost--ink {
  border-color: rgba(255, 255, 255, 0.35);
  color: #FFFFFF;
}

.detail-footer .btn-ghost--ink:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.6);
}

/* ── 灯箱 / 刻度条：跟随新色板 ── */
.lightbox { background: rgba(20, 28, 19, 0.93); }
.fx-rail { background: rgba(255, 255, 255, 0.78); }

/* ══════════════════════════════════════════════════════════════════════
   06 · 小屏收边
   ══════════════════════════════════════════════════════════════════════ */
@media (max-width: 640px) {
  .flow-body { margin-top: -1.5rem; border-radius: 24px 24px 0 0; }
  .flow-body .project-detail { padding: 2.75rem 0 2.5rem; }
}

@media (max-width: 380px) {
  .flow-brand { font-size: 1rem; }
  .flow-hero__title { font-size: 1.75rem; }
  .flow-cta__text { font-size: 0.72rem; }
}

/* 无脚本 / 降低动效：首屏元素直接可见 */
@media (prefers-reduced-motion: reduce) {
  .flow-anim { animation: none; opacity: 1; transform: none; }
  .flow-drawer__link,
  .flow-drawer__cta { transition: none; }
}