/* ==========================================================================
   光屿影像 · 摄影作品集
   纯静态样式表：不引用任何外部字体或资源，全部使用系统字体
   ========================================================================== */

/* ---------- 基础变量 ---------- */
:root {
  --serif: "Songti SC", "SimSun", "Noto Serif SC", "Source Han Serif SC", Georgia, "Times New Roman", serif;
  --sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Heiti SC", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;

  --ink: #17171a;
  --ink-soft: #45454a;
  --muted: #8d8d86;
  --line: #e6e2da;
  --paper: #fbfaf8;
  --card: #ffffff;
  --shadow: 0 18px 44px rgba(22, 22, 24, 0.10);

  --chrome-h: 74px;
  --pad: 46px;
  --radius-card: 3px;
  --radius-btn: 14px;

  --ease: cubic-bezier(.22, .61, .36, 1);
}

/* ---------- 重置 ---------- */
* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

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

body {
  font-family: var(--sans);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body.mode-hero { overflow: hidden; }

img { max-width: 100%; }

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

a { color: inherit; text-decoration: none; }

::selection { background: #f4e8a8; color: #17171a; }

/* ==========================================================================
   顶栏
   ========================================================================== */
.chrome {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 60;
  height: var(--chrome-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--pad);
  color: #fff;
  transition: background-color .35s var(--ease), color .35s var(--ease), border-color .35s var(--ease);
  border-bottom: 1px solid transparent;
}

.brand { display: flex; align-items: baseline; gap: 12px; min-width: 0; }

.brand-cn {
  font-family: var(--serif);
  font-size: 20px;
  letter-spacing: .16em;
  white-space: nowrap;
}

.brand-en {
  font-size: 10px;
  letter-spacing: .26em;
  opacity: .72;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.chrome-actions { display: flex; gap: 12px; flex: none; }

/* 右上角两个圆角方形按钮（对应参考图 1） */
.icon-btn {
  width: 46px;
  height: 46px;
  border-radius: var(--radius-btn);
  display: grid;
  place-items: center;
  background: rgba(28, 28, 30, .42);
  border: 1px solid rgba(255, 255, 255, .24);
  color: #fff;
  backdrop-filter: blur(12px) saturate(1.2);
  -webkit-backdrop-filter: blur(12px) saturate(1.2);
  transition: background-color .25s var(--ease), transform .25s var(--ease), color .25s var(--ease), border-color .25s var(--ease);
}

.icon-btn:hover { background: rgba(20, 20, 22, .62); transform: translateY(-1px); }

.icon-btn:active { transform: translateY(0) scale(.97); }

.icon-btn svg { width: 22px; height: 22px; display: block; }

body.mode-grid .chrome {
  background: rgba(251, 250, 248, .88);
  color: var(--ink);
  border-bottom-color: var(--line);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

body.mode-grid .icon-btn {
  background: #fff;
  color: var(--ink);
  border-color: var(--line);
}

body.mode-grid .icon-btn:hover { background: #f4f1ec; }

/* ==========================================================================
   沉浸首页（对应参考图 1）
   ========================================================================== */
.stage {
  position: relative;
  height: 100vh;
  height: 100svh;
  overflow: hidden;
  background: #101014;
}

.stage-media { position: absolute; inset: 0; }

.stage-media img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity .9s var(--ease);
  will-change: opacity, transform;
}

.stage-media img.is-active {
  opacity: 1;
  animation: kenburns 26s ease-in-out infinite alternate;
}

@keyframes kenburns {
  from { transform: scale(1.02); }
  to   { transform: scale(1.13); }
}

.stage-scrim {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(8, 8, 12, .52) 0%, rgba(8, 8, 12, 0) 26%),
    linear-gradient(0deg, rgba(8, 8, 12, .62) 0%, rgba(8, 8, 12, .18) 30%, rgba(8, 8, 12, 0) 55%);
  pointer-events: none;
}

.stage-caption {
  position: absolute;
  left: var(--pad);
  right: var(--pad);
  bottom: 150px;
  max-width: 660px;
  color: #fff;
  text-shadow: 0 2px 18px rgba(0, 0, 0, .38);
  transition: opacity .45s var(--ease), transform .45s var(--ease);
}

.cap-kicker {
  margin: 0 0 14px;
  font-size: 11px;
  letter-spacing: .3em;
  opacity: .8;
}

.cap-title {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(28px, 4.2vw, 54px);
  font-weight: 400;
  line-height: 1.22;
  letter-spacing: .02em;
}

.cap-sub {
  margin: 14px 0 0;
  font-size: 13px;
  letter-spacing: .1em;
  opacity: .82;
}

/* 底部缩略图 dock（对应参考图 1） */
.dock {
  position: absolute;
  left: 50%;
  bottom: 30px;
  transform: translateX(-50%);
  max-width: calc(100% - 2 * var(--pad));
  padding: 9px;
  display: flex;
  gap: 9px;
  border-radius: 22px;
  background: rgba(238, 234, 228, .34);
  border: 1px solid rgba(255, 255, 255, .22);
  backdrop-filter: blur(16px) saturate(1.1);
  -webkit-backdrop-filter: blur(16px) saturate(1.1);
  box-shadow: 0 16px 40px rgba(0, 0, 0, .3);
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.dock::-webkit-scrollbar { display: none; }

.thumb {
  flex: none;
  width: 104px;
  height: 104px;
  padding: 0;
  border-radius: 13px;
  overflow: hidden;
  position: relative;
  background: rgba(255, 255, 255, .18);
  opacity: .74;
  transition: opacity .35s var(--ease), transform .35s var(--ease), box-shadow .35s var(--ease);
}

.thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }

.thumb:hover { opacity: 1; transform: translateY(-3px); }

.thumb.is-current {
  opacity: 1;
  box-shadow: 0 0 0 2px rgba(255, 255, 255, .95);
}

/* ==========================================================================
   作品网格（对应参考图 2）
   ========================================================================== */
.gallery {
  display: none;
  padding: calc(var(--chrome-h) + 46px) var(--pad) 0;
}

body.mode-grid .stage { display: none; }

body.mode-grid .gallery {
  display: block;
  animation: view-in .4s var(--ease) both;
}

body.mode-hero .stage { animation: view-in .4s var(--ease) both; }

@keyframes view-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.gallery-inner { max-width: 1280px; margin: 0 auto; }

.gallery-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 18px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line);
}

.sec-title {
  margin: 0;
  font-family: var(--serif);
  font-size: 30px;
  font-weight: 400;
  letter-spacing: .08em;
}

.sec-sub {
  margin: 8px 0 0;
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--muted);
}

.filters { display: flex; flex-wrap: wrap; gap: 8px; }

.chip-filter {
  padding: 7px 15px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: #fff;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--ink-soft);
  transition: background-color .25s var(--ease), color .25s var(--ease), border-color .25s var(--ease);
}

.chip-filter:hover { border-color: #cfc9bf; }

.chip-filter.is-active {
  background: var(--ink);
  border-color: var(--ink);
  color: #fff;
}

.grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 26px;
  padding: 34px 0 10px;
}

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  text-align: left;
  padding: 14px 14px 16px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  transition: transform .4s var(--ease), box-shadow .4s var(--ease), border-color .4s var(--ease), opacity .3s var(--ease);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: #dad4c9;
}

.card.is-hidden { display: none; }

.card-media {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: #f2efea;
}

.card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform .7s var(--ease);
}

.card:hover .card-media img { transform: scale(1.03); }

.card-body { display: flex; flex-direction: column; padding-top: 16px; }

.card-chip {
  align-self: flex-start;
  padding: 5px 12px;
  border-radius: 999px;
  font-size: 10.5px;
  letter-spacing: .16em;
  color: #2a2a26;
  background: #eee;
}

.card-title {
  margin: 14px 0 0;
  font-family: var(--serif);
  font-size: 21px;
  font-weight: 400;
  line-height: 1.42;
  letter-spacing: .01em;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 7px;
  margin-top: 16px;
  padding-top: 13px;
  border-top: 1px solid var(--line);
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--muted);
}

.card-meta svg { width: 12px; height: 12px; flex: none; opacity: .8; }

/* ---------- 关于我 / 页脚 ---------- */
.about {
  max-width: 720px;
  margin: 92px 0 0;
  padding-top: 46px;
  border-top: 1px solid var(--line);
}

.about h2 {
  margin: 0 0 18px;
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 400;
  letter-spacing: .1em;
}

.about p {
  margin: 0;
  white-space: pre-line;
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 2;
}

.socials { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 26px; }

.social-link {
  padding: 8px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 12.5px;
  letter-spacing: .1em;
  background: #fff;
  transition: background-color .25s var(--ease), color .25s var(--ease), border-color .25s var(--ease);
}

.social-link:hover { background: var(--ink); color: #fff; border-color: var(--ink); }

.foot {
  margin-top: 74px;
  padding: 26px 0 46px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: space-between;
  align-items: center;
}

/* ==========================================================================
   大图详情层
   ========================================================================== */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: none;
  grid-template-columns: minmax(0, 1fr) 360px;
  background: rgba(14, 14, 16, .95);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  color: #fff;
}

.lightbox.is-open { display: grid; animation: view-in .3s var(--ease) both; }

.lb-stage {
  position: relative;
  display: grid;
  place-items: center;
  padding: 60px 40px;
  min-height: 0;
}

.lb-stage img {
  max-width: 100%;
  max-height: calc(100vh - 120px);
  max-height: calc(100svh - 120px);
  object-fit: contain;
  box-shadow: 0 30px 70px rgba(0, 0, 0, .5);
}

.lb-side {
  padding: 92px 44px 60px 8px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  overflow-y: auto;
}

.lb-chip {
  align-self: flex-start;
  padding: 5px 12px;
  border-radius: 999px;
  font-size: 10.5px;
  letter-spacing: .16em;
  color: #2a2a26;
}

.lb-title {
  margin: 4px 0 0;
  font-family: var(--serif);
  font-size: 28px;
  font-weight: 400;
  line-height: 1.4;
}

.lb-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 11.5px;
  letter-spacing: .14em;
  color: rgba(255, 255, 255, .62);
}

.lb-text {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 2;
  color: rgba(255, 255, 255, .78);
  white-space: pre-line;
}

.lb-nav {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-top: 26px;
  border-top: 1px solid rgba(255, 255, 255, .16);
}

.lb-nav button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, .22);
  color: #fff;
  font-size: 12.5px;
  letter-spacing: .08em;
  transition: background-color .25s var(--ease);
}

.lb-nav button:hover { background: rgba(255, 255, 255, .12); }

.lb-count { font-size: 12px; letter-spacing: .18em; color: rgba(255, 255, 255, .5); }

.lb-close {
  position: absolute;
  top: 22px;
  right: 26px;
  z-index: 2;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: rgba(255, 255, 255, .1);
  border: 1px solid rgba(255, 255, 255, .2);
  color: #fff;
}

.lb-close:hover { background: rgba(255, 255, 255, .2); }

.lb-side { position: relative; }

/* ==========================================================================
   左下角的猫守卫
   ========================================================================== */
.cat-guardian {
  position: fixed;
  left: 20px;
  bottom: 0;
  width: 168px;
  z-index: 240;
  pointer-events: none;
  transition: opacity .5s var(--ease), transform .5s var(--ease), width .3s var(--ease);
}

/* 白色柔光底，保证黑线在深色照片上也看得清 */
.cat-guardian::before {
  content: "";
  position: absolute;
  inset: -14% -20% -8% -22%;
  z-index: -1;
  background: radial-gradient(closest-side, rgba(255, 255, 255, .94), rgba(255, 255, 255, .5) 62%, rgba(255, 255, 255, 0) 100%);
  transition: opacity .35s var(--ease);
}

body.mode-grid .cat-guardian::before { opacity: .86; }

.cat-guardian svg { width: 100%; height: auto; display: block; overflow: visible; }

/* 参考图里那团蓝色柔光蝴蝶（装饰） */
.cat-glow {
  position: absolute;
  left: 8%;
  top: -34%;
  width: 46%;
  opacity: .82;
  animation: glow-pulse 6.5s ease-in-out infinite;
}

.cat-glow svg { filter: blur(5px) drop-shadow(0 0 16px rgba(122, 178, 236, .75)); }

@keyframes glow-pulse {
  0%, 100% { opacity: .58; transform: scale(.97); }
  50%      { opacity: .9;  transform: scale(1.04); }
}

/* ==========================================================================
   跟随鼠标的蝴蝶
   ========================================================================== */
.butterfly-host {
  position: fixed;
  left: 0;
  top: 0;
  width: 92px;
  height: 88px;
  margin: -44px 0 0 -46px;
  z-index: 260;
  pointer-events: none;
  opacity: 0;
  transition: opacity .35s var(--ease);
}

.butterfly-host.is-live { opacity: 1; }

.butterfly-tilt { width: 100%; height: 100%; }

.butterfly-host svg { width: 100%; height: 100%; display: block; overflow: visible; }

.butterfly-host .wing { transform-box: view-box; transform-origin: 80px 92px; animation: wing-flap var(--flap, .22s) ease-in-out infinite alternate; }

.butterfly-host .wing-right { animation-name: wing-flap-r; }

@keyframes wing-flap {
  from { transform: scaleX(1); }
  to   { transform: scaleX(.26); }
}

@keyframes wing-flap-r {
  from { transform: scaleX(1); }
  to   { transform: scaleX(.26); }
}

/* ==========================================================================
   轻提示
   ========================================================================== */
.lb-open { overflow: hidden; }

body.lb-open .cat-guardian { opacity: .42; }

.toast {
  position: fixed;
  left: 50%;
  bottom: 36px;
  transform: translate(-50%, 16px);
  z-index: 300;
  padding: 11px 20px;
  border-radius: 999px;
  background: rgba(24, 24, 26, .9);
  color: #fff;
  font-size: 13px;
  letter-spacing: .06em;
  opacity: 0;
  pointer-events: none;
  transition: opacity .3s var(--ease), transform .3s var(--ease);
}

.toast.is-show { opacity: 1; transform: translate(-50%, 0); }

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width: 1180px) {
  .grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 900px) {
  :root { --pad: 26px; --chrome-h: 66px; }
  .grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
  .lightbox { grid-template-columns: 1fr; grid-template-rows: minmax(0, 1fr) auto; }
  .lb-stage { padding: 66px 20px 12px; }
  .lb-side { padding: 20px 26px 34px; gap: 12px; }
  .lb-nav { margin-top: 12px; }
  .cat-guardian { width: 126px; left: 10px; }
  .thumb { width: 84px; height: 84px; }
  .dock { bottom: 20px; border-radius: 18px; }
  .stage-caption { bottom: 126px; }
}

@media (max-width: 620px) {
  :root { --pad: 18px; }
  .brand-en { display: none; }
  .icon-btn { width: 42px; height: 42px; }
  .grid { grid-template-columns: 1fr; gap: 18px; padding-top: 26px; }
  .stage-caption { bottom: 112px; max-width: none; }
  .cap-kicker { font-size: 10px; letter-spacing: .22em; }
  .thumb { width: 68px; height: 68px; border-radius: 11px; }
  .dock { padding: 7px; gap: 7px; border-radius: 16px; }
  .about { margin-top: 60px; }
  .cat-guardian { width: 98px; left: 5px; }
}

/* 屏幕特别小或高度很矮时，藏起猫，避免挡住内容 */
@media (max-width: 420px), (max-height: 520px) {
  .cat-guardian { opacity: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .stage-media img.is-active { animation: none; }
  .cat-glow { animation: none; }
  .butterfly-host, .butterfly-host .wing { animation-duration: .5s; }
}