/* ============================================================
   Kelantan · 摄影作品站 —— 暗调主题
   ============================================================ */
:root {
  --bg: #0a0a0c;
  --bg-soft: #101014;
  --panel: #141419;
  --line: rgba(255, 255, 255, 0.09);
  --line-strong: rgba(255, 255, 255, 0.18);
  --text: #ece9e2;
  --text-dim: #a09d95;
  --text-faint: #6c6a66;
  --gold: #c9a46b;
  --gold-soft: rgba(201, 164, 107, 0.16);
  --danger: #d96a5a;
  --serif: "Cormorant Garamond", "Playfair Display", Georgia, "Songti SC", "SimSun", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
  line-height: 1.6;
  overflow-x: hidden;
}
::selection { background: var(--gold-soft); color: var(--gold); }
img { display: block; }
a { color: inherit; text-decoration: none; }
kbd {
  font-family: var(--sans);
  font-size: 0.72em;
  border: 1px solid var(--line-strong);
  border-bottom-width: 2px;
  border-radius: 4px;
  padding: 1px 6px;
  color: var(--text-dim);
  background: rgba(255, 255, 255, 0.03);
}
.skip-link {
  position: fixed; left: 12px; top: -60px; z-index: 200;
  background: var(--gold); color: #101014; padding: 8px 16px;
  border-radius: 6px; transition: top 0.2s;
}
.skip-link:focus { top: 12px; }

/* ---------------- 顶栏 ---------------- */
.topbar {
  position: fixed; inset: 0 0 auto 0; z-index: 90;
  display: flex; align-items: center; justify-content: space-between;
  padding: 22px clamp(20px, 4vw, 56px);
  background: linear-gradient(to bottom, rgba(10, 10, 12, 0.86), rgba(10, 10, 12, 0));
  backdrop-filter: blur(2px);
}
.brand {
  font-family: var(--serif);
  font-size: 21px; letter-spacing: 0.42em; text-indent: 0.42em;
  color: var(--text);
  transition: color 0.25s;
}
.brand:hover { color: var(--gold); }
.topbar-link {
  font-size: 12px; letter-spacing: 0.22em;
  color: var(--text-faint); text-transform: uppercase;
  border: 1px solid var(--line);
  padding: 6px 14px; border-radius: 999px;
  transition: all 0.25s;
}
.topbar-link:hover { color: var(--text); border-color: var(--line-strong); }

/* ---------------- 视图切换 ---------------- */
.view { min-height: 100vh; }
.view-home { position: relative; }

/* ---------------- 首页 hero ---------------- */
.hero {
  min-height: 88vh;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  text-align: center;
  padding: 9vh 24px 0;
}
.hero-title {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(58px, 12vw, 168px);
  letter-spacing: 0.32em; text-indent: 0.32em;
  line-height: 1.02;
  background: linear-gradient(180deg, #f6f1e6 30%, #b9b29f 90%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
  animation: fadeUp 1.1s var(--ease) both;
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(52% 40% at 50% 36%, rgba(201, 164, 107, 0.07), transparent 70%),
    radial-gradient(30% 26% at 82% 78%, rgba(120, 140, 190, 0.05), transparent 70%);
  pointer-events: none;
}
.hero-title, .hero-sub, .hero-sub-en { position: relative; }
.hero-sub {
  margin-top: clamp(18px, 3.4vh, 40px);
  font-size: clamp(14px, 1.6vw, 18px);
  letter-spacing: 0.5em; text-indent: 0.5em;
  color: var(--text-dim);
  animation: fadeUp 1.1s 0.18s var(--ease) both;
}
.hero-sub-en {
  margin-top: 12px;
  font-family: var(--serif);
  font-size: clamp(11px, 1.1vw, 13px);
  letter-spacing: 0.66em; text-indent: 0.66em;
  color: var(--text-faint);
  animation: fadeUp 1.1s 0.34s var(--ease) both;
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: none; }
}
.home-scroll-hint {
  text-align: center; color: var(--text-faint);
  font-size: 12px; letter-spacing: 0.3em;
  margin: -30px 0 56px;
  animation: breathe 2.6s ease-in-out infinite;
}
@keyframes breathe {
  0%, 100% { opacity: 0.35; }
  50% { opacity: 1; }
}

/* ---------------- 分类墙 ---------------- */
.categories-wrap {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 clamp(20px, 4vw, 56px) 80px;
}
.section-label {
  font-family: var(--serif);
  font-size: 13px; font-weight: 500;
  letter-spacing: 0.5em; text-indent: 0.5em;
  color: var(--gold);
  margin-bottom: 26px;
}
.section-label::after {
  content: ""; display: inline-block; width: 56px; height: 1px;
  background: var(--line-strong); vertical-align: middle; margin-left: 18px;
}
.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: clamp(14px, 1.6vw, 22px);
}
.cat-card {
  position: relative;
  aspect-ratio: 4 / 5;
  border-radius: 6px;
  overflow: hidden;
  background: var(--panel);
  border: 1px solid var(--line);
  transition: transform 0.55s var(--ease), border-color 0.4s;
  display: block;
}
.cat-card:hover { transform: translateY(-6px); border-color: var(--gold); }
.cat-card:focus-visible { outline: 2px solid var(--gold); outline-offset: 3px; }
.cat-cover { position: absolute; inset: 0; }
.cat-cover img {
  width: 100%; height: 100%; object-fit: cover;
  filter: brightness(0.72) saturate(0.92);
  transform: scale(1.02);
  transition: transform 1.2s var(--ease), filter 0.8s;
}
.cat-card:hover .cat-cover img { transform: scale(1.09); filter: brightness(0.9) saturate(1); }
.cat-cover::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(6, 6, 8, 0.88) 0%, rgba(6, 6, 8, 0.12) 46%, rgba(6, 6, 8, 0.05) 100%);
}
.cat-placeholder {
  position: absolute; inset: 0;
  background:
    linear-gradient(155deg, rgba(255, 255, 255, 0.028), rgba(255, 255, 255, 0.004) 55%),
    radial-gradient(90% 70% at 50% 0%, rgba(201, 164, 107, 0.09), transparent 65%),
    var(--panel);
}
.cat-placeholder .ph-name {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--serif);
  font-size: clamp(30px, 3.4vw, 44px);
  letter-spacing: 0.2em; text-indent: 0.2em;
  color: var(--text);
  text-shadow: 0 2px 30px rgba(0, 0, 0, 0.4);
}
.cat-label {
  position: absolute; left: 0; right: 0; bottom: 0;
  padding: 26px 22px 20px;
}
.cat-label .cn {
  font-family: var(--serif);
  font-size: clamp(22px, 2.2vw, 28px);
  letter-spacing: 0.14em;
}
.cat-label .en-count {
  margin-top: 6px;
  font-size: 11px; letter-spacing: 0.34em;
  color: rgba(236, 233, 226, 0.62);
}
.empty-note {
  text-align: center;
  padding: 70px 20px;
  color: var(--text-dim);
  letter-spacing: 0.1em;
}
.empty-note .dim { margin-top: 10px; font-size: 13px; color: var(--text-faint); }
.empty-note a { color: var(--gold); border-bottom: 1px solid rgba(201, 164, 107, 0.4); }
.empty-note a:hover { border-color: var(--gold); }

/* ---------------- 相册页 ---------------- */
.view-gallery {
  padding: clamp(104px, 14vh, 150px) clamp(16px, 3vw, 44px) 60px;
  max-width: 1680px;
  margin: 0 auto;
}
.gallery-head { text-align: center; margin-bottom: 46px; }
.back-btn {
  position: absolute; left: clamp(20px, 3vw, 40px); top: clamp(86px, 12vh, 116px);
  background: none; border: 1px solid var(--line); color: var(--text-dim);
  font-size: 12px; letter-spacing: 0.14em;
  padding: 8px 16px; border-radius: 999px; cursor: pointer;
  transition: all 0.25s;
}
.back-btn:hover { color: var(--text); border-color: var(--line-strong); }
.gallery-name {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(34px, 5vw, 58px);
  letter-spacing: 0.24em; text-indent: 0.24em;
}
.gallery-desc { margin-top: 10px; color: var(--text-dim); font-size: 14px; letter-spacing: 0.18em; }
.gallery-meta {
  margin-top: 8px; font-size: 11px; letter-spacing: 0.3em;
  color: var(--text-faint);
}
.kb-hint { margin-top: 18px; font-size: 12px; color: var(--text-faint); }
.kb-hint kbd { margin: 0 1px; }

/* 瀑布流 */
.masonry { display: flex; gap: clamp(12px, 1.4vw, 18px); align-items: flex-start; }
.m-col { display: flex; flex-direction: column; gap: clamp(12px, 1.4vw, 18px); flex: 1 1 0; min-width: 0; }
.photo-cell {
  position: relative;
  border-radius: 4px; overflow: hidden;
  background: var(--panel);
  border: 1px solid transparent;
  cursor: zoom-in;
  transition: border-color 0.3s;
}
.photo-cell:hover { border-color: var(--line-strong); }
.photo-cell img {
  width: 100%; height: auto;
  transition: transform 0.9s var(--ease);
}
.photo-cell:hover img { transform: scale(1.035); }
.photo-cap {
  position: absolute; left: 0; right: 0; bottom: 0;
  padding: 34px 14px 12px;
  font-size: 12.5px; letter-spacing: 0.06em;
  color: rgba(236, 233, 226, 0.92);
  background: linear-gradient(to top, rgba(5, 5, 7, 0.82), transparent);
  opacity: 0; transform: translateY(6px);
  transition: opacity 0.35s, transform 0.35s;
  pointer-events: none;
}
.photo-cell:hover .photo-cap { opacity: 1; transform: none; }
.photo-cell .cap-date { font-size: 10.5px; color: rgba(236, 233, 226, 0.55); margin-top: 2px; }
.photo-err {
  display: flex; align-items: center; justify-content: center;
  min-height: 120px; color: var(--text-faint); font-size: 12px;
}
.photo-cell:focus-visible { outline: 2px solid var(--gold); outline-offset: 2px; }

/* ---------------- 页脚 ---------------- */
.footer {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px; flex-wrap: wrap;
  padding: 34px clamp(20px, 4vw, 56px);
  border-top: 1px solid var(--line);
  color: var(--text-faint);
  font-size: 12px; letter-spacing: 0.18em;
}
.footer-brand {
  font-family: var(--serif);
  letter-spacing: 0.4em; color: var(--text-dim);
}
.view-gallery + .footer { display: none; }

/* ---------------- 全屏灯箱 ---------------- */
.lightbox {
  position: fixed; inset: 0; z-index: 150;
  background: rgba(4, 4, 5, 0.97);
  display: flex; align-items: center; justify-content: center;
  animation: lbFade 0.3s ease both;
}
@keyframes lbFade { from { opacity: 0; } to { opacity: 1; } }
.lb-canvas {
  position: relative; display: flex; align-items: center; justify-content: center;
  width: 100%; height: 100%;
}
.lb-img {
  max-width: 100%; max-height: 100%;
  width: auto; height: auto;
  object-fit: contain;
  opacity: 0;
  transition: opacity 0.4s ease;
  user-select: none;
}
.lb-img.is-loaded { opacity: 1; }
.lb-loading {
  position: absolute; color: var(--text-faint);
  font-size: 12px; letter-spacing: 0.3em;
  animation: breathe 1.4s infinite;
}
.lb-close {
  position: absolute; top: 20px; right: 24px;
  width: 44px; height: 44px; border-radius: 50%;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--line-strong);
  color: var(--text); font-size: 16px; cursor: pointer;
  transition: all 0.25s; z-index: 2;
}
.lb-close:hover { background: var(--gold); border-color: var(--gold); color: #101014; }
.lb-nav {
  position: absolute; top: 50%; transform: translateY(-50%);
  width: 54px; height: 90px;
  background: none; border: none; cursor: pointer;
  color: rgba(236, 233, 226, 0.6); font-size: 40px; line-height: 1;
  opacity: 0; transition: opacity 0.25s, color 0.25s;
  z-index: 2;
}
.lightbox:hover .lb-nav, .lb-nav:focus-visible { opacity: 1; }
.lb-prev { left: clamp(6px, 2vw, 28px); }
.lb-next { right: clamp(6px, 2vw, 28px); }
.lb-nav:hover { color: var(--gold); }
.lb-info {
  position: absolute; left: 50%; bottom: 0;
  transform: translateX(-50%);
  width: 100%;
  text-align: center;
  padding: 46px 30px 26px;
  background: linear-gradient(to top, rgba(4, 4, 5, 0.92) 20%, transparent);
  z-index: 1;
  pointer-events: none;
}
.lb-title-row { display: flex; align-items: center; justify-content: center; gap: 14px; }
.lb-title {
  font-family: var(--serif);
  font-size: clamp(15px, 1.8vw, 19px);
  letter-spacing: 0.14em;
  color: var(--text);
}
.lb-index { font-size: 11px; color: var(--text-faint); letter-spacing: 0.2em; }
.lb-gear { margin-top: 8px; font-size: 12.5px; color: var(--text-dim); letter-spacing: 0.12em; }
.lb-gear span { margin: 0 7px; color: var(--text-faint); }
.lb-cam { margin-top: 3px; font-size: 12px; color: var(--text-faint); letter-spacing: 0.1em; }
.lb-date { margin-top: 4px; font-size: 11px; color: var(--text-faint); letter-spacing: 0.16em; }
body.lb-open { overflow: hidden; }

/* ---------------- 首屏提示 ---------------- */
.first-hint {
  position: fixed; left: 50%; bottom: 34px; transform: translateX(-50%);
  z-index: 120;
  display: flex; align-items: center; gap: 10px;
  background: rgba(20, 20, 25, 0.92);
  border: 1px solid var(--line-strong);
  backdrop-filter: blur(8px);
  color: var(--text-dim);
  font-size: 12.5px; letter-spacing: 0.12em;
  padding: 10px 20px; border-radius: 999px;
  animation: fadeUp 0.6s var(--ease) both;
  pointer-events: none;
}
.first-hint .key {
  color: var(--gold); border: 1px solid rgba(201, 164, 107, 0.5);
  border-bottom-width: 2px; border-radius: 4px; padding: 0 7px;
}
.first-hint.is-hide { opacity: 0; transform: translate(-50%, 10px); transition: all 0.5s; }

/* ---------------- 响应式 ---------------- */
@media (max-width: 720px) {
  .topbar { padding: 16px 18px; }
  .brand { font-size: 17px; letter-spacing: 0.34em; text-indent: 0.34em; }
  .hero { min-height: 86vh; padding-top: 12vh; }
  .hero-sub { letter-spacing: 0.24em; text-indent: 0.24em; line-height: 2; }
  .back-btn { position: static; margin-bottom: 18px; display: inline-block; }
  .gallery-head { text-align: center; }
  .lb-nav { width: 46px; font-size: 30px; opacity: 0.55; }
  .first-hint { bottom: 20px; white-space: nowrap; font-size: 11.5px; }
}
@media (max-width: 460px) {
  .categories-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
}