/* ============================================================
   拾光人像 — 样式表
   设计基调：画廊 · 深色 · 温暖 · 编辑感
   主色：暖墨黑 / 纸白 / 低饱和青铜
   ============================================================ */

/* ---------- CSS 变量 ---------- */
:root {
  --color-ink:        #171310;
  --color-ink-soft:   #1F1A15;
  --color-ink-line:   rgba(237, 230, 218, 0.10);
  --color-paper:      #EDE6DA;
  --color-paper-dim:  #B9AE9E;
  --color-paper-faint:#8A8072;
  --color-bronze:     #C9A87C;
  --color-bronze-deep:#A3845C;

  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
  --font-serif: "Noto Serif SC", "Source Han Serif SC", "STSong", "Songti SC", Georgia, "Times New Roman", serif;

  --max-width: 1200px;
  --nav-height: 68px;

  --radius: 2px;

  --shadow-lb: 0 24px 80px rgba(0, 0, 0, 0.6);

  --transition-fast: 180ms ease;
  --transition-base: 320ms cubic-bezier(0.22, 1, 0.36, 1);
}

/* ---------- 全局重置 ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-height) + 16px);
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-paper);
  background: var(--color-ink);
  -webkit-font-smoothing: antialiased;
}

img {
  display: block;
  max-width: 100%;
}

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

ul {
  list-style: none;
}

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

.container {
  width: min(var(--max-width), 100% - 48px);
  margin-inline: auto;
}

/* 可访问性：键盘焦点 */
:focus-visible {
  outline: 2px solid var(--color-bronze);
  outline-offset: 3px;
}

/* ---------- 顶部导航 ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  height: var(--nav-height);
  transition: background var(--transition-base), border-color var(--transition-base);
  border-bottom: 1px solid transparent;
}

.site-header.scrolled {
  background: rgba(23, 19, 16, 0.85);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom-color: var(--color-ink-line);
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  letter-spacing: 0.35em;
  text-indent: 0.35em;
  color: var(--color-paper);
}

.main-nav {
  display: flex;
}

.nav-list {
  display: flex;
  gap: 40px;
}

.nav-link {
  position: relative;
  font-size: 0.9rem;
  letter-spacing: 0.18em;
  color: var(--color-paper-dim);
  padding: 8px 0;
  transition: color var(--transition-fast);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 2px;
  width: 100%;
  height: 1px;
  background: var(--color-bronze);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

.nav-link:hover {
  color: var(--color-paper);
}

.nav-link:hover::after {
  transform: scaleX(1);
}

/* 移动端菜单 */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 10px 4px;
}

.menu-bar {
  width: 22px;
  height: 2px;
  background: var(--color-paper);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.menu-toggle.open .menu-bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle.open .menu-bar:nth-child(2) { opacity: 0; }
.menu-toggle.open .menu-bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- 首屏引言 ---------- */
.intro {
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: calc(var(--nav-height) + 40px) 24px 80px;
}

.intro-kicker {
  font-size: 0.78rem;
  letter-spacing: 0.5em;
  color: var(--color-bronze);
  margin-bottom: 28px;
}

.intro-title {
  font-family: var(--font-serif);
  font-size: clamp(2.6rem, 7vw, 5.2rem);
  font-weight: 500;
  line-height: 1.25;
  letter-spacing: 0.08em;
}

.intro-accent {
  color: var(--color-bronze);
  font-style: italic;
}

.intro-sub {
  margin-top: 32px;
  max-width: 30em;
  color: var(--color-paper-dim);
  font-size: 1.02rem;
  line-height: 2;
}

.intro-scroll {
  margin-top: 72px;
  display: inline-flex;
  align-items: center;
  gap: 14px;
  font-size: 0.8rem;
  letter-spacing: 0.35em;
  color: var(--color-paper-faint);
  transition: color var(--transition-fast);
}

.intro-scroll:hover {
  color: var(--color-bronze);
}

.scroll-line {
  width: 44px;
  height: 1px;
  background: var(--color-bronze-deep);
  position: relative;
  overflow: hidden;
}

.scroll-line::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--color-bronze);
  animation: scrollPulse 2.4s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%   { transform: translateX(-100%); }
  60%  { transform: translateX(0); }
  100% { transform: translateX(100%); }
}

/* ---------- 作品画廊 ---------- */
.works {
  padding: 96px 0 120px;
  border-top: 1px solid var(--color-ink-line);
}

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 36px;
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
  font-weight: 500;
  letter-spacing: 0.2em;
  display: flex;
  align-items: baseline;
  gap: 14px;
}

.section-title-en {
  font-size: 0.72rem;
  letter-spacing: 0.4em;
  color: var(--color-paper-faint);
  font-family: var(--font-sans);
}

.demo-note {
  font-size: 0.8rem;
  color: var(--color-paper-faint);
  letter-spacing: 0.08em;
}

/* 筛选按钮 */
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 44px;
}

.filter-btn {
  padding: 8px 20px;
  font-size: 0.85rem;
  letter-spacing: 0.15em;
  color: var(--color-paper-dim);
  border: 1px solid var(--color-ink-line);
  border-radius: 999px;
  transition: color var(--transition-fast), border-color var(--transition-fast), background var(--transition-fast);
}

.filter-btn:hover {
  color: var(--color-paper);
  border-color: var(--color-paper-faint);
}

.filter-btn.active {
  color: var(--color-ink);
  background: var(--color-bronze);
  border-color: var(--color-bronze);
}

/* 瀑布流网格 */
.gallery {
  columns: 3;
  column-gap: 20px;
}

.photo-card {
  break-inside: avoid;
  margin-bottom: 20px;
  position: relative;
  overflow: hidden;
  background: var(--color-ink-soft);
  cursor: zoom-in;
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.photo-card.in {
  opacity: 1;
  transform: none;
}

.photo-card img {
  width: 100%;
  transition: transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
}

.photo-card:hover img {
  transform: scale(1.04);
}

/* 悬停信息条 */
.photo-info {
  position: absolute;
  inset: auto 0 0 0;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 40px 18px 14px;
  background: linear-gradient(to top, rgba(10, 8, 6, 0.75), transparent);
  opacity: 0;
  transform: translateY(8px);
  transition: opacity var(--transition-base), transform var(--transition-base);
}

.photo-card:hover .photo-info,
.photo-card:focus-within .photo-info {
  opacity: 1;
  transform: none;
}

.photo-title {
  font-family: var(--font-serif);
  font-size: 0.98rem;
  letter-spacing: 0.15em;
}

.photo-year {
  font-size: 0.72rem;
  color: var(--color-bronze);
  letter-spacing: 0.15em;
  flex-shrink: 0;
}

/* ---------- 关于 ---------- */
.about {
  padding: 110px 0;
  border-top: 1px solid var(--color-ink-line);
  background: var(--color-ink-soft);
}

.about-inner {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 64px;
}

.about-years {
  margin-top: 18px;
  font-size: 0.8rem;
  letter-spacing: 0.3em;
  color: var(--color-paper-faint);
}

.about-text {
  font-family: var(--font-serif);
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  line-height: 2.2;
  color: var(--color-paper-dim);
  max-width: 42em;
}

.about-text + .about-text {
  margin-top: 24px;
}

.about-name {
  color: var(--color-paper);
}

.about-years-inline {
  color: var(--color-bronze);
  font-style: italic;
}

/* ---------- 联系 ---------- */
.contact {
  padding: 120px 0;
}

.contact-inner {
  text-align: center;
}

.contact-mail {
  display: inline-block;
  margin-top: 36px;
  font-family: var(--font-serif);
  font-size: clamp(1.3rem, 3vw, 1.9rem);
  letter-spacing: 0.06em;
  color: var(--color-paper);
  border-bottom: 1px solid var(--color-bronze-deep);
  padding-bottom: 6px;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.contact-mail:hover {
  color: var(--color-bronze);
  border-color: var(--color-bronze);
}

.contact-socials {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 36px;
  margin-top: 44px;
}

.contact-social {
  font-size: 0.88rem;
  letter-spacing: 0.2em;
  color: var(--color-paper-dim);
  transition: color var(--transition-fast);
}

.contact-social:hover {
  color: var(--color-bronze);
}

/* ---------- 页脚 ---------- */
.site-footer {
  padding: 40px 0;
  border-top: 1px solid var(--color-ink-line);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  color: var(--color-paper-faint);
}

/* ---------- 灯箱 ---------- */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(10, 8, 6, 0.92);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  padding: 40px 80px;
}

.lightbox[hidden] {
  display: none;
}

.lightbox-stage {
  max-width: min(1080px, 100%);
  max-height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
}

.lightbox-stage img {
  max-width: 100%;
  max-height: calc(100vh - 160px);
  object-fit: contain;
  box-shadow: var(--shadow-lb);
}

.lightbox-caption {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 18px;
  font-size: 0.85rem;
  letter-spacing: 0.12em;
}

.lb-title {
  font-family: var(--font-serif);
  font-size: 1rem;
  color: var(--color-paper);
}

.lb-meta {
  color: var(--color-paper-dim);
}

.lb-count {
  color: var(--color-paper-faint);
}

.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 56px;
  height: 56px;
  font-size: 2rem;
  color: var(--color-paper-dim);
  border: 1px solid var(--color-ink-line);
  border-radius: 50%;
  transition: color var(--transition-fast), border-color var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox-nav:hover {
  color: var(--color-bronze);
  border-color: var(--color-bronze-deep);
}

.lightbox-prev { left: 20px; }
.lightbox-next { right: 20px; }

.lightbox-close {
  position: absolute;
  top: 18px;
  right: 24px;
  font-size: 2.2rem;
  line-height: 1;
  color: var(--color-paper-dim);
  padding: 8px;
  transition: color var(--transition-fast);
}

.lightbox-close:hover {
  color: var(--color-bronze);
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .gallery { columns: 2; }
}

@media (max-width: 760px) {
  .gallery { columns: 2; column-gap: 12px; }
  .photo-card { margin-bottom: 12px; }

  .menu-toggle { display: flex; }

  .main-nav {
    position: fixed;
    inset: var(--nav-height) 0 auto 0;
    background: var(--color-ink);
    border-bottom: 1px solid var(--color-ink-line);
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-fast), transform var(--transition-fast), visibility var(--transition-fast);
  }

  .main-nav.open {
    transform: none;
    opacity: 1;
    visibility: visible;
  }

  .nav-list {
    flex-direction: column;
    gap: 0;
    padding: 12px 24px 20px;
  }

  .nav-link {
    display: block;
    padding: 14px 0;
    border-bottom: 1px solid var(--color-ink-line);
  }

  .about-inner {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .lightbox {
    padding: 24px 16px;
  }

  .lightbox-stage img {
    max-height: calc(100vh - 180px);
  }

  .lightbox-prev { left: 8px; }
  .lightbox-next { right: 8px; }
}

/* 小屏单列 */
@media (max-width: 480px) {
  .gallery { columns: 1; }
}

/* ---------- 动画降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .photo-card { transition: none; }
  .photo-card.in { opacity: 1; transform: none; }
  .scroll-line::after { animation: none; }
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}