/* ========================================
   SPACE VISION - 空间影像
   专业空间建筑摄影作品集
   样式表 v1.0
   ======================================== */

/* ===== CSS 变量 ===== */
:root {
  --color-bg: #ffffff;
  --color-text: #2a2a2a;
  --color-text-light: #888888;
  --color-text-lighter: #b0b0b0;
  --color-border: #e8e8e8;
  --color-bg-gray: #f7f7f7;
  --color-bg-dark: #1a1a1a;
  --color-black: #000000;
  --color-white: #ffffff;
  --color-accent: #2a2a2a;
  --color-overlay: rgba(0, 0, 0, 0.35);
  --color-overlay-dark: rgba(0, 0, 0, 0.85);

  --font-sans: "Noto Sans SC", "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-serif: "Noto Serif SC", "Songti SC", serif;

  --header-height: 72px;
  --content-max-width: 1280px;
  --content-narrow-width: 860px;

  --transition-fast: 0.2s ease;
  --transition-base: 0.35s ease;
  --transition-slow: 0.6s ease;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-text-light);
}

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

ul {
  list-style: none;
}

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

/* ===== 工具类 ===== */
.container {
  width: 100%;
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: 0 40px;
}

.container-narrow {
  max-width: var(--content-narrow-width);
}

.section {
  padding: 100px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-title {
  font-size: 28px;
  font-weight: 300;
  letter-spacing: 2px;
  color: var(--color-text);
  margin-bottom: 12px;
}

.section-subtitle {
  font-size: 14px;
  color: var(--color-text-light);
  letter-spacing: 1px;
}

/* ===== 顶部导航 ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  z-index: 1000;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background var(--transition-base), border-color var(--transition-base), height var(--transition-fast);
}

.site-header.scrolled,
.site-header.solid {
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom-color: var(--color-border);
  height: 64px;
}

.site-header.transparent-light {
  background: transparent;
  border-bottom-color: transparent;
}

.site-header.transparent-light .nav-menu a,
.site-header.transparent-light .logo,
.site-header.transparent-light .nav-toggle span {
  color: #ffffff;
}

.site-header.transparent-light .nav-toggle span,
.site-header.transparent-light .nav-toggle span::before,
.site-header.transparent-light .nav-toggle span::after {
  background: #ffffff;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  padding: 0 40px;
  max-width: var(--content-max-width);
  margin: 0 auto;
}

.logo {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 1px;
  color: var(--color-text);
  transition: color var(--transition-fast);
}

.logo span {
  font-weight: 300;
  font-size: 12px;
  color: var(--color-text-light);
  letter-spacing: 2px;
  margin-left: 6px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 40px;
}

.nav-menu a {
  font-size: 14px;
  color: var(--color-text);
  letter-spacing: 0.5px;
  position: relative;
  padding: 6px 0;
  transition: color var(--transition-fast);
}

.nav-menu a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-text);
  transition: width var(--transition-base);
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  width: 30px;
  height: 30px;
  position: relative;
  cursor: pointer;
}

.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  display: block;
  position: absolute;
  height: 1px;
  width: 22px;
  background: var(--color-text);
  transition: all var(--transition-fast);
}

.nav-toggle span {
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.nav-toggle span::before {
  content: "";
  top: -7px;
  left: 0;
}

.nav-toggle span::after {
  content: "";
  top: 7px;
  left: 0;
}

.nav-toggle.active span {
  background: transparent;
}

.nav-toggle.active span::before {
  top: 0;
  transform: rotate(45deg);
}

.nav-toggle.active span::after {
  top: 0;
  transform: rotate(-45deg);
}

/* ===== 首页 Hero ===== */
.hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--color-bg-dark);
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.9;
  animation: heroFadeIn 1.5s ease forwards;
}

@keyframes heroFadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 0.9;
  }
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to bottom, rgba(0, 0, 0, 0.3) 0%, rgba(0, 0, 0, 0.15) 50%, rgba(0, 0, 0, 0.45) 100%);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: #ffffff;
  padding: 0 20px;
  animation: heroContentIn 1.2s ease 0.3s both;
}

@keyframes heroContentIn {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-name {
  font-size: 42px;
  font-weight: 200;
  letter-spacing: 6px;
  margin-bottom: 16px;
  line-height: 1.3;
}

.hero-name-en {
  display: block;
  font-size: 14px;
  letter-spacing: 8px;
  font-weight: 300;
  margin-top: 8px;
  opacity: 0.8;
}

.hero-slogan {
  font-size: 16px;
  font-weight: 300;
  letter-spacing: 3px;
  opacity: 0.85;
  margin-bottom: 40px;
}

.hero-divider {
  width: 40px;
  height: 1px;
  background: rgba(255, 255, 255, 0.5);
  margin: 0 auto 40px;
}

.hero-cta {
  display: inline-block;
  padding: 12px 36px;
  border: 1px solid rgba(255, 255, 255, 0.6);
  font-size: 13px;
  letter-spacing: 2px;
  color: #ffffff;
  transition: all var(--transition-base);
}

.hero-cta:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: #ffffff;
  color: #ffffff;
}

.scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  color: rgba(255, 255, 255, 0.6);
  font-size: 12px;
  letter-spacing: 2px;
  text-align: center;
  animation: bounce 2s ease infinite;
}

.scroll-indicator::after {
  content: "";
  display: block;
  width: 1px;
  height: 30px;
  background: rgba(255, 255, 255, 0.3);
  margin: 12px auto 0;
}

@keyframes bounce {
  0%,
  100% {
    transform: translateX(-50%) translateY(0);
  }
  50% {
    transform: translateX(-50%) translateY(8px);
  }
}

/* ===== 精选作品（首页） ===== */
.featured-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.featured-item {
  position: relative;
  overflow: hidden;
  cursor: pointer;
  background: var(--color-bg-gray);
  aspect-ratio: 4 / 3;
}

.featured-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s ease;
}

.featured-item:hover img {
  transform: scale(1.03);
}

.featured-item::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.5) 0%, transparent 60%);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.featured-item:hover::after {
  opacity: 1;
}

.featured-info {
  position: absolute;
  bottom: 20px;
  left: 20px;
  z-index: 2;
  color: #ffffff;
  opacity: 0;
  transform: translateY(10px);
  transition: all var(--transition-base);
}

.featured-item:hover .featured-info {
  opacity: 1;
  transform: translateY(0);
}

.featured-info h3 {
  font-size: 15px;
  font-weight: 400;
  margin-bottom: 4px;
}

.featured-info p {
  font-size: 12px;
  opacity: 0.8;
}

/* ===== 简介（首页） ===== */
.intro-section {
  background: var(--color-bg);
  text-align: center;
}

.intro-text {
  font-size: 16px;
  line-height: 2;
  color: var(--color-text);
  max-width: 680px;
  margin: 0 auto;
  font-weight: 300;
}

.intro-stats {
  display: flex;
  justify-content: center;
  gap: 80px;
  margin-top: 60px;
}

.intro-stat {
  text-align: center;
}

.intro-stat-num {
  font-size: 36px;
  font-weight: 200;
  color: var(--color-text);
}

.intro-stat-label {
  font-size: 13px;
  color: var(--color-text-light);
  letter-spacing: 1px;
  margin-top: 8px;
}

/* ===== 数字滚动条 ===== */
.marquee-section {
  background: var(--color-bg-dark);
  padding: 24px 0;
  overflow: hidden;
}

.marquee {
  display: flex;
  gap: 60px;
  animation: marqueeScroll 30s linear infinite;
  white-space: nowrap;
}

.marquee-item {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.5);
  letter-spacing: 2px;
  font-weight: 300;
}

@keyframes marqueeScroll {
  from {
    transform: translateX(0);
  }
  to {
    transform: translateX(-50%);
  }
}

/* ===== 页面横幅（非首页） ===== */
.page-banner {
  padding-top: calc(var(--header-height) + 80px);
  padding-bottom: 60px;
  text-align: center;
  background: var(--color-bg);
}

.page-banner h1 {
  font-size: 36px;
  font-weight: 200;
  letter-spacing: 4px;
  color: var(--color-text);
  margin-bottom: 16px;
}

.page-banner p {
  font-size: 14px;
  color: var(--color-text-light);
  letter-spacing: 1px;
}

/* ===== 作品集筛选 ===== */
.portfolio-filter {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0;
  margin-bottom: 48px;
  border-bottom: 1px solid var(--color-border);
}

.filter-btn {
  padding: 14px 32px;
  font-size: 14px;
  color: var(--color-text-light);
  letter-spacing: 1px;
  position: relative;
  transition: color var(--transition-fast);
}

.filter-btn:hover {
  color: var(--color-text);
}

.filter-btn.active {
  color: var(--color-text);
}

.filter-btn.active::after {
  content: "";
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--color-text);
}

.filter-count {
  font-size: 11px;
  color: var(--color-text-lighter);
  margin-left: 4px;
}

/* ===== 瀑布流 ===== */
.masonry {
  column-count: 3;
  column-gap: 20px;
}

.masonry-item {
  break-inside: avoid;
  margin-bottom: 20px;
  position: relative;
  cursor: pointer;
  overflow: hidden;
  background: var(--color-bg-gray);
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.masonry-item.loaded {
  opacity: 1;
  transform: translateY(0);
}

.masonry-item img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.6s ease;
}

.masonry-item:hover img {
  transform: scale(1.02);
}

.masonry-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.4);
  opacity: 0;
  display: flex;
  align-items: flex-end;
  padding: 24px;
  transition: opacity var(--transition-base);
}

.masonry-item:hover .masonry-overlay {
  opacity: 1;
}

.masonry-overlay-content {
  color: #fff;
}

.masonry-overlay-content h3 {
  font-size: 15px;
  font-weight: 400;
  margin-bottom: 4px;
}

.masonry-overlay-content span {
  font-size: 12px;
  opacity: 0.7;
  letter-spacing: 1px;
}

/* ===== Lightbox 大图预览 ===== */
.lightbox {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 2000;
  background: var(--color-overlay-dark);
  display: none;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.lightbox.open {
  display: flex;
  opacity: 1;
}

.lightbox-content {
  position: relative;
  max-width: 90vw;
  max-height: 90vh;
}

.lightbox-img {
  max-width: 90vw;
  max-height: 85vh;
  object-fit: contain;
  display: block;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.lightbox-loading {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: rgba(255, 255, 255, 0.5);
  font-size: 14px;
  letter-spacing: 2px;
}

.lightbox-caption {
  position: absolute;
  bottom: -48px;
  left: 0;
  width: 100%;
  text-align: center;
  color: rgba(255, 255, 255, 0.7);
  font-size: 13px;
  letter-spacing: 1px;
}

.lightbox-caption span {
  display: block;
  font-size: 11px;
  opacity: 0.6;
  margin-top: 4px;
}

.lightbox-close {
  position: fixed;
  top: 24px;
  right: 32px;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 2001;
  color: rgba(255, 255, 255, 0.8);
  font-size: 28px;
  transition: color var(--transition-fast);
}

.lightbox-close:hover {
  color: #ffffff;
}

.lightbox-nav {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 2001;
  color: rgba(255, 255, 255, 0.6);
  font-size: 32px;
  transition: color var(--transition-fast);
  user-select: none;
}

.lightbox-nav:hover {
  color: #ffffff;
}

.lightbox-prev {
  left: 24px;
}

.lightbox-next {
  right: 24px;
}

body.lightbox-open {
  overflow: hidden;
}

/* ===== 关于页面 ===== */
.about-hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  margin-bottom: 80px;
}

.about-portrait {
  aspect-ratio: 4 / 5;
  background: var(--color-bg-gray);
  overflow: hidden;
}

.about-portrait img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.about-intro h2 {
  font-size: 28px;
  font-weight: 300;
  margin-bottom: 8px;
  letter-spacing: 1px;
}

.about-intro .about-role {
  font-size: 14px;
  color: var(--color-text-light);
  letter-spacing: 2px;
  margin-bottom: 24px;
}

.about-intro p {
  font-size: 15px;
  line-height: 2;
  color: var(--color-text);
  margin-bottom: 16px;
  font-weight: 300;
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.service-card {
  border: 1px solid var(--color-border);
  padding: 40px 32px;
  text-align: center;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
  background: var(--color-bg);
}

.service-card:hover {
  border-color: var(--color-text);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
}

.service-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.service-icon svg {
  width: 100%;
  height: 100%;
  stroke: var(--color-text);
  fill: none;
  stroke-width: 1;
}

.service-card h3 {
  font-size: 17px;
  font-weight: 400;
  margin-bottom: 12px;
  letter-spacing: 1px;
}

.service-card p {
  font-size: 13px;
  color: var(--color-text-light);
  line-height: 1.8;
}

.equipment-section {
  background: var(--color-bg-gray);
}

.equipment-list {
  max-width: 720px;
  margin: 0 auto;
}

.equipment-item {
  display: flex;
  align-items: center;
  padding: 20px 0;
  border-bottom: 1px solid var(--color-border);
}

.equipment-item:last-child {
  border-bottom: none;
}

.equipment-label {
  width: 100px;
  font-size: 13px;
  color: var(--color-text-light);
  letter-spacing: 1px;
  flex-shrink: 0;
}

.equipment-value {
  font-size: 14px;
  color: var(--color-text);
  font-weight: 400;
}

.equipment-value span {
  display: block;
  font-size: 12px;
  color: var(--color-text-light);
  margin-top: 2px;
}

/* ===== 联系页面 ===== */
.contact-section {
  padding: 60px 0 40px;
}

.contact-info {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

.contact-card {
  text-align: left;
}

.contact-card h3 {
  font-size: 16px;
  font-weight: 400;
  letter-spacing: 1px;
  margin-bottom: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}

.contact-detail {
  font-size: 15px;
  color: var(--color-text);
  margin-bottom: 8px;
  font-weight: 300;
}

.contact-detail a {
  border-bottom: 1px solid var(--color-border);
  transition: border-color var(--transition-fast);
}

.contact-detail a:hover {
  border-color: var(--color-text);
}

.contact-note {
  font-size: 13px;
  color: var(--color-text-light);
  margin-top: 8px;
  line-height: 1.8;
}

.qr-placeholder {
  width: 160px;
  height: 160px;
  background: var(--color-bg-gray);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 20px;
  border: 1px solid var(--color-border);
  position: relative;
  overflow: hidden;
}

.qr-placeholder::before {
  content: "QR Code";
  font-size: 12px;
  color: var(--color-text-lighter);
  letter-spacing: 1px;
}

.cooperation-section {
  background: var(--color-bg-gray);
}

.cooperation-list {
  max-width: 720px;
  margin: 0 auto;
}

.cooperation-item {
  display: flex;
  gap: 24px;
  padding: 28px 0;
  border-bottom: 1px solid var(--color-border);
}

.cooperation-item:last-child {
  border-bottom: none;
}

.cooperation-num {
  font-size: 24px;
  font-weight: 200;
  color: var(--color-text-lighter);
  flex-shrink: 0;
  width: 40px;
}

.cooperation-item h4 {
  font-size: 15px;
  font-weight: 500;
  margin-bottom: 6px;
  letter-spacing: 0.5px;
}

.cooperation-item p {
  font-size: 13px;
  color: var(--color-text-light);
  line-height: 1.8;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--color-bg-dark);
  color: rgba(255, 255, 255, 0.6);
  padding: 60px 0 30px;
  text-align: center;
}

.footer-logo {
  font-size: 18px;
  font-weight: 300;
  letter-spacing: 4px;
  color: #ffffff;
  margin-bottom: 12px;
}

.footer-logo span {
  font-size: 11px;
  letter-spacing: 3px;
  opacity: 0.5;
  display: block;
  margin-top: 4px;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 32px;
  margin: 24px 0;
}

.footer-links a {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
  letter-spacing: 1px;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: #ffffff;
}

.footer-copyright {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.3);
  letter-spacing: 0.5px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

/* ===== 回到顶部 ===== */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 44px;
  height: 44px;
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 900;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  font-size: 20px;
  color: var(--color-text);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background: var(--color-text);
  color: #ffffff;
  border-color: var(--color-text);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .container {
    padding: 0 32px;
  }

  .header-inner {
    padding: 0 32px;
  }

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

  .masonry {
    column-count: 2;
  }

  .about-hero {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .about-portrait {
    max-width: 400px;
    margin: 0 auto;
  }

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

  .contact-info {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .intro-stats {
    gap: 40px;
  }

  .section {
    padding: 80px 0;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 20px;
  }

  .header-inner {
    padding: 0 20px;
  }

  .nav-toggle {
    display: block;
  }

  .nav-menu {
    position: fixed;
    top: 0;
    right: 0;
    width: 100%;
    height: 100vh;
    background: var(--color-bg);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 32px;
    transform: translateX(100%);
    transition: transform var(--transition-base);
    z-index: 999;
  }

  .nav-menu.open {
    transform: translateX(0);
  }

  .nav-menu a {
    font-size: 18px;
    letter-spacing: 2px;
  }

  .nav-menu a::after {
    display: none;
  }

  .hero-name {
    font-size: 28px;
    letter-spacing: 4px;
  }

  .hero-name-en {
    font-size: 12px;
    letter-spacing: 5px;
  }

  .hero-slogan {
    font-size: 13px;
    letter-spacing: 2px;
  }

  .hero-cta {
    padding: 10px 28px;
    font-size: 12px;
  }

  .featured-grid {
    grid-template-columns: 1fr;
  }

  .masonry {
    column-count: 1;
  }

  .service-grid {
    grid-template-columns: 1fr;
  }

  .intro-stats {
    gap: 24px;
  }

  .intro-stat-num {
    font-size: 28px;
  }

  .page-banner h1 {
    font-size: 28px;
    letter-spacing: 3px;
  }

  .section {
    padding: 60px 0;
  }

  .section-header {
    margin-bottom: 40px;
  }

  .section-title {
    font-size: 24px;
  }

  .filter-btn {
    padding: 12px 20px;
    font-size: 13px;
  }

  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
  }

  .lightbox-nav {
    width: 36px;
    height: 36px;
    font-size: 24px;
  }

  .lightbox-prev {
    left: 8px;
  }

  .lightbox-next {
    right: 8px;
  }

  .lightbox-close {
    top: 16px;
    right: 20px;
  }

  .equipment-item {
    flex-direction: column;
    gap: 4px;
  }

  .equipment-label {
    width: auto;
  }
}

@media (max-width: 480px) {
  .hero-name {
    font-size: 22px;
  }

  .hero-slogan {
    font-size: 12px;
  }

  .filter-btn {
    padding: 10px 16px;
    font-size: 12px;
  }

  .section-title {
    font-size: 20px;
    letter-spacing: 1px;
  }
}

/* ===== 可访问性 ===== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}