/* ========================================
   Zi&Ta 之桃工坊 — 项目主页
   ADEPT 风格 · 北欧极简
   ======================================== */

@import url("https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600&display=swap");

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

:root {
  /* 配色 — 纯白基底 */
  --color-bg: #ffffff;
  --color-card: #fafaf9;
  --color-text: #1a1a1a;
  --color-text-muted: #757575;
  --color-text-light: #aaaaaa;
  --color-border: #e5e5e5;
  --color-border-light: #f0f0f0;
  --color-accent: #999999;
  --color-hover: rgba(0, 0, 0, 0.03);

  /* 字体 */
  --font-sans: "Inter", -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;

  /* 布局 */
  --max-width: 1320px;
  --header-height: 64px;
  --grid-gap: 28px;
  --section-padding: 80px;
  --radius: 4px;
  --transition: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --transition-fast: 0.2s ease;
}

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

body {
  font-family: var(--font-sans);
  font-weight: 400;
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.6;
  padding-top: var(--header-height);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

  /* ── 图片防盗保护 ── */
  user-select: none;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  -webkit-user-drag: none;
  -khtml-user-drag: none;
  -webkit-touch-callout: none;
  pointer-events: auto;
}

/* ── 固定顶部导航 ── */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  background-color: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border-light);
}

.header-inner {
  width: 100%;
  max-width: var(--max-width);
  height: 100%;
  margin: 0 auto;
  padding: 0 clamp(24px, 4vw, 48px);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-family: "Segoe UI Black", "Segoe UI", var(--font-sans);
  font-size: 1.75rem;
  font-weight: 900;
  letter-spacing: 0.02em;
  color: var(--color-text);
}

.logo-wide {
  letter-spacing: 0.1em;
}

.logo-tight {
  letter-spacing: 0em;
}

.logo-sub {
  font-size: 0.875rem;
  font-weight: 400;
  font-family: "Source Han Sans CN", "思源黑体 CN", "Noto Sans SC", var(--font-sans);
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  margin-left: 6px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: clamp(24px, 4vw, 40px);
}

.nav-link {
  position: relative;
  font-size: 0.8125rem;
  font-weight: 400;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  padding: 6px 0;
  transition: color var(--transition-fast);
}

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

.nav-link:hover,
.nav-link.active {
  color: var(--color-text);
}

.nav-link:hover::after,
.nav-link.active::after {
  transform: scaleX(1);
  transform-origin: left;
}

/* ── 项目区域 ── */
.projects-section {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--section-padding) clamp(24px, 4vw, 48px);
}

/* 区域介绍文案 */
.section-intro {
  margin-bottom: 48px;
}

.section-intro p {
  font-size: 0.8125rem;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
}

/* ── 筛选按钮 ── */
.filter-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 48px;
}

.filter-btn {
  display: inline-flex;
  align-items: center;
  padding: 8px 20px;
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 400;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: 2px;
  cursor: pointer;
  transition: color var(--transition-fast),
              background-color var(--transition-fast),
              border-color var(--transition-fast);
  user-select: none;
  -webkit-user-select: none;
}

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

.filter-btn.is-active {
  color: #ffffff;
  background-color: var(--color-text);
  border-color: var(--color-text);
}

/* ── 三列项目网格 ── */
.project-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--grid-gap);
}

/* ── 项目卡片 ── */
.project-card {
  background-color: var(--color-card);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition), opacity 0.3s ease;
}

.project-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.06);
}

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

.card-link {
  display: block;
}

/* 图片区域 */
.card-image {
  position: relative;
  aspect-ratio: 4 / 5;
  overflow: hidden;
}

.card-image-placeholder {
  width: 100%;
  height: 100%;
  background-color: #f0f0f0;
  background-size: cover;
  background-position: center;
  transition: transform var(--transition);

  /* ── 图片防盗保护 ── */
  user-select: none;
  -webkit-user-select: none;
  -webkit-user-drag: none;
  -webkit-touch-callout: none;
}

.project-card:hover .card-image-placeholder {
  transform: scale(1.03);
}

/* 图片悬停叠加 */
.card-image-hover {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.04);
  opacity: 0;
  transition: opacity var(--transition);
  pointer-events: none;
}

.project-card:hover .card-image-hover {
  opacity: 1;
}

/* 卡片信息区域 */
.card-meta {
  padding: 22px 20px 24px;
}

.card-meta h3 {
  font-size: 0.875rem;
  font-weight: 400;
  letter-spacing: 0.02em;
  line-height: 1.4;
  color: var(--color-text);
  margin-bottom: 0;
}

.card-date {
  font-weight: 400;
  color: var(--color-text-light);
  font-size: 0.8125rem;
  margin-left: 2px;
}

.card-subtitle {
  font-size: 0.75rem;
  font-weight: 400;
  letter-spacing: 0.02em;
  color: var(--color-text-light);
  margin-bottom: 0;
}

.card-tag {
  font-size: 0.75rem;
  font-weight: 400;
  letter-spacing: 0.06em;
  color: var(--color-text-light);
  margin-top: 0;
}

/* ── 空状态提示 ── */
.empty-message {
  grid-column: 1 / -1;
  text-align: center;
  padding: 64px 20px;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
}

/* ── 关于页面 ── */
.about-section {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--section-padding) clamp(24px, 4vw, 48px);
  min-height: calc(100vh - var(--header-height) - 100px);
  display: flex;
  align-items: center;
  justify-content: center;
}

.about-content {
  max-width: 640px;
}

.about-content h1 {
  font-size: 1.5rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--color-text);
  margin-bottom: 28px;
}

.about-content p {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  letter-spacing: 0.03em;
  line-height: 1.9;
  margin-bottom: 18px;
}

.about-content p:last-child {
  margin-bottom: 0;
}

/* ── 联系页面 ── */
.contact-section {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--section-padding) clamp(24px, 4vw, 48px);
  min-height: calc(100vh - var(--header-height) - 100px);
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.contact-content h1 {
  font-size: 1.5rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--color-text);
  margin-bottom: 20px;
}

.contact-content p {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
  line-height: 1.8;
}

.contact-email {
  margin-top: 12px;
}

.contact-email a {
  font-size: 1.0625rem;
  font-weight: 500;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 2px;
  transition: border-color var(--transition-fast);
}

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

/* ── 页脚 ── */
.site-footer {
  border-top: 1px solid var(--color-border-light);
  padding: 32px 0;
}

.footer-inner {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 clamp(24px, 4vw, 48px);
}

.footer-inner p {
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: var(--color-text-light);
}

.footer-inner a {
  color: var(--color-text-muted);
  border-bottom: 1px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.footer-inner a:hover {
  color: var(--color-text);
  border-bottom-color: var(--color-text-muted);
}

/* ── 响应式 ── */

/* 平板：两列 */
@media (max-width: 1024px) {
  .project-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  :root {
    --section-padding: 60px;
  }
}

/* 手机：单列 */
@media (max-width: 640px) {
  :root {
    --header-height: 56px;
    --section-padding: 48px;
  }

  .logo {
    font-size: 1.375rem;
  }

  .logo-sub {
    font-size: 0.8125rem;
  }

  .main-nav {
    gap: 16px;
  }

  .nav-link {
    font-size: 0.75rem;
  }

  .project-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .filter-bar {
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 32px;
  }

  .filter-btn {
    padding: 6px 16px;
    font-size: 0.75rem;
  }

  .card-meta {
    padding: 16px 14px 18px;
  }

  .card-meta h3 {
    font-size: 0.8125rem;
  }

  .card-image {
    aspect-ratio: 3 / 4;
  }

  /* 触摸设备 hover 降级 */
  .project-card:active {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.05);
  }

  .project-card:active .card-image-placeholder {
    transform: scale(1.02);
  }

  .project-card:active .card-image-hover {
    opacity: 1;
  }
}

/* 大屏：增加间距 */
@media (min-width: 1600px) {
  :root {
    --grid-gap: 36px;
    --section-padding: 100px;
    --max-width: 1440px;
  }

  .card-meta h3 {
    font-size: 0.9375rem;
  }

  .card-image {
    aspect-ratio: 3 / 4;
  }
}

/* 减少动画偏好 */
@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;
  }

  .project-card:hover {
    transform: none;
  }

  .project-card:hover .card-image-placeholder {
    transform: none;
  }
}

/* ========================================
   项目详情页 — 左右滚轮画廊
   ======================================== */

.project-detail-page {}

/* ── 项目信息栏 ── */
.project-info-bar {
  border-top: 1px solid var(--color-border-light);
  background-color: var(--color-bg);
}

.project-info-inner {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 20px clamp(24px, 4vw, 48px) 18px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
}

.back-link {
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  white-space: nowrap;
  padding-top: 4px;
  transition: color var(--transition-fast);
}

.back-link:hover {
  color: var(--color-text);
}

.project-info-text {
  flex: 1;
  min-width: 0;
}

.project-info-text h1 {
  font-size: 1.125rem;
  font-weight: 400;
  letter-spacing: 0.02em;
  line-height: 1.4;
  color: var(--color-text);
  margin-bottom: 4px;
}

.project-info-meta {
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--color-text-light);
  display: flex;
  align-items: center;
  gap: 8px;
}

.meta-sep {
  color: var(--color-border);
}

.project-unit {
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  margin-top: 6px;
}

.project-counter {
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--color-text-light);
  white-space: nowrap;
  padding-top: 4px;
  font-variant-numeric: tabular-nums;
}

/* ── 左右滚动画廊 ── */
.gallery-wrapper {
  position: relative;
  height: calc(100vh - var(--header-height));
  min-height: 400px;
  overflow: hidden;
}

.gallery-track {
  height: 100%;
  display: flex;
  align-items: center;
  gap: 0;
  overflow-x: auto;
  overflow-y: hidden;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.gallery-track::-webkit-scrollbar {
  display: none;
}

.gallery-item {
  flex: 0 0 100%;
  height: 100%;
  scroll-snap-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px clamp(24px, 4vw, 48px);
}

.gallery-item img {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
  user-select: none;
  -webkit-user-drag: none;
  -webkit-touch-callout: none;
  pointer-events: none;
}

/* ── 箭头按钮 ── */
.gallery-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--color-border);
  border-radius: 2px;
  color: var(--color-text);
  cursor: pointer;
  transition: opacity var(--transition-fast), background-color var(--transition-fast);
  user-select: none;
}

.gallery-arrow:hover {
  background-color: rgba(255, 255, 255, 1);
}

.gallery-arrow-left {
  left: 16px;
}

.gallery-arrow-right {
  right: 16px;
}

/* ── 响应式：项目详情页 ── */
@media (max-width: 768px) {
  .project-info-inner {
    flex-wrap: wrap;
    padding: 16px 20px 14px;
  }

  .project-info-text {
    order: 2;
    flex: 1 1 100%;
  }

  .project-counter {
    order: 3;
  }

  .gallery-wrapper {
    height: calc(100vh - var(--header-height));
  }

  .gallery-arrow {
    width: 36px;
    height: 36px;
  }

  .gallery-arrow-left {
    left: 8px;
  }

  .gallery-arrow-right {
    right: 8px;
  }
}