/* ============================================================
   指尖温度 · Warmth by Hand — 手工作品展示网站
   Design tokens 基于 Museum Editorial 风格参考
   ============================================================ */
:root {
  /* 原始色板 */
  --c-bg: #F7F3EA;
  --c-surface: #FFFFFF;
  --c-fg: #1E1C18;
  --c-muted: #7A7166;
  --c-accent: #8E2F2F;
  --c-accent-hover: #742424;
  --c-patina: #4E7464;
  --c-gold: #B28A3E;
  --c-border: #D7CFC1;
  --c-bg-muted: #EFE9DC;

  /* 语义 token */
  --color-bg-page: var(--c-bg);
  --color-bg-surface: var(--c-surface);
  --color-bg-muted: var(--c-bg-muted);
  --color-text-primary: var(--c-fg);
  --color-text-secondary: var(--c-muted);
  --color-action-primary: var(--c-accent);
  --color-action-primary-hover: var(--c-accent-hover);
  --color-focus-ring: var(--c-gold);

  /* 字体 */
  --font-display: Georgia, "Palatino Linotype", "Songti SC", "SimSun", serif;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  /* 间距（8px 基线） */
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-5: 48px;
  --space-section: 96px;

  /* 圆角 / 阴影 */
  --radius-control: 2px;
  --radius-card: 4px;
  --shadow-raised: 0 2px 12px rgba(30, 28, 24, 0.08);
  --shadow-hover: 0 8px 24px rgba(30, 28, 24, 0.12);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text-primary);
  background: var(--color-bg-page);
  -webkit-font-smoothing: antialiased;
}

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

a { color: inherit; text-decoration: none; }
a:hover { color: var(--color-action-primary); }

button { font-family: inherit; cursor: pointer; }

:focus-visible {
  outline: 2px solid var(--color-focus-ring);
  outline-offset: 2px;
}

.container { max-width: 1200px; margin: 0 auto; padding: 0 var(--space-3); }

/* ---------- 排版 ---------- */
h1, h2, h3, .display {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -0.015em;
}
h1 { font-size: clamp(36px, 5vw, 56px); letter-spacing: -0.02em; }
h2 { font-size: clamp(28px, 3.5vw, 40px); letter-spacing: -0.015em; }
h3 { font-size: 20px; line-height: 1.3; }

.eyebrow {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
}
.eyebrow::before {
  content: "";
  display: inline-block;
  width: 24px; height: 1px;
  background: var(--c-gold);
  vertical-align: middle;
  margin-right: 10px;
}

.section { padding: var(--space-section) 0; }
.section-head { display: flex; justify-content: space-between; align-items: flex-end; margin-bottom: var(--space-5); gap: var(--space-3); flex-wrap: wrap; }
.section-head p { color: var(--color-text-secondary); max-width: 48ch; }

.mono { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.05em; color: var(--color-text-secondary); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-block;
  padding: 12px 28px;
  font-size: 14px;
  letter-spacing: 0.02em;
  border-radius: var(--radius-control);
  border: 1px solid transparent;
  transition: all 0.2s ease;
  background: none;
}
.btn-primary { background: var(--color-action-primary); color: #F7F3EA; }
.btn-primary:hover { background: var(--color-action-primary-hover); color: #F7F3EA; }
.btn-outline { border-color: var(--c-border); color: var(--color-text-primary); }
.btn-outline:hover { border-color: var(--color-text-primary); }
.btn:active { transform: translateY(1px); }

/* ---------- 导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: color-mix(in srgb, var(--color-bg-page) 92%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--c-border);
}
.nav {
  display: flex; align-items: center; gap: var(--space-3);
  height: 72px;
}
.brand { display: flex; align-items: center; gap: 10px; margin-right: var(--space-2); }
.brand svg { width: 30px; height: 30px; }
.brand-name { font-family: var(--font-display); font-size: 19px; letter-spacing: 0.02em; white-space: nowrap; }
.brand-name small { display: block; font-size: 10px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--color-text-secondary); }

.nav-search {
  flex: 0 1 220px;
  display: flex; align-items: center; gap: 8px;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-control);
  padding: 7px 12px;
  background: var(--color-bg-surface);
}
.nav-search input { border: none; background: none; outline: none; font-size: 13px; width: 100%; color: var(--color-text-primary); font-family: inherit; }
.nav-search svg { width: 14px; height: 14px; color: var(--color-text-secondary); flex: none; }

.nav-menu { display: flex; gap: var(--space-3); margin-left: auto; list-style: none; }
.nav-menu a {
  font-size: 14px; letter-spacing: 0.02em; padding: 6px 2px;
  border-bottom: 1px solid transparent; transition: border-color 0.2s;
}
.nav-menu a:hover, .nav-menu a.active { border-bottom-color: var(--color-action-primary); color: var(--color-text-primary); }

.lang-toggle {
  border: 1px solid var(--c-border); border-radius: var(--radius-control);
  background: var(--color-bg-surface); padding: 7px 14px;
  font-size: 12px; letter-spacing: 0.06em; text-transform: uppercase;
}
.lang-toggle:hover { border-color: var(--color-text-primary); }

.nav-toggle { display: none; border: 1px solid var(--c-border); background: none; border-radius: var(--radius-control); padding: 8px 10px; }
.nav-toggle svg { width: 18px; height: 18px; display: block; }

/* ---------- 轮播 ---------- */
.carousel { position: relative; overflow: hidden; border-bottom: 1px solid var(--c-border); }
.carousel-track { display: flex; transition: transform 0.7s cubic-bezier(0.4, 0, 0.2, 1); }
.carousel-slide {
  flex: 0 0 100%;
  min-height: min(78vh, 680px);
  display: flex; align-items: center;
  padding: var(--space-5) 0;
}
.slide-art { flex: 1; min-width: 0; display: flex; align-items: center; justify-content: center; }
.slide-art svg, .slide-art img { width: 100%; height: auto; max-height: 620px; display: block; margin: 0 auto; object-fit: contain; }
.slide-copy { flex: 0 0 380px; padding-left: var(--space-5); }
.slide-copy h1 { margin-bottom: var(--space-2); }
.slide-copy p { color: var(--color-text-secondary); margin-bottom: var(--space-3); max-width: 40ch; }
.carousel-dots { display: flex; gap: 10px; margin-top: var(--space-4); }
.carousel-dots button {
  width: 28px; height: 2px; border: none; padding: 0;
  background: var(--c-border); transition: background 0.3s;
}
.carousel-dots button[aria-current="true"] { background: var(--color-action-primary); }
.carousel-arrow {
  position: absolute; top: 50%; transform: translateY(-50%);
  width: 44px; height: 44px; border-radius: 50%;
  border: 1px solid var(--c-border); background: var(--color-bg-surface);
  display: flex; align-items: center; justify-content: center;
}
.carousel-arrow:hover { border-color: var(--color-text-primary); }
.carousel-arrow svg { width: 16px; height: 16px; }
.carousel-arrow.prev { left: var(--space-2); }
.carousel-arrow.next { right: var(--space-2); }

/* ---------- 作品卡片 ---------- */
.works-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}
.work-card { border: none; background: none; text-align: left; padding: 0; display: block; width: 100%; }
.work-card .ph {
  aspect-ratio: 4 / 5;
  border-radius: var(--radius-card);
  overflow: hidden;
  margin-bottom: var(--space-2);
  position: relative;
  display: block;
  width: 100%;
}
.work-card .ph img, .work-card .ph svg { width: 100%; height: 100%; display: block; transition: transform 0.5s ease; object-fit: cover; }
.work-card:hover .ph img, .work-card:hover .ph svg { transform: scale(1.03); }
.work-card:hover { box-shadow: none; }
.work-meta { display: flex; justify-content: space-between; align-items: baseline; gap: 8px; min-height: 24px; }
.work-title { font-family: var(--font-display); font-size: 17px; line-height: 1.35; }
.work-code { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.05em; color: var(--color-text-secondary); white-space: nowrap; }
.work-desc { display: block; font-size: 13px; color: var(--color-text-secondary); margin-top: 4px; line-height: 1.5; }
.work-tag {
  position: absolute; top: 12px; left: 12px;
  font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase;
  padding: 4px 10px; border-radius: var(--radius-control);
  background: color-mix(in srgb, var(--color-bg-surface) 88%, transparent);
  color: var(--color-text-primary);
}
.work-tag.limited { background: var(--c-accent); color: #F7F3EA; }
.work-tag.new { background: var(--c-patina); color: #F7F3EA; }

/* ---------- 手作制作过程 ---------- */
.process-section {
  padding-top: 0;
}
.process-section > .container {
  border-top: 1px solid var(--c-border);
  padding-top: var(--space-section);
}
.process-heading {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}
.process-heading > p {
  max-width: 38ch;
  color: var(--color-text-secondary);
}
.process-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.72fr) minmax(260px, 1fr);
  grid-template-rows: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
}
.process-card {
  position: relative;
  min-width: 0;
  overflow: hidden;
  border: 0;
  border-radius: var(--radius-card);
  padding: 0;
  background: var(--c-bg-muted);
  color: #fff;
  text-align: left;
  aspect-ratio: 16 / 9;
  box-shadow: none;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.process-card-main {
  grid-row: 1 / 3;
  aspect-ratio: auto;
  min-height: 500px;
}
.process-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}
.process-card-poster {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}
.process-card-poster {
  object-fit: cover;
  transition: transform 0.45s ease;
}
.process-card:hover .process-card-poster { transform: scale(1.025); }
.process-play {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: grid;
  place-items: center;
  width: 58px;
  height: 58px;
  border-radius: 50%;
  background: rgba(247, 243, 234, 0.92);
  color: var(--c-accent);
  font-size: 17px;
  padding-left: 3px;
  box-shadow: 0 4px 18px rgba(30, 28, 24, 0.18);
  transition: transform 0.2s ease, background 0.2s ease;
}
.process-card:hover .process-play { transform: translate(-50%, -50%) scale(1.07); background: #fff; }
.process-modal { padding: var(--space-3); }
.process-modal-dialog {
  position: relative;
  width: min(960px, 100%);
  max-height: calc(100vh - 48px);
  overflow: auto;
  border-radius: var(--radius-card);
  background: var(--color-bg-surface);
  box-shadow: var(--shadow-hover);
}
.process-modal-close {
  position: absolute;
  z-index: 2;
  top: 10px;
  right: 10px;
  width: 38px;
  height: 38px;
  border: 1px solid rgba(255,255,255,.45);
  border-radius: 50%;
  background: rgba(30, 28, 24, 0.65);
  color: #fff;
  font-size: 26px;
  line-height: 1;
}
.process-video-frame {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 360px;
  background: #171512;
}
.process-video-frame video {
  display: block;
  width: 100%;
  max-height: 68vh;
  object-fit: contain;
}
.process-video-frame video[hidden] { display: none; }
.process-video-message {
  padding: var(--space-5) var(--space-3);
  color: rgba(255,255,255,.82);
  text-align: center;
}

/* ---------- 分类卡 ---------- */
.cat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-4); }
.cat-card {
  border: 1px solid var(--c-border); border-radius: var(--radius-card);
  background: var(--color-bg-surface); overflow: hidden;
  transition: box-shadow 0.25s ease, transform 0.25s ease;
  display: block;
}
.cat-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-3px); }
.cat-card .ph { aspect-ratio: 16 / 10; border-bottom: 1px solid var(--c-border); }
.cat-card .ph img, .cat-card .ph svg { width: 100%; height: 100%; display: block; object-fit: cover; }
.cat-card-body { padding: var(--space-3); }
.cat-card-body h3 { margin-bottom: 6px; }
.cat-card-body p { font-size: 13px; color: var(--color-text-secondary); }
.cat-card-body .mono { display: block; margin-top: 10px; }

/* ---------- 作品集页 ---------- */
.cat-tabs { display: flex; gap: var(--space-1); border-bottom: 1px solid var(--c-border); margin-bottom: var(--space-3); flex-wrap: wrap; }
.cat-tab {
  border: none; background: none; padding: 12px 18px;
  font-size: 15px; font-family: var(--font-display);
  border-bottom: 2px solid transparent; margin-bottom: -1px;
  color: var(--color-text-secondary);
}
.cat-tab[aria-selected="true"] { color: var(--color-text-primary); border-bottom-color: var(--color-action-primary); }
.sub-chips { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: var(--space-4); }
.sub-chip {
  border: 1px solid var(--c-border); border-radius: 999px;
  background: var(--color-bg-surface); padding: 7px 16px;
  font-size: 13px; transition: all 0.2s;
}
.sub-chip:hover { border-color: var(--color-text-primary); }
.sub-chip[aria-pressed="true"] { background: var(--color-text-primary); color: var(--color-bg-page); border-color: var(--color-text-primary); }

.empty-state {
  border: 1px dashed var(--c-border); border-radius: var(--radius-card);
  padding: var(--space-5); text-align: center; color: var(--color-text-secondary);
}

/* ---------- 关于我 ---------- */
.about-grid { display: grid; grid-template-columns: 340px 1fr; gap: var(--space-5); align-items: start; }
.about-photo .ph { aspect-ratio: 3 / 4; border-radius: var(--radius-card); overflow: hidden; }
.about-photo .ph svg { width: 100%; height: 100%; }
.about-copy p { margin-bottom: var(--space-3); max-width: 62ch; }
.about-copy p:last-child { margin-bottom: 0; }
.value-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-3); margin-top: var(--space-4); }
.value-item { border-top: 1px solid var(--c-border); padding-top: var(--space-2); }
.value-item h3 { font-size: 16px; margin-bottom: 6px; }
.value-item p { font-size: 13px; color: var(--color-text-secondary); line-height: 1.55; }

/* ---------- 联系表单 ---------- */
.contact-grid { max-width: 640px; }
.contact-grid form { width: 100%; }
.form-field { margin-bottom: var(--space-3); }
.form-field label { display: block; font-size: 13px; letter-spacing: 0.02em; margin-bottom: 6px; }
.form-field input, .form-field select, .form-field textarea {
  width: 100%; padding: 12px 14px;
  border: 1px solid var(--c-border); border-radius: var(--radius-control);
  background: var(--color-bg-surface); font-size: 15px; font-family: inherit;
  color: var(--color-text-primary);
  transition: border-color 0.2s;
}
.form-field input:focus, .form-field select:focus, .form-field textarea:focus {
  outline: none; border-color: var(--color-text-primary);
}
.form-field textarea { min-height: 130px; resize: vertical; }
.field-error { font-size: 12px; color: var(--c-accent); margin-top: 4px; display: none; }
.form-field.invalid input, .form-field.invalid select, .form-field.invalid textarea { border-color: var(--c-accent); }
.form-field.invalid .field-error { display: block; }

/* ---------- 弹窗 ---------- */
.modal-overlay {
  position: fixed; inset: 0; z-index: 300;
  background: rgba(30, 28, 24, 0.5);
  display: flex; align-items: center; justify-content: center;
  padding: var(--space-3);
  opacity: 0; pointer-events: none; transition: opacity 0.25s;
}
.modal-overlay.open { opacity: 1; pointer-events: auto; }
.modal {
  background: var(--color-bg-surface); border-radius: var(--radius-card);
  max-width: 460px; width: 100%; padding: var(--space-4);
  text-align: center; box-shadow: var(--shadow-hover);
}
.modal .icon { width: 44px; height: 44px; margin: 0 auto var(--space-2); color: var(--c-patina); }
.modal h3 { margin-bottom: 8px; }
.modal p { color: var(--color-text-secondary); font-size: 14px; margin-bottom: var(--space-3); }

/* 灯箱 */
.lightbox .modal { max-width: 720px; padding: var(--space-3); text-align: left; }
.lightbox .lb-art { border-radius: var(--radius-card); overflow: hidden; margin-bottom: var(--space-2); cursor: zoom-in; text-align: center; background: var(--color-bg-muted); }
.lightbox .lb-art svg { width: 100%; height: auto; max-height: 60vh; display: block; transition: transform 0.3s ease; }
.lightbox .lb-art img { max-width: 100%; max-height: 60vh; width: auto; height: auto; display: inline-block; vertical-align: middle; transition: transform 0.3s ease; object-fit: contain; }
.lightbox .lb-art[data-zoom]:hover svg { will-change: transform; }
.lightbox .modal p { margin-bottom: var(--space-2); }

/* ---------- 页脚 ---------- */
.site-footer { border-top: 1px solid var(--c-border); padding: var(--space-5) 0 var(--space-4); margin-top: var(--space-section); background: var(--color-bg-muted); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: var(--space-4); margin-bottom: var(--space-4); }
.footer-grid h3 { font-size: 13px; text-transform: uppercase; letter-spacing: 0.08em; font-family: var(--font-body); color: var(--color-text-secondary); margin-bottom: var(--space-2); }
.footer-grid ul { list-style: none; }
.footer-grid li { margin-bottom: 8px; font-size: 14px; }
.footer-grid a:hover { color: var(--color-action-primary); }
.footer-bottom { border-top: 1px solid var(--c-border); padding-top: var(--space-3); display: flex; justify-content: space-between; gap: var(--space-2); flex-wrap: wrap; }

/* ---------- 页面切换 ---------- */
.page { display: none; }
.page.active { display: block; animation: fadein 0.35s ease; }
@keyframes fadein { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .works-grid { grid-template-columns: repeat(2, 1fr); }
  .cat-grid { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; }
  .about-photo .ph { max-width: 380px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 880px) {
  .nav-toggle { display: block; margin-left: auto; }
  .nav-search, .nav-menu, .lang-toggle { display: none; }
  .site-header.open .nav-menu {
    display: flex; flex-direction: column;
    position: absolute; top: 72px; left: 0; right: 0;
    background: var(--color-bg-page); border-bottom: 1px solid var(--c-border);
    padding: var(--space-2) var(--space-3) var(--space-3); gap: var(--space-2);
  }
  .site-header.open .lang-toggle { display: block; margin-top: var(--space-1); }
  .site-header.open .nav-search { display: flex; margin-top: var(--space-2); flex: 1 1 auto; }
  .nav-menu a { display: block; padding: 10px 0; font-size: 16px; }
  .slide-copy { flex: 0 0 100%; padding-left: 0; }
  .carousel-slide { flex-direction: column; min-height: 0; gap: var(--space-3); }
  .slide-art svg, .slide-art img { max-height: 420px; }
  .value-list { grid-template-columns: 1fr; }
  .process-grid { grid-template-columns: minmax(0, 1.45fr) minmax(220px, 1fr); gap: var(--space-2); }
  .process-card-main { min-height: 420px; }
}
@media (max-width: 640px) {
  :root { --space-section: 56px; }
  .works-grid { grid-template-columns: repeat(2, 1fr); gap: var(--space-2); }
  .work-title { font-size: 15px; }
  .work-desc { font-size: 12px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
  .footer-grid { grid-template-columns: 1fr; }
  .brand-name small { display: none; }
  .carousel-arrow { display: none; }
  .process-heading { display: block; margin-bottom: var(--space-4); }
  .process-heading > p { margin-top: var(--space-2); }
  .process-grid { display: flex; flex-direction: column; gap: var(--space-2); }
  .process-card,
  .process-card-main { width: 100%; min-height: 0; aspect-ratio: 16 / 10; }
  .process-play { width: 50px; height: 50px; }
  .process-video-frame { min-height: 220px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
  html { scroll-behavior: auto; }
}