/* 银堂 · 宣纸底 + 墨色 + 朱砂一点；直角为主，圆只给月洞门 */

@font-face { font-family: "Cormorant"; src: url("fonts/cormorant-400.woff2") format("woff2"); font-weight: 400; font-display: swap; }
@font-face { font-family: "Cormorant"; src: url("fonts/cormorant-400i.woff2") format("woff2"); font-weight: 400; font-style: italic; font-display: swap; }
@font-face { font-family: "Cormorant"; src: url("fonts/cormorant-500.woff2") format("woff2"); font-weight: 500; font-display: swap; }
@font-face { font-family: "Cormorant"; src: url("fonts/cormorant-600.woff2") format("woff2"); font-weight: 600; font-display: swap; }
@font-face { font-family: "Inter"; src: url("fonts/inter-400.woff2") format("woff2"); font-weight: 400; font-display: swap; }
@font-face { font-family: "Inter"; src: url("fonts/inter-500.woff2") format("woff2"); font-weight: 500; font-display: swap; }
/* 只含页面用到的汉字，改了中文要重跑 tools/subset-zh.sh */
@font-face { font-family: "Song"; src: url("fonts/noto-serif-sc-subset.woff2") format("woff2"); font-weight: 600; font-display: block; }

:root {
  --paper: #F3EEE3;
  --paper-2: #EAE3D4;
  --ink: #1E1B17;
  --ink-2: #48423A;
  --ink-3: #6E675B;
  --line: #D3C9B6;
  --cinnabar: #A3312A;
  --cinnabar-2: #8A2721;
  --on-ink: #EFE9DC;
  --on-ink-2: #B4AC9C;

  --serif: "Cormorant", "Iowan Old Style", "Palatino Linotype", Georgia, serif;
  --sans: "Inter", -apple-system, "Segoe UI", Roboto, sans-serif;
  --zh: "Song", "Songti SC", "STSong", "Noto Serif SC", serif;

  --wrap: 1200px;
  --gutter: 16px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 16px/1.7 var(--sans);
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; }
[lang="zh"] { font-family: var(--zh); font-weight: 600; }
h1, h2, h3 { font-family: var(--serif); font-weight: 500; margin: 0; letter-spacing: -0.005em; }
p { margin: 0; }
:focus-visible { outline: 2px solid var(--cinnabar); outline-offset: 2px; }

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 var(--gutter); }

/* 按钮与链接 */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  height: 48px; padding: 0 24px;
  font: 500 13px/1 var(--sans); letter-spacing: .12em; text-transform: uppercase; text-decoration: none;
  border: 1px solid var(--ink); color: var(--ink); background: transparent;
  transition: background-color .2s ease-out, color .2s ease-out, border-color .2s ease-out;
}
.btn:hover { background: var(--ink); color: var(--paper); }
.btn-solid { background: var(--cinnabar); border-color: var(--cinnabar); color: #F7F1E6; }
.btn-solid:hover { background: var(--cinnabar-2); border-color: var(--cinnabar-2); color: #F7F1E6; }
.btn-sm { height: 40px; padding: 0 16px; }
.link {
  font: 500 13px/1 var(--sans); letter-spacing: .12em; text-transform: uppercase;
  text-decoration: none; padding-bottom: 4px; border-bottom: 1px solid currentColor;
  transition: color .2s ease-out;
}
.link:hover { color: var(--cinnabar); }

.eyebrow {
  display: flex; align-items: center; gap: 12px;
  font: 500 13px/1.4 var(--sans); letter-spacing: .14em; text-transform: uppercase; color: var(--ink-3);
}
.eyebrow [lang="zh"] {
  font-size: 16px; letter-spacing: .2em; color: var(--cinnabar); text-transform: none;
  padding-right: 12px; border-right: 1px solid var(--line);
}

/* 印章 */
.seal {
  display: inline-grid; place-items: center; flex: none;
  background: var(--cinnabar); color: #F7EEE2; border-radius: 2px;
  box-shadow: inset 0 0 0 2px var(--cinnabar), inset 0 0 0 3px rgba(247,238,226,.55);
}
.seal span { font-family: var(--zh); font-weight: 600; writing-mode: vertical-rl; letter-spacing: .04em; line-height: 1; }
.seal-sm { width: 40px; height: 40px; }
.seal-sm span { font-size: 16px; }
.seal-lg { width: 64px; height: 64px; }
.seal-lg span { font-size: 25px; }

/* 顶栏 */
.top { position: sticky; top: 0; z-index: 10; background: rgba(243,238,227,.94); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.top-in { display: flex; align-items: center; justify-content: space-between; gap: 24px; height: 72px; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.brand-txt { display: flex; flex-direction: column; }
.brand-name { font: 600 25px/1 var(--serif); letter-spacing: .02em; }
.brand-sub { font: 500 11px/1.6 var(--sans); letter-spacing: .16em; text-transform: uppercase; color: var(--ink-3); white-space: nowrap; }
@media (max-width: 419px) { .top .brand-sub { display: none; } }
.nav { display: none; gap: 32px; }
.nav a { font: 500 13px/1 var(--sans); letter-spacing: .12em; text-transform: uppercase; text-decoration: none; color: var(--ink-2); padding: 8px 0; transition: color .2s ease-out; }
.nav a:hover { color: var(--cinnabar); }

/* 首屏 */
.hero { display: grid; gap: 48px; padding-top: 48px; padding-bottom: 64px; align-items: center; }
.hero h1 { font-size: 39px; line-height: 1.12; margin: 24px 0 24px; max-width: 11em; text-wrap: balance; }
.lead { font: 400 20px/1.6 var(--serif); color: var(--ink-2); max-width: 34em; }
.hero-cta { display: flex; flex-wrap: wrap; align-items: center; gap: 24px 32px; margin-top: 32px; }

.moon { position: relative; margin: 0 auto; width: min(100%, 340px); padding: 0 8px; }
.moon-ring { border-radius: 50%; padding: 12px; border: 1px solid var(--line); }
.moon-ring img { border-radius: 50%; aspect-ratio: 1; object-fit: cover; width: 100%; background: var(--paper-2); }
.moon-verse {
  position: absolute; top: 8%; left: -12px; writing-mode: vertical-rl;
  font-size: 16px; letter-spacing: .35em; color: var(--ink-2);
}
.moon .seal-lg { position: absolute; right: 4px; bottom: 6%; transform: rotate(-4deg); width: 52px; height: 52px; }
.moon .seal-lg span { font-size: 20px; }
@media (prefers-reduced-motion: no-preference) {
  .moon-ring img { animation: rise .25s ease-out both; }
  @keyframes rise { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
}

/* 回纹 */
.fret {
  height: 24px; opacity: .7;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24'%3E%3Cpath d='M0 22.5H24M22 22.5V1.5H4V18H18V6H8.5V13.5H13.5V10' fill='none' stroke='%23A3312A' stroke-width='1.5'/%3E%3C/svg%3E") repeat-x left center;
}

/* 区块 */
.sec { padding: 64px 0; }
.sec-alt { background: var(--paper-2); }
.sec-head { max-width: 640px; margin-bottom: 48px; }
.sec-head h2, .contact h2 { font-size: 31px; line-height: 1.15; margin-top: 16px; }
.sec-lead { font: 400 20px/1.6 var(--serif); color: var(--ink-2); margin-top: 16px; }

/* 藏品 */
.piece { display: grid; gap: 32px; }
.piece-main { margin: 0; background: var(--paper-2); }
.piece-main img { width: 100%; aspect-ratio: 960 / 1040; object-fit: cover; }
.piece-thumbs { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 12px; }
.piece-thumbs figure { margin: 0; }
.piece-thumbs img { width: 100%; aspect-ratio: 3 / 4; object-fit: cover; background: var(--paper-2); }
.piece-thumbs figcaption { font: 400 13px/1.5 var(--sans); color: var(--ink-3); margin-top: 8px; }

.piece-body { min-width: 0; }
.piece-no { font: 500 13px/1 var(--sans); letter-spacing: .16em; text-transform: uppercase; color: var(--cinnabar); }
.piece-body h3 { font-size: 39px; line-height: 1.1; margin: 16px 0 8px; }
.piece-zh { font-size: 20px; letter-spacing: .3em; color: var(--ink-2); margin-bottom: 24px; }
.piece-desc { font: 400 20px/1.6 var(--serif); color: var(--ink-2); max-width: 34em; }

.wishes { list-style: none; padding: 0; margin: 24px 0 32px; display: grid; gap: 16px; }
.wishes li { display: grid; grid-template-columns: auto 1fr; gap: 16px; align-items: baseline; padding-left: 16px; border-left: 2px solid var(--cinnabar); }
.wishes b { font-size: 16px; letter-spacing: .12em; white-space: nowrap; }
.wishes span { color: var(--ink-2); }

.specs { margin: 0 0 32px; border-top: 1px solid var(--line); }
.specs div { display: grid; grid-template-columns: 128px 1fr; gap: 16px; padding: 12px 0; border-bottom: 1px solid var(--line); }
.specs dt { font: 500 13px/1.7 var(--sans); letter-spacing: .1em; text-transform: uppercase; color: var(--ink-3); }
.specs dd { margin: 0; }

.piece-cta { display: flex; flex-wrap: wrap; align-items: center; gap: 16px 24px; }
.price { font: 500 25px/1 var(--serif); }

.more { display: flex; align-items: center; gap: 24px; margin-top: 64px; padding: 32px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.more-zh { writing-mode: vertical-rl; font-size: 20px; letter-spacing: .3em; color: var(--cinnabar); }
.more p { font: 400 20px/1.6 var(--serif); color: var(--ink-2); }
.more .link { font-size: 13px; color: var(--ink); }

/* 纹样 */
.glyphs { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.glyphs li { padding: 24px 16px 32px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); min-width: 0; }
.glyph { display: block; font-size: 49px; line-height: 1; color: var(--ink); margin-bottom: 16px; }
.glyphs h3 { font-size: 25px; line-height: 1.2; }
.glyphs h3 i { font-size: 20px; color: var(--ink-3); }
.glyphs p { font-size: 15px; color: var(--ink-2); margin-top: 8px; }

/* 工艺 */
.crafts { list-style: none; padding: 0; margin: 0; display: grid; gap: 48px; }
.crafts li { display: grid; grid-template-columns: 56px 1fr; column-gap: 16px; }
.crafts .num { grid-row: span 2; font-size: 39px; line-height: 1; color: var(--cinnabar); }
.crafts h3 { font-size: 25px; line-height: 1.2; }
.crafts h3 [lang="zh"] { font-size: 16px; letter-spacing: .2em; color: var(--ink-3); margin-left: 8px; }
.crafts p { color: var(--ink-2); margin-top: 8px; max-width: 34em; }

/* 购买流程（墨底） */
.sec-ink { background: var(--ink); color: var(--on-ink); }
.sec-ink .eyebrow { color: var(--on-ink-2); }
.sec-ink .eyebrow [lang="zh"] { color: #D9655B; border-color: rgba(239,233,220,.2); }
.steps { list-style: none; padding: 0; margin: 0; display: grid; gap: 32px; }
.steps li { border-top: 1px solid rgba(239,233,220,.2); padding-top: 16px; }
.step-no { font: 500 13px/1 var(--sans); letter-spacing: .16em; color: #D9655B; }
.steps h3 { font-size: 25px; line-height: 1.2; margin: 12px 0 8px; }
.steps p { color: var(--on-ink-2); }

/* 联系 */
.contact-in { display: flex; gap: 32px; align-items: flex-start; }
.contact-zh { writing-mode: vertical-rl; font-size: 39px; letter-spacing: .2em; color: var(--cinnabar); line-height: 1; padding-top: 4px; }
.contact .sec-lead { max-width: 30em; margin-bottom: 32px; }
.mail-addr { font-size: 15px; color: var(--ink-3); margin-top: 16px; }

/* 页脚 */
.foot { padding-bottom: 32px; }
.foot-in { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 16px; padding-top: 32px; }
.foot-note { font-size: 13px; color: var(--ink-3); }

/* ≥ 768 */
@media (min-width: 768px) {
  :root { --gutter: 32px; }
  .hero h1 { font-size: 49px; }
  .moon { width: min(100%, 420px); }
  .sec { padding: 96px 0; }
  .sec-head h2, .contact h2 { font-size: 39px; }
  .glyphs { grid-template-columns: repeat(3, 1fr); }
  .glyphs li { padding: 32px 24px 40px; }
  .crafts { grid-template-columns: repeat(3, 1fr); gap: 32px; }
  .steps { grid-template-columns: repeat(4, 1fr); gap: 24px; }
}

/* ≥ 1024 */
@media (min-width: 1024px) {
  :root { --gutter: 48px; }
  .nav { display: flex; }
  .hero { grid-template-columns: 1.1fr 1fr; gap: 64px; padding-top: 80px; padding-bottom: 96px; min-height: calc(100vh - 96px); max-height: 900px; }
  .hero h1 { font-size: 61px; }
  .moon { width: min(100%, 500px); }
  .moon-verse { left: -32px; font-size: 20px; }
  .moon .seal-lg { width: 64px; height: 64px; right: 0; }
  .moon .seal-lg span { font-size: 25px; }
  .sec { padding: 128px 0; }
  .piece { grid-template-columns: 1fr 1fr; gap: 64px; align-items: start; }
  .piece-body { position: sticky; top: 104px; }
  .contact-zh { font-size: 61px; }
}