/* 了卜 LIAOBU — 器物内页样式
   品牌色板 · 2026-09-10 定稿，与 replica.css 保持一致：
   宣纸米 #FCFAF5 / 素米 #F6F1E6 / 深米 #EEE7D8 / 细线 #E5DDCC
   墨 #1A1A1A / 次墨 #4C4740 / 淡墨 #8B8478 / 点缀金 #C9A876 / 禅绿 #6B8068 */

:root {
  --bg: #FCFAF5;
  --paper: #F6F1E6;
  --paper-2: #EEE7D8;
  --ink: #1a1a1a;
  --ink-2: #4C4740;
  --text-soft: #8B8478;
  --gray: #b0b0b0;
  --line: #E5DDCC;
  --gold: #c9a876;
  --green: #6b8068;
  --serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", -apple-system, sans-serif;
  --nav-h: 76px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: var(--nav-h); }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 2;
  letter-spacing: 0.06em;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

.wrap { width: 100%; max-width: 1160px; margin: 0 auto; padding: 0 40px; }
.wrap-narrow { max-width: 860px; }

/* ---------- 导航 ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  height: var(--nav-h);
  background: rgba(252, 250, 245, 0.88);
  backdrop-filter: saturate(140%) blur(12px);
  border-bottom: 1px solid var(--line);
  transition: border-color .4s;
}
.nav-inner {
  height: 100%;
  display: flex; align-items: center; justify-content: space-between;
}
.nav-logo { display: flex; align-items: center; gap: 12px; }
.nav-logo img { height: 40px; width: auto; }
.nav-logo .brand-word {
  font-family: var(--serif);
  font-size: 1.15rem;
  letter-spacing: 0.35em;
  padding-left: 4px;
}
.nav-menu { display: flex; gap: 40px; align-items: center; }
.nav-menu a {
  font-size: 0.85rem;
  letter-spacing: 0.28em;
  color: var(--ink-2);
  position: relative;
  padding: 6px 0;
  transition: color .3s;
}
.nav-menu a::after {
  content: ""; position: absolute; left: 0; bottom: 0;
  width: 0; height: 1px; background: var(--gold);
  transition: width .4s cubic-bezier(.2,.7,.3,1);
}
.nav-menu a:hover, .nav-menu a.active { color: var(--ink); }
.nav-menu a:hover::after, .nav-menu a.active::after { width: 100%; }
.nav-toggle { display: none; }

/* ---------- 通用 ---------- */
section { position: relative; }
.band { padding: 140px 0; }
.band-tight { padding: 100px 0; }
.band-paper { background: linear-gradient(180deg, #fbf7ed 0%, #f1ebdc 100%); }
.band-warm  { background: linear-gradient(180deg, #f7f1e2 0%, #ede4d0 100%); }
.band-mist  { background: linear-gradient(180deg, #f3efe7 0%, #e7e1d3 100%); }
.band-cool  { background: linear-gradient(180deg, #f6f4ee 0%, #ebe7dd 100%); }
body {
  background: linear-gradient(180deg, #fdfbf6 0%, #f6f1e6 100%) fixed;
}

.eyebrow {
  display: flex; align-items: center; gap: 14px;
  font-size: 0.72rem; letter-spacing: 0.34em;
  color: var(--gold); text-transform: uppercase;
  margin-bottom: 26px;
}
.eyebrow::before { content: ""; width: 34px; height: 1px; background: var(--gold); }

h2.title {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(1.6rem, 2.6vw, 2.15rem);
  line-height: 1.7;
  letter-spacing: 0.14em;
  margin: 0 0 26px;
}
p.lead { color: var(--ink-2); max-width: 40em; margin: 0 0 18px; }

.center { text-align: center; }
.center .eyebrow { justify-content: center; }
.center p.lead { margin-left: auto; margin-right: auto; }

.divider { width: 46px; height: 1px; background: var(--gold); margin: 34px 0; }
.center .divider { margin-left: auto; margin-right: auto; }

/* ---------- 占位图 ---------- */
.ph {
  position: relative;
  background: var(--paper);
  border: 1px solid var(--line);
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}
.ph span {
  font-size: 0.72rem; letter-spacing: 0.24em; color: var(--gray);
}
.ph::after {
  content: ""; position: absolute; inset: 14px;
  border: 1px solid rgba(200,200,200,.35);
  pointer-events: none;
}
.ph-1x1 { aspect-ratio: 1 / 1; }
.ph-4x5 { aspect-ratio: 4 / 5; }
.ph-3x4 { aspect-ratio: 3 / 4; }
.ph-16x9 { aspect-ratio: 16 / 9; }
.ph-2x3 { aspect-ratio: 2 / 3; }

/* ---------- 首屏 ---------- */
/* 背景四层可换肤：云霭(上) / 天光(高光) / 暗部(底部晕) / 天幕(基础渐变)
   通过 .hero-cold 覆盖同名变量切换为冷调阴云 */
.hero {
  position: relative;
  overflow: hidden;
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  text-align: center;
  padding: calc(var(--nav-h) + 100px) 0 140px;
  isolation: isolate;

  /* ── A · 暖灰米调（默认） ── */
  --hero-cloud: radial-gradient(46% 32% at 12% 20%, rgba(255,255,255,.55) 0%, rgba(255,255,255,0) 70%),
                radial-gradient(40% 26% at 76% 12%, rgba(255,255,255,.42) 0%, rgba(255,255,255,0) 70%),
                radial-gradient(56% 36% at 52% 32%, rgba(255,255,255,.25) 0%, rgba(255,255,255,0) 75%);
  --hero-glow: radial-gradient(70% 50% at 50% 14%, #fcfaf3 0%, rgba(252,250,243,0) 70%);
  --hero-deep: radial-gradient(120% 70% at 50% 110%, rgba(120,100,75,.16) 0%, rgba(120,100,75,0) 60%);
  --hero-sky:  linear-gradient(180deg, #f4eee3 0%, #e7dcc8 55%, #d3c5ad 100%);
  --hero-mtn: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1440 320' preserveAspectRatio='none'><path d='M0 240 L120 205 L260 230 L380 175 L520 215 L660 155 L820 200 L960 170 L1100 210 L1240 180 L1360 220 L1440 195 L1440 320 L0 320 Z' fill='%231a1a1a' fill-opacity='.55'/><path d='M0 270 L200 255 L360 268 L520 245 L680 262 L820 250 L980 268 L1140 252 L1300 268 L1440 258 L1440 320 L0 320 Z' fill='%231a1a1a' fill-opacity='.85'/></svg>");
  --hero-mtn-op: .10;

  background:
    var(--hero-cloud),
    var(--hero-glow),
    var(--hero-deep),
    var(--hero-sky);
}
.hero::before {
  /* 水墨远山（A 墨色 / B 冷蓝灰，随变量切换） */
  content: ""; position: absolute; left: 0; right: 0; bottom: 0;
  height: 46%;
  background: var(--hero-mtn) no-repeat bottom center / cover;
  opacity: var(--hero-mtn-op); z-index: 0; pointer-events: none;
}
.hero::after {
  /* 纸张颗粒，让背景不死板 */
  content: ""; position: absolute; inset: 0; z-index: 0; pointer-events: none;
  opacity: .045; mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='240' height='240'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0  0 0 0 0 0  0 0 0 0 0  0 0 0 .55 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
}

/* ── B · 冷调阴云天空（对比版） ──
   顶部阴云压顶 → 中段云隙透光 → 底部渐深，
   远山换冷蓝灰，颗粒感加强一点模拟云气 */
.hero.hero-cold {
  --hero-cloud: radial-gradient(55% 34% at 8% 16%, rgba(255,255,255,.62) 0%, rgba(255,255,255,0) 68%),
                radial-gradient(44% 28% at 66% 8%, rgba(255,255,255,.48) 0%, rgba(255,255,255,0) 70%),
                radial-gradient(58% 38% at 86% 26%, rgba(255,255,255,.30) 0%, rgba(255,255,255,0) 72%),
                radial-gradient(70% 44% at 24% 34%, rgba(255,255,255,.22) 0%, rgba(255,255,255,0) 74%);
  --hero-glow: radial-gradient(58% 42% at 50% 12%, rgba(255,255,255,.9) 0%, rgba(255,255,255,0) 62%);
  --hero-deep: radial-gradient(130% 80% at 50% 115%, rgba(43,53,65,.45) 0%, rgba(43,53,65,0) 56%);
  --hero-sky:  linear-gradient(180deg, #b6c0ca 0%, #cdd5dc 22%, #e4e9ed 46%, #c8d0d8 70%, #97a3ae 90%, #74808c 100%);
  --hero-mtn: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1440 320' preserveAspectRatio='none'><path d='M0 240 L120 205 L260 230 L380 175 L520 215 L660 155 L820 200 L960 170 L1100 210 L1240 180 L1360 220 L1440 195 L1440 320 L0 320 Z' fill='%233f4a57' fill-opacity='.65'/><path d='M0 270 L200 255 L360 268 L520 245 L680 262 L820 250 L980 268 L1140 252 L1300 268 L1440 258 L1440 320 L0 320 Z' fill='%23252c36' fill-opacity='.95'/></svg>");
  --hero-mtn-op: .16;
  --hero-fog: linear-gradient(180deg, rgba(230,235,239,0) 0%, rgba(230,235,239,.55) 46%, rgba(230,235,239,0) 62%);
  background:
    var(--hero-cloud),
    var(--hero-glow),
    var(--hero-fog, transparent),
    var(--hero-deep),
    var(--hero-sky);
}

/* 冷调版整站跟随（band 背景换冷灰蓝） */
body.tone-cold { background: linear-gradient(180deg, #f4f6f8 0%, #e6eaee 100%) fixed; }
body.tone-cold .band-cool  { background: linear-gradient(180deg, #eef1f4 0%, #dce2e7 100%); }
body.tone-cold .band-warm  { background: linear-gradient(180deg, #e6ebef 0%, #d2d9e0 100%); }
body.tone-cold .band-paper { background: linear-gradient(180deg, #f4f6f8 0%, #e8ecf0 100%); }
body.tone-cold .hero .meta-rule { background: rgba(26,32,38,.25); }
body.tone-cold .footer { background: transparent; }

/* 对比页角标 */
.cmp-tag {
  position: absolute; top: 30px; left: 50%; transform: translateX(-50%);
  z-index: 3;
  font-size: .66rem; letter-spacing: .3em; text-indent: .3em;
  color: var(--ink-2);
  background: rgba(255,255,255,.55);
  border: 1px solid rgba(26,26,26,.14);
  backdrop-filter: blur(6px);
  padding: 8px 22px;
  white-space: nowrap;
}
.cmp-hint {
  position: absolute; bottom: 26px; left: 0; right: 0; z-index: 3;
  text-align: center; font-size: .64rem; letter-spacing: .26em; color: var(--ink-2);
  opacity: .55;
}
.hero > * { position: relative; z-index: 1; }
.hero .eyebrow {
  justify-content: center; margin-bottom: 56px;
}
.hero h1 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(1.25rem, 1.9vw, 1.55rem);
  letter-spacing: 0.42em;
  line-height: 2.4;
  margin: 0 0 44px;
  text-indent: 0.42em;
  color: var(--ink);
}
.hero .sub {
  font-family: var(--serif);
  font-size: 0.95rem;
  letter-spacing: 0.3em;
  color: var(--ink-2);
  text-indent: 0.3em;
  margin: 0 0 70px;
}
.hero .meta-rule { width: 1px; height: 56px; background: rgba(26,26,26,.22); margin: 0 auto 22px; }
.hero .meta { font-size: 0.66rem; letter-spacing: 0.36em; color: var(--ink-2); margin: 0; }
.scroll-hint {
  position: absolute; left: 50%; bottom: 40px; transform: translateX(-50%);
  font-size: 0.64rem; letter-spacing: 0.3em; color: var(--ink-2);
  display: flex; flex-direction: column; align-items: center; gap: 12px;
  z-index: 2;
}
.scroll-hint i { display: block; width: 1px; height: 40px; background: linear-gradient(var(--ink-2), transparent); animation: drop 2.4s ease-in-out infinite; opacity: .35; }
@keyframes drop { 0%,100% { opacity:.2; transform: scaleY(.6); transform-origin: top; } 50% { opacity:.6; transform: scaleY(1); transform-origin: top; } }

/* ---------- 品牌 ---------- */
.brand-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 90px; align-items: center;
}
.brand-name-row { display: flex; gap: 46px; margin: 40px 0 8px; }
.brand-name {
  font-family: var(--serif); font-size: 3.2rem; line-height: 1;
  color: var(--ink);
}
.brand-name small {
  display: block; font-size: 0.7rem; letter-spacing: 0.24em;
  color: var(--gray); margin-top: 14px; font-family: var(--sans);
}
.brand-desc { color: var(--ink-2); }
.brand-desc strong { font-family: var(--serif); font-weight: 500; color: var(--ink); }

/* ---------- 器物 ---------- */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 56px 40px; }
.card { display: block; }
.card .ph { margin-bottom: 22px; transition: transform .8s cubic-bezier(.2,.7,.3,1), box-shadow .8s; }
.card:hover .ph { transform: translateY(-6px); box-shadow: 0 18px 40px rgba(0,0,0,.06); }
.card h3 {
  font-family: var(--serif); font-weight: 500; font-size: 1.05rem;
  letter-spacing: 0.16em; margin: 0 0 8px;
}
.card .desc { font-size: 0.86rem; color: var(--ink-2); letter-spacing: 0.08em; margin: 0; }
.card .more {
  display: inline-block; margin-top: 14px; font-size: 0.72rem;
  letter-spacing: 0.24em; color: var(--gold);
}
.card .more::after { content: " →"; }

/* ---------- 工艺 ---------- */
.craft-row {
  display: grid; grid-template-columns: 90px 240px 1fr; gap: 40px;
  align-items: start;
  padding: 42px 0; border-top: 1px solid var(--line);
}
.craft-row:last-child { border-bottom: 1px solid var(--line); }
.craft-no { font-family: var(--serif); font-size: 1.1rem; color: var(--gold); letter-spacing: .1em; }
.craft-t { font-family: var(--serif); font-size: 1.15rem; letter-spacing: 0.18em; }
.craft-d { color: var(--ink-2); font-size: 0.94rem; margin: 0; }

/* ---------- 静观 ---------- */
.quotes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 44px; }
.quote { border-left: 1px solid var(--gold); padding-left: 26px; }
.quote p {
  font-family: var(--serif); font-size: 1.02rem; line-height: 2.2;
  letter-spacing: 0.1em; margin: 0 0 16px; color: var(--ink);
}
.quote cite { font-style: normal; font-size: 0.74rem; letter-spacing: 0.2em; color: var(--gray); }

/* ---------- 尾注 ---------- */
.cta { text-align: center; }
.cta .line-btn {
  display: inline-block; margin-top: 34px;
  border: 1px solid var(--ink); padding: 15px 46px;
  font-size: 0.78rem; letter-spacing: 0.3em; text-indent: 0.3em;
  transition: background .4s, color .4s;
}
.cta .line-btn:hover { background: var(--ink); color: #fff; }

.footer { border-top: 1px solid var(--line); padding: 76px 0 40px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 60px; }
.footer h4 { font-size: 0.74rem; letter-spacing: 0.3em; color: var(--gray); font-weight: 400; margin: 0 0 20px; }
.footer ul { list-style: none; margin: 0; padding: 0; font-size: 0.88rem; color: var(--ink-2); }
.footer li { margin-bottom: 8px; }
.footer .f-logo { height: 62px; margin-bottom: 22px; }
.footer .f-word { font-family: var(--serif); font-size: 1.05rem; letter-spacing: 0.34em; }
.footer-bottom {
  margin-top: 60px; padding-top: 24px; border-top: 1px solid var(--line);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px;
  font-size: 0.72rem; letter-spacing: 0.16em; color: var(--gray);
}

/* ---------- 内页（商品详情） ---------- */
.page-head { padding: calc(var(--nav-h) + 90px) 0 70px; border-bottom: 1px solid var(--line); }
.crumb { font-size: 0.72rem; letter-spacing: 0.22em; color: var(--gray); margin-bottom: 30px; }
.crumb a:hover { color: var(--gold); }
.page-head h1 {
  font-family: var(--serif); font-weight: 400;
  font-size: clamp(1.7rem, 3vw, 2.4rem); letter-spacing: 0.2em; margin: 0 0 22px;
}
.prod { padding: 96px 0; border-bottom: 1px solid var(--line); }
.prod:last-of-type { border-bottom: none; }
.prod-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: start; }
.prod h3 { font-family: var(--serif); font-weight: 500; font-size: 1.4rem; letter-spacing: 0.18em; margin: 0 0 20px; }
.prod .tag { display: inline-block; font-size: 0.7rem; letter-spacing: 0.22em; color: var(--gold); border: 1px solid var(--gold); padding: 3px 12px; margin-bottom: 22px; }
.spec { width: 100%; border-collapse: collapse; margin-top: 30px; font-size: 0.88rem; }
.spec th, .spec td { text-align: left; padding: 14px 0; border-bottom: 1px solid var(--line); vertical-align: top; }
.spec th { width: 30%; font-weight: 400; color: var(--gray); letter-spacing: 0.18em; font-size: 0.78rem; }
.spec td { color: var(--ink-2); }
.spec .tbd { color: var(--gray); }

/* ---------- 动效 ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity 1s ease, transform 1s cubic-bezier(.2,.7,.3,1); }
.reveal.in { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 980px) {
  .brand-grid { grid-template-columns: 1fr; gap: 50px; }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .quotes { grid-template-columns: 1fr; gap: 34px; }
  .craft-row { grid-template-columns: 60px 1fr; gap: 12px 24px; }
  .craft-d { grid-column: 2; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .prod-inner { grid-template-columns: 1fr; gap: 40px; }
}
@media (max-width: 720px) {
  .wrap { padding: 0 24px; }
  .band { padding: 90px 0; }
  .nav-menu {
    position: fixed; top: var(--nav-h); left: 0; right: 0;
    background: var(--bg); border-bottom: 1px solid var(--line);
    flex-direction: column; gap: 0; padding: 8px 24px 20px;
    display: none;
  }
  .nav-menu.open { display: flex; }
  .nav-menu a { padding: 14px 0; width: 100%; border-bottom: 1px solid var(--line); }
  .nav-toggle { display: block; background: none; border: none; font-size: 0.8rem; letter-spacing: .2em; color: var(--ink); cursor: pointer; }
  .grid-3 { grid-template-columns: 1fr; gap: 46px; }
  .footer-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero-logo { height: 150px; }
}