/* ============================================================
   和纸屋 WASHIYA · washiya.cn
   视觉：暖米白 · 大留白 · 宋体标题 + 黑体正文 + Jost 西文
   ============================================================ */

:root{
  --paper:#F4F0E8;        /* 主背景 暖米白 */
  --paper-soft:#FAF8F2;   /* 区块/卡片 更浅暖白 */
  --paper-deep:#ECE6D9;   /* 略深底纹 */
  --ink:#221D16;          /* 主文字 暖墨黑 */
  --ink-soft:#6F665A;     /* 次文字 暖灰 */
  --ink-faint:#9A9081;    /* 极淡文字/标注 */
  --line:#D9D1C2;         /* 分隔线 */
  --line-soft:#E6DFD2;

  --serif:'Noto Serif SC','Songti SC','STSong',serif;
  --sans:'Noto Sans SC','PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;
  --west:'Jost','Helvetica Neue',Arial,sans-serif;

  --wrap:1160px;
  --narrow:760px;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  font-weight:300;
  line-height:1.85;
  font-size:16.5px;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}

/* ---------- 容器 ---------- */
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 32px}
.narrow{max-width:var(--narrow);margin:0 auto;padding:0 32px}

/* ---------- 排版 ---------- */
h1,h2,h3,h4{font-family:var(--serif);font-weight:400;line-height:1.35;letter-spacing:.02em}
h1{font-size:2.5rem;font-weight:300}
h2{font-size:1.9rem;font-weight:300}
h3{font-size:1.3rem}
p{margin:0 0 1.2em}
strong{font-weight:500}

.eyebrow{
  font-family:var(--west);
  text-transform:uppercase;
  letter-spacing:.32em;
  font-size:.72rem;
  font-weight:400;
  color:var(--ink-faint);
  display:block;
  margin-bottom:1.4em;
}
.romaji{font-family:var(--west);letter-spacing:.06em;color:var(--ink-soft);font-weight:400}
.west{font-family:var(--west);letter-spacing:.04em}

/* signature：细毛边分隔线（呼应和纸"耳付"毛边 / 流漉水纹） */
.wave{
  width:54px;height:8px;margin:0 0 0;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='54' height='8' viewBox='0 0 54 8'%3E%3Cpath d='M0 4 C 6 0, 12 8, 18 4 S 30 0, 36 4 S 48 8, 54 4' fill='none' stroke='%23B9AE9A' stroke-width='1'/%3E%3C/svg%3E");
  background-repeat:no-repeat;
}
.wave.center{margin-left:auto;margin-right:auto}

/* ---------- 顶部导航 ---------- */
header.site{
  position:sticky;top:0;z-index:50;
  background:rgba(244,240,232,.88);
  backdrop-filter:saturate(120%) blur(8px);
  border-bottom:1px solid var(--line-soft);
}
.nav{display:flex;align-items:center;justify-content:space-between;height:74px}
.brand{display:flex;flex-direction:column;line-height:1}
.brand .cn{font-family:var(--serif);font-size:1.32rem;letter-spacing:.16em;font-weight:400}
.brand .en{font-family:var(--west);font-size:.6rem;letter-spacing:.42em;color:var(--ink-faint);margin-top:5px;text-transform:uppercase}
.nav-links{display:flex;gap:34px;align-items:center}
.nav-links a{
  font-size:.92rem;letter-spacing:.08em;color:var(--ink-soft);
  padding:4px 0;position:relative;transition:color .2s;
}
.nav-links a:hover,.nav-links a[aria-current="page"]{color:var(--ink)}
.nav-links a[aria-current="page"]::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:1px;background:var(--ink);
}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;font-family:var(--west);letter-spacing:.1em;font-size:.85rem;color:var(--ink)}

/* ---------- HERO ---------- */
.hero{position:relative;height:78vh;min-height:480px;max-height:760px;display:flex;align-items:center;justify-content:center;overflow:hidden}
.hero img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.hero .veil{position:absolute;inset:0;background:linear-gradient(180deg,rgba(244,240,232,.25),rgba(244,240,232,.05) 35%,rgba(40,34,26,.12))}
.hero .inner{position:relative;text-align:center;padding:0 28px;max-width:780px}
.hero h1{font-size:2.5rem;font-weight:300;letter-spacing:.06em;line-height:1.5;color:var(--ink)}
.hero .tag{font-family:var(--west);letter-spacing:.3em;text-transform:uppercase;font-size:.74rem;color:var(--ink-soft);margin-top:22px}

/* 小页眉 hero（内页） */
.pagehead{padding:84px 0 18px;text-align:center}
.pagehead h1{font-size:2.1rem}
.pagehead .lede{max-width:620px;margin:18px auto 0;color:var(--ink-soft);font-size:1.02rem}

/* ---------- 区块 ---------- */
section{padding:78px 0}
section.tight{padding:52px 0}
.lead-statement{font-family:var(--serif);font-weight:300;font-size:1.5rem;line-height:1.85;letter-spacing:.02em}
.muted{color:var(--ink-soft)}
.center{text-align:center}
.divider{height:1px;background:var(--line);border:0;margin:0}

/* ---------- 三入口 / 卡片 grid ---------- */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:30px}
.cards.two{grid-template-columns:repeat(2,1fr)}
.card{background:var(--paper-soft);border:1px solid var(--line-soft);display:flex;flex-direction:column}
.card .ph{aspect-ratio:4/5;overflow:hidden;background:var(--paper-deep)}
.card .ph img{width:100%;height:100%;object-fit:cover;transition:transform .9s ease}
.product-card--portrait .ph{aspect-ratio:2/3}
.product-card--landscape .ph{aspect-ratio:3/2}
.product-card .ph img{object-fit:contain}
.card:hover .ph img{transform:scale(1.04)}

/* Translucent series product grid */
#series-products{
  width:min(calc(100vw - 64px),var(--wrap));
  margin-left:50%;
  transform:translateX(-50%);
  grid-template-columns:repeat(4,minmax(0,1fr));
  column-gap:28px;
  row-gap:42px;
}
.card .body{padding:26px 26px 30px}
.card h3{margin-bottom:8px}
.card .romaji{font-size:.82rem;display:block;margin-bottom:14px}
.card p{font-size:.95rem;color:var(--ink-soft);margin-bottom:18px}
.card .more{font-family:var(--west);letter-spacing:.12em;font-size:.8rem;text-transform:uppercase;color:var(--ink);border-bottom:1px solid var(--ink);padding-bottom:3px}

/* 服务谁 / 标签行 */
.tagrow{display:flex;flex-wrap:wrap;justify-content:center;gap:14px 30px;color:var(--ink-soft);font-size:1rem}
.tagrow span{position:relative;padding-left:0}

/* 三点理由 */
.reasons{display:grid;grid-template-columns:repeat(3,1fr);gap:48px}
.reason h3{font-size:1.15rem;margin-bottom:12px}
.reason .num{font-family:var(--west);color:var(--ink-faint);letter-spacing:.2em;font-size:.72rem;text-transform:uppercase;display:block;margin-bottom:14px}
.reason p{font-size:.95rem;color:var(--ink-soft);margin:0}

/* ---------- 产品系列页 ---------- */
.series-hero{display:grid;grid-template-columns:1.05fr 1fr;gap:0;align-items:stretch;border:1px solid var(--line-soft);background:var(--paper-soft);margin-top:8px}
.series-hero .txt{padding:56px 52px}
.series-hero .img{min-height:360px;background:var(--paper-deep)}
.series-hero .img img{width:100%;height:100%;object-fit:cover}

/* 单款产品卡片 */
.swatches{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.swatch .ph{aspect-ratio:3/4;overflow:hidden;background:var(--paper-deep);border:1px solid var(--line-soft)}
.swatch .ph img{width:100%;height:100%;object-fit:cover}
.swatch h4{font-size:1.05rem;margin:16px 0 4px}
.swatch .romaji{font-size:.76rem;display:block;margin-bottom:8px}
.swatch p{font-size:.88rem;color:var(--ink-soft);margin:0;line-height:1.7}

/* 规格块 */
.spec{border-top:1px solid var(--line);margin-top:46px;padding-top:30px}
.spec dl{display:grid;grid-template-columns:120px 1fr;gap:14px 28px}
.spec dt{font-family:var(--west);letter-spacing:.1em;font-size:.78rem;text-transform:uppercase;color:var(--ink-faint);padding-top:2px}
.spec dd{color:var(--ink-soft);font-size:.96rem}
.note{font-size:.85rem;color:var(--ink-faint);font-style:normal;margin-top:24px;line-height:1.7}

/* 产品数据占位区块 */
.placeholder{border:1px dashed var(--line);background:var(--paper-soft);padding:40px;text-align:center;color:var(--ink-soft);font-size:.95rem}
.placeholder .romaji{display:block;margin-bottom:10px;color:var(--ink-faint)}

/* ---------- 知识库 ---------- */
.toc{border:1px solid var(--line-soft);background:var(--paper-soft);padding:30px 34px;margin:0 0 0}
.toc .eyebrow{margin-bottom:18px}
.toc ol{list-style:none;counter-reset:t}
.toc li{counter-increment:t;padding:9px 0;border-bottom:1px solid var(--line-soft)}
.toc li:last-child{border-bottom:0}
.toc li a{display:flex;gap:16px;align-items:baseline;color:var(--ink);font-size:1rem}
.toc li a:hover{color:var(--ink-soft)}
.toc li a::before{content:counter(t,decimal-leading-zero);font-family:var(--west);color:var(--ink-faint);font-size:.78rem;letter-spacing:.1em;min-width:24px}
.article{padding-top:70px}
.article h2{font-size:1.7rem;margin-bottom:6px}
.article .romaji{display:block;margin-bottom:26px;font-size:.82rem}
.article h3{font-size:1.12rem;margin:32px 0 10px}
.article p{color:#3a352c}
.article .qa{margin-top:18px}
.article .qa .q{font-weight:500;color:var(--ink);margin-bottom:4px}
.article .qa .a{color:var(--ink-soft);margin-bottom:20px}

/* ---------- 服务流程 ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:30px;margin-top:10px}
.step .num{font-family:var(--west);font-size:1.4rem;color:var(--ink-faint);letter-spacing:.05em}
.step h3{font-size:1.08rem;margin:14px 0 8px}
.step p{font-size:.92rem;color:var(--ink-soft);margin:0}

/* ---------- 联系 ---------- */
.contact-grid{display:grid;grid-template-columns:130px 1fr;gap:18px 30px;max-width:560px}
.contact-grid dt{font-family:var(--west);letter-spacing:.1em;font-size:.78rem;text-transform:uppercase;color:var(--ink-faint);padding-top:4px}
.contact-grid dd{font-size:1.05rem}

/* ---------- 通用 CTA 行 ---------- */
.cta-line{text-align:center;padding:8px 0 0}
.btn{
  display:inline-block;font-family:var(--west);letter-spacing:.14em;text-transform:uppercase;
  font-size:.82rem;border:1px solid var(--ink);padding:15px 34px;color:var(--ink);
  transition:background .25s,color .25s;
}
.btn:hover{background:var(--ink);color:var(--paper)}

/* ---------- 页脚 ---------- */
footer.site{border-top:1px solid var(--line);background:var(--paper-deep);padding:60px 0 40px;margin-top:20px}
.foot{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px}
.foot .brand .cn{font-size:1.2rem}
.foot p{font-size:.88rem;color:var(--ink-soft);margin:14px 0 0;max-width:320px}
.foot h4{font-family:var(--west);font-weight:500;text-transform:uppercase;letter-spacing:.18em;font-size:.7rem;color:var(--ink-faint);margin-bottom:16px}
.foot ul{list-style:none}
.foot li{margin-bottom:10px}
.foot a{font-size:.9rem;color:var(--ink-soft)}
.foot a:hover{color:var(--ink)}
.foot-base{margin-top:44px;padding-top:22px;border-top:1px solid var(--line);display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:.78rem;color:var(--ink-faint)}
.foot-base .west{letter-spacing:.1em}

/* ---------- 响应式 ---------- */
@media (max-width:1200px){
  #series-products{
    width:min(calc(100vw - 64px),940px);
    grid-template-columns:repeat(3,minmax(0,1fr));
    row-gap:38px;
  }
}
@media (max-width:980px){
  #series-products{
    width:100%;
    margin-left:0;
    transform:none;
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:30px;
  }
}
@media (max-width:880px){
  h1{font-size:2rem}.hero h1{font-size:1.7rem;line-height:1.55}
  .cards,.cards.two,.reasons,.swatches,.steps{grid-template-columns:1fr 1fr}
  .series-hero{grid-template-columns:1fr}.series-hero .img{min-height:280px;order:-1}
  .foot{grid-template-columns:1fr 1fr}
}
@media (max-width:600px){
  body{font-size:16px}
  .wrap,.narrow{padding:0 22px}
  .nav-links{
    display:none;position:absolute;top:74px;left:0;right:0;flex-direction:column;
    gap:0;background:var(--paper);border-bottom:1px solid var(--line);padding:8px 22px 18px;
  }
  .nav-links.open{display:flex}
  .nav-links a{padding:13px 0;border-bottom:1px solid var(--line-soft);width:100%}
  .nav-toggle{display:block}
  .cards,.cards.two,.reasons,.swatches,.steps,.foot,.spec dl,.contact-grid{grid-template-columns:1fr}
  #series-products{grid-template-columns:1fr;gap:30px}
  section{padding:54px 0}
  .hero{height:64vh}
  .series-hero .txt{padding:38px 26px}
  .lead-statement{font-size:1.25rem}
}

/* 可达性 */
a:focus-visible,button:focus-visible{outline:2px solid var(--ink);outline-offset:3px}
@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}