/* ============ 紫衡 ZiHeng — 紙本水墨 ============ */
/* 榜書字體按實際用字子集化自托管(129 字形 / 16KB,免 Google 切片 CSS);
   Ma Shan Zheng 為簡體字庫,缺 規/頁/無/蹤 — 由文楷子集逐字形補齊 */
@font-face{
  font-family:"Ma Shan Zheng";
  src:url("/fonts/msz-ziheng.woff2") format("woff2");
  font-style:normal;font-weight:400;font-display:swap;
}
@font-face{
  font-family:"ZiHeng Kai";
  src:url("/fonts/wk-fill.woff2") format("woff2");
  font-style:normal;font-weight:400;font-display:swap;
}
:root{
  --paper:#F4F1E8;
  --paper-deep:#ECE7D9;
  --jiao:#171410;   /* 焦墨 */
  --nong:#2A2620;   /* 濃墨 */
  --zhong:#575046;  /* 重墨 */
  --dan:#A79E8F;    /* 淡墨(仅装饰,不用作文字) */
  --dan-text:#6E675C; /* 淡墨文字级(AA 达标) */
  --qing:#CFC9B9;   /* 清墨 */
  --zhu:#A93226;    /* 朱砂 */
  --azur:#33505E;   /* 石青 */
  --serif-zh:"Noto Serif TC", "Songti TC", serif;
  --serif-en:"Cormorant Garamond", "Noto Serif TC", serif;
  --brush:"Ma Shan Zheng", "ZiHeng Kai", "Noto Serif TC", serif;
  --pad:clamp(1.25rem, 4vw, 4rem);
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
section{scroll-margin-top:4.5rem}
body{
  background:var(--paper);
  color:var(--nong);
  font-family:var(--serif-zh);
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
/* 宣紙紋理 */
body::before{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;opacity:.55;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='240' height='240'%3E%3Cfilter id='p'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 0.45 0 0 0 0 0.42 0 0 0 0 0.36 0 0 0 0.05 0'/%3E%3C/filter%3E%3Crect width='240' height='240' filter='url(%23p)'/%3E%3C/svg%3E");
}
/* 邊緣暈影 */
body::after{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background:radial-gradient(ellipse 120% 100% at 50% 40%, transparent 60%, rgba(87,80,70,.10) 100%);
}
main,footer,header{position:relative;z-index:1}

html[data-lang="zh"] .l-en{display:none}
html[data-lang="en"] .l-zh{display:none}
html[data-lang="en"] body{font-family:var(--serif-en)}
html[data-lang="en"] .prod-name,html[data-lang="en"] .sec-title,html[data-lang="en"] .hero-tag{font-family:var(--serif-en)}
.l-en{font-family:var(--serif-en)}
b,strong{font-weight:600;color:var(--jiao)}

.skip{position:absolute;left:-999px;top:0;background:var(--jiao);color:var(--paper);padding:.6rem 1rem;z-index:99}
.skip:focus{left:0}
a{color:inherit}
:focus-visible{outline:2px solid var(--zhu);outline-offset:3px}

/* ============ 印章 ============ */
.seal{
  display:inline-grid;place-items:center;
  background:var(--zhu);color:#F6EFE3;
  font-family:var(--brush);
  border-radius:18% 22% 20% 24%;
  transform:rotate(-4deg);
  box-shadow:0 1px 0 rgba(23,20,16,.35), inset 0 0 0 .12em rgba(246,239,227,.28);
  line-height:1;user-select:none;
}
.seal-s{width:2.4rem;height:2.4rem;font-size:1.35rem}
.seal-l{width:clamp(4.2rem,7vw,5.6rem);height:clamp(4.2rem,7vw,5.6rem);font-size:clamp(2.4rem,4vw,3.2rem)}

/* ============ 頂欄 ============ */
.site-head{
  position:fixed;top:0;left:0;right:0;z-index:50;
  display:flex;align-items:center;gap:2rem;
  padding:.9rem var(--pad);
  background:linear-gradient(to bottom, rgba(244,241,232,.92), rgba(244,241,232,0));
  transition:background .3s;
}
.site-head.scrolled{background:rgba(244,241,232,.94);box-shadow:0 1px 0 var(--qing)}
.brand{display:flex;align-items:center;gap:.7rem;text-decoration:none}
.brand-t{line-height:1.15}
.brand-t b{display:block;font-size:1.15rem;color:var(--jiao);letter-spacing:.08em}
.brand-t i{font-style:normal;font-size:.72rem;color:var(--zhong);letter-spacing:.34em}
.site-nav{display:flex;gap:1.6rem;margin-left:auto}
.site-nav a{
  text-decoration:none;font-size:.92rem;color:var(--zhong);
  border-bottom:1px solid transparent;padding-bottom:2px;transition:color .2s,border-color .2s;
}
.site-nav a:hover{color:var(--jiao);border-color:var(--zhu)}
.site-nav a.active{color:var(--jiao);border-color:var(--zhu)}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.lang-toggle{
  font-family:var(--serif-en);font-size:.85rem;letter-spacing:.12em;
  background:none;border:1px solid var(--dan);color:var(--zhong);
  border-radius:999px;padding:.32rem .9rem;cursor:pointer;transition:all .2s;
  text-decoration:none;display:inline-block;
}
.lang-toggle:hover{border-color:var(--jiao);color:var(--jiao)}

/* ============ 經絡線(頁進度) ============ */
.spine{
  position:fixed;left:clamp(.7rem,1.6vw,1.4rem);top:0;bottom:0;width:2px;z-index:40;
  background:var(--qing);
}
.spine-fill{
  display:block;width:100%;height:100%;
  background:linear-gradient(to bottom, var(--nong), var(--jiao));
  transform-origin:top;transform:scaleY(0);
}
@media (max-width:860px){.spine{display:none}}

/* ============ HERO ============ */
.hero{
  min-height:100vh;min-height:100svh;display:flex;flex-direction:column;justify-content:center;
  padding:6rem var(--pad) 4rem;position:relative;overflow:hidden;
}
.hero-ink{
  position:absolute;top:8%;right:-6%;width:min(58vw,42rem);height:min(58vw,42rem);
  background:radial-gradient(circle at 42% 44%, rgba(42,38,32,.30) 0%, rgba(42,38,32,.14) 34%, rgba(42,38,32,.05) 52%, transparent 66%);
  filter:blur(2px);
  transform:scale(0);border-radius:48% 52% 55% 45%/52% 46% 54% 48%;
}
.hero-char{
  position:absolute;top:0;bottom:0;right:clamp(-2rem,2vw,4rem);
  display:flex;align-items:center;
  font-family:var(--brush);font-size:clamp(16rem,38vw,34rem);line-height:1;
  color:var(--jiao);opacity:0;
  text-shadow:0 0 1px rgba(23,20,16,.4);
}
.hero-body{max-width:46rem;position:relative}
.hero-kicker{
  font-size:.85rem;letter-spacing:.5em;color:var(--zhong);margin-bottom:1.8rem;
}
.hero-title{display:flex;align-items:baseline;flex-wrap:wrap;gap:.4rem;line-height:.95}
.hero-zi{
  font-family:var(--brush);font-weight:400;
  font-size:clamp(5rem,12vw,9.5rem);color:var(--jiao);
  display:inline-block;
}
.hero-zi + .hero-zi{margin-right:1.2rem}
.hero-en{
  font-family:var(--serif-en);font-weight:500;font-size:clamp(1rem,2.2vw,1.5rem);
  letter-spacing:.42em;color:var(--zhong);align-self:flex-end;padding-bottom:.9rem;
}
.hero-stroke{width:min(100%,34rem);height:2.4rem;color:var(--zhu);margin:.4rem 0 1.6rem -.6rem;opacity:.9}
.hero-stroke path{stroke-dasharray:620;stroke-dashoffset:620}
.hero-tag{
  font-size:clamp(1.5rem,3.4vw,2.3rem);font-weight:600;color:var(--jiao);
  line-height:1.5;margin-bottom:1rem;
}
.hero-sub{font-size:1.05rem;color:var(--zhong);max-width:34rem}
.scroll-cue{
  position:absolute;bottom:2rem;left:var(--pad);
  display:flex;align-items:center;gap:.55rem;
  font-size:.8rem;letter-spacing:.3em;color:var(--dan-text);text-decoration:none;
}
.scroll-cue svg{animation:cue 2.2s ease-in-out infinite}
@keyframes cue{0%,100%{transform:translateY(-2px)}50%{transform:translateY(4px)}}

/* ============ 通用板塊 ============ */
section{position:relative}
.sec-mark{
  position:absolute;top:-1.2rem;right:var(--pad);
  writing-mode:vertical-rl;font-size:.8rem;letter-spacing:.6em;
  color:var(--dan);border-left:1px solid var(--qing);padding-left:.5rem;height:6.5rem;
  user-select:none;
}
.sec-title{
  font-size:clamp(1.9rem,4.4vw,3rem);font-weight:900;color:var(--jiao);
  line-height:1.35;margin-bottom:3rem;
}
.ink-div{display:block;width:100%;height:3.6rem;color:var(--dan);opacity:.65}
.ink-div .ink-path{stroke-dasharray:1300;stroke-dashoffset:1300}
.ink-div.flip{transform:scaleX(-1)}

/* ============ 集團 ============ */
.house{padding:7rem var(--pad) 6rem;max-width:72rem;margin:0 auto}
.house-line{font-size:clamp(1.35rem,2.8vw,1.9rem);line-height:2.1;color:var(--nong);max-width:46rem}
.house-punch{max-width:46rem}
.house-punch{
  margin-top:2.2rem;font-size:clamp(1.6rem,3.4vw,2.5rem);font-weight:900;
  color:var(--jiao);line-height:1.6;
}
.house-punch em{
  font-style:normal;color:var(--zhu);
  box-shadow:inset 0 -0.14em 0 var(--qing);
}
.house-triad{
  margin-top:4rem;display:grid;grid-template-columns:repeat(3,1fr);
  gap:clamp(1.6rem,3.5vw,3rem);max-width:72rem;
}
.triad{border-top:2px solid var(--jiao);padding-top:1.1rem}
.triad-label{
  font-size:.95rem;font-weight:700;letter-spacing:.5em;color:var(--dan-text);
  margin:0 0 .9rem;text-transform:uppercase;
}
.triad-label .l-en{letter-spacing:.28em}
.triad p{margin:0;font-size:1.02rem;line-height:1.9;color:var(--nong)}
.triad ul{margin:0;padding:0;list-style:none}
.triad li{font-size:1.02rem;line-height:1.9;color:var(--nong);padding:.28rem 0}
.triad li b{color:var(--jiao)}

/* ============ 產品 ============ */
.products{padding:6rem var(--pad) 5rem;max-width:72rem;margin:0 auto}
.prod-list{position:relative}
.prod-spine{
  position:absolute;left:calc(clamp(4.2rem,7vw,5.6rem)/2);top:3rem;bottom:3rem;width:2px;
  background:var(--qing);
}
.prod-spine span{display:block;width:100%;height:100%;background:var(--nong);transform-origin:top;transform:scaleY(0)}
.prod{
  display:flex;gap:clamp(1.4rem,3.5vw,3rem);align-items:flex-start;
  padding:3.2rem 0;position:relative;
}
.prod + .prod{border-top:1px solid var(--paper-deep)}
.prod-seal-col{flex-shrink:0;position:relative;z-index:2}
.prod-name{
  font-size:clamp(1.7rem,3.4vw,2.5rem);font-weight:900;color:var(--jiao);
  line-height:1.3;
}
.prod-role{
  font-size:.95rem;color:var(--azur);margin:.3rem 0 1.1rem;letter-spacing:.06em;
}
.prod-desc{max-width:38rem;color:var(--nong);margin-bottom:1.3rem}
.prod-stats{
  list-style:none;display:flex;flex-wrap:wrap;gap:.55rem;margin-bottom:1.4rem;
}
.prod-stats li{
  font-size:.82rem;color:var(--zhong);
  border:1px solid var(--qing);border-radius:2px;padding:.28rem .75rem;
  background:rgba(255,255,255,.35);
}
.prod-cta{
  display:inline-block;
  font-weight:600;color:var(--jiao);text-decoration:none;padding-bottom:5px;
  background:linear-gradient(var(--zhu),var(--zhu)) no-repeat left bottom/0% 2px,
             linear-gradient(var(--qing),var(--qing)) no-repeat left bottom/100% 1px;
  transition:background-size .35s ease,color .2s;
}
.prod-cta:hover{color:var(--zhu);background-size:100% 2px,100% 1px}
.prod-sub{
  display:inline-block;margin-left:1.4rem;font-size:.92rem;color:var(--dan-text);
  text-decoration:none;padding-bottom:4px;
  border-bottom:1px solid var(--paper-deep);
  transition:color .2s,border-color .25s;
}
.prod-sub:hover{color:var(--zhu);border-color:var(--zhu)}

/* ============ 近訊 ============ */
.weekly{padding:6rem var(--pad) 7rem;max-width:72rem;margin:0 auto}
.wrows{display:flex;flex-direction:column}
.wrow{
  display:flex;align-items:baseline;gap:clamp(1rem,3vw,2.5rem);
  padding:1.35rem 0;border-top:1px solid var(--qing);
  text-decoration:none;color:inherit;
}
.wrow:last-child{border-bottom:1px solid var(--qing)}
.wrow-tag{
  flex:0 0 auto;min-width:4.4em;font-size:.76rem;letter-spacing:.3em;
  color:var(--dan-text);border:1px solid var(--paper-deep);
  padding:.3em .7em .3em 1em;text-align:center;
  transition:color .2s,border-color .25s;
}
html[data-lang="en"] .wrow-tag{letter-spacing:.18em}
.wrow-body{flex:1;font-size:1rem;line-height:1.85;color:var(--nong)}
.wrow-body b{color:var(--jiao)}
.wrow-go{color:var(--zhong);transition:transform .25s ease,color .2s}
.wrow:hover .wrow-tag{color:var(--zhu);border-color:var(--zhu)}
.wrow:hover .wrow-go{transform:translateX(6px);color:var(--zhu)}

/* ============ 驗證 ============ */
.discipline{padding:6rem var(--pad) 7rem;max-width:72rem;margin:0 auto}
.disc-grid{
  display:grid;grid-template-columns:repeat(3,1fr);
  gap:clamp(1.5rem,3.5vw,3rem);
}
.disc{
  border-top:2px solid var(--jiao);padding-top:1.4rem;
}
.disc-head{
  font-family:var(--brush);font-weight:400;
  font-size:clamp(1.7rem,3vw,2.4rem);color:var(--jiao);line-height:1.3;
  margin-bottom:.9rem;
}
.disc-body{font-size:.95rem;color:var(--zhong)}

/* ============ 問答 ============ */
.faq{padding:6rem var(--pad) 7rem;max-width:72rem;margin:0 auto}
.faq-list{max-width:52rem}
.faq-i{border-bottom:1px solid var(--qing)}
.faq-i:first-child{border-top:1px solid var(--qing)}
.faq-i summary{
  display:flex;justify-content:space-between;align-items:baseline;gap:1.2rem;
  padding:1.35rem .1rem;cursor:pointer;list-style:none;
  font-size:1.05rem;color:var(--jiao);transition:color .2s;
}
.faq-i summary::-webkit-details-marker{display:none}
.faq-i summary::after{
  content:"＋";flex:none;font-size:.95rem;color:var(--dan-text);
  transition:transform .3s,color .2s;
}
.faq-i[open] summary::after{transform:rotate(45deg);color:var(--zhu)}
.faq-i summary:hover{color:var(--zhu)}
.faq-i summary:hover::after{color:var(--zhu)}
.faq-i p{
  margin:0;padding:0 .1rem 1.7rem;
  font-size:.92rem;line-height:2;color:var(--zhong);max-width:64ch;
}

/* ============ 3D 景深 ============ */
.tilt3d{transform-style:preserve-3d;transition:transform .3s ease;will-change:transform}
.tilt3d .prod-seal-col{transform:translateZ(46px)}
.tilt3d .disc-head{transform:translateZ(26px)}

/* ============ 頁腳 ============ */
.site-foot{
  border-top:1px solid var(--qing);
  padding:3.5rem var(--pad) 3rem;
  display:flex;flex-wrap:wrap;gap:2rem;align-items:flex-start;justify-content:space-between;
}
.foot-brand{display:flex;gap:.9rem;align-items:center}
.foot-brand b{font-size:1.1rem;color:var(--jiao);letter-spacing:.08em}
.foot-brand p{font-size:.85rem;color:var(--dan-text);line-height:1.5}
.foot-links{display:flex;gap:1.8rem;flex-wrap:wrap}
.foot-links a{
  font-size:.95rem;color:var(--zhong);text-decoration:none;
  border-bottom:1px solid transparent;transition:all .2s;
}
.foot-links a:hover{color:var(--jiao);border-color:var(--zhu)}
.foot-share{width:100%;display:flex;flex-wrap:wrap;align-items:center;gap:1rem;
  border-top:1px solid var(--qing);padding-top:1.6rem}
.foot-share-q{margin:0;font-size:.85rem;color:var(--dan-text)}
.foot-share-a{display:flex;gap:.6rem;flex-wrap:wrap}
.foot-share-a a,.foot-share-a button{
  font-family:inherit;font-size:.82rem;color:var(--zhong);
  background:none;border:1px solid var(--qing);padding:.32em .85em;
  text-decoration:none;cursor:pointer;transition:color .2s,border-color .25s;
}
.foot-share-a a:hover,.foot-share-a button:hover{color:var(--zhu);border-color:var(--zhu)}
.foot-share-a button.done::after{content:" ✓";color:var(--zhu)}
.foot-note{width:100%;font-size:.8rem;color:var(--dan-text);margin-top:1rem}

/* ============ 響應式 ============ */
@media (max-width:860px){
  .site-nav{display:none}
  .hero-char{right:-14%;opacity:.9}
  .hero-ink{right:-40%;width:100vw}
  .prod{flex-direction:row}
  .prod-spine{left:calc(clamp(4.2rem,7vw,5.6rem)/2)}
  .disc-grid{grid-template-columns:1fr;gap:2.4rem}
  .house-triad{grid-template-columns:1fr;gap:2rem}
  .sec-mark{position:static;writing-mode:horizontal-tb;height:auto;border-left:none;border-bottom:1px solid var(--qing);padding:0 0 .4rem;margin-bottom:1.4rem;letter-spacing:.4em}
}
@media (max-width:560px){
  .prod{flex-direction:column;gap:1.2rem}
  .prod-spine{display:none}
  .hero{padding-top:5rem}
}

/* ============ 減動態 ============ */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .scroll-cue svg{animation:none}
  .hero-ink{transform:scale(1)}
  .hero-char{opacity:.9}
  .hero-stroke path{stroke-dashoffset:0}
  .ink-div .ink-path{stroke-dashoffset:0}
  .spine-fill{transform:scaleY(1)}
  .prod-spine span{transform:scaleY(1)}
}

/* ============ 打印 ============ */
@media print{
  .site-head,.spine,.prod-spine,.scroll-cue,.hero-ink,.hero-char,.sec-mark{display:none}
  body{background:#fff}
  .hero{min-height:0;padding:2rem 0}
  .hero-zi,.sec-title,.disc-head,.prod-name{break-after:avoid}
  .prod,.disc{break-inside:avoid}
}