/* ============================================================
   大恆智慧 Da Heng Intelligence — v2
   Aesthetic: editorial, light, generous whitespace, refined type
   Palette: warm paper + near-black ink + restrained teal accent
   Type: Noto Serif TC (display, heavy) / Inter+Noto Sans TC (body)
   Signature: gaze-trail hairline + serif numerals as structure
   ============================================================ */

:root{
  --paper:#faf8f3;
  --paper-2:#f3f0e8;
  --paper-3:#ece8dd;
  --ink:#16150f;
  --ink-2:#3a382f;
  --ink-soft:#6b6759;
  --ink-faint:#a8a394;
  --line:#dcd7c9;
  --line-soft:#e7e3d8;
  --teal:#1f6f6a;       /* restrained clinical teal — the one accent */
  --teal-bright:#2a8f88;
  --teal-wash:#eef4f2;
  --white:#ffffff;

  --maxw:1280px;
  --gut:clamp(22px,6vw,90px);

  --serif:"Noto Serif TC",serif;
  --sans:"Inter","Noto Sans TC",system-ui,sans-serif;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--sans);
  background:var(--paper);
  color:var(--ink);
  line-height:1.72;
  font-weight:400;
  letter-spacing:.005em;
  overflow-x:hidden;
  font-feature-settings:"palt" 1;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
::selection{background:var(--teal);color:var(--paper)}

/* ---------------- type ---------------- */
.display{font-family:var(--serif);font-weight:900;line-height:1.42;letter-spacing:.005em;color:var(--ink)}
h1.display{font-size:clamp(2.4rem,6vw,5rem);line-height:1.32}
h2.display{font-size:clamp(1.85rem,4.1vw,3.2rem);line-height:1.38}
h3.display{font-size:clamp(1.4rem,2.5vw,2rem);line-height:1.4}
.serif{font-family:var(--serif)}
.eyebrow{
  font-size:.72rem;letter-spacing:.34em;text-transform:uppercase;
  color:var(--teal);font-weight:600;display:inline-flex;align-items:center;gap:.85em;
}
.eyebrow.num{color:var(--ink-faint)}
.eyebrow .no{font-family:var(--serif);font-style:italic;font-weight:700;font-size:1.05rem;color:var(--teal);letter-spacing:0}
.lead{font-size:clamp(1.08rem,1.5vw,1.32rem);line-height:1.75;color:var(--ink-2);max-width:58ch;font-weight:350}
.muted{color:var(--ink-soft)}

/* ---------------- layout ---------------- */
.wrap{max-width:var(--maxw);margin:0 auto;padding-inline:var(--gut)}
.pad{padding-block:clamp(90px,13vw,180px)}
.pad-s{padding-block:clamp(60px,8vw,110px)}
section{position:relative}
.bg-paper2{background:var(--paper-2)}
.bg-ink{background:var(--ink);color:var(--paper)}
.bg-ink .display{color:var(--paper)}
.bg-ink .lead{color:#d8d4c8}
.bg-ink .eyebrow{color:var(--teal-bright)}
.bg-ink .muted{color:#b4b0a3}

.hr{height:1px;background:var(--line);border:0;margin:0}

/* ---------------- nav ---------------- */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  display:flex;align-items:center;justify-content:space-between;
  padding:22px var(--gut);transition:padding .4s,background .4s,border-color .4s;
  border-bottom:1px solid transparent;
}
.nav.scrolled{background:rgba(250,248,243,.85);backdrop-filter:blur(16px) saturate(1.2);padding-block:14px;border-bottom-color:var(--line)}
.brand{display:flex;align-items:center;gap:12px}
.brand .mark{width:30px;height:30px;flex:0 0 30px}
.brand .mark svg{width:100%;height:100%}
.brand .bt{font-family:var(--serif);font-weight:900;font-size:1.18rem;letter-spacing:.04em;line-height:1}
.brand .bs{display:block;font-size:.52rem;letter-spacing:.36em;color:var(--ink-faint);font-weight:600;margin-top:3px}
.nav-links{display:flex;gap:4px;align-items:center}
.nav-links a{font-size:.9rem;font-weight:500;padding:9px 16px;color:var(--ink-soft);transition:color .25s;position:relative}
.nav-links a::after{content:"";position:absolute;left:16px;right:16px;bottom:4px;height:1px;background:var(--teal);transform:scaleX(0);transform-origin:left;transition:transform .3s}
.nav-links a:hover{color:var(--ink)}
.nav-links a:hover::after,.nav-links a.active::after{transform:scaleX(1)}
.nav-links a.active{color:var(--ink)}
.nav-cta{margin-left:14px;border:1px solid var(--ink);color:var(--ink)!important;padding:9px 20px!important;border-radius:100px;font-weight:600;transition:background .25s,color .25s}
.nav-cta::after{display:none!important}
.nav-cta:hover{background:var(--ink);color:var(--paper)!important}
.burger{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.burger span{width:24px;height:1.5px;background:var(--ink);transition:.3s}
.mobile-menu{position:fixed;inset:0;z-index:99;background:var(--paper);display:flex;flex-direction:column;justify-content:center;gap:6px;padding:var(--gut);transform:translateX(100%);transition:transform .5s cubic-bezier(.76,0,.24,1)}
.mobile-menu.open{transform:translateX(0)}
.mobile-menu a{font-family:var(--serif);font-size:2.2rem;font-weight:900;padding:12px 0;border-bottom:1px solid var(--line);color:var(--ink)}
.mobile-menu a.active{color:var(--teal)}

/* ---------------- buttons ---------------- */
.btn{display:inline-flex;align-items:center;gap:12px;font-weight:600;font-size:.96rem;padding:15px 30px;border-radius:100px;cursor:pointer;border:1px solid transparent;transition:transform .25s,background .25s,color .25s,border-color .25s;font-family:var(--sans)}
.btn .arr{transition:transform .25s}
.btn:hover .arr{transform:translateX(5px)}
.btn-ink{background:var(--ink);color:var(--paper)}
.btn-ink:hover{transform:translateY(-2px);background:var(--teal)}
.btn-line{border-color:var(--line);color:var(--ink)}
.btn-line:hover{border-color:var(--ink);transform:translateY(-2px)}
.bg-ink .btn-ink{background:var(--paper);color:var(--ink)}
.bg-ink .btn-ink:hover{background:var(--teal);color:var(--paper)}
.bg-ink .btn-line{border-color:rgba(250,248,243,.3);color:var(--paper)}
.bg-ink .btn-line:hover{border-color:var(--paper)}

/* ============================================================
   HERO
   ============================================================ */
.hero{position:relative;padding-top:clamp(150px,20vw,230px);padding-bottom:clamp(60px,9vw,120px);overflow:hidden}
.hero .wrap{position:relative;z-index:2}
.hero-top{display:flex;justify-content:space-between;align-items:flex-end;gap:30px;flex-wrap:wrap;margin-bottom:clamp(30px,5vw,56px)}
.hero h1{max-width:20ch;font-weight:700;line-height:1.4}
.hero h1 em{font-style:italic;color:var(--teal);font-weight:700}
.hero-meta{text-align:right;max-width:32ch}
.hero-meta p{font-size:.96rem;color:var(--ink-soft);line-height:1.7}
.hero-figure{position:relative;margin-top:clamp(40px,6vw,70px);border-radius:6px;overflow:hidden;aspect-ratio:16/8.2}
.hero-figure img{width:100%;height:100%;object-fit:cover;transform:scale(1.02)}
.hero-figure .tagline{position:absolute;left:0;bottom:0;background:var(--paper);padding:22px 34px 18px 0;border-top-right-radius:6px}
.hero-figure .tagline .display{font-size:clamp(1.2rem,2vw,1.7rem)}
.hero-stats{display:flex;gap:clamp(28px,5vw,70px);margin-top:clamp(40px,5vw,60px);flex-wrap:wrap}
.hero-stat .n{font-family:var(--serif);font-size:clamp(2.2rem,4vw,3.3rem);font-weight:900;line-height:1;letter-spacing:-.02em}
.hero-stat .n .u{font-size:.5em;color:var(--teal)}
.hero-stat .l{font-size:.86rem;color:var(--ink-soft);margin-top:8px}

/* gaze-trail signature */
.gaze{position:absolute;z-index:1;pointer-events:none;opacity:.5}

/* ============================================================
   section header
   ============================================================ */
.shead{max-width:780px;margin-bottom:clamp(46px,6vw,80px)}
.shead.center{margin-inline:auto;text-align:center}
.shead.center .eyebrow{justify-content:center}
.shead h2{margin:.5em 0 .5em}
.shead .lead{margin-top:.4em}

/* ---------- editorial index list (positioning) ---------- */
.index-list{border-top:1px solid var(--line)}
.idx-row{display:grid;grid-template-columns:90px 1fr 1.1fr;gap:clamp(20px,4vw,60px);
  padding:clamp(30px,4vw,48px) 0;border-bottom:1px solid var(--line);align-items:baseline;transition:padding-left .35s}
.idx-row:hover{padding-left:14px}
.idx-no{font-family:var(--serif);font-style:italic;font-size:2rem;font-weight:700;color:var(--teal)}
.idx-row h3{font-family:var(--serif);font-size:clamp(1.4rem,2.3vw,2rem);font-weight:900;line-height:1.2}
.idx-row p{color:var(--ink-soft);font-size:1rem;line-height:1.75}
.idx-row .tag{display:inline-block;margin-top:14px;font-size:.74rem;letter-spacing:.18em;text-transform:uppercase;color:var(--teal);font-weight:600}

/* ---------- feature split ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:clamp(36px,6vw,90px);align-items:center}
.split.rev .s-media{order:2}
.s-media{position:relative;border-radius:6px;overflow:hidden;aspect-ratio:4/4.7}
.s-media img{width:100%;height:100%;object-fit:cover}
.s-media .cap{position:absolute;left:18px;bottom:18px;background:var(--paper);font-size:.7rem;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-soft);padding:8px 14px;border-radius:3px;font-weight:600}
.s-body .eyebrow{margin-bottom:1.4em}
.s-body h2{margin-bottom:.55em}

.clist{list-style:none;margin-top:30px;display:grid;gap:0;border-top:1px solid var(--line)}
.clist li{display:flex;gap:18px;padding:18px 0;border-bottom:1px solid var(--line);align-items:baseline}
.clist .ci{font-family:var(--serif);font-style:italic;color:var(--teal);font-weight:700;flex:0 0 auto;font-size:1.05rem}
.clist .ct{font-size:1rem}
.clist .ct strong{font-weight:700}
.bg-ink .clist,.bg-ink .clist li{border-color:rgba(250,248,243,.16)}

/* ---------- pillar / capability cards ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.gcell{background:var(--paper);padding:clamp(30px,3.5vw,48px);transition:background .3s}
.gcell:hover{background:var(--white)}
.bg-paper2 .gcell{background:var(--paper-2)}
.bg-paper2 .gcell:hover{background:var(--white)}
.gcell .gno{font-family:var(--serif);font-style:italic;font-size:1.3rem;color:var(--teal);font-weight:700}
.gcell h3{font-family:var(--serif);font-size:1.35rem;font-weight:900;margin:18px 0 12px;line-height:1.25}
.gcell p{color:var(--ink-soft);font-size:.96rem}
.gcell .ic{width:40px;height:40px;margin-bottom:20px}
.gcell .ic svg{width:100%;height:100%;stroke:var(--ink);fill:none;stroke-width:1.4}
.gcell:hover .ic svg{stroke:var(--teal)}

/* ---------- big numerals (stats) ---------- */
.bignum{display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(20px,3vw,40px)}
.bignum .bn{border-top:2px solid var(--ink)}
.bg-ink .bignum .bn{border-color:var(--paper)}
.bn .v{font-family:var(--serif);font-size:clamp(2.6rem,5.5vw,4.6rem);font-weight:900;line-height:1;letter-spacing:-.03em;padding-top:18px}
.bn .v .u{font-size:.4em;color:var(--teal);margin-left:.1em}
.bn .k{font-weight:600;margin-top:14px;font-size:1rem}
.bn .d{color:var(--ink-soft);font-size:.85rem;margin-top:5px;line-height:1.5}
.bg-ink .bn .d{color:#b4b0a3}

/* ---------- chain (value chain) ---------- */
.chain{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.chain-col{background:var(--paper);padding:clamp(28px,3vw,44px)}
.bg-paper2 .chain-col{background:var(--paper-2)}
.chain-col . st{font-family:var(--serif);font-size:1.6rem;font-weight:900}
.chain-col .ss{font-size:.8rem;letter-spacing:.14em;text-transform:uppercase;color:var(--teal);font-weight:600;margin:6px 0 24px}
.chain-col ul{list-style:none;display:grid;gap:0}
.chain-col li{padding:12px 0;border-top:1px solid var(--line-soft);font-size:.98rem;display:flex;justify-content:space-between;align-items:center}
.chain-col li::after{content:"";width:5px;height:5px;border-radius:50%;background:var(--teal);opacity:.5}

/* ---------- timeline ---------- */
.tl{border-top:1px solid var(--line)}
.tl-row{display:grid;grid-template-columns:160px 1fr;gap:clamp(20px,4vw,60px);padding:clamp(28px,4vw,46px) 0;border-bottom:1px solid var(--line);transition:background .3s}
.tl-ph{font-family:var(--serif);font-style:italic;font-size:1.05rem;color:var(--teal);font-weight:700}
.tl-ph .big{display:block;font-style:normal;font-size:2.6rem;color:var(--ink);font-weight:900;margin-bottom:6px;line-height:1}
.bg-ink .tl-ph .big{color:var(--paper)}
.tl-bd h4{font-size:1.2rem;font-weight:700;margin-bottom:8px}
.tl-bd p{color:var(--ink-soft);font-size:1rem;max-width:62ch}
.bg-ink .tl,.bg-ink .tl-row{border-color:rgba(250,248,243,.16)}
.bg-ink .tl-bd p{color:#b4b0a3}

/* ---------- markets ---------- */
.markets{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.mk{background:var(--paper);padding:clamp(28px,3vw,44px);display:grid;grid-template-columns:120px 1fr;gap:24px;align-items:start}
.bg-paper2 .mk{background:var(--paper-2)}
.mk .r{font-family:var(--serif);font-size:1.7rem;font-weight:900}
.mk p{color:var(--ink-soft);font-size:.96rem}

/* ---------- loop steps ---------- */
.loop{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(20px,3vw,40px)}
.lp{border-top:2px solid var(--teal);padding-top:24px}
.lp .lk{font-family:var(--serif);font-style:italic;color:var(--teal);font-weight:700;font-size:1.1rem}
.lp h3{font-family:var(--serif);font-size:1.3rem;font-weight:900;margin:12px 0 12px}
.lp p{color:var(--ink-soft);font-size:.96rem}

/* ---------- data layers ---------- */
.layers{display:grid;gap:1px;background:var(--line);border:1px solid var(--line)}
.ly{background:var(--paper);display:grid;grid-template-columns:80px 1fr;gap:20px;padding:22px clamp(20px,2.5vw,34px);align-items:center;transition:background .3s}
.bg-ink .ly{background:var(--ink)}
.bg-ink .layers{background:rgba(250,248,243,.16)}
.ly:hover{background:var(--teal-wash)}
.bg-ink .ly:hover{background:#1d1c14}
.ly .lyn{font-family:var(--serif);font-style:italic;font-size:1.5rem;color:var(--teal);font-weight:700}
.ly h4{font-size:1.02rem;font-weight:700}
.ly p{font-size:.86rem;color:var(--ink-soft)}
.bg-ink .ly p{color:#b4b0a3}

/* ---------- about info ---------- */
.info{border-top:1px solid var(--line)}
.inf-row{display:grid;grid-template-columns:200px 1fr;gap:30px;padding:22px 0;border-bottom:1px solid var(--line)}
.inf-row dt{font-size:.78rem;letter-spacing:.16em;text-transform:uppercase;color:var(--teal);font-weight:600;padding-top:3px}
.inf-row dd{font-size:1.02rem}

/* ---------- leader ---------- */
.leader{display:grid;grid-template-columns:.8fr 1.2fr;gap:clamp(36px,5vw,72px);align-items:start}
.lcard{border:1px solid var(--line);border-radius:6px;padding:clamp(32px,4vw,48px);text-align:center;background:var(--paper-2)}
.lcard .av{width:110px;height:110px;border-radius:50%;margin:0 auto 24px;background:var(--ink);color:var(--paper);display:grid;place-items:center;font-family:var(--serif);font-size:2.6rem;font-weight:900}
.lcard h3{font-family:var(--serif);font-size:1.7rem;font-weight:900}
.lcard .role{color:var(--teal);font-size:.9rem;font-weight:600;margin:8px 0 3px}
.lcard .en{color:var(--ink-faint);font-size:.84rem}
.lcard .facts{margin-top:26px;display:grid;gap:14px;text-align:left}
.lcard .ft{display:flex;gap:16px;align-items:baseline;border-top:1px solid var(--line);padding-top:14px}
.lcard .ft .fn{font-family:var(--serif);font-style:italic;color:var(--teal);font-weight:700;font-size:1.4rem;flex:0 0 auto}
.lcard .ft .fl{font-size:.92rem;color:var(--ink-soft)}

/* ---------- chips ---------- */
.chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:8px}
.chip{font-size:.84rem;border:1px solid var(--line);border-radius:100px;padding:8px 16px;color:var(--ink-2);background:var(--paper)}
.bg-ink .chip{border-color:rgba(250,248,243,.22);color:#d8d4c8;background:transparent}

/* ---------- pull CTA ---------- */
.pull{text-align:center;max-width:24ch;margin:0 auto}
.pull h2{margin-bottom:.5em}
.pull .lead{margin:0 auto 2em}

/* ---------- contact ---------- */
.cgrid{display:grid;grid-template-columns:1.1fr .9fr;gap:clamp(40px,6vw,80px)}
.field{margin-bottom:24px}
.field label{display:block;font-size:.8rem;letter-spacing:.04em;color:var(--ink-soft);margin-bottom:9px;font-weight:600}
.field input,.field textarea,.field select{width:100%;background:transparent;border:0;border-bottom:1px solid var(--line);padding:12px 2px;color:var(--ink);font-family:inherit;font-size:1rem;transition:border-color .25s}
.field input::placeholder,.field textarea::placeholder{color:var(--ink-faint)}
.field input:focus,.field textarea:focus,.field select:focus{outline:none;border-bottom-color:var(--teal)}
.field textarea{resize:vertical;min-height:120px}
.field select{cursor:pointer}
.cinfo{display:grid;gap:0;border-top:1px solid var(--line);align-content:start}
.ci{padding:24px 0;border-bottom:1px solid var(--line)}
.ci h4{font-size:.78rem;letter-spacing:.16em;text-transform:uppercase;color:var(--teal);font-weight:600;margin-bottom:8px}
.ci p{font-size:1rem;color:var(--ink-2);line-height:1.7}
.fnote{font-size:.82rem;color:var(--ink-faint);margin-top:8px}
.okmsg{display:none;margin-top:18px;padding:16px 18px;border-left:2px solid var(--teal);background:var(--teal-wash);color:var(--teal);font-size:.95rem}

/* ---------- footer ---------- */
.foot{background:var(--ink);color:var(--paper);padding-block:clamp(60px,8vw,100px) 32px}
.foot .display{color:var(--paper)}
.foot-top{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;padding-bottom:50px;border-bottom:1px solid rgba(250,248,243,.16)}
.foot .mission{color:#b4b0a3;font-size:.96rem;max-width:32ch;margin-top:20px;line-height:1.8}
.foot h5{font-size:.74rem;letter-spacing:.18em;text-transform:uppercase;color:var(--teal-bright);margin-bottom:18px;font-weight:600}
.foot a,.foot .fp{display:block;color:#cfcbbe;font-size:.94rem;padding:6px 0;transition:color .2s}
.foot a:hover{color:var(--paper)}
.foot-bottom{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;padding-top:26px;font-size:.82rem;color:#8c887c}
.disc{margin-top:16px;font-size:.76rem;color:#6e6a5f;line-height:1.7;max-width:none}
.foot .brand .bt,.foot .brand .bs{color:var(--paper)}
.foot .brand .bs{color:#8c887c}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .9s cubic-bezier(.2,.7,.2,1),transform .9s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}
.d1{transition-delay:.09s}.d2{transition-delay:.18s}.d3{transition-delay:.27s}.d4{transition-delay:.36s}
.clip{clip-path:inset(0 100% 0 0);transition:clip-path 1.1s cubic-bezier(.76,0,.24,1)}
.clip.in{clip-path:inset(0 0 0 0)}

/* ---------- responsive ---------- */
@media(max-width:960px){
  .nav-links{display:none}.burger{display:flex}
  .split,.split.rev .s-media{grid-template-columns:1fr;order:0}
  .s-media{aspect-ratio:16/11}
  .grid-3,.chain,.loop{grid-template-columns:1fr}
  .markets{grid-template-columns:1fr}
  .bignum{grid-template-columns:repeat(2,1fr);gap:30px 24px}
  .idx-row{grid-template-columns:60px 1fr;gap:16px}
  .idx-row p{grid-column:1/-1}
  .leader{grid-template-columns:1fr}
  .cgrid{grid-template-columns:1fr}
  .tl-row{grid-template-columns:1fr;gap:10px}
  .inf-row,.mk{grid-template-columns:1fr;gap:8px}
  .foot-top{grid-template-columns:1fr 1fr}
  .hero-meta{text-align:left}
}
@media(max-width:560px){
  .bignum{grid-template-columns:1fr}
  .foot-top{grid-template-columns:1fr}
  .hero-figure{aspect-ratio:4/3}
}
@media(prefers-reduced-motion:reduce){
  *{animation:none!important}
  .reveal,.clip{opacity:1;transform:none;clip-path:none;transition:none}
  html{scroll-behavior:auto}
}