/* 写迹 XieJi — ink & paper editorial design system */
:root{
  --ink:#16324B;
  --ink-2:#0E2438;
  --ink-3:#24486B;
  --teal:#0E8A7E;
  --teal-dark:#0A6B62;
  --teal-soft:#E4F3EF;
  --mint:#CFEDE4;
  --paper:#FBFAF6;
  --paper-2:#F4F1E8;
  --gold:#C08A3E;
  --gold-soft:#F6EDDC;
  --line:rgba(22,50,75,.13);
  --line-strong:rgba(22,50,75,.24);
  --muted:#5B7186;
  --serif:"Songti SC","STSong","Noto Serif SC","SimSun",serif;
  --sans:"PingFang SC","Microsoft YaHei","Segoe UI",sans-serif;
  --en:Georgia,"Times New Roman",serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--sans);
  background:var(--paper);
  color:var(--ink);
  font-size:17px;
  line-height:1.85;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer;border:none;background:none;color:inherit}
:focus-visible{outline:3px solid var(--teal);outline-offset:3px;border-radius:4px}

.wrap{width:min(1120px,92vw);margin:0 auto}
.wrap-narrow{width:min(820px,92vw);margin:0 auto}

/* ============ NAV ============ */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  padding:16px 0;transition:background .3s ease,box-shadow .3s ease,padding .3s ease;
}
.nav.scrolled{
  background:rgba(251,250,246,.92);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:0 1px 0 var(--line),0 12px 32px rgba(22,50,75,.06);
  padding:10px 0;
}
.nav-inner{display:flex;align-items:center;gap:14px}
.nav-logo{display:flex;align-items:center;gap:11px}
.nav-logo img{height:42px;width:auto;border-radius:10px}
.nav-logo .wm{font-family:var(--serif);font-size:1.5rem;font-weight:700;letter-spacing:.12em}
.nav-links{display:flex;gap:6px;margin-left:auto;flex-wrap:wrap}
.nav-links a{
  padding:8px 15px;border-radius:999px;font-size:.93rem;font-weight:600;color:var(--ink);
  transition:background .2s ease,color .2s ease;
}
.nav-links a:hover{background:var(--teal-soft);color:var(--teal-dark)}
.nav-cta{
  margin-left:8px;background:var(--ink);color:#fff;border-radius:999px;
  padding:10px 22px;font-size:.93rem;font-weight:700;
  transition:transform .2s ease,background .2s ease;
}
.nav-cta:hover{background:var(--teal-dark);transform:translateY(-2px)}

/* ============ HERO ============ */
.hero{
  position:relative;padding:170px 0 90px;
  background:
    radial-gradient(1100px 520px at 82% -10%,rgba(14,138,126,.14),transparent 60%),
    radial-gradient(900px 480px at -8% 108%,rgba(22,50,75,.10),transparent 62%),
    var(--paper);
  overflow:hidden;
}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:56px;align-items:center}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  background:#fff;border:1px solid var(--line);border-radius:999px;
  padding:8px 18px;font-size:.92rem;font-weight:700;color:var(--teal-dark);
  letter-spacing:.14em;
}
.hero-eyebrow .dot{width:8px;height:8px;border-radius:50%;background:var(--teal)}
.hero h1{
  font-family:var(--serif);
  font-size:clamp(2.35rem,4.6vw,3.62rem);
  line-height:1.24;font-weight:700;letter-spacing:.02em;
  margin:26px 0 22px;
}
.hero h1 .l1,.hero h1 .l2{display:block;white-space:nowrap}
.hero h1 .accent{
  color:var(--teal-dark);position:relative;white-space:nowrap;
}
.hero h1 .accent::after{
  content:"";position:absolute;left:0;right:0;bottom:.08em;height:.16em;
  background:var(--mint);z-index:-1;border-radius:3px;
}
.hero-sub{font-size:1.13rem;color:var(--muted);max-width:34em}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:34px}
.btn{
  display:inline-flex;align-items:center;gap:9px;border-radius:999px;
  padding:15px 30px;font-size:1.02rem;font-weight:700;
  transition:transform .22s ease,box-shadow .22s ease,background .22s ease;
}
.btn-primary{background:var(--ink);color:#fff;box-shadow:0 14px 34px rgba(22,50,75,.22)}
.btn-primary:hover{background:var(--teal-dark);transform:translateY(-3px);box-shadow:0 20px 44px rgba(14,138,126,.3)}
.btn-ghost{background:#fff;border:1.5px solid var(--line-strong);color:var(--ink)}
.btn-ghost:hover{border-color:var(--teal);color:var(--teal-dark);transform:translateY(-3px)}
.hero-stats{display:flex;gap:34px;margin-top:44px;flex-wrap:wrap}
.hstat .num{font-family:var(--en);font-size:2.05rem;font-weight:700;color:var(--teal-dark);line-height:1.15}
.hstat .lbl{font-size:.92rem;color:var(--muted)}

/* hero visual: paper + growth line */
.hero-visual{position:relative}
.paper-sheet{
  position:relative;background:#fff;border-radius:18px;
  box-shadow:0 30px 80px rgba(22,50,75,.16),0 4px 14px rgba(22,50,75,.07);
  padding:30px 32px 26px;transform:rotate(-1.6deg);
}
.paper-sheet::before{
  content:"";position:absolute;inset:12px 14px 14px 12px;
  border:1px solid var(--line);border-radius:12px;pointer-events:none;
}
.paper-head{display:flex;justify-content:space-between;align-items:baseline;gap:10px}
.paper-head .t{font-family:var(--serif);font-size:1.18rem;font-weight:700}
.paper-head .d{font-size:.85rem;color:var(--muted);font-family:var(--en)}
.rule-lines{margin:18px 0 8px;display:flex;flex-direction:column;gap:11px}
.rule-lines i{display:block;height:8px;border-radius:99px;background:var(--paper-2)}
.rule-lines i:nth-child(2){width:86%}
.rule-lines i:nth-child(3){width:72%}
.growth-svg{width:100%;height:auto;display:block;margin-top:6px}
.growth-path{
  fill:none;stroke:var(--teal);stroke-width:4;stroke-linecap:round;
  stroke-dasharray:1000;stroke-dashoffset:1000;
  animation:draw 2.4s cubic-bezier(.4,0,.2,1) .5s forwards;
}
.growth-dot{opacity:0;animation:pop .5s ease forwards}
.growth-dot:nth-of-type(1){animation-delay:1.2s}
.growth-dot:nth-of-type(2){animation-delay:1.7s}
.growth-dot:nth-of-type(3){animation-delay:2.15s}
@keyframes draw{to{stroke-dashoffset:0}}
@keyframes pop{from{opacity:0;transform:scale(.4)}to{opacity:1;transform:scale(1)}}
.float-card{
  position:absolute;background:#fff;border-radius:14px;
  box-shadow:0 18px 46px rgba(22,50,75,.14);
  padding:13px 17px;font-size:.9rem;font-weight:700;
  display:flex;align-items:center;gap:9px;white-space:nowrap;
}
.float-card .tag{width:10px;height:10px;border-radius:3px}
.float-1{top:6%;right:-4%;transform:rotate(2deg)}
.float-2{bottom:12%;left:-6%;transform:rotate(-2.4deg)}
.float-3{bottom:-5%;right:8%;transform:rotate(1.2deg)}

/* ============ SECTIONS ============ */
section{position:relative}
.sec{padding:96px 0}
.sec-paper{background:var(--paper)}
.sec-white{background:#fff}
.sec-ink{background:var(--ink);color:#fff}
.sec-ink .sec-label{color:var(--mint)}
.sec-ink .sec-title{color:#fff}
.sec-ink .sec-desc{color:rgba(255,255,255,.72)}
.sec-label{
  font-size:.92rem;font-weight:800;letter-spacing:.32em;color:var(--teal-dark);
  text-transform:uppercase;font-family:var(--en);
}
.sec-title{
  font-family:var(--serif);font-size:clamp(1.95rem,3.4vw,2.75rem);
  line-height:1.32;font-weight:700;margin:14px 0 18px;letter-spacing:.02em;
}
.sec-desc{color:var(--muted);font-size:1.06rem;max-width:42em}
.sec-head{margin-bottom:52px}
.sec-head.center{text-align:center}
.sec-head.center .sec-desc{margin:0 auto}

/* pain cards */
.pain-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
.pain-card{
  background:#fff;border:1px solid var(--line);border-radius:18px;padding:32px 28px;
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.pain-card:hover{transform:translateY(-6px);box-shadow:0 24px 54px rgba(22,50,75,.12);border-color:var(--mint)}
.pain-no{font-family:var(--en);font-size:.95rem;font-weight:700;color:var(--teal-dark);letter-spacing:.18em}
.pain-card h3{font-family:var(--serif);font-size:1.32rem;margin:12px 0 10px;font-weight:700}
.pain-card p{color:var(--muted);font-size:.98rem}

/* pipeline */
.pipe{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:0;counter-reset:step}
.pipe-step{
  position:relative;padding:28px 22px 26px;
  border-top:2px solid var(--line-strong);
}
.pipe-step::before{
  counter-increment:step;content:counter(step,decimal-leading-zero);
  font-family:var(--en);font-size:1.02rem;font-weight:700;letter-spacing:.12em;
  color:var(--teal-dark);background:#fff;
  position:absolute;top:-15px;left:22px;padding:2px 10px;border-radius:99px;
  border:1px solid var(--mint);
}
.pipe-step .ico{font-size:1.7rem;line-height:1}
.pipe-step h3{font-family:var(--serif);font-size:1.18rem;margin:12px 0 8px}
.pipe-step p{font-size:.92rem;color:var(--muted)}
.sec-ink .pipe-step{border-top-color:rgba(255,255,255,.22)}
.sec-ink .pipe-step::before{background:var(--ink);color:var(--mint);border-color:rgba(207,237,228,.4)}
.sec-ink .pipe-step p{color:rgba(255,255,255,.66)}

/* rubric */
.rubric-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:16px}
.rubric-item{
  background:#fff;border:1px solid var(--line);border-radius:16px;padding:26px 20px;
  text-align:center;transition:transform .22s ease,box-shadow .22s ease;
}
.rubric-item:hover{transform:translateY(-5px);box-shadow:0 20px 44px rgba(22,50,75,.1)}
.rubric-ring{
  width:76px;height:76px;margin:0 auto 14px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-family:var(--serif);font-size:1.35rem;font-weight:700;color:var(--teal-dark);
  background:conic-gradient(var(--teal) var(--p,72%),var(--teal-soft) 0);
  position:relative;
}
.rubric-ring::after{
  content:"";position:absolute;inset:8px;border-radius:50%;background:#fff;
}
.rubric-ring span{position:relative;z-index:1}
.rubric-item h3{font-family:var(--serif);font-size:1.14rem;margin-bottom:6px}
.rubric-item p{font-size:.9rem;color:var(--muted)}

/* three drafts */
.drafts{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.1fr);gap:56px;align-items:center}
.draft-stack{position:relative;height:430px}
.draft-paper{
  position:absolute;width:74%;background:#fff;border-radius:14px;
  box-shadow:0 22px 60px rgba(22,50,75,.14);padding:22px 24px;
  transition:transform .35s ease;
}
.draft-paper .tag{
  display:inline-flex;align-items:center;gap:7px;font-size:.92rem;font-weight:800;
  letter-spacing:.12em;padding:5px 12px;border-radius:999px;margin-bottom:12px;
}
.draft-paper h4{font-family:var(--serif);font-size:1.12rem;margin-bottom:8px}
.draft-paper p{font-size:.9rem;color:var(--muted);line-height:1.7}
.draft-paper .lines{margin-top:12px;display:flex;flex-direction:column;gap:8px}
.draft-paper .lines i{height:7px;border-radius:99px;background:var(--paper-2)}
.draft-paper .lines i:nth-child(2){width:80%}
.draft-paper .lines i:nth-child(3){width:62%}
.dp-1{top:0;left:4%;transform:rotate(-3deg);z-index:3}
.dp-2{top:14%;left:16%;transform:rotate(1.6deg);z-index:2}
.dp-3{top:30%;left:28%;transform:rotate(-.6deg);z-index:1}
.draft-stack:hover .dp-1{transform:rotate(-5deg) translateY(-8px)}
.draft-stack:hover .dp-2{transform:rotate(2.6deg) translateY(4px)}
.draft-stack:hover .dp-3{transform:rotate(-1deg) translateY(12px)}
.draft-points{display:flex;flex-direction:column;gap:22px}
.draft-point{display:flex;gap:16px;align-items:flex-start}
.draft-point .mark{
  flex-shrink:0;width:44px;height:44px;border-radius:12px;
  background:var(--teal-soft);color:var(--teal-dark);
  display:flex;align-items:center;justify-content:center;font-weight:800;font-family:var(--en);
}
.draft-point h3{font-family:var(--serif);font-size:1.22rem;margin-bottom:5px}
.draft-point p{color:var(--muted);font-size:.98rem}

/* growth chart (signature) */
.growth-panel{
  background:#fff;border-radius:22px;border:1px solid var(--line);
  box-shadow:0 30px 80px rgba(22,50,75,.10);
  padding:38px 40px;margin-top:12px;
}
.growth-toolbar{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin-bottom:22px}
.seg{
  display:inline-flex;background:var(--paper-2);border-radius:999px;padding:5px;gap:4px;
}
.seg button{
  padding:9px 20px;border-radius:999px;font-size:.93rem;font-weight:700;color:var(--muted);
  transition:background .2s ease,color .2s ease;
}
.seg button[aria-pressed="true"]{background:#fff;color:var(--ink);box-shadow:0 4px 14px rgba(22,50,75,.1)}
.legend{display:flex;gap:18px;flex-wrap:wrap;margin-left:auto;font-size:.9rem;color:var(--muted)}
.legend span{display:inline-flex;align-items:center;gap:7px}
.legend i{width:12px;height:12px;border-radius:4px;display:inline-block}
.chart-box{position:relative}
.chart-svg{width:100%;height:auto;display:block;overflow:visible}
.evidence{
  margin-top:24px;background:var(--paper);border:1px solid var(--line);
  border-radius:16px;padding:22px 24px;
  display:grid;grid-template-columns:auto minmax(0,1fr);gap:18px;align-items:start;
}
.evidence .avatar{
  width:52px;height:52px;border-radius:14px;background:var(--ink);color:var(--mint);
  display:flex;align-items:center;justify-content:center;font-family:var(--serif);
  font-size:1.25rem;font-weight:700;
}
.evidence .st{display:flex;gap:8px;flex-wrap:wrap;margin:8px 0}
.evidence .quote{
  border-left:3px solid var(--teal);padding:6px 14px;margin-top:8px;
  color:var(--ink);font-size:.97rem;background:#fff;border-radius:0 10px 10px 0;
}
.evidence .src{margin-top:10px;font-size:.92rem;color:var(--muted)}
.evidence .src b{color:var(--teal-dark)}

/* six ports */
.port-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.port-card{
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);
  border-radius:18px;padding:28px 26px;
  transition:transform .25s ease,background .25s ease,border-color .25s ease;
}
.port-card:hover{transform:translateY(-6px);background:rgba(255,255,255,.11);border-color:rgba(207,237,228,.5)}
.port-card .ico{
  width:52px;height:52px;border-radius:15px;background:rgba(207,237,228,.16);
  display:flex;align-items:center;justify-content:center;font-size:1.5rem;margin-bottom:16px;
}
.port-card h3{font-family:var(--serif);font-size:1.25rem;margin-bottom:8px;color:#fff}
.port-card p{font-size:.95rem;color:rgba(255,255,255,.68)}
.port-card .perm{
  margin-top:14px;font-size:.92rem;font-weight:700;letter-spacing:.1em;
  color:var(--mint);font-family:var(--en);
}

/* outcomes */
.outcome-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.outcome-card{
  background:#fff;border:1px solid var(--line);border-radius:18px;padding:30px 28px;
}
.outcome-card .n{font-family:var(--en);font-size:2.2rem;font-weight:700;color:var(--teal-dark);line-height:1}
.outcome-card h3{font-family:var(--serif);font-size:1.22rem;margin:12px 0 8px}
.outcome-card p{color:var(--muted);font-size:.97rem}

/* cator / footer */
.footer{background:var(--ink-2);color:rgba(255,255,255,.72);padding:64px 0 34px;font-size:.94rem}
.footer-grid{display:flex;justify-content:space-between;gap:30px;flex-wrap:wrap;align-items:flex-start}
.footer .brand{display:flex;align-items:center;gap:12px}
.footer .brand img{height:44px;width:auto;border-radius:10px}
.footer .brand .wm{font-family:var(--serif);font-size:1.55rem;color:#fff;letter-spacing:.12em;font-weight:700}
.footer h4{color:#fff;font-size:.98rem;margin-bottom:10px;font-family:var(--serif)}
.footer a{color:rgba(255,255,255,.72)}
.footer a:hover{color:var(--mint)}
.footer-note{
  margin-top:44px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:.92rem;color:rgba(255,255,255,.5);
}
.demo-badge{
  display:inline-flex;align-items:center;gap:8px;background:rgba(207,237,228,.14);
  color:var(--mint);border:1px solid rgba(207,237,228,.32);border-radius:999px;
  padding:8px 16px;font-size:.92rem;font-weight:700;letter-spacing:.08em;
}
.demo-badge.on-paper{background:var(--teal-soft);color:var(--teal-dark);border-color:var(--mint)}

/* reveal */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .8s ease,transform .8s cubic-bezier(.2,.65,.25,1)}
.reveal.in{opacity:1;transform:none}

/* responsive */
@media (max-width:980px){
  .hero-grid{grid-template-columns:1fr;gap:48px}
  .hero{padding:140px 0 70px}
  .pain-grid,.port-grid,.outcome-grid{grid-template-columns:1fr}
  .pipe{grid-template-columns:repeat(2,minmax(0,1fr));row-gap:34px}
  .rubric-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .drafts{grid-template-columns:1fr}
  .draft-stack{height:380px;max-width:520px}
  .nav-links{display:none}
}
@media (max-width:560px){
  body{font-size:16px}
  .sec{padding:64px 0}
  .pipe{grid-template-columns:1fr}
  .rubric-grid{grid-template-columns:1fr}
  .growth-panel{padding:22px 18px}
  .hero-stats{gap:20px}
  .float-card{display:none}
  .evidence{grid-template-columns:1fr}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition:none!important;animation:none!important}
  .growth-path{stroke-dashoffset:0}
  .growth-dot{opacity:1}
  .reveal{opacity:1;transform:none}
}

/* marquee */
.marquee{
  overflow:hidden;background:var(--ink);color:var(--mint);
  padding:15px 0;white-space:nowrap;
}
.marquee-track{
  display:inline-flex;gap:48px;
  animation:marquee 26s linear infinite;
  font-family:var(--serif);font-size:1.08rem;letter-spacing:.14em;
}
.marquee-track span{padding-right:48px}
@keyframes marquee{from{transform:translateX(0)}to{transform:translateX(-50%)}}

/* port cards are links now */
.port-card{display:block}
.port-card .go{
  display:inline-flex;align-items:center;gap:8px;margin-top:16px;
  color:var(--mint);font-size:.92rem;font-weight:700;letter-spacing:.08em;
}
.port-card .go::after{content:"→";transition:transform .2s ease}
.port-card:hover .go::after{transform:translateX(5px)}

/* chart node hover */
.chart-node circle{transition:transform .2s ease}
.chart-node:hover circle:nth-of-type(2),
.chart-node:focus-visible circle:nth-of-type(2){transform-box:fill-box;transform-origin:center;transform:scale(1.18)}

/* hero paper parallax tilt */
.paper-sheet{transition:transform .35s ease}
.growth-path{stroke-dasharray:1000}

@media (prefers-reduced-motion:reduce){
  .marquee-track{animation:none}
  .paper-sheet{transition:none}
}