:root { --paper:#f2f0ea; --ink:#171817; --blue:#29465f; --brand-teal:#527080; --brand-pink:#c24e3b; --display:'Source Han Sans CN','Hiragino Sans GB','PingFang SC','Microsoft YaHei',sans-serif; --serif:'STSong','Songti SC','Apple LiSung',serif; --script:'Kaiti SC','STKaiti','Xingkai SC',var(--serif); --sans:'Source Han Sans CN','Hiragino Sans GB','PingFang SC','Microsoft YaHei',sans-serif; --line:rgba(23,24,23,.2); --muted:#657078; }

* { box-sizing:border-box; }
html { scroll-behavior:smooth; }
section { scroll-margin-top:84px; }
body { margin:0; overflow-x:hidden; background:var(--paper); color:var(--ink); font-family:var(--sans); }
a { color:inherit; }
.skip { position:fixed; z-index:20; top:-50px; left:18px; padding:9px 12px; color:var(--paper); background:var(--ink); }
.skip:focus { top:18px; }

.topbar { min-height:82px; display:grid; grid-template-columns:1fr auto 1fr; align-items:center; padding:14px clamp(22px,4vw,64px); border-bottom:1px solid var(--line); background:rgba(250,249,244,.94); backdrop-filter:blur(8px); position:sticky; top:0; z-index:100; }
.brand { display:flex; align-items:center; width:max-content; gap:12px; text-decoration:none; font:300 19px/1.05 'Hiragino Sans GB',var(--display); letter-spacing:.018em; transition:transform .25s ease; }
.brand span { font-weight:300; }
.brand:hover { transform:translateX(2px); }
.brand img { width:42px; height:42px; mix-blend-mode:multiply; transition:transform .45s cubic-bezier(.2,.8,.2,1); }
.brand:hover img { transform:rotate(12deg); }
.topbar nav { display:flex; gap:clamp(18px,3vw,48px); font-size:14px; font-weight:400; }
.topbar nav a { text-decoration:none; padding:7px 0; border-bottom:2px solid transparent; transition:border-color .2s; }
.topbar nav a:hover { border-color:var(--brand-pink); }
.domain { justify-self:end; color:var(--muted); font:500 13px/1.2 var(--sans); letter-spacing:.04em; text-decoration:none; padding:4px 0; transition:color .25s; }
.domain:hover { color:var(--brand-pink); }

.opening { min-height:calc(100svh - 82px); position:relative; display:flex; flex-direction:column; padding:clamp(28px,4vw,56px) clamp(24px,7vw,120px) clamp(34px,5vw,70px); background:var(--paper); isolation:isolate; overflow:hidden; }
.opening::before { content:''; position:absolute; z-index:-1; inset:0; background:none; }
.opening-topline { display:flex; align-items:center; padding-bottom:18px; border-bottom:1px solid var(--line); color:var(--muted); font-size:12px; letter-spacing:.08em; animation:rule-in .8s .05s both; }
.opening-layout { flex:1; display:grid; grid-template-columns:minmax(0,1.1fr) minmax(320px,.9fr); align-items:center; gap:clamp(36px,6vw,100px); padding:clamp(42px,7vh,88px) 0 clamp(28px,4vh,54px); }
.opening-copy-block { position:relative; z-index:3; }
.opening h1 { max-width:680px; margin:0; color:var(--ink); font:600 clamp(44px,5.2vw,78px)/1.16 var(--display); letter-spacing:-.035em; animation:rise-in .9s .12s both; }
.opening h1 em { color:var(--blue); font-style:normal; }
.opening-copy { max-width:530px; margin:clamp(30px,4vw,54px) 0 0 2%; font-size:clamp(15px,1.2vw,17px); line-height:1.85; color:var(--muted); animation:rise-in .9s .24s both; }
.opening-visual { display:flex; flex-direction:column; gap:clamp(30px,4vw,52px); min-width:0; }
.hero-mark-wrap { position:absolute; z-index:0; right:-4%; bottom:-16%; width:min(34vw,480px); aspect-ratio:1; display:grid; place-items:center; opacity:.055; pointer-events:none; animation:mark-drift 20s ease-in-out infinite; }
.hero-mark { display:block; width:100%; height:auto; mix-blend-mode:multiply; filter:grayscale(1) contrast(1.08); }

.hero-panel { position:relative; z-index:2; width:100%; padding-top:20px; border-top:1px solid var(--line); animation:reveal-right .9s .32s both; }
.hero-panel > p { margin:0 0 16px; color:var(--brand-teal); font-size:12px; font-weight:600; letter-spacing:.08em; }
.hero-panel ol { margin:0; padding:0; list-style:none; display:grid; grid-template-columns:repeat(2,1fr); gap:0 28px; }
.hero-panel li { display:flex; justify-content:space-between; align-items:center; padding:13px 0; border-bottom:1px solid rgba(18,21,18,.16); font:500 clamp(17px,1.55vw,22px)/1.2 var(--serif); letter-spacing:-.015em; transition:color .2s, padding-left .25s; }
.hero-panel li:hover { padding-left:7px; }
.hero-panel li:hover { color:var(--brand-pink); }
.hero-panel li::after { content:''; }
.hero-panel > span { display:block; margin-top:16px; color:var(--blue); font-size:13px; font-weight:600; }

.read-next { display:inline-flex; align-items:center; gap:18px; width:max-content; margin:clamp(34px,5vw,66px) 0 0 2%; padding:14px 0; color:var(--ink); text-decoration:none; border-bottom:2px solid var(--brand-teal); transition:color .25s, gap .25s; animation:line-pulse 4s 1.3s ease-in-out infinite; }
.read-next b { font-size:15px; font-weight:600; letter-spacing:.02em; }
.read-next span { display:inline-flex; align-items:center; justify-content:center; color:var(--brand-pink); font-size:20px; transition:transform .3s cubic-bezier(.34,1.56,.64,1); }
.read-next:hover { border-bottom-color:var(--brand-teal); }
.read-next:hover span { transform:translateY(6px); }

.declaration { position:relative; min-height:580px; padding:clamp(88px,11vw,155px) clamp(24px,9vw,150px) clamp(95px,12vw,175px); color:var(--ink); background:#d9e2e5; overflow:hidden; }
.declaration > p { position:relative; z-index:1; margin:0 0 32px; font-size:clamp(16px,1.7vw,19px); line-height:1.6; color:var(--muted); max-width:620px; }
.declaration h2 { position:relative; z-index:1; max-width:820px; margin:0; font:600 clamp(42px,5.4vw,78px)/1.16 var(--display); letter-spacing:-.035em; }
.declaration h2 i { color:var(--brand-pink); font-style:normal; border-bottom:3px solid var(--brand-pink); }
.declaration-note { position:relative; z-index:1; display:flex; align-items:start; gap:clamp(28px,4vw,52px); margin:clamp(65px,9vw,125px) 0 0 clamp(8%,12vw,18%); padding-left:36px; border-left:4px solid var(--brand-pink); }
.declaration-note span { color:var(--brand-teal); font:600 clamp(36px,4vw,54px)/1 var(--script); letter-spacing:.02em; flex-shrink:0; }
.declaration-note p { margin:12px 0 0; font-size:clamp(16px,1.7vw,19px); line-height:1.75; color:var(--muted); max-width:520px; }

.work { padding:clamp(105px,13vw,195px) clamp(24px,9vw,150px) clamp(92px,11vw,165px); background:#f8f6f0; }
.work-head { display:flex; flex-direction:column; gap:18px; margin-bottom:clamp(68px,10vw,135px); max-width:880px; }
.work-head p { margin:0; color:var(--brand-pink); font-weight:600; font-size:clamp(12px,1.15vw,14px); letter-spacing:.12em; }
.work-head h2 { margin:0; font:600 clamp(40px,4.8vw,72px)/1.2 var(--display); letter-spacing:-.035em; }
.work-list { display:flex; flex-direction:column; border-top:1px solid rgba(18,21,18,.35); }
.work-list details { padding:clamp(24px,3vw,38px) 0; border-bottom:1px solid rgba(18,21,18,.25); transition:padding .25s, border-color .25s; }
.work-list details:hover { border-color:var(--brand-teal); padding-left:10px; }
.work-list summary { display:flex; align-items:center; gap:clamp(18px,2.5vw,32px); cursor:pointer; list-style:none; }
.work-list summary::-webkit-details-marker { display:none; }
.work-list summary span { color:var(--brand-pink); font:700 clamp(14px,1.5vw,17px) var(--sans); letter-spacing:.08em; flex-shrink:0; }
.work-list summary strong { flex:1; font:500 clamp(24px,2.7vw,40px)/1.2 var(--serif); letter-spacing:-.02em; }
.work-list summary i { font:300 32px/1 var(--sans); font-style:normal; color:var(--brand-teal); transition:all .25s; flex-shrink:0; }
.work-list details[open] summary i { rotate:45deg; color:var(--brand-pink); }
.work-list details > div { padding-top:clamp(24px,3vw,36px); display:flex; flex-direction:column; gap:clamp(20px,2.5vw,28px); margin-left:clamp(60px,8vw,100px); max-width:580px; }
.work-list details > div p { margin:0; font-size:clamp(15px,1.65vw,19px); line-height:1.75; color:var(--muted); }
.work-list details > div b { color:var(--brand-teal); font:600 clamp(19px,1.8vw,26px)/1.4 var(--serif); letter-spacing:-.03em; }

.approach { position:relative; min-height:680px; display:flex; flex-direction:column; justify-content:center; gap:clamp(58px,8vw,95px); padding:clamp(95px,12vw,175px) clamp(24px,9vw,150px); background:#e8dfd6; overflow:hidden; }
.approach-copy { position:relative; z-index:2; max-width:920px; }
.approach-copy > p:first-child,.contact > p { margin:0 0 22px; font-weight:600; font-size:clamp(12px,1.15vw,14px); letter-spacing:.12em; color:var(--brand-pink); }
.approach h2 { margin:0; font:600 clamp(42px,5.4vw,78px)/1.16 var(--display); letter-spacing:-.035em; }
.approach-text { max-width:580px; margin:clamp(28px,3.5vw,42px) 0 0 0; font-size:clamp(15px,1.3vw,18px); line-height:1.85; color:var(--muted); }
.steps { position:relative; z-index:2; margin:0; padding:0; list-style:none; display:grid; grid-template-columns:repeat(auto-fit, minmax(240px, 1fr)); gap:clamp(24px,3vw,38px); }
.steps li { display:flex; flex-direction:column; gap:14px; padding:clamp(26px,3vw,38px) 0 0; border-top:2px solid var(--brand-pink); transition:padding .25s, border-color .25s; }
.steps li:hover { border-color:var(--brand-teal); padding-left:8px; }
.steps b { color:var(--brand-teal); font:700 clamp(12px,1.3vw,14px) var(--sans); letter-spacing:.12em; }
.steps span { font:600 clamp(23px,2vw,32px) var(--serif); letter-spacing:-.02em; color:var(--ink); }
.steps p { margin:0; font-size:clamp(14px,1.55vw,17px); line-height:1.65; color:var(--muted); }

.contact { min-height:520px; position:relative; padding:clamp(98px,12vw,175px) clamp(24px,9vw,150px) clamp(88px,11vw,155px); background:var(--paper); }
.contact h2 { position:relative; max-width:880px; margin:0 0 clamp(44px,6vw,68px); font:600 clamp(42px,5.2vw,78px)/1.18 var(--display); letter-spacing:-.035em; }
.contact a { display:inline-flex; align-items:center; gap:clamp(16px,2vw,24px); padding:0 0 14px; color:var(--blue); font:500 clamp(21px,2.6vw,36px) var(--sans); letter-spacing:0; text-decoration:none; border-bottom:2px solid var(--brand-teal); transition:all .3s ease; }
.contact a span { color:var(--brand-pink); font-size:1.15em; transition:transform .3s cubic-bezier(.34,1.56,.64,1); }
.contact a:hover { color:var(--brand-pink); border-color:var(--brand-pink); transform:translateX(6px); }
.contact a:hover span { transform:translate(5px,-5px); }
.contact small { display:block; margin-top:28px; color:var(--muted); font-size:13px; line-height:1.8; }

footer { min-height:91px; display:grid; grid-template-columns:36px 1fr auto auto auto; align-items:center; gap:18px; padding:14px clamp(22px,4vw,64px); background:#1c2528; border-top:3px solid var(--brand-pink); color:var(--paper); font-size:13px; }
footer img { width:36px; height:36px; filter:invert(1); }
footer p { margin:0; }
footer a { color:#e7866f; text-decoration:none; transition:color .2s; }
footer a:hover { color:#f0b09f; }
footer .icp { color:#b8c9ce; }
footer .icp:hover { color:#e7866f; }

@keyframes rise-in { from { opacity:0; transform:translateY(18px); } to { opacity:1; transform:none; } }
@keyframes reveal-right { from { opacity:0; transform:translateX(24px); } to { opacity:1; transform:none; } }
@keyframes rule-in { from { opacity:0; transform:scaleX(0); transform-origin:left; } to { opacity:1; transform:scaleX(1); transform-origin:left; } }
@keyframes mark-drift { 0%,100% { transform:translate3d(0,0,0) rotate(-2deg) scale(.98); } 50% { transform:translate3d(-10px,-8px,0) rotate(2deg) scale(1.02); } }
@keyframes line-pulse { 0%,70%,100% { border-bottom-color:var(--brand-teal); } 80% { border-bottom-color:var(--brand-pink); } }
@supports (animation-timeline:view()) {
  .declaration > p,.declaration h2,.declaration-note,.work-head,.work-list,.approach-copy,.steps,.contact > * { animation:rise-in .8s both; animation-timeline:view(); animation-range:entry 8% cover 28%; }
}
@media (prefers-reduced-motion:reduce) { *,*::before,*::after { animation:none!important; scroll-behavior:auto!important; } }

@media (max-width:900px) {
  section { scroll-margin-top:70px; }
  .topbar { min-height:69px; grid-template-columns:1fr auto; padding:12px 20px; }
  .topbar nav { display:none; }
  .brand { font-size:19px; }
  .brand img { width:36px; height:36px; }
  .domain { font-size:11px; padding:6px 12px; }
  .opening { min-height:auto; padding:22px 20px 54px; }
  .opening-topline { font-size:10px; padding-bottom:14px; }
  .opening-layout { display:block; padding:58px 0 0; }
  .opening-copy-block { width:100%; }
  .opening h1 { font-size:clamp(40px,8vw,60px); line-height:1.18; letter-spacing:-.02em; }
  .opening-copy { margin:24px 0 0 3%; font-size:15px; max-width:94%; }
  .opening-visual { gap:34px; margin-top:58px; }
  .hero-mark-wrap { right:-8%; bottom:-8%; width:min(48vw,220px); opacity:.02; }
  .hero-panel { padding-top:16px; }
  .hero-panel > p { margin-bottom:10px; font-size:11px; }
  .hero-panel ol { gap:0 20px; }
  .hero-panel li { font-size:clamp(18px,4.8vw,24px); padding:12px 0; }
  .hero-panel li::after { font-size:15px; }
  .hero-panel > span { margin-top:14px; font-size:12px; }
  .read-next { margin:34px 0 0 3%; gap:12px; }
  .read-next span { font-size:18px; }
  .declaration { min-height:480px; padding-top:clamp(68px,9vw,88px); padding-bottom:clamp(72px,10vw,95px); }
  .declaration > p { font-size:16px; max-width:100%; }
  .declaration h2 { font-size:clamp(34px,8vw,48px); letter-spacing:-.02em; }
  .declaration-note { flex-direction:column; gap:18px; margin-left:0; margin-top:clamp(48px,8vw,65px); padding-left:20px; border-left-width:3px; }
  .declaration-note span { font-size:clamp(32px,7vw,44px); }
  .declaration-note p { font-size:16px; margin-top:8px; }
  .work { padding-top:clamp(72px,10vw,92px); padding-bottom:clamp(68px,9vw,85px); }
  .work-head { gap:16px; margin-bottom:clamp(48px,8vw,68px); }
  .work-head p { font-size:11px; }
  .work-head h2 { font-size:clamp(38px,8vw,52px); }
  .work-list { gap:0; }
  .work-list details { padding:clamp(20px,3vw,24px) 0; border-radius:0; }
  .work-list summary { gap:14px; }
  .work-list summary span { font-size:13px; }
  .work-list summary strong { font-size:clamp(22px,5.5vw,30px); }
  .work-list summary i { font-size:26px; }
  .work-list details > div { margin-left:0; padding-top:20px; max-width:100%; }
  .work-list details > div p { font-size:15px; }
  .work-list details > div b { font-size:19px; }
  .approach { min-height:auto; padding-top:clamp(68px,9vw,85px); padding-bottom:clamp(72px,10vw,92px); gap:clamp(42px,7vw,58px); }
  .approach-copy > p:first-child { font-size:11px; }
  .approach h2 { font-size:clamp(34px,8vw,48px); letter-spacing:-.02em; }
  .approach-text { margin-top:24px; font-size:16px; max-width:100%; }
  .steps { grid-template-columns:1fr; gap:16px; }
  .steps li { padding:clamp(24px,3.5vw,30px); }
  .steps b { font-size:11px; }
  .steps span { font-size:clamp(22px,5vw,28px); }
  .steps p { font-size:14px; }
  .contact { min-height:420px; padding-top:clamp(72px,10vw,88px); padding-bottom:clamp(68px,9vw,82px); }
  .contact > p { font-size:11px; }
  .contact h2 { margin-bottom:clamp(34px,5vw,44px); font-size:clamp(34px,8vw,48px); letter-spacing:-.02em; }
  .contact a { flex-direction:row; align-items:center; gap:12px; padding:0 0 12px; font-size:clamp(18px,4.5vw,24px); border-radius:0; }
  .contact a span { font-size:1.3em; }
  .contact small { max-width:100%; font-size:12px; margin-top:22px; }
  footer { grid-template-columns:36px 1fr; gap:12px; font-size:12px; padding:14px 20px; }
  footer .icp, footer p:nth-of-type(2), footer a { grid-column:2; }
}