:root{
  --paper:#f1eadb;
  --paper-light:#f8f3e8;
  --ink:#243a2c;
  --muted:#756b59;
  --gold:#ad8139;
  --brown:#5a4430;
  --brown-deep:#403024;
  --line:#c7b58e;
  --book-w:350px;
  --book-h:540px;
  --ease:cubic-bezier(.22,.78,.22,1);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
html,body{margin:0;min-height:100%;background:var(--paper-light);color:var(--ink)}
body{font-family:"Microsoft YaHei","Noto Sans SC",sans-serif;overflow-x:hidden}

.page-bg{position:absolute;z-index:0;pointer-events:none;top:76px;left:0;width:100%;height:calc(100vh - 76px)}
.page-bg g{fill:none;stroke:#5d5548;stroke-width:1.95;stroke-linejoin:round;stroke-linecap:round}
.page-bg .mountains{opacity:.14}
.page-bg .shop-scene{opacity:.18}
.page-bg .shop-fill{fill:#9b896d;stroke:#5d5548}.page-bg .shop-dark{fill:#756249;stroke:#5d5548}.page-bg .shop-knob{fill:#5d5548;stroke:none}
.page-bg .right-scene{opacity:.15}.page-bg .medicine-chest .chest-body{fill:#9b896d;stroke:#5d5548;stroke-width:2.35}.page-bg .medicine-chest .chest-lid{stroke-width:2.35}.page-bg .medicine-chest .chest-handle{fill:none;stroke:#5d5548;stroke-width:2.35}.page-bg .medicine-chest .chest-panel{fill:#a9987c;stroke:#5d5548;stroke-width:2}

.site-header{
  position:sticky;top:0;z-index:30;height:76px;display:flex;align-items:center;justify-content:space-between;
  padding:0 20px;border-bottom:1px solid rgba(255,246,226,.24);
  background:var(--brown);color:#f7efdf;box-shadow:0 5px 18px rgba(58,39,24,.12)
}
.brand{display:flex;align-items:center;gap:12px;color:inherit;text-decoration:none}
.brand img{width:48px;height:48px;object-fit:contain;background:#f7f1e4;border-radius:50%;padding:3px}
.brand span{font-family:"FZKai-Z03","STKaiti","KaiTi",serif;font-size:22px;letter-spacing:.16em}
.site-header nav{display:flex;align-items:center;gap:32px}
.site-header nav a{color:inherit;text-decoration:none;font-size:14px}
.site-header nav a:not(.login){position:relative}
.site-header nav a:not(.login)::after{content:"";position:absolute;left:0;right:0;bottom:-6px;height:1px;background:var(--gold);opacity:0;transform:scaleX(.55);transition:opacity .25s,transform .25s}
.site-header nav a:not(.login):hover::after{opacity:1;transform:scaleX(1)}
.site-header .login{padding:9px 18px;border:1px solid rgba(255,246,226,.5)}
.site-header a:focus-visible{outline:2px solid #f4d597;outline-offset:4px}

.hero{
  position:relative;z-index:2;width:min(1440px,calc(100% - 64px));min-height:calc(100vh - 76px);
  margin:0 auto;padding:38px 0 104px;display:grid;grid-template-columns:minmax(340px,410px) minmax(0,1fr);
  align-items:center;gap:clamp(38px,4vw,66px)
}
.hero-copy{position:relative;max-width:410px;padding-left:8px}
.hero-copy h1{
  margin:0;font-family:"FZKai-Z03","STKaiti","KaiTi",serif;font-size:clamp(76px,7vw,112px);
  font-weight:500;line-height:.96;letter-spacing:.055em;white-space:nowrap
}
.subtitle{margin:24px 0 0;font-family:"STSong","SimSun",serif;font-size:clamp(17px,1.4vw,22px);letter-spacing:.28em;color:#805f28}
.title-rule{width:90px;height:1px;margin:29px 0 22px;background:var(--gold)}

.slogan-wheel{width:100%;height:180px;padding:7px 0;display:grid;grid-template-rows:32px 78px 32px 18px;align-items:center;overflow:hidden;cursor:default;outline:none}
.slogan-wheel p{margin:0;font-family:"STSong","SimSun",serif;transition:opacity .28s,transform .28s}
.slogan-wheel .waiting{max-width:95%;font-size:11px;line-height:1.5;color:var(--muted);opacity:.4}
.slogan-wheel .previous{transform:scale(.88);transform-origin:left bottom}
.slogan-wheel .next{transform:scale(.79);transform-origin:left top}
.slogan-wheel .current{font-size:clamp(18px,1.45vw,23px);line-height:1.65;color:var(--ink);font-weight:600}
.slogan-wheel.changing p{opacity:0;transform:translateY(-7px)}
.slogan-meta{display:flex;align-items:center;justify-content:space-between;width:132px;font-size:10px;color:#876a37;letter-spacing:.13em}
.slogan-meta span:last-child{opacity:.6}
.start{display:inline-flex;align-items:center;justify-content:space-between;gap:44px;min-width:190px;margin-top:18px;padding:14px 22px;background:var(--ink);border:1px solid var(--ink);color:white;text-decoration:none;letter-spacing:.16em;transition:.25s}
.start:hover,.start:focus-visible{background:var(--gold);border-color:var(--gold);transform:translateY(-2px)}

.card-area{position:relative;min-width:0;height:590px}
.card-stage{--deck-offset:max(58px,calc((100% - 654px)/2 + 66px));--selection-offset:max(28px,calc((100% - 892px)/2 + 34px));position:absolute;inset:8px 0 28px;overflow:visible}
.herb-card{
  --x:0px;--y:0px;position:absolute;top:0;left:0;width:var(--book-w);height:var(--book-h);z-index:var(--z);
  transform:translate3d(calc(var(--x) + var(--deck-offset)),var(--y),0) rotate(var(--r));
  transition:transform .72s var(--ease),filter .35s;perspective:1400px;cursor:pointer;outline:none;will-change:transform
}
.herb-card:focus-visible{filter:drop-shadow(0 0 0 #9e7532) drop-shadow(0 0 4px #9e7532)}
.card-inner{position:relative;width:100%;height:100%;transform-style:preserve-3d;transition:transform .76s var(--ease);box-shadow:10px 13px 0 rgba(62,53,36,.07);will-change:transform}
.herb-card.flipped .card-inner{transform:rotateY(180deg)}
.card-face{position:absolute;inset:0;display:block;overflow:hidden;border:1px solid color-mix(in srgb,var(--card) 63%,#706141);background:var(--card);backface-visibility:hidden;-webkit-backface-visibility:hidden;transform:translateZ(.1px);contain:paint}
.card-face::after{content:"";position:absolute;inset:12px;border:1px solid rgba(83,67,38,.23);pointer-events:none}
.card-back{transform:rotateY(180deg);padding:39px 36px;color:var(--ink)}

.book-spine{position:absolute;z-index:4;left:0;top:0;bottom:0;width:76px;display:flex;align-items:center;flex-direction:column;padding:23px 7px 20px;border-right:1px solid rgba(83,67,38,.28);background:color-mix(in srgb,var(--card) 92%,#6f5937)}
.book-spine b{writing-mode:vertical-rl;font-family:Georgia,"Times New Roman",serif;font-size:18px;letter-spacing:.045em;white-space:nowrap}
.book-spine span{margin-top:auto;writing-mode:vertical-rl;font-family:"STSong","SimSun",serif;font-size:14px;letter-spacing:.14em}
.book-spine small{margin-top:7px;writing-mode:vertical-rl;font:10px Georgia,"Times New Roman",serif;white-space:nowrap}
.card-content{position:absolute;inset:0 0 0 76px;padding:31px 25px 26px;opacity:1;transform:translateZ(.2px);backface-visibility:hidden}
.card-heading{position:relative;z-index:2;min-height:94px}
.card-heading .language{display:block;font-size:10px;letter-spacing:.17em;color:#6e624e}
.native-name{display:block;margin:8px 0 2px;font-family:Georgia,"Times New Roman",serif;font-size:28px;line-height:1.05;font-weight:500}
.chinese-name{display:flex;align-items:baseline;gap:9px;white-space:nowrap}
.chinese-name b{font-family:"FZKai-Z03","STKaiti","KaiTi",serif;font-size:42px;font-weight:500}
.chinese-name small{font-family:Georgia,"Times New Roman",serif;font-size:13px;color:#655b49}
.chinese-only{padding-top:10px}
.arabic-heading{text-align:right}
.arabic-heading .chinese-name{justify-content:flex-end}
.botanical{display:block;width:100%;height:342px;margin:-8px auto 0;object-fit:contain;filter:saturate(.86) contrast(.98);transform:translateZ(.25px);backface-visibility:hidden}
.learn-card,.flip-back{position:absolute;z-index:8;right:25px;bottom:24px;display:inline-flex;align-items:center;justify-content:center;gap:14px;min-height:36px;border:0;border-bottom:1px solid currentColor;background:transparent;color:inherit;padding:7px 2px;font:13px "Microsoft YaHei",sans-serif;letter-spacing:.11em;cursor:pointer}
.learn-card span,.flip-back span{display:inline-grid;place-items:center;width:24px;height:24px;margin:0;font-size:17px;pointer-events:none}
.learn-card:hover,.flip-back:hover{color:#8a6328}
.back-target span,.back-chinese span{display:block;margin-bottom:9px;color:#725d35;font-size:10px;letter-spacing:.18em;text-transform:uppercase}
.back-target h2{margin:0 0 13px;font:30px Georgia,"STSong",serif}
.back-target p,.back-chinese p{margin:0;font:13px/1.75 "STSong","SimSun",serif}
.back-divider{height:1px;margin:24px 0;background:rgba(83,67,38,.25)}

.card-ginseng{--card:#d7ddc8;--x:0px;--y:22px;--r:-.8deg;--z:1}
.card-astragalus{--card:#ead9a9;--x:76px;--y:13px;--r:-.4deg;--z:2}
.card-licorice{--card:#b8d2c5;--x:152px;--y:4px;--r:0deg;--z:3}
.card-angelica{--card:#d7b698;--x:228px;--y:13px;--r:.4deg;--z:4}
.card-mugwort{--card:#c8b276;--x:304px;--y:22px;--r:.8deg;--z:5}
.card-mugwort .book-spine b{font-family:Arial,sans-serif}

.card-stage.is-entering .herb-card{animation:book-arrival .92s var(--ease) both;animation-delay:calc(var(--arrival-order)*105ms);pointer-events:none}
@keyframes book-arrival{
  0%{transform:translate3d(calc(var(--deck-offset) + 980px),calc(var(--y) - 22px),0) rotate(2.8deg);opacity:0}
  58%{opacity:1}
  76%{transform:translate3d(calc(var(--deck-offset) + var(--x) - 15px),calc(var(--y) + 3px),0) rotate(calc(var(--r) - .6deg))}
  100%{transform:translate3d(calc(var(--deck-offset) + var(--x)),var(--y),0) rotate(var(--r));opacity:1}
}

.card-stage.has-selection .herb-card{
  transform:translate3d(calc(var(--selection-offset) + 368px + var(--spine-order)*58px),var(--stack-y),0) rotate(var(--stack-r));
  z-index:calc(4 + var(--spine-order))
}
.card-stage.has-selection .herb-card.selected{transform:translate3d(var(--selection-offset),0,0) rotate(0);z-index:30;cursor:default}
.reset-deck{position:absolute;right:4px;bottom:0;border:0;border-bottom:1px solid var(--ink);background:transparent;color:var(--ink);padding:7px 0;cursor:pointer;opacity:0;pointer-events:none;transition:.3s}
.card-area.has-picked .reset-deck{opacity:1;pointer-events:auto}

.value-strip{position:relative;z-index:20;height:76px;display:grid;grid-template-columns:repeat(5,1fr);border-top:1px solid var(--line);background:var(--brown);color:#f7efdf}
.value-strip div{display:grid;place-content:center;text-align:center;border-right:1px solid rgba(255,246,226,.16)}
.value-strip b{font:16px "STSong","SimSun",serif}
.value-strip small{margin-top:4px;color:rgba(247,239,223,.6)}

.info-block{position:relative;z-index:2;background:var(--paper);border-top:1px solid var(--line)}
.info-section{scroll-margin-top:84px}
.info-inner{width:min(1120px,calc(100% - 64px));margin:0 auto;padding:48px 0;display:grid;grid-template-columns:180px minmax(0,1fr);gap:48px;align-items:start}
.info-section + .info-section .info-inner{padding-top:0}
.info-title{margin:0;font-family:"FZKai-Z03","STKaiti","KaiTi",serif;font-size:26px;font-weight:500;letter-spacing:.08em;line-height:1.4}
.info-title::after{content:"";display:block;width:40px;height:1px;background:var(--gold);margin-top:14px}
.info-copy{max-width:660px}
#platform-intro .info-copy{max-width:885px}
.info-copy p{margin:0 0 14px;font-family:"STSong","SimSun",serif;font-size:15px;line-height:1.9;color:var(--ink)}
.info-copy p:last-child{margin-bottom:0}
.contact-label{color:var(--muted)}
.contact-mail{font-family:"STSong","SimSun",serif;font-size:15px;color:var(--ink);text-decoration:none;border-bottom:1px solid rgba(36,58,44,.3);transition:color .25s,border-color .25s}
.contact-mail:hover,.contact-mail:focus-visible{color:var(--gold);border-bottom-color:var(--gold)}

@media(max-width:1220px){
  .hero{width:min(960px,calc(100% - 48px));grid-template-columns:1fr;padding-bottom:36px;gap:22px}
  .hero-copy{max-width:720px;padding-left:0}
  .card-area{height:590px}
  .card-stage{width:900px;max-width:100%}
  .value-strip{position:relative}
  .page-bg{top:76px;height:calc(100vh - 76px)}
  .page-bg .shop-scene{opacity:.135}.page-bg .right-scene{opacity:.11}
}

@media(max-width:760px){
  :root{--book-w:280px;--book-h:500px}
  .site-header{height:66px;padding:0 14px}.brand img{width:36px;height:36px}.brand span{font-size:16px}.site-header nav{gap:14px}.site-header nav a{font-size:12px}.site-header .login{padding:7px 12px}
  .page-bg{top:66px;height:calc(100vh - 66px)}
  .page-bg .shop-scene{opacity:.055}.page-bg .right-scene{display:none}
  .hero{width:calc(100% - 36px);padding:42px 0 30px}.hero-copy h1{font-size:66px}.subtitle{font-size:15px;letter-spacing:.18em}.slogan-wheel{height:170px}.slogan-wheel .current{font-size:18px}
  .card-area{height:545px}.card-stage{overflow:hidden}
  .book-spine{width:55px;padding-left:5px;padding-right:5px}.book-spine b{font-size:14px}.book-spine span{font-size:11px}.book-spine small{font-size:8px}
  .card-content{left:55px;padding:27px 17px 23px}.card-heading{min-height:88px}.native-name{font-size:22px}.chinese-name b{font-size:35px}.chinese-name small{font-size:11px}.botanical{height:315px}
  .card-ginseng{--x:0px;--y:20px}.card-astragalus{--x:52px;--y:12px}.card-licorice{--x:104px;--y:4px}.card-angelica{--x:156px;--y:12px}.card-mugwort{--x:208px;--y:20px}
  .card-stage{--deck-offset:0px;--selection-offset:0px}
  .card-stage.has-selection .herb-card{transform:translate3d(calc(286px + var(--spine-order)*31px),var(--stack-y),0) rotate(0)}
  .card-stage.has-selection .herb-card.selected{transform:translate3d(0,0,0)}
  .card-back{padding:32px 27px}.back-target p,.back-chinese p{font-size:12px}.back-divider{margin:19px 0}
  .value-strip{height:64px}.value-strip b{font-size:11px}.value-strip small{display:none}
  .info-inner{width:calc(100% - 40px);padding:40px 0;grid-template-columns:1fr;gap:16px}.info-title{font-size:22px}.info-title::after{margin-top:10px}.info-copy p{font-size:15px}
}

@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto!important}*,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important}.card-stage.is-entering .herb-card{animation:none!important}}