/* ============ 瑞肽生物 RUITAI BIO — editorial paper theme ============ */
:root{
  --paper:#f4efe6;
  --paper-2:#ece4d5;
  --card:#fbf8f1;
  --white:#fffdf9;
  --ink:#17140f;
  --ink-2:#514a40;
  --muted:#7c7367;
  --rule:#d9cfbe;
  --rule-dark:#b9ad97;
  --rust:#a8402a;
  --rust-soft:#c4634a;
  --wa:#25d366;
  --mono:ui-monospace,SFMono-Regular,'SF Mono',Menlo,Consolas,monospace;
  --sans:-apple-system,BlinkMacSystemFont,'Segoe UI','Helvetica Neue','PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;
  --serif:'Iowan Old Style','Palatino Linotype',Palatino,Georgia,'Songti SC',serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:76px}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font:15px/1.75 var(--sans);
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
button,input{font:inherit}
button{cursor:pointer}
button:disabled{opacity:.3;cursor:default}
::selection{background:var(--rust);color:var(--paper)}

/* ---------- notice ---------- */
.notice{background:var(--ink);color:#c9bfae;text-align:center;font:600 10.5px/1 var(--mono);letter-spacing:.22em;padding:9px 16px;text-transform:uppercase}

/* ---------- header ---------- */
.site-header{
  display:flex;align-items:center;justify-content:space-between;gap:28px;
  padding:16px 4.5%;background:var(--paper);
  border-bottom:1px solid var(--rule);
  position:sticky;top:0;z-index:20;
}
.brand{display:flex;align-items:center;gap:13px}
.brand-mark{
  display:grid;place-items:center;width:38px;height:38px;
  border:1.5px solid var(--ink);color:var(--ink);
  font:700 13px/1 var(--mono);letter-spacing:.06em;
}
.brand-text{display:flex;flex-direction:column;line-height:1.2;font-size:17px;font-weight:700;letter-spacing:.04em}
.brand-text em{font-style:normal;font:600 9px/1.6 var(--mono);letter-spacing:.24em;color:var(--rust);margin-top:2px}
.site-nav{display:flex;gap:26px;font-size:12.5px;letter-spacing:.08em;color:var(--ink-2)}
.site-nav a{padding:5px 0;border-bottom:1px solid transparent;transition:.18s}
.site-nav a:hover{color:var(--rust);border-color:var(--rust)}
.lang-btn{
  background:none;border:1px solid var(--rule-dark);color:var(--ink);
  padding:7px 15px;font:600 11.5px/1 var(--mono);letter-spacing:.1em;transition:.18s;
}
.lang-btn:hover{background:var(--ink);color:var(--paper);border-color:var(--ink)}

/* ---------- hero ---------- */
.hero{border-bottom:1px solid var(--rule);background:
  linear-gradient(var(--rule) 1px,transparent 1px) 0 0/100% 68px,
  var(--paper);
  position:relative}
.hero::before{content:'';position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(90deg,var(--rule) 1px,transparent 1px) 0 0/68px 100%;
  opacity:.5}
.hero-inner{
  position:relative;max-width:1300px;margin:0 auto;padding:76px 4.5% 84px;
  display:grid;grid-template-columns:1.12fr .88fr;gap:7%;align-items:center;
}
.kicker{
  display:flex;align-items:center;gap:12px;margin:0 0 26px;
  font:700 10.5px/1 var(--mono);letter-spacing:.24em;color:var(--rust);
  text-transform:uppercase;
}
.kicker i{flex:0 0 42px;height:1px;background:var(--rust);display:block}
h1{
  font-size:clamp(42px,5.2vw,78px);line-height:1.06;letter-spacing:-.035em;
  margin:0 0 26px;font-weight:750;
}
.lead{max-width:540px;margin:0 0 34px;color:var(--ink-2);font-size:15.5px;line-height:1.85}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:50px}
.btn{
  display:inline-flex;align-items:center;gap:10px;
  background:var(--ink);color:var(--paper);padding:14px 24px;
  font-size:13px;font-weight:600;letter-spacing:.02em;
  transition:.2s;border:1px solid var(--ink);
}
.btn .arw{font-size:14px;transition:.2s}
.btn:hover{background:var(--rust);border-color:var(--rust)}
.btn:hover .arw{transform:translate(2px,-2px)}
.btn.ghost{background:none;color:var(--ink);border-color:var(--rule-dark)}
.btn.ghost:hover{background:var(--paper-2);color:var(--ink);border-color:var(--ink)}

.hero-stats{display:flex;list-style:none;margin:0;padding:0;max-width:560px;border-top:1px solid var(--rule-dark)}
.hero-stats li{flex:1;padding:18px 18px 0 0;border-right:1px solid var(--rule);}
.hero-stats li:last-child{border-right:0;padding-right:0}
.hero-stats b{display:block;font-family:var(--serif);font-size:26px;line-height:1.1;letter-spacing:-.01em;margin-bottom:6px}
.hero-stats span{font-size:11px;color:var(--muted);letter-spacing:.06em}

/* hero sheet */
.hero-visual{display:flex;justify-content:flex-end}
.sheet{
  margin:0;background:var(--white);border:1px solid var(--ink);
  padding:20px;width:min(100%,372px);
  box-shadow:12px 12px 0 rgba(23,20,15,.09);
}
.sheet-head{display:flex;justify-content:space-between;align-items:baseline;
  font:700 9.5px/1 var(--mono);letter-spacing:.2em;color:var(--muted);
  padding-bottom:12px;border-bottom:1px solid var(--rule)}
.sheet-head b{color:var(--ink);font-size:12px;letter-spacing:.1em}
.sheet-plate{
  position:relative;aspect-ratio:1/1;margin:16px 0;
  display:grid;place-items:center;gap:2px;text-align:center;
  background:var(--paper-2);border:1px solid var(--rule);
  background-image:repeating-linear-gradient(135deg,rgba(168,64,42,.10) 0 1px,transparent 1px 9px);
}
.sheet-plate span{font-family:var(--serif);font-size:38px;letter-spacing:.14em;line-height:1}
.sheet-plate em{font-style:normal;font:600 10px/1 var(--mono);letter-spacing:.5em;color:var(--rust);margin-left:.5em}
.sheet-rows{margin:0;padding:0;display:flex;flex-direction:column}
.sheet-rows div{display:flex;justify-content:space-between;gap:14px;padding:8px 0;border-top:1px solid var(--rule)}
.sheet-rows div:first-child{border-top:0}
.sheet-rows dt{font:600 9.5px/1.8 var(--mono);letter-spacing:.16em;color:var(--muted)}
.sheet-rows dd{margin:0;font:600 10.5px/1.8 var(--mono);letter-spacing:.08em;color:var(--ink);text-align:right}

/* ---------- marquee ---------- */
.marquee{background:var(--rust);color:#f7ece2;overflow:hidden;padding:11px 0;border-bottom:1px solid var(--ink)}
.marquee-track{display:flex;align-items:center;gap:26px;width:max-content;
  font:700 10.5px/1 var(--mono);letter-spacing:.26em;
  animation:slide 34s linear infinite}
.marquee-track i{font-style:normal;opacity:.5}
@keyframes slide{to{transform:translateX(-50%)}}

/* ---------- sections ---------- */
.section{max-width:1300px;margin:0 auto;padding:92px 4.5%}
.section.alt{max-width:none;background:var(--paper-2);border-top:1px solid var(--rule);border-bottom:1px solid var(--rule)}
.section.alt>*{max-width:1190px;margin-left:auto;margin-right:auto}
.section.alt small{display:block;text-align:center;color:var(--muted);font-size:11.5px;margin-top:38px;letter-spacing:.03em}
.eyebrow{font:700 10px/1 var(--mono);letter-spacing:.26em;color:var(--rust);text-transform:uppercase;margin:0 0 18px}
h2{font-size:clamp(27px,3.1vw,40px);line-height:1.24;letter-spacing:-.028em;font-weight:700;margin:0 0 18px}
.section-head{display:flex;justify-content:space-between;align-items:flex-end;gap:48px;
  padding-bottom:26px;border-bottom:1.5px solid var(--ink);margin-bottom:34px;flex-wrap:wrap}
.head-note{color:var(--muted);font-size:13px;line-height:1.85;margin:0 0 4px;max-width:400px}

/* ---------- toolbar ---------- */
.toolbar{display:flex;align-items:center;gap:12px;margin-bottom:26px;flex-wrap:wrap}
.search{display:flex;align-items:center;gap:10px;flex:1;min-width:250px;max-width:440px;
  background:var(--white);border:1px solid var(--rule-dark);padding:11px 16px;color:var(--rust)}
.search:focus-within{border-color:var(--ink);box-shadow:0 0 0 3px rgba(168,64,42,.12)}
.search input{border:0;outline:0;background:none;width:100%;font-size:14px;color:var(--ink)}
.search input::placeholder{color:#a89c8b}
.mini-btn{background:none;border:1px solid var(--rule-dark);padding:10px 18px;font-size:12.5px;color:var(--ink-2);transition:.18s}
.mini-btn:hover{border-color:var(--ink);color:var(--ink);background:var(--paper-2)}
.count{margin-left:auto;font:600 11.5px/1 var(--mono);letter-spacing:.12em;color:var(--muted)}

/* ---------- catalog grid (hairline table) ---------- */
.grid{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(248px,1fr));
  gap:1px;background:var(--rule);border:1px solid var(--rule);
}
.card{
  position:relative;display:flex;flex-direction:column;gap:9px;text-align:left;
  background:var(--card);border:0;padding:18px 18px 15px;
  transition:background .18s,box-shadow .18s;
}
.card:hover{background:var(--white);box-shadow:inset 0 0 0 1.5px var(--ink);z-index:1}
.card .number{font:600 9.5px/1 var(--mono);letter-spacing:.2em;color:var(--rust)}
.card .photo{display:block;background:var(--paper-2);border:1px solid var(--rule);overflow:hidden}
.card .photo img{display:block;width:100%;aspect-ratio:1;object-fit:contain;padding:11px;transition:.3s}
.card:hover .photo img{transform:scale(1.04)}
.card .symbol{position:absolute;top:14px;right:16px;font-size:16px;color:var(--rule-dark);transition:.18s}
.card:hover .symbol{color:var(--rust)}
.card h3{margin:2px 0 0;font-size:15px;line-height:1.4;font-weight:650;letter-spacing:-.01em;padding-right:22px}
.card p{margin:0;font-size:12.5px;color:var(--muted);font-family:var(--mono);letter-spacing:.02em}
.card .go{margin-top:auto;padding-top:11px;border-top:1px solid var(--rule);
  font-size:11.5px;font-weight:600;letter-spacing:.04em;color:var(--ink-2);
  display:flex;align-items:center;justify-content:space-between}
.card .go span{transition:.18s;color:var(--rust)}
.card:hover .go span{transform:translate(2px,-2px)}

/* ---------- pagination ---------- */
.pagination{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-top:26px;
  border-top:1px solid var(--rule);padding-top:20px}
.pagination button{background:none;border:1px solid var(--rule-dark);padding:9px 18px;font-size:12.5px;transition:.18s}
.pagination button:hover:not(:disabled){background:var(--ink);color:var(--paper);border-color:var(--ink)}
.pagination span{font:600 11.5px/1 var(--mono);letter-spacing:.14em;color:var(--muted)}
.source-note{font-size:11.5px;line-height:1.8;color:var(--muted);margin:30px 0 0;max-width:760px}
#empty{color:var(--muted);text-align:center;padding:44px 0;font-size:14px}

/* ---------- documents ---------- */
.doc-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(228px,1fr));gap:0;margin-top:40px;
  border-top:1.5px solid var(--ink)}
.doc-grid article{padding:26px 26px 30px;border-right:1px solid var(--rule);transition:background .18s}
.doc-grid article:last-child{border-right:0}
.doc-grid article:hover{background:var(--card)}
.doc-grid b{display:inline-block;font:700 11px/1 var(--mono);letter-spacing:.2em;color:var(--rust);
  border-bottom:2px solid var(--rust);padding-bottom:7px;margin-bottom:22px}
.doc-grid h3{margin:0 0 10px;font-size:16px;font-weight:650;letter-spacing:-.01em}
.doc-grid p{margin:0;font-size:13px;line-height:1.8;color:var(--ink-2)}

/* ---------- about ---------- */
.about{display:grid;grid-template-columns:1fr 1fr;gap:8%;align-items:start;
  border-top:1px solid var(--rule)}
.about p{color:var(--ink-2);margin:0 0 18px;font-size:14.5px;line-height:1.85}
.text-link{display:inline-block;font-size:13px;font-weight:600;color:var(--rust);
  border-bottom:1px solid var(--rust);padding-bottom:2px;transition:.18s}
.text-link:hover{color:var(--ink);border-color:var(--ink)}

/* ---------- contact ---------- */
.contact{padding-top:0}
.contact-card{
  display:flex;justify-content:space-between;align-items:center;gap:44px;flex-wrap:wrap;
  background:var(--ink);color:#e8dfd1;padding:56px 5%;
  position:relative;overflow:hidden;
}
.contact-card::after{content:'';position:absolute;inset:0;pointer-events:none;
  background-image:repeating-linear-gradient(135deg,rgba(244,239,230,.05) 0 1px,transparent 1px 11px)}
.contact-copy{position:relative;z-index:1}
.contact-card .eyebrow{color:var(--rust-soft)}
.contact-card h2{color:var(--white);margin-bottom:14px}
.contact-card p{color:#b3a894;max-width:520px;margin:0;font-size:14px;line-height:1.8}
.wa-button{
  position:relative;z-index:1;display:inline-flex;align-items:center;gap:12px;
  background:var(--wa);color:#06301a;font-weight:700;font-size:13.5px;
  padding:16px 26px;white-space:nowrap;transition:.18s;
}
.wa-button:hover{background:#20c05c;transform:translateY(-2px)}
.wa-button.small{padding:11px 18px;font-size:12.5px;margin:0 0 16px}

/* ---------- floating WhatsApp ---------- */
.wa-float{position:fixed;right:20px;bottom:20px;z-index:40;display:grid;place-items:center;
  width:54px;height:54px;background:var(--wa);color:#fff;
  box-shadow:0 8px 22px rgba(37,211,102,.4);transition:.18s}
.wa-float:hover{transform:translateY(-3px)}
.wa-float::before{content:'';position:absolute;inset:-5px;border:1.5px solid rgba(37,211,102,.55);
  animation:pulse 2.2s ease-out infinite}
@keyframes pulse{0%{transform:scale(.85);opacity:1}100%{transform:scale(1.3);opacity:0}}

/* ---------- footer ---------- */
.site-footer{background:var(--paper-2);border-top:1.5px solid var(--ink)}
.footer-inner{max-width:1300px;margin:0 auto;padding:56px 4.5% 30px}
.footer-top{display:flex;justify-content:space-between;align-items:center;gap:32px;flex-wrap:wrap;
  padding-bottom:34px;border-bottom:1px solid var(--rule)}
.footer-top>p{margin:0;font-family:var(--serif);font-size:19px;letter-spacing:-.01em;color:var(--ink-2)}
.footer-bottom{display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap;padding-top:20px;
  font:600 11px/1.8 var(--mono);letter-spacing:.12em;color:var(--muted)}
.footer-links{display:flex;gap:20px}
.footer-links a:hover{color:var(--rust)}

/* ---------- dialog ---------- */
dialog{border:1.5px solid var(--ink);padding:34px 36px 30px;max-width:520px;width:calc(100% - 40px);
  background:var(--paper);color:var(--ink);box-shadow:14px 14px 0 rgba(23,20,15,.16)}
dialog::backdrop{background:rgba(23,20,15,.55)}
dialog h2{margin:0 0 4px;font-size:25px;letter-spacing:-.02em;padding-right:34px}
dialog .field-label{margin:16px 0 4px;font:600 10px/1 var(--mono);letter-spacing:.22em;color:var(--muted);text-transform:uppercase}
dialog strong{display:block;font-size:15px;font-weight:650;color:var(--rust);margin:0 0 16px;
  font-family:var(--mono);letter-spacing:.02em}
dialog .source-note{margin:0 0 20px}
.detail-photo{display:block;margin:0 0 18px;background:var(--paper-2);border:1px solid var(--rule);overflow:hidden}
.detail-photo img{display:block;width:100%;max-height:250px;object-fit:contain;padding:16px}
.detail-photo small{display:block;text-align:center;font-size:10.5px;color:var(--muted);padding:0 12px 12px;letter-spacing:.06em}
#close{position:absolute;top:14px;right:16px;width:32px;height:32px;background:none;
  border:1px solid var(--rule-dark);color:var(--ink-2);font-size:17px;line-height:1;transition:.18s}
#close:hover{background:var(--ink);color:var(--paper);border-color:var(--ink)}

/* ---------- responsive ---------- */
@media (max-width:940px){
  .hero-inner{grid-template-columns:1fr;gap:46px;padding:52px 4.5% 60px}
  .hero-visual{justify-content:flex-start;order:-1}
  .sheet{width:min(100%,330px)}
  .about{grid-template-columns:1fr;gap:34px}
  .section{padding:64px 4.5%}
  .section-head{gap:18px;align-items:flex-start}
  .site-nav{display:none}
  .count{margin-left:0;width:100%}
  .doc-grid article{border-right:0;border-bottom:1px solid var(--rule)}
  .doc-grid article:last-child{border-bottom:0}
}
@media (max-width:560px){
  h1{font-size:clamp(34px,9vw,46px)}
  .hero-actions .btn{flex:1;justify-content:center}
  .grid{grid-template-columns:repeat(auto-fill,minmax(150px,1fr))}
  .card{padding:14px 14px 12px}
  .card h3{font-size:14px}
  .contact-card{padding:40px 6%}
  dialog{padding:28px 22px 24px}
}