/* ============ 双肽生物 SHUANGTAI — violet tech theme ============ */
:root{
  --deep:#1c1038;
  --ink:#2b1d4e;
  --violet:#6d28d9;
  --violet-2:#8b5cf6;
  --lav:#a78bfa;
  --mist:#f5f1ff;
  --line:#e4dafb;
  --muted:#6f6591;
  --paper:#faf8ff;
  --white:#ffffff;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:100px}
body{margin:0;background:var(--paper);color:var(--ink);font:15px/1.7 -apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Helvetica Neue',sans-serif}
a{color:inherit;text-decoration:none}
button,input{font:inherit}
button,a,input,summary{outline-offset:4px}
button{cursor:pointer}
button:disabled{opacity:.35;cursor:default}

/* ---------- notice ---------- */
.notice{background:linear-gradient(90deg,var(--deep),#3b1d6e);color:#d8ccf7;text-align:center;font-size:11px;letter-spacing:1.5px;padding:8px 16px}

/* ---------- header ---------- */
.site-header{display:flex;align-items:center;justify-content:space-between;padding:18px 5%;border-bottom:1px solid var(--line);background:rgba(255,255,255,.92);backdrop-filter:blur(10px);position:sticky;top:0;z-index:5;gap:24px}
.brand{display:flex;align-items:center;gap:12px}
.brand-mark{display:grid;place-items:center;width:42px;height:42px;background:linear-gradient(135deg,var(--violet-2),var(--violet));color:#fff;font:700 15px/1 ui-monospace,SFMono-Regular,monospace;letter-spacing:1px;clip-path:polygon(50% 0,100% 25%,100% 75%,50% 100%,0 75%,0 25%);box-shadow:0 4px 14px rgba(109,40,217,.35)}
.brand-text{font-size:19px;font-weight:700;letter-spacing:1.5px;color:var(--deep);display:flex;flex-direction:column;line-height:1.25}
.brand-text em{font-style:normal;font-size:9px;letter-spacing:3px;font-weight:600;color:var(--violet-2)}
.site-nav{display:flex;gap:28px;font-size:13.5px;color:var(--muted)}
.site-nav a{padding:6px 2px;border-bottom:2px solid transparent;transition:.2s}
.site-nav a:hover{color:var(--violet);border-color:var(--lav)}
.lang-btn{background:var(--white);border:1px solid var(--line);color:var(--violet);border-radius:0;padding:7px 16px;font-size:12px;font-weight:600;transition:.2s;clip-path:polygon(8px 0,100% 0,100% calc(100% - 8px),calc(100% - 8px) 100%,0 100%,0 8px)}
.lang-btn:hover{background:var(--mist);border-color:var(--lav)}

/* ---------- hero ---------- */
.hero{position:relative;background:radial-gradient(900px 460px at 85% -10%,rgba(167,139,250,.22),transparent 60%),var(--white);border-bottom:1px solid var(--line);overflow:hidden}
.hero-grid{position:absolute;inset:0;background-image:linear-gradient(rgba(109,40,217,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(109,40,217,.05) 1px,transparent 1px);background-size:44px 44px;mask-image:radial-gradient(70% 70% at 50% 30%,#000,transparent)}
.hero-inner{position:relative;display:grid;grid-template-columns:1.15fr 1fr;gap:6%;align-items:center;max-width:1280px;margin:0 auto;padding:70px 5%}
.badge{display:inline-flex;align-items:center;gap:8px;font-size:10.5px;letter-spacing:2.5px;font-weight:700;color:var(--violet);background:var(--mist);border:1px solid var(--line);padding:7px 16px;clip-path:polygon(8px 0,100% 0,100% calc(100% - 8px),calc(100% - 8px) 100%,0 100%,0 8px);margin:0 0 26px}
.badge i{width:7px;height:7px;background:var(--violet-2);transform:rotate(45deg);box-shadow:0 0 0 3px rgba(139,92,246,.18)}
h1{font-size:clamp(38px,4.4vw,64px);line-height:1.16;letter-spacing:-1px;margin:0 0 24px;color:var(--deep);font-weight:800}
.lead{max-width:520px;color:var(--muted);font-size:16px;margin:0 0 34px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:44px}
.btn{display:inline-flex;align-items:center;gap:8px;background:linear-gradient(135deg,var(--violet-2),var(--violet));color:#fff;padding:13px 26px;font-size:13.5px;font-weight:600;box-shadow:0 6px 18px rgba(109,40,217,.30);transition:.2s;clip-path:polygon(10px 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%,0 10px)}
.btn:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(109,40,217,.38)}
.btn.ghost{background:var(--white);color:var(--violet);border:1px solid var(--line);box-shadow:none}
.btn.ghost:hover{border-color:var(--lav);background:var(--mist)}
.hero-stats{display:flex;list-style:none;margin:0;padding:0;border:1px solid var(--line);background:var(--white);max-width:520px}
.hero-stats li{flex:1;padding:16px 18px;border-right:1px solid var(--line)}
.hero-stats li:last-child{border-right:0}
.hero-stats b{display:block;font-size:19px;color:var(--deep);letter-spacing:.5px}
.hero-stats span{font-size:11.5px;color:var(--muted)}

/* hero visual */
.hero-visual{display:flex;justify-content:center}
.visual-panel{background:linear-gradient(160deg,#241245,var(--deep) 55%,#120a26);padding:22px 22px 18px;width:min(100%,360px);box-shadow:0 24px 60px rgba(28,16,56,.4);position:relative;clip-path:polygon(18px 0,100% 0,100% calc(100% - 18px),calc(100% - 18px) 100%,0 100%,0 18px)}
.visual-head{display:flex;justify-content:space-between;color:#a68ede;font:600 10px/1 ui-monospace,monospace;letter-spacing:2px;margin-bottom:6px}
.visual-head b{color:#e9e2ff;letter-spacing:3px}
.hex{display:block;width:100%;height:auto}
.chips{display:flex;gap:8px;justify-content:center;margin-top:10px}
.chips span{font:700 10.5px/1 ui-monospace,monospace;letter-spacing:1.5px;color:#cdbcf5;background:rgba(167,139,250,.14);border:1px solid rgba(196,181,253,.35);padding:6px 13px;clip-path:polygon(6px 0,100% 0,100% calc(100% - 6px),calc(100% - 6px) 100%,0 100%,0 6px)}

/* ---------- ticker ---------- */
.ticker{background:var(--deep);overflow:hidden;padding:13px 0}
.ticker-track{display:flex;gap:44px;width:max-content;animation:tick 26s linear infinite;color:#8f7cc9;font:600 11px/1 ui-monospace,monospace;letter-spacing:3px}
.ticker-track i{font-style:normal;margin-left:44px;color:#4c3a80}
@keyframes tick{to{transform:translateX(-50%)}}

/* ---------- sections ---------- */
.section{padding:88px 5%;max-width:1280px;margin:0 auto}
.section.alt{background:var(--white);max-width:none}
.section.alt>*{max-width:1180px;margin-left:auto;margin-right:auto}
.section.alt small{display:block;text-align:center;color:var(--muted);margin-top:34px;font-size:12px}
.eyebrow{font-size:10.5px;letter-spacing:2.5px;font-weight:700;color:var(--violet);margin:0 0 18px}
h2{font-size:clamp(28px,3vw,38px);line-height:1.3;font-weight:800;margin:0 0 20px;color:var(--deep);letter-spacing:-.5px}
.section-head{display:flex;justify-content:space-between;align-items:flex-end;gap:40px;margin-bottom:40px;flex-wrap:wrap}
.section-head p:last-child{color:var(--muted);font-size:14px;margin:0;max-width:420px}

/* ---------- toolbar ---------- */
.toolbar{display:flex;align-items:center;gap:14px;margin-bottom:28px;flex-wrap:wrap}
.search{display:flex;align-items:center;gap:10px;background:var(--white);border:1px solid var(--line);padding:11px 18px;flex:1;min-width:240px;max-width:460px;color:var(--violet)}
.search:focus-within{border-color:var(--lav);box-shadow:0 0 0 4px rgba(167,139,250,.16)}
.search input{border:0;outline:0;background:none;width:100%;font-size:14px;color:var(--ink)}
.search input::placeholder{color:#a89cc9}
.mini-btn{background:var(--white);border:1px solid var(--line);padding:10px 18px;font-size:12.5px;color:var(--muted);transition:.2s}
.mini-btn:hover{color:var(--violet);border-color:var(--lav)}
.count{margin-left:auto;font-size:12.5px;color:var(--muted);font-variant-numeric:tabular-nums}

/* ---------- catalog grid ---------- */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(262px,1fr));gap:18px}
.card{position:relative;text-align:left;background:var(--white);border:1px solid var(--line);padding:20px 20px 16px;transition:.22s;display:flex;flex-direction:column;gap:8px;clip-path:polygon(14px 0,100% 0,100% calc(100% - 14px),calc(100% - 14px) 100%,0 100%,0 14px)}
.card:hover{transform:translateY(-4px);border-color:var(--lav);box-shadow:0 14px 34px rgba(109,40,217,.15)}
.card .number{font:600 10px/1 ui-monospace,monospace;letter-spacing:2px;color:var(--lav)}
.card .photo{display:block;margin:2px -4px 4px;background:linear-gradient(160deg,#f6f2ff,#eae1fd);border:1px solid var(--line);overflow:hidden;clip-path:polygon(10px 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%,0 10px)}
.card .photo img{display:block;width:100%;aspect-ratio:1;object-fit:contain;padding:12px;box-sizing:border-box;transition:.25s}
.card:hover .photo img{transform:scale(1.05)}
.card .symbol{position:absolute;top:16px;right:18px;font-size:18px;color:var(--line)}
.card h3{margin:0;font-size:16px;line-height:1.45;color:var(--deep);font-weight:700;padding-right:26px}
.card p{margin:0;font-size:13px;color:var(--muted)}
.card .go{margin-top:auto;padding-top:12px;font-size:12.5px;font-weight:700;color:var(--violet);display:inline-flex;gap:6px;align-items:center}
.card .go span{transition:.2s}
.card:hover .go span{transform:translate(2px,-2px)}

/* ---------- pagination ---------- */
.pagination{display:flex;align-items:center;justify-content:center;gap:18px;margin-top:36px}
.pagination button{background:var(--white);border:1px solid var(--line);padding:10px 20px;font-size:13px;color:var(--ink);transition:.2s}
.pagination button:hover:not(:disabled){border-color:var(--lav);color:var(--violet)}
.pagination span{font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums}
.source-note{font-size:12px;color:var(--muted);margin-top:34px;max-width:720px}
#empty{color:var(--muted);text-align:center;padding:40px 0}

/* ---------- documents ---------- */
.doc-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:18px;margin-top:44px}
.doc-grid article{background:var(--paper);border:1px solid var(--line);padding:26px 24px;transition:.2s;clip-path:polygon(12px 0,100% 0,100% calc(100% - 12px),calc(100% - 12px) 100%,0 100%,0 12px)}
.doc-grid article:hover{border-color:var(--lav);transform:translateY(-3px)}
.doc-grid b{display:inline-grid;place-items:center;min-width:52px;height:30px;padding:0 12px;background:linear-gradient(135deg,var(--violet-2),var(--violet));color:#fff;font:700 11.5px/1 ui-monospace,monospace;letter-spacing:1.5px;margin-bottom:18px;clip-path:polygon(6px 0,100% 0,100% calc(100% - 6px),calc(100% - 6px) 100%,0 100%,0 6px)}
.doc-grid h3{margin:0 0 10px;font-size:16px;color:var(--deep)}
.doc-grid p{margin:0;font-size:13.5px;color:var(--muted)}

/* ---------- about ---------- */
.about{display:grid;grid-template-columns:1fr 1fr;gap:7%;align-items:start}
.about p{color:var(--muted);margin:0 0 18px;font-size:15px}
.text-link{display:inline-block;font-size:13.5px;font-weight:700;color:var(--violet);border-bottom:1px solid var(--lav);padding-bottom:2px;transition:.2s}
.text-link:hover{color:var(--violet-2)}

/* ---------- contact ---------- */
.contact{padding-top:0}
.contact-card{display:flex;justify-content:space-between;align-items:center;gap:40px;background:linear-gradient(140deg,#241245,var(--deep) 60%,#120a26);color:#ddd0f7;padding:52px 6%;position:relative;overflow:hidden;flex-wrap:wrap;clip-path:polygon(20px 0,100% 0,100% calc(100% - 20px),calc(100% - 20px) 100%,0 100%,0 20px)}
.contact-card::after{content:'';position:absolute;inset:0;background-image:radial-gradient(rgba(167,139,250,.16) 1px,transparent 1px);background-size:20px 20px;pointer-events:none}
.contact-card>*{position:relative;z-index:1}
.contact-card .eyebrow{color:var(--lav)}
.contact-card h2{color:#fff;margin-bottom:12px}
.contact-card p{color:#b3a3dd;max-width:520px;margin:0;font-size:14.5px}
.wa-button{display:inline-flex;align-items:center;gap:12px;background:#25d366;color:#06351c;font-weight:700;padding:16px 28px;font-size:14px;white-space:nowrap;transition:.2s;box-shadow:0 8px 22px rgba(37,211,102,.35);clip-path:polygon(10px 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%,0 10px)}
.wa-button:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(37,211,102,.45)}
.wa-button.small{padding:11px 20px;font-size:13px;margin:0 0 14px}

/* ---------- floating WhatsApp ---------- */
.wa-float{position:fixed;right:22px;bottom:22px;z-index:50;display:grid;place-items:center;width:58px;height:58px;background:#25d366;color:#fff;box-shadow:0 10px 26px rgba(37,211,102,.45);transition:.2s;clip-path:polygon(50% 0,100% 25%,100% 75%,50% 100%,0 75%,0 25%)}
.wa-float:hover{transform:scale(1.1)}
.wa-float::before{content:'';position:absolute;inset:-4px;border:2px solid rgba(37,211,102,.5);animation:wa-pulse 2s ease-out infinite;clip-path:polygon(50% 0,100% 25%,100% 75%,50% 100%,0 75%,0 25%)}
@keyframes wa-pulse{0%{transform:scale(.85);opacity:1}100%{transform:scale(1.3);opacity:0}}

/* ---------- faq ---------- */
.faq-list{max-width:820px;margin-top:36px;display:flex;flex-direction:column;gap:12px}
.faq-list details{background:var(--white);border:1px solid var(--line);padding:4px 24px;transition:.2s}
.faq-list details[open]{border-color:var(--lav);box-shadow:0 8px 24px rgba(109,40,217,.09)}
.faq-list summary{cursor:pointer;list-style:none;font-weight:700;color:var(--deep);padding:16px 30px 16px 0;position:relative;font-size:15px}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary::after{content:'+';position:absolute;right:2px;top:50%;transform:translateY(-50%);font-size:20px;font-weight:400;color:var(--violet-2);transition:.2s}
.faq-list details[open] summary::after{transform:translateY(-50%) rotate(45deg)}
.faq-list details p{margin:0 0 18px;color:var(--muted);font-size:14px}

/* ---------- footer ---------- */
.site-footer{background:var(--deep);color:#b3a3dd;margin-top:40px}
.footer-inner{max-width:1280px;margin:0 auto;padding:64px 5% 34px;display:flex;flex-direction:column;gap:20px}
.footer-brand .brand-text{color:#efe9ff}
.footer-brand .brand-text em{color:var(--lav)}
.footer-inner>p{margin:0;font-size:16px}
.footer-bottom{border-top:1px solid rgba(167,139,250,.18);padding-top:22px;font-size:12.5px;color:#8f7cc9;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
.footer-bottom a{color:#cdbcf5}
.footer-bottom a:hover{color:#fff}

/* ---------- dialog ---------- */
dialog{border:0;padding:36px 38px 32px;max-width:520px;width:calc(100% - 40px);color:var(--ink);box-shadow:0 30px 80px rgba(28,16,56,.4);clip-path:polygon(18px 0,100% 0,100% calc(100% - 18px),calc(100% - 18px) 100%,0 100%,0 18px)}
dialog::backdrop{background:rgba(28,16,56,.55);backdrop-filter:blur(4px)}
dialog h2{margin:0 0 6px;font-size:24px;color:var(--deep);letter-spacing:-.3px;padding-right:30px}
.detail-photo{display:block;margin:0 0 18px;background:linear-gradient(160deg,#f6f2ff,#eae1fd);border:1px solid var(--line);overflow:hidden;clip-path:polygon(12px 0,100% 0,100% calc(100% - 12px),calc(100% - 12px) 100%,0 100%,0 12px)}
.detail-photo img{display:block;width:100%;max-height:260px;object-fit:contain;padding:18px;box-sizing:border-box}
.detail-photo small{display:block;text-align:center;font-size:11px;color:var(--muted);padding:0 12px 12px}
dialog strong{display:block;font-size:16px;color:var(--violet);margin:0 0 14px}
dialog .source-note{margin:0 0 20px}
dialog a#original{font-size:13.5px;font-weight:700;color:var(--violet);border-bottom:1px solid var(--lav)}
#close{position:absolute;top:16px;right:18px;width:34px;height:34px;border:1px solid var(--line);background:var(--white);color:var(--muted);font-size:18px;line-height:1;transition:.2s}
#close:hover{color:var(--violet);border-color:var(--lav)}

/* ---------- responsive ---------- */
@media (max-width:900px){
  .hero-inner{grid-template-columns:1fr;padding:48px 5%;gap:44px}
  .hero-visual{order:-1}
  .visual-panel{width:min(100%,320px)}
  .about{grid-template-columns:1fr}
  .section-head{flex-direction:column;align-items:flex-start;gap:16px}
  .site-nav{display:none}
  .count{margin-left:0;width:100%}
}