/* ============================================
   云南森纳生物科技 Senna Biotech  v5
   ============================================ */
:root {
  --pri: #5f0080; --pri2: #7b2d8e;
  --w: #fff; --bg: #f8f6f9; --bg2: #f3eff5;
  --t: #392e3d; --t2: #77647f; --t3: #a89ab0; --b: #e8e0ec;
  --r: 12px; --rr: 8px;
  --sh: 0 2px 8px rgba(95,0,128,.06);
  --sh2: 0 8px 32px rgba(95,0,128,.1);
}
::selection{background:rgba(95,0,128,.15);color:var(--pri)}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{
  font-family:-apple-system,BlinkMacSystemFont,'PingFang SC','Microsoft YaHei','Noto Sans SC',sans-serif;
  color:var(--t);background:var(--w);line-height:1.7;
  -webkit-font-smoothing:antialiased;overflow-x:hidden
}
a{color:inherit;text-decoration:none}
ul{list-style:none}
img{max-width:100%;display:block;height:auto}
:focus-visible{outline:2px solid var(--pri);outline-offset:2px;border-radius:4px}

.container{max-width:1440px;margin:0 auto;padding:0 4%}
.section{display:flex;align-items:center;min-height:100vh;padding:80px 0}
.section .container{width:100%}
.section-gray{background:var(--bg);position:relative}
.section-gray::before{content:'';position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,var(--b),transparent)}
.section-gray-dark{background:linear-gradient(180deg,var(--bg),var(--bg2))}

/* ===== HEADER ===== */
.header{position:fixed;top:0;left:0;right:0;z-index:9999;display:flex;align-items:center;justify-content:space-between;padding:0 4%;height:64px;transition:background .4s,box-shadow .4s}
.header.light{background:rgba(255,255,255,.98);box-shadow:0 1px 0 rgba(95,0,128,.06)}
.header.dark{background:transparent}
.header .logo{display:flex;align-items:center;gap:9px;z-index:10000}
.header .logo img{width:34px;height:34px;object-fit:contain;border-radius:6px}
.header .logo .cn{font-size:12.5px;font-weight:700;line-height:1.2;letter-spacing:.3px}
.header .logo .en{font-size:8px;letter-spacing:1.2px;text-transform:uppercase}
.header.dark .logo .cn,.header.dark .logo .en{color:rgba(255,255,255,.45)}
.header.dark .logo .cn{color:#fff}
.header.light .logo .cn{color:var(--t)}
.header.light .logo .en{color:var(--t3)}

.nav{display:flex;gap:2px}
.nav a{padding:7px 15px;border-radius:6px;font-size:13px;font-weight:500;transition:all .2s;position:relative}
.nav a::after{content:'';position:absolute;bottom:2px;left:50%;transform:translateX(-50%) scaleX(0);width:16px;height:2px;border-radius:1px;transition:transform .25s}
.nav a.active::after,.nav a:hover::after{transform:translateX(-50%) scaleX(1)}
.header.dark .nav a{color:rgba(255,255,255,.82)}
.header.dark .nav a:hover,.header.dark .nav a.active{background:rgba(255,255,255,.12);color:#fff}
.header.dark .nav a::after{background:rgba(255,255,255,.6)}
.header.light .nav a{color:var(--t2)}
.header.light .nav a::after{background:var(--pri)}
.header.light .nav a:hover,.header.light .nav a.active{background:rgba(95,0,128,.04);color:var(--pri)}

.menu-btn{display:none;flex-direction:column;gap:5px;cursor:pointer;z-index:100000;padding:8px;background:none;border:none}
.menu-btn span{width:20px;height:1.5px;border-radius:1px;transition:all .3s}
.header.dark .menu-btn span{background:#fff}
.header.light .menu-btn span{background:var(--t)}

/* ===== BUTTONS ===== */
.btn{display:inline-flex;align-items:center;gap:6px;padding:13px 32px;border-radius:8px;font-size:14px;font-weight:600;transition:all .3s;cursor:pointer;border:none;font-family:inherit}
.btn-p{background:var(--pri);color:#fff;box-shadow:0 2px 8px rgba(95,0,128,.2)}
.btn-p:hover{background:var(--pri2);transform:translateY(-2px);box-shadow:0 8px 24px rgba(95,0,128,.35)}
.btn-o{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.3)}
.btn-o:hover{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.55);transform:translateY(-2px)}
.btn-w{background:#fff;color:var(--pri);box-shadow:0 2px 8px rgba(0,0,0,.06)}
.btn-w:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,0,0,.12)}

/* ===== FULLPAGE ===== */
#fp-nav{z-index:60!important}
#fp-nav ul li a span{background:var(--pri)!important;width:6px!important;height:6px!important;margin:-3px 0 0 -3px!important}
#fp-nav ul li a.active span{width:8px!important;height:8px!important;margin:-4px 0 0 -4px!important}
#fp-nav ul li .fp-tooltip{color:var(--pri)!important;font-size:12px!important;font-weight:600;background:var(--w);padding:4px 12px;border-radius:14px;box-shadow:var(--sh)}
.fp-watermark{display:none!important}
.fp-overflow{overflow-y:auto!important}

/* ===== SCROLL HINT ===== */
.scroll-hint{position:absolute;bottom:28px;left:50%;transform:translateX(-50%);z-index:10;display:flex;flex-direction:column;align-items:center;gap:4px;animation:float 2.5s ease-in-out infinite;cursor:pointer}
.scroll-hint .mouse{width:22px;height:34px;border:2px solid rgba(255,255,255,.3);border-radius:11px;position:relative}
.scroll-hint .mouse::after{content:'';position:absolute;top:6px;left:50%;transform:translateX(-50%);width:3px;height:6px;background:rgba(255,255,255,.5);border-radius:2px;animation:scroll-wheel 1.5s ease-in-out infinite}
.scroll-hint small{font-size:9px;letter-spacing:3px;color:rgba(255,255,255,.35)}
@keyframes float{0%,100%{transform:translateX(-50%) translateY(0)}50%{transform:translateX(-50%) translateY(-8px)}}
@keyframes scroll-wheel{0%{opacity:0;transform:translateX(-50%) translateY(0)}50%{opacity:1}100%{opacity:0;transform:translateX(-50%) translateY(8px)}}

/* ===== HERO ===== */
.hero{position:relative;overflow:hidden;text-align:center;color:#fff}
.hero-bg{position:absolute;inset:0;z-index:0}
.hero-bg img{width:100%;height:100%;object-fit:cover;opacity:.2}
.hero-mask{position:absolute;inset:0;background:linear-gradient(160deg,rgba(15,0,30,.88),rgba(40,0,60,.85));z-index:1}
.hero .container{position:relative;z-index:2;display:flex;flex-direction:column;align-items:center}
.hero-tag{display:inline-flex;align-items:center;gap:7px;font-size:13px;color:rgba(255,255,255,.65);margin-bottom:14px}
.hero-tag span{width:6px;height:6px;background:#c39bd3;border-radius:50%}
.hero h1{font-size:3.2rem;font-weight:800;letter-spacing:-.5px;line-height:1.3;margin-bottom:18px}
.hero h1 em{font-style:normal;color:#c39bd3}
.hero .container>p{max-width:560px;color:rgba(255,255,255,.5);font-size:1.05rem;margin-bottom:32px}
.hero-btns{display:flex;gap:14px;flex-wrap:wrap;justify-content:center}
.hero-stats{display:flex;gap:56px;margin-top:56px;flex-wrap:wrap;justify-content:center}
.hero-stats .n{font-size:2.4rem;font-weight:800;color:#c39bd3;line-height:1.1}
.hero-stats .l{font-size:12px;color:rgba(255,255,255,.4);margin-top:4px}

/* ===== SECTION HEADERS ===== */
.sec-badge{display:inline-block;padding:5px 16px;background:rgba(95,0,128,.08);color:var(--pri);border-radius:20px;font-size:12px;font-weight:700;letter-spacing:.5px;margin-bottom:14px}
.sec-title{font-size:2.2rem;font-weight:800;margin-bottom:12px;letter-spacing:-.2px}
.sec-desc{color:var(--t2);font-size:15px;margin-bottom:36px;max-width:560px}
.section-gray .sec-badge,.section-gray-dark .sec-badge{background:var(--w)}

/* ===== CARDS ===== */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.card{background:var(--w);border-radius:var(--r);overflow:hidden;box-shadow:var(--sh);transition:transform .3s,box-shadow .3s}
.card:hover{transform:translateY(-4px);box-shadow:var(--sh2)}
.card-img{overflow:hidden;position:relative}
.card-img img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .6s cubic-bezier(.4,0,.2,1)}
.card:hover .card-img img{transform:scale(1.06)}
.card-body{padding:24px 20px}
.card-body .tag{display:inline-block;padding:3px 10px;background:rgba(95,0,128,.08);color:var(--pri);border-radius:4px;font-size:11px;font-weight:600;margin-bottom:8px}
.card-body h3{font-size:17px;font-weight:700;margin-bottom:7px}
.card-body p{font-size:13px;color:var(--t2);line-height:1.65;margin-bottom:12px}
.link{display:inline-flex;align-items:center;gap:4px;font-size:13px;font-weight:600;color:var(--pri);transition:gap .2s}
.link:hover{gap:8px}

/* ===== SPLIT LAYOUT ===== */
.split{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.split-img{border-radius:var(--r);overflow:hidden;box-shadow:var(--sh)}
.split-img img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .6s}
.split-img:hover img{transform:scale(1.04)}
.split-text h2{font-size:2rem;font-weight:800;margin-bottom:16px;letter-spacing:-.2px}
.split-text p{color:var(--t2);margin-bottom:14px;font-size:14px;line-height:1.75}
.split-text ul{margin-bottom:18px}
.split-text ul li{position:relative;padding-left:20px;margin-bottom:6px;font-size:13px;color:var(--t2)}
.split-text ul li::before{content:'';position:absolute;left:0;top:9px;width:6px;height:6px;background:var(--pri);border-radius:50%}

/* ===== PAGE BANNER ===== */
.page-banner{padding:136px 0 76px;text-align:center;position:relative;overflow:hidden}
.page-banner::after{content:'';position:absolute;inset:0;background:linear-gradient(160deg,rgba(15,0,30,.9),rgba(20,0,35,.93))}
.page-banner .container{position:relative;z-index:1}
.page-banner h1{font-size:2.6rem;font-weight:800;color:#fff;letter-spacing:-.3px}
.page-banner .bread{font-size:13px;color:rgba(255,255,255,.45);margin-top:10px}
.page-banner .bread a{color:#c39bd3;transition:color .2s}
.page-banner .bread a:hover{color:#fff}

/* ===== PRODUCT ROW ===== */
.prod-row{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.prod-row.rev{direction:rtl}
.prod-row.rev .prod-info{direction:ltr}
.prod-img{border-radius:var(--r);overflow:hidden;box-shadow:var(--sh)}
.prod-img img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .5s}
.prod-img:hover img{transform:scale(1.04)}
.prod-info .prod-tag{display:inline-block;padding:4px 12px;background:rgba(95,0,128,.08);color:var(--pri);border-radius:4px;font-size:11px;font-weight:700;margin-bottom:10px}
.prod-info h2{font-size:2rem;font-weight:800;margin-bottom:12px}
.prod-info p{color:var(--t2);margin-bottom:14px;font-size:14px;line-height:1.75}
.tags{display:flex;flex-wrap:wrap;gap:7px;margin-bottom:18px}
.tags span{padding:5px 12px;background:var(--bg);color:var(--t2);border-radius:4px;font-size:12px;font-weight:500}
.specs-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px 20px}
.spec-item{display:flex;gap:8px;font-size:13px;padding:6px 0;border-bottom:1px solid var(--b)}
.spec-item .sl{color:var(--t3);white-space:nowrap;font-weight:500}
.spec-item .sv{color:var(--t);font-weight:600}

/* ===== PARTNERS & EQUIPMENT ===== */
.partner-swiper{padding:8px 0}
.partner-swiper .swiper-slide{width:auto!important}
.partner-tag{padding:12px 24px;background:var(--w);border:1px solid var(--b);border-radius:var(--rr);font-size:13px;font-weight:600;color:var(--t);white-space:nowrap;box-shadow:var(--sh);transition:all .2s}
.partner-tag:hover{border-color:var(--pri);color:var(--pri);box-shadow:var(--sh2)}
.equip-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.equip-item{text-align:center;padding:20px 14px;background:var(--w);border-radius:var(--rr);box-shadow:var(--sh);transition:all .2s}
.equip-item:hover{transform:translateY(-2px);box-shadow:var(--sh2)}
.equip-item .icon{font-size:1.8rem;margin-bottom:6px}
.equip-item .name{font-size:12px;font-weight:600;line-height:1.4}

/* ===== NEWS GRID ===== */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.news-card{background:var(--w);border-radius:var(--r);overflow:hidden;box-shadow:var(--sh);transition:transform .3s,box-shadow .3s}
.news-card:hover{transform:translateY(-3px);box-shadow:var(--sh2)}
.nc-img{overflow:hidden;aspect-ratio:16/10}
.nc-img img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.news-card:hover .nc-img img{transform:scale(1.05)}
.nc-body{padding:20px}
.nc-body .date{font-size:11px;color:var(--t3);margin-bottom:6px}
.nc-body h3{font-size:15px;font-weight:700;margin-bottom:6px;line-height:1.4}
.nc-body p{font-size:12px;color:var(--t2);line-height:1.6}

/* ===== CONTACT ===== */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px}
.contact-info h2{font-size:2rem;font-weight:800;margin-bottom:10px}
.contact-info .sub{color:var(--t2);font-size:14px;margin-bottom:28px}
.ci-row{display:flex;gap:14px;margin-bottom:18px}
.ci-row .ic{font-size:1.5rem;line-height:1;flex-shrink:0;width:32px;text-align:center}
.ci-row h4{font-size:14px;font-weight:700;margin-bottom:2px}
.ci-row p{font-size:13px;color:var(--t2)}
.contact-form{background:var(--w);border-radius:var(--r);box-shadow:var(--sh2);padding:36px 32px}
.contact-form h3{font-size:1.3rem;font-weight:700;margin-bottom:22px}
.field{margin-bottom:16px}
.field label{display:block;font-size:12px;font-weight:600;margin-bottom:6px;color:var(--t)}
.field input,.field select,.field textarea{width:100%;padding:12px 16px;border:1px solid var(--b);border-radius:var(--rr);font-size:14px;font-family:inherit;background:var(--bg);color:var(--t);transition:all .2s;outline:none}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--pri);box-shadow:0 0 0 3px rgba(95,0,128,.06);background:var(--w)}
.field textarea{min-height:130px;resize:vertical}
.btn-submit{width:100%;padding:14px;background:linear-gradient(135deg,var(--pri),var(--pri2));color:#fff;border:none;border-radius:var(--rr);font-size:14px;font-weight:600;cursor:pointer;transition:all .3s;font-family:inherit;box-shadow:0 2px 8px rgba(95,0,128,.15)}
.btn-submit:hover{transform:translateY(-1px);box-shadow:0 6px 20px rgba(95,0,128,.3)}
.form-ok{display:none;text-align:center;padding:40px 20px}

/* ===== TIMELINE ===== */
.timeline{position:relative;padding-left:44px}
.timeline::before{content:'';position:absolute;left:15px;top:8px;bottom:8px;width:1.5px;background:linear-gradient(180deg,var(--pri),var(--b))}
.timeline-item{position:relative;margin-bottom:34px}
.timeline-item:last-child{margin-bottom:0}
.timeline-item::before{content:'';position:absolute;left:-37px;top:6px;width:13px;height:13px;border-radius:50%;border:2.5px solid var(--pri);background:var(--w);box-shadow:0 0 0 5px rgba(95,0,128,.06);transition:all .3s}
.timeline-item:hover::before{background:var(--pri);box-shadow:0 0 0 8px rgba(95,0,128,.1)}
.timeline-item .year{font-size:12px;font-weight:700;color:var(--pri);margin-bottom:4px;letter-spacing:.5px}
.timeline-item h4{font-size:16px;font-weight:700;margin-bottom:4px}
.timeline-item p{font-size:13px;color:var(--t2)}

/* ===== CTA ===== */
.cta{background:linear-gradient(160deg,var(--pri),#3d0055);text-align:center;padding:80px 0}
.cta h2{font-size:2.2rem;font-weight:700;color:#fff;margin-bottom:12px}
.cta p{color:rgba(255,255,255,.6);font-size:1.05rem;margin-bottom:28px}

/* ===== FOOTER ===== */
.footer{background:linear-gradient(180deg,#160024,#0e0018);color:rgba(255,255,255,.45);padding:60px 0 28px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
.footer-grid h4{color:#fff;font-size:14px;font-weight:700;margin-bottom:14px}
.footer-grid li{margin-bottom:7px;font-size:12px}
.footer-grid a{color:rgba(255,255,255,.3);transition:color .2s}
.footer-grid a:hover{color:#c39bd3}
.footer-grid>div:first-child p{font-size:12px;line-height:1.7;max-width:240px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.05);padding-top:22px;display:flex;justify-content:space-between;align-items:center;font-size:11px;color:rgba(255,255,255,.2)}
.footer-bottom a{color:rgba(255,255,255,.2);transition:color .2s}
.footer-bottom a:hover{color:#c39bd3}

/* ===== BTT ===== */
.btt{position:fixed;bottom:32px;right:32px;z-index:99;width:42px;height:42px;border-radius:50%;background:var(--pri);color:#fff;border:none;font-size:16px;cursor:pointer;transition:all .35s;opacity:0;pointer-events:none;box-shadow:0 4px 16px rgba(95,0,128,.3)}
.btt.visible{opacity:1;pointer-events:all}
.btt:hover{background:var(--pri2);transform:translateY(-3px);box-shadow:0 8px 24px rgba(95,0,128,.4)}

/* ===== ANIMATIONS ===== */
.fade-up{opacity:0;transform:translateY(36px);transition:opacity .8s cubic-bezier(.4,0,.2,1),transform .8s cubic-bezier(.4,0,.2,1)}
.fade-up.in{opacity:1;transform:translateY(0)}

/* ===== MOBILE OVERLAY ===== */
@media(max-width:768px){
  .header{padding:0 3%}
  .menu-btn{display:flex}
  .nav{display:none}
  .mobile-overlay{position:fixed;inset:0;z-index:99999;display:none;background:rgba(14,0,26,.98);flex-direction:column;justify-content:flex-start;align-items:center;gap:8px;padding:100px 20px 40px;overflow-y:auto;-webkit-overflow-scrolling:touch}
  .mobile-overlay.open{display:flex}
  .mobile-overlay a{font-size:18px;padding:14px 32px;color:#fff;text-decoration:none}
  .mobile-overlay a:hover{color:#c39bd3}
  .header.light~.mobile-overlay{background:rgba(255,255,255,.98)}
  .header.light~.mobile-overlay a{color:var(--t2)}
  .header.light~.mobile-overlay a:hover{color:var(--pri)}
  .hero h1{font-size:2rem}
  .hero .container>p{font-size:.9rem}
  .hero-stats{flex-wrap:wrap;gap:28px}
  .hero-stats .n{font-size:1.8rem}
  .cards,.news-grid{grid-template-columns:1fr}
  .equip-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .sec-title{font-size:1.8rem}
  .section{padding:60px 0;min-height:auto}
  .split{gap:32px}
  .page-banner{padding:116px 0 56px}
  .page-banner h1{font-size:1.9rem}
  .specs-grid{grid-template-columns:1fr}
  .contact-form{padding:28px}
  .scroll-hint{display:none}
}

/* ===== TABLET ===== */
@media(max-width:1024px){
  .cards,.news-grid{grid-template-columns:1fr 1fr}
  .split,.prod-row{grid-template-columns:1fr;gap:44px}
  .prod-row.rev{direction:ltr}
  .equip-grid{grid-template-columns:repeat(3,1fr)}
  .contact-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .hero h1{font-size:2.6rem}
}