/*=============================================
 ✨ 张家界莓茶茶厂 · 官方网站
 设计：莓茶奇幻科技风格 (Tea Wonder Tech)
 日期：2026-05-30
 =============================================*/

:root {
  --tea-deep: #1a5c3a; --tea-mid: #2d7a4f; --tea-bright: #7eb356;
  --tea-light: #a8d48a; --tea-pale: #d4ead0;
  --frost-white: #e8f5e9; --frost-glow: rgba(232,245,233,0.3);
  --gold: #c8a45c; --gold-light: #dbbc6e; --gold-dim: #a8842e;
  --teal: #0d9488; --teal-light: #14b8a6;
  --bg-deep: #0a1a10; --bg-section: #f4f8f0;
  --text-primary: #1a2e1a; --text-secondary: #5a7a5a; --text-muted: #8aa38a;
  --text-on-dark: #e8f5e9; --text-on-dark-dim: rgba(232,245,233,0.7);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08); --shadow-md: 0 4px 16px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.14); --shadow-card: 0 2px 12px rgba(10,26,16,0.08);
  --shadow-frost: 0 0 20px rgba(126,179,86,0.15);
  --nav-height: 72px; --max-width: 1200px;
  --radius-sm: 8px; --radius-md: 14px; --radius-lg: 20px; --radius-xl: 28px;
  --ease-out: cubic-bezier(0.25,0.46,0.45,0.94); --ease-spring: cubic-bezier(0.68,-0.55,0.265,1.55);
  --font-sans: -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",sans-serif;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased}
body{font-family:var(--font-sans);color:var(--text-primary);background:#fff;line-height:1.7;overflow-x:hidden;min-height:100vh}
a{color:inherit;text-decoration:none}img{max-width:100%;height:auto;display:block}
button{cursor:pointer;font-family:inherit;border:none;background:none}ul,ol{list-style:none}
.container{width:100%;max-width:var(--max-width);margin:0 auto;padding:0 24px}
h1,h2,h3,h4{font-weight:700;line-height:1.3}

.section-title{font-size:clamp(1.75rem,4vw,2.5rem);text-align:center;margin-bottom:0.5rem;color:var(--text-primary)}
.section-subtitle{text-align:center;color:var(--text-muted);font-size:1.05rem;margin-bottom:3rem;max-width:620px;margin-left:auto;margin-right:auto}
.frost-divider{width:60px;height:4px;background:linear-gradient(90deg,var(--tea-bright),var(--tea-light),var(--frost-white));border-radius:2px;margin:0.75rem auto 0;opacity:0.6}
.frost-divider.left{margin-left:0}

.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 32px;border-radius:var(--radius-md);font-weight:600;font-size:0.95rem;transition:all 0.3s var(--ease-out);border:2px solid transparent;white-space:nowrap}
.btn-primary{background:linear-gradient(135deg,var(--tea-bright),var(--tea-mid));color:#fff;box-shadow:0 4px 16px rgba(126,179,86,0.35)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 24px rgba(126,179,86,0.45)}
.btn-outline{border-color:var(--tea-mid);color:var(--tea-mid)}
.btn-outline:hover{background:var(--tea-mid);color:#fff}
.btn-gold{background:linear-gradient(135deg,var(--gold),var(--gold-light));color:#fff;box-shadow:0 4px 16px rgba(200,164,92,0.35)}
.btn-gold:hover{transform:translateY(-2px);box-shadow:0 6px 24px rgba(200,164,92,0.45)}
.btn-white{background:rgba(255,255,255,0.15);backdrop-filter:blur(8px);color:#fff;border-color:rgba(255,255,255,0.3)}
.btn-white:hover{background:rgba(255,255,255,0.25)}
.btn-wx{background:linear-gradient(135deg,#07c160,#06ad56);color:#fff;box-shadow:0 4px 16px rgba(7,193,96,0.35)}
.btn-wx:hover{transform:translateY(-2px);box-shadow:0 6px 24px rgba(7,193,96,0.45)}

/* Nav */
.nav{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(255,255,255,0.92);backdrop-filter:blur(12px);border-bottom:1px solid rgba(26,92,58,0.08);height:var(--nav-height);transition:box-shadow 0.3s}
.nav.scrolled{box-shadow:0 2px 20px rgba(0,0,0,0.08)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:100%;max-width:var(--max-width);margin:0 auto;padding:0 24px}
.nav-logo{display:flex;align-items:center;gap:10px;font-size:1.15rem;font-weight:700;color:var(--tea-deep)}
.nav-logo .logo-icon{width:38px;height:38px;border-radius:10px;background:linear-gradient(135deg,var(--tea-bright),var(--tea-mid));display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.3rem}
.nav-logo .official-badge{font-size:0.62rem;background:linear-gradient(135deg,var(--gold),var(--gold-light));color:#fff;padding:2px 8px;border-radius:10px;font-weight:600;letter-spacing:0.5px}
.nav-links{display:flex;gap:4px;align-items:center}
.nav-links a{padding:8px 18px;border-radius:8px;font-size:0.9rem;font-weight:500;color:var(--text-secondary);transition:all 0.2s}
.nav-links a:hover,.nav-links a.active{color:var(--tea-mid);background:rgba(126,179,86,0.08)}
.nav-wx-btn{display:flex;align-items:center;gap:6px;padding:8px 18px;border-radius:22px;font-size:0.85rem;font-weight:600;background:linear-gradient(135deg,#07c160,#06ad56);color:#fff;transition:all 0.3s;box-shadow:0 2px 10px rgba(7,193,96,0.25)}
.nav-wx-btn:hover{transform:translateY(-1px);box-shadow:0 4px 16px rgba(7,193,96,0.35)}

/* Hero */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;background:linear-gradient(170deg,#071a0e 0%,#0d2a15 30%,#163d22 60%,#1a4a2a 100%);overflow:hidden;padding-top:var(--nav-height)}
.hero::before{content:'';position:absolute;inset:0;background:radial-gradient(ellipse 80% 60% at 50% -10%,rgba(126,179,86,0.12) 0%,transparent 60%),radial-gradient(ellipse 40% 50% at 85% 60%,rgba(200,164,92,0.08) 0%,transparent 60%),radial-gradient(ellipse 30% 40% at 15% 30%,rgba(13,148,136,0.06) 0%,transparent 60%);pointer-events:none}
.hero-content{position:relative;z-index:2;max-width:720px}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,0.08);border:1px solid rgba(255,255,255,0.12);padding:6px 18px;border-radius:22px;font-size:0.8rem;color:var(--gold-light);margin-bottom:24px;backdrop-filter:blur(8px)}
.hero-badge .dot{width:7px;height:7px;background:var(--tea-bright);border-radius:50%;animation:pulse-dot 2s infinite}
@keyframes pulse-dot{0%,100%{opacity:1;transform:scale(1)}50%{opacity:0.5;transform:scale(1.5)}}
.hero h1{font-size:clamp(2.2rem,6vw,3.8rem);font-weight:800;color:#fff;line-height:1.15;margin-bottom:20px;letter-spacing:-0.5px}
.hero h1 .accent{background:linear-gradient(135deg,var(--tea-bright),var(--tea-light),var(--teal-light));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-subtitle{font-size:1.15rem;color:var(--text-on-dark-dim);margin-bottom:12px;line-height:1.7}
.hero-trust{font-size:0.82rem;color:rgba(232,245,233,0.5);margin-bottom:32px;display:flex;align-items:center;gap:6px}
.hero-trust::before{content:'🔒';font-size:0.9rem}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap}

/* Particles */
.particles{position:absolute;inset:0;pointer-events:none;z-index:1}
.particle{position:absolute;border-radius:50%;animation:float-up linear infinite}
.particle.leaf{width:8px;height:14px;background:rgba(126,179,86,0.3);border-radius:50% 50% 50% 0;transform:rotate(-30deg)}
.particle.firefly{width:4px;height:4px;background:var(--tea-bright);box-shadow:0 0 8px 3px rgba(126,179,86,0.5);animation-name:float-up-glow}
@keyframes float-up{0%{transform:translateY(0) rotate(0deg);opacity:0}10%{opacity:1}90%{opacity:0.6}100%{transform:translateY(-100vh) rotate(360deg);opacity:0}}
@keyframes float-up-glow{0%{transform:translateY(0) scale(1);opacity:0}15%{opacity:1}50%{opacity:0.8;transform:translateY(-50vh) scale(1.5)}100%{transform:translateY(-100vh) scale(0.3);opacity:0}}

/* Trust Strip */
.trust-strip{background:linear-gradient(135deg,var(--tea-deep),#0d2a15);padding:32px 0}
.trust-strip .container{display:flex;justify-content:center;gap:60px;flex-wrap:wrap}
.trust-item{text-align:center;color:#fff}
.trust-item .num{font-size:1.8rem;font-weight:800;background:linear-gradient(135deg,var(--tea-bright),var(--gold-light));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.trust-item .label{font-size:0.8rem;color:var(--text-on-dark-dim);margin-top:2px}

/* Sections */
.section{padding:80px 0}
.section.alt{background:var(--bg-section)}

/* Feature Cards */
.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:28px}
.feature-card{background:#fff;border-radius:var(--radius-lg);padding:36px 28px;box-shadow:var(--shadow-card);border:1px solid rgba(26,92,58,0.06);transition:all 0.3s var(--ease-out);position:relative;overflow:hidden}
.feature-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--tea-bright),var(--tea-light),var(--teal));transform:scaleX(0);transition:transform 0.4s var(--ease-out)}
.feature-card:hover::before{transform:scaleX(1)}
.feature-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg),var(--shadow-frost)}
.feature-card .icon{font-size:2.5rem;margin-bottom:16px;display:block}
.feature-card h3{font-size:1.2rem;margin-bottom:10px;color:var(--tea-deep)}
.feature-card p{font-size:0.92rem;color:var(--text-secondary);line-height:1.7}

/* Product Showcase */
.products-showcase{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:24px}
.product-card{background:#fff;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-card);border:1px solid rgba(26,92,58,0.06);transition:all 0.3s var(--ease-out);display:flex;flex-direction:column}
.product-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.product-img{height:200px;display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden}
.product-card .tea-grade{position:absolute;top:14px;left:14px;background:rgba(255,255,255,0.9);backdrop-filter:blur(4px);padding:4px 12px;border-radius:20px;font-size:0.7rem;font-weight:600;color:var(--tea-deep)}
.product-info{padding:20px;flex:1;display:flex;flex-direction:column}
.product-info h4{font-size:1.05rem;color:var(--tea-deep);margin-bottom:6px}
.product-info .desc{font-size:0.82rem;color:var(--text-muted);margin-bottom:12px;flex:1}
.product-info .price{font-size:1.25rem;font-weight:700;color:var(--gold);margin-bottom:12px}
.product-info .price span{font-size:0.7rem;font-weight:400;color:var(--text-muted)}

/* Steps */
.steps-flow{display:flex;justify-content:center;gap:40px;flex-wrap:wrap}
.step-item{text-align:center;flex:0 0 220px}
.step-number{width:56px;height:56px;border-radius:50%;background:linear-gradient(135deg,var(--tea-bright),var(--tea-mid));color:#fff;font-size:1.5rem;font-weight:800;display:flex;align-items:center;justify-content:center;margin:0 auto 16px;box-shadow:0 4px 16px rgba(126,179,86,0.3)}
.step-item h4{font-size:1.05rem;margin-bottom:6px;color:var(--tea-deep)}
.step-item p{font-size:0.85rem;color:var(--text-muted);line-height:1.6}

/* Science Block */
.science-block{max-width:800px;margin:0 auto}
.science-block .highlight-box{background:#fff;border-radius:var(--radius-lg);padding:40px;box-shadow:var(--shadow-md);border-left:4px solid var(--tea-bright);position:relative}
.science-block .highlight-box::after{content:'';position:absolute;top:20px;right:20px;width:80px;height:80px;background:radial-gradient(circle,rgba(232,245,233,0.8) 0%,transparent 70%);border-radius:50%;pointer-events:none}
.science-block h2{font-size:1.6rem;margin-bottom:16px;color:var(--tea-deep)}
.science-block p{color:var(--text-secondary);margin-bottom:12px;line-height:1.8}
.science-block .key-point{display:inline-flex;align-items:center;gap:8px;background:var(--tea-pale);color:var(--tea-deep);padding:8px 18px;border-radius:20px;font-weight:600;font-size:0.9rem;margin-top:8px}

/* Page Header */
.page-header{padding:140px 0 60px;background:linear-gradient(170deg,#071a0e 0%,#0d2a15 50%,#163d22 100%);text-align:center;position:relative;overflow:hidden}
.page-header::before{content:'';position:absolute;inset:0;background:radial-gradient(ellipse 60% 40% at 50% 50%,rgba(126,179,86,0.08) 0%,transparent 70%);pointer-events:none}
.page-header h1{font-size:clamp(1.8rem,4vw,2.8rem);color:#fff;margin-bottom:12px}
.page-header .subtitle{color:var(--text-on-dark-dim);font-size:1.05rem;max-width:600px;margin:0 auto}

/* Notice Box */
.notice-box{background:linear-gradient(135deg,#f0f8f0,#e8f5e9);border:1px solid var(--tea-pale);border-radius:var(--radius-md);padding:20px 24px;margin:0 auto 40px;max-width:800px;font-size:0.9rem;color:var(--tea-deep);display:flex;align-items:flex-start;gap:12px}
.notice-box .icon{font-size:1.3rem;flex-shrink:0}

/* Product Tabs */
.product-tabs{display:flex;justify-content:center;flex-wrap:wrap;gap:8px;margin-bottom:40px}
.product-tabs button{padding:10px 22px;border-radius:22px;font-size:0.88rem;font-weight:500;color:var(--text-secondary);background:#fff;border:1px solid rgba(26,92,58,0.1);transition:all 0.25s}
.product-tabs button:hover,.product-tabs button.active{background:var(--tea-bright);color:#fff;border-color:var(--tea-bright);box-shadow:0 2px 10px rgba(126,179,86,0.3)}

/* Product Detail */
.product-detail{background:#fff;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-card);border:1px solid rgba(26,92,58,0.06);margin-bottom:32px;display:grid;grid-template-columns:250px 1fr}
.product-detail .pd-img{display:flex;align-items:center;justify-content:center;font-size:5rem;min-height:250px}
.product-detail .pd-info{padding:28px;display:flex;flex-direction:column}
.product-detail .pd-info h3{font-size:1.3rem;color:var(--tea-deep);margin-bottom:6px}
.product-detail .pd-tag{display:inline-block;background:var(--tea-pale);color:var(--tea-mid);padding:3px 12px;border-radius:10px;font-size:0.75rem;font-weight:600;margin-bottom:10px}
.product-detail .pd-desc{color:var(--text-secondary);font-size:0.9rem;margin-bottom:10px;line-height:1.7}
.product-detail .pd-features{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px}
.product-detail .pd-features span{background:rgba(126,179,86,0.06);padding:4px 12px;border-radius:12px;font-size:0.78rem;color:var(--tea-mid)}
.product-detail .pd-bottom{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;margin-top:auto}
.product-detail .pd-price{font-size:1.3rem;font-weight:700;color:var(--gold)}
.product-detail .pd-specs{font-size:0.78rem;color:var(--text-muted)}

/* FAQ */
.faq-list{max-width:760px;margin:40px auto 0}
.faq-item{background:#fff;border-radius:var(--radius-md);margin-bottom:12px;box-shadow:var(--shadow-sm);border:1px solid rgba(26,92,58,0.05);overflow:hidden}
.faq-q{padding:18px 24px;font-weight:600;cursor:pointer;display:flex;align-items:center;justify-content:space-between;color:var(--tea-deep);transition:background 0.2s}
.faq-q:hover{background:rgba(126,179,86,0.03)}
.faq-q::after{content:'+';font-size:1.2rem;color:var(--tea-mid);flex-shrink:0;transition:transform 0.3s}
.faq-item.open .faq-q::after{content:'\2212';transform:rotate(180deg)}
.faq-a{padding:0 24px 18px;font-size:0.9rem;color:var(--text-secondary);line-height:1.7;display:none}
.faq-item.open .faq-a{display:block}

/* About */
.about-story{max-width:800px;margin:0 auto}
.about-story .story-section{margin-bottom:48px}
.about-story .story-section h2{font-size:1.5rem;color:var(--tea-deep);margin-bottom:16px;display:flex;align-items:center;gap:10px}
.about-story .story-section p{color:var(--text-secondary);line-height:1.8;margin-bottom:10px}
.about-values{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px;margin-top:32px}
.about-value{background:#fff;border-radius:var(--radius-md);padding:28px 20px;text-align:center;box-shadow:var(--shadow-sm);border:1px solid rgba(26,92,58,0.05)}
.about-value .icon{font-size:2rem;margin-bottom:10px}
.about-value h4{font-size:1rem;color:var(--tea-deep);margin-bottom:6px}
.about-value p{font-size:0.85rem;color:var(--text-muted)}

/* Contact */
.contact-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:24px;max-width:900px;margin:0 auto}
.contact-card{background:#fff;border-radius:var(--radius-lg);padding:32px 24px;text-align:center;box-shadow:var(--shadow-card);border:1px solid rgba(26,92,58,0.06)}
.contact-card .icon{font-size:2.2rem;margin-bottom:12px}
.contact-card h3{font-size:1.1rem;color:var(--tea-deep);margin-bottom:8px}
.contact-card p{font-size:0.88rem;color:var(--text-muted);line-height:1.6}
.contact-card .qr-img{width:160px;height:160px;margin:12px auto;border-radius:var(--radius-sm);border:1px solid rgba(26,92,58,0.08);object-fit:contain}
.contact-card .qr-caption{font-size:0.78rem;color:var(--text-muted)}

/* CTA Banner */
.cta-banner{background:linear-gradient(135deg,var(--tea-deep),#0d2a15);padding:48px 0;text-align:center}
.cta-banner h2{color:#fff;font-size:1.6rem;margin-bottom:8px}
.cta-banner p{color:var(--text-on-dark-dim);margin-bottom:24px}
.cta-banner .btn{margin:0 8px}

/* Bottom guide */
.bottom-guide{max-width:600px;margin:0 auto;text-align:center}
.bottom-guide p{color:var(--text-muted);margin-bottom:20px;font-size:0.95rem}

/* Footer */
.footer{background:var(--bg-deep);color:rgba(232,245,233,0.7);padding:56px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:40px;margin-bottom:40px}
.footer-col h4{color:#fff;font-size:1.05rem;margin-bottom:16px}
.footer-col p,.footer-col a{font-size:0.88rem;color:rgba(232,245,233,0.55);line-height:2;transition:color 0.2s}
.footer-col a:hover{color:var(--tea-bright)}
.footer-col .domain{color:var(--tea-bright);font-weight:600}
.footer-bottom{border-top:1px solid rgba(255,255,255,0.06);padding-top:24px;text-align:center;font-size:0.8rem;color:rgba(232,245,233,0.35)}

/* Floating WX */
.float-wx{position:fixed;right:20px;bottom:120px;z-index:999;display:flex;flex-direction:column;align-items:center}
.float-wx .wx-trigger{width:52px;height:52px;border-radius:50%;background:linear-gradient(135deg,#07c160,#06ad56);color:#fff;display:flex;align-items:center;justify-content:center;font-size:1.4rem;box-shadow:0 4px 20px rgba(7,193,96,0.35);cursor:pointer;transition:all 0.3s var(--ease-out);position:relative}
.float-wx .wx-trigger:hover{transform:scale(1.08);box-shadow:0 6px 28px rgba(7,193,96,0.45)}
.float-wx .wx-trigger::after{content:'小程序';position:absolute;right:60px;background:rgba(0,0,0,0.8);color:#fff;padding:4px 10px;border-radius:6px;font-size:0.7rem;white-space:nowrap;opacity:0;transform:translateX(8px);transition:all 0.3s var(--ease-out);pointer-events:none}
.float-wx .wx-trigger:hover::after{opacity:1;transform:translateX(0)}
.float-wx .wx-popup{display:none;position:absolute;right:64px;bottom:0;background:#fff;border-radius:var(--radius-lg);padding:24px;box-shadow:0 8px 40px rgba(0,0,0,0.2);text-align:center;width:240px}
.float-wx .wx-popup.show{display:block}
.float-wx .wx-popup img{width:180px;height:180px;margin:0 auto 12px;border-radius:var(--radius-sm)}
.float-wx .wx-popup h4{font-size:0.95rem;color:var(--tea-deep);margin-bottom:4px}
.float-wx .wx-popup p{font-size:0.78rem;color:var(--text-muted);line-height:1.5}
.float-wx .wx-popup .close-btn{position:absolute;top:10px;right:12px;font-size:1.2rem;color:var(--text-muted);cursor:pointer;width:24px;height:24px;display:flex;align-items:center;justify-content:center;border-radius:50%;transition:all 0.2s}
.float-wx .wx-popup .close-btn:hover{background:rgba(0,0,0,0.05)}

/* Popup backdrop */
.popup-backdrop{display:none;position:fixed;inset:0;background:rgba(0,0,0,0.5);z-index:998}

/* Footer wx-guide-bar */
.wx-guide-bar{background:linear-gradient(135deg,var(--tea-pale),#e0f0d8);padding:14px 0;text-align:center}
.wx-guide-bar p{font-size:0.9rem;color:var(--tea-deep);display:flex;align-items:center;justify-content:center;gap:8px;flex-wrap:wrap}
.wx-guide-bar .wx-name{font-weight:700;color:var(--tea-mid)}

/* Section bottom link */
.section-bottom-link{text-align:center;margin-top:32px}
.section-bottom-link a{color:var(--tea-mid);font-weight:600;font-size:0.95rem;transition:color 0.2s}
.section-bottom-link a:hover{color:var(--tea-bright)}

/* Responsive */
@media(max-width:900px){
  .product-detail{grid-template-columns:1fr}
  .product-detail .pd-img{min-height:180px;font-size:4rem}
  .footer-grid{grid-template-columns:1fr;gap:28px}
}
@media(max-width:768px){
  /* Hamburger menu */
  .mobile-menu-toggle{display:flex}
  .nav-links{display:none;position:absolute;top:var(--nav-height);left:0;right:0;background:rgba(255,255,255,0.97);backdrop-filter:blur(16px);flex-direction:column;padding:16px 0;border-bottom:1px solid rgba(26,92,58,0.08);box-shadow:0 8px 24px rgba(0,0,0,0.08)}
  .nav-links.open{display:flex}
  .nav-links a{padding:14px 24px;border-radius:0;font-size:1rem}
  .nav-wx-btn{margin:8px 24px;justify-content:center}
  .mobile-menu-toggle.active span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}
  .mobile-menu-toggle.active span:nth-child(2){opacity:0}
  .mobile-menu-toggle.active span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}
  /* Hero */
  .hero{padding:140px 0 80px;text-align:center}
  .hero-content{max-width:100%}
  .hero h1{font-size:clamp(1.8rem,8vw,2.4rem)}
  .hero-subtitle{font-size:0.95rem}
  .hero-trust{font-size:0.75rem;justify-content:center;flex-wrap:wrap}
  .hero-actions{justify-content:center;flex-direction:column;align-items:center}
  .hero-actions .btn{width:100%;max-width:280px;justify-content:center}
  /* Trust strip */
  .trust-strip .container{gap:20px}
  .trust-item .num{font-size:1.4rem}
  .trust-item .label{font-size:0.7rem}
  /* Sections */
  .section{padding:48px 0}
  .section-subtitle{font-size:0.9rem;margin-bottom:2rem}
  .container{padding:0 16px}
  /* Steps */
  .steps-flow{gap:16px}
  .step-item{flex:1 1 100px;max-width:120px}
  .step-number{width:44px;height:44px;font-size:1.2rem;margin-bottom:10px}
  .step-item h4{font-size:0.9rem}
  .step-item p{font-size:0.75rem}
  /* Product tabs */
  .product-tabs{gap:6px}
  .product-tabs button{padding:8px 14px;font-size:0.78rem}
  /* Product detail */
  .product-detail .pd-bottom{flex-direction:column;align-items:flex-start}
  .product-detail .pd-bottom .btn{width:100%;justify-content:center}
  /* Notice box */
  .notice-box{padding:16px;font-size:0.82rem;margin:0 0 28px}
  /* Features */
  .features-grid{grid-template-columns:1fr;gap:16px}
  .feature-card{padding:24px 20px}
  /* Products showcase */
  .products-showcase{grid-template-columns:1fr 1fr;gap:16px}
  /* Page header */
  .page-header{padding:120px 0 40px}
  .page-header h1{font-size:1.6rem}
  .page-header .subtitle{font-size:0.9rem}
  /* Contact */
  .contact-grid{grid-template-columns:1fr;gap:16px}
  .contact-card{padding:24px 16px}
  .contact-card .qr-img{width:140px;height:140px}
  /* FAQ */
  .faq-q{padding:14px 16px;font-size:0.9rem}
  .faq-a{font-size:0.82rem;padding:0 16px 14px}
  /* Science */
  .science-block .highlight-box{padding:24px 20px}
  .science-block h2{font-size:1.3rem}
  .science-block p{font-size:0.88rem}
  /* About */
  .about-story .story-section{margin-bottom:32px}
  .about-story .story-section h2{font-size:1.2rem}
  .about-story .story-section p{font-size:0.88rem}
  .about-values{gap:12px}
  .about-value{padding:20px 16px}
  /* Footer */
  .footer{padding:40px 0 20px}
  .footer-grid{gap:24px}
  /* Float WX */
  .float-wx{right:10px;bottom:70px}
  .float-wx .wx-trigger{width:44px;height:44px;font-size:1.2rem}
  .float-wx .wx-popup{right:52px;width:220px;padding:18px}
  .float-wx .wx-popup img{width:150px;height:150px}
  /* Guide bar */
  .wx-guide-inner{gap:4px;font-size:0.78rem;padding:0 8px}
  .wx-guide-action{font-size:0.72rem}
  /* CTA */
  .cta-banner{padding:36px 0}
  .cta-banner h2{font-size:1.3rem}
  .cta-banner .btn{display:block;width:100%;max-width:280px;margin:0 auto 8px;justify-content:center}
}
@media(max-width:480px){
  .products-showcase{grid-template-columns:1fr}
  .hero h1{font-size:clamp(1.5rem,7vw,1.8rem)}
  .section-title{font-size:1.5rem}
  .trust-strip .container{gap:12px;flex-wrap:wrap}
  .trust-item{flex:1 1 calc(50% - 12px)}
  .trust-item .num{font-size:1.2rem}
  .hero{padding:120px 0 60px}
  .hero-subtitle{font-size:0.85rem}
  .features-grid{gap:12px}
  .feature-card{padding:20px 16px}
  .product-tabs button{padding:7px 10px;font-size:0.72rem;border-radius:16px}
  .step-item{max-width:none;flex:1 1 45%}
  .page-header h1{font-size:1.4rem}
  .product-detail .pd-img{min-height:140px;font-size:3.5rem}
  .product-detail .pd-info{padding:16px}
  .product-detail .pd-info h3{font-size:1.1rem}
  .about-value{padding:16px 14px}
  .about-value .icon{font-size:1.6rem}
  .about-value h4{font-size:0.9rem}
  .about-value p{font-size:0.78rem}
  .wx-guide-inner{font-size:0.72rem}
  .wx-guide-name{font-size:0.72rem}
  .footer-bottom{font-size:0.7rem}
}

/* ---------- Optimized wx-guide-bar (clickable, no QR, elegant) ---------- */
.wx-guide-bar {
  background: linear-gradient(135deg, #f0fcf0, #e8f5e9);
  border-top: 1px solid rgba(126,179,86,0.12);
  padding: 12px 0;
  cursor: pointer;
  transition: background 0.3s;
}
.wx-guide-bar:hover {
  background: linear-gradient(135deg, #e5f8e5, #dcf0dc);
}
.wx-guide-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  max-width: 720px;
  margin: 0 auto;
  font-size: 0.88rem;
  flex-wrap: wrap;
}
.wx-guide-icon {
  font-size: 1.1rem;
}
.wx-guide-text {
  color: var(--text-secondary);
}
.wx-guide-name {
  font-weight: 700;
  color: var(--tea-mid);
}
.wx-guide-action {
  color: var(--tea-bright);
  font-weight: 600;
  font-size: 0.82rem;
  transition: transform 0.2s;
  white-space: nowrap;
}
.wx-guide-bar:hover .wx-guide-action {
  transform: translateX(4px);
}