/* ============================================================
   JIAYIGU Diamond Tools 2.0 — 公共样式（多页面版）
   [品牌色] 蓝 #0055B8 / 深蓝 #002A5C / 黄 #FFD100 / 深底 #0B0E13 / 次级底 #131822
   ============================================================ */
:root{
  --bg:#0B0E13; --bg2:#131822; --blue:#0055B8; --blue-dark:#002A5C;
  --blue-light:#0066CC; --yellow:#FFD100; --text:#FFFFFF; --muted:#D1D5DB;
  --gray:#9CA3AF; --gray-dark:#4B5563; --border:rgba(255,255,255,.08);
  --font-display:'Orbitron','Noto Sans SC','PingFang SC','Microsoft YaHei',system-ui,sans-serif;
  --font-body:'Noto Sans SC','PingFang SC','Microsoft YaHei',system-ui,-apple-system,'Segoe UI',Roboto,Arial,sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
html[dir="rtl"] body{direction:rtl}
body{font-family:var(--font-body);background:var(--bg);color:var(--text);overflow-x:hidden;-webkit-font-smoothing:antialiased;line-height:1.6}
h1,h2,h3,h4,h5,h6{font-family:var(--font-display)}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
img{display:block;max-width:100%}
::-webkit-scrollbar{width:6px}
::-webkit-scrollbar-track{background:var(--bg)}
::-webkit-scrollbar-thumb{background:var(--blue);border-radius:3px}

.container{max-width:1280px;margin:0 auto;padding:0 24px}
.section{padding:96px 0}
@media(max-width:768px){.section{padding:64px 0}}

/* ---------- Header ---------- */
.header{position:fixed;top:0;left:0;right:0;z-index:100;height:80px;display:flex;align-items:center;transition:background .3s,border-color .3s,box-shadow .3s;border-bottom:1px solid transparent}
.header.scrolled{background:rgba(19,24,34,.72);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);box-shadow:0 8px 30px rgba(0,0,0,.35);border-bottom-color:var(--border)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;width:100%}
.logo{display:flex;align-items:center;gap:12px;cursor:pointer;text-align:start}
.logo-mark{width:40px;height:40px;border-radius:10px;background:linear-gradient(135deg,var(--blue),var(--blue-dark));display:flex;align-items:center;justify-content:center;font-family:var(--font-display);font-weight:700;font-size:14px;color:#fff;flex-shrink:0}
.logo-name{font-family:var(--font-display);font-weight:700;font-size:18px;letter-spacing:.12em;line-height:1.2;white-space:nowrap}
.logo-tag{font-size:10px;color:#9CA3AF;letter-spacing:.18em;line-height:1.2;text-transform:uppercase;white-space:nowrap}
.nav{display:flex;align-items:center;gap:28px}
.nav-link{position:relative;font-size:14px;color:#D1D5DB;transition:color .2s;padding:4px 0;background:none;border:none;cursor:pointer}
.nav-link:hover{color:#fff}
.nav-link::after{content:'';position:absolute;bottom:-2px;left:0;width:0;height:2px;background:var(--yellow);transition:width .3s}
.nav-link:hover::after{width:100%}
.nav-link.active{color:#fff}
.nav-link.active::after{width:100%}
.header-right{display:flex;align-items:center;gap:16px}
.lang-wrap{position:relative}
.lang-btn{display:flex;align-items:center;gap:6px;font-size:14px;color:#D1D5DB;transition:color .2s;background:none;border:none;cursor:pointer}
.lang-btn:hover{color:#fff}
.lang-code{font-family:var(--font-display);min-width:30px;text-align:center;font-weight:600}
.lang-caret{width:0;height:0;border-left:4px solid transparent;border-right:4px solid transparent;border-top:5px solid currentColor;transition:transform .25s}
.lang-wrap.open .lang-caret{transform:rotate(180deg)}
.lang-dropdown{position:absolute;top:calc(100% + 10px);right:0;width:180px;padding:8px;border-radius:12px;background:rgba(19,24,34,.92);backdrop-filter:blur(12px);border:1px solid var(--border);box-shadow:0 20px 50px rgba(0,0,0,.5);opacity:0;visibility:hidden;transform:translateY(-6px);transition:all .22s;z-index:120}
.lang-wrap.open .lang-dropdown{opacity:1;visibility:visible;transform:translateY(0)}
.lang-opt{display:flex;align-items:center;gap:10px;width:100%;padding:9px 12px;border-radius:8px;font-size:14px;color:#D1D5DB;transition:background .15s,color .15s;text-align:start;background:none;border:none;cursor:pointer}
.lang-opt:hover{background:rgba(255,255,255,.08)}
.lang-opt.active{color:var(--yellow)}
.lang-opt .code{font-family:var(--font-display);font-weight:600;font-size:12px;width:24px;text-align:center}
.cta-btn{display:inline-flex;align-items:center;padding:10px 20px;font-size:13px;font-family:var(--font-display);letter-spacing:.08em;border:1px solid var(--blue);color:var(--blue);border-radius:8px;background:transparent;transition:all .3s;white-space:nowrap}
.cta-btn:hover{background:var(--blue);color:#fff}
.menu-btn{display:none;background:none;border:none;color:#fff;cursor:pointer;padding:4px}
.menu-btn svg{width:26px;height:26px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round}
.mobile-menu{display:none;position:fixed;top:80px;left:0;right:0;background:rgba(19,24,34,.96);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);padding:16px 24px 24px;z-index:99}
.mobile-menu.open{display:block}
.mobile-menu .nav-link{display:block;width:100%;text-align:start;padding:14px 12px;font-size:15px;border-radius:8px}
.mobile-menu .nav-link:hover{background:rgba(255,255,255,.05)}
.mobile-lang-label{font-size:11px;color:#6B7280;letter-spacing:.12em;text-transform:uppercase;padding:14px 12px 8px;border-top:1px solid var(--border);margin-top:8px}
.mobile-lang-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;padding:0 4px}
.mobile-lang-grid button{padding:9px 0;border-radius:8px;font-family:var(--font-display);font-size:13px;color:#9CA3AF;transition:all .2s}
.mobile-lang-grid button:hover{background:rgba(255,255,255,.06)}
.mobile-lang-grid button.active{background:var(--blue);color:#fff}
@media(max-width:1024px){.nav{display:none}.menu-btn{display:block}}

/* ---------- Page banner（内页顶部） ---------- */
.page-banner{position:relative;padding:160px 0 80px;text-align:center;overflow:hidden;background:linear-gradient(180deg,#001233 0%,var(--bg) 100%)}
.page-banner::before{content:'';position:absolute;inset:0;background-image:linear-gradient(rgba(0,85,184,.3) 1px,transparent 1px),linear-gradient(90deg,rgba(0,85,184,.3) 1px,transparent 1px);background-size:80px 80px;opacity:.12}
.page-banner .container{position:relative;z-index:2}
.page-eyebrow{display:inline-block;font-family:var(--font-display);font-size:12px;letter-spacing:.3em;color:var(--yellow);text-transform:uppercase;margin-bottom:16px}
.page-title{font-family:var(--font-display);font-weight:700;font-size:clamp(2rem,4.5vw,3.25rem);color:#fff;text-transform:uppercase;letter-spacing:.04em;margin-bottom:16px}
.page-sub{color:#9CA3AF;font-size:16px;max-width:720px;margin:0 auto}
.breadcrumb{display:flex;justify-content:center;align-items:center;gap:8px;margin-top:20px;font-size:13px;color:#6B7280}
.breadcrumb a{color:var(--blue);transition:color .2s}
.breadcrumb a:hover{color:var(--yellow)}
.breadcrumb .sep{color:#4B5563}

/* ---------- Hero（首页） ---------- */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;justify-content:center;overflow:hidden;text-align:center}
.hero-bg{position:absolute;inset:0;z-index:0;will-change:transform}
.hero-bg img{width:100%;height:100%;object-fit:cover}
.hero-overlay{position:absolute;inset:0;z-index:1;background:linear-gradient(180deg,rgba(11,14,19,.35) 0%,rgba(11,14,19,.62) 55%,rgba(11,14,19,.97) 100%)}
.hero-grid{position:absolute;inset:0;z-index:2;opacity:.12;background-image:linear-gradient(rgba(0,85,184,.35) 1px,transparent 1px),linear-gradient(90deg,rgba(0,85,184,.35) 1px,transparent 1px);background-size:80px 80px;pointer-events:none}
.hero-content{position:relative;z-index:10;max-width:1000px;padding:120px 24px 80px}
.hero-badge{display:inline-flex;align-items:center;gap:10px;padding:8px 18px;border-radius:10px;background:rgba(255,209,0,.15);border:1px solid rgba(255,209,0,.3);backdrop-filter:blur(8px);margin-bottom:32px;opacity:0;animation:fadeUp .6s .3s forwards}
.hero-badge .dot{width:8px;height:8px;border-radius:50%;background:var(--yellow);animation:pulse 1.6s infinite}
.hero-badge span{font-family:var(--font-display);font-size:12px;letter-spacing:.24em;color:var(--yellow);text-transform:uppercase}
.hero-title{font-family:var(--font-display);font-weight:700;letter-spacing:.06em;line-height:1.15;text-transform:uppercase}
.hero-title .line1{display:block;font-size:clamp(2rem,5.5vw,4.25rem);color:#fff;opacity:0;animation:slideInLeft .8s .5s cubic-bezier(.22,.61,.36,1) forwards}
.hero-title .line2{display:block;font-size:clamp(2rem,5.5vw,4.25rem);margin-top:2px;background:linear-gradient(135deg,#fff 0%,var(--yellow) 100%);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;opacity:0;animation:slideInRight .8s .65s cubic-bezier(.22,.61,.36,1) forwards}
.hero-sub{font-size:clamp(1rem,1.6vw,1.25rem);color:#D1D5DB;margin:28px 0 40px;opacity:0;animation:fadeUp .6s .9s forwards}
.typing-cursor::after{content:'|';color:var(--yellow);animation:blink 1s step-end infinite;margin-left:2px}
.hero-ctas{display:flex;flex-wrap:wrap;justify-content:center;gap:16px;opacity:0;animation:fadeUp .6s 1.05s forwards}
.btn-primary{display:inline-flex;align-items:center;gap:8px;padding:15px 32px;background:var(--blue);color:#fff;border-radius:10px;font-family:var(--font-display);font-size:14px;letter-spacing:.08em;box-shadow:0 10px 30px rgba(0,85,184,.35);transition:background .3s,transform .2s}
.btn-primary:hover{background:var(--blue-light);transform:translateY(-1px)}
.btn-primary svg{width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:2;transition:transform .3s}
.btn-primary:hover svg{transform:translateX(3px)}
.btn-ghost{display:inline-flex;align-items:center;gap:8px;padding:15px 32px;border:1px solid rgba(255,255,255,.25);color:#fff;border-radius:10px;font-family:var(--font-display);font-size:14px;letter-spacing:.08em;transition:all .3s}
.btn-ghost:hover{border-color:var(--yellow);color:var(--yellow)}
.hero-scroll{position:absolute;bottom:32px;left:50%;z-index:10;display:flex;flex-direction:column;align-items:center;gap:8px;cursor:pointer;opacity:0;animation:fadeUp .5s 1.3s forwards}
.hero-scroll span{font-family:var(--font-display);font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:#6B7280}
.hero-scroll svg{width:20px;height:20px;stroke:var(--yellow);fill:none;stroke-width:2;animation:bounce 1.8s infinite}
@keyframes fadeUp{from{opacity:0;transform:translateY(24px)}to{opacity:1;transform:translateY(0)}}
@keyframes slideInLeft{from{opacity:0;transform:translateX(-60px)}to{opacity:1;transform:translateX(0)}}
@keyframes slideInRight{from{opacity:0;transform:translateX(60px)}to{opacity:1;transform:translateX(0)}}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.35}}
@keyframes blink{50%{opacity:0}}
@keyframes bounce{0%,100%{transform:translateY(0)}50%{transform:translateY(8px)}}

/* ---------- Stats ---------- */
.stats{position:relative;padding:72px 0;background:linear-gradient(180deg,var(--bg) 0%,var(--bg2) 50%,var(--bg) 100%)}
.stats::before{content:'';position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,rgba(0,85,184,.5),transparent)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.stat-cell{position:relative;text-align:center;padding:12px 8px}
.stat-cell:not(:last-child)::after{content:'';position:absolute;right:0;top:50%;transform:translateY(-50%);width:1px;height:64px;background:rgba(255,255,255,.08)}
.stat-value{font-family:var(--font-display);font-weight:700;font-size:clamp(2.2rem,4vw,3.5rem);line-height:1.15}
.stat-value .num{color:var(--yellow)}
.stat-value .suffix{color:var(--blue)}
.stat-value .prefix{color:#fff}
.stat-label{font-size:13px;color:#9CA3AF;letter-spacing:.08em;text-transform:uppercase;margin-top:4px}
@media(max-width:1024px){.stats-grid{grid-template-columns:repeat(2,1fr)}.stat-cell:nth-child(2)::after{display:none}}
@media(max-width:560px){.stats{padding:48px 0}.stat-cell::after{display:none!important}}

/* ---------- Section headings ---------- */
.section-head{text-align:center;margin-bottom:64px}
.section-eyebrow{display:inline-block;font-family:var(--font-display);font-size:12px;letter-spacing:.3em;color:var(--blue);text-transform:uppercase;margin-bottom:16px}
.section-title{font-family:var(--font-display);font-weight:700;font-size:clamp(1.75rem,3.4vw,2.75rem);color:#fff;margin-bottom:16px;text-transform:uppercase}
.section-sub{color:#9CA3AF;font-size:16px;max-width:720px;margin:0 auto}

/* ---------- Products ---------- */
.products{background:linear-gradient(180deg,var(--bg) 0%,#001233 30%,#001233 70%,var(--bg) 100%)}
.product-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.product-card{position:relative;overflow:hidden;border-radius:14px;background:var(--bg2);border:1px solid rgba(255,255,255,.06);cursor:pointer;transition:transform .3s,box-shadow .3s;opacity:0;transform:translateY(40px)}
.product-card.reveal{opacity:1;transform:translateY(0);transition:opacity .6s,transform .6s}
.product-card:hover{transform:translateY(-4px);box-shadow:0 20px 50px rgba(0,85,184,.12)}
.product-img{position:relative;height:220px;overflow:hidden}
.product-img img{width:100%;height:100%;object-fit:cover;transition:transform .7s}
.product-card:hover .product-img img{transform:scale(1.1)}
.product-img::after{content:'';position:absolute;inset:0;background:linear-gradient(180deg,transparent 40%,rgba(19,24,34,.95) 100%)}
.product-num{position:absolute;top:16px;left:16px;z-index:2;width:40px;height:40px;border-radius:50%;background:rgba(0,85,184,.85);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;font-family:var(--font-display);font-size:14px;font-weight:700;color:#fff}
.product-arrow{position:absolute;top:16px;right:16px;z-index:2;width:40px;height:40px;border-radius:50%;background:rgba(255,255,255,.1);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .3s}
.product-card:hover .product-arrow{opacity:1}
.product-arrow svg{width:18px;height:18px;stroke:#fff;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.product-body{padding:20px}
.product-name{font-family:var(--font-display);font-size:17px;font-weight:600;color:#fff;margin-bottom:8px;transition:color .3s}
.product-card:hover .product-name{color:var(--yellow)}
.product-desc{font-size:14px;color:#9CA3AF;line-height:1.65;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.product-card::after{content:'';position:absolute;bottom:0;left:0;right:0;height:2px;background:linear-gradient(90deg,var(--blue),var(--yellow),var(--blue));transform:scaleX(0);transform-origin:left;transition:transform .5s}
.product-card:hover::after{transform:scaleX(1)}
@media(max-width:1024px){.product-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.product-grid{grid-template-columns:1fr}}

/* ---------- Advantages (flip cards) ---------- */
.advantages{background:var(--bg)}
.flip-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.flip-card{perspective:1200px;height:300px;cursor:pointer}
.flip-inner{position:relative;width:100%;height:100%;transform-style:preserve-3d;transition:transform .8s cubic-bezier(.4,0,.2,1)}
.flip-card:hover .flip-inner,.flip-card:focus-within .flip-inner{transform:rotateY(180deg)}
.flip-face{position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;border-radius:14px;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:32px}
.flip-front{background:var(--bg2);border:1px solid rgba(255,255,255,.05)}
.flip-back{transform:rotateY(180deg);background:linear-gradient(135deg,var(--blue-dark),var(--blue))}
.flip-icon{width:64px;height:64px;border-radius:50%;background:rgba(0,85,184,.2);display:flex;align-items:center;justify-content:center;margin-bottom:24px}
.flip-icon svg{width:32px;height:32px;stroke:var(--blue);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.flip-num{position:absolute;top:16px;right:24px;font-family:var(--font-display);font-size:48px;font-weight:700;color:rgba(255,255,255,.09)}
.flip-title{font-family:var(--font-display);font-size:20px;font-weight:700;letter-spacing:.06em;color:#fff}
.flip-line{width:48px;height:2px;background:var(--yellow);margin-top:16px}
.flip-back .flip-num{color:rgba(255,255,255,.12)}
.flip-back .flip-title{color:var(--yellow);font-size:18px;margin-bottom:16px}
.flip-back p{font-size:14px;color:rgba(255,255,255,.92);line-height:1.7}
@media(max-width:1024px){.flip-grid{grid-template-columns:1fr;max-width:520px;margin:0 auto}}

/* ---------- Applications ---------- */
.applications{background:var(--bg);border-top:1px solid rgba(255,255,255,.06)}
.app-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.app-card{overflow:hidden;border-radius:14px;background:var(--bg2);border:1px solid rgba(255,255,255,.06);cursor:pointer;transition:transform .3s,box-shadow .3s;opacity:0;transform:translateY(40px) scale(.96)}
.app-card.reveal{opacity:1;transform:translateY(0) scale(1);transition:opacity .7s,transform .7s}
.app-card:hover{transform:translateY(-4px);box-shadow:0 20px 50px rgba(0,85,184,.12)}
.app-img{position:relative;height:200px;overflow:hidden}
.app-img img{width:100%;height:100%;object-fit:cover;transition:transform .7s}
.app-card:hover .app-img img{transform:scale(1.08)}
.app-img::after{content:'';position:absolute;inset:0;background:linear-gradient(180deg,transparent 30%,rgba(19,24,34,.6) 75%,var(--bg2) 100%)}
.app-icon{position:absolute;bottom:16px;left:16px;z-index:2;width:48px;height:48px;border-radius:12px;background:rgba(0,85,184,.85);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center}
.app-icon svg{width:24px;height:24px;stroke:#fff;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.app-body{padding:24px}
.app-name{font-family:var(--font-display);font-size:17px;font-weight:600;color:#fff;margin-bottom:10px;transition:color .3s}
.app-card:hover .app-name{color:var(--yellow)}
.app-desc{font-size:14px;color:#9CA3AF;line-height:1.7}
@media(max-width:1024px){.app-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.app-grid{grid-template-columns:1fr}}

/* ---------- Factory ---------- */
.factory{background:var(--bg2)}
.factory-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.factory-img{position:relative;border-radius:16px;overflow:hidden;cursor:pointer;opacity:0;transform:translateX(-40px)}
.factory-img.reveal{opacity:1;transform:translateX(0);transition:opacity .8s,transform .8s}
.factory-img img{width:100%;height:420px;object-fit:cover;transition:transform .7s}
.factory-img:hover img{transform:scale(1.04)}
.factory-img::after{content:'';position:absolute;inset:0;background:linear-gradient(90deg,rgba(19,24,34,.55),transparent)}
.factory-float{position:absolute;bottom:24px;left:24px;z-index:2;padding:16px 22px;border-radius:12px;background:rgba(0,85,184,.92);backdrop-filter:blur(8px);font-family:var(--font-display)}
.factory-float .big{font-size:26px;font-weight:700;color:#fff}
.factory-float .unit{font-size:14px;color:rgba(255,255,255,.85);margin-left:4px}
.factory-body{opacity:0;transform:translateX(40px)}
.factory-body.reveal{opacity:1;transform:translateX(0);transition:opacity .7s,transform .7s}
.factory-body h2{font-family:var(--font-display);font-size:clamp(1.6rem,2.8vw,2.25rem);font-weight:700;color:#fff;line-height:1.3;margin-bottom:24px}
.factory-points{list-style:none;margin-bottom:32px;display:grid;gap:16px}
.factory-points li{display:flex;align-items:flex-start;gap:12px;font-size:15px;color:#D1D5DB}
.factory-points svg{width:20px;height:20px;stroke:var(--yellow);fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0;margin-top:3px}
@media(max-width:1024px){.factory-grid{grid-template-columns:1fr;gap:40px}.factory-img img{height:320px}}

/* ---------- Inquiry / Contact ---------- */
.inquiry{background:var(--bg);border-top:1px solid rgba(255,255,255,.06)}
.inquiry .section-eyebrow{color:var(--yellow)}
.inquiry-title{font-family:var(--font-display);font-weight:700;font-size:clamp(1.75rem,3.4vw,2.75rem);margin-bottom:16px;background:linear-gradient(135deg,var(--yellow),#fff);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.inquiry-grid{display:grid;grid-template-columns:3fr 2fr;gap:40px;align-items:start}
.form-card{background:var(--bg2);border:1px solid rgba(255,255,255,.06);border-radius:14px;padding:32px;opacity:0;transform:translateY(40px)}
.form-card.reveal{opacity:1;transform:translateY(0);transition:opacity .7s,transform .7s}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.form-group{margin-bottom:20px}
.form-group label{display:block;font-size:14px;color:#9CA3AF;margin-bottom:8px}
.form-group input,.form-group textarea{width:100%;padding:13px 16px;border-radius:10px;background:var(--bg);border:1px solid rgba(255,255,255,.1);color:#fff;font-family:var(--font-body);font-size:14px;transition:border-color .25s;outline:none}
.form-group input::placeholder,.form-group textarea::placeholder{color:#4B5563}
.form-group input:focus,.form-group textarea:focus{border-color:var(--blue)}
.form-group textarea{resize:vertical;min-height:120px}
.form-submit{width:100%;display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:15px;background:var(--blue);color:#fff;border-radius:10px;font-family:var(--font-display);font-size:14px;letter-spacing:.08em;transition:background .3s;border:none;cursor:pointer}
.form-submit:hover{background:var(--blue-light)}
.form-submit:disabled{opacity:.6;cursor:not-allowed}
.form-submit svg{width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.spinner{width:18px;height:18px;border:2px solid rgba(255,255,255,.3);border-top-color:#fff;border-radius:50%;animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.form-success{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:64px 24px}
.form-success svg{width:64px;height:64px;stroke:#22C55E;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;margin-bottom:16px}
.form-success h3{font-family:var(--font-display);font-size:20px;color:#fff}
.contact-stack{display:grid;gap:20px}
.contact-card{background:var(--bg2);border:1px solid rgba(255,255,255,.06);border-radius:14px;padding:24px;opacity:0;transform:translateX(24px)}
.contact-card.reveal{opacity:1;transform:translateX(0);transition:opacity .6s,transform .6s}
.contact-card h3{font-family:var(--font-display);font-size:16px;color:#fff;margin-bottom:20px}
.contact-item{display:flex;align-items:flex-start;gap:12px;margin-bottom:16px}
.contact-item:last-child{margin-bottom:0}
.contact-item svg{width:20px;height:20px;stroke:var(--blue);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0;margin-top:2px}
.contact-item .label{font-size:11px;color:#6B7280;letter-spacing:.1em;text-transform:uppercase;margin-bottom:2px}
.contact-item .value{font-size:14px;color:#D1D5DB;word-break:break-word}
.contact-item a.value:hover{color:var(--yellow)}
.wa-card{display:flex;align-items:center;gap:14px;padding:20px 24px;border-radius:14px;background:rgba(22,163,74,.14);border:1px solid rgba(34,197,94,.3);transition:background .3s;opacity:0;transform:translateX(24px)}
.wa-card.reveal{opacity:1;transform:translateX(0);transition:opacity .6s .15s,transform .6s .15s}
.wa-card:hover{background:rgba(22,163,74,.24)}
.wa-icon{width:44px;height:44px;border-radius:50%;background:#25D366;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.wa-icon svg{width:22px;height:22px;fill:#fff}
.wa-text .t1{font-size:14px;font-weight:600;color:#fff}
.wa-text .t2{font-size:12px;color:#9CA3AF}
@media(max-width:1024px){.inquiry-grid{grid-template-columns:1fr}.form-row{grid-template-columns:1fr}}
@media(max-width:640px){.form-card{padding:24px}}

/* ---------- Footer ---------- */
.footer{background:var(--bg2);padding:64px 0 32px;border-top:1px solid rgba(255,255,255,.06)}
.footer-grid{display:grid;grid-template-columns:1.2fr 1fr 1fr 1fr;gap:40px;margin-bottom:48px}
.footer-brand .logo{margin-bottom:16px}
.footer-brand p{font-size:14px;color:#9CA3AF;line-height:1.7}
.footer h4{font-family:var(--font-display);font-size:13px;letter-spacing:.12em;text-transform:uppercase;color:#fff;margin-bottom:20px}
.footer ul{list-style:none;display:grid;gap:10px}
.footer ul a,.footer ul button{font-size:14px;color:#9CA3AF;transition:color .2s;padding:0;background:none;border:none;cursor:pointer}
.footer ul a:hover,.footer ul button:hover{color:var(--yellow)}
.footer-contact li{display:flex;align-items:flex-start;gap:10px;font-size:14px;color:#9CA3AF}
.footer-contact svg{width:16px;height:16px;stroke:var(--blue);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0;margin-top:3px}
.footer-contact a:hover{color:var(--yellow)}
.footer-wa{display:flex;align-items:center;gap:10px;padding:11px 18px;border-radius:10px;background:rgba(22,163,74,.14);border:1px solid rgba(34,197,94,.3);transition:background .3s;margin-bottom:10px}
.footer-wa:hover{background:rgba(22,163,74,.24)}
.footer-wa svg{width:18px;height:18px;fill:#4ADE80}
.footer-wa span{font-size:14px;color:#4ADE80}
.footer-bottom{border-top:1px solid rgba(255,255,255,.05);padding-top:24px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px}
.footer-bottom p{font-size:12px;color:#6B7280}
@media(max-width:1024px){.footer-grid{grid-template-columns:1fr 1fr}}
@media(max-width:640px){.footer-grid{grid-template-columns:1fr}}

/* ---------- Reveal on scroll ---------- */
.reveal-target{opacity:0;transform:translateY(40px);transition:opacity .7s,transform .7s}
.reveal-target.revealed{opacity:1;transform:translateY(0)}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}.reveal-target,.product-card,.app-card{opacity:1;transform:none}}

/* RTL tweaks */
html[dir="rtl"] .lang-dropdown{right:auto;left:0}
html[dir="rtl"] .stat-cell:not(:last-child)::after{right:auto;left:0}
html[dir="rtl"] .factory-img::after{background:linear-gradient(270deg,rgba(19,24,34,.55),transparent)}
html[dir="rtl"] .hero-title .line1{animation-name:slideInRight}
html[dir="rtl"] .hero-title .line2{animation-name:slideInLeft}

/* ---------- Product Detail��3.0 ������ ---------- */
.detail-layout{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start}
.detail-gallery{position:sticky;top:110px;border-radius:16px;overflow:hidden;background:var(--bg2);border:1px solid var(--border)}
.detail-gallery img{width:100%;height:auto;aspect-ratio:1/1;object-fit:contain;background:#fff}
.detail-gallery .detail-badge{position:absolute;top:16px;left:16px;z-index:2;padding:6px 14px;border-radius:8px;background:rgba(0,85,184,.9);backdrop-filter:blur(4px);font-family:var(--font-display);font-size:12px;letter-spacing:.1em;color:#fff}
.detail-info .detail-name{font-family:var(--font-display);font-weight:700;font-size:clamp(1.5rem,3vw,2.25rem);color:#fff;margin-bottom:12px;text-transform:uppercase}
.detail-info .detail-short{color:#9CA3AF;font-size:15px;line-height:1.7;margin-bottom:24px}
.detail-section-title{display:flex;align-items:center;gap:12px;font-family:var(--font-display);font-size:14px;letter-spacing:.16em;text-transform:uppercase;color:var(--yellow);margin:32px 0 16px}
.detail-section-title::after{content:'';flex:1;height:1px;background:linear-gradient(90deg,rgba(255,209,0,.4),transparent)}
.detail-features{list-style:none;display:grid;gap:12px}
.detail-features li{display:flex;align-items:flex-start;gap:10px;font-size:14px;color:#D1D5DB;line-height:1.6}
.detail-features svg{width:18px;height:18px;stroke:var(--yellow);fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0;margin-top:3px}
.spec-table{width:100%;border-collapse:collapse;border-radius:12px;overflow:hidden;background:var(--bg2);border:1px solid var(--border)}
.spec-table tr{border-bottom:1px solid rgba(255,255,255,.06)}
.spec-table tr:last-child{border-bottom:none}
.spec-table th{font-family:var(--font-display);font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:#9CA3AF;padding:14px 20px;text-align:start;background:rgba(255,255,255,.03);width:38%}
.spec-table td{padding:14px 20px;color:#fff;font-size:14px}
.detail-cta{display:flex;flex-wrap:wrap;gap:16px;margin-top:32px}
.detail-cta .btn-primary,.detail-cta .btn-ghost{flex:1;justify-content:center;min-width:180px}
.related-title{font-family:var(--font-display);font-size:14px;letter-spacing:.16em;text-transform:uppercase;color:var(--yellow);margin-bottom:20px}
.related-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}
.related-item{position:relative;overflow:hidden;border-radius:12px;background:var(--bg2);border:1px solid var(--border);cursor:pointer;transition:transform .3s,box-shadow .3s;opacity:0;transform:translateY(24px)}
.related-item.reveal{opacity:1;transform:translateY(0);transition:opacity .6s,transform .6s}
.related-item:hover{transform:translateY(-4px);box-shadow:0 16px 40px rgba(0,85,184,.15)}
.related-item img{width:100%;height:120px;object-fit:cover}
.related-item .r-name{font-size:12px;color:#fff;padding:12px 12px 14px;font-family:var(--font-display);text-align:center;line-height:1.4}
.related-item:hover .r-name{color:var(--yellow)}
@media(max-width:1024px){.detail-layout{grid-template-columns:1fr;gap:32px}.detail-gallery{position:static}.detail-gallery img{height:360px}.related-grid{grid-template-columns:repeat(3,1fr)}}
@media(max-width:640px){.related-grid{grid-template-columns:repeat(2,1fr)}.detail-gallery img{height:280px}}


/* ---------- v4.0: 型号标签 / footer 按钮 ---------- */
.model-tags{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:12px}
.model-tag{display:inline-block;padding:8px 14px;border-radius:8px;background:rgba(0,85,184,.14);border:1px solid rgba(0,85,184,.35);font-family:var(--font-display);font-size:13px;color:#fff;letter-spacing:.04em}
.model-tag:hover{background:rgba(0,85,184,.28);border-color:var(--blue)}
.detail-note{font-size:12px;color:#6B7280;margin-top:4px}
.footer-catalog{display:flex;align-items:center;gap:10px;padding:11px 18px;border-radius:10px;margin-bottom:10px;transition:background .3s}
.footer-catalog{background:rgba(0,85,184,.14);border:1px solid rgba(0,85,184,.3)}
.footer-catalog:hover{background:rgba(0,85,184,.26)}
.footer-catalog svg{width:18px;height:18px;stroke:#7EB3F5;fill:none}
.footer-catalog span{font-size:14px;color:#7EB3F5}
.wa-catalog-icon{background:var(--blue)}

/* ---------- 悬浮 WhatsApp 按钮 (v67) ---------- */
.float-wa{position:fixed;right:22px;bottom:22px;z-index:999;display:flex;align-items:center;justify-content:center;width:56px;height:56px;border-radius:50%;background:#22C55E;box-shadow:0 6px 20px rgba(34,197,94,.45);transition:transform .25s,box-shadow .25s}
.float-wa:hover{transform:scale(1.08);box-shadow:0 8px 26px rgba(34,197,94,.6)}
.float-wa svg{width:30px;height:30px;fill:#fff}
.float-wa::after{content:'';position:absolute;inset:-4px;border-radius:50%;border:2px solid rgba(34,197,94,.5);animation:waPulse 2s ease-out infinite}
@keyframes waPulse{0%{transform:scale(.9);opacity:1}70%{transform:scale(1.25);opacity:0}100%{transform:scale(1.25);opacity:0}}
@media(max-width:640px){.float-wa{right:16px;bottom:16px;width:50px;height:50px}.float-wa svg{width:26px;height:26px}}