/* components.css · 组件库 */

/* ===== Header ===== */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  transition:all .3s ease;
  background:transparent;
}
.site-header.scrolled{
  background:var(--glass);backdrop-filter:var(--glass-blur);
  box-shadow:var(--shadow-soft);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:80px;transition:height .3s;}
.site-header.scrolled .header-inner{height:64px;}
.logo{display:flex;align-items:center;gap:10px;font-family:var(--font-en);font-weight:800;font-size:20px;color:var(--text-primary);letter-spacing:-0.01em;}
.logo-img{width:36px;height:36px;object-fit:contain;border-radius:9px;}
.logo-mark{width:34px;height:34px;border-radius:10px;background:var(--grad-sky);display:flex;align-items:center;justify-content:center;color:#fff;font-size:16px;font-weight:800;box-shadow:0 4px 14px rgba(37,99,235,0.3);}
.main-nav{display:flex;gap:6px;align-items:center;}
.main-nav a{padding:9px 14px;border-radius:10px;font-size:15px;font-weight:500;color:var(--text-body);transition:all .2s;}
.main-nav a:hover{background:rgba(37,99,235,0.08);color:var(--accent);}
.main-nav a.active{color:var(--accent);font-weight:600;}
.header-actions{display:flex;align-items:center;gap:12px;}
.lang-switch{position:relative;}
.lang-btn{display:flex;align-items:center;gap:7px;padding:8px 14px;border-radius:var(--r-btn);background:var(--glass);backdrop-filter:blur(16px);border:1px solid var(--card-line);font-size:13px;font-weight:600;color:var(--text-primary);}
.lang-menu{position:absolute;right:0;top:calc(100% + 8px);min-width:150px;background:#fff;border-radius:14px;box-shadow:var(--shadow-lift);padding:8px;display:none;border:1px solid var(--line);}
.lang-switch.open .lang-menu{display:block;}
.lang-menu a{display:block;padding:8px 12px;border-radius:9px;font-size:13.5px;color:var(--text-body);}
.lang-menu a:hover{background:var(--bg-mist);color:var(--accent);}
.burger{display:none;flex-direction:column;gap:5px;padding:8px;}
.burger span{width:22px;height:2px;background:var(--text-primary);border-radius:2px;transition:all .3s;}
.mobile-nav{display:none;position:fixed;inset:0;background:var(--bg-pearl);z-index:99;padding:100px 8% 40px;overflow-y:auto;}
.mobile-nav.open{display:block;}
.mobile-nav a{display:block;padding:14px 0;font-size:20px;font-weight:600;color:var(--text-primary);border-bottom:1px solid var(--line);}

/* ===== 按钮 ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:14px 32px;border-radius:var(--r-btn);font-family:var(--font-en);font-size:15px;font-weight:600;letter-spacing:0.01em;transition:all .3s;border:none;}
.btn-primary{background:var(--grad-sky);color:#fff;box-shadow:0 8px 24px rgba(37,99,235,0.28);}
.btn-primary:hover{box-shadow:var(--shadow-glow);transform:translateY(-2px);}
.btn-glass{background:var(--glass);backdrop-filter:blur(20px);color:var(--text-primary);border:1px solid rgba(37,99,235,0.2);}
.btn-glass:hover{border-color:var(--accent);color:var(--accent);}
.btn-outline{position:relative;background:transparent;color:var(--text-primary);padding:15px 33px;}
.btn-outline::before{content:'';position:absolute;inset:0;border-radius:var(--r-btn);padding:1.5px;background:var(--grad-sky);-webkit-mask:linear-gradient(#fff 0 0) content-box,linear-gradient(#fff 0 0);-webkit-mask-composite:xor;mask-composite:exclude;}
.btn-ghost{background:transparent;color:var(--text-body);}
.btn-ghost:hover{color:var(--accent);}
.btn-sm{padding:10px 20px;font-size:13px;}
.btn-lg{padding:18px 40px;font-size:17px;}

/* ===== 卡片 ===== */
.card{border-radius:var(--r-card);padding:28px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-soft);transition:all .35s cubic-bezier(.4,0,.2,1);}
.card:hover{box-shadow:var(--shadow-lift);transform:translateY(-4px);}
.card-glass{background:var(--glass);backdrop-filter:var(--glass-blur);border:1px solid rgba(255,255,255,0.9);}
.card-grad{background:var(--grad-sky);padding:1.5px;border:none;}
.card-grad>.card-inner{background:#fff;border-radius:calc(var(--r-card) - 1.5px);padding:26px;height:100%;}
.card-icon{width:56px;height:56px;border-radius:16px;background:var(--grad-sky);display:flex;align-items:center;justify-content:center;color:#fff;font-family:var(--font-en);font-weight:700;font-size:22px;margin-bottom:20px;box-shadow:0 8px 20px rgba(37,99,235,0.28);}
.card-tag{display:inline-block;font-family:var(--font-mono);font-size:11px;letter-spacing:0.1em;padding:4px 10px;border-radius:6px;background:var(--grad-sky-soft);color:var(--text-primary);font-weight:600;margin-bottom:14px;}
.card h3{font-size:22px;margin-bottom:10px;}
.card p{font-size:14px;color:var(--text-secondary);line-height:1.65;}

/* ===== Hero ===== */
.hero{position:relative;min-height:min(92vh,880px);display:flex;align-items:center;overflow:hidden;padding:130px 0 90px;}
.hero-track{position:absolute;inset:0;display:flex;width:max-content;animation:hero-scroll 60s linear infinite;will-change:transform;}
.hero:hover .hero-track{animation-play-state:paused;}
@keyframes hero-scroll{from{transform:translateX(0);}to{transform:translateX(-50%);}}
.hero-slide{position:relative;flex:0 0 auto;height:100%;aspect-ratio:2752/1137;overflow:hidden;}
.hero-slide img{width:100%;height:100%;object-fit:cover;display:block;}
.hero-slide .cap{position:absolute;left:36px;bottom:30px;z-index:2;font-family:var(--font-mono);font-size:12px;font-weight:600;letter-spacing:0.14em;text-transform:uppercase;color:#fff;background:rgba(11,31,75,0.55);backdrop-filter:blur(10px);padding:7px 16px;border-radius:999px;border:1px solid rgba(255,255,255,0.25);}
.hero-scrim{position:absolute;inset:0;z-index:2;pointer-events:none;background:
  linear-gradient(90deg,rgba(242,247,253,0.97) 0%,rgba(242,247,253,0.82) 34%,rgba(242,247,253,0.30) 58%,transparent 80%),
  linear-gradient(180deg,rgba(242,247,253,0.4) 0%,transparent 22%,transparent 70%,var(--bg-pearl) 100%);}
.hero-content{position:relative;z-index:3;max-width:760px;}
.hero h1{font-size:clamp(34px,4.6vw,58px);margin-bottom:14px;color:var(--text-primary);text-shadow:0 1px 16px rgba(242,247,253,0.9),0 0 2px rgba(255,255,255,0.9);}
.hero .lead{max-width:620px;margin-bottom:34px;text-shadow:0 1px 16px rgba(242,247,253,0.7);}
.hero-sub{font-size:clamp(18px,2.6vw,30px);font-weight:700;letter-spacing:0.03em;color:#0B1F4B;white-space:nowrap;margin:10px 0 26px;text-shadow:0 1px 14px rgba(242,247,253,0.95),0 0 2px rgba(255,255,255,0.85);}
.hero-cta{display:flex;gap:16px;flex-wrap:wrap;}
.hero-pagination{position:absolute;right:5%;bottom:12%;z-index:3;font-family:var(--font-mono);font-size:14px;color:var(--text-primary);background:var(--glass);backdrop-filter:blur(12px);padding:8px 16px;border-radius:var(--r-btn);border:1px solid var(--card-line);}
/* 子页 hero（无大图） */
.page-hero{padding:180px 0 70px;position:relative;}
.page-hero h1{font-size:56px;margin-bottom:16px;}

/* ===== 统计 ===== */
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.stat{text-align:center;padding:28px 12px;}
.stat-num{font-family:var(--font-en);font-size:64px;font-weight:800;letter-spacing:-0.03em;line-height:1;background:var(--grad-sky);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;font-variant-numeric:tabular-nums;margin-bottom:12px;}
.stat-num small{font-size:32px;}
.stat-label{font-size:13px;color:var(--text-secondary);letter-spacing:0.05em;}

/* ===== 图片占位/真实图 ===== */
.img-slot{position:relative;border-radius:var(--r-img);overflow:hidden;background:var(--grad-sky-soft);}
.img-slot img{width:100%;height:100%;object-fit:cover;}
.img-slot .slot-no{position:absolute;left:10px;top:10px;font-family:var(--font-mono);font-size:11px;font-weight:600;color:#fff;background:rgba(11,31,75,0.7);backdrop-filter:blur(6px);padding:3px 9px;border-radius:6px;z-index:2;}
.ratio-169{aspect-ratio:16/9;}
.ratio-43{aspect-ratio:4/3;}
.ratio-11{aspect-ratio:1/1;}
.ratio-219{aspect-ratio:21/9;}

/* ===== 产品卡 ===== */
.product-card{border-radius:var(--r-card);overflow:hidden;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-soft);transition:all .35s;}
.product-card:hover{box-shadow:var(--shadow-lift);transform:translateY(-6px);}
.product-card .img-slot{border-radius:0;}
.product-card:hover .img-slot img{transform:scale(1.04);}
.product-card .img-slot img{transition:transform .5s;}
.product-card .body{padding:22px;}
.product-card .model{font-family:var(--font-mono);font-size:12px;letter-spacing:0.12em;color:var(--accent);font-weight:600;margin-bottom:6px;}
.product-card h3{font-size:20px;margin-bottom:8px;}
.product-card p{font-size:13.5px;color:var(--text-secondary);}

/* ===== 参数大数字（学宇树） ===== */
.spec-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.spec{padding:24px;border-radius:var(--r-card);background:var(--glass);backdrop-filter:var(--glass-blur);border:1px solid rgba(255,255,255,0.9);text-align:center;}
.spec .v{font-family:var(--font-en);font-size:40px;font-weight:800;letter-spacing:-0.02em;background:var(--grad-sky);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;font-variant-numeric:tabular-nums;}
.spec .v small{font-size:18px;}
.spec .k{font-size:12.5px;color:var(--text-secondary);margin-top:8px;}

/* ===== 徽章/标签 ===== */
.badge{display:inline-block;font-family:var(--font-mono);font-size:11px;font-weight:600;letter-spacing:0.08em;padding:4px 12px;border-radius:var(--r-btn);background:var(--grad-sky);color:#fff;}
.chip{display:inline-block;padding:7px 16px;border-radius:var(--r-btn);background:#fff;border:1px solid var(--card-line);font-size:13px;color:var(--text-body);cursor:pointer;transition:all .2s;}
.chip:hover,.chip.active{background:var(--grad-sky);color:#fff;border-color:transparent;}

/* ===== 表单 ===== */
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;}
.form-field{display:flex;flex-direction:column;gap:7px;}
.form-field.full{grid-column:1/-1;}
.form-field label{font-size:13.5px;font-weight:600;color:var(--text-primary);}
.form-field input,.form-field select,.form-field textarea{
  padding:13px 16px;border-radius:12px;border:1px solid var(--card-line);
  background:#fff;font-family:inherit;font-size:14.5px;color:var(--text-primary);
  transition:border .2s, box-shadow .2s;outline:none;
}
.form-field input:focus,.form-field select:focus,.form-field textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(37,99,235,0.12);}
.form-field textarea{min-height:130px;resize:vertical;}
.hp-field{position:absolute;left:-9999px;}

/* ===== 时间轴 ===== */
.timeline{position:relative;padding-left:32px;}
.timeline::before{content:'';position:absolute;left:8px;top:6px;bottom:6px;width:2px;background:var(--grad-sky);opacity:0.4;border-radius:2px;}
.tl-item{position:relative;padding-bottom:36px;}
.tl-item::before{content:'';position:absolute;left:-30px;top:6px;width:12px;height:12px;border-radius:50%;background:var(--grad-sky);box-shadow:0 0 0 4px rgba(37,99,235,0.15);}
.tl-year{font-family:var(--font-mono);font-size:14px;font-weight:600;color:var(--accent);margin-bottom:4px;}
.tl-item h4{font-size:18px;margin-bottom:6px;}
.tl-item p{font-size:14px;color:var(--text-secondary);}

/* ===== 视频卡 ===== */
.video-card{border-radius:var(--r-card);overflow:hidden;position:relative;cursor:pointer;box-shadow:var(--shadow-soft);}
.video-card .play{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;z-index:2;}
.video-card .play span{width:60px;height:60px;border-radius:50%;background:rgba(255,255,255,0.85);backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:center;color:var(--accent);font-size:20px;box-shadow:var(--shadow-lift);transition:transform .3s;}
.video-card:hover .play span{transform:scale(1.1);}
.video-card .dur{position:absolute;right:10px;bottom:10px;z-index:2;font-family:var(--font-mono);font-size:11px;color:#fff;background:rgba(11,31,75,0.7);padding:3px 8px;border-radius:6px;}

/* ===== Logo 墙 ===== */
.logo-wall{display:grid;grid-template-columns:repeat(6,1fr);gap:20px;align-items:center;}
.logo-wall .lg{height:64px;display:flex;align-items:center;justify-content:center;border-radius:12px;background:#fff;border:1px solid var(--line);filter:grayscale(1);opacity:0.6;font-family:var(--font-en);font-weight:700;color:var(--text-secondary);transition:all .3s;}
.logo-wall .lg:hover{filter:none;opacity:1;box-shadow:var(--shadow-soft);}

/* ===== CTA 条 ===== */
.cta-band{border-radius:var(--r-card-lg);background:var(--grad-sky);padding:64px 56px;color:#fff;position:relative;overflow:hidden;box-shadow:var(--shadow-lift);}
.cta-band::before{content:'';position:absolute;top:-40%;right:-10%;width:50%;height:180%;background:radial-gradient(ellipse,rgba(255,255,255,0.22),transparent 60%);filter:blur(30px);}
.cta-band h2{color:#fff;font-size:40px;margin-bottom:12px;position:relative;}
.cta-band p{color:rgba(255,255,255,0.9);margin-bottom:28px;position:relative;}
.cta-band .btn-white{background:#fff;color:var(--accent);position:relative;}

/* ===== Footer ===== */
.site-footer{background:var(--bg-mist);padding:72px 0 32px;position:relative;}
.site-footer::before{content:'';position:absolute;top:0;left:0;right:0;height:1px;background:var(--grad-sky);opacity:0.5;}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.4fr;gap:40px;margin-bottom:48px;}
.footer-col h5{font-family:var(--font-en);font-size:14px;font-weight:700;letter-spacing:0.06em;text-transform:uppercase;color:var(--text-primary);margin-bottom:16px;}
.footer-col a{display:block;padding:5px 0;font-size:14px;color:var(--text-secondary);}
.footer-col a:hover{color:var(--accent);}
.footer-bottom{border-top:1px solid var(--line);padding-top:24px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:var(--text-muted);}

/* ===== 面包屑 ===== */
.breadcrumb{display:flex;gap:8px;align-items:center;font-size:13px;color:var(--text-secondary);margin-bottom:20px;}
.breadcrumb a{color:var(--text-secondary);}
.breadcrumb a:hover{color:var(--accent);}
.breadcrumb .sep{color:var(--text-muted);}

/* ===== 联系浮标 ===== */
.float-contact{position:fixed;right:22px;bottom:22px;z-index:90;display:flex;flex-direction:column;gap:10px;}
.float-contact a{width:48px;height:48px;border-radius:50%;background:#fff;box-shadow:var(--shadow-lift);display:flex;align-items:center;justify-content:center;font-size:18px;color:var(--accent);transition:transform .25s;}
.float-contact a:hover{transform:scale(1.08);}

/* ===== reveal 动效 ===== */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .8s cubic-bezier(.22,1,.36,1),transform .8s cubic-bezier(.22,1,.36,1);}
.reveal.in{opacity:1;transform:none;}

/* ===== 产品详情：核心亮点 ===== */
.hl-list li{position:relative;padding:10px 12px 10px 34px;font-size:14.5px;line-height:1.7;color:var(--text-primary);background:rgba(255,255,255,0.6);border:1px solid var(--line);border-radius:10px;backdrop-filter:blur(6px);}
.hl-list li::before{content:'✓';position:absolute;left:12px;top:9px;width:18px;height:18px;border-radius:50%;background:var(--grad-sky);color:#fff;font-size:11px;font-weight:800;display:flex;align-items:center;justify-content:center;font-family:var(--font-en);}

/* ===== 产品详情：技术参数表 ===== */
.spec-table{width:100%;border-collapse:collapse;font-size:13.5px;}
.spec-table th,.spec-table td{text-align:left;padding:9px 8px;border-bottom:1px solid var(--line);vertical-align:top;line-height:1.55;}
.spec-table th{width:38%;font-weight:600;color:var(--text-secondary);background:rgba(37,99,235,0.03);}
.spec-table td{color:var(--text-primary);font-family:var(--font-en),var(--font-zh);}
.spec-table tr:last-child th,.spec-table tr:last-child td{border-bottom:none;}
.spec-table tr:hover th,.spec-table tr:hover td{background:rgba(37,99,235,0.05);}

/* ===== HTML 站点地图页 ===== */
.sitemap-group{margin-bottom:34px;}
.sitemap-group h3{font-size:16px;color:var(--c-navy);margin-bottom:12px;padding-bottom:8px;border-bottom:2px solid transparent;border-image:var(--grad-sky) 1;border-image-slice:1;}
.sitemap-list{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:6px 18px;}
.sitemap-list a{display:block;padding:5px 0;font-size:13.5px;color:var(--text-secondary);border-bottom:1px dashed transparent;transition:all .2s;}
.sitemap-list a:hover{color:var(--accent);border-bottom-color:var(--accent);padding-left:4px;}

/* ===== 悬浮客服面板 ===== */
.cs-fab{position:fixed;right:22px;bottom:22px;z-index:95;display:flex;flex-direction:column;gap:10px;align-items:flex-end;}
.cs-btn{width:52px;height:52px;border-radius:50%;background:var(--grad-sky);color:#fff;border:none;cursor:pointer;box-shadow:0 8px 24px rgba(37,99,235,0.35);display:flex;align-items:center;justify-content:center;font-size:22px;transition:transform .25s, box-shadow .25s;}
.cs-btn:hover{transform:scale(1.08);box-shadow:0 12px 32px rgba(37,99,235,0.5);}
.cs-panel{position:absolute;right:0;bottom:64px;width:280px;background:#fff;border-radius:16px;box-shadow:0 20px 60px rgba(11,31,75,0.18);padding:18px;opacity:0;transform:translateY(10px) scale(.96);pointer-events:none;transition:opacity .25s, transform .25s;}
.cs-panel.open{opacity:1;transform:none;pointer-events:auto;}
.cs-panel h4{font-size:15px;color:var(--c-navy);margin-bottom:12px;}
.cs-panel .cs-item{display:flex;align-items:center;gap:10px;padding:10px 8px;border-radius:10px;cursor:pointer;transition:background .2s;text-decoration:none;color:var(--text-primary);}
.cs-panel .cs-item:hover{background:rgba(37,99,235,0.06);}
.cs-panel .cs-ico{width:34px;height:34px;border-radius:10px;background:var(--grad-sky-soft);display:flex;align-items:center;justify-content:center;font-size:16px;flex-shrink:0;}
.cs-panel .cs-txt{font-size:13px;line-height:1.4;}
.cs-panel .cs-txt b{display:block;font-size:13.5px;color:var(--c-navy);font-weight:600;}
.cs-panel .cs-txt span{color:var(--text-muted);font-size:12px;}
.cs-panel .cs-qr{margin-top:10px;padding-top:12px;border-top:1px solid var(--line);text-align:center;}
.cs-panel .cs-qr img{width:130px;height:130px;border-radius:10px;}
.cs-panel .cs-qr p{font-size:12px;color:var(--text-muted);margin-top:6px;}
@media (max-width:640px){
  .cs-fab{right:14px;bottom:14px;}
  .cs-panel{width:calc(100vw - 28px);right:-8px;}
}