:root{
  --primary:#e60012;
  --primary-dark:#a3000c;
  --accent:#ff5722;
  --accent-dark:#e64a19;
  --dark:#0e0e10;
  --dark-2:#17171a;
  --text:#1f2d3d;
  --text-2:#5e6d82;
  --bg-gray:#f7f7f8;
  --radius:12px;
  --shadow:0 8px 30px rgba(24,24,28,.10);
  --nav-h:72px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;color:var(--text);line-height:1.7;background:#fff;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
ul{list-style:none}
.container{max-width:1270px;margin:0 auto;padding:0 24px}
.section{padding:88px 0}
.section-title{text-align:center;font-size:32px;font-weight:700;letter-spacing:1px}
.section-title[id]{scroll-margin-top:calc(var(--nav-h) + 20px)}
.section-sub{text-align:center;color:var(--text-2);margin:14px auto 48px;max-width:640px;font-size:15px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:none;cursor:pointer;font-size:15px;font-weight:600;border-radius:6px;padding:13px 34px;transition:all .3s ease;font-family:inherit}
.btn-primary{background:linear-gradient(135deg,#26262b,#0a0a0c);color:#fff;box-shadow:0 6px 18px rgba(0,0,0,.22)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 10px 26px rgba(0,0,0,.32)}
.btn-outline{background:rgba(255,255,255,.12);color:#fff;border:1px solid rgba(255,255,255,.5);backdrop-filter:blur(6px)}
.btn-outline:hover{background:rgba(255,255,255,.22)}

/* ===================== 顶部导航 ===================== */
.site-header{position:fixed;top:0;left:0;right:0;z-index:1000;height:var(--nav-h);transition:all .35s ease}
.site-header .container{height:var(--nav-h);display:flex;align-items:center;justify-content:space-between;gap:20px}
.site-header.scrolled{background:rgba(255,255,255,.96);backdrop-filter:blur(12px);box-shadow:0 4px 24px rgba(0,0,0,.10)}
.site-header.scrolled .main-nav a{color:#33383f}
.site-header.scrolled .main-nav a:hover,.site-header.scrolled .main-nav a.active{color:var(--primary);background:rgba(230,0,18,.06)}
.site-header.scrolled .btn-ghost{color:#33383f;border-color:#d5d8de}
.site-header.scrolled .btn-ghost:hover{background:rgba(230,0,18,.06);color:var(--primary);border-color:var(--primary)}
.site-header.scrolled .hamburger span{background:#33383f}
.site-header.scrolled .logo-light{display:none}
.site-header.scrolled .logo-dark{display:block}
.logo-img{height:40px;width:auto;display:block}
.logo-dark{display:none}
.logo{display:flex;align-items:center;gap:10px;font-size:22px;font-weight:800;color:#fff;flex-shrink:0}
.logo-badge{width:38px;height:38px;border-radius:9px;background:linear-gradient(135deg,var(--primary),#ff7a2f);display:flex;align-items:center;justify-content:center;font-size:20px;color:#fff;box-shadow:0 4px 12px rgba(24,24,28,.5)}
.logo small{font-size:11px;font-weight:400;opacity:.7;letter-spacing:2px;display:block;line-height:1}
.main-nav{display:flex;align-items:center;gap:6px}
.main-nav a{color:rgba(255,255,255,.88);font-size:15px;padding:8px 14px;border-radius:6px;position:relative;transition:all .25s;white-space:nowrap}
/* PC 端主导航文字加粗，下拉子菜单保持常规字重 */
@media (min-width:769px){
  .main-nav a{font-weight:600}
  .main-nav .sub-menu a{font-weight:400}
}
.main-nav a:hover,.main-nav a.active{color:#fff;background:rgba(255,255,255,.12)}

/* ---------- 导航下拉子菜单 ---------- */
.nav-item{position:relative}
.nav-toggle{display:flex;align-items:center;gap:5px}
.nav-arrow{display:flex;transition:transform .25s}
.nav-item:hover .nav-arrow{transform:rotate(180deg)}
.sub-menu{position:absolute;left:50%;top:calc(100% + 14px);min-width:158px;padding:8px;background:rgba(255,255,255,.98);backdrop-filter:blur(10px);border:1px solid rgba(24,24,28,.06);border-radius:10px;box-shadow:0 16px 40px rgba(24,24,28,.16);transform:translateX(-50%) translateY(8px);opacity:0;visibility:hidden;transition:all .28s ease;z-index:10}
.sub-menu::before{content:"";position:absolute;left:0;right:0;top:-16px;height:16px}
.nav-item:hover .sub-menu{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.main-nav .sub-menu a{display:block;padding:9px 14px;border-radius:7px;font-size:14px;color:#33383f;white-space:nowrap;transition:all .22s}
.main-nav .sub-menu a:hover{color:var(--primary);background:rgba(230,0,18,.07)}
.header-actions{display:flex;align-items:center;gap:12px;flex-shrink:0}
.btn-ghost{color:#fff;border:1px solid rgba(255,255,255,.45);background:transparent;padding:9px 20px;border-radius:6px;font-size:14px;font-weight:600;cursor:pointer;transition:all .25s;font-family:inherit;white-space:nowrap}
.btn-ghost:hover{background:rgba(255,255,255,.15)}
.btn-solid{color:#fff;background:linear-gradient(135deg,#2a2a2e,#0c0c0e);border:none;padding:9px 20px;border-radius:6px;font-size:14px;font-weight:600;cursor:pointer;transition:all .25s;box-shadow:0 4px 14px rgba(0,0,0,.28);font-family:inherit;white-space:nowrap}
.btn-solid:hover{transform:translateY(-1px);box-shadow:0 6px 18px rgba(0,0,0,.4)}
/* 注册/登录：红色实心按钮 */
.nav-login{display:inline-flex;align-items:center;justify-content:center;padding:6px;background:var(--primary);color:#fff;border:none;border-radius:3px;font-size:12px;letter-spacing:.5px;cursor:pointer;transition:background .25s,transform .2s;font-family:inherit;white-space:nowrap}
.nav-login:hover{background:#c90010;color:#fff}
.nav-login:active{transform:translateY(1px)}
/* 在线客服：QQ 图标 + 文字，无边框无底色 */
.nav-service{display:inline-flex;align-items:center;gap:7px;height:36px;padding:0 2px;background:none;border:none;color:#fff;font-size:14.5px;cursor:pointer;transition:color .25s,opacity .25s;font-family:inherit;white-space:nowrap}
.nav-service .nav-qq{width:20px;height:20px;flex:none}
.nav-service:hover{opacity:.82}
.site-header.scrolled .nav-service{color:#33383f}
.site-header.scrolled .nav-service:hover{color:var(--primary);opacity:1}
/* 登录后用户入口：头像 + 昵称 + 下拉箭头 */
.nav-user{display:inline-flex;align-items:center;gap:8px;height:36px;padding:0 2px;color:#fff;font-size:14.5px;white-space:nowrap;transition:color .25s}
.nav-user:hover{color:#fff}
.nav-avatar{width:28px;height:28px;border-radius:50%;overflow:hidden;flex:none;background:rgba(255,255,255,.18);display:inline-flex;align-items:center;justify-content:center;color:#fff}
.nav-avatar img{width:100%;height:100%;object-fit:cover;display:block}
.nav-avatar svg{width:16px;height:16px}
.nav-user-ico{display:none;width:20px;height:20px} /* 仅手机端使用的纯图标用户入口 */
.nav-username{max-width:132px;overflow:hidden;text-overflow:ellipsis}
.nav-user .nav-arrow svg{width:15px;height:15px;display:block;margin-top:2px}
.site-header.scrolled .nav-user{color:#33383f}
.site-header.scrolled .nav-user:hover{color:var(--primary)}
.site-header.scrolled .nav-avatar{background:rgba(24,24,28,.08);color:#33383f}
/* 用户下拉面板（白底、方角、带图标与分隔线） */
.header-actions .user-menu .sub-menu{left:0;right:auto;min-width:196px;padding:0;background:#fff;border:1px solid rgba(24,24,28,.07);border-radius:3px;box-shadow:0 14px 34px rgba(24,24,28,.16);transform:translateY(6px)}
.header-actions .user-menu .sub-menu a{display:flex;align-items:center;gap:11px;padding:13px 18px;font-size:14.5px;color:#4e5969;border-bottom:1px solid #f0f2f5;white-space:nowrap;transition:background .2s,color .2s}
.header-actions .user-menu .sub-menu a:last-child{border-bottom:none}
.header-actions .user-menu .sub-menu a:hover{background:#f7f8fa;color:var(--primary)}
.header-actions .user-menu .sub-menu a svg{width:17px;height:17px;flex:none;color:#8a94a6;transition:color .2s}
.header-actions .user-menu .sub-menu a:hover svg{color:var(--primary)}
.header-actions .user-menu:hover .sub-menu,
.header-actions .user-menu.open .sub-menu{opacity:1;visibility:visible;transform:translateY(0)}
.hamburger{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px}
.hamburger span{width:24px;height:2px;background:#fff;border-radius:2px;transition:all .3s}
.hamburger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.hamburger.open span:nth-child(2){opacity:0}
.hamburger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ===================== 轮播 Hero ===================== */
/* 轮播高度：在 100vh/620px/920px 口径上整体收 1/5（80vh/496px/736px），保持窄屏与超宽屏比例一致 */
.hero{position:relative;height:80vh;min-height:496px;max-height:736px;overflow:hidden;background:var(--dark)}
.slide{position:absolute;inset:0;opacity:0;visibility:hidden;transition:opacity 1s ease,visibility 1s}
.slide.active{opacity:1;visibility:visible;z-index:2}
.slide video{position:absolute;top:50%;left:50%;min-width:100%;min-height:100%;width:auto;height:auto;transform:translate(-50%,-50%);object-fit:cover}
.slide::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(5,10,25,.55) 0%,rgba(5,10,25,.35) 45%,rgba(5,10,25,.72) 100%)}
.slide-content{position:absolute;inset:0;z-index:3;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;color:#fff;padding:0 24px}
.slide-tag{display:inline-block;font-size:13px;letter-spacing:4px;padding:7px 20px;border:1px solid rgba(255,255,255,.4);border-radius:999px;margin-bottom:26px;background:rgba(255,255,255,.08);backdrop-filter:blur(4px);opacity:0;transform:translateY(24px);transition:all .8s ease .3s}
.slide-title{font-size:clamp(30px,5vw,54px);font-weight:800;letter-spacing:2px;line-height:1.3;text-shadow:0 4px 24px rgba(0,0,0,.4);opacity:0;transform:translateY(30px);transition:all .8s ease .45s}
.slide-desc{margin:20px 0 12px;font-size:clamp(14px,1.6vw,18px);color:rgba(255,255,255,.85);max-width:680px;opacity:0;transform:translateY(30px);transition:all .8s ease .6s}
.slide-points{display:flex;gap:28px;flex-wrap:wrap;justify-content:center;margin:10px 0 36px;font-size:14px;color:rgba(255,255,255,.85);opacity:0;transform:translateY(30px);transition:all .8s ease .75s}
.slide-points li{display:flex;align-items:center;gap:7px}
.slide-points svg{flex-shrink:0}
.slide-btns{display:flex;gap:16px;flex-wrap:wrap;justify-content:center;opacity:0;transform:translateY(30px);transition:all .8s ease .9s}
.slide.active .slide-tag,.slide.active .slide-title,.slide.active .slide-desc,.slide.active .slide-points,.slide.active .slide-btns{opacity:1;transform:translateY(0)}
.hero-arrow{position:absolute;top:50%;transform:translateY(-50%);z-index:10;width:48px;height:48px;border-radius:50%;border:1px solid rgba(255,255,255,.4);background:rgba(0,0,0,.25);color:#fff;font-size:20px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .3s;backdrop-filter:blur(4px)}
.hero-arrow:hover{background:rgba(255,255,255,.2)}
.hero-arrow.prev{left:28px}
.hero-arrow.next{right:28px}
.hero-dots{position:absolute;bottom:34px;left:50%;transform:translateX(-50%);z-index:10;display:flex;gap:12px}
.hero-dots button{width:36px;height:4px;border-radius:2px;border:none;background:rgba(255,255,255,.35);cursor:pointer;transition:all .3s;position:relative;overflow:hidden}
.hero-dots button.active{background:var(--accent)}
/* 可点击：button 元素的默认外观全部清掉，只保留文字 + 呼吸动画 */
.scroll-hint{position:absolute;bottom:80px;left:50%;transform:translateX(-50%);z-index:10;color:rgba(255,255,255,.6);font-size:12px;letter-spacing:3px;animation:bob 2s ease-in-out infinite;background:none;border:0;padding:6px 10px;margin:0;font-family:inherit;line-height:1;cursor:pointer;transition:color .3s ease}
.scroll-hint:hover{color:#fff}
@keyframes bob{0%,100%{transform:translate(-50%,0)}50%{transform:translate(-50%,8px)}}

/* ===================== 产品方案 ===================== */
.product-tabs{display:flex;justify-content:center;gap:8px;margin-bottom:30px;flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none;-webkit-overflow-scrolling:touch}
.product-tabs::-webkit-scrollbar{display:none}
.product-tabs::before,.product-tabs::after{content:"";margin:auto;flex-shrink:0}
.product-tabs button{position:relative;flex-shrink:0;white-space:nowrap;background:transparent;border:none;color:#5a5f7a;font-size:15px;font-weight:600;padding:12px 24px;border-radius:40px 40px 0 0;cursor:pointer;transition:all .25s;font-family:inherit}
.product-tabs button:hover{color:#1a1a2e}
.product-tabs button.active{color: #1a1a2e;}
.product-tabs button.active::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--primary)}
.product-panels{position:relative}
.product-panel{display:none}
.product-panel.active{display:block;animation:fadeUp .4s ease}
.product-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;align-items:stretch}
.product-card{display:flex;flex-direction:column;background:#fff;border:1px solid #eef2f6;border-radius:10px;padding:18px 15px 20px;box-shadow:0 8px 20px rgba(0,0,0,.02);transition:all .28s}
.product-card:hover{box-shadow:0 16px 30px -8px rgba(0,34,68,.10);transform:translateY(-3px);border-color:#e2e8f2}
.product-name{font-size:18px;font-weight:700;color:#1a1a2e;margin-bottom:16px;letter-spacing:-.01em;text-align:center}
.product-name .icon-dot{display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--primary);margin-right:8px;vertical-align:middle;position:relative;top:-1px}
.spec-list{list-style:none;margin:0 0 14px;padding:0}
.spec-list li{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:13.5px;color:#5a5f7a;padding:7px 11px;background:#fafbfd;border-radius:8px;margin-bottom:6px;transition:background .28s}
.spec-list li:hover{background:#f2f4fa}
.spec-label{font-weight:500;color:#8c8fa6;font-size:13px;letter-spacing:.3px;white-space:nowrap}
.spec-value{font-weight:600;color:#1a1a2e;font-size:13.5px;text-align:right}
.datacenter-info{display:flex;align-items:center;gap:7px;font-size:13.5px;color:#5a5f7a;margin-bottom:12px;padding:6px 0}
.datacenter-info .dc-label{font-weight:500;color:#8c8fa6;font-size:13px;white-space:nowrap}
.datacenter-info .dc-name{font-weight:600;font-size:13.5px;color:#1a1a2e;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.badge-group{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:16px}
.custom-badge{display:inline-flex;align-items:center;gap:4px;font-size:11px;font-weight:600;padding:4px 9px;border-radius:6px;background:#f7f8fc;color:#5a5f7a;letter-spacing:.3px;white-space:nowrap;transition:all .28s;border:1px solid transparent;line-height:1.3}
.custom-badge:hover{background:#eef1ff;color:#4f6ef7;border-color:#d5dbfa}
.badge-dot{width:5px;height:5px;border-radius:50%;display:inline-block;flex-shrink:0}
.badge-dot.green{background:#4caf84}
.badge-dot.blue{background:#5b8def}
.badge-dot.orange{background:#f0a058}
.price-area{margin-top:auto;padding-top:15px;border-top:1px solid #eef0f5}
.price-main{display:flex;align-items:baseline;gap:2px;line-height:1;margin-bottom:12px}
.currency{font-size:16px;font-weight:700;color:var(--primary);align-self:flex-start;margin-top:2px}
.amount{font-size:30px;font-weight:800;color:var(--primary);letter-spacing:-.03em;line-height:1}
.period{font-size:13px;font-weight:500;color:#8c8fa6;margin-left:2px;align-self:flex-end;margin-bottom:3px}
.btn-group{display:grid;grid-template-columns:repeat(auto-fit,minmax(118px,1fr));gap:8px}
.btn-buy{background:var(--primary);color:#fff;border:none;padding:10px 12px;font-size:14px;font-weight:600;letter-spacing:.3px;border-radius:22px;transition:all .28s;box-shadow:0 4px 14px rgba(230,0,18,.28);width:100%;display:block;text-align:center}
.btn-buy:hover,.btn-buy:focus{color:#fff;box-shadow:0 8px 22px rgba(230,0,18,.42);transform:translateY(-3px);text-decoration:none;outline:none}
.btn-wholesale{background:#fff;color:var(--primary);border:2px solid var(--primary);padding:8px 12px;font-size:14px;font-weight:600;letter-spacing:.3px;border-radius:22px;transition:all .28s;box-shadow:0 2px 8px rgba(230,0,18,.1);width:100%;display:block;text-align:center}
.btn-wholesale:hover,.btn-wholesale:focus{background:#fff5f5;color:var(--primary);box-shadow:0 6px 18px rgba(230,0,18,.25);transform:translateY(-3px);text-decoration:none;outline:none}
.product-subtabs{display:none}

/* ===================== 性价比 ===================== */
.value-title{margin-top:104px}
.value-wrap{background:rgba(255,255,255,.34);border:1px solid rgba(255,255,255,.8);border-radius:var(--radius);box-shadow:0 12px 38px rgba(24,24,28,.09);overflow:hidden;display:grid;grid-template-columns:200px 1fr;backdrop-filter:blur(5px);-webkit-backdrop-filter:blur(5px)}
.value-sidebar{background:rgba(255,255,255,.5);border-right:1px solid rgba(24,24,28,.06);padding:28px 0}
.value-tabs{display:flex;flex-direction:column}
.value-tabs button{position:relative;width:100%;text-align:left;padding:16px 28px;border:none;background:transparent;color:var(--text-2);font-size:15px;font-weight:600;cursor:pointer;transition:all .25s;font-family:inherit}
.value-tabs button::before{content:"";position:absolute;left:0;top:50%;transform:translateY(-50%) scaleY(0);width:3px;height:22px;background:var(--primary);border-radius:0 3px 3px 0;transition:transform .25s}
.value-tabs button:hover{color:var(--text);background:rgba(255,255,255,.5)}
.value-tabs button.active{color:var(--primary);background:rgba(255,255,255,.78)}
.value-tabs button.active::before{transform:translateY(-50%) scaleY(1)}
.value-main{display:flex;flex-direction:column}
.value-panels{flex:1}
.value-panel{display:none}
.value-panel.active{display:block}
.value-panel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:rgba(24,24,28,.10)}
.vp-card{padding:28px 26px;background:rgba(255,255,255,.52);transition:background .3s,box-shadow .3s;position:relative;z-index:1}
.vp-card:hover{background:rgba(255,255,255,.8);z-index:2;box-shadow:0 10px 28px rgba(24,24,28,.12)}
.vp-visual{width:64px;height:64px;margin-bottom:18px;border-radius:12px;position:relative;overflow:hidden;display:flex;align-items:center;justify-content:center;color:#fff;background:linear-gradient(135deg,#e60012,#ff7a2f);box-shadow:0 8px 20px rgba(230,0,18,.22);transition:transform .3s,box-shadow .3s}
.vp-card:hover .vp-visual{transform:translateY(-3px);box-shadow:0 12px 26px rgba(230,0,18,.3)}
/* 卡片图标：24×24 线框图标（sprite），白色描边 */
.vp-visual .vp-ico{width:32px;height:32px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.vp-card h4{font-size:16px;font-weight:700;margin-bottom:6px;color:var(--text);transition:color .3s}
.vp-card:hover h4{color:var(--primary)}
.vp-card .vp-desc{font-size:13px;color:var(--text-2);line-height:1.7;margin-bottom:14px;min-height:44px}
.vp-price{font-size:13px;color:var(--text-2);margin-bottom:12px}
.vp-price strong{font-size:24px;color:var(--primary);font-weight:800;margin:0 2px}
.vp-tags{display:flex;flex-wrap:wrap;gap:8px}
.vp-tags span{display:inline-block;padding:5px 12px;border:1px solid rgba(24,24,28,.1);border-radius:4px;font-size:12px;color:var(--text-2);background:rgba(255,255,255,.6)}

/* ===================== 数据统计 ===================== */
.value-stats{display:grid;grid-template-columns:1fr 2.4fr;gap:48px;align-items:center;margin-top:56px;padding:0;background:transparent;position:relative}
.value-stats-left h3{position:relative;font-size:28px;font-weight:800;margin-bottom:12px;color:var(--text);letter-spacing:1px;padding-left:18px}
.value-stats-left h3::before{content:"";position:absolute;left:0;top:7px;bottom:7px;width:4px;border-radius:2px;background:linear-gradient(180deg,var(--primary),#ff7a2f)}
.value-stats-left p{color:var(--text-2);font-size:15px;line-height:1.9;margin-bottom:20px;max-width:290px;padding-left:18px}
.value-stats-left .btn{margin-left:18px;padding:12px 28px;font-size:14px}
.value-stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;text-align:center}
.value-stats-grid>div{position:relative;padding:0 14px}
.value-stats-grid>div+div::before{content:"";position:absolute;left:0;top:14%;bottom:14%;width:1px;background:linear-gradient(180deg,transparent,rgba(24,24,28,.14),transparent)}
.value-stats-grid .stat-num{font-size:48px;font-weight:800;background:linear-gradient(135deg,#ff4d4d,#ff6a00);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;line-height:1.2;letter-spacing:-1px}
.value-stats-grid .stat-num em{font-style:normal;font-size:20px}
.value-stats-grid p{margin-top:10px;color:var(--text-2);font-size:13.5px;line-height:1.7;letter-spacing:.5px}

/* ===================== 基础业务 ===================== */
.biz-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.biz-card{position:relative;overflow:hidden;border-radius:14px;padding:44px 32px;text-align:center;color:var(--text);background:#fff;border:1px solid rgba(24,24,28,.07);box-shadow:0 6px 20px rgba(24,24,28,.05);transition:all .35s;min-height:260px;display:flex;flex-direction:column;align-items:center;justify-content:center}
.biz-card:hover{transform:translateY(-8px);box-shadow:0 20px 44px rgba(24,24,28,.11);border-color:rgba(24,24,28,.1)}
.biz-card::before{content:"";position:absolute;inset:0;pointer-events:none;background:radial-gradient(circle at 50% 0%,rgba(24,24,28,.035),transparent 62%)}
.biz-card::after{content:"";position:absolute;left:0;right:0;top:0;height:3px;pointer-events:none;background:var(--biz-accent);transform:scaleX(.24);transform-origin:center;transition:transform .4s ease}
.biz-card:hover::after{transform:scaleX(1)}
.biz-1{--biz-accent:linear-gradient(135deg,#e60012,#ff7a2f);--biz-glow:rgba(230,0,18,.26)}
.biz-2{--biz-accent:linear-gradient(135deg,#343941,#181a1e);--biz-glow:rgba(24,24,28,.26)}
.biz-3{--biz-accent:linear-gradient(135deg,#3c4c5e,#202b35);--biz-glow:rgba(32,43,53,.24)}
.biz-icon{width:66px;height:66px;border-radius:50%;background:var(--biz-accent);display:flex;align-items:center;justify-content:center;margin-bottom:22px;box-shadow:0 10px 24px var(--biz-glow);transition:transform .35s}
.biz-card:hover .biz-icon{transform:translateY(-4px) scale(1.05)}
.biz-card h3{font-size:20px;font-weight:700;margin-bottom:12px;color:var(--text)}
.biz-card p{font-size:13.5px;color:var(--text-2);line-height:1.85}
.biz-card a{margin-top:20px;font-size:13px;color:var(--primary);opacity:.9;display:inline-flex;align-items:center;gap:6px;transition:all .3s}
.biz-card a:hover{opacity:1;gap:10px}

/* ===================== 功能展示（虚拟主机） ===================== */
.feature-showcase{position:relative;overflow:hidden;color:#fff;padding:120px 0;background:#05070a}
.feature-showcase .container{position:relative;z-index:2}
.feature-bg{position:absolute;inset:0;z-index:0;overflow:hidden}
/* ---------- 功能展示背景：CSS 绘制（绚丽渐变 + 科技几何 + 微动画） ---------- */
.feature-bg-item{position:absolute;inset:0;opacity:0;transition:opacity .8s ease;overflow:hidden;background-color:#05070a}
.feature-bg-item.active{opacity:1}
.feature-bg-item::before,.feature-bg-item::after{content:"";position:absolute;pointer-events:none;will-change:transform}
/* 关键帧：位移量均与图案周期对齐，循环无跳变 */
@keyframes fbAurora{0%{transform:translate3d(-3%,2%,0) scale(1.02)}100%{transform:translate3d(4%,-3%,0) scale(1.1)}}
@keyframes fbPush{0%{transform:scale(1);opacity:0}25%{opacity:.55}100%{transform:scale(1.3);opacity:0}}
@keyframes fbPlaneDrift{from{transform:translate3d(0,0,0)}to{transform:translate3d(56px,56px,0)}}
@keyframes fbGlow{0%,100%{opacity:.35;transform:scale(1)}50%{opacity:1;transform:scale(1.08)}}
@keyframes fbSpin{to{transform:rotate(360deg)}}
@keyframes fbSpinSlow{to{transform:rotate(-360deg)}}
@keyframes fbFloat{0%,100%{transform:translate3d(0,0,0) rotate(0)}50%{transform:translate3d(0,-22px,0) rotate(5deg)}}
@keyframes fbPulse{0%,100%{opacity:.5;transform:scale(1)}50%{opacity:1;transform:scale(1.05)}}
@keyframes fbSweepX{0%{transform:translate3d(-40%,0,0)}100%{transform:translate3d(40%,0,0)}}

/* 1｜数据流光：漂浮极光 + 网格向前推进（数据隧道感） */
.feature-bg-item:nth-child(1){
  background:
    repeating-linear-gradient(0deg,rgba(96,165,250,.13) 0 1px,transparent 1px 64px),
    repeating-linear-gradient(90deg,rgba(96,165,250,.13) 0 1px,transparent 1px 64px),
    radial-gradient(760px 520px at 78% 6%,rgba(34,211,238,.18),transparent 66%),
    linear-gradient(150deg,#041a33 0%,#0b2450 42%,#1a0b33 100%)}
/* 漂浮光晕：青、紫两团光沿不同路径缓慢游走 */
.feature-bg-item:nth-child(1)::before{
  inset:-12%;
  background:
    radial-gradient(480px 380px at 26% 28%,rgba(56,189,248,.36),transparent 62%),
    radial-gradient(440px 350px at 76% 70%,rgba(168,85,247,.32),transparent 64%);
  animation:fbAurora 18s ease-in-out infinite alternate}
/* 网格推进：整体缓慢放大并淡入淡出，形成向前推进的空间感 */
.feature-bg-item:nth-child(1)::after{
  inset:0;
  background:
    repeating-linear-gradient(0deg,rgba(125,211,252,.22) 0 1px,transparent 1px 72px),
    repeating-linear-gradient(90deg,rgba(125,211,252,.22) 0 1px,transparent 1px 72px);
  -webkit-mask-image:radial-gradient(closest-side,#000 26%,transparent 88%);
  mask-image:radial-gradient(closest-side,#000 26%,transparent 88%);
  animation:fbPush 11s ease-out infinite}
/* 2｜电路脉冲：斜向电路走线缓慢旋转 + 光脉冲横扫 */
.feature-bg-item:nth-child(2){background:linear-gradient(135deg,#0a1a44 0%,#071026 48%,#22103f 100%)}
.feature-bg-item:nth-child(2)::before{
  inset:-40%;
  background:
    repeating-linear-gradient(45deg,rgba(99,102,241,.26) 0 2px,transparent 2px 52px),
    repeating-linear-gradient(-45deg,rgba(34,211,238,.20) 0 2px,transparent 2px 76px),
    radial-gradient(560px 420px at 22% 20%,rgba(59,130,246,.38),transparent 60%),
    radial-gradient(560px 420px at 86% 82%,rgba(217,70,239,.30),transparent 62%);
  animation:fbSpinSlow 90s linear infinite}
.feature-bg-item:nth-child(2)::after{
  inset:0;
  background:linear-gradient(108deg,transparent 36%,rgba(125,211,252,.30) 47%,rgba(255,255,255,.22) 50%,rgba(125,211,252,.08) 54%,transparent 64%);
  animation:fbSweepX 6.5s ease-in-out infinite alternate}

/* 3｜雷达扫描：锥形扫描光束 + 同心数据环 */
.feature-bg-item:nth-child(3){background:radial-gradient(120% 120% at 50% 45%,#0b2b4d 0%,#081a33 52%,#160b33 100%)}
.feature-bg-item:nth-child(3)::before{
  inset:-20%;
  background:conic-gradient(from 0deg at 50% 45%,transparent 0deg 288deg,rgba(34,211,238,.10) 320deg,rgba(56,189,248,.42) 352deg,rgba(255,255,255,.30) 358deg,transparent 360deg);
  animation:fbSpin 14s linear infinite}
.feature-bg-item:nth-child(3)::after{
  inset:0;
  background:
    repeating-radial-gradient(circle at 50% 45%,rgba(56,189,248,.30) 0 1px,transparent 1px 84px),
    radial-gradient(600px 420px at 84% 84%,rgba(217,70,239,.26),transparent 60%);
  animation:fbPulse 7s ease-in-out infinite}

/* 4｜晶格多面体：两枚发光切面漂浮 */
.feature-bg-item:nth-child(4){background:linear-gradient(125deg,#1b0b38 0%,#0a1030 52%,#04222e 100%)}
.feature-bg-item:nth-child(4)::before{
  inset:auto;right:3%;top:4%;width:400px;height:400px;
  background:linear-gradient(140deg,rgba(168,85,247,.55),rgba(59,130,246,.20) 55%,rgba(34,211,238,.10));
  clip-path:polygon(50% 0,100% 32%,82% 100%,18% 100%,0 32%);
  animation:fbFloat 14s ease-in-out infinite}
.feature-bg-item:nth-child(4)::after{
  inset:auto;left:5%;bottom:3%;width:320px;height:320px;
  background:linear-gradient(140deg,rgba(34,211,238,.45),rgba(217,70,239,.18) 60%,transparent);
  clip-path:polygon(50% 0,100% 50%,50% 100%,0 50%);
  animation:fbFloat 10s ease-in-out infinite reverse}

/* 5｜数据网格：点阵平面漂移 + 数据点脉冲 */
.feature-bg-item:nth-child(5){
  background:
    radial-gradient(700px 420px at 20% 80%,rgba(34,211,238,.28),transparent 60%),
    radial-gradient(560px 380px at 88% 18%,rgba(129,140,248,.32),transparent 62%),
    radial-gradient(circle at 1.6px 1.6px,rgba(56,189,248,.32) 1.6px,transparent 1.8px) 0 0/30px 30px,
    linear-gradient(200deg,#041a2e 0%,#061024 55%,#120a2e 100%)}
.feature-bg-item:nth-child(5)::before{
  inset:-56px;
  background:
    radial-gradient(circle at 1.6px 1.6px,rgba(125,211,252,.60) 1.6px,transparent 1.8px) 0 0/28px 28px,
    repeating-linear-gradient(0deg,rgba(56,189,248,.12) 0 1px,transparent 1px 28px),
    repeating-linear-gradient(90deg,rgba(56,189,248,.12) 0 1px,transparent 1px 28px);
  animation:fbPlaneDrift 9s linear infinite}
.feature-bg-item:nth-child(5)::after{
  inset:0;
  background:
    radial-gradient(240px 170px at 24% 30%,rgba(125,211,252,.45),transparent 70%),
    radial-gradient(220px 160px at 72% 62%,rgba(217,70,239,.38),transparent 72%),
    radial-gradient(200px 140px at 46% 86%,rgba(56,189,248,.42),transparent 72%);
  animation:fbGlow 7s ease-in-out infinite}
@media (prefers-reduced-motion:reduce){
  .feature-bg-item::before,.feature-bg-item::after{animation:none}
}
/* 仅当前展示的背景运行动画，隐藏项暂停以节省性能
   （用 :nth-child(n) 提升特异性，压过上面各 item 的 animation 简写） */
.feature-bg-item:nth-child(n)::before,.feature-bg-item:nth-child(n)::after{animation-play-state:paused}
.feature-bg-item.active::before,.feature-bg-item.active::after{animation-play-state:running}
.feature-bg::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(5,7,10,.86) 0%,rgba(5,7,10,.38) 50%,rgba(5,7,10,.74) 100%)}
.feature-header{text-align:center;margin-bottom:44px}
.feature-showcase .section-title{color:#fff;margin-bottom:16px}
.feature-showcase .section-sub{color:rgba(255,255,255,.72);max-width:740px;margin:0 auto}
.feature-tabs{display:flex;justify-content:center;gap:34px;flex-wrap:wrap;margin-bottom:52px;border-bottom:1px solid rgba(255,255,255,.16)}
.feature-tabs button{position:relative;display:inline-flex;align-items:center;gap:8px;background:transparent;border:none;color:rgba(255,255,255,.72);font-size:15px;font-weight:500;cursor:pointer;padding:8px 0 14px;transition:all .3s;font-family:inherit}
.feature-tabs .tab-ico{width:18px;height:18px;flex:none;opacity:.72;transition:opacity .3s}
.feature-tabs button:hover .tab-ico{opacity:.95}
.feature-tabs button.active .tab-ico{opacity:1}
.feature-tabs button::after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:2px;background:var(--primary);border-radius:2px;transform:scaleX(0);transform-origin:center;transition:transform .3s}
.feature-tabs button:hover{color:#fff}
.feature-tabs button.active{color:#fff}
.feature-tabs button.active::after{transform:scaleX(1)}
.feature-panels{position:relative}
.feature-panel{display:none}
.feature-panel.active{display:block;animation:fadeUp .5s ease}
@keyframes fadeUp{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:translateY(0)}}
.feature-layout{display:grid;grid-template-columns:1.35fr 1fr;gap:60px;align-items:center}
.feature-main{position:relative;z-index:2}
.feature-title-row{display:flex;align-items:center;gap:18px;margin-bottom:22px}
.feature-main h3{font-size:26px;font-weight:700;color:#fff;letter-spacing:.5px}
.feature-play{width:46px;height:46px;border-radius:50%;border:1px solid rgba(255,255,255,.4);background:rgba(255,255,255,.12);color:#fff;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .3s;backdrop-filter:blur(4px)}
.feature-play:hover{background:rgba(255,255,255,.25);transform:scale(1.08)}
.feature-play svg{margin-left:3px}
.feature-desc{color:rgba(255,255,255,.78);font-size:14px;line-height:1.95;margin-bottom:30px}
.feature-desc h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:8px}
.feature-desc p{margin-bottom:10px}
.feature-tags{display:flex;flex-wrap:wrap;gap:10px}
.feature-tags span{padding:8px 16px;border:1px solid rgba(255,255,255,.22);border-radius:4px;font-size:13px;color:rgba(255,255,255,.85);background:rgba(255,255,255,.08);transition:all .3s}
.feature-tags span:hover{background:rgba(255,255,255,.18);border-color:rgba(255,255,255,.4)}
.feature-visual{display:flex;align-items:center;justify-content:center;position:relative}
.feature-visual svg{filter:drop-shadow(0 14px 30px rgba(0,0,0,.55)) drop-shadow(0 0 26px rgba(34,211,238,.25))}

/* ---------- 功能展示：动画插图（整屏一个完整动画 + 悬停局部互动） ---------- */
.fx-defs{position:absolute;width:0;height:0;overflow:hidden}
.fx{width:280px;max-width:100%}
.fx-stage{position:relative;width:100%;aspect-ratio:1/1;--loop:7s;
  display:flex;align-items:center;justify-content:center;border-radius:26px;
  border:1px solid rgba(255,255,255,.14);
  background:linear-gradient(160deg,rgba(255,255,255,.09),rgba(255,255,255,.02));
  box-shadow:inset 0 1px 0 rgba(255,255,255,.14),0 20px 44px -24px rgba(0,0,0,.95);
  transition:border-color .4s,background .4s,box-shadow .4s}
.fx:hover .fx-stage{border-color:rgba(34,211,238,.6);
  background:linear-gradient(160deg,rgba(34,211,238,.18),rgba(255,255,255,.04));
  box-shadow:inset 0 1px 0 rgba(255,255,255,.2),0 24px 52px -20px rgba(34,211,238,.55)}
.fx svg{width:100%;height:100%;overflow:visible}
.fx svg *{transform-box:fill-box;transform-origin:center}

/* 所有分镜共用一条「6s 故事循环」：动作在前段完成，后段保持终态，
   元素之间靠 --d 错开，保证每次循环都同步 */
.fx [class*="a-"]{animation-duration:var(--loop,6s);animation-delay:var(--d,0s);
  animation-iteration-count:infinite;animation-fill-mode:both;animation-timing-function:ease-out}
.fx .a-flow,.fx .a-pass,.fx .a-bad,.fx .a-fall{animation-timing-function:linear}

/* 悬停互动：只作用于「不参与主动画」的装饰元素（光标、光环、描边），
   不重播、不打断主循环，鼠标移开即平滑收起 */
.fx .h-in{opacity:0;transform:translateY(6px);transition:opacity .35s ease,transform .35s cubic-bezier(.2,.8,.2,1)}
.fx:hover .h-in{opacity:1;transform:none}
.fx .h-bright{opacity:.55;transition:opacity .35s}
.fx:hover .h-bright{opacity:1}
.fx .h-pulse{opacity:0}
.fx:hover .h-pulse{animation:hPulse 1.5s ease-in-out infinite}
.fx .h-sweep{opacity:0}
.fx:hover .h-sweep{animation:hSweep 1.6s linear infinite}
.fx .h-knock{opacity:0}
.fx:hover .h-knock{animation:hKnock 1.9s ease-in-out infinite}
@keyframes hPulse{0%,100%{opacity:.2;transform:scale(1)}50%{opacity:.85;transform:scale(1.07)}}
@keyframes hSweep{0%{opacity:0;transform:translateX(-14px)}18%{opacity:1}82%{opacity:1}100%{opacity:0;transform:translateX(50px)}}
@keyframes hKnock{0%{opacity:0;transform:translate(28px,-16px)}20%{opacity:1;transform:translate(0,0)}32%{transform:translate(0,0)}46%{transform:translate(22px,-13px)}62%,100%{opacity:0;transform:translate(28px,-16px)}}

.fx .a-pop{animation-name:fxPop}
.fx .a-in{animation-name:fxIn}
.fx .a-out{animation-name:fxOut}
.fx .a-ripple{animation-name:fxRipple}
.fx .a-move{animation-name:fxMove}
.fx .a-flow{animation-name:fxFlow}
.fx .a-fall{animation-name:fxFall}
.fx .a-shatter{animation-name:fxShatter}
.fx .a-flash{animation-name:fxFlash}
.fx .a-wave{animation-name:fxWave}
.fx .a-press{animation-name:fxPress}
.fx .a-pass{animation-name:fxPass}
.fx .a-bad{animation-name:fxBad}
.fx .a-grow{transform-origin:0 50%;animation-name:fxGrow}
.fx .a-spark{animation-name:fxSpark}
.fx .a-snap{animation-name:fxSnap}
.fx .a-swin{animation-name:fxSwapIn}
.fx .a-swout{animation-name:fxSwapOut}
.fx .a-dart{animation-name:fxDart}
.fx .a-dartarc{animation-name:fxDartArc}

@keyframes fxPop{0%{opacity:0;transform:scale(.35)}6%{opacity:1;transform:scale(1.16)}11%,100%{opacity:1;transform:scale(1)}}
@keyframes fxIn{0%,3%{opacity:0}11%,100%{opacity:1}}
@keyframes fxOut{0%,3%{opacity:1}11%,100%{opacity:0}}
@keyframes fxRipple{0%{opacity:.9;transform:scale(.15)}24%{opacity:0;transform:scale(2.6)}100%{opacity:0;transform:scale(2.6)}}
@keyframes fxMove{0%{transform:translate(0,0)}32%,100%{transform:translate(var(--x,0),var(--y,0))}}
@keyframes fxFlow{from{transform:translateX(0)}to{transform:translateX(var(--x,-60px))}}
@keyframes fxFall{0%{transform:translateY(0);opacity:0}8%{opacity:1}86%{opacity:1}100%{transform:translateY(var(--y,150px));opacity:0}}
@keyframes fxShatter{0%,28%{opacity:1;transform:scale(1)}34%{opacity:1;transform:scale(1.14)}48%,100%{opacity:0;transform:scale(.3) rotate(24deg)}}
@keyframes fxFlash{0%,16%{opacity:0}20%{opacity:.45}25%{opacity:0}46%{opacity:0}50%{opacity:.45}55%,100%{opacity:0}}
@keyframes fxWave{0%,38%{transform:scaleX(1)}46%{transform:scaleX(1.09)}56%{transform:scaleX(.93)}66%,100%{transform:scaleX(1)}}
@keyframes fxPress{0%,13%{transform:scale(1)}17%{transform:scale(.88)}23%,100%{transform:scale(1)}}
@keyframes fxPass{0%{transform:translateX(0);opacity:0}6%{opacity:1}88%{opacity:1}100%{transform:translateX(var(--x,180px));opacity:0}}
@keyframes fxBad{0%{transform:translateX(0);opacity:0}6%{opacity:1}30%{opacity:1;transform:translateX(var(--x,80px))}36%{opacity:1;transform:translateX(var(--x,80px)) scale(1.16)}52%,100%{opacity:0;transform:translateX(var(--x,80px)) scale(.25)}}
@keyframes fxGrow{0%{transform:scaleX(0)}14%,100%{transform:scaleX(1)}}
@keyframes fxSpark{0%,90%{opacity:0;transform:translate(0,0) scale(.3)}92%{opacity:1;transform:translate(0,0) scale(1)}100%{opacity:0;transform:translate(var(--x,0),var(--y,0)) scale(.2)}}
/* 飞入吸附：到位瞬间放大一点再回弹，收得干脆 */
@keyframes fxSnap{0%{opacity:0;transform:translate(0,0) scale(.92)}8%{opacity:1}34%{transform:translate(var(--x,0),var(--y,0)) scale(1.09)}42%{transform:translate(var(--x,0),var(--y,0)) scale(.95)}50%,100%{transform:translate(var(--x,0),var(--y,0)) scale(1)}}
/* 瞬移换装：几乎无过渡的整层换装 */
@keyframes fxSwapIn{0%,58%{opacity:0}60%,100%{opacity:1}}
@keyframes fxSwapOut{0%,56%{opacity:1}60%,100%{opacity:0}}
/* 光点注入：外层走直线，内层叠一条抛物线，合成弧线轨迹 */
@keyframes fxDart{0%,24%{opacity:0;transform:translate(0,0)}28%{opacity:1}54%{opacity:1;transform:translate(var(--x,40px),var(--y,-58px))}58%,100%{opacity:0;transform:translate(var(--x,40px),var(--y,-58px))}}
@keyframes fxDartArc{0%,24%{transform:translateY(0)}38%{transform:translateY(var(--a,-34px))}54%,100%{transform:translateY(0)}}

@media (prefers-reduced-motion:reduce){
  .fx [class*="a-"]{animation:none!important;opacity:1!important;transform:none!important}
}

/* ===================== 视频弹窗 ===================== */
.video-modal{position:fixed;inset:0;z-index:1201;background:rgba(5,7,10,.92);backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:center;opacity:0;visibility:hidden;transition:all .3s}
.video-modal.show{opacity:1;visibility:visible}
.video-box{position:relative;width:min(900px,94vw);background:#000;border-radius:12px;overflow:hidden;box-shadow:0 20px 60px rgba(0,0,0,.5)}
.video-box video{width:100%;height:auto;display:block;aspect-ratio:16/9}
.video-close{position:absolute;top:-42px;right:0;background:transparent;border:none;color:#fff;font-size:26px;cursor:pointer;transition:opacity .2s}
.video-close:hover{opacity:.7}

@keyframes spin{to{transform:rotate(360deg)}}

/* ===================== 新闻中心 ===================== */
.news-tabs{display:none}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.news-col{background:#fff;border:1px solid #eaeef6;border-radius:var(--radius);padding:28px 26px}
.news-col header{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px;padding-bottom:14px;border-bottom:1px solid #eef2f8}
.news-col h3{font-size:17px;font-weight:700;display:flex;align-items:center;gap:8px}
.news-col h3::before{content:"";width:4px;height:16px;border-radius:2px;background:linear-gradient(180deg,var(--primary),#ff7a2f)}
.news-col header a{font-size:12px;color:#9aa7ba}
.news-col header a:hover{color:var(--primary)}
.news-col li a{display:flex;justify-content:space-between;gap:12px;font-size:13.5px;color:var(--text-2);padding:8px 0;transition:color .2s}
.news-col li a:hover{color:var(--primary)}
.news-col li a span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.news-col li a time{flex-shrink:0;color:#b0bacb;font-size:12px}

/* ===================== 服务承诺 ===================== */
.promise{position:relative;background:linear-gradient(180deg,#fff 0%,#f6f7fb 100%);padding:58px 0;border-top:1px solid #eef0f6}
.promise .container{display:grid;grid-template-columns:repeat(6,1fr);gap:22px}
.promise-item{position:relative;display:flex;flex-direction:column;align-items:center;gap:10px;text-align:center;padding:0 8px}
.promise-item+.promise-item::before{content:"";position:absolute;left:0;top:14%;bottom:14%;width:1px;background:linear-gradient(180deg,transparent,rgba(24,24,28,.13),transparent)}
.promise-icon{width:48px;height:48px;border-radius:14px;display:flex;align-items:center;justify-content:center;color:var(--primary);background:linear-gradient(180deg,rgba(230,0,18,.09),rgba(230,0,18,.02));border:1px solid rgba(230,0,18,.12);transition:all .35s}
.promise-item:hover .promise-icon{transform:translateY(-4px);background:linear-gradient(135deg,#e60012,#ff7a2f);color:#fff;border-color:transparent;box-shadow:0 12px 24px rgba(230,0,18,.26)}
.promise-item b{font-size:23px;font-weight:800;color:#1a1a2e;letter-spacing:-.4px;line-height:1.2}
.promise-item b em{font-style:normal;font-size:13px;font-weight:700;color:var(--primary);margin-left:1px}
.promise-label{font-size:13px;color:var(--text-2);letter-spacing:.6px}

/* ===================== 页脚 ===================== */
.site-footer{position:relative;overflow:hidden;background:linear-gradient(180deg,#0c0e13 0%,#0a0b10 60%,#080910 100%);color:rgba(255,255,255,.62);font-size:13.5px}
.site-footer::before{content:"";position:absolute;left:0;right:0;top:0;height:2px;background:linear-gradient(90deg,transparent,rgba(230,0,18,.9) 22%,rgba(255,122,47,.85) 50%,rgba(230,0,18,.9) 78%,transparent)}
.site-footer .container{position:relative;z-index:2}
.footer-deco{position:absolute;inset:0;z-index:0;pointer-events:none;overflow:hidden}
.footer-deco i{position:absolute;display:block;border-radius:50%;filter:blur(90px)}
.footer-deco i:nth-child(1){width:440px;height:440px;left:-130px;top:-170px;background:rgba(230,0,18,.16)}
.footer-deco i:nth-child(2){width:400px;height:400px;right:-120px;bottom:-180px;background:rgba(58,92,168,.16)}
.deco-grid{position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);background-size:64px 64px;-webkit-mask-image:radial-gradient(circle at 50% 0%,#000,transparent 70%);mask-image:radial-gradient(circle at 50% 0%,#000,transparent 70%)}

/* 咨询引导条 */
.footer-top{display:flex;align-items:center;justify-content:space-between;gap:36px;flex-wrap:wrap;padding:52px 0 42px;border-bottom:1px solid rgba(255,255,255,.08)}
.footer-cta h3{color:#fff;font-size:27px;font-weight:800;letter-spacing:.6px;margin-bottom:10px}
.footer-cta p{font-size:14px;color:rgba(255,255,255,.5);letter-spacing:.3px}
.footer-actions{display:flex;gap:14px;flex-wrap:wrap}
.btn-brand{background:linear-gradient(135deg,#e60012,#ff5a1f);color:#fff;padding:14px 34px;border-radius:999px;font-weight:700;box-shadow:0 12px 28px rgba(230,0,18,.3)}
.btn-brand:hover{color:#fff;transform:translateY(-2px);box-shadow:0 18px 36px rgba(230,0,18,.42)}
.btn-line{border:1px solid rgba(255,255,255,.26);color:rgba(255,255,255,.92);padding:13px 30px;border-radius:999px;font-weight:600;background:rgba(255,255,255,.04)}
.btn-line:hover{color:#fff;border-color:rgba(255,255,255,.55);background:rgba(255,255,255,.1)}

/* 主体四栏 */
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1.4fr;gap:46px;padding:52px 0 42px}
.footer-brand .logo{margin-bottom:18px}
.footer-brand .logo-img{height:44px}
.footer-desc{line-height:1.95;font-size:13px;color:rgba(255,255,255,.5);max-width:350px}
.footer-social{display:flex;gap:10px;margin-top:24px}
.footer-social a{width:38px;height:38px;border-radius:50%;display:flex;align-items:center;justify-content:center;color:rgba(255,255,255,.72);border:1px solid rgba(255,255,255,.14);background:rgba(255,255,255,.04);transition:all .3s}
.footer-social a:hover{color:#fff;transform:translateY(-3px);border-color:transparent;background:linear-gradient(135deg,#e60012,#ff7a2f);box-shadow:0 10px 20px rgba(230,0,18,.32)}
.footer-col h4{position:relative;color:#fff;font-size:15px;font-weight:700;letter-spacing:1.2px;margin-bottom:24px;padding-bottom:14px}
.footer-col h4::after{content:"";position:absolute;left:0;bottom:0;width:26px;height:2px;border-radius:2px;background:linear-gradient(90deg,#e60012,#ff7a2f)}
.footer-nav .fc-arrow{display:none}
.footer-col li{margin-bottom:13px;color:rgba(255,255,255,.6)}
.footer-col li a{position:relative;display:inline-block;font-size:13.5px;color:rgba(255,255,255,.6);transition:color .28s}
.footer-col li a::after{content:"";position:absolute;left:0;bottom:-3px;width:0;height:1px;background:var(--primary);transition:width .28s}
.footer-col li a:hover{color:#fff}
.footer-col li a:hover::after{width:100%}
.footer-contact li{display:flex;gap:13px;align-items:flex-start;margin-bottom:18px}
.footer-contact .ci{width:36px;height:36px;border-radius:11px;flex-shrink:0;display:flex;align-items:center;justify-content:center;color:rgba(255,255,255,.9);background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.09)}
.foo-strong{font-size:17px;font-weight:700;color:#fff;letter-spacing:.4px;line-height:1.4}
.foo-sub{font-size:12px;color:rgba(255,255,255,.42);margin-top:3px}
.footer-qr{display:flex;gap:14px;align-items:center;margin-top:22px;padding:14px;border-radius:14px;background:rgba(255,255,255,.045);border:1px solid rgba(255,255,255,.08)}
.footer-qr .qr{width:84px;height:84px;flex-shrink:0;background:#fff;border-radius:10px;padding:6px}
.footer-qr p{font-size:12.5px;line-height:1.8;color:rgba(255,255,255,.5)}

/* 底部版权栏 */
.footer-bottom{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;border-top:1px solid rgba(255,255,255,.08);padding:22px 0 30px}
.copyright{font-size:12.5px;line-height:1.9;color:rgba(255,255,255,.38)}
.footer-links{display:flex;gap:20px;flex-wrap:wrap}
.footer-links a{font-size:12.5px;color:rgba(255,255,255,.45);transition:color .25s}
.footer-links a:hover{color:#fff}

/* ===================== 友情链接 ===================== */
.links-section{background:#f7f8fb;padding:46px 0;border-top:1px solid #eef0f6}
.links-head{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:22px}
.links-head h3{position:relative;font-size:17px;font-weight:700;color:var(--text);letter-spacing:.5px;padding-left:14px}
.links-head h3::before{content:"";position:absolute;left:0;top:3px;bottom:3px;width:4px;border-radius:2px;background:linear-gradient(180deg,var(--primary),#ff7a2f)}
.links-head a{font-size:13px;color:var(--text-2);transition:color .25s}
.links-head a:hover{color:var(--primary)}
.links-list{display:flex;flex-wrap:wrap;gap:12px}
.links-list a{display:inline-flex;align-items:center;gap:7px;padding:9px 18px;border-radius:8px;background:#fff;border:1px solid #eaeff7;color:var(--text-2);font-size:13.5px;transition:all .28s}
.links-list a::before{content:"";width:5px;height:5px;border-radius:50%;background:#d5dce9;transition:background .28s}
.links-list a:hover{color:var(--primary);border-color:rgba(230,0,18,.28);background:#fff;transform:translateY(-3px);box-shadow:0 10px 22px rgba(24,24,28,.08)}
.links-list a:hover::before{background:var(--primary)}

/* ===================== 客服弹窗 & 浮动按钮 ===================== */
.float-service{position:fixed;right:24px;bottom:90px;z-index:900;width:56px;height:56px;border-radius:50%;background:linear-gradient(135deg,#2a2a2e,#0c0c0e);border:none;color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;box-shadow:0 8px 24px rgba(0,0,0,.35);transition:all .3s}
.float-service:hover{transform:scale(1.08)}
.modal-mask{position:fixed;inset:0;z-index:1200;background:rgba(5,10,25,.6);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;opacity:0;visibility:hidden;transition:all .3s}
.modal-mask.show{opacity:1;visibility:visible}
.modal{background:#fff;border-radius:16px;width:min(420px,92vw);overflow:hidden;transform:translateY(30px) scale(.96);transition:all .35s cubic-bezier(.2,.9,.3,1.2)}
.modal-mask.show .modal{transform:translateY(0) scale(1)}
.modal-head{background:linear-gradient(135deg,#26262b,#101013);color:#fff;padding:26px 28px;position:relative}
.modal-head h3{font-size:19px;font-weight:700}
.modal-head p{font-size:13px;opacity:.85;margin-top:4px}
.modal-close{position:absolute;top:16px;right:16px;background:rgba(255,255,255,.2);border:none;color:#fff;width:30px;height:30px;border-radius:50%;cursor:pointer;font-size:15px;transition:background .2s}
.modal-close:hover{background:rgba(255,255,255,.35)}
.modal-body{padding:26px 28px}
.service-item{display:flex;align-items:center;gap:14px;padding:13px 14px;border-radius:10px;transition:background .2s;cursor:pointer}
.service-item:hover{background:var(--bg-gray)}
.service-item .si-icon{width:42px;height:42px;border-radius:10px;display:flex;align-items:center;justify-content:center;color:#fff;flex-shrink:0}
.service-item b{display:block;font-size:14.5px}
.service-item span{font-size:13px;color:var(--text-2)}
.service-item .copy{margin-left:auto;font-size:12px;color:var(--primary);border:1px solid var(--primary);padding:3px 12px;border-radius:999px;background:none;cursor:pointer;font-family:inherit}
.service-item .copy:hover{background:var(--primary);color:#fff}
.modal-foot{padding:14px 28px 22px;text-align:center;font-size:12px;color:#9aa7ba}

/* ===================== 浅色几何背景 ===================== */
.geo{position:relative;overflow:hidden}
.geo>.container{position:relative;z-index:2}
.geo i{position:absolute;pointer-events:none;display:block;z-index:0}
.geo-dots{width:300px;height:300px;background-image:radial-gradient(rgba(24,24,28,.20) 2px,transparent 2.4px);background-size:22px 22px}
.geo-circle{border-radius:50%;border:70px solid rgba(24,24,28,.05)}
.geo-ring{border-radius:50%;border:1px solid rgba(24,24,28,.16)}
.geo-ring::after{content:"";position:absolute;inset:46px;border-radius:50%;border:1px dashed rgba(24,24,28,.12)}
.geo-blob{border-radius:50%;filter:blur(80px);opacity:.6}
.geo-sq{border:1px solid rgba(24,24,28,.15);transform:rotate(45deg);border-radius:6px}
.geo-cross{width:26px;height:26px;opacity:.4;background:linear-gradient(rgba(24,24,28,.5),rgba(24,24,28,.5)) center/100% 2px no-repeat,linear-gradient(rgba(24,24,28,.5),rgba(24,24,28,.5)) center/2px 100% no-repeat}
.geo-line{height:1px;background:linear-gradient(90deg,transparent,rgba(24,24,28,.18),transparent)}

/* ---------- 大区块：大面积几何背景 ---------- */
.mega{background:linear-gradient(180deg,#fcfcfd 0%,#f0f2f8 46%,#fbfcfd 100%)}
.mega::before,.mega::after{content:"";position:absolute;z-index:0;pointer-events:none}
.mega::before{left:-12%;top:-8%;width:72%;height:66%;background:linear-gradient(135deg,rgba(230,0,18,.085),rgba(255,122,47,.028) 55%,transparent 78%);transform:rotate(-15deg);border-radius:38% 62% 55% 45%/45% 55% 45% 55%;filter:blur(2px)}
.mega::after{right:-14%;bottom:-12%;width:70%;height:64%;background:linear-gradient(135deg,rgba(24,24,28,.075),rgba(24,24,28,.015) 52%,transparent 76%);transform:rotate(-13deg);border-radius:55% 45% 42% 58%/50% 42% 58% 50%;filter:blur(2px)}
.geo-doughnut{border-radius:50%;border:120px solid rgba(24,24,28,.045)}
.geo-arc{border-radius:50%;border:2px solid rgba(24,24,28,.11);clip-path:polygon(0 0,100% 0,100% 54%,0 54%)}
.geo-stripe{background:repeating-linear-gradient(45deg,rgba(24,24,28,.06) 0 2px,transparent 2px 20px)}
.geo-half{border-radius:999px 0 0 999px;border:1px solid rgba(24,24,28,.13)}
@keyframes driftY{0%,100%{transform:translateY(0)}50%{transform:translateY(-22px)}}
@keyframes driftSq{0%,100%{transform:translateY(0) rotate(45deg)}50%{transform:translateY(-18px) rotate(52deg)}}
.geo-float{animation:driftY 9s ease-in-out infinite}
.geo-sq.geo-float{animation:driftSq 11s ease-in-out infinite}
@media (max-width:768px){
  .geo-circle{border-width:44px}
  .geo-dots{width:180px;height:180px}
  .geo-doughnut{border-width:64px}
  .mega::before,.mega::after{filter:blur(0)}
  .mega::before{width:120%;height:30%;top:-5%;left:-22%}
  .mega::after{width:130%;height:32%;bottom:-6%;right:-28%}
}

/* ===================== 响应式 ===================== */
/* 中等宽度：主导航菜单较多时自动收紧，避免溢出（导航共 9 项，区间已放宽到 1440px） */
@media (min-width:1025px) and (max-width:1440px){
  .main-nav{gap:0}
  .main-nav a{padding:8px 7px;font-size:13.5px;letter-spacing:-.2px}
  .header-actions{gap:8px}
  .btn-ghost,.btn-solid{padding:8px 12px;font-size:13.5px}
  .nav-login{padding:0 14px;font-size:14px}
  .nav-service{font-size:14px;gap:6px}
  .logo-img{height:36px}
  .site-header .container{gap:12px}
}
@media (min-width:1441px){
  .main-nav{gap:4px}
  .main-nav a{padding:8px 11px}
}

@media (max-width:1024px){
  .product-grid{grid-template-columns:repeat(2,1fr)}
  .value-title{margin-top:80px}
  .value-wrap{grid-template-columns:160px 1fr}
  .value-panel-grid{grid-template-columns:repeat(2,1fr)}
  .value-stats{grid-template-columns:1fr;gap:32px;text-align:center;margin-top:44px}
  .value-stats-left h3{padding-left:0;font-size:24px}
  .value-stats-left h3::before{display:none}
  .value-stats-left p{padding-left:0;max-width:100%;margin-bottom:16px}
  .value-stats-left .btn{margin-left:0}
  .value-stats-grid{grid-template-columns:repeat(2,1fr);gap:26px}
  .value-stats-grid>div+div::before{display:none}
  .value-stats-grid>div:nth-child(even)::before{display:block}
  .feature-layout{grid-template-columns:1fr;gap:44px}
  .feature-visual{order:-1}
  .feature-visual .fx{width:200px}
  .news-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
  .promise .container{grid-template-columns:repeat(3,1fr);gap:32px 20px}
  .promise-item+.promise-item::before{display:none}
  .promise-item:not(:nth-child(3n+1))::before{display:block}
  .main-nav a{padding:8px 9px;font-size:14px}
}
@media (max-width:768px){
  .section{padding:60px 0}
  .section-title{font-size:25px}
  .hamburger{display:flex}
  .main-nav{position:fixed;top:var(--nav-h);left:0;right:0;flex-direction:column;align-items:stretch;background:rgba(8,15,32,.97);backdrop-filter:blur(14px);padding:14px 20px 22px;gap:2px;transform:translateY(-130%);transition:transform .35s ease;box-shadow:0 20px 40px rgba(0,0,0,.35)}
  .main-nav.open{transform:translateY(0)}
  .main-nav a{padding:13px 10px;font-size:15px;border-bottom:1px solid rgba(255,255,255,.06)}
  .site-header.scrolled .main-nav a{color:rgba(255,255,255,.88)}
  .site-header.scrolled .main-nav a:hover,.site-header.scrolled .main-nav a.active{color:#fff;background:rgba(255,255,255,.12)}

  /* 手机端子菜单：点击展开 */
  .nav-item{display:flex;flex-direction:column;align-items:stretch}
  .main-nav .nav-toggle{justify-content:space-between}
  .nav-item.open .nav-arrow{transform:rotate(180deg)}
  .sub-menu,.nav-item:hover .sub-menu{position:static;left:auto;top:auto;min-width:0;padding:0;max-height:0;overflow:hidden;background:transparent;border:none;border-radius:0;box-shadow:none;transform:none;opacity:1;visibility:visible;transition:max-height .34s ease}
  .sub-menu::before{display:none}
  .nav-item.open .sub-menu{max-height:300px;padding:4px 0 8px 12px}
  .main-nav .sub-menu a{padding:10px 10px;font-size:14px;color:rgba(255,255,255,.62);border-bottom:none}
  .main-nav .sub-menu a:hover{color:#fff;background:rgba(255,255,255,.08)}
  .header-actions .btn-ghost{display:none}
  .header-actions .btn-solid{padding:8px 14px;font-size:13px}
  .header-actions .nav-login{height:34px;padding:0 13px;font-size:13.5px}
  /* 在线客服：仅显示 QQ 图标 + “客服”两个字 */
  .header-actions .nav-service{font-size:13.5px;gap:6px}
  .header-actions .nav-service > span{display:none}
  .header-actions .nav-service::after{content:"客服"}
  .header-actions .nav-service .nav-qq{width:20px;height:20px}
  /* 登录后：仅显示用户图标，隐藏昵称、箭头与下拉菜单 */
  .header-actions .nav-user{font-size:13.5px;gap:6px;padding:0 3px}
  .header-actions .nav-username{display:none}
  .header-actions .nav-user .nav-arrow{display:none}
  .header-actions .nav-avatar{display:none}
  .header-actions .nav-user-ico{display:block}
  .header-actions .user-menu .sub-menu{display:none}
  .product-grid{grid-template-columns:1fr;gap:16px}
  .product-card{display:none}
  .product-card.active{display:flex}
  .product-subtabs{display:flex;gap:8px;overflow-x:auto;margin:-14px 0 18px;padding:6px;background:#f8fafc;border-radius:8px;scrollbar-width:none;-webkit-overflow-scrolling:touch}
  .product-subtabs::-webkit-scrollbar{display:none}
  .product-subtabs button{flex:0 0 auto;padding:6px 12px;background:transparent;border:none;border-radius:6px;font-weight:500;font-size:13px;color:#5a5f7a;cursor:pointer;transition:all .2s;white-space:nowrap;font-family:inherit}
  .product-subtabs button.active{background:#fff;color:var(--primary);box-shadow:0 4px 10px rgba(24,24,28,.08)}
  .product-tabs{justify-content:flex-start}
  .value-title{margin-top:60px}
  .value-wrap{display:flex;flex-direction:column}
  .value-sidebar{border-right:none;border-bottom:1px solid rgba(24,24,28,.06);padding:16px}
  .value-tabs{flex-direction:row;gap:8px;overflow-x:auto;scrollbar-width:none;-webkit-overflow-scrolling:touch}
  .value-tabs::-webkit-scrollbar{display:none}
  .value-tabs button{flex-shrink:0;white-space:nowrap;width:auto;padding:12px 24px;border:none;border-radius:40px 40px 0 0;background:transparent;color:#5a5f7a;font-size:15px;font-weight:600}
  .value-tabs button:hover{color:#1a1a2e;background:transparent}
  .value-tabs button.active{background:transparent;color:#1a1a2e}
  .value-tabs button.active::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--primary)}
  .value-tabs button::before{display:none}
  .value-panel-grid{grid-template-columns:repeat(2,1fr)}
  .vp-card{padding:22px 16px}
  .vp-visual{width:48px;height:48px;margin-bottom:14px}
  .vp-visual .vp-ico{width:26px;height:26px}
  .vp-card h4{font-size:15px}
  .vp-card .vp-desc{font-size:12px;margin-bottom:10px;min-height:auto}
  .vp-price{font-size:12px}
  .vp-price strong{font-size:20px}
  .vp-tags span{padding:4px 10px;font-size:11px}
  .value-stats{margin-top:36px;gap:26px}
  .value-stats-left h3{font-size:22px}
  .value-stats-left p{font-size:14px;margin-bottom:16px}
  .value-stats-grid{gap:22px}
  .value-stats-grid .stat-num{font-size:36px}
  .value-stats-grid p{font-size:12.5px;margin-top:6px}
  .news-tabs{display:flex;gap:10px;overflow-x:auto;margin-bottom:22px;scrollbar-width:none;-webkit-overflow-scrolling:touch}
  .news-tabs::-webkit-scrollbar{display:none}
  .news-tabs button{white-space:nowrap;padding:10px 20px;border-radius:999px;border:1px solid #e3e9f4;background:#fff;color:var(--text-2);font-size:14px;font-weight:600;cursor:pointer;transition:all .25s;font-family:inherit}
  .news-tabs button.active{background:#1c1c1e;border-color:#1c1c1e;color:#fff}
  .news-col{display:none;padding:22px 20px}
  .news-col.active{display:block}
  .news-col header{justify-content:flex-end;padding-bottom:12px;margin-bottom:14px}
  .news-col h3{display:none}
  .feature-showcase{padding:70px 0}
  .feature-header{margin-bottom:30px}
  .feature-tabs{flex-wrap:nowrap;justify-content:flex-start;gap:20px;margin-bottom:36px;overflow-x:auto;scrollbar-width:none;-webkit-overflow-scrolling:touch}
  .feature-tabs::-webkit-scrollbar{display:none}
  .feature-tabs::before,.feature-tabs::after{content:"";margin:auto;flex-shrink:0}
  .feature-tabs button{white-space:nowrap;flex-shrink:0;font-size:14px;padding:6px 0 10px;gap:6px}
  .feature-tabs .tab-ico{width:16px;height:16px}
  .feature-layout{gap:32px}
  .feature-main h3{font-size:22px}
  .feature-desc{font-size:13px}
  .feature-tags span{padding:6px 12px;font-size:12px}
  .feature-visual .fx{width:160px}
  .biz-grid{grid-template-columns:1fr}
  .promise{padding:40px 0}
  .promise .container{grid-template-columns:repeat(2,1fr);gap:26px 12px}
  .promise-item+.promise-item::before{display:none}
  .promise-item:nth-child(even)::before{display:block}
  .promise-icon{width:42px;height:42px;border-radius:12px}
  .promise-item b{font-size:19px}
  .promise-label{font-size:12px}
  .footer-top{flex-direction:column;align-items:flex-start;gap:22px;padding:36px 0 30px}
  .footer-cta h3{font-size:21px;margin-bottom:8px}
  .footer-cta p{font-size:13px;line-height:1.8}
  .footer-actions{width:100%}
  .footer-actions .btn{flex:1;min-width:140px;justify-content:center}
  .footer-grid{grid-template-columns:1fr;gap:0;padding:34px 0 30px}
  .footer-desc{max-width:100%}
  .footer-brand{padding-bottom:26px}
  /* .footer-contact{padding-top:26px} */

  /* 页脚标题：灰线 + 手机端折叠 */
  .footer-col h4{margin-bottom:0;padding:15px 0;font-size:14.5px}
  .footer-col h4::after{left:0;right:0;width:auto;height:1px;background:rgba(255,255,255,.14);border-radius:0}
  .footer-contact h4{margin-bottom:18px}
  .footer-nav h4{display:flex;align-items:center;justify-content:space-between;gap:12px;cursor:pointer;user-select:none;-webkit-tap-highlight-color:transparent}
  .footer-nav .fc-arrow{display:flex;color:rgba(255,255,255,.55);transition:transform .3s,color .3s}
  .footer-nav.open .fc-arrow{transform:rotate(180deg);color:var(--primary)}
  .footer-nav ul{max-height:0;overflow:hidden;opacity:0;transition:max-height .38s ease,opacity .3s ease}
  .footer-nav.open ul{max-height:420px;opacity:1;padding:12px 0 18px}
  .footer-nav:first-of-type h4{border-top:1px solid rgba(255,255,255,.14)}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:12px;padding:20px 0 28px}
  .footer-links{gap:16px}
  .links-section{padding:34px 0}
  .links-head{margin-bottom:16px}
  .links-list{gap:8px}
  .links-list a{padding:8px 14px;font-size:13px}
  .hero-arrow{display:none}
  .slide-points{gap:14px;font-size:13px}
  .float-service{right:16px;bottom:76px}
  .scroll-hint{display:none}
}