/* ============================================================
   卡速网控制端 · 重新设计样式
   配色：白 + 蓝，清爽高级，移动端自适应
   ============================================================ */

:root{
  --blue-700:#1D4ED8;
  --blue-600:#2563EB;
  --blue-500:#3B82F6;
  --blue-400:#60A5FA;
  --blue-300:#93C5FD;
  --navy:#0B1B3F;
  --ink:#1F2937;
  --muted:#64748B;
  --bg:#FFFFFF;
  --bg-soft:#F4F8FF;
  --bg-tint:#EAF1FF;
  --border:#E6ECF5;
  --white:#fff;

  --grad-primary:linear-gradient(135deg,#3B82F6 0%,#1D4ED8 100%);
  --grad-soft:linear-gradient(135deg,#EAF1FF 0%,#F4F8FF 100%);

  --shadow-sm:0 2px 10px rgba(37,99,235,.06);
  --shadow:0 12px 40px rgba(37,99,235,.12);
  --shadow-lg:0 24px 60px rgba(13,40,90,.18);

  --radius:18px;
  --radius-sm:12px;
  --maxw:1180px;
  --nav-h:72px;

  --font:"Inter","Noto Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font);
  color:var(--ink);
  background:var(--bg);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
ul{list-style:none}

.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}

.grad-text{
  background:var(--grad-primary);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;color:transparent;
}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-weight:600;font-size:15px;border-radius:999px;
  padding:13px 26px;cursor:pointer;border:1.5px solid transparent;
  transition:transform .25s ease,box-shadow .25s ease,background .25s ease,color .25s;
  white-space:nowrap;
}
.btn--sm{padding:9px 18px;font-size:14px}
.btn--lg{padding:15px 32px;font-size:16px}
.btn--primary{background:var(--grad-primary);color:#fff;box-shadow:var(--shadow)}
.btn--primary:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}
.btn--outline{border-color:var(--blue-300);color:var(--blue-700);background:#fff}
.btn--outline:hover{border-color:var(--blue-500);background:var(--bg-tint);transform:translateY(-2px)}
.btn--ghost{color:var(--blue-700);background:transparent}
.btn--ghost:hover{background:var(--bg-tint)}
.btn--light{background:#fff;color:var(--blue-700)}
.btn--light:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(255,255,255,.3)}

/* ============ 导航 ============ */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:100;height:var(--nav-h);
  display:flex;align-items:center;
  background:rgba(255,255,255,.72);
  backdrop-filter:saturate(180%) blur(14px);
  -webkit-backdrop-filter:saturate(180%) blur(14px);
  border-bottom:1px solid transparent;
  transition:border-color .3s,box-shadow .3s,background .3s;
}
.nav.is-scrolled{border-color:var(--border);box-shadow:var(--shadow-sm);background:rgba(255,255,255,.9)}
.nav__inner{display:flex;align-items:center;justify-content:space-between;width:100%}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;color:var(--navy)}
.brand__mark{display:flex;filter:drop-shadow(0 4px 10px rgba(37,99,235,.35))}
.brand__text em{font-style:normal;color:var(--blue-600);font-weight:700;margin-left:2px}
.brand--light{color:#fff}
.brand--light .brand__text em{color:var(--blue-300)}
/* 前台仅保留 Logo 图标，隐藏文字（导航与底部统一生效） */
.brand__text{display:none}
/* 放大前台 Logo 图标（覆盖内联 SVG 尺寸） */
.brand__mark svg,.brand__mark img{height:40px;width:auto}
.brand--light .brand__mark svg,.brand--light .brand__mark img{height:38px;width:auto}

.nav__links{display:flex;gap:30px}
.nav__links a{font-size:15px;font-weight:500;color:var(--ink);position:relative;padding:6px 0;transition:color .2s}
.nav__links a::after{content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--grad-primary);border-radius:2px;transition:width .25s}
.nav__links a:hover{color:var(--blue-700)}
.nav__links a:hover::after{width:100%}

.nav__actions{display:flex;align-items:center;gap:12px}

/* 登录态：头像 + 用户名 */
.nav-user{display:inline-flex;align-items:center;gap:9px;padding:5px 14px 5px 6px;border-radius:999px;background:var(--bg-tint);border:1px solid var(--border);text-decoration:none;transition:background .2s,box-shadow .2s}
.nav-user:hover{background:#fff;box-shadow:var(--shadow-sm)}
.nav-user__avatar{width:30px;height:30px;border-radius:50%;background:var(--grad-primary);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:14px;flex:none}
.nav-user__name{font-size:14px;font-weight:600;color:var(--navy);max-width:120px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.nav__toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.nav__toggle span{width:24px;height:2.4px;background:var(--navy);border-radius:2px;transition:.3s}
.nav__toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7.4px) rotate(45deg)}
.nav__toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav__toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7.4px) rotate(-45deg)}

/* ============ HERO ============ */
.hero{position:relative;padding:calc(var(--nav-h) + 70px) 0 90px;background:
  radial-gradient(1200px 600px at 85% -10%,rgba(59,130,246,.18),transparent 60%),
  radial-gradient(900px 500px at -10% 20%,rgba(147,197,253,.22),transparent 55%),
  var(--bg);
  overflow:hidden;
}
.hero__glow{position:absolute;border-radius:50%;filter:blur(60px);opacity:.5;pointer-events:none}
.hero__glow--1{width:380px;height:380px;background:rgba(37,99,235,.25);top:-60px;right:8%}
.hero__glow--2{width:300px;height:300px;background:rgba(96,165,250,.3);bottom:-40px;left:4%}
.hero__inner{display:grid;grid-template-columns:1.05fr .95fr;gap:54px;align-items:center}

.pill{display:inline-flex;align-items:center;gap:8px;background:var(--bg-tint);color:var(--blue-700);
  font-weight:600;font-size:13.5px;padding:7px 15px;border-radius:999px;border:1px solid #d7e6ff}
.pill__dot{width:8px;height:8px;border-radius:50%;background:var(--blue-500);box-shadow:0 0 0 4px rgba(59,130,246,.18)}

.hero__title{font-size:clamp(34px,5vw,56px);line-height:1.12;font-weight:800;color:var(--navy);margin:20px 0 18px;letter-spacing:-.5px}
.hero__sub{font-size:clamp(15px,1.6vw,18px);color:var(--muted);max-width:520px}
.hero__cta{display:flex;gap:14px;margin:30px 0 36px;flex-wrap:wrap}
.hero__trust{display:flex;gap:38px;flex-wrap:wrap}
.hero__trust li{display:flex;flex-direction:column}
.hero__trust strong{font-size:28px;font-weight:800;color:var(--navy);font-family:var(--font)}
.hero__trust span{font-size:13.5px;color:var(--muted);margin-top:2px}

/* HERO 产品示意卡 */
.hero__visual{position:relative}
.mock{background:#fff;border:1px solid var(--border);border-radius:22px;box-shadow:var(--shadow-lg);overflow:hidden;transform:perspective(1400px) rotateY(-9deg) rotateX(3deg);transition:transform .5s ease}
.mock__bar{display:flex;align-items:center;gap:7px;padding:14px 16px;background:var(--bg-soft);border-bottom:1px solid var(--border)}
.mock__bar span{width:11px;height:11px;border-radius:50%;background:#cdd9ee}
.mock__bar span:nth-child(1){background:#ff6058}
.mock__bar span:nth-child(2){background:#ffbe2f}
.mock__bar span:nth-child(3){background:#2bca45}
.mock__bar em{margin-left:8px;font-style:normal;font-size:13px;color:var(--muted);font-weight:600}
.mock__body{padding:20px;display:flex;flex-direction:column;gap:14px;background:linear-gradient(180deg,#fff,#f7faff)}
.mock__row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.mock__card{background:var(--bg-soft);border:1px solid var(--border);border-radius:14px;padding:14px 16px;display:flex;flex-direction:column;gap:4px}
.mock__card--blue{background:var(--grad-primary);border:0;color:#fff}
.mock__card--blue span{color:#000;font-weight:700;font-size:13.5px}
.mock__card--blue b{color:#000}
.mock__card span{font-size:12.5px;color:var(--muted)}
.mock__card b{font-size:20px;font-weight:800;color:var(--navy)}
.mock__card i{font-style:normal;font-size:12px;color:var(--muted)}
.mock__card i.up{color:#16a34a;font-weight:600}
.mock__card b.ok{color:#16a34a;font-size:16px}
.mock__chart{display:flex;align-items:flex-end;gap:10px;height:90px;padding:6px 4px 0;border-top:1px dashed var(--border);margin-top:2px}
.mock__chart .bar{flex:1;background:var(--grad-primary);border-radius:6px 6px 3px 3px;opacity:.85;animation:grow 1.4s ease both}
.mock__chart .bar:nth-child(2){animation-delay:.1s}
.mock__chart .bar:nth-child(3){animation-delay:.2s}
.mock__chart .bar:nth-child(4){animation-delay:.3s}
.mock__chart .bar:nth-child(5){animation-delay:.4s}
.mock__chart .bar:nth-child(6){animation-delay:.5s}
.mock__chart .bar:nth-child(7){animation-delay:.6s}
@keyframes grow{from{transform:scaleY(0);transform-origin:bottom}to{transform:scaleY(1)}}

.float-chip{position:absolute;background:#fff;border:1px solid var(--border);box-shadow:var(--shadow);
  font-size:13px;font-weight:600;color:var(--navy);padding:9px 14px;border-radius:12px;animation:float 3.5s ease-in-out infinite}
.float-chip--1{top:8%;right:-6%}
.float-chip--2{bottom:10%;left:-8%}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}

/* ============ 通用区块 ============ */
.section{padding:96px 0}
.section--soft{background:var(--bg-soft)}
.section__head{text-align:center;max-width:680px;margin:0 auto 54px}
.eyebrow{display:inline-block;font-size:13px;font-weight:700;letter-spacing:1.5px;text-transform:uppercase;color:var(--blue-600);background:var(--bg-tint);padding:6px 14px;border-radius:999px;margin-bottom:16px}
.eyebrow--light{background:rgba(255,255,255,.18);color:#fff}
.section__title{font-size:clamp(26px,3.4vw,38px);font-weight:800;color:var(--navy);letter-spacing:-.4px}
.section__lead{color:var(--muted);font-size:16px;margin-top:14px}

/* 系统特性 */
.sys-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.sys-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:28px 24px;
  transition:transform .3s,box-shadow .3s,border-color .3s}
.sys-card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:var(--blue-300)}
.sys-card__ico{width:54px;height:54px;border-radius:14px;background:var(--grad-soft);display:flex;align-items:center;justify-content:center;font-size:26px;margin-bottom:16px;border:1px solid #dcebff}
.sys-card h3{font-size:18px;color:var(--navy);margin-bottom:8px}
.sys-card p{color:var(--muted);font-size:14.5px}

/* 核心优势 */
.adv-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.adv-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:28px 24px;position:relative;overflow:hidden;
  transition:transform .3s,box-shadow .3s}
.adv-card::before{content:"";position:absolute;inset:0 0 auto 0;height:4px;background:var(--grad-primary);transform:scaleX(0);transform-origin:left;transition:transform .35s}
.adv-card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.adv-card:hover::before{transform:scaleX(1)}
.adv-card__ico{width:50px;height:50px;border-radius:13px;background:var(--bg-tint);display:flex;align-items:center;justify-content:center;font-size:24px;margin-bottom:14px}
.adv-card h3{font-size:17px;color:var(--navy);margin-bottom:8px}
.adv-card p{color:var(--muted);font-size:14px}

/* 解决方案 */
.sol-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.sol-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:30px 26px;position:relative;
  transition:transform .3s,box-shadow .3s}
.sol-card--wide{grid-column:span 1}
.sol-card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:var(--blue-300)}
.sol-card__num{font-size:15px;font-weight:800;color:var(--blue-500);background:var(--bg-tint);width:42px;height:42px;border-radius:12px;display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.sol-card h3{font-size:20px;color:var(--navy);margin-bottom:10px}
.sol-card p{color:var(--muted);font-size:14.5px}

/* ============ 商业授权 ============ */
.license{background:var(--grad-primary);border-radius:28px;padding:60px;display:grid;grid-template-columns:1.3fr .7fr;gap:40px;align-items:center;position:relative;overflow:hidden;box-shadow:var(--shadow-lg)}
.license::after{content:"";position:absolute;width:420px;height:420px;border-radius:50%;background:rgba(255,255,255,.08);top:-160px;right:-120px}
.license__title{font-size:clamp(26px,3vw,36px);font-weight:800;color:#fff;margin:14px 0 14px}
.license__desc{color:rgba(255,255,255,.9);font-size:16px;max-width:520px}
.license__list{margin:22px 0 28px;display:grid;gap:10px}
.license__list li{color:#fff;font-weight:500;font-size:15px}
.license__visual{position:relative;z-index:1;display:flex;justify-content:center}
.price-card{background:#fff;border-radius:20px;padding:30px 28px;width:100%;max-width:280px;text-align:center;box-shadow:var(--shadow-lg);position:relative}
.price-card__tag{position:absolute;top:-12px;left:50%;transform:translateX(-50%);background:var(--grad-primary);color:#fff;font-size:12px;font-weight:700;padding:5px 14px;border-radius:999px}
.price-card h4{font-size:17px;color:var(--navy);margin-bottom:14px}
.price-card__price{font-size:34px;font-weight:800;color:var(--blue-700)}
.price-card__price span{font-size:16px;color:var(--muted);font-weight:600}
.price-card p{color:var(--muted);font-size:13.5px;margin-top:8px}
.price-card__line{height:1px;background:var(--border);margin:18px 0}
.price-card__note{font-size:13px;color:var(--blue-700);font-weight:600}

/* ============ CTA band ============ */
.cta-band{background:var(--bg-soft);padding:0 0 90px}
.cta-band__inner{background:#fff;border:1px solid var(--border);border-radius:24px;padding:54px 40px;text-align:center;box-shadow:var(--shadow);
  background-image:radial-gradient(700px 300px at 50% -40%,rgba(59,130,246,.12),transparent 60%)}
.cta-band h2{font-size:clamp(24px,3vw,34px);color:var(--navy);font-weight:800}
.cta-band p{color:var(--muted);margin:12px 0 26px;font-size:16px}

/* ============ 页脚 ============ */
.footer{background:var(--navy);color:#cdd9ee;padding:64px 0 0}
.footer__inner{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px;padding-bottom:48px}
.footer__brand p{margin-top:16px;font-size:14px;color:#9fb2d4;max-width:300px}
.footer__col h5{color:#fff;font-size:15px;margin-bottom:16px;font-weight:700}
.footer__col a{display:block;font-size:14px;color:#9fb2d4;margin-bottom:11px;transition:color .2s}
.footer__col a:hover{color:var(--blue-300)}
.footer__muted{font-size:13px;color:#7e93ba;display:block;margin-top:6px}
.footer__bottom{border-top:1px solid rgba(255,255,255,.08);padding:20px 0;font-size:13px;color:#7e93ba}
.footer__bottom .container{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}

/* ============ 滚动揭示动画 ============ */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s ease}
.reveal.is-visible{opacity:1;transform:none}

/* ============ 响应式 ============ */
@media (max-width:1024px){
  .hero__inner{grid-template-columns:1fr;gap:40px}
  .hero__visual{order:-1;max-width:520px;margin:0 auto}
  .mock{transform:none}
  .sys-grid,.adv-grid{grid-template-columns:repeat(2,1fr)}
  .sol-grid{grid-template-columns:repeat(2,1fr)}
  .license{grid-template-columns:1fr;padding:44px}
  .footer__inner{grid-template-columns:1fr 1fr}
}

@media (max-width:760px){
  .nav__links{
    position:fixed;top:var(--nav-h);left:0;right:0;
    flex-direction:column;gap:0;background:#fff;
    border-bottom:1px solid var(--border);box-shadow:var(--shadow);
    padding:8px 24px 18px;
    transform:translateY(-12px);opacity:0;pointer-events:none;transition:.3s;
  }
  .nav__links.is-open{transform:none;opacity:1;pointer-events:auto}
  .nav__links a{padding:14px 0;border-bottom:1px solid var(--border);font-size:16px}
  .nav__links a::after{display:none}
  .nav__actions{display:none}
  .nav__toggle{display:flex}
  .section{padding:64px 0}
  .hero{padding:calc(var(--nav-h) + 40px) 0 60px}
  .hero__cta .btn{flex:1;justify-content:center}
  .hero__trust{gap:24px}
  .sys-grid,.adv-grid,.sol-grid{grid-template-columns:1fr}
  .float-chip{display:none}
  .license{padding:34px 24px}
  .footer__inner{grid-template-columns:1fr}
  .cta-band__inner{padding:40px 22px}
  .mock{transform:none}
}

@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}