:root{
  --ink:#1b1226;
  --sub:#544a68;
  --muted:#7b6f8d;
  --line:#f2e5dd;
  --pink:#ff3d6e;
  --orange:#ff7a3d;
  --violet:#6d28d9;
  --mint:#00b08a;
  --card:#ffffff;
  --radius:18px;
  --shadow-sm:0 6px 18px rgba(27,18,38,.06);
  --shadow-md:0 18px 42px rgba(27,18,38,.11);
  --grad:linear-gradient(120deg,#ff3d6e 0%,#ff7a3d 100%);
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.7;
  color:var(--ink);
  background-color:#fffaf6;
  background-image:
    radial-gradient(900px 520px at 6% -8%, rgba(255,122,61,.22), rgba(255,122,61,0) 62%),
    radial-gradient(760px 460px at 96% 2%, rgba(255,61,110,.20), rgba(255,61,110,0) 60%),
    radial-gradient(900px 560px at 50% 46%, rgba(109,40,217,.10), rgba(109,40,217,0) 66%),
    radial-gradient(820px 520px at 8% 82%, rgba(0,176,138,.12), rgba(0,176,138,0) 66%),
    radial-gradient(760px 480px at 92% 96%, rgba(255,122,61,.14), rgba(255,122,61,0) 64%);
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none;}
img{display:block;max-width:100%;}
ul{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;line-height:1.25;letter-spacing:-.01em;}
p{margin:0;}
button{font-family:inherit;}
section[id]{scroll-margin-top:88px;}
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 22px;}
.section{padding:72px 0;}
.section-head{max-width:780px;margin:0 auto 40px;text-align:center;}
.section-head.left{margin-left:0;text-align:left;}
.kicker{
  display:inline-flex;align-items:center;
  padding:6px 15px;border-radius:999px;
  font-size:13px;font-weight:700;letter-spacing:.05em;
  color:#b3243f;
  background:linear-gradient(120deg,rgba(255,61,110,.13),rgba(255,122,61,.15));
  border:1px solid rgba(255,122,61,.3);
}
.section-title{font-size:clamp(24px,3.4vw,34px);font-weight:800;margin-top:16px;}
.section-desc{margin-top:14px;color:var(--sub);font-size:16px;}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 26px;border-radius:999px;border:1.5px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;
  transition:transform .25s ease,box-shadow .25s ease,background .25s ease,border-color .25s ease;
}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 12px 26px rgba(255,61,110,.28);}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 34px rgba(255,61,110,.38);}
.btn-primary:active{transform:translateY(0);box-shadow:0 8px 18px rgba(255,61,110,.3);}
.btn-ghost{background:#fff;color:var(--ink);border-color:#f0dcd2;}
.btn-ghost:hover{transform:translateY(-2px);border-color:var(--pink);color:#c81f45;box-shadow:var(--shadow-sm);}

/* 导航 */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(255,250,246,.95);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid rgba(242,229,221,.95);
}
.nav-bar{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:68px;position:relative;}
.brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:800;flex-shrink:0;}
.brand img{width:34px;height:34px;object-fit:contain;border-radius:9px;}
.main-nav{display:flex;align-items:center;}
.nav-links{display:flex;align-items:center;gap:0;}
.nav-links a{
  display:block;padding:9px 12px;border-radius:10px;
  font-size:15px;font-weight:500;color:var(--sub);white-space:nowrap;
  transition:color .2s ease,background .2s ease;
}
.nav-links a:hover{color:#c81f45;background:rgba(255,61,110,.09);}
.nav-cta{margin-left:16px;padding:10px 22px;font-size:14.5px;flex-shrink:0;}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;
  border:1px solid var(--line);background:#fff;cursor:pointer;
  align-items:center;justify-content:center;flex-direction:column;gap:5px;
}
.nav-toggle span{display:block;width:20px;height:2px;border-radius:2px;background:var(--ink);transition:transform .25s ease,opacity .25s ease;}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* Hero */
.hero{padding:60px 0 56px;}
.hero-grid{display:grid;grid-template-columns:1.18fr .82fr;gap:42px;align-items:start;}
.hero h1{font-size:clamp(29px,4.4vw,46px);font-weight:900;letter-spacing:-.02em;margin-top:20px;}
.hero h1 .hl{color:#e0284f;}
.hero-sub{margin-top:18px;font-size:16.5px;color:var(--sub);max-width:620px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
.hero-points{display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:28px;}
.hero-points li{display:flex;align-items:center;gap:7px;font-size:14px;font-weight:500;color:var(--sub);}
.hero-points li::before{content:"✓";color:var(--pink);font-weight:900;}
.hero-panel{
  position:relative;overflow:hidden;
  padding:26px;border-radius:24px;
  background:linear-gradient(160deg,#ffffff 0%,#fff3ec 100%);
  border:1px solid var(--line);
  box-shadow:var(--shadow-md);
}
.hero-panel::after{
  content:"";position:absolute;right:-60px;top:-60px;width:180px;height:180px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,61,110,.28),rgba(255,61,110,0) 70%);
  animation:pulseGlow 6s ease-in-out infinite;
}
@keyframes pulseGlow{0%,100%{transform:scale(1);opacity:.75;}50%{transform:scale(1.18);opacity:1;}}
.panel-label{font-size:13px;font-weight:700;letter-spacing:.08em;color:#b3243f;}
.panel-score{font-size:46px;font-weight:900;letter-spacing:-.03em;color:#e0284f;line-height:1.1;margin-top:4px;position:relative;z-index:1;}
.panel-score small{font-size:16px;font-weight:700;color:var(--muted);margin-left:2px;}
.stars{color:#ff9f1c;font-size:19px;letter-spacing:5px;line-height:1;}
.panel-block{margin-top:22px;padding-top:20px;border-top:1px dashed #eeddd3;position:relative;z-index:1;}
.panel-title{font-size:15px;font-weight:700;color:var(--ink);}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px;}
.chips span{
  padding:5px 12px;border-radius:999px;font-size:13px;font-weight:500;
  color:#5c4a52;background:rgba(255,255,255,.94);border:1px solid #f2ddd2;
  transition:transform .2s ease,border-color .2s ease,color .2s ease;
}
.chips span:hover{transform:translateY(-2px);border-color:var(--pink);color:#c81f45;}
.panel-list{margin-top:12px;}
.panel-list li{position:relative;padding-left:18px;margin-top:9px;font-size:14px;color:var(--sub);}
.panel-list li::before{
  content:"";position:absolute;left:0;top:9px;width:8px;height:8px;border-radius:50%;
  background:var(--grad);
}
.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:46px;}
.metric{
  padding:20px 22px;border-radius:16px;background:rgba(255,255,255,.88);
  border:1px solid var(--line);box-shadow:var(--shadow-sm);
  transition:transform .25s ease,box-shadow .25s ease;
}
.metric:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);}
.metric .num{font-size:27px;font-weight:900;letter-spacing:-.02em;line-height:1.2;}
.metric:nth-child(1) .num{color:#e0284f;}
.metric:nth-child(2) .num{color:#e8722a;}
.metric:nth-child(3) .num{color:#6d28d9;}
.metric:nth-child(4) .num{color:#008f72;}
.metric .label{font-size:14px;color:var(--sub);margin-top:4px;}

/* 卡片 */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;align-items:stretch;}
.card{
  padding:24px;border-radius:var(--radius);
  background:var(--card);border:1px solid var(--line);
  box-shadow:var(--shadow-sm);
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.card:hover{transform:translateY(-5px);box-shadow:var(--shadow-md);border-color:rgba(255,61,110,.32);}
.card .ico{
  width:38px;height:38px;border-radius:12px;margin-bottom:14px;
  display:flex;align-items:center;justify-content:center;
  font-size:14px;font-weight:800;color:#fff;background:var(--grad);
  letter-spacing:.02em;
}
.card h3{font-size:17.5px;font-weight:700;}
.card p{margin-top:8px;font-size:14.5px;color:var(--sub);}

/* 流程 */
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:16px;}
.step{
  padding:22px 18px;border-radius:16px;background:#fff;
  border:1px solid var(--line);box-shadow:var(--shadow-sm);
  transition:transform .25s ease,box-shadow .25s ease;
}
.step:hover{transform:translateY(-5px);box-shadow:var(--shadow-md);}
.step .no{
  display:inline-flex;align-items:center;justify-content:center;
  width:32px;height:32px;border-radius:10px;margin-bottom:12px;
  font-size:13px;font-weight:800;color:#fff;background:var(--grad);
}
.step h3{font-size:16px;font-weight:700;}
.step p{margin-top:8px;font-size:14px;color:var(--sub);}

/* 行业方案 */
.industry-list{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;}
.industry{
  display:flex;gap:16px;padding:20px 22px;border-radius:14px;
  background:rgba(255,255,255,.9);border:1px solid var(--line);border-left:4px solid var(--pink);
  box-shadow:var(--shadow-sm);
  transition:transform .25s ease,box-shadow .25s ease,border-left-color .25s ease;
}
.industry:nth-child(2){border-left-color:var(--orange);}
.industry:nth-child(3){border-left-color:var(--violet);}
.industry:nth-child(4){border-left-color:var(--mint);}
.industry:nth-child(5){border-left-color:#e0284f;}
.industry:nth-child(6){border-left-color:#e8722a;}
.industry:hover{transform:translateX(4px);box-shadow:var(--shadow-md);}
.industry h3{font-size:16.5px;font-weight:700;flex-shrink:0;}
.industry p{font-size:14.5px;color:var(--sub);}

/* 服务网络 */
.network-panel{
  display:grid;grid-template-columns:.9fr 1.1fr;gap:28px;align-items:start;
  padding:30px;border-radius:22px;
  background:linear-gradient(150deg,#fff 0%,#fff5ef 100%);
  border:1px solid var(--line);box-shadow:var(--shadow-md);
}
.network-main h3{font-size:22px;font-weight:800;}
.network-main p{margin-top:12px;font-size:15px;color:var(--sub);}
.network-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;}
.network-grid li{
  padding:16px 18px;border-radius:14px;background:#fff;
  border:1px solid var(--line);transition:transform .25s ease,box-shadow .25s ease;
}
.network-grid li:hover{transform:translateY(-3px);box-shadow:var(--shadow-sm);}
.network-grid strong{display:block;font-size:15px;font-weight:700;}
.network-grid span{display:block;margin-top:4px;font-size:13.5px;color:var(--muted);}

/* 案例 */
.gallery{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px;}
.shot{
  margin:0;border-radius:16px;overflow:hidden;background:#fff;
  border:1px solid var(--line);box-shadow:var(--shadow-sm);
  transition:transform .3s ease,box-shadow .3s ease;
}
.shot:hover{transform:translateY(-6px);box-shadow:var(--shadow-md);}
.shot .thumb{aspect-ratio:4/3;background:#fff7f2;padding:10px;}
.shot .thumb img{width:100%;height:100%;object-fit:contain;}
.shot figcaption{padding:14px 16px;font-size:14.5px;font-weight:600;border-top:1px solid var(--line);}

/* 对比评测 */
.score-card{
  display:grid;grid-template-columns:auto 1fr;gap:30px;align-items:center;
  padding:30px;border-radius:22px;margin-bottom:26px;
  background:linear-gradient(135deg,#fff 0%,#fff3ec 100%);
  border:1px solid var(--line);box-shadow:var(--shadow-md);
}
.score-num{font-size:58px;font-weight:900;letter-spacing:-.04em;line-height:1;color:#e0284f;}
.score-num small{font-size:18px;font-weight:700;color:var(--muted);margin-left:2px;letter-spacing:0;}
.score-info h3{font-size:20px;font-weight:800;margin-top:6px;}
.score-info p{margin-top:8px;font-size:14.5px;color:var(--sub);}
.table-wrap{
  overflow-x:auto;border-radius:18px;background:#fff;
  border:1px solid var(--line);box-shadow:var(--shadow-sm);
}
table{width:100%;border-collapse:collapse;min-width:720px;}
th,td{padding:14px 18px;text-align:left;font-size:14.5px;border-bottom:1px solid var(--line);vertical-align:top;}
th{
  font-weight:700;color:var(--ink);
  background:linear-gradient(120deg,rgba(255,61,110,.10),rgba(255,122,61,.12));
  white-space:nowrap;
}
tbody tr:last-child td{border-bottom:none;}
tbody tr:hover{background:#fff8f4;}
td:first-child{font-weight:700;white-space:nowrap;}
.hl-col{color:#c81f45;font-weight:700;}

/* 评测卡片组 */
.review{background:#fff;border:1px solid var(--line);border-radius:18px;padding:24px;box-shadow:var(--shadow-sm);transition:transform .25s ease,box-shadow .25s ease;}
.review:hover{transform:translateY(-5px);box-shadow:var(--shadow-md);}
.review .quote{font-size:14.5px;color:var(--sub);}
.review .who{display:flex;align-items:center;gap:12px;margin-top:18px;padding-top:16px;border-top:1px dashed #f0ddd4;}
.avatar{
  width:40px;height:40px;border-radius:50%;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;
  font-size:15px;font-weight:800;color:#fff;background:var(--grad);
}
.who-meta strong{display:block;font-size:14.5px;font-weight:700;}
.who-meta span{display:block;font-size:13px;color:var(--muted);}
.review .rstars{color:#ff9f1c;letter-spacing:3px;font-size:14px;margin-bottom:10px;}

/* 帮助与资讯 */
.wiki-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:start;}
.panel-box{
  padding:26px;border-radius:20px;background:#fff;
  border:1px solid var(--line);box-shadow:var(--shadow-sm);
}
.panel-box h3{font-size:18px;font-weight:800;}
.panel-box + .panel-box{margin-top:20px;}
.tag-cloud{display:flex;flex-wrap:wrap;gap:9px;margin-top:16px;}
.tag-cloud span{
  padding:6px 13px;border-radius:999px;font-size:13.5px;font-weight:500;
  color:#5c4a52;background:#fff7f3;border:1px solid #f4e2d9;
  transition:transform .2s ease,color .2s ease,border-color .2s ease,background .2s ease;
}
.tag-cloud span:hover{transform:translateY(-2px);color:#c81f45;border-color:var(--pink);background:#fff;}
.help-list{margin-top:16px;display:grid;gap:10px;}
.help-list li{
  display:flex;align-items:baseline;gap:10px;
  font-size:14.5px;color:var(--sub);
  padding:11px 14px;border-radius:12px;background:#fff8f4;border:1px solid #f6e6dd;
}
.help-list b{color:var(--ink);font-weight:700;flex-shrink:0;}
.article-list{margin-top:16px;display:grid;gap:10px;}
.article-list a{
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  padding:13px 16px;border-radius:12px;font-size:14.5px;font-weight:500;
  background:#fff8f4;border:1px solid #f6e6dd;color:var(--ink);
  transition:transform .2s ease,color .2s ease,border-color .2s ease,background .2s ease;
}
.article-list a:hover{transform:translateX(4px);color:#c81f45;border-color:rgba(255,61,110,.4);background:#fff;}
.article-list a::after{content:"→";color:var(--pink);font-weight:700;}
.article-widget{
  margin-top:16px;padding:16px;border-radius:12px;
  background:#fff8f4;border:1px dashed #f0d8cb;
  font-size:14px;color:var(--muted);
}

/* FAQ */
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:14px;
  margin-bottom:12px;overflow:hidden;
  transition:border-color .25s ease,box-shadow .25s ease;
}
.faq-item:hover{border-color:rgba(255,61,110,.35);}
.faq-item.open{box-shadow:var(--shadow-sm);border-color:rgba(255,61,110,.4);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 20px;border:none;background:none;cursor:pointer;text-align:left;
  font-size:16px;font-weight:600;color:var(--ink);
}
.faq-q .mark{position:relative;width:22px;height:22px;flex-shrink:0;}
.faq-q .mark::before,.faq-q .mark::after{
  content:"";position:absolute;border-radius:2px;background:#e0284f;
  transition:transform .28s ease,opacity .28s ease;
}
.faq-q .mark::before{left:0;top:10px;width:22px;height:2px;}
.faq-q .mark::after{left:10px;top:0;width:2px;height:22px;}
.faq-item.open .mark::after{transform:rotate(90deg);opacity:0;}
.faq-a{max-height:0;overflow:hidden;transition:max-height .32s ease;}
.faq-a p{padding:0 20px 18px;font-size:14.5px;color:var(--sub);}
.faq-item.open .faq-a{max-height:340px;}

/* 联系与表单 */
.contact-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:26px;align-items:start;}
.contact-card{
  padding:26px;border-radius:20px;background:#fff;
  border:1px solid var(--line);box-shadow:var(--shadow-sm);
}
.contact-card h3{font-size:18px;font-weight:800;}
.contact-list{margin-top:16px;display:grid;gap:12px;}
.contact-list li{display:flex;gap:10px;font-size:14.5px;color:var(--sub);}
.contact-list b{color:var(--ink);font-weight:700;flex-shrink:0;min-width:70px;}
.qr-box{
  margin-top:18px;padding:16px;border-radius:14px;
  background:#fff8f4;border:1px dashed #f0d8cb;text-align:center;
}
.qr-box img{width:132px;height:132px;object-fit:contain;margin:0 auto;border-radius:10px;background:#fff;}
.qr-box p{margin-top:10px;font-size:13.5px;color:var(--muted);}
.form-card{
  padding:26px;border-radius:20px;background:#fff;
  border:1px solid var(--line);box-shadow:var(--shadow-md);
}
.form-card h3{font-size:18px;font-weight:800;}
.form-card > p{margin-top:8px;font-size:14.5px;color:var(--sub);}
.req-form{margin-top:18px;}
.form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;}
.field{display:flex;flex-direction:column;gap:6px;}
.field.full{grid-column:1/-1;}
.field label{font-size:14px;font-weight:600;color:var(--sub);}
.field input,.field select,.field textarea{
  width:100%;padding:12px 14px;border-radius:12px;
  border:1.5px solid #ecdbd2;background:#fff;color:var(--ink);
  font-size:15px;font-family:inherit;
  transition:border-color .22s ease,box-shadow .22s ease;
}
.field input::placeholder,.field textarea::placeholder{color:#b3a7b8;}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--orange);
  box-shadow:0 0 0 3px rgba(255,122,61,.16);
}
.field textarea{min-height:112px;resize:vertical;}
.form-submit{width:100%;}
.form-tip{margin-top:10px;font-size:13px;color:var(--muted);text-align:center;}
.join-bar{
  margin-top:26px;padding:26px;border-radius:20px;
  display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
  background:linear-gradient(120deg,#ff3d6e 0%,#ff7a3d 100%);
  box-shadow:0 16px 36px rgba(255,61,110,.28);
}
.join-bar h3{font-size:19px;font-weight:800;color:#fff;}
.join-bar p{margin-top:6px;font-size:14.5px;color:rgba(255,255,255,.92);}
.join-bar .btn{background:#fff;color:#c81f45;border-color:#fff;box-shadow:0 10px 22px rgba(0,0,0,.16);}
.join-bar .btn:hover{transform:translateY(-2px);}

/* 页脚 */
.site-footer{
  background:#211527;color:#f4eef8;
  padding:52px 0 24px;margin-top:0;
}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:30px;align-items:start;}
.footer-brand .brand{color:#fff;}
.footer-brand p{margin-top:14px;font-size:14px;color:#c9bdd6;max-width:330px;}
.footer-brand .footer-note{margin-top:10px;font-size:14px;color:#c9bdd6;}
.footer-brand .footer-note a{color:#ffb08a;font-weight:600;}
.footer-brand .footer-note a:hover{text-decoration:underline;}
.footer-col h3{font-size:15px;font-weight:700;color:#fff;letter-spacing:.02em;}
.footer-col ul{margin-top:14px;display:grid;gap:9px;}
.footer-col li,.footer-col li a{font-size:14px;color:#c9bdd6;}
.footer-col li a{transition:color .2s ease;}
.footer-col li a:hover{color:#ffb08a;}
.footer-bottom{
  margin-top:36px;padding-top:20px;
  border-top:1px solid rgba(255,255,255,.14);
  display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:13.5px;color:#a99bb8;
}
.footer-bottom a{color:#ffb08a;font-weight:600;}
.footer-bottom a:hover{text-decoration:underline;}

/* 浮动客服与返回顶部 */
.float-service{position:fixed;right:18px;bottom:86px;z-index:120;}
.fs-btn{
  width:54px;height:54px;border-radius:50%;border:none;cursor:pointer;
  background:var(--grad);color:#fff;font-size:13px;font-weight:700;line-height:1.25;
  box-shadow:0 12px 26px rgba(255,61,110,.36);
  transition:transform .25s ease,box-shadow .25s ease;
}
.fs-btn:hover{transform:translateY(-3px);box-shadow:0 16px 32px rgba(255,61,110,.45);}
.fs-panel{
  display:none;position:absolute;right:0;bottom:66px;width:236px;
  padding:18px;border-radius:18px;background:#fff;color:var(--ink);
  border:1px solid var(--line);box-shadow:var(--shadow-md);
}
.fs-panel.open{display:block;animation:fadeUp .25s ease;}
.fs-panel h4{font-size:15px;font-weight:800;margin:0 0 12px;}
.fs-panel img{width:100%;max-width:150px;height:auto;margin:0 auto 10px;border-radius:10px;background:#fff8f4;padding:6px;}
.fs-panel p{font-size:13.5px;color:var(--sub);margin-top:6px;}
.fs-panel p b{color:var(--ink);}
@keyframes fadeUp{from{opacity:0;transform:translateY(8px);}to{opacity:1;transform:none;}}
.to-top{
  position:fixed;right:18px;bottom:22px;z-index:119;
  width:44px;height:44px;border-radius:50%;border:1px solid var(--line);
  background:#fff;color:#c81f45;font-size:17px;font-weight:800;cursor:pointer;
  box-shadow:var(--shadow-sm);opacity:0;visibility:hidden;
  transition:opacity .25s ease,transform .25s ease,visibility .25s ease;
}
.to-top.show{opacity:1;visibility:visible;}
.to-top:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);}

/* 入场动画 */
html.js .reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease;}
html.js .reveal.visible{opacity:1;transform:none;}

/* 响应式 */
@media (max-width:1100px){
  .main-nav{
    display:none;position:absolute;left:-22px;right:-22px;top:100%;
    flex-direction:column;align-items:stretch;
    padding:12px 22px 18px;background:#fff;
    border-top:1px solid var(--line);border-bottom:1px solid var(--line);
    box-shadow:0 18px 32px rgba(27,18,38,.12);
  }
  .main-nav.open{display:flex;}
  .nav-links{flex-direction:column;align-items:stretch;}
  .nav-links a{padding:12px 6px;border-bottom:1px solid #f7ece5;border-radius:0;}
  .nav-cta{margin:14px 0 0;justify-content:center;}
  .nav-toggle{display:flex;margin-left:auto;}
  .nav-bar{justify-content:space-between;}
}
@media (max-width:1000px){
  .hero{padding:44px 0 48px;}
  .hero-grid{grid-template-columns:1fr;gap:32px;}
  .grid-3{grid-template-columns:repeat(2,1fr);}
  .steps{grid-template-columns:repeat(2,1fr);}
  .metrics{grid-template-columns:repeat(2,1fr);}
  .industry-list{grid-template-columns:1fr;}
  .network-panel{grid-template-columns:1fr;}
  .wiki-grid{grid-template-columns:1fr;}
  .contact-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .score-card{grid-template-columns:1fr;}
}
@media (max-width:640px){
  .section{padding:52px 0;}
  .grid-3{grid-template-columns:1fr;}
  .steps{grid-template-columns:1fr;}
  .metrics{grid-template-columns:1fr 1fr;gap:12px;}
  .metric{padding:16px 16px;}
  .metric .num{font-size:23px;}
  .form-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .network-grid{grid-template-columns:1fr;}
  .hero-actions .btn{flex:1 1 auto;}
  .join-bar{padding:22px;}
  .join-bar .btn{width:100%;}
  .fs-panel{width:206px;}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  html.js .reveal{opacity:1;transform:none;transition:none;}
  .hero-panel::after{animation:none;}
}