:root{
  --blue-900:#071b3f;
  --blue-800:#0c2a63;
  --blue-700:#123b8f;
  --blue-600:#1a4fd6;
  --blue-500:#2a6bf2;
  --cyan:#0bb6d6;
  --gold:#f6a52a;
  --ink:#0c1a33;
  --ink-2:#45577a;
  --ink-3:#6b7b9c;
  --line:#e0e9fa;
  --bg:#f4f8ff;
  --radius:16px;
  --shadow:0 10px 28px rgba(18,59,143,.08);
  --shadow-lg:0 22px 50px rgba(18,59,143,.16);
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;scroll-padding-top:88px;}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  color:var(--ink);
  font-size:16px;
  line-height:1.7;
  background:
    radial-gradient(900px 520px at 6% -8%,rgba(42,107,242,.16),transparent 62%),
    radial-gradient(820px 520px at 98% 6%,rgba(11,182,214,.13),transparent 64%),
    linear-gradient(180deg,#f7faff 0%,#eef4ff 46%,#f6faff 100%);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding-left:0;list-style:none;}
a{color:inherit;text-decoration:none;}
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 20px;}

/* ---------- 入场动画 ---------- */
.js .reveal{opacity:0;transform:translateY(22px);transition:opacity .7s cubic-bezier(.22,.61,.36,1),transform .7s cubic-bezier(.22,.61,.36,1);}
.js .reveal.in{opacity:1;transform:none;}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  .js .reveal{opacity:1;transform:none;transition:none;}
}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:90;
  background:rgba(255,255,255,.9);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(224,233,250,.95);
  box-shadow:0 2px 14px rgba(18,59,143,.05);
}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:70px;}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.ai-page-logo{display:block;width:auto;max-width:132px;max-height:38px;height:auto;}
.brand-name{font-size:17px;font-weight:800;letter-spacing:.02em;color:var(--blue-800);white-space:nowrap;}
.nav-links{display:flex;align-items:center;justify-content:center;gap:0;flex:1 1 auto;}
.nav-links a{
  display:block;padding:8px 11px;border-radius:8px;
  font-size:14px;font-weight:500;color:var(--ink-2);white-space:nowrap;
  transition:color .22s ease,background-color .22s ease;
}
.nav-links a:hover{color:var(--blue-600);background:#eaf1ff;}
.nav-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.nav-toggle{
  display:none;width:42px;height:42px;border:1px solid var(--line);background:#fff;border-radius:11px;
  cursor:pointer;padding:0;align-items:center;justify-content:center;flex-direction:column;gap:4px;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--blue-700);transition:transform .25s ease,opacity .25s ease;}
.nav-toggle.active span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.nav-toggle.active span:nth-child(2){opacity:0;}
.nav-toggle.active span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 26px;border-radius:12px;border:1px solid transparent;
  font-size:15px;font-weight:600;font-family:inherit;cursor:pointer;
  transition:transform .22s ease,box-shadow .22s ease,background-color .22s ease,color .22s ease;
}
.btn:active{transform:translateY(1px) scale(.99);}
.btn-primary{background:linear-gradient(135deg,#2f76f7,#1240b8);color:#fff;box-shadow:0 10px 24px rgba(26,79,214,.28);}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 32px rgba(26,79,214,.36);}
.btn-ghost{background:#fff;color:var(--blue-700);border-color:#c6dbff;}
.btn-ghost:hover{background:#eff5ff;transform:translateY(-2px);box-shadow:0 12px 26px rgba(42,107,242,.16);}
.btn-sm{padding:9px 18px;font-size:14px;border-radius:10px;}
.btn-link{color:var(--blue-700);font-weight:600;font-size:15px;display:inline-flex;align-items:center;gap:6px;}
.btn-link::after{content:"";width:7px;height:7px;border-top:2px solid currentColor;border-right:2px solid currentColor;transform:rotate(45deg);transition:transform .22s ease;}
.btn-link:hover::after{transform:rotate(45deg) translate(2px,-2px);}

/* ---------- 通用区块 ---------- */
.sec{padding:74px 0;position:relative;}
.sec-alt{background:rgba(255,255,255,.62);border-top:1px solid rgba(224,233,250,.7);border-bottom:1px solid rgba(224,233,250,.7);}
.sec-head{max-width:780px;margin:0 auto 46px;text-align:center;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;padding:6px 15px;border-radius:999px;
  background:rgba(42,107,242,.1);color:var(--blue-700);font-size:13px;font-weight:700;letter-spacing:.05em;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--blue-500);}
.sec-head h2{font-size:34px;line-height:1.3;margin:16px 0 14px;letter-spacing:-.01em;color:var(--blue-900);}
.sec-head p{color:var(--ink-2);font-size:16px;}
.grid{display:grid;gap:20px;}
.g2{grid-template-columns:repeat(2,1fr);}
.g3{grid-template-columns:repeat(3,1fr);}
.g4{grid-template-columns:repeat(4,1fr);}

/* ---------- 卡片 ---------- */
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 24px;box-shadow:0 4px 16px rgba(18,59,143,.05);
  transition:transform .3s cubic-bezier(.22,.61,.36,1),box-shadow .3s ease,border-color .3s ease;
}
.card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg);border-color:#c4d9ff;}
.card h3{font-size:18px;margin-bottom:10px;color:var(--blue-900);letter-spacing:.01em;}
.card p{font-size:14.5px;color:var(--ink-2);line-height:1.75;}
.icon-tile{
  display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:12px;
  background:linear-gradient(135deg,#e8f0ff,#d6e6ff);color:var(--blue-600);margin-bottom:16px;
}
.icon-tile svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;}

/* ---------- HERO ---------- */
.hero{position:relative;padding:66px 0 70px;overflow:hidden;}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(660px 420px at 14% 2%,rgba(42,107,242,.18),transparent 66%),
    radial-gradient(560px 380px at 88% 20%,rgba(11,182,214,.16),transparent 70%);
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(42,107,242,.055) 1px,transparent 1px),linear-gradient(90deg,rgba(42,107,242,.055) 1px,transparent 1px);
  background-size:58px 58px;
  -webkit-mask-image:radial-gradient(circle at 50% 26%,#000,transparent 74%);
  mask-image:radial-gradient(circle at 50% 26%,#000,transparent 74%);
}
.hero-inner{position:relative;z-index:2;max-width:900px;margin:0 auto;text-align:center;}
.hero h1{
  font-size:50px;line-height:1.2;margin:20px 0 18px;
  letter-spacing:-.02em;color:var(--blue-900);
}
.hero h1 em{font-style:normal;color:var(--blue-600);}
.hero-lead{font-size:17px;color:var(--ink-2);max-width:760px;margin:0 auto;}
.hero-lead strong{color:var(--blue-700);font-weight:700;}
.hero-actions{display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:14px;margin-top:30px;}
.hero-note{margin-top:16px;font-size:13.5px;color:var(--ink-3);letter-spacing:.03em;}
.hero-metrics{position:relative;z-index:2;display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:46px;}
.metric{
  background:rgba(255,255,255,.86);border:1px solid rgba(198,219,255,.95);border-radius:14px;
  padding:18px 18px 16px;text-align:left;
  transition:transform .3s ease,box-shadow .3s ease;
}
.metric:hover{transform:translateY(-4px);box-shadow:0 16px 34px rgba(18,59,143,.12);}
.metric strong{display:block;font-size:21px;font-weight:800;color:var(--blue-700);letter-spacing:-.01em;}
.metric span{display:block;font-size:13px;color:var(--ink-3);margin-top:4px;}
.hero-orb{position:absolute;border-radius:50%;filter:blur(2px);pointer-events:none;z-index:1;}
.orb-1{width:150px;height:150px;left:-40px;top:70px;background:radial-gradient(circle at 32% 32%,rgba(42,107,242,.32),rgba(42,107,242,0) 70%);animation:floatSlow 9s ease-in-out infinite;}
.orb-2{width:190px;height:190px;right:-52px;top:150px;background:radial-gradient(circle at 40% 40%,rgba(11,182,214,.3),rgba(11,182,214,0) 70%);animation:floatSlow 11s ease-in-out infinite reverse;}
@keyframes floatSlow{0%,100%{transform:translateY(0);}50%{transform:translateY(-18px);}}

/* ---------- 步骤 ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;}
.step{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 22px;transition:transform .3s ease,box-shadow .3s ease;}
.step:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg);}
.step-num{
  display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:11px;
  background:linear-gradient(135deg,var(--blue-500),var(--blue-700));color:#fff;font-weight:800;font-size:15px;
  margin-bottom:16px;
}
.step h3{font-size:17px;margin-bottom:8px;color:var(--blue-900);}
.step p{font-size:14px;color:var(--ink-2);}

/* ---------- 模型标签云 ---------- */
.model-cloud{
  margin-top:34px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:28px 26px;box-shadow:var(--shadow);
}
.model-cloud-title{font-size:15px;font-weight:700;color:var(--blue-800);margin-bottom:16px;}
.tags{display:flex;flex-wrap:wrap;gap:9px;}
.tags span{
  display:inline-block;padding:6px 13px;border-radius:999px;font-size:13.5px;
  background:#eff5ff;color:var(--blue-700);border:1px solid #dbe8ff;
  transition:background-color .22s ease,color .22s ease,transform .22s ease;
}
.tags span:hover{background:var(--blue-600);color:#fff;border-color:var(--blue-600);transform:translateY(-2px);}

/* ---------- 时间线 ---------- */
.timeline{position:relative;display:grid;grid-template-columns:repeat(5,1fr);gap:16px;}
.timeline::before{
  content:"";position:absolute;left:6%;right:6%;top:26px;height:2px;
  background:linear-gradient(90deg,#c8dcff,#2a6bf2,#c8dcff);
}
.tl-item{position:relative;text-align:center;padding-top:0;}
.tl-dot{
  position:relative;z-index:2;display:inline-flex;align-items:center;justify-content:center;
  width:52px;height:52px;border-radius:50%;background:#fff;border:2px solid #c8dcff;
  color:var(--blue-700);font-weight:800;font-size:15px;margin-bottom:14px;
  transition:border-color .3s ease,box-shadow .3s ease,transform .3s ease;
}
.tl-item:hover .tl-dot{border-color:var(--blue-500);box-shadow:0 10px 24px rgba(42,107,242,.24);transform:translateY(-3px);}
.tl-item h3{font-size:16px;margin-bottom:6px;color:var(--blue-900);}
.tl-item p{font-size:13.5px;color:var(--ink-2);}

/* ---------- 案例 ---------- */
.case-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:14px;box-shadow:0 4px 16px rgba(18,59,143,.05);transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;}
.case-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg);border-color:#c4d9ff;}
.case-media{
  aspect-ratio:4/3;width:100%;background:linear-gradient(135deg,#eef5ff,#e2edff);
  border-radius:12px;overflow:hidden;display:flex;align-items:center;justify-content:center;
}
.case-media img{
  display:block;width:100%;height:100%;object-fit:contain;
  transition:transform .4s ease;
}
.case-card:hover .case-media img{transform:scale(1.03);}
.case-card figcaption{padding:14px 8px 6px;font-size:15px;font-weight:600;color:var(--blue-900);}

/* ---------- 对比评测 ---------- */
.compare-top{display:grid;grid-template-columns:1.15fr .85fr;gap:22px;margin-bottom:26px;align-items:stretch;}
.score-card{
  background:linear-gradient(140deg,#123b8f,#1a4fd6 58%,#2a6bf2);
  border-radius:18px;padding:32px 30px;color:#fff;display:flex;flex-direction:column;justify-content:center;
  box-shadow:0 20px 44px rgba(18,59,143,.28);
}
.score-card .score-label{font-size:14px;letter-spacing:.14em;color:#bcd6ff;font-weight:600;}
.score-main{display:flex;align-items:flex-end;gap:8px;margin:8px 0 4px;}
.score-main b{font-size:56px;line-height:1;font-weight:800;letter-spacing:-.02em;}
.score-main span{font-size:16px;color:#cfe0ff;padding-bottom:8px;}
.stars{font-size:20px;letter-spacing:4px;color:#ffd469;}
.score-desc{font-size:14px;color:#d8e6ff;margin-top:10px;}
.compare-note{background:#fff;border:1px solid var(--line);border-radius:18px;padding:30px 28px;box-shadow:var(--shadow);display:flex;flex-direction:column;justify-content:center;}
.compare-note h3{font-size:19px;color:var(--blue-900);margin-bottom:12px;}
.compare-note p{font-size:14.5px;color:var(--ink-2);margin-bottom:10px;}
.compare-note p:last-of-type{margin-bottom:0;}
.table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;border:1px solid var(--line);border-radius:16px;background:#fff;box-shadow:var(--shadow);}
table{border-collapse:collapse;width:100%;min-width:800px;font-size:15px;}
thead th{background:#f1f6ff;color:var(--blue-800);font-weight:700;padding:15px 18px;text-align:left;white-space:nowrap;border-bottom:1px solid var(--line);}
tbody td{padding:14px 18px;border-bottom:1px solid #eef3fc;color:var(--ink-2);vertical-align:middle;}
tbody tr:last-child td{border-bottom:none;}
tbody tr:hover td{background:#f8fbff;}
tbody td:first-child{font-weight:600;color:var(--blue-900);white-space:nowrap;}
tbody td:nth-child(2){color:var(--blue-700);font-weight:600;}

/* ---------- 评论 ---------- */
.review{display:flex;flex-direction:column;gap:14px;}
.review-text{font-size:14.5px;color:var(--ink-2);line-height:1.8;}
.review-user{display:flex;align-items:center;gap:12px;margin-top:auto;padding-top:6px;}
.avatar{
  width:40px;height:40px;border-radius:50%;flex:0 0 40px;
  background:linear-gradient(135deg,#dbe9ff,#b9d3ff);color:var(--blue-700);
  display:flex;align-items:center;justify-content:center;font-weight:800;font-size:15px;
}
.review-user b{display:block;font-size:14.5px;color:var(--blue-900);}
.review-user span{display:block;font-size:12.5px;color:var(--ink-3);}
.quote-mark{font-size:30px;line-height:1;color:#c8dcff;font-weight:800;}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:880px;margin:0 auto;display:flex;flex-direction:column;gap:12px;}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;transition:border-color .25s ease,box-shadow .25s ease;}
.faq-item:hover{border-color:#c4d9ff;}
.faq-item[open]{border-color:#a9c8ff;box-shadow:0 14px 32px rgba(18,59,143,.11);}
.faq-item summary{
  list-style:none;cursor:pointer;padding:17px 22px;display:flex;align-items:center;justify-content:space-between;gap:16px;
  font-size:16px;font-weight:600;color:var(--blue-900);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"";width:9px;height:9px;flex:0 0 9px;margin-right:4px;
  border-right:2px solid var(--blue-500);border-bottom:2px solid var(--blue-500);
  transform:rotate(45deg);transition:transform .28s ease;
}
.faq-item[open] summary::after{transform:rotate(-135deg);}
.faq-body{padding:0 22px 20px;font-size:14.8px;color:var(--ink-2);line-height:1.8;}

/* ---------- 文章列表 ---------- */
.news-list{display:flex;flex-direction:column;gap:12px;max-width:900px;margin:0 auto;}
.news-item{
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px 22px;
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.news-item:hover{transform:translateX(4px);box-shadow:0 12px 28px rgba(18,59,143,.1);border-color:#c4d9ff;}
.news-item h3{font-size:15.5px;color:var(--blue-900);font-weight:600;}
.news-item span{font-size:13px;color:var(--ink-3);flex:0 0 auto;}
.news-item .arrow{width:8px;height:8px;border-top:2px solid var(--blue-500);border-right:2px solid var(--blue-500);transform:rotate(45deg);flex:0 0 8px;}

/* ---------- 加盟 ---------- */
.partner-box{
  display:grid;grid-template-columns:1fr 1fr;gap:26px;align-items:center;
  background:linear-gradient(135deg,#0c2a63,#1a4fd6 62%,#2a6bf2);
  border-radius:20px;padding:44px 40px;color:#fff;
  box-shadow:0 24px 50px rgba(18,59,143,.26);
}
.partner-box h2{font-size:28px;line-height:1.35;margin-bottom:14px;color:#fff;}
.partner-box p{font-size:14.8px;color:#d3e2ff;}
.partner-list{display:grid;gap:12px;}
.partner-list li{
  display:flex;align-items:flex-start;gap:10px;font-size:14.5px;color:#eaf2ff;
  background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.2);
  border-radius:12px;padding:12px 16px;
}
.partner-list li::before{
  content:"";width:7px;height:7px;margin-top:8px;flex:0 0 7px;border-radius:50%;background:#7cd8ff;
}
.partner-btn{
  display:inline-flex;margin-top:22px;padding:12px 26px;border-radius:12px;
  background:#fff;color:var(--blue-700);font-weight:700;font-size:15px;
  transition:transform .22s ease,box-shadow .22s ease;
}
.partner-btn:hover{transform:translateY(-2px);box-shadow:0 14px 30px rgba(0,0,0,.22);}

/* ---------- 联系 / 表单 ---------- */
.contact-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:24px;align-items:start;}
.form-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:32px 30px;box-shadow:var(--shadow);}
.form-card h3{font-size:20px;color:var(--blue-900);margin-bottom:8px;}
.form-card .form-tip{font-size:14px;color:var(--ink-3);margin-bottom:22px;}
.form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;}
.field{display:flex;flex-direction:column;gap:7px;font-size:14px;font-weight:600;color:var(--ink-2);}
.field.full{grid-column:1 / -1;}
.field input,.field select,.field textarea{
  font-family:inherit;font-size:15px;font-weight:400;color:var(--ink);
  background:#f8fbff;border:1px solid var(--line);border-radius:11px;padding:12px 14px;
  outline:none;width:100%;transition:border-color .22s ease,box-shadow .22s ease,background-color .22s ease;
}
.field textarea{resize:vertical;min-height:110px;}
.field input::placeholder,.field textarea::placeholder{color:#9aa9c4;}
.field input:focus,.field select:focus,.field textarea:focus{
  border-color:var(--blue-500);background:#fff;box-shadow:0 0 0 3px rgba(42,107,242,.14);
}
.form-submit{margin-top:22px;display:flex;align-items:center;gap:16px;flex-wrap:wrap;}
.form-submit small{font-size:13px;color:var(--ink-3);}
.contact-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:28px 26px;box-shadow:var(--shadow);}
.contact-card h3{font-size:18px;color:var(--blue-900);margin-bottom:16px;}
.contact-row{display:flex;align-items:flex-start;gap:10px;font-size:14.5px;color:var(--ink-2);padding:9px 0;border-bottom:1px dashed #eaf1fc;}
.contact-row:last-of-type{border-bottom:none;}
.contact-row b{color:var(--blue-800);font-weight:700;flex:0 0 auto;}
.contact-row a{color:var(--blue-600);word-break:break-all;}
.contact-row a:hover{text-decoration:underline;}
.qr-box{margin-top:18px;padding-top:18px;border-top:1px solid var(--line);text-align:center;}
.qr-box img{display:block;width:150px;max-width:100%;height:auto;border-radius:12px;border:1px solid var(--line);margin:0 auto 10px;}
.qr-box p{font-size:13px;color:var(--ink-3);}

/* ---------- 页脚 ---------- */
.site-footer{background:#071b3f;color:#c2d4f2;margin-top:0;padding:56px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:36px;padding-bottom:34px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand .brand-name{color:#fff;}
.footer-desc{font-size:14px;color:#a9c0e4;line-height:1.8;max-width:420px;}
.footer-col h4{font-size:15px;color:#fff;margin-bottom:14px;font-weight:700;}
.footer-col ul{display:flex;flex-direction:column;gap:9px;}
.footer-col a,.footer-col li{font-size:14px;color:#a9c0e4;transition:color .22s ease;}
.footer-col a:hover{color:#fff;}
.friend-links{border-top:1px solid rgba(255,255,255,.12);padding:22px 0;}
.friend-links h4{font-size:14px;color:#fff;margin-bottom:12px;font-weight:700;}
.friend-links .tags{gap:8px;}
.friend-links .tags a{
  display:inline-block;padding:6px 13px;border-radius:999px;font-size:13px;
  color:#c2d4f2;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.14);
  transition:background-color .22s ease,color .22s ease;
}
.friend-links .tags a:hover{background:#2a6bf2;color:#fff;border-color:#2a6bf2;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);padding:18px 0 24px;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  font-size:13px;color:#8fa9d1;
}
.footer-bottom a{color:#a9c0e4;}
.footer-bottom a:hover{color:#fff;}

/* ---------- 浮动工具 ---------- */
.float-dock{position:fixed;right:20px;bottom:86px;z-index:95;display:flex;flex-direction:column;align-items:flex-end;gap:10px;}
.dock-panel{
  width:212px;background:#fff;border:1px solid var(--line);border-radius:16px;
  box-shadow:0 20px 44px rgba(18,59,143,.2);padding:16px;text-align:center;
  opacity:0;visibility:hidden;transform:translateY(10px) scale(.96);
  transition:opacity .25s ease,transform .25s ease,visibility .25s;
}
.dock-panel.show{opacity:1;visibility:visible;transform:none;}
.dock-panel img{display:block;width:100%;max-width:150px;height:auto;border-radius:10px;margin:0 auto 10px;}
.dock-panel p{font-size:12.5px;color:var(--ink-2);line-height:1.7;}
.dock-panel a{display:block;margin-top:10px;padding:9px 0;border-radius:10px;background:var(--blue-600);color:#fff;font-size:13.5px;font-weight:600;}
.dock-btn{
  display:inline-flex;align-items:center;gap:8px;padding:12px 20px;border-radius:999px;border:none;
  background:linear-gradient(135deg,#2f76f7,#1240b8);color:#fff;font-size:14px;font-weight:700;
  cursor:pointer;font-family:inherit;box-shadow:0 12px 26px rgba(26,79,214,.34);
  transition:transform .22s ease,box-shadow .22s ease;
}
.dock-btn:hover{transform:translateY(-2px);box-shadow:0 16px 32px rgba(26,79,214,.42);}
.back-top{
  position:fixed;right:20px;bottom:24px;z-index:95;width:44px;height:44px;border-radius:50%;
  border:1px solid var(--line);background:#fff;color:var(--blue-700);cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 10px 24px rgba(18,59,143,.16);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .25s ease,transform .25s ease,visibility .25s;
}
.back-top.show{opacity:1;visibility:visible;transform:none;}
.back-top svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;}

/* ---------- 响应式 ---------- */
@media (max-width:1080px){
  .hero h1{font-size:42px;}
  .steps{grid-template-columns:repeat(2,1fr);}
  .timeline{grid-template-columns:repeat(3,1fr);row-gap:28px;}
  .timeline::before{display:none;}
  .g4{grid-template-columns:repeat(2,1fr);}
  .g3{grid-template-columns:repeat(2,1fr);}
  .compare-top{grid-template-columns:1fr;}
  .contact-grid{grid-template-columns:1fr;}
  .partner-box{grid-template-columns:1fr;padding:34px 26px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:26px;}
}
@media (max-width:1024px){
  .nav-toggle{display:flex;}
  .nav-links{
    position:absolute;top:100%;left:0;right:0;display:none;flex-direction:column;align-items:stretch;
    gap:0;background:#fff;border-bottom:1px solid var(--line);
    box-shadow:0 18px 34px rgba(18,59,143,.12);padding:10px 20px 18px;
  }
  .nav-links.open{display:flex;}
  .nav-links a{padding:12px 10px;font-size:15px;border-radius:10px;}
}
@media (max-width:860px){
  .hero-metrics{grid-template-columns:repeat(2,1fr);}
  .g4,.g3,.g2{grid-template-columns:repeat(2,1fr);}
  .sec{padding:60px 0;}
  .sec-head h2{font-size:28px;}
  .hero{padding:52px 0 56px;}
  .hero h1{font-size:34px;}
  .hero-lead{font-size:15.5px;}
  .form-grid{grid-template-columns:1fr;}
}
@media (max-width:640px){
  .container{padding:0 16px;}
  .brand-name{display:none;}
  .hero h1{font-size:28px;}
  .hero-metrics{grid-template-columns:1fr;gap:12px;}
  .steps{grid-template-columns:1fr;}
  .timeline{grid-template-columns:1fr;row-gap:20px;}
  .tl-item{text-align:left;padding-left:66px;min-height:52px;}
  .tl-dot{position:absolute;left:0;top:0;margin-bottom:0;}
  .g4,.g3,.g2{grid-template-columns:1fr;}
  .sec-head h2{font-size:24px;}
  .card{padding:22px 20px;}
  .form-card,.contact-card{padding:24px 20px;}
  .footer-grid{grid-template-columns:1fr;gap:24px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .news-item{flex-direction:column;align-items:flex-start;gap:6px;}
  .score-card{padding:26px 22px;}
  .score-main b{font-size:46px;}
  .float-dock{right:14px;bottom:80px;}
  .back-top{right:14px;bottom:20px;}
}