:root{
  --yellow:#ffd400;
  --yellow-deep:#f5b800;
  --yellow-soft:#fff4bf;
  --ink:#1a1a1a;
  --ink-2:#3a3a3a;
  --ink-3:#6b6b6b;
  --line:#e8e4d8;
  --bg:#fffdf5;
  --bg-2:#fdf8e6;
  --card:#ffffff;
  --shadow:0 10px 30px rgba(60,50,10,.08);
  --shadow-hover:0 18px 40px rgba(60,50,10,.14);
  --radius:18px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,sans-serif;
  background:var(--bg);
  color:var(--ink);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{text-decoration:none;color:inherit}
img{max-width:100%;height:auto;display:block}
ul{list-style:none}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}

/* 顶部导航 */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(255,253,245,.92);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.nav{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:66px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;letter-spacing:.5px;flex-shrink:0}
.brand .ai-page-logo{width:36px;height:auto}
.brand-name span{color:var(--yellow-deep)}
.nav-links{display:flex;align-items:center;gap:0;flex-wrap:wrap}
.nav-links a{
  display:inline-block;padding:8px 12px;border-radius:9px;
  font-size:14.5px;color:var(--ink-2);font-weight:500;
  transition:.25s;
}
.nav-links a:hover{background:var(--yellow-soft);color:var(--ink)}
.nav-cta{
  display:flex;align-items:center;gap:10px;flex-shrink:0;
}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:12px;font-weight:700;font-size:15px;
  border:none;cursor:pointer;transition:.28s;line-height:1.2;
}
.btn-primary{
  background:linear-gradient(135deg,#ffe040,var(--yellow));
  color:#2a2400;box-shadow:0 6px 18px rgba(245,184,0,.35);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 26px rgba(245,184,0,.45)}
.btn-dark{background:var(--ink);color:#fff}
.btn-dark:hover{transform:translateY(-2px);background:#000}
.btn-outline{background:transparent;color:var(--ink);border:1.5px solid var(--ink)}
.btn-outline:hover{background:var(--ink);color:#fff;transform:translateY(-2px)}
.nav-toggle{display:none;background:none;border:none;cursor:pointer;padding:6px;flex-direction:column;gap:5px}
.nav-toggle span{width:24px;height:2.5px;background:var(--ink);border-radius:2px;transition:.3s}

/* Hero */
.hero{
  position:relative;overflow:hidden;
  padding:80px 0 90px;
  background:
    radial-gradient(circle at 15% 20%, rgba(255,212,0,.22) 0, transparent 42%),
    radial-gradient(circle at 88% 12%, rgba(255,212,0,.18) 0, transparent 40%),
    linear-gradient(180deg,#fffef8 0%,#fff9dc 60%,var(--bg) 100%);
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(0,0,0,.025) 1px,transparent 1px),linear-gradient(90deg,rgba(0,0,0,.025) 1px,transparent 1px);
  background-size:46px 46px;
  mask-image:radial-gradient(ellipse at 50% 40%,#000 20%,transparent 78%);
  -webkit-mask-image:radial-gradient(ellipse at 50% 40%,#000 20%,transparent 78%);
}
.hero-grid{position:relative;z-index:2;display:grid;grid-template-columns:1.15fr .85fr;gap:50px;align-items:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  background:#fff;border:1px solid var(--line);border-radius:999px;
  padding:6px 16px;font-size:13px;font-weight:600;color:var(--ink-2);
  box-shadow:0 4px 12px rgba(0,0,0,.04);margin-bottom:22px;
}
.eyebrow i{width:8px;height:8px;border-radius:50%;background:var(--yellow-deep);display:inline-block;animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.5;transform:scale(.8)}}
.hero h1{font-size:clamp(30px,4.4vw,50px);line-height:1.2;font-weight:900;letter-spacing:-.5px;margin-bottom:20px}
.hero h1 em{
  font-style:normal;position:relative;white-space:nowrap;
  background:linear-gradient(120deg,var(--yellow) 0%,#ffc400 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero h1 em::after{
  content:"";position:absolute;left:0;right:0;bottom:2px;height:10px;
  background:var(--yellow);opacity:.35;border-radius:4px;z-index:-1;
}
.hero p.lead{font-size:17px;color:var(--ink-3);max-width:560px;margin-bottom:30px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:34px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px}
.hero-tags span{
  font-size:13px;padding:7px 14px;border-radius:999px;background:#fff;
  border:1px solid var(--line);color:var(--ink-2);font-weight:500;
  transition:.25s;
}
.hero-tags span:hover{background:var(--yellow-soft);border-color:var(--yellow-deep)}

.hero-panel{
  background:linear-gradient(160deg,#fff 0%,#fffdf0 100%);
  border:1px solid #f0e8c8;border-radius:26px;
  padding:28px;box-shadow:0 24px 60px rgba(120,100,20,.14);
  position:relative;
}
.hero-panel::before{
  content:"";position:absolute;top:-14px;right:-14px;width:90px;height:90px;
  background:radial-gradient(circle,var(--yellow) 0%,transparent 70%);
  opacity:.5;border-radius:50%;
}
.panel-title{font-size:14px;font-weight:800;color:var(--ink-3);letter-spacing:1px;margin-bottom:20px;text-transform:uppercase}
.metric-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.metric{
  background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px;
  transition:.3s;
}
.metric:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:var(--yellow)}
.metric b{display:block;font-size:26px;font-weight:900;color:var(--ink);line-height:1.1}
.metric b small{font-size:14px;font-weight:700;color:var(--yellow-deep)}
.metric span{font-size:12.5px;color:var(--ink-3)}

/* 通用区块 */
.section{padding:80px 0;position:relative}
.section.alt{background:linear-gradient(180deg,var(--bg-2) 0%,var(--bg) 100%)}
.section-head{max-width:720px;margin:0 auto 48px;text-align:center}
.section-head .tag{
  display:inline-block;font-size:13px;font-weight:700;letter-spacing:1.5px;
  color:var(--ink-2);background:var(--yellow-soft);border-radius:999px;
  padding:5px 14px;margin-bottom:16px;
}
.section-head h2{font-size:clamp(24px,3.4vw,36px);font-weight:900;line-height:1.25;margin-bottom:14px;letter-spacing:-.4px}
.section-head p{color:var(--ink-3);font-size:16px}

/* 关于我们 */
.about-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center}
.about-text h3{font-size:22px;font-weight:800;margin-bottom:16px}
.about-text p{color:var(--ink-2);margin-bottom:16px;font-size:15.5px}
.about-list{display:grid;gap:12px;margin-top:22px}
.about-list li{display:flex;gap:12px;align-items:flex-start;font-size:15px;color:var(--ink-2)}
.about-list li i{
  flex-shrink:0;width:22px;height:22px;border-radius:7px;background:var(--yellow);
  display:inline-flex;align-items:center;justify-content:center;margin-top:3px;
  font-style:normal;font-size:13px;font-weight:900;color:#2a2400;
}
.about-visual{display:grid;gap:16px}
.about-img{
  border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--shadow);background:#fff;transition:.35s;
}
.about-img:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.about-img img{width:100%;height:auto;object-fit:cover}

/* 服务卡片 */
.cards-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.svc-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:28px 24px;transition:.32s;position:relative;overflow:hidden;
}
.svc-card::before{
  content:"";position:absolute;left:0;top:0;width:100%;height:4px;
  background:linear-gradient(90deg,var(--yellow),#ffc400);
  transform:scaleX(0);transform-origin:left;transition:.35s;
}
.svc-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover);border-color:#f0e2a0}
.svc-card:hover::before{transform:scaleX(1)}
.svc-icon{
  width:48px;height:48px;border-radius:13px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,#fff3b0,var(--yellow));margin-bottom:18px;
  font-size:20px;font-weight:900;color:#2a2400;
}
.svc-card h3{font-size:18px;font-weight:800;margin-bottom:10px}
.svc-card p{font-size:14.5px;color:var(--ink-3);line-height:1.7}

/* 流程步骤 */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;position:relative}
.step{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 22px;transition:.3s;position:relative;
}
.step:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--yellow)}
.step-num{
  width:38px;height:38px;border-radius:11px;background:var(--ink);color:var(--yellow);
  display:flex;align-items:center;justify-content:center;font-weight:900;font-size:15px;
  margin-bottom:16px;
}
.step h3{font-size:16.5px;font-weight:800;margin-bottom:8px}
.step p{font-size:14px;color:var(--ink-3)}

/* 案例 */
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.case-card{
  border-radius:var(--radius);overflow:hidden;background:#fff;
  border:1px solid var(--line);box-shadow:var(--shadow);transition:.35s;display:flex;flex-direction:column;
}
.case-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.case-thumb{width:100%;overflow:hidden;background:#fffaf0}
.case-thumb img{width:100%;height:auto;object-fit:cover;transition:.5s}
.case-card:hover .case-thumb img{transform:scale(1.04)}
.case-body{padding:22px;display:flex;flex-direction:column;gap:8px;flex:1}
.case-body h3{font-size:17px;font-weight:800}
.case-body p{font-size:14px;color:var(--ink-3);flex:1}
.case-tag{display:inline-block;font-size:12px;font-weight:700;color:#5c4a00;background:var(--yellow-soft);padding:3px 10px;border-radius:999px;width:fit-content}

/* 对比评测 */
.compare-wrap{
  background:#fff;border:1px solid var(--line);border-radius:24px;
  overflow:hidden;box-shadow:var(--shadow);
}
.compare-hero{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:20px;
  padding:30px 32px;background:linear-gradient(120deg,#2a2400,#3d3300);color:#fff;
}
.compare-hero .score-box{display:flex;align-items:baseline;gap:8px}
.compare-hero .score-num{font-size:46px;font-weight:900;color:var(--yellow);line-height:1}
.compare-hero .score-denom{font-size:16px;color:#c9c2a0}
.compare-hero .stars{font-size:20px;color:var(--yellow);letter-spacing:3px}
.compare-hero h3{font-size:20px;font-weight:800;margin-bottom:6px}
.compare-hero p{font-size:13.5px;color:#d6cfae}
.compare-table-scroll{overflow-x:auto}
table.compare{
  width:100%;min-width:640px;border-collapse:collapse;font-size:14.5px;
}
table.compare th,table.compare td{padding:15px 20px;text-align:left;border-bottom:1px solid var(--line)}
table.compare thead th{background:#fffbe8;font-weight:800;color:var(--ink);font-size:14px}
table.compare thead th.hl{background:var(--yellow);color:#2a2400}
table.compare tbody tr:hover{background:#fffdf2}
table.compare td.good{font-weight:700;color:#5c4a00}
table.compare td .yes{color:#0f7a3d;font-weight:800}
table.compare td .mid{color:#a87d00;font-weight:700}

/* Token 比价 */
.token-wrap{background:#fff;border:1px solid var(--line);border-radius:22px;overflow:hidden;box-shadow:var(--shadow)}
.token-bar{display:grid;grid-template-columns:2fr 1fr 1fr;background:#fffbe8;padding:14px 24px;font-size:13.5px;font-weight:800;color:var(--ink-2)}
.token-row{display:grid;grid-template-columns:2fr 1fr 1fr;padding:15px 24px;border-top:1px solid var(--line);font-size:14.5px;transition:.25s;align-items:center}
.token-row:hover{background:#fffdf2}
.token-row b{font-weight:800}
.token-row .price{color:#0f7a3d;font-weight:800}
.token-row .price-official{color:var(--ink-3);text-decoration:line-through;font-size:13px}

/* 平台模型标签云 */
.model-cloud{display:flex;flex-wrap:wrap;gap:12px;justify-content:center}
.model-cloud span{
  display:inline-block;padding:9px 18px;border-radius:12px;background:#fff;
  border:1px solid var(--line);font-size:14px;font-weight:600;color:var(--ink-2);
  transition:.28s;cursor:default;
}
.model-cloud span:hover{background:var(--yellow);border-color:var(--yellow-deep);color:#2a2400;transform:translateY(-3px);box-shadow:0 8px 18px rgba(245,184,0,.3)}

/* 用户评论 */
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.review-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 24px;transition:.32s;display:flex;flex-direction:column;gap:14px;
}
.review-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover);border-color:#f0e2a0}
.review-stars{color:var(--yellow-deep);font-size:15px;letter-spacing:2px}
.review-text{font-size:14.5px;color:var(--ink-2);line-height:1.75;flex:1}
.review-user{display:flex;align-items:center;gap:12px;padding-top:14px;border-top:1px dashed var(--line)}
.review-avatar{
  width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,#ffe040,var(--yellow));
  display:flex;align-items:center;justify-content:center;font-weight:900;color:#2a2400;font-size:15px;flex-shrink:0;
}
.review-user b{font-size:14px;display:block}
.review-user span{font-size:12.5px;color:var(--ink-3)}

/* FAQ */
.faq-list{max-width:860px;margin:0 auto;display:grid;gap:12px}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;transition:.3s;
}
.faq-item:hover{border-color:#eedfa0}
.faq-q{
  width:100%;display:flex;justify-content:space-between;align-items:center;gap:16px;
  padding:18px 22px;background:none;border:none;cursor:pointer;text-align:left;
  font-size:15.5px;font-weight:700;color:var(--ink);font-family:inherit;transition:.25s;
}
.faq-q:hover{background:#fffdf2}
.faq-q .plus{
  flex-shrink:0;width:24px;height:24px;border-radius:50%;background:var(--yellow-soft);
  display:flex;align-items:center;justify-content:center;font-size:16px;font-weight:900;color:#5c4a00;
  transition:.3s;
}
.faq-item.open .plus{transform:rotate(45deg);background:var(--yellow)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-a p{padding:0 22px 20px;font-size:14.5px;color:var(--ink-3);line-height:1.75}

/* 文章 */
.article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.article-card{
  display:flex;flex-direction:column;gap:10px;background:#fff;border:1px solid var(--line);
  border-radius:14px;padding:22px;transition:.3s;
}
.article-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--yellow)}
.article-card .art-tag{font-size:12px;font-weight:700;color:#5c4a00;background:var(--yellow-soft);padding:3px 10px;border-radius:999px;width:fit-content}
.article-card h3{font-size:15.5px;font-weight:800;line-height:1.5}
.article-card p{font-size:13.5px;color:var(--ink-3);flex:1}
.article-card a.more{font-size:13.5px;font-weight:700;color:var(--yellow-deep);transition:.25s}
.article-card a.more:hover{color:var(--ink)}

/* 表单 */
.contact-grid{display:grid;grid-template-columns:1fr 1.15fr;gap:40px;align-items:start}
.contact-info{display:grid;gap:16px}
.contact-item{
  display:flex;gap:14px;align-items:flex-start;background:#fff;border:1px solid var(--line);
  border-radius:14px;padding:18px 20px;transition:.3s;
}
.contact-item:hover{box-shadow:var(--shadow);border-color:var(--yellow)}
.ci-icon{
  width:40px;height:40px;border-radius:11px;background:var(--yellow-soft);
  display:flex;align-items:center;justify-content:center;flex-shrink:0;font-size:17px;
}
.contact-item b{font-size:14.5px;display:block;margin-bottom:3px}
.contact-item span{font-size:13.5px;color:var(--ink-3);word-break:break-all}
.qr-box{margin-top:4px}
.qr-box img{width:150px;border-radius:12px;border:1px solid var(--line)}
.qr-box p{font-size:12.5px;color:var(--ink-3);margin-top:8px}
.form-card{background:#fff;border:1px solid var(--line);border-radius:22px;padding:32px;box-shadow:var(--shadow)}
.form-card h3{font-size:20px;font-weight:800;margin-bottom:6px}
.form-card .sub{font-size:13.5px;color:var(--ink-3);margin-bottom:24px}
.f-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.f-group{display:flex;flex-direction:column;gap:7px;margin-bottom:16px}
.f-group label{font-size:13.5px;font-weight:700;color:var(--ink-2)}
.f-group input,.f-group select,.f-group textarea{
  font-family:inherit;font-size:14.5px;padding:12px 14px;border-radius:11px;
  border:1.5px solid var(--line);background:#fffdf8;color:var(--ink);transition:.25s;outline:none;width:100%;
}
.f-group input:focus,.f-group select:focus,.f-group textarea:focus{border-color:var(--yellow-deep);background:#fff;box-shadow:0 0 0 3px rgba(255,212,0,.22)}
.f-group textarea{resize:vertical;min-height:110px}
.form-card .btn{width:100%;margin-top:6px}

/* 页脚 */
.site-footer{
  background:#1c1a12;color:#d8d3be;padding:56px 0 0;margin-top:0;
}
.footer-top{display:grid;grid-template-columns:1.4fr .8fr .8fr 1fr;gap:36px;padding-bottom:40px}
.footer-brand{display:flex;flex-direction:column;gap:14px}
.footer-brand .brand{color:#fff}
.footer-brand p{font-size:13.5px;color:#a8a290;line-height:1.75;max-width:320px}
.footer-col h4{font-size:14.5px;font-weight:800;color:#fff;margin-bottom:16px}
.footer-col ul{display:grid;gap:10px}
.footer-col ul li a{font-size:13.5px;color:#a8a290;transition:.25s}
.footer-col ul li a:hover{color:var(--yellow)}
.footer-links{display:flex;flex-wrap:wrap;gap:10px 16px}
.footer-links a{font-size:13px;color:#a8a290;transition:.25s}
.footer-links a:hover{color:var(--yellow)}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);padding:22px 0;
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  font-size:13px;color:#8f8a78;
}

/* 浮动客服 */
.float-service{position:fixed;right:20px;bottom:26px;z-index:200;display:flex;flex-direction:column;gap:12px;align-items:flex-end}
.float-btn{
  width:52px;height:52px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  cursor:pointer;border:none;box-shadow:0 8px 22px rgba(0,0,0,.18);transition:.3s;
  font-size:14px;font-weight:800;
}
.float-btn.primary{background:linear-gradient(135deg,#ffe040,var(--yellow));color:#2a2400}
.float-btn.dark{background:var(--ink);color:#fff}
.float-btn:hover{transform:translateY(-3px) scale(1.05)}
.float-qr{
  display:none;background:#fff;padding:12px;border-radius:14px;box-shadow:0 12px 30px rgba(0,0,0,.18);
  position:absolute;bottom:64px;right:0;
}
.float-qr img{width:150px;border-radius:8px}
.float-qr.show{display:block;animation:fadeUp .3s ease}
@keyframes fadeUp{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}

/* 动画 */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:translateY(0)}

/* 响应式 */
@media(max-width:980px){
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero-panel{order:2}
  .about-grid{grid-template-columns:1fr;gap:32px}
  .cards-grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .case-grid{grid-template-columns:repeat(2,1fr)}
  .review-grid{grid-template-columns:repeat(2,1fr)}
  .article-grid{grid-template-columns:repeat(2,1fr)}
  .contact-grid{grid-template-columns:1fr;gap:30px}
  .footer-top{grid-template-columns:1fr 1fr;gap:28px}
}
@media(max-width:760px){
  .nav-toggle{display:flex}
  .nav-links{
    position:absolute;top:100%;left:0;right:0;flex-direction:column;
    background:#fffdf5;border-bottom:1px solid var(--line);
    padding:12px 20px;gap:2px;display:none;box-shadow:0 12px 24px rgba(0,0,0,.08);
  }
  .nav-links.open{display:flex}
  .nav-links a{width:100%;padding:11px 14px}
  .nav-cta .btn-outline{display:none}
  .hero{padding:56px 0 64px}
  .section{padding:60px 0}
  .cards-grid,.steps,.case-grid,.review-grid,.article-grid{grid-template-columns:1fr}
  .footer-top{grid-template-columns:1fr;gap:26px}
  .token-bar,.token-row{grid-template-columns:1.4fr 1fr 1fr;padding-left:16px;padding-right:16px;font-size:13px}
  .compare-hero{padding:24px}
  .compare-hero .score-num{font-size:38px}
  .form-card{padding:24px}
  .f-row{grid-template-columns:1fr}
}
@media(max-width:480px){
  .container{padding:0 16px}
  .hero-actions .btn{width:100%}
  .metric-grid{grid-template-columns:1fr}
}