*{margin:0;padding:0;box-sizing:border-box}
:root{
  --brand:#1864ff;
  --brand-deep:#0b3fb0;
  --brand-soft:#eaf1ff;
  --accent:#ff7a3d;
  --accent-soft:#fff1e9;
  --ink:#101828;
  --ink-2:#344054;
  --ink-3:#667085;
  --line:#e4e9f2;
  --bg:#f6f9ff;
  --card:#ffffff;
  --radius:16px;
  --shadow:0 12px 30px rgba(16,42,96,.08);
  --shadow-lg:0 24px 50px rgba(16,42,96,.14);
}
html{scroll-behavior:smooth}
body{
  font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 20px}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}
section{position:relative}

/* ===== Header ===== */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:68px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand .ai-page-logo{max-height:40px;width:auto}
.brand-text{font-weight:700;font-size:17px;color:var(--ink);letter-spacing:.5px;white-space:nowrap}
.nav-links{display:flex;align-items:center;gap:0;flex-wrap:wrap}
.nav-links a{
  font-size:14.5px;color:var(--ink-2);padding:8px 13px;border-radius:8px;
  transition:background .2s,color .2s;white-space:nowrap;
}
.nav-links a:hover{background:var(--brand-soft);color:var(--brand)}
.nav-cta{display:flex;align-items:center;gap:10px;flex-shrink:0}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  border:none;cursor:pointer;font-family:inherit;font-weight:600;
  border-radius:10px;transition:transform .18s ease,box-shadow .18s ease,background .2s;
  text-align:center;
}
.btn:active{transform:translateY(1px) scale(.99)}
.btn-primary{
  background:linear-gradient(135deg,#2a7bff,#1864ff 60%,#0b45c8);
  color:#fff;padding:11px 22px;font-size:15px;
  box-shadow:0 8px 20px rgba(24,100,255,.32);
}
.btn-primary:hover{box-shadow:0 12px 28px rgba(24,100,255,.42);transform:translateY(-2px)}
.btn-ghost{
  background:#fff;color:var(--brand);border:1.5px solid #c8d9ff;padding:10px 20px;font-size:15px;
}
.btn-ghost:hover{background:var(--brand-soft);border-color:var(--brand)}
.btn-accent{background:linear-gradient(135deg,#ff9a5c,#ff7a3d);color:#fff;padding:11px 22px;font-size:15px;box-shadow:0 8px 20px rgba(255,122,61,.3)}
.btn-accent:hover{box-shadow:0 12px 26px rgba(255,122,61,.4);transform:translateY(-2px)}
.nav-toggle{
  display:none;background:none;border:1px solid var(--line);border-radius:8px;
  width:42px;height:38px;cursor:pointer;align-items:center;justify-content:center;flex-direction:column;gap:4px;
}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--ink);border-radius:2px;transition:.25s}
.nav-toggle.open span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* ===== Hero ===== */
.hero{
  background:
    radial-gradient(circle at 88% 12%,rgba(255,122,61,.16),transparent 42%),
    radial-gradient(circle at 10% 90%,rgba(24,100,255,.14),transparent 46%),
    linear-gradient(160deg,#f2f7ff 0%,#f8fbff 45%,#eef4ff 100%);
  padding:72px 0 76px;
  overflow:hidden;
}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;background:#fff;border:1px solid #d7e4ff;
  color:var(--brand);font-size:13px;font-weight:600;padding:7px 15px;border-radius:999px;
  box-shadow:0 4px 14px rgba(24,100,255,.1);margin-bottom:22px;
}
.hero-badge i{width:7px;height:7px;border-radius:50%;background:var(--accent);display:inline-block;animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.45;transform:scale(1.35)}}
.hero h1{
  font-size:44px;line-height:1.24;font-weight:800;letter-spacing:-.5px;color:#0a1a3c;
  margin-bottom:20px;
}
.hero h1 em{font-style:normal;color:var(--brand);position:relative;display:inline-block}
.hero h1 em::after{
  content:"";position:absolute;left:0;right:0;bottom:2px;height:12px;background:rgba(255,122,61,.22);
  border-radius:4px;z-index:-1;
}
.hero-desc{font-size:16.5px;color:var(--ink-2);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:9px}
.hero-tags span{
  font-size:13px;color:var(--ink-2);background:rgba(255,255,255,.86);border:1px solid var(--line);
  padding:5px 13px;border-radius:999px;
}
.hero-visual{position:relative}
.hero-panel{
  background:#fff;border-radius:22px;padding:26px;box-shadow:var(--shadow-lg);
  border:1px solid #eaf0ff;position:relative;z-index:2;
}
.hero-panel h3{font-size:15px;color:var(--ink-3);font-weight:600;margin-bottom:18px;letter-spacing:.4px}
.mini-models{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.mini-model{
  background:var(--bg);border-radius:12px;padding:13px 14px;border:1px solid #e9eefb;
  transition:transform .25s ease,box-shadow .25s ease,background .25s;
}
.mini-model:hover{transform:translateY(-3px);box-shadow:0 10px 22px rgba(24,100,255,.12);background:#fff}
.mini-model strong{display:block;font-size:14px;color:var(--ink);margin-bottom:2px}
.mini-model span{font-size:12px;color:var(--ink-3)}
.hero-float{
  position:absolute;right:-14px;top:-16px;background:linear-gradient(135deg,#ff9a5c,#ff7a3d);
  color:#fff;font-size:13px;font-weight:700;padding:9px 16px;border-radius:12px;
  box-shadow:0 12px 24px rgba(255,122,61,.36);z-index:3;animation:floatY 4s ease-in-out infinite;
}
@keyframes floatY{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}
.hero-ring{
  position:absolute;border-radius:50%;border:1.5px dashed rgba(24,100,255,.28);
  width:180px;height:180px;right:-52px;bottom:-58px;z-index:1;animation:spin 26s linear infinite;
}
@keyframes spin{to{transform:rotate(360deg)}}

/* ===== Section shared ===== */
.section{padding:80px 0}
.section-head{max-width:760px;margin:0 auto 46px;text-align:center}
.eyebrow{
  display:inline-block;font-size:13px;font-weight:700;letter-spacing:2px;color:var(--brand);
  background:var(--brand-soft);padding:5px 14px;border-radius:999px;margin-bottom:14px;
}
.section-head h2{font-size:34px;font-weight:800;letter-spacing:-.4px;color:#0a1a3c;margin-bottom:14px}
.section-head p{font-size:15.5px;color:var(--ink-3)}

/* ===== Stats ===== */
.stats-band{background:linear-gradient(135deg,#0f2f74,#123f9e 55%,#1864ff);padding:0}
.stats-inner{
  display:grid;grid-template-columns:repeat(4,1fr);gap:0;
  background:#fff;border-radius:20px;box-shadow:var(--shadow-lg);
  margin-top:-44px;position:relative;z-index:5;overflow:hidden;
}
.stat{padding:30px 24px;text-align:center;border-right:1px solid var(--line)}
.stat:last-child{border-right:none}
.stat b{display:block;font-size:34px;font-weight:800;color:var(--brand);line-height:1.2;letter-spacing:-.5px}
.stat span{font-size:13.5px;color:var(--ink-3)}

/* ===== About ===== */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:46px;align-items:start}
.about-text h2{font-size:32px;font-weight:800;color:#0a1a3c;margin-bottom:18px;letter-spacing:-.4px}
.about-text p{color:var(--ink-2);font-size:15.5px;margin-bottom:16px}
.about-list{display:grid;gap:12px;margin-top:22px}
.about-list li{
  display:flex;gap:12px;align-items:flex-start;background:#fff;border:1px solid var(--line);
  border-radius:12px;padding:13px 16px;font-size:14.5px;color:var(--ink-2);
  transition:transform .22s,box-shadow .22s;
}
.about-list li:hover{transform:translateX(4px);box-shadow:0 8px 20px rgba(16,42,96,.07)}
.dot-check{
  width:22px;height:22px;flex-shrink:0;border-radius:50%;background:var(--brand-soft);
  color:var(--brand);display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:800;margin-top:2px;
}
.about-cards{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.about-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px 20px;
  box-shadow:0 6px 16px rgba(16,42,96,.05);transition:transform .24s,box-shadow .24s;
}
.about-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.about-card .idx{font-size:12px;font-weight:800;color:var(--accent);letter-spacing:1px}
.about-card h3{font-size:16.5px;font-weight:700;margin:8px 0 6px;color:var(--ink)}
.about-card p{font-size:13.5px;color:var(--ink-3);line-height:1.65}

/* ===== Services ===== */
.services{background:linear-gradient(180deg,#f6f9ff,#eef4ff)}
.service-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.service-card{
  background:#fff;border-radius:var(--radius);padding:26px 24px;border:1px solid #e8eefb;
  box-shadow:0 6px 18px rgba(16,42,96,.05);transition:transform .25s ease,box-shadow .25s ease,border-color .25s;
  display:flex;flex-direction:column;gap:10px;
}
.service-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:#cbdcff}
.sc-icon{
  width:44px;height:44px;border-radius:12px;background:var(--brand-soft);color:var(--brand);
  display:flex;align-items:center;justify-content:center;font-weight:800;font-size:18px;
}
.service-card:nth-child(3n+2) .sc-icon{background:var(--accent-soft);color:#e05f22}
.service-card h3{font-size:17px;font-weight:700;color:var(--ink)}
.service-card p{font-size:14px;color:var(--ink-3);flex:1}

/* ===== One-stop ===== */
.onestop{background:#fff}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:10px}
.step{
  position:relative;background:var(--bg);border-radius:var(--radius);padding:26px 22px;
  border:1px solid #e9eefb;transition:transform .24s,box-shadow .24s;
}
.step:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.step .num{
  position:absolute;top:-14px;left:22px;width:34px;height:34px;border-radius:10px;
  background:linear-gradient(135deg,#2a7bff,#0b45c8);color:#fff;font-weight:800;font-size:14px;
  display:flex;align-items:center;justify-content:center;box-shadow:0 8px 18px rgba(24,100,255,.3);
}
.step h3{font-size:16px;font-weight:700;margin:14px 0 8px;color:var(--ink)}
.step p{font-size:13.5px;color:var(--ink-3)}

/* ===== 行业方案 tags ===== */
.solutions{background:linear-gradient(180deg,#f2f7ff,#f8fbff)}
.tag-cloud{display:flex;flex-wrap:wrap;gap:11px;justify-content:center;max-width:1000px;margin:0 auto}
.tag-cloud span{
  font-size:14px;color:var(--ink-2);background:#fff;border:1px solid #e4e9f2;
  padding:8px 16px;border-radius:999px;transition:.22s;cursor:default;
}
.tag-cloud span:hover{background:var(--brand);color:#fff;border-color:var(--brand);transform:translateY(-2px);box-shadow:0 8px 18px rgba(24,100,255,.24)}

/* ===== 服务网络 timeline ===== */
.network{background:#fff}
.timeline{position:relative;max-width:880px;margin:0 auto;padding-left:0}
.timeline::before{
  content:"";position:absolute;left:19px;top:6px;bottom:6px;width:2px;
  background:linear-gradient(180deg,#cfe0ff,#1864ff,#ffb28d);border-radius:2px;
}
.tl-item{position:relative;padding:0 0 26px 58px}
.tl-item:last-child{padding-bottom:0}
.tl-dot{
  position:absolute;left:10px;top:2px;width:20px;height:20px;border-radius:50%;
  background:#fff;border:3px solid var(--brand);box-shadow:0 0 0 4px rgba(24,100,255,.12);
}
.tl-item:nth-child(even) .tl-dot{border-color:var(--accent);box-shadow:0 0 0 4px rgba(255,122,61,.14)}
.tl-item h3{font-size:16.5px;font-weight:700;color:var(--ink);margin-bottom:5px}
.tl-item p{font-size:14px;color:var(--ink-3)}

/* ===== 对比评测 ===== */
.compare{background:linear-gradient(180deg,#eef4ff,#f6f9ff)}
.rate-card{
  background:#fff;border-radius:22px;box-shadow:var(--shadow);border:1px solid #e8eefb;
  padding:34px;margin-bottom:28px;display:grid;grid-template-columns:auto 1fr;gap:32px;align-items:center;
}
.rate-score{text-align:center;padding-right:32px;border-right:1px dashed #dbe5f7}
.rate-score .num{font-size:56px;font-weight:800;color:var(--brand);line-height:1;letter-spacing:-2px}
.rate-score .num small{font-size:20px;font-weight:600;color:var(--ink-3);letter-spacing:0}
.rate-score .full{font-size:13.5px;color:var(--ink-3);margin-top:8px}
.stars{color:#ffb100;font-size:20px;letter-spacing:3px;margin-bottom:8px}
.rate-info h3{font-size:22px;font-weight:800;color:#0a1a3c;margin-bottom:8px}
.rate-info p{font-size:14.5px;color:var(--ink-2)}
.table-scroll{overflow-x:auto;border-radius:18px;box-shadow:var(--shadow);background:#fff;border:1px solid #e8eefb}
table.compare-table{width:100%;border-collapse:collapse;min-width:720px}
.compare-table th,.compare-table td{padding:15px 18px;text-align:left;font-size:14px;border-bottom:1px solid var(--line)}
.compare-table thead th{
  background:linear-gradient(135deg,#0f2f74,#1864ff);color:#fff;font-weight:700;font-size:14px;
  position:sticky;top:0;
}
.compare-table tbody tr:last-child td{border-bottom:none}
.compare-table tbody tr:nth-child(even){background:#fafcff}
.compare-table td:first-child{font-weight:600;color:var(--ink)}
.good{color:#0a8f4e;font-weight:700}
.muted{color:var(--ink-3)}

/* ===== 案例中心 ===== */
.cases{background:#fff}
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.case-card{
  background:var(--bg);border-radius:var(--radius);overflow:hidden;border:1px solid #e9eefb;
  transition:transform .25s,box-shadow .25s;display:flex;flex-direction:column;
}
.case-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.case-media{aspect-ratio:16/10;overflow:hidden;background:#dfe9fb;display:flex;align-items:center;justify-content:center}
.case-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.case-card:hover .case-media img{transform:scale(1.05)}
.case-body{padding:20px;flex:1;display:flex;flex-direction:column;gap:8px}
.case-body .cat{font-size:12px;font-weight:700;color:var(--accent);letter-spacing:1px}
.case-body h3{font-size:16.5px;font-weight:700;color:var(--ink)}
.case-body p{font-size:13.5px;color:var(--ink-3);flex:1}

/* ===== 评论 ===== */
.reviews{background:linear-gradient(180deg,#f6f9ff,#eef4ff)}
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.review-card{
  background:#fff;border-radius:var(--radius);padding:24px;border:1px solid #e8eefb;
  box-shadow:0 6px 18px rgba(16,42,96,.05);transition:transform .24s,box-shadow .24s;
  display:flex;flex-direction:column;gap:14px;
}
.review-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.review-text{font-size:14px;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 solid var(--line)}
.avatar{
  width:40px;height:40px;border-radius:50%;background:var(--brand);color:#fff;
  display:flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;flex-shrink:0;
}
.review-card:nth-child(even) .avatar{background:var(--accent)}
.review-user strong{display:block;font-size:14px;color:var(--ink)}
.review-user span{font-size:12.5px;color:var(--ink-3)}

/* ===== Token 比价 ===== */
.token{background:#fff}
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.price-card{
  border:1px solid #e8eefb;border-radius:var(--radius);padding:26px 24px;background:var(--bg);
  transition:transform .24s,box-shadow .24s;display:flex;flex-direction:column;gap:12px;
}
.price-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.price-card.hot{border:2px solid var(--brand);background:linear-gradient(180deg,#f5f9ff,#fff);box-shadow:0 16px 34px rgba(24,100,255,.14)}
.price-card h3{font-size:17px;font-weight:700;color:var(--ink)}
.price-card .sub{font-size:13px;color:var(--ink-3)}
.price-tag{font-size:30px;font-weight:800;color:var(--brand);letter-spacing:-1px;line-height:1.2}
.price-tag small{font-size:13px;font-weight:600;color:var(--ink-3);letter-spacing:0}
.price-list{display:grid;gap:8px;font-size:13.5px;color:var(--ink-2)}
.price-list li{display:flex;gap:8px;align-items:flex-start}
.price-list li::before{content:"✓";color:var(--brand);font-weight:800;flex-shrink:0}

/* ===== 帮助中心 / FAQ ===== */
.help{background:linear-gradient(180deg,#eef4ff,#f6f9ff)}
.faq-wrap{max-width:900px;margin:0 auto;display:grid;gap:12px}
.faq-item{background:#fff;border:1px solid #e4e9f2;border-radius:14px;overflow:hidden;transition:box-shadow .22s,border-color .22s}
.faq-item.open{box-shadow:var(--shadow);border-color:#c5d8ff}
.faq-q{
  width:100%;background:none;border:none;cursor:pointer;font-family:inherit;text-align:left;
  padding:18px 22px;display:flex;justify-content:space-between;align-items:center;gap:16px;
  font-size:15px;font-weight:600;color:var(--ink);
}
.faq-q:hover{color:var(--brand)}
.faq-icon{
  width:26px;height:26px;border-radius:50%;background:var(--brand-soft);color:var(--brand);
  display:flex;align-items:center;justify-content:center;font-weight:800;font-size:16px;flex-shrink:0;
  transition:transform .28s ease,background .28s;
}
.faq-item.open .faq-icon{transform:rotate(45deg);background:var(--brand);color:#fff}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-a-inner{padding:0 22px 20px;font-size:14px;color:var(--ink-2);line-height:1.8}

/* ===== 需求匹配表单 ===== */
.contact{background:#fff}
.contact-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:44px;align-items:start}
.contact-info h2{font-size:30px;font-weight:800;color:#0a1a3c;margin-bottom:16px;letter-spacing:-.4px}
.contact-info p{font-size:15px;color:var(--ink-2);margin-bottom:24px}
.contact-methods{display:grid;gap:12px}
.cm-item{
  display:flex;gap:14px;align-items:center;background:var(--bg);border:1px solid #e9eefb;
  border-radius:12px;padding:14px 18px;transition:transform .2s,box-shadow .2s;
}
.cm-item:hover{transform:translateX(4px);box-shadow:0 8px 18px rgba(16,42,96,.07)}
.cm-icon{
  width:38px;height:38px;border-radius:10px;background:var(--brand-soft);color:var(--brand);
  display:flex;align-items:center;justify-content:center;font-weight:800;flex-shrink:0;font-size:14px;
}
.cm-item .label{font-size:12.5px;color:var(--ink-3)}
.cm-item .value{font-size:14.5px;font-weight:600;color:var(--ink);word-break:break-all}
.form-box{
  background:#fff;border:1px solid #e8eefb;border-radius:20px;padding:32px;box-shadow:var(--shadow-lg);
}
.form-box h3{font-size:20px;font-weight:800;color:#0a1a3c;margin-bottom:6px}
.form-box .form-tip{font-size:13.5px;color:var(--ink-3);margin-bottom:22px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:16px}
.field label{display:block;font-size:13px;font-weight:600;color:var(--ink-2);margin-bottom:6px}
.field input,.field select,.field textarea{
  width:100%;border:1.5px solid #dde5f2;border-radius:10px;padding:11px 14px;
  font-family:inherit;font-size:14px;color:var(--ink);background:#fbfdff;transition:.2s;outline:none;
}
.field input:focus,.field select:focus,.field textarea:focus{
  border-color:var(--brand);background:#fff;box-shadow:0 0 0 4px rgba(24,100,255,.1);
}
.field textarea{resize:vertical;min-height:110px}
.form-full{margin-bottom:18px}
.form-box .btn{width:100%;padding:14px;font-size:15.5px}
.form-note{font-size:12.5px;color:var(--ink-3);text-align:center;margin-top:12px}

/* ===== 文章 ===== */
.articles{background:linear-gradient(180deg,#f6f9ff,#eef4ff)}
.article-list{display:grid;gap:14px;max-width:900px;margin:0 auto}
.article-item{
  display:flex;justify-content:space-between;align-items:center;gap:18px;
  background:#fff;border:1px solid #e8eefb;border-radius:14px;padding:18px 24px;
  transition:transform .22s,box-shadow .22s,border-color .22s;
}
.article-item:hover{transform:translateX(5px);box-shadow:var(--shadow);border-color:#c5d8ff}
.article-item h3{font-size:15.5px;font-weight:600;color:var(--ink)}
.article-item .meta{font-size:12.5px;color:var(--ink-3);flex-shrink:0}

/* ===== 加盟 & 百科 ===== */
.join{background:#fff}
.join-banner{
  background:linear-gradient(135deg,#0f2f74,#123f9e 55%,#1864ff);
  border-radius:24px;padding:52px 44px;color:#fff;position:relative;overflow:hidden;
}
.join-banner::before{
  content:"";position:absolute;right:-60px;top:-60px;width:260px;height:260px;border-radius:50%;
  background:rgba(255,255,255,.08);
}
.join-banner::after{
  content:"";position:absolute;right:60px;bottom:-80px;width:180px;height:180px;border-radius:50%;
  background:rgba(255,122,61,.22);
}
.join-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.4fr 1fr;gap:32px;align-items:center}
.join-banner h2{font-size:30px;font-weight:800;margin-bottom:12px;letter-spacing:-.4px}
.join-banner p{font-size:15px;color:rgba(255,255,255,.86);max-width:560px}
.join-points{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.join-points span{font-size:13px;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.22);padding:6px 14px;border-radius:999px}
.join-cta{display:flex;flex-direction:column;gap:12px;position:relative;z-index:2}
.join-cta .btn{width:100%;padding:14px}
.join-cta .btn-ghost{background:#fff;color:var(--brand-deep);border-color:#fff}
.join-cta .btn-ghost:hover{background:#eef4ff}

/* ===== 百科 / 文章 list ===== */
.wiki{background:linear-gradient(180deg,#f2f7ff,#f8fbff)}
.wiki-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.wiki-card{
  background:#fff;border:1px solid #e8eefb;border-radius:var(--radius);padding:24px;
  transition:transform .22s,box-shadow .22s;
}
.wiki-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.wiki-card h3{font-size:16px;font-weight:700;color:var(--ink);margin-bottom:8px}
.wiki-card p{font-size:13.5px;color:var(--ink-3)}

/* ===== Footer ===== */
.site-footer{background:#0b1a35;color:#c3cfe3;padding:56px 0 0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:36px;padding-bottom:38px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-brand .ai-page-logo{max-height:38px;width:auto}
.footer-brand strong{font-size:17px;color:#fff;font-weight:700}
.footer-desc{font-size:13.5px;line-height:1.8;color:#9db0cc;max-width:300px}
.footer-col h4{font-size:14.5px;color:#fff;font-weight:700;margin-bottom:16px}
.footer-col ul{display:grid;gap:10px}
.footer-col a{font-size:13.5px;color:#9db0cc;transition:color .2s}
.footer-col a:hover{color:#fff}
.footer-contact{font-size:13.5px;line-height:2;color:#9db0cc}
.footer-contact strong{color:#fff;font-weight:600}
.footer-friend{
  border-top:1px solid rgba(255,255,255,.09);padding:20px 0;
  display:flex;flex-wrap:wrap;gap:10px 20px;align-items:center;
}
.footer-friend .flabel{font-size:13px;color:#7d90ad;flex-shrink:0}
.footer-friend a{font-size:13px;color:#9db0cc;transition:color .2s}
.footer-friend a:hover{color:#fff}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.09);padding:20px 0;text-align:center;
  font-size:13px;color:#7d90ad;
}
.footer-bottom a{color:#9db0cc;margin:0 6px}
.footer-bottom a:hover{color:#fff}

/* ===== Floating ===== */
.float-btn{
  position:fixed;right:22px;bottom:26px;z-index:90;display:flex;flex-direction:column;gap:12px;
}
.fab{
  width:50px;height:50px;border-radius:50%;background:#fff;border:1px solid #e0e8f5;
  box-shadow:0 10px 24px rgba(16,42,96,.16);display:flex;align-items:center;justify-content:center;
  cursor:pointer;transition:transform .2s,box-shadow .2s,background .2s;color:var(--brand);
  font-size:12px;font-weight:700;flex-direction:column;gap:1px;
}
.fab:hover{transform:translateY(-3px);box-shadow:0 14px 30px rgba(24,100,255,.28);background:var(--brand-soft)}
.fab.primary{background:var(--brand);color:#fff;border-color:var(--brand)}
.fab.primary:hover{background:var(--brand-deep)}
.kefu-pop{
  position:fixed;right:22px;bottom:90px;z-index:95;background:#fff;border-radius:16px;
  padding:16px;box-shadow:var(--shadow-lg);border:1px solid #e4e9f2;width:200px;
  opacity:0;visibility:hidden;transform:translateY(10px);transition:.28s;
}
.kefu-pop.show{opacity:1;visibility:visible;transform:translateY(0)}
.kefu-pop img{width:100%;border-radius:10px;margin-bottom:8px}
.kefu-pop p{font-size:12.5px;color:var(--ink-3);text-align:center}

/* ===== Reveal anim ===== */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:translateY(0)}

/* ===== Promo strip ===== */
.promo{background:linear-gradient(180deg,#fff,#f6f9ff)}
.promo-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:20px}
.promo-main{
  border-radius:var(--radius);overflow:hidden;border:1px solid #e8eefb;background:#fff;
  box-shadow:var(--shadow);display:flex;flex-direction:column;
}
.promo-main img{width:100%;aspect-ratio:16/7;object-fit:cover}
.promo-main .pm-body{padding:20px 22px}
.promo-main h3{font-size:17px;font-weight:700;color:var(--ink);margin-bottom:6px}
.promo-main p{font-size:13.5px;color:var(--ink-3)}
.promo-side{display:grid;gap:20px}
.promo-small{
  border-radius:var(--radius);overflow:hidden;border:1px solid #e8eefb;background:#fff;
  box-shadow:0 6px 18px rgba(16,42,96,.06);transition:transform .24s,box-shadow .24s;
  display:flex;flex-direction:column;
}
.promo-small:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.promo-small img{width:100%;aspect-ratio:16/9;object-fit:cover}
.promo-small .ps-body{padding:16px 18px}
.promo-small h3{font-size:15px;font-weight:700;color:var(--ink);margin-bottom:4px}
.promo-small p{font-size:13px;color:var(--ink-3)}

/* ===== Responsive ===== */
@media (max-width:1080px){
  .hero h1{font-size:38px}
  .service-grid{grid-template-columns:repeat(2,1fr)}
  .review-grid{grid-template-columns:repeat(2,1fr)}
  .case-grid,.wiki-grid{grid-template-columns:repeat(2,1fr)}
  .stats-inner{grid-template-columns:repeat(2,1fr)}
  .stat:nth-child(2){border-right:none}
  .stat:nth-child(1),.stat:nth-child(2){border-bottom:1px solid var(--line)}
  .promo-grid{grid-template-columns:1fr 1fr}
  .promo-main{grid-column:1/-1}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:900px){
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero-visual{max-width:520px}
  .about-grid{grid-template-columns:1fr;gap:36px}
  .steps{grid-template-columns:repeat(2,1fr)}
  .contact-grid{grid-template-columns:1fr}
  .join-inner{grid-template-columns:1fr}
  .rate-card{grid-template-columns:1fr;text-align:center;gap:20px;padding:28px}
  .rate-score{padding-right:0;border-right:none;padding-bottom:20px;border-bottom:1px dashed #dbe5f7}
  .nav-links,.nav-cta .btn-ghost{display:none}
  .nav-toggle{display:flex}
  .nav-links.mobile-open{
    display:flex;position:absolute;top:100%;left:0;right:0;background:#fff;
    flex-direction:column;align-items:stretch;padding:12px 20px 20px;
    border-bottom:1px solid var(--line);box-shadow:0 16px 30px rgba(16,42,96,.1);
    gap:0;
  }
  .nav-links.mobile-open a{padding:12px 8px;border-bottom:1px solid #f0f4fb;font-size:15px}
}
@media (max-width:640px){
  .section{padding:58px 0}
  .hero{padding:48px 0 60px}
  .hero h1{font-size:29px}
  .hero-desc{font-size:15px}
  .section-head h2{font-size:25px}
  .service-grid,.review-grid,.case-grid,.wiki-grid,.price-grid{grid-template-columns:1fr}
  .about-cards{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .stats-inner{grid-template-columns:1fr}
  .stat{border-right:none;border-bottom:1px solid var(--line)}
  .stat:last-child{border-bottom:none}
  .form-row{grid-template-columns:1fr}
  .form-box{padding:24px 20px}
  .promo-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .join-banner{padding:36px 24px}
  .join-banner h2{font-size:23px}
  .article-item{flex-direction:column;align-items:flex-start;gap:6px}
  .mini-models{grid-template-columns:1fr}
  .hero-float{right:8px;top:-12px;font-size:12px}
  .float-btn{right:14px;bottom:18px}
  .kefu-pop{right:14px;bottom:82px}
  .compare-table th,.compare-table td{padding:12px 14px;font-size:13px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}