/* 快答客服官网落地页（Solvio 浅色风格） */
:root{--blue:#2563eb;--blue-d:#1d4ed8;--blue-bg:#dbeafe;--blue-bg2:#eff6ff;--green:#10b981;--green-bg:#d1fae5;--orange:#f59e0b;--orange-bg:#fef3c7;--ink:#111827;--ink2:#374151;--dim:#6b7280;--dim2:#9ca3af;--line:#e5e7eb;--gray:#f3f4f6;--purple:#8b5cf6}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);font-size:15px;line-height:1.7;background:#fff}
a{text-decoration:none}
.nav{border-bottom:1px solid var(--line);position:sticky;top:0;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);z-index:50}
.nav-in{max-width:1080px;margin:0 auto;padding:0 20px;height:64px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.logo{display:flex;align-items:center;gap:9px;font-weight:700;font-size:17px;color:var(--ink)}
.logo-mark{width:34px;height:34px;border-radius:9px;background:linear-gradient(135deg,var(--blue),var(--purple));color:#fff;display:flex;align-items:center;justify-content:center;font-size:15px}
.nav-links{display:flex;gap:26px;font-size:14px}
.nav-links a{color:var(--dim)}
.nav-links a:hover{color:var(--blue)}
.nav-cta{display:flex;gap:10px;align-items:center}
.btn{display:inline-flex;align-items:center;justify-content:center;border-radius:10px;font-size:14px;padding:10px 22px;cursor:pointer;border:1px solid transparent;transition:.15s;text-decoration:none}
.btn.primary{background:var(--blue);color:#fff;box-shadow:0 6px 18px rgba(37,99,235,.3)}
.btn.primary:hover{background:var(--blue-d);transform:translateY(-1px)}
.btn.ghost{border-color:var(--line);color:var(--ink2);background:#fff}
.btn.ghost:hover{border-color:var(--blue);color:var(--blue)}
.btn.big{padding:13px 30px;font-size:15px}
/* hero */
.hero{padding:72px 20px 60px;background:linear-gradient(180deg,#fff 0%,var(--blue-bg2) 100%)}
.hero-in{max-width:880px;margin:0 auto;text-align:center}
.hero-badge{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;color:#047857;background:var(--green-bg);border-radius:999px;padding:5px 15px;margin-bottom:22px}
.hero h1{font-size:40px;line-height:1.3;font-weight:700;letter-spacing:.5px}
.hero h1 strong{color:var(--blue)}
.lead{margin:20px auto 32px;color:var(--dim);font-size:16px;max-width:600px}
.hero-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.hero-feats{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;max-width:820px;margin:44px auto 0}
.feat{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px 16px;text-align:left}
.f-ico{font-size:20px}
.feat b{display:block;font-size:14px;margin-top:6px}
.feat i{font-style:normal;font-size:12.5px;color:var(--dim2)}
/* mock */
.mock{max-width:760px;margin:46px auto 0;background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:0 24px 70px rgba(17,24,39,.12);overflow:hidden;text-align:left}
.mock-bar{background:var(--gray);padding:10px 14px;display:flex;align-items:center;gap:7px}
.mock-bar span{width:11px;height:11px;border-radius:50%;background:#d1d5db}
.mock-bar span:first-child{background:#f87171}
.mock-bar i{font-style:normal;margin-left:10px;font-size:12px;color:var(--dim2);background:#fff;border-radius:6px;padding:3px 14px}
.mock-body{padding:20px 22px}
.mock-row{display:flex;gap:12px;align-items:center;margin-bottom:14px}
.m-badge{font-size:11.5px;padding:3px 11px;border-radius:999px;background:var(--orange-bg);color:#b45309;font-weight:500}
.m-main b{display:block;font-size:15px}
.m-main i{font-style:normal;font-size:12px;color:var(--dim2)}
.mock-steps{display:flex;gap:0;max-width:460px;margin:4px 0 18px}
.mock-steps span{flex:1;font-size:11.5px;color:var(--dim2);border-top:4px solid var(--line);padding-top:6px;margin-right:4px}
.mock-steps span.on{border-color:var(--blue);color:var(--blue-d)}
.mock-steps span.cur{font-weight:700}
.mock-msgs .mm{border:1px solid var(--line);border-radius:11px;padding:10px 14px;margin-bottom:10px;font-size:13px;background:#f9fafb;max-width:86%}
.mock-msgs .mm.me{background:var(--blue-bg2);border-color:var(--blue-bg);margin-left:auto}
.mock-msgs .mm i{display:block;font-size:11px;color:var(--dim2);font-style:normal;margin-bottom:3px}
/* section */
.section{padding:76px 20px}
.section.alt{background:var(--gray)}
.sec-in{max-width:1080px;margin:0 auto}
.sec-head{text-align:center;margin-bottom:44px}
.kicker{color:var(--blue);font-size:12.5px;letter-spacing:3px;font-weight:700}
.sec-head h2{font-size:30px;margin-top:10px}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.step{background:#fff;border:1px solid var(--line);border-radius:15px;padding:26px 22px;position:relative}
.step i{font-style:normal;font-size:34px;font-weight:700;color:var(--blue-bg);font-family:Georgia,serif;position:absolute;top:16px;right:20px}
.step h3{font-size:16.5px;margin-bottom:8px}
.step p{color:var(--dim);font-size:13.5px}
.b-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.b-item{background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px 18px}
.b-item b{font-size:14.5px}
.b-item p{color:var(--dim);font-size:13px;margin-top:6px}
.stats-band{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:34px;background:var(--ink);border-radius:16px;padding:28px 20px}
.sb{text-align:center}
.sb b{display:block;font-size:30px;color:#fff;font-weight:700}
.sb i{font-style:normal;font-size:12.5px;color:rgba(255,255,255,.55)}
/* cta */
.cta{background:linear-gradient(180deg,var(--blue-bg2),#fff);padding:80px 20px;text-align:center}
.cta h2{font-size:28px}
.cta p{color:var(--dim);margin:12px 0 30px}
.cta .hero-actions{margin-top:8px}
/* footer */
.footer{border-top:1px solid var(--line);padding:44px 20px 30px;background:#fff}
.f-cols{display:grid;grid-template-columns:2fr 1fr 1fr;gap:30px;max-width:1080px;margin:0 auto}
.f-cols b{font-size:15px}
.f-cols p{color:var(--dim);font-size:13px;margin-top:8px}
.f-cols a{display:block;color:var(--dim);font-size:13.5px;margin-top:8px}
.f-cols a:hover{color:var(--blue)}
.f-bottom{max-width:1080px;margin:26px auto 0;border-top:1px solid var(--line);padding-top:20px;text-align:center;color:var(--dim2);font-size:12.5px}
@media(max-width:860px){
  .hero h1{font-size:29px}
  .hero-feats,.steps,.b-grid,.stats-band{grid-template-columns:1fr 1fr}
  .f-cols{grid-template-columns:1fr}
  .nav-links{display:none}
}
@media(max-width:560px){
  .hero-feats,.steps,.b-grid,.stats-band{grid-template-columns:1fr}
  .btn.big{width:100%}
  .nav-cta .btn{padding:8px 14px;font-size:13px}
}