:root{
  --brand:#0E7C86;
  --accent:#F2A900;
  --brand-deep: color-mix(in srgb, var(--brand), #000 26%);
  --brand-light: color-mix(in srgb, var(--brand), #fff 86%);
  --ink:#1A2B30;
  --ink-soft:#4A5C61;
  --line:#DDE7E9;
  --bg:#FFFFFF;
  --bg-soft:#F6FAFB;
  --radius:16px;
  --shadow:0 10px 30px rgba(14,124,134,.10);
  --maxw:1120px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.7;-webkit-font-smoothing:antialiased;
}
h1,h2,h3{font-family:"Noto Serif SC","Noto Sans SC","Source Han Serif SC",serif;font-weight:900;line-height:1.25;letter-spacing:.5px}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.btn{
  display:inline-block;padding:14px 30px;border-radius:999px;font-weight:700;font-size:16px;
  transition:.25s transform,.25s box-shadow,.25s background;cursor:pointer;border:none;
}
.btn-primary{background:var(--accent);color:#3a2a00;box-shadow:0 8px 20px rgba(242,169,0,.35)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 26px rgba(242,169,0,.45)}
.btn-ghost{background:transparent;color:var(--brand-deep);border:2px solid var(--brand)}
.btn-ghost:hover{background:var(--brand-light)}

header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.9);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:66px}
.logo{font-family:"Noto Serif SC",serif;font-weight:900;font-size:22px;color:var(--brand-deep)}
.tld{color:var(--accent)}
.nav-links{display:flex;gap:28px;font-size:15px;color:var(--ink-soft);font-weight:500}
.nav-links a:hover{color:var(--brand)}
.nav-cta{font-size:14px;padding:10px 22px}
@media(max-width:760px){.nav-links{display:none}}

.hero{position:relative;overflow:hidden;background:
    radial-gradient(1200px 500px at 80% -10%,var(--brand-light),transparent),
    linear-gradient(180deg,#F6FAFB 0%,#FFFFFF 100%);
    padding:84px 0 70px}
.hero .tag{display:inline-block;background:var(--brand-light);color:var(--brand-deep);font-weight:700;font-size:14px;padding:7px 16px;border-radius:999px;margin-bottom:22px}
.hero h1{font-size:clamp(40px,7vw,76px);color:var(--brand-deep);margin-bottom:8px}
.hero h1 .tld{color:var(--accent)}
.hero .pin{font-size:clamp(20px,3vw,30px);color:var(--ink);font-weight:700;margin-bottom:18px}
.hero p.lead{font-size:18px;color:var(--ink-soft);max-width:640px;margin-bottom:34px}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap}
.domain-card{
  margin-top:46px;background:linear-gradient(135deg,var(--brand) 0%,var(--brand-deep) 100%);
  color:#fff;border-radius:var(--radius);padding:30px 34px;box-shadow:var(--shadow);
  display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:18px
}
.domain-card .d-main{font-family:"Noto Serif SC",serif;font-weight:900;font-size:34px;letter-spacing:1px}
.domain-card .d-sub{font-size:15px;opacity:.9;margin-top:4px}
.domain-card .d-badge{background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.3);padding:10px 18px;border-radius:12px;font-weight:700}

section{padding:72px 0}
.sec-head{text-align:center;max-width:720px;margin:0 auto 46px}
.sec-head .kicker{color:var(--brand);font-weight:700;font-size:14px;letter-spacing:2px;text-transform:uppercase}
.sec-head h2{font-size:clamp(28px,4vw,40px);color:var(--brand-deep);margin:10px 0 14px}
.sec-head p{color:var(--ink-soft);font-size:17px}

.mean-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.mean-card{background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:.25s}
.mean-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--brand)}
.mean-card .m-word{font-family:"Noto Serif SC",serif;font-weight:900;font-size:26px;color:var(--brand-deep)}
.mean-card .m-tag{display:inline-block;font-size:12px;font-weight:700;padding:4px 12px;border-radius:999px;margin:12px 0}
.m-tag.main{background:var(--accent);color:#3a2a00}
.m-tag.alt{background:var(--brand-light);color:var(--brand-deep)}
.mean-card p{color:var(--ink-soft);font-size:15px}

.fit-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.fit-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:0 4px 14px rgba(0,0,0,.04)}
.fit-card .ic{width:48px;height:48px;border-radius:12px;background:var(--brand-light);color:var(--brand-deep);display:flex;align-items:center;justify-content:center;font-size:24px;margin-bottom:16px;font-family:"Noto Serif SC",serif;font-weight:900}
.fit-card h3{font-size:20px;color:var(--brand-deep);margin-bottom:8px}
.fit-card p{color:var(--ink-soft);font-size:15px}

.why-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.why-item{background:#fff;border-radius:var(--radius);padding:26px;border:1px solid var(--line)}
.why-item .num{font-family:"Noto Serif SC",serif;font-weight:900;font-size:30px;color:var(--accent);margin-bottom:6px}
.why-item h3{font-size:18px;color:var(--brand-deep);margin-bottom:6px}
.why-item p{color:var(--ink-soft);font-size:14px}

.stats{background:linear-gradient(135deg,var(--brand-deep) 0%,var(--brand) 100%);color:#fff}
.stats .wrap{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;text-align:center}
.stat .s-num{font-family:"Noto Serif SC",serif;font-weight:900;font-size:42px}
.stat .s-lab{font-size:15px;opacity:.9;margin-top:6px}

/* 平板及以上 (≥768px)：含义/价值/数据 4 张用 4 列；契合保持 2 列（6 张 3x2 整齐） */
@media (min-width:768px){
  .mean-grid{grid-template-columns:repeat(4,1fr)}
  .why-grid{grid-template-columns:repeat(4,1fr)}
  .stats .wrap{grid-template-columns:repeat(4,1fr)}
}
/* 桌面 (≥1024px)：契合 6 张改 3 列（2x3），更舒展 */
@media (min-width:1024px){
  .fit-grid{grid-template-columns:repeat(3,1fr)}
}

.cta{background:var(--bg)}
.cta-box{background:linear-gradient(135deg,var(--brand-deep),var(--brand));border-radius:24px;padding:54px 40px;text-align:center;color:#fff;box-shadow:var(--shadow)}
.cta-box h2{color:#fff;font-size:clamp(26px,4vw,38px);margin-bottom:14px}
.cta-box p{opacity:.92;font-size:17px;margin-bottom:32px;max-width:560px;margin-left:auto;margin-right:auto}
.cta-actions{display:flex;flex-direction:column;align-items:center;gap:0}
.cta-box .btn-primary{background:#fff;color:var(--brand-deep);box-shadow:0 8px 20px rgba(0,0,0,.18);font-size:17px;padding:14px 38px}
.cta-box .btn-primary:hover{transform:translateY(-2px)}
.cta-divider{display:flex;align-items:center;justify-content:center;gap:14px;margin:22px auto 18px;max-width:260px;color:rgba(255,255,255,.75);font-size:13px;letter-spacing:2px}
.cta-divider::before,.cta-divider::after{content:"";flex:1;height:1px;background:rgba(255,255,255,.4)}
.qr-block{display:flex;flex-direction:column;align-items:center;gap:8px}
.qr-block img{width:160px;height:160px;object-fit:cover;border-radius:12px;background:#fff;padding:8px;border:1px solid rgba(255,255,255,.4)}
.qr-cap{font-size:14px;opacity:.9}
.contact-row{margin-top:28px;font-size:15px;opacity:.9;padding-top:22px;border-top:1px solid rgba(255,255,255,.25);max-width:560px;margin-left:auto;margin-right:auto}
.contact-row b{color:var(--accent)}

footer{background:var(--brand-deep);color:rgba(255,255,255,.8);padding:34px 0;font-size:14px}
footer .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:14px;align-items:center}
footer a{color:#fff}
.font-note{font-size:13px;opacity:.7;margin-top:6px}

.pin-line{text-align:center;font-family:"Noto Serif SC",serif;font-weight:700;font-size:22px;color:var(--brand-deep);margin:0 auto;max-width:760px}
.pin-line .u{border-bottom:3px solid var(--accent);padding-bottom:2px}