:root{--main:#E01B1B;--dark:#A31414;--ink:#0F1115;--bg:#F6F6F7;--txt:#4A4F57}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:'HarmonyOS Sans SC','PingFang SC','Microsoft YaHei',Inter,'Helvetica Neue',Arial,sans-serif;color:var(--txt);line-height:1.7;background:#fff}
a{color:inherit;text-decoration:none}img,svg{max-width:100%;height:auto;display:block}
.wrap{max-width:1120px;margin:0 auto;padding:0 24px}
header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);backdrop-filter:blur(8px);border-bottom:1px solid #e8e8ea}
.nav{display:flex;align-items:center;gap:40px;height:64px}
.nav img{height:34px}
.nav a.nl{font-size:.95rem;color:var(--ink);position:relative;padding:4px 0}
.nav a.nl:hover::after{content:'';position:absolute;left:0;right:0;bottom:-2px;height:2px;background:var(--main)}
.nav .lang{font-size:.85rem;border:1px solid #d8dbdf;border-radius:16px;padding:3px 12px;cursor:pointer;background:#fff;color:var(--ink);text-decoration:none;display:inline-block;margin-left:6px}
.nav .lang:hover{border-color:var(--main);color:var(--main)}
.nav .lang.on{background:var(--main);border-color:var(--main);color:#fff;cursor:default}
#lang-menu.open{display:block!important}
.nav .cta{background:var(--main);color:#fff;padding:9px 20px;border-radius:8px;font-weight:600;font-size:.9rem}
.nav .cta:hover{background:var(--dark)}
.hero{background:var(--ink);color:#fff;padding:92px 0 84px}
.hero h1{font-size:2.6rem;line-height:1.25;letter-spacing:.5px}
.hero h1 b{color:var(--main)}
.hero .hen{display:block;color:#8f959d;font-size:.55em;margin-top:10px;font-weight:400}
.hero p.sub{margin:18px 0 30px;max-width:660px;color:#b9bec6;font-size:1.02rem}
.hero .btns{display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-block;padding:13px 28px;border-radius:8px;font-weight:600}
.btn.p{background:var(--main);color:#fff}.btn.p:hover{background:var(--dark)}
.btn.s{border:1px solid #3a3f47;color:#fff}.btn.s:hover{border-color:var(--main);color:var(--main)}
.btn.g{border:1px solid #d8dbdf;color:var(--ink)}.btn.g:hover{border-color:var(--main);color:var(--main)}
.trust{display:flex;gap:12px;flex-wrap:wrap;margin-top:32px}
.trust span{font-size:.82rem;color:#dfe3e8;border:1px solid #333941;padding:5px 14px;border-radius:20px}
section{padding:78px 0}section.alt{background:var(--bg)}
h2.sec{font-size:1.85rem;color:var(--ink);margin-bottom:10px}
p.secs{color:#8a9099;margin-bottom:42px}
.cards3{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:22px}
.sup-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
@media(max-width:1080px){.sup-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.sup-grid{grid-template-columns:1fr}}
.sup-card{background:#fff;border:1px solid #e8e8ea;border-radius:12px;padding:20px 18px;box-shadow:0 2px 12px rgba(15,17,21,.05);transition:.2s}
.sup-card:hover{border-color:var(--main);transform:translateY(-2px)}
.sup-card h4{color:var(--ink);font-size:.95rem;margin-bottom:8px;display:flex;align-items:center;gap:8px}
.sup-card h4 .n{display:inline-flex;width:26px;height:26px;border-radius:50%;background:var(--main);color:#fff;align-items:center;justify-content:center;font-size:.75rem;flex-shrink:0}
.sup-card p{font-size:.84rem;line-height:1.55;color:var(--txt)}
.card{background:#fff;border:1px solid #e8e8ea;border-radius:12px;padding:28px 24px;box-shadow:0 2px 12px rgba(15,17,21,.05);transition:.2s}
.card:hover{border-color:var(--main);transform:translateY(-2px)}
.card h3{color:var(--ink);font-size:1.15rem;margin-bottom:8px}
.card .en{color:#9aa0a8;font-size:.84rem;display:block;margin-bottom:10px}
.card .tags{margin-top:14px;display:flex;gap:8px;flex-wrap:wrap}
.card .tags i{font-style:normal;font-size:.74rem;background:#fdecec;color:var(--dark);padding:2px 10px;border-radius:12px}
.pgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
@media(max-width:1080px){.pgrid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.pgrid{grid-template-columns:1fr}}
.pcard img,.pcard svg{border-radius:10px;background:linear-gradient(160deg,#fafbfc,#e9edf1);aspect-ratio:3/2;object-fit:cover}
.pcard h3{color:var(--ink);margin:16px 0 2px;font-size:1.1rem}
.pcard .en{color:#9aa0a8;font-size:.82rem}
.pcard p{margin-top:8px;font-size:.92rem}
.pcard .go{display:inline-block;margin-top:12px;color:var(--main);font-weight:600;font-size:.9rem}
table.cmp{width:100%;border-collapse:collapse;background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 2px 12px rgba(15,17,21,.05)}
table.cmp th,table.cmp td{padding:13px 18px;border-bottom:1px solid #eef0f2;text-align:left;font-size:.93rem}
table.cmp th{background:var(--ink);color:#fff;font-weight:600}
table.cmp td:first-child{color:var(--ink);font-weight:600}
table.cmp td:nth-child(2){color:#9aa0a8}
table.cmp td:last-child{color:var(--dark)}
.banner{background:var(--main);color:#fff;padding:50px 0;text-align:center}
.banner h3{font-size:1.45rem;margin-bottom:8px}
.banner p{color:#ffd9d9;margin-bottom:20px}
.banner a{background:#fff;color:var(--main);padding:12px 30px;border-radius:8px;font-weight:700;display:inline-block}
footer{background:var(--ink);color:#8a9099;padding:42px 0;font-size:.84rem}
footer .f{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;align-items:center}
footer b{color:#fff}
.crumb{font-size:.85rem;color:#9aa0a8;margin-bottom:16px}
.pd{display:grid;grid-template-columns:1fr 1fr;gap:42px;align-items:start}
.pd .img{background:linear-gradient(160deg,#fafbfc,#e9edf1);border-radius:12px;padding:18px}
.pd ul{list-style:none;margin:20px 0}
.pd ul li{padding:10px 0 10px 28px;position:relative;border-bottom:1px dashed #eef0f2}
.pd ul li::before{content:'✓';position:absolute;left:0;color:var(--main);font-weight:700}
.daas{background:var(--bg);border-left:4px solid var(--main);padding:16px 20px;border-radius:10px;font-size:.92rem;margin:26px 0}
.scene{margin-top:24px}.scene img{border-radius:12px}
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px}
.step{background:#fff;border:1px solid #e8e8ea;border-radius:12px;padding:22px}
.step b{display:inline-flex;width:34px;height:34px;border-radius:50%;background:var(--main);color:#fff;align-items:center;justify-content:center;margin-bottom:10px}
.faq details{background:#fff;border:1px solid #e8e8ea;border-radius:10px;padding:14px 18px;margin-bottom:10px}
.faq summary{cursor:pointer;font-weight:600;color:var(--ink)}

.tel-links{display:flex;gap:12px;flex-wrap:wrap;margin-top:14px}
.tel-links a{display:inline-flex;align-items:center;gap:6px;padding:7px 16px;border-radius:8px;font-size:.88rem;font-weight:600;text-decoration:none;transition:.15s}
.tel-links a[href^="tel:"]{background:var(--main);color:#fff}
.tel-links a[href^="tel:"]:hover{background:var(--dark)}
.tel-links a[href^="sms:"]{border:1.5px solid var(--main);color:var(--main);background:transparent}
.tel-links a[href^="sms:"]:hover{background:#fdecec}

/* ── Mobile Responsive ── */
.nav-brand{display:flex;align-items:center;gap:8px;text-decoration:none;flex-shrink:0}
.nav-brand img{height:32px}
.nav-brand span{font-size:1rem;font-weight:700;color:var(--ink);white-space:nowrap}
.nav-links{display:flex;align-items:center;gap:36px;flex:1;justify-content:center;margin:0 20px}
.nav-links a.nl{padding:8px 18px;border-radius:6px;font-size:.95rem;transition:.15s;white-space:nowrap}
.nav-links a.nl:hover{background:var(--bg);color:var(--main)}
.nav-links a.nl::after{content:'';display:block;height:2px;background:var(--main);border-radius:1px;transform:scaleX(0);transition:transform .2s;margin-top:2px}
.nav-links a.nl:hover::after{transform:scaleX(1)}
/* 产品▾分组下拉（2026-10-09 对齐 3510.biz） */
.nav-links .has-drop{position:relative;display:inline-flex;align-items:center}
.nav-links .has-drop>a .caret{font-size:.7em;margin-left:4px;color:#8aa0ad}
.nav-links .drop{display:none;position:absolute;top:calc(100% + 8px);left:50%;transform:translateX(-50%);background:#fff;border:1px solid #e8e8ea;border-radius:10px;box-shadow:0 14px 36px rgba(15,43,60,.14);padding:8px 10px;min-width:240px;z-index:200;flex-direction:column;gap:2px;max-height:calc(100vh - 80px);overflow-y:auto}
.nav-links .has-drop:hover .drop,.nav-links .has-drop.open .drop{display:flex}
.nav-links .drop a.nl{padding:8px 18px;font-size:.9rem;white-space:nowrap;display:block;width:100%;box-sizing:border-box}
.nav-links .dg-logo{display:flex;align-items:center;gap:7px;font-size:.72rem;color:#8aa0ad;font-weight:700;letter-spacing:.05em;margin:6px 8px 2px}
.nav-right{display:flex;align-items:center;gap:16px;margin-left:auto}
.burger{display:none;flex-direction:column;gap:4px;background:none;border:none;cursor:pointer;padding:6px}
.burger span{width:22px;height:2.5px;background:var(--ink);border-radius:2px;transition:.2s}
.hero h1 .hen{display:block;color:#8f959d;font-size:.55em;margin-top:8px;font-weight:400;text-wrap:balance}
.hero .btns{display:flex;gap:14px;flex-wrap:wrap}
.hero .btns .btn{min-width:140px;text-align:center}
.trust span{font-size:.78rem}

@media(max-width:1080px){
  .pgrid{grid-template-columns:repeat(2,1fr)}
  .sup-grid{grid-template-columns:repeat(2,1fr)}
}

/* nav 折叠=1080（2026-10-09 tom 两轮判例：①768 挤压变形②1024 gap16 中间密两头空=视觉不均衡——nav 与 sup-grid 同断点折叠；页面布局仍 820） */
@media(max-width:1080px){
  .nav-links{display:none;position:absolute;top:64px;left:0;right:0;background:#fff;border-bottom:1px solid #e8e8ea;flex-direction:column;padding:16px 24px;gap:14px;z-index:100;box-shadow:0 4px 12px rgba(0,0,0,.08)}
  .nav-links.open{display:flex}
  .nav-links a.nl{font-size:1rem;padding:6px 0}
  .burger{display:flex}
  .nav-right .cta{display:none}
  .nav-right{gap:8px}
}

@media(max-width:820px){
  .pd{grid-template-columns:1fr}
  .hero h1{font-size:1.7rem;line-height:1.35}
  .hero h1 .hen{font-size:.5em}
  .hero p.sub{font-size:.92rem}
  .hero{padding:60px 0 50px}
  section{padding:50px 0}
  h2.sec{font-size:1.45rem}
  .cards3{grid-template-columns:1fr}
  .trust span{padding:4px 12px}
  .hero .btns{flex-direction:column;width:100%;max-width:280px}
  .hero .btns .btn{width:100%;text-align:center;padding:13px 0}

  /* Cards & grids */
  .pgrid{grid-template-columns:1fr}
  .sup-grid{grid-template-columns:1fr}
  .card,.sup-card,.step{padding:18px 16px}
  table.cmp{font-size:.82rem}
  table.cmp th,table.cmp td{padding:10px 10px}
  .banner{padding:36px 0}
  .banner h3{font-size:1.2rem}
  .tel-links{flex-direction:column;gap:8px}
  .tel-links a{width:100%;justify-content:center;text-align:center}
  footer .f{flex-direction:column;gap:12px;text-align:center}
}

@media(max-width:640px){
  .pgrid{grid-template-columns:1fr}
  .sup-grid{grid-template-columns:1fr}
  .wrap{padding:0 16px}
  .hero h1{font-size:1.45rem}
  .crumb{font-size:.78rem;word-break:break-all}
  .daas{font-size:.85rem;padding:12px 14px}
}