/* =========================================================
   WPS Office 官网 - 商务简约风（站群第1套 · 根目录）
   设计基调：留白充足、克制配色、数字化编号排版
   ========================================================= */
:root{
  --primary:#1a56db;
  --primary-dark:#12409e;
  --primary-tint:#eaf0fd;
  --accent:#0d9488;
  --ink:#0f172a;
  --ink-soft:#475569;
  --line:#e2e8f0;
  --bg:#ffffff;
  --bg-alt:#f8fafc;
  --radius:10px;
  --max:1180px;
}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  font-family:"Segoe UI","PingFang SC","Microsoft YaHei",-apple-system,BlinkMacSystemFont,sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.65;
  font-size:15px;
}
.container{max-width:var(--max);margin:0 auto;padding:0 24px;}
a{color:inherit;}
img,svg{display:block;}

/* ---------- 顶部导航 ---------- */
header{
  position:sticky;top:0;z-index:200;
  background:#fff;
  border-bottom:1px solid var(--line);
}
header nav{height:68px;display:flex;align-items:center;justify-content:space-between;}
.logo{display:flex;align-items:center;gap:9px;font-size:20px;font-weight:800;text-decoration:none;color:var(--ink);letter-spacing:.2px;}
.logo svg{flex-shrink:0;}
.nav-links{list-style:none;display:flex;gap:34px;}
.nav-links a{
  text-decoration:none;color:var(--ink-soft);font-size:14.5px;font-weight:600;
  padding:6px 2px;border-bottom:2px solid transparent;transition:color .2s,border-color .2s;
}
.nav-links a:hover{color:var(--primary);}
.nav-links a.active{color:var(--primary);border-bottom-color:var(--primary);}
.nav-cta{background:var(--primary);color:#fff!important;padding:9px 20px!important;border-radius:8px;border-bottom:none!important;font-weight:700!important;}
.nav-cta:hover{background:var(--primary-dark)!important;}

/* ---------- 通用 ---------- */
section{padding:88px 0;}
.section-tag{
  display:inline-block;font-size:12.5px;font-weight:700;color:var(--primary);
  background:var(--primary-tint);padding:5px 14px;border-radius:20px;margin-bottom:16px;letter-spacing:.5px;
}
.section-header{max-width:640px;margin:0 auto 56px;text-align:center;}
.section-header h2{font-size:32px;font-weight:800;margin-bottom:14px;letter-spacing:-.3px;}
.section-header p{color:var(--ink-soft);font-size:15.5px;}
.alt{background:var(--bg-alt);}

/* ---------- Hero（居中排版） ---------- */
.hero{padding:96px 0 60px;text-align:center;background:linear-gradient(180deg,#f5f8ff 0%,#fff 100%);}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  background:#fff;border:1px solid var(--line);border-radius:30px;
  padding:7px 16px;font-size:13px;font-weight:600;color:var(--ink-soft);margin-bottom:26px;
}
.hero-eyebrow span{color:var(--primary);font-weight:800;}
.hero h1{font-size:50px;font-weight:800;line-height:1.2;letter-spacing:-1px;max-width:820px;margin:0 auto 22px;}
.hero h1 em{color:var(--primary);font-style:normal;}
.hero>.container>p{max-width:620px;margin:0 auto 36px;color:var(--ink-soft);font-size:17px;}
.hero-buttons{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-bottom:48px;}
.btn-primary{
  display:inline-flex;align-items:center;gap:9px;background:var(--primary);color:#fff;
  padding:15px 32px;border-radius:9px;font-size:15.5px;font-weight:700;border:none;cursor:pointer;
  text-decoration:none;transition:background .2s,transform .2s;
}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-1px);}
.btn-secondary{
  display:inline-flex;align-items:center;gap:8px;background:#fff;color:var(--ink);
  padding:14px 30px;border-radius:9px;font-size:15px;font-weight:700;border:1.5px solid var(--line);
  cursor:pointer;text-decoration:none;transition:border-color .2s,color .2s;
}
.btn-secondary:hover{border-color:var(--primary);color:var(--primary);}
.hero-apps{display:flex;justify-content:center;gap:40px;flex-wrap:wrap;color:var(--ink-soft);}
.hero-apps div{display:flex;flex-direction:column;align-items:center;gap:8px;font-size:12.5px;font-weight:600;}

/* ---------- 快捷统计条 ---------- */
.quickstats{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:#fff;}
.quickstats .container{display:grid;grid-template-columns:repeat(4,1fr);}
.quickstats div{padding:28px 0;text-align:center;border-left:1px solid var(--line);}
.quickstats div:first-child{border-left:none;}
.qs-num{font-size:28px;font-weight:800;color:var(--primary);}
.qs-label{font-size:13px;color:var(--ink-soft);margin-top:4px;}

/* ---------- 特性：编号列表 ---------- */
.feature-list{display:grid;grid-template-columns:1fr 1fr;gap:0;border-top:1px solid var(--line);}
.feature-row{
  display:flex;gap:22px;padding:32px 28px;border-bottom:1px solid var(--line);
}
.feature-row:nth-child(odd){border-right:1px solid var(--line);}
.feature-num{font-size:26px;font-weight:800;color:var(--line);flex-shrink:0;width:44px;}
.feature-icon{
  width:46px;height:46px;border-radius:10px;background:var(--primary-tint);
  display:flex;align-items:center;justify-content:center;flex-shrink:0;
}
.feature-body h3{font-size:17px;font-weight:700;margin-bottom:6px;}
.feature-body p{font-size:14px;color:var(--ink-soft);}

/* ---------- 平台下载：分栏 ---------- */
.platform-strip{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;}
.platform-col{padding:36px 26px;border-left:1px solid var(--line);text-align:center;background:#fff;}
.platform-col:first-child{border-left:none;}
.platform-col svg{margin:0 auto 16px;}
.platform-col h4{font-size:16px;font-weight:700;margin-bottom:6px;}
.platform-col p{font-size:12.5px;color:var(--ink-soft);margin-bottom:18px;min-height:34px;}
.btn-download{
  display:inline-flex;align-items:center;gap:6px;background:var(--ink);color:#fff;
  padding:10px 22px;border-radius:8px;font-size:13.5px;font-weight:700;border:none;cursor:pointer;transition:background .2s;
}
.btn-download:hover{background:var(--primary);}
.platform-req{font-size:11.5px;color:#94a3b8;margin-top:14px;}

/* ---------- 深度介绍：时间线 ---------- */
.timeline{position:relative;max-width:840px;margin:0 auto;padding-left:36px;}
.timeline::before{content:"";position:absolute;left:9px;top:6px;bottom:6px;width:2px;background:var(--line);}
.tl-item{position:relative;padding-bottom:48px;}
.tl-item:last-child{padding-bottom:0;}
.tl-dot{position:absolute;left:-36px;top:2px;width:20px;height:20px;border-radius:50%;background:var(--primary);border:4px solid var(--primary-tint);}
.tl-item h3{font-size:20px;font-weight:800;margin-bottom:10px;}
.tl-item p{color:var(--ink-soft);margin-bottom:8px;}

/* ---------- 对比表 ---------- */
.compare-table{width:100%;border-collapse:collapse;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;}
.compare-table th{background:var(--ink);color:#fff;padding:16px 22px;text-align:left;font-size:14.5px;}
.compare-table td{padding:15px 22px;border-top:1px solid var(--line);font-size:14px;}
.compare-table tr:nth-child(even) td{background:var(--bg-alt);}
.tick{color:var(--accent);font-weight:800;}
.dash{color:#cbd5e1;}

/* ---------- 用户评价：简约卡片 ---------- */
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;}
.review-card{background:#fff;padding:30px;}
.review-stars{color:#f59e0b;letter-spacing:2px;margin-bottom:14px;font-size:15px;}
.review-card p{font-size:14px;color:var(--ink-soft);margin-bottom:18px;min-height:88px;}
.reviewer{display:flex;align-items:center;gap:10px;}
.reviewer-avatar{width:36px;height:36px;border-radius:50%;background:var(--primary-tint);color:var(--primary);display:flex;align-items:center;justify-content:center;font-weight:800;font-size:14px;}
.reviewer-name{font-size:13.5px;font-weight:700;}
.reviewer-role{font-size:12px;color:#94a3b8;}

/* ---------- FAQ 手风琴（details/summary） ---------- */
.faq-list{max-width:820px;margin:0 auto;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item summary{
  list-style:none;cursor:pointer;padding:22px 4px;display:flex;justify-content:space-between;align-items:center;
  font-weight:700;font-size:15.5px;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary .plus{flex-shrink:0;transition:transform .25s;color:var(--primary);}
.faq-item[open] summary .plus{transform:rotate(45deg);}
.faq-item .faq-a{padding:0 4px 22px;color:var(--ink-soft);font-size:14.5px;max-width:700px;}

/* ---------- 步骤卡（下载页安装指南） ---------- */
.steps{max-width:840px;margin:0 auto;}
.step-row{display:flex;gap:24px;padding:26px 0;border-bottom:1px dashed var(--line);}
.step-row:last-child{border-bottom:none;}
.step-num{width:38px;height:38px;border-radius:50%;background:var(--ink);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;flex-shrink:0;font-size:14px;}
.step-body h3{font-size:16.5px;font-weight:700;margin-bottom:6px;}
.step-body p{color:var(--ink-soft);font-size:14px;}

/* ---------- 版本更新日志 ---------- */
.changelog{max-width:780px;margin:0 auto;}
.log-item{display:grid;grid-template-columns:150px 1fr;gap:20px;padding:22px 0;border-top:1px solid var(--line);}
.log-item:first-child{border-top:none;}
.log-ver{font-weight:800;color:var(--primary);font-size:14.5px;}
.log-date{font-size:12px;color:#94a3b8;margin-top:4px;}
.log-badge{display:inline-block;font-size:11px;background:var(--accent);color:#fff;padding:2px 8px;border-radius:10px;margin-left:8px;vertical-align:2px;}
.log-body p{color:var(--ink-soft);font-size:14px;}

/* ---------- 下载页主区 ---------- */
.download-hero{padding:80px 0 56px;text-align:center;background:linear-gradient(180deg,#f5f8ff,#fff);}
.download-panel{
  max-width:640px;margin:34px auto 0;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:30px;text-align:left;
}
.download-panel-top{display:flex;align-items:center;gap:18px;margin-bottom:22px;}
.download-panel-top h3{font-size:19px;font-weight:800;margin-bottom:4px;}
.download-panel-top p{font-size:13.5px;color:var(--ink-soft);}
.btn-block{width:100%;justify-content:center;}
.secure-line{display:flex;align-items:center;gap:6px;justify-content:center;margin-top:16px;font-size:12.5px;color:var(--ink-soft);}

/* ---------- 安全保障 ---------- */
.security-band{background:var(--ink);color:#fff;}
.security-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center;}
.security-grid .num{font-size:26px;font-weight:800;color:#7dd3fc;}
.security-grid .lb{font-size:13px;color:#cbd5e1;margin-top:6px;}

/* ---------- CTA（中文页） ---------- */
.cta-band{background:var(--primary);color:#fff;text-align:center;border-radius:16px;padding:56px 40px;}
.cta-band h2{font-size:28px;font-weight:800;margin-bottom:14px;}
.cta-band p{color:#dbe6fd;margin-bottom:28px;}
.cta-band .btn-primary{background:#fff;color:var(--primary);}
.cta-band .btn-primary:hover{background:#f1f5f9;}

article.copy h2{font-size:24px;font-weight:800;margin:44px 0 14px;}
article.copy h2:first-child{margin-top:0;}
article.copy p{color:var(--ink-soft);margin-bottom:14px;font-size:15px;}
article.copy ul{margin:0 0 14px 20px;color:var(--ink-soft);}
article.copy li{margin-bottom:6px;}

/* ---------- 页脚 ---------- */
footer{background:var(--bg-alt);border-top:1px solid var(--line);padding:36px 0;text-align:center;}
footer p{color:var(--ink-soft);font-size:12.5px;margin-bottom:6px;}

@keyframes spin{from{transform:rotate(0deg);}to{transform:rotate(360deg);}}

@media (max-width:860px){
  .hero h1{font-size:34px;}
  .feature-list{grid-template-columns:1fr;}
  .feature-row:nth-child(odd){border-right:none;}
  .platform-strip{grid-template-columns:repeat(2,1fr);}
  .platform-col:nth-child(2){border-left:1px solid var(--line);}
  .platform-col:nth-child(3){border-left:none;}
  .review-grid{grid-template-columns:1fr;}
  .quickstats .container{grid-template-columns:repeat(2,1fr);}
  .quickstats div:nth-child(3){border-left:none;}
  .security-grid{grid-template-columns:repeat(2,1fr);}
  .log-item{grid-template-columns:1fr;}
  .nav-links{gap:16px;}
  section{padding:56px 0;}
}