/* ===== 七亿批量远程管理工具 官网样式 ===== */
:root{
  --blue:#1e6fd9;
  --blue-dark:#144f9e;
  --navy:#0e2546;
  --navy-2:#123059;
  --ink:#26313f;
  --muted:#66788c;
  --line:#e3e9f1;
  --bg:#f5f8fc;
  --card:#ffffff;
  --green:#18a058;
  --radius:12px;
  --shadow:0 2px 10px rgba(14,37,70,.07);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:"Microsoft YaHei","PingFang SC","Hiragino Sans GB",-apple-system,"Segoe UI",sans-serif;color:var(--ink);background:#fff;line-height:1.7;font-size:16px}
img{max-width:100%}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:1100px;margin:0 auto;padding:0 20px}

/* ===== 顶栏 ===== */
.site-header{position:sticky;top:0;z-index:50;background:#fff;border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:62px}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink)}
.brand:hover{text-decoration:none}
.brand-ico{flex-shrink:0;border-radius:10px}
.brand-mark{background:linear-gradient(135deg,#1e6fd9,#0e2546);color:#fff;font-weight:700;font-size:15px;padding:5px 9px;border-radius:8px;letter-spacing:1px}
.brand-text{font-weight:700;font-size:17px;display:flex;flex-direction:column;line-height:1.15}
.brand-text small{font-weight:400;font-size:11px;color:var(--muted);letter-spacing:.5px}
.main-nav{display:flex;gap:26px}
.main-nav a{color:var(--ink);font-size:15px}
.main-nav a:hover{color:var(--blue);text-decoration:none}

/* ===== Hero ===== */
.hero{background:linear-gradient(160deg,var(--navy) 0%,var(--navy-2) 60%,#17407a 100%);color:#fff;padding:64px 0 60px}
.hero-inner{display:flex;align-items:center;gap:44px}
.hero-copy{flex:1.15}
.hero h1{font-size:36px;font-weight:800;line-height:1.3;display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.tag-free{background:linear-gradient(135deg,#22b36b,#18a058);font-size:14px;font-weight:600;padding:3px 12px;border-radius:99px;vertical-align:middle}
.hero-lead{margin:16px 0 24px;font-size:17px;color:#d6e2f4;line-height:1.9}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-block;padding:11px 26px;border-radius:9px;font-size:16px;font-weight:600;transition:all .15s;border:2px solid transparent;cursor:pointer}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn-primary{background:var(--blue);color:#fff}
.btn-primary:hover{background:var(--blue-dark);color:#fff}
.btn-ghost{border-color:#5d7ba8;color:#e7eef9}
.btn-ghost:hover{background:rgba(255,255,255,.08);color:#fff}
/* 深色 hero 用 ghost;浅色背景(下载区等)用 outline */
.btn-outline{background:#fff;border-color:var(--blue);color:var(--blue)}
.btn-outline:hover{background:#eff5ff;color:var(--blue-dark)}

/* bugfix: 让 changelog 列表下的链接/按钮跟 820px 列表同宽左对齐 */
.center-820{max-width:820px;margin:0 auto;text-align:left}
.changelog-more{max-width:820px;margin:16px auto 0;text-align:left}
.btn-lg{padding:13px 34px;font-size:17px}
.hero-meta{margin-top:18px;font-size:13px;color:#9fb3d0}
.hero-shot{flex:1;min-width:280px}
/* 轮播 */
.hero-slider{position:relative;background:rgba(255,255,255,.06);border:1px solid #4a6a99;border-radius:var(--radius);overflow:hidden;height:320px}
.slide-list{display:flex;height:100%;transition:transform .45s ease}
.slide{flex:0 0 100%;height:100%;display:flex;align-items:center;justify-content:center;position:relative}
.slide-ph{position:absolute;color:#9fb3d0;font-size:15px;z-index:1}
.slide img{width:100%;height:100%;object-fit:contain;position:relative;z-index:2;background:#0c2038}
.slide-btn{position:absolute;top:50%;transform:translateY(-50%);width:34px;height:34px;border:none;border-radius:50%;background:rgba(0,0,0,.35);color:#fff;font-size:20px;line-height:1;cursor:pointer;z-index:3}
.slide-btn:hover{background:rgba(0,0,0,.55)}
.slide-prev{left:8px}
.slide-next{right:8px}
.slide-dots{position:absolute;left:0;right:0;bottom:10px;display:flex;justify-content:center;gap:7px;z-index:3}
.slide-dots span{width:8px;height:8px;border-radius:50%;background:rgba(255,255,255,.45);cursor:pointer}
.slide-dots span.on{background:#fff;transform:scale(1.25)}
@media (max-width:820px){.hero-slider{height:230px}}

/* ===== 亮点条 ===== */
.strip{background:#fff;border-bottom:1px solid var(--line)}
.strip-inner{display:flex;justify-content:space-between;gap:16px;padding:18px 20px;flex-wrap:wrap}
.strip-item{color:var(--muted);font-size:14px}
.strip-item strong{color:var(--blue);margin-right:5px}

/* ===== 区块 ===== */
.section{padding:56px 0}
.section-alt{background:var(--bg)}
.section h2{font-size:27px;text-align:center;color:var(--navy)}
.section-sub{text-align:center;color:var(--muted);margin:8px 0 34px;font-size:15px}

/* ===== 卡片 ===== */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:18px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);transition:transform .15s}
.card:hover{transform:translateY(-3px)}
.card-soon{background:transparent;border-style:dashed;box-shadow:none;color:var(--muted)}
.card-soon:hover{transform:none}
.card-soon .card-ico{opacity:.6}
.card-soon h3{color:var(--muted)}
.card-ico{font-size:30px;line-height:1}
.card h3{font-size:17px;color:var(--navy);margin:12px 0 8px}
.card p{font-size:14.5px;color:var(--muted)}
.cards-scene .card h3{font-size:17px}

/* ===== 下载区 ===== */
.dl-box{background:linear-gradient(135deg,#f2f7ff,#eaf1fb);border:1px solid #d6e4f7;border-radius:var(--radius);padding:30px;max-width:760px;margin:0 auto}
.dl-ver{display:flex;align-items:baseline;gap:14px;margin-bottom:12px}
.ver-no{font-size:34px;font-weight:800;color:var(--blue)}
.ver-date{color:var(--muted);font-size:14px}
.dl-req{list-style:none;margin:0 0 18px;font-size:14.5px;color:var(--ink)}
.dl-req li{padding:3px 0;padding-left:20px;position:relative}
.dl-req li::before{content:"✓";position:absolute;left:0;color:var(--green);font-weight:700}
.dl-actions{display:flex;gap:12px;flex-wrap:wrap}
.dl-tip{margin-top:14px;font-size:13px;color:var(--muted)}

/* ===== 更新日志列表 ===== */
.changelog-list{list-style:none;max-width:820px;margin:0 auto}
.changelog-list li{background:#fff;border:1px solid var(--line);border-radius:10px;padding:14px 18px;margin-bottom:10px;font-size:14.5px;color:var(--ink)}
.cl-date{display:inline-block;background:var(--navy);color:#fff;font-size:12px;font-weight:600;border-radius:6px;padding:2px 10px;margin-right:10px}
.link-more{display:inline-block;margin-top:14px}

/* ===== 页头(内页) ===== */
.page-head{background:linear-gradient(150deg,var(--navy),var(--navy-2));color:#fff;padding:44px 0;text-align:center}
.page-head h1{font-size:28px}
.page-head p{margin-top:8px;color:#b9c9e0;font-size:15px}

/* ===== 日志条目页 ===== */
.log-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px 26px;margin-bottom:16px;max-width:820px;margin-left:auto;margin-right:auto}
.log-item h2{font-size:21px;text-align:left;color:var(--navy);margin-bottom:10px}
.log-date{font-size:13px;font-weight:400;color:var(--muted);margin-left:8px}
.log-item ul{padding-left:20px;color:var(--ink);font-size:15px}
.log-item li{padding:3px 0}
.h2-sm{text-align:left;font-size:21px;color:var(--navy);max-width:820px;margin:36px auto 14px}
.steps{max-width:820px;margin:0 auto 20px;padding-left:22px;font-size:15px}
.steps li{padding:4px 0}
.steps strong{color:var(--navy)}

/* ===== 页脚 ===== */
.site-footer{background:linear-gradient(160deg,var(--navy) 0%,#0c2038 100%);color:#b9c9e0;padding:40px 0 0;margin-top:20px}
.footer-inner{display:flex;justify-content:space-between;align-items:flex-start;gap:32px;flex-wrap:wrap;padding-bottom:26px}
.footer-brand{max-width:420px}
.footer-brand-name{display:flex;align-items:center;gap:10px}
.footer-brand-name .brand-mark{font-size:14px}
.footer-brand-name strong{color:#fff;font-size:17px}
.footer-brand p{margin-top:10px;font-size:13.5px;color:#93a7c2;line-height:1.8}
.footer-links{display:flex;flex-wrap:wrap;gap:10px;max-width:560px;justify-content:flex-end}
.footer-links a{color:#c8d6e8;font-size:14px;padding:8px 16px;border:1px solid rgba(255,255,255,.16);border-radius:8px;transition:all .15s}
.footer-links a:hover{color:#fff;border-color:rgba(255,255,255,.4);background:rgba(255,255,255,.06);text-decoration:none}
.footer-copy{border-top:1px solid rgba(255,255,255,.1);padding:16px 20px;font-size:12.5px;color:#7e93b2;text-align:center}

/* 回到顶部按钮 */
.back-top{position:fixed;right:20px;bottom:24px;width:44px;height:44px;border-radius:10px;background:var(--blue);color:#fff;display:flex;align-items:center;justify-content:center;font-size:20px;box-shadow:0 4px 12px rgba(14,37,70,.28);z-index:60;opacity:.85}
.back-top:hover{opacity:1;transform:translateY(-2px);color:#fff;text-decoration:none}

/* ===== 响应式 ===== */
@media (max-width:820px){
  .hero-inner{flex-direction:column}
  .hero h1{font-size:28px}
  .main-nav{gap:14px;font-size:14px}
  .strip-inner{justify-content:flex-start}
  .cards{grid-template-columns:1fr}
}