/* ==========================================================================
   UU远程 官网样式系统
   纯手写 CSS，无框架无构建
   ========================================================================== */

/* ---------- 1. 设计变量 ---------- */
:root{
  --brand:#5b7cff;
  --brand2:#8a5cff;
  --accent:#00e0b8;
  --dark:#0c1230;
  --dark2:#131a3d;
  --ink:#1c2340;
  --mut:#5d6689;
  --line:#e8ecf7;
  --bg:#f6f8fd;
  --card:#fff;
  --grad:linear-gradient(135deg,#5b7cff,#8a5cff);
  --grad2:linear-gradient(135deg,#00e0b8,#5b7cff);
  --sh:0 10px 30px rgba(28,35,64,.08);
  --sh2:0 18px 50px rgba(91,124,255,.25);
  --r:16px;
  --r-sm:10px;
  --r-lg:24px;
  --maxw:1200px;
  --gap:24px;
  --ease:cubic-bezier(.22,.7,.3,1);
}

/* ---------- 2. 重置与基础 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.7;
  font-size:15px;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;line-height:1.3;font-weight:700;letter-spacing:.2px}
p{margin:0}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:4px}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* ---------- 3. 导航 ---------- */
.nav{
  position:fixed;inset:0 0 auto 0;z-index:100;height:68px;
  background:rgba(255,255,255,.72);backdrop-filter:saturate(180%) blur(14px);
  border-bottom:1px solid transparent;transition:.3s var(--ease);
}
.nav.scrolled{background:#fff;border-bottom-color:var(--line);box-shadow:0 6px 24px rgba(28,35,64,.06)}
.nav-in{display:flex;align-items:center;justify-content:space-between;height:100%}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:17px;color:var(--ink)}
.logo img{width:30px;height:30px;border-radius:8px;object-fit:cover}
.nav-menu{display:flex;align-items:center;gap:4px}
.nav-menu>li{position:relative}
.nav-menu>li>a{
  display:flex;align-items:center;gap:4px;padding:9px 14px;border-radius:8px;
  font-size:14.5px;color:var(--mut);transition:.2s;
}
.nav-menu>li>a:hover,.nav-menu>li.active>a{color:var(--brand);background:rgba(91,124,255,.08)}
.caret{width:0;height:0;border-left:4px solid transparent;border-right:4px solid transparent;border-top:5px solid currentColor;opacity:.6;transition:.2s}
.drop{
  position:absolute;top:100%;left:0;min-width:172px;background:#fff;border:1px solid var(--line);
  border-radius:12px;box-shadow:var(--sh);padding:8px;opacity:0;visibility:hidden;transform:translateY(8px);
  transition:.22s var(--ease);z-index:20;
}
.nav-menu>li:hover>.drop,.nav-menu>li.sub-open>.drop{opacity:1;visibility:visible;transform:translateY(0)}
.drop a{display:block;padding:9px 12px;border-radius:8px;font-size:14px;color:var(--mut)}
.drop a:hover{background:var(--bg);color:var(--brand)}
.nav-right{display:flex;align-items:center;gap:12px}
.burger{display:none;width:38px;height:38px;border-radius:9px;position:relative}
.burger span{position:absolute;left:10px;width:18px;height:2px;background:var(--ink);border-radius:2px;transition:.25s}
.burger span:nth-child(1){top:13px}
.burger span:nth-child(2){top:18px}
.burger span:nth-child(3){top:23px}
.burger.open span:nth-child(1){transform:translateY(5px) rotate(45deg)}
.burger.open span:nth-child(2){opacity:0}
.burger.open span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

/* ---------- 4. 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 22px;border-radius:10px;font-size:14.5px;font-weight:600;
  transition:.25s var(--ease);white-space:nowrap;
}
.btn-grad{background:var(--grad);color:#fff;box-shadow:0 8px 22px rgba(91,124,255,.28)}
.btn-grad:hover{transform:translateY(-2px);box-shadow:0 14px 32px rgba(91,124,255,.36)}
.btn-ghost{border:1.5px solid var(--line);color:var(--ink);background:#fff}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px)}
.btn-lg{padding:14px 30px;font-size:15.5px}
.btn-sm{padding:8px 16px;font-size:13.5px;border-radius:8px}
.btn-block{width:100%}

/* ---------- 5. Hero ---------- */
.hero{padding:112px 0 56px;position:relative;overflow:hidden}
.hero::before{
  content:"";position:absolute;top:-180px;right:-120px;width:620px;height:620px;border-radius:50%;
  background:radial-gradient(circle,rgba(138,92,255,.16),transparent 65%);pointer-events:none;
}
.hero::after{
  content:"";position:absolute;top:-80px;left:-160px;width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle,rgba(0,224,184,.13),transparent 65%);pointer-events:none;
}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.02fr) minmax(0,.98fr);gap:52px;align-items:center;position:relative;z-index:1}
.hero h1{font-size:44px;line-height:1.25;letter-spacing:-.5px}
.hero .hl{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.slogan{margin-top:18px;font-size:16px;color:var(--mut);max-width:520px}
.hero-btns{display:flex;gap:12px;margin-top:28px;flex-wrap:wrap}
.hero-stats{display:flex;gap:38px;margin-top:34px}
.st b{display:block;font-size:27px;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;font-weight:800}
.st span{font-size:13px;color:var(--mut)}
.hero-note{margin-top:22px;font-size:13px;color:var(--mut);opacity:.85}

/* ---------- 6. 首屏演示器 ---------- */
.demo{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh2);
  overflow:hidden;position:relative;
}
.demo-top{display:flex;align-items:center;gap:10px;padding:12px 16px;border-bottom:1px solid var(--line);background:#fbfcff}
.demo-dots{display:flex;gap:6px}
.demo-dots i{width:10px;height:10px;border-radius:50%;background:#e2e7f3}
.demo-dots i:nth-child(1){background:#ff5f57}.demo-dots i:nth-child(2){background:#febc2e}.demo-dots i:nth-child(3){background:#28c840}
.demo-title{font-size:13px;color:var(--mut);font-weight:600}
.demo-body{padding:18px}
.demo-devices{display:grid;gap:8px;margin-bottom:14px}
.demo-device{
  display:flex;align-items:center;gap:11px;padding:10px 12px;border:1.5px solid var(--line);
  border-radius:12px;cursor:pointer;transition:.2s;background:#fff;
}
.demo-device:hover{border-color:#c9d5ff}
.demo-device.sel{border-color:var(--brand);background:rgba(91,124,255,.06);box-shadow:0 4px 14px rgba(91,124,255,.12)}
.demo-device .ic{font-size:20px}
.demo-device .nm{font-size:13.5px;font-weight:600;line-height:1.3}
.demo-device .nm small{display:block;font-weight:400;font-size:11.5px;color:var(--mut)}
.demo-screen{position:relative;border-radius:14px;overflow:hidden;background:linear-gradient(160deg,#eef2fd,#e6ecfa)}
.demo-wall{position:absolute;inset:0;background:
  radial-gradient(420px 240px at 20% 25%,rgba(91,124,255,.16),transparent 60%),
  radial-gradient(360px 220px at 80% 70%,rgba(0,224,184,.16),transparent 60%);}
.demo-os{position:relative;padding:16px;display:flex;flex-direction:column;gap:10px}
.demo-win{background:#fff;border-radius:8px;box-shadow:0 6px 18px rgba(28,35,64,.12);overflow:hidden;max-width:88%}
.winbar{display:flex;align-items:center;gap:5px;padding:7px 10px;border-bottom:1px solid var(--line);background:#fafbff}
.winbar i{width:7px;height:7px;border-radius:50%;background:#dfe4f0}
.winbar b{font-size:11px;color:var(--mut);font-weight:600;margin-left:6px}
.chart{display:flex;align-items:flex-end;gap:6px;height:60px;padding:12px}
.chart i{flex:1;border-radius:3px 3px 0 0;background:var(--grad2);opacity:.85}
.chart i:nth-child(1){height:38%}.chart i:nth-child(2){height:62%}.chart i:nth-child(3){height:46%}
.chart i:nth-child(4){height:84%}.chart i:nth-child(5){height:55%}.chart i:nth-child(6){height:72%}
.chart i:nth-child(7){height:40%}.chart i:nth-child(8){height:92%}
.demo-task{position:relative;display:flex;gap:8px;justify-content:center;margin-top:12px}
.tbtn{width:34px;height:34px;border-radius:9px;background:#fff;box-shadow:0 3px 10px rgba(28,35,64,.12);font-size:15px;transition:.2s}
.tbtn:hover{transform:translateY(-2px)}
.demo-quality{position:relative;display:flex;gap:6px;justify-content:center;margin-top:10px}
.demo-quality button{padding:5px 14px;border-radius:20px;font-size:12px;color:var(--mut);border:1px solid var(--line);background:#fff;transition:.2s}
.demo-quality button.on{background:var(--grad);color:#fff;border-color:transparent}
.demo-hud{position:relative;display:flex;gap:8px;justify-content:center;margin-top:12px;flex-wrap:wrap}
.hud-pill{background:rgba(12,18,48,.72);color:#fff;font-size:11.5px;padding:4px 11px;border-radius:20px;backdrop-filter:blur(4px)}
.hud-pill b{color:var(--accent);font-weight:700}
.demo-lock{
  position:absolute;inset:0;background:rgba(255,255,255,.86);backdrop-filter:blur(3px);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;text-align:center;padding:20px;
  transition:.35s var(--ease);
}
.demo-lock .lk{font-size:30px}
.demo-lock p{font-size:13.5px;color:var(--mut)}
.demo-connect{
  display:inline-flex;align-items:center;gap:8px;padding:11px 26px;border-radius:24px;
  background:var(--grad);color:#fff;font-size:14.5px;font-weight:600;box-shadow:0 8px 20px rgba(91,124,255,.3);
}
.demo-connect .sp{display:none;width:14px;height:14px;border:2px solid rgba(255,255,255,.4);border-top-color:#fff;border-radius:50%;animation:spin .7s linear infinite}
.demo-connect.loading .sp{display:block}
.demo-connect.loading span:not(.sp){display:none}
@keyframes spin{to{transform:rotate(360deg)}}
.demo.linked .demo-lock{opacity:0;visibility:hidden}

/* ---------- 7. 数据条 ---------- */
.stats-strip{margin-top:56px;background:var(--dark);color:#fff;padding:34px 0}
.strip-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;text-align:center}
.strip-grid b{display:block;font-size:30px;background:var(--grad2);-webkit-background-clip:text;background-clip:text;color:transparent;font-weight:800}
.strip-grid span{font-size:13.5px;color:rgba(255,255,255,.72)}

/* ---------- 8. 通用区块 ---------- */
.sec{padding:86px 0}
.sec-head{text-align:center;max-width:760px;margin:0 auto 46px}
.sec-tag{
  display:inline-block;padding:5px 14px;border-radius:20px;background:rgba(91,124,255,.1);
  color:var(--brand);font-size:12.5px;font-weight:700;letter-spacing:.6px;margin-bottom:14px;
}
.sec-title{font-size:32px;letter-spacing:-.4px}
.sec-sub{margin-top:12px;color:var(--mut);font-size:15.5px}

/* ---------- 9. 三步 ---------- */
.step-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--gap)}
.step{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:30px 26px;box-shadow:var(--sh);position:relative;transition:.3s var(--ease)}
.step:hover{transform:translateY(-6px);box-shadow:var(--sh2)}
.step .num{
  width:42px;height:42px;border-radius:12px;background:var(--grad);color:#fff;display:flex;align-items:center;
  justify-content:center;font-weight:800;font-size:19px;margin-bottom:16px;box-shadow:0 8px 18px rgba(91,124,255,.28);
}
.step h3{font-size:18px;margin-bottom:9px}
.step p{color:var(--mut);font-size:14.5px}

/* ---------- 10. 功能卡 ---------- */
.feat-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:var(--gap)}
.feat{
  display:block;background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:26px 24px;
  box-shadow:var(--sh);transition:.3s var(--ease);position:relative;overflow:hidden;
}
.feat::after{content:"";position:absolute;inset:auto auto -40px -40px;width:110px;height:110px;border-radius:50%;background:var(--grad);opacity:0;transition:.35s}
.feat:hover{transform:translateY(-6px);box-shadow:var(--sh2);border-color:#d6deff}
.feat:hover::after{opacity:.07}
.feat .fi{font-size:26px;margin-bottom:13px}
.feat h3{font-size:17px;margin-bottom:8px}
.feat h4{font-size:13px;color:var(--brand);font-weight:600;margin-bottom:8px}
.feat p{color:var(--mut);font-size:14px}
.feat .more{display:inline-flex;align-items:center;gap:5px;margin-top:14px;font-size:13px;color:var(--brand);font-weight:600;position:relative;z-index:1}
.feat .more::after{content:"→";transition:.25s}
.feat:hover .more::after{transform:translateX(4px)}
.feat-ico{
  width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  font-size:22px;background:rgba(91,124,255,.09);margin-bottom:14px;
}

/* ---------- 11. 场景 ---------- */
.scene-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--gap)}
.scene{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:26px 24px;box-shadow:var(--sh);transition:.3s var(--ease)}
.scene:hover{transform:translateY(-6px);box-shadow:var(--sh2)}
.scene .si{font-size:26px;margin-bottom:13px}
.scene h3{font-size:17px;margin-bottom:8px}
.scene p{color:var(--mut);font-size:14px}

/* ---------- 12. 设备 ---------- */
.device-row{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:16px}
.device-chip{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:26px 16px;text-align:center;
  box-shadow:var(--sh);transition:.3s var(--ease);
}
.device-chip:hover{transform:translateY(-5px);box-shadow:var(--sh2)}
.device-chip .di{font-size:30px;display:block;margin-bottom:10px}
.device-chip b{display:block;font-size:15.5px}
.device-chip span{font-size:12.5px;color:var(--mut)}

/* ---------- 13. 价格 ---------- */
.price-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--gap);align-items:start}
.price{background:var(--card);border:1.5px solid var(--line);border-radius:var(--r-lg);padding:32px 28px;box-shadow:var(--sh);position:relative;transition:.3s var(--ease)}
.price:hover{transform:translateY(-5px);box-shadow:var(--sh2)}
.price.hot{border-color:var(--brand);box-shadow:var(--sh2)}
.price .tag{
  position:absolute;top:-13px;left:50%;transform:translateX(-50%);background:var(--grad);color:#fff;
  padding:5px 16px;border-radius:20px;font-size:12.5px;font-weight:700;white-space:nowrap;
}
.price h3{font-size:18px}
.price .p{font-size:38px;font-weight:800;margin:10px 0 4px;letter-spacing:-1px}
.price .p small{font-size:14px;font-weight:500;color:var(--mut)}
.price .pd{color:var(--mut);font-size:14px;margin-bottom:18px}
.price ul{margin-bottom:24px;display:grid;gap:10px}
.price li{font-size:14px;padding-left:24px;position:relative;color:var(--ink)}
.price li::before{content:"✓";position:absolute;left:0;color:var(--accent);font-weight:800}

/* ---------- 14. 竞品对比表 ---------- */
.compare-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r-lg);background:#fff;box-shadow:var(--sh)}
.compare-table{min-width:840px;table-layout:fixed;font-size:14px}
.compare-table th,.compare-table td{padding:15px 12px;text-align:center;border-bottom:1px solid var(--line)}
.compare-table thead th{background:var(--bg);font-weight:700;font-size:14.5px}
.compare-table thead th:first-child{text-align:left;color:var(--mut);font-weight:500}
.compare-table tbody tr:hover{background:#fafbff}
.compare-table td:first-child{text-align:left;font-weight:600;color:var(--ink)}
.compare-table td.own{background:rgba(91,124,255,.05);font-weight:600}
.compare-table .yes{color:var(--accent);font-size:17px;font-weight:800}
.compare-table .no{color:#c3c9db;font-size:17px;font-weight:800}
.compare-table .half{color:#f5a524;font-size:15px;font-weight:800}
.compare-note{margin-top:14px;font-size:12.5px;color:var(--mut)}
.compare-cta{margin-top:26px;display:flex;gap:12px;justify-content:center;flex-wrap:wrap}

/* ---------- 15. FAQ ---------- */
.faq-list{max-width:860px;margin:0 auto;display:grid;gap:12px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;transition:.25s}
.faq-item.open{border-color:#c9d5ff;box-shadow:var(--sh)}
.faq-q{display:flex;align-items:center;gap:12px;padding:19px 22px;cursor:pointer;font-weight:600;font-size:15.5px}
.faq-q:hover{color:var(--brand)}
.qico{
  flex:0 0 auto;width:32px;height:32px;border-radius:50%;background:var(--grad);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:12.5px;font-weight:800;
}
.faq-q .arr{margin-left:auto;transition:.3s var(--ease);color:var(--mut);font-size:14px}
.faq-item.open .faq-q .arr{transform:rotate(180deg);color:var(--brand)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s var(--ease)}
.faq-a-in{padding:0 22px 22px 66px;color:var(--mut);font-size:14.5px}
.faq-a-in ol{list-style:decimal;padding-left:20px;display:grid;gap:9px}
.faq-a-in ol li::marker{color:var(--brand);font-weight:700}

/* ---------- 16. 用户评价 ---------- */
.review-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--gap)}
.review{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:26px 24px;box-shadow:var(--sh);transition:.3s var(--ease)}
.review:hover{transform:translateY(-5px);box-shadow:var(--sh2)}
.review .stars{color:#f5a524;letter-spacing:2px;font-size:15px;margin-bottom:12px}
.review .quote{font-size:14.5px;color:var(--ink);line-height:1.85;min-height:96px}
.review .who{display:flex;align-items:center;gap:12px;margin-top:18px;padding-top:16px;border-top:1px solid var(--line)}
.review .ava{
  width:46px;height:46px;border-radius:50%;background:var(--grad);color:#fff;display:flex;align-items:center;
  justify-content:center;font-weight:700;font-size:17px;flex:0 0 auto;
}
.review .who b{display:block;font-size:14.5px}
.review .who span{font-size:12.5px;color:var(--mut)}

/* ---------- 17. 信任背书 ---------- */
.trust{background:linear-gradient(180deg,#fff,var(--bg))}
.trust-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:var(--gap)}
.trust-item{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:26px 22px;box-shadow:var(--sh);text-align:center;transition:.3s var(--ease)}
.trust-item:hover{transform:translateY(-5px);box-shadow:var(--sh2)}
.trust-item .ti{font-size:28px;margin-bottom:12px}
.trust-item h3{font-size:16px;margin-bottom:8px}
.trust-item p{font-size:13.5px;color:var(--mut)}
.cert-row{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:34px}
.cert{
  display:inline-flex;align-items:center;gap:8px;padding:9px 18px;border-radius:24px;background:#fff;
  border:1px solid var(--line);font-size:13px;color:var(--mut);box-shadow:var(--sh);
}
.cert b{color:var(--ink)}

/* ---------- 18. 开发者工具 ---------- */
.devtools{background:var(--dark);color:#fff}
.devtools .sec-tag{background:rgba(91,124,255,.16);color:#a8bcff}
.devtools .sec-sub{color:rgba(255,255,255,.62)}
.dev-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--gap)}
.dev-card{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);border-radius:var(--r);padding:26px 24px;transition:.3s var(--ease)}
.dev-card:hover{background:rgba(255,255,255,.09);transform:translateY(-5px)}
.dev-card .di{font-size:24px;margin-bottom:12px}
.dev-card h3{font-size:16.5px;margin-bottom:8px}
.dev-card h4{font-size:12.5px;color:var(--accent);font-weight:600;margin-bottom:8px}
.dev-card p{font-size:13.5px;color:rgba(255,255,255,.66)}
.dev-card code{
  display:inline-block;margin-top:12px;padding:6px 12px;border-radius:6px;background:rgba(0,224,184,.12);
  color:var(--accent);font-family:Consolas,Monaco,monospace;font-size:12.5px;
}
.dev-api{margin-top:40px;background:rgba(0,0,0,.28);border:1px solid rgba(255,255,255,.1);border-radius:var(--r);padding:26px 28px}
.dev-api h3{font-size:18px;margin-bottom:6px}
.dev-api>p{font-size:13.5px;color:rgba(255,255,255,.6);margin-bottom:16px}
.api-row{display:grid;grid-template-columns:150px 1fr;gap:10px 18px;font-family:Consolas,Monaco,monospace;font-size:13px}
.api-row .m{color:var(--accent);font-weight:700}
.api-row .d{color:rgba(255,255,255,.72)}

/* ---------- 19. 图文展示 ---------- */
.shots{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--gap)}
.shot{background:#fff;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;box-shadow:var(--sh);transition:.3s var(--ease)}
.shot:hover{transform:translateY(-6px);box-shadow:var(--sh2)}
.shot img{width:100%;height:230px;object-fit:cover;background:var(--bg)}
.shot .meta{padding:18px 20px}
.shot h3{font-size:16px;margin-bottom:6px}
.shot p{font-size:13.5px;color:var(--mut)}

/* ---------- 20. 资讯 ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--gap)}
.ncard{background:#fff;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;box-shadow:var(--sh);display:flex;flex-direction:column;transition:.3s var(--ease)}
.ncard:hover{transform:translateY(-6px);box-shadow:var(--sh2)}
.ncard img{width:100%;height:170px;object-fit:cover}
.ncard .nb{padding:20px;display:flex;flex-direction:column;flex:1}
.ncard .tag{align-self:flex-start;padding:4px 11px;border-radius:20px;background:rgba(91,124,255,.1);color:var(--brand);font-size:12px;font-weight:600;margin-bottom:11px}
.ncard h3{font-size:16.5px;line-height:1.5;margin-bottom:9px}
.ncard h3:hover{color:var(--brand)}
.ncard p{font-size:13.5px;color:var(--mut);flex:1}
.ncard .date{margin-top:14px;font-size:12.5px;color:#9aa2bd}

/* ---------- 21. CTA 区 ---------- */
.cta-band{background:var(--grad);color:#fff;border-radius:var(--r-lg);padding:44px 40px;text-align:center;box-shadow:var(--sh2)}
.cta-band h2{font-size:28px;margin-bottom:10px}
.cta-band p{opacity:.9;font-size:15px}
.cta-band .btn-ghost{background:transparent;border-color:rgba(255,255,255,.6);color:#fff}
.cta-band .btn-ghost:hover{background:#fff;color:var(--brand);border-color:#fff}
.cta-band .btn-white{background:#fff;color:var(--brand)}
.cta-btns{display:flex;gap:12px;justify-content:center;margin-top:24px;flex-wrap:wrap}

/* ---------- 22. 页脚 ---------- */
.footer{background:var(--dark2);color:rgba(255,255,255,.68);padding:64px 0 26px;margin-top:0}
.foot-grid{display:grid;grid-template-columns:minmax(0,1.6fr) repeat(4,minmax(0,1fr));gap:36px}
.foot-brand .logo{color:#fff;margin-bottom:14px}
.foot-brand p{font-size:13.5px;max-width:300px;line-height:1.9}
.foot-col h4{color:#fff;font-size:14.5px;margin-bottom:15px}
.foot-col a{display:block;font-size:13.5px;padding:5px 0;color:rgba(255,255,255,.6)}
.foot-col a:hover{color:var(--accent)}
.foot-bottom{margin-top:44px;padding-top:22px;border-top:1px solid rgba(255,255,255,.1);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:12.5px}

/* ---------- 23. 内页 ---------- */
.page-head{padding:120px 0 44px;background:linear-gradient(180deg,rgba(91,124,255,.07),transparent)}
.crumb{font-size:13px;color:var(--mut);margin-bottom:16px}
.crumb a:hover{color:var(--brand)}
.page-head h1{font-size:36px;letter-spacing:-.6px;line-height:1.3}
.page-head .lead{margin-top:14px;font-size:16px;color:var(--mut);max-width:760px}
.page-head .pbtns{display:flex;gap:12px;margin-top:24px;flex-wrap:wrap}

.article-layout{display:grid;grid-template-columns:250px minmax(0,1fr);gap:44px;align-items:start;padding:44px 0 80px}
.toc{position:sticky;top:92px;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:20px;box-shadow:var(--sh)}
.toc h4{font-size:13px;color:var(--mut);letter-spacing:.6px;margin-bottom:12px;text-transform:uppercase}
.toc-list{display:grid;gap:2px}
.toc-item{display:flex;align-items:flex-start;gap:9px;padding:7px 8px;border-radius:7px;font-size:13.5px;color:var(--mut);transition:.2s}
.toc-item .dot{flex:0 0 auto;width:6px;height:6px;border-radius:50%;background:#ccd3e6;margin-top:8px;transition:.2s}
.toc-item:hover{background:var(--bg);color:var(--brand)}
.toc-item.active{color:var(--brand);font-weight:600;background:rgba(91,124,255,.07)}
.toc-item.active .dot{background:var(--brand);box-shadow:0 0 0 3px rgba(91,124,255,.18)}

.article{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:44px 46px;box-shadow:var(--sh)}
.article h2{font-size:25px;margin:44px 0 16px;padding-top:8px;scroll-margin-top:100px}
.article h2:first-child{margin-top:0}
.article h3{font-size:19px;margin:32px 0 12px}
.article h4{font-size:16px;margin:24px 0 10px;color:var(--ink)}
.article p{margin-bottom:16px;color:#3d4665;font-size:15.5px;line-height:1.95}
.article ul,.article ol{margin:0 0 18px;padding-left:22px;display:grid;gap:9px;color:#3d4665;font-size:15.5px}
.article ul{list-style:disc}
.article ol{list-style:decimal}
.article li::marker{color:var(--brand);font-weight:700}
.article strong{color:var(--ink)}
.article img{border-radius:var(--r);margin:8px 0 22px;box-shadow:var(--sh)}
.article .lead-p{font-size:17px;color:var(--ink);font-weight:500;background:var(--bg);border-left:4px solid var(--brand);padding:16px 20px;border-radius:0 var(--r-sm) var(--r-sm) 0;margin-bottom:26px}
.tipbox{background:rgba(0,224,184,.08);border:1px solid rgba(0,224,184,.3);border-radius:var(--r);padding:18px 22px;margin:22px 0;font-size:14.5px;color:#1a5e55}
.tipbox b{display:block;margin-bottom:6px;color:#0e8f7d}
.tipbox ul{padding-left:20px;margin:0}
.tipbox li::marker{color:#0e8f7d}
.warnbox{background:rgba(245,165,36,.09);border:1px solid rgba(245,165,36,.32);border-radius:var(--r);padding:18px 22px;margin:22px 0;font-size:14.5px;color:#8a5a06}
.warnbox b{display:block;margin-bottom:6px}
.table-wrap{overflow-x:auto;margin:22px 0;border:1px solid var(--line);border-radius:var(--r)}
.article table{font-size:14px;min-width:520px}
.article th,.article td{padding:12px 14px;border-bottom:1px solid var(--line);text-align:left}
.article th{background:var(--bg);font-weight:700}
.related{margin-top:40px;padding-top:28px;border-top:1px solid var(--line)}
.related h3{font-size:18px;margin-bottom:16px}
.related ul{display:grid;gap:10px;padding-left:0}
.related li{position:relative;padding-left:16px;list-style:none;font-size:14.5px;color:var(--mut)}
.related li::before{content:"";position:absolute;left:0;top:11px;width:6px;height:6px;border-radius:50%;background:var(--brand)}
.related a:hover{color:var(--brand)}

/* ---------- 24. 入场动画 ---------- */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ---------- 25. 响应式 ---------- */
@media (max-width:1024px){
  .hero{grid-template-columns:1fr}
  .hero-grid{grid-template-columns:1fr}
  .hero h1{font-size:36px}
  .feat-grid,.trust-grid,.dev-grid,.shots,.news-grid{grid-template-columns:repeat(2,1fr)}
  .scene-grid,.step-grid,.review-grid,.price-grid{grid-template-columns:repeat(2,1fr)}
  .device-row{grid-template-columns:repeat(3,1fr)}
  .article-layout{grid-template-columns:minmax(0,1fr)}
  .toc{position:static}
  .foot-grid{grid-template-columns:1fr 1fr 1fr}
}
@media (max-width:992px){
  .nav-menu{
    position:fixed;top:68px;right:0;bottom:0;width:280px;background:#fff;flex-direction:column;
    align-items:stretch;padding:16px;gap:2px;box-shadow:var(--sh);transform:translateX(100%);transition:.3s var(--ease);
  }
  .nav-menu.open{transform:none}
  .nav-menu>li>a{padding:12px 14px;justify-content:space-between}
  .drop{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;border:none;padding:0 0 6px 14px;display:none}
  .nav-menu>li.sub-open>.drop{display:block}
  .burger{display:block}
  .nav-menu>li:hover>.drop{opacity:1}
  .strip-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:640px){
  .sec{padding:58px 0}
  .hero{padding:96px 0 40px}
  .hero h1{font-size:29px}
  .sec-title{font-size:25px}
  .hero-stats{gap:22px}
  .st b{font-size:22px}
  .feat-grid,.scene-grid,.step-grid,.review-grid,.price-grid,.dev-grid,.shots,.news-grid,.trust-grid,.device-row{grid-template-columns:1fr}
  .article{padding:28px 22px}
  .article h2{font-size:22px}
  .article h3{font-size:17.5px}
  .foot-grid{grid-template-columns:1fr 1fr}
  .foot-brand{grid-column:1/-1}
  .cta-band{padding:32px 22px}
  .cta-band h2{font-size:23px}
  .strip-grid b{font-size:24px}
}