/* ==========================================================================
   NanoCloud 入口页共享样式
   取色来自服务本体：主色 #0665d0，标题渐变 linear-gradient(135deg,#946dff,#ff72a2)
   （原站 .index-title 为 146deg，这里改用 135deg 更贴合现代屏），字体 MiSans。
   ========================================================================== */

:root{
  --brand:#0665d0;        --brand-hover:#117ef8;   --brand-soft:#eef5ff;
  --violet:#946dff;       --pink:#ff72a2;
  --grad:linear-gradient(135deg,#946dff 0%,#ff72a2 100%);
  --grad-soft:linear-gradient(135deg,rgba(148,109,255,.12),rgba(255,114,162,.12));

  --ink:#16181f;          --ink-2:#545c6b;         --ink-3:#868e9c;    --ink-4:#aab1bd;
  --line:#e8eaf0;         --line-2:#f1f3f7;

  --bg:#ffffff;           --bg-soft:#f7f8fb;       --bg-tint:#fbfbfd;
  --ok:#00c29a;           --warn:#ff9f00;

  --r:16px;               --r-sm:10px;             --r-xs:8px;         --pill:999px;
  --shadow-sm:0 1px 2px rgba(16,24,40,.04), 0 1px 3px rgba(16,24,40,.05);
  --shadow:0 4px 16px -4px rgba(16,24,40,.08), 0 2px 6px -2px rgba(16,24,40,.05);
  --shadow-lg:0 24px 48px -20px rgba(16,24,40,.22), 0 8px 20px -12px rgba(16,24,40,.12);
  --shadow-brand:0 10px 24px -10px rgba(6,101,208,.55);

  --maxw:1120px;          --hdr:64px;
  --font:"MiSans",-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:calc(var(--hdr) + 16px)}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font:400 16px/1.75 var(--font);
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  -webkit-tap-highlight-color:transparent;
}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.3;letter-spacing:-.015em}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
a{color:inherit;text-decoration:none}
img,svg{display:block;max-width:100%}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:4px}

.wrap{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 20px}
.sr{position:absolute;width:1px;height:1px;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:-9999px;top:0;z-index:99;background:var(--brand);color:#fff;padding:10px 18px}
.skip:focus{left:0}
.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:transparent}

/* ---------- 顶栏 ---------- */
.hdr{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.86);
  -webkit-backdrop-filter:saturate(180%) blur(12px);backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid var(--line-2);
}
.hdr-in{display:flex;align-items:center;gap:20px;height:var(--hdr)}
.logo{
  display:flex;align-items:center;gap:9px;flex:0 0 auto;
  font-size:18px;font-weight:700;letter-spacing:-.01em;
}
.logo-i{
  width:30px;height:30px;border-radius:9px;background:var(--grad);
  display:grid;place-items:center;color:#fff;font-weight:700;font-size:16px;
  box-shadow:0 4px 10px -3px rgba(148,109,255,.7);
}
.nav{display:flex;gap:2px;margin-left:auto}
.nav a{
  padding:8px 14px;border-radius:var(--pill);font-size:15px;color:var(--ink-2);
  transition:background .18s,color .18s;
}
.nav a:hover{background:var(--bg-soft);color:var(--ink)}
.nav a[aria-current="page"]{background:var(--brand-soft);color:var(--brand);font-weight:600}
.hdr .btn{margin-left:8px}
@media (max-width:900px){
  .nav{display:none}
  .hdr-in{gap:10px}
  .hdr .btn{margin-left:auto}
}

/* 手机端二级导航（横向滚动） */
.subnav{
  display:none;gap:6px;overflow-x:auto;scrollbar-width:none;
  padding:0 20px 10px;margin:0 -20px;
}
.subnav::-webkit-scrollbar{display:none}
.subnav a{
  flex:0 0 auto;padding:6px 14px;border:1px solid var(--line);border-radius:var(--pill);
  font-size:14px;color:var(--ink-2);background:#fff;white-space:nowrap;
}
.subnav a[aria-current="page"]{border-color:var(--brand);color:var(--brand);font-weight:600;background:var(--brand-soft)}
@media (max-width:900px){.subnav{display:flex}}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font:600 15px/1.5 var(--font);white-space:nowrap;
  padding:12px 22px;border:0;border-radius:var(--r-sm);cursor:pointer;
  transition:background-color .18s,box-shadow .18s,transform .14s,border-color .18s;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:var(--shadow-brand)}
.btn-primary:hover{background:var(--brand-hover);transform:translateY(-2px);box-shadow:0 14px 28px -10px rgba(6,101,208,.6)}
.btn-ghost{background:#fff;color:var(--ink);box-shadow:inset 0 0 0 1px var(--line)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);box-shadow:inset 0 0 0 1px var(--brand)}
.btn-grad{background:var(--grad);color:#fff;box-shadow:0 10px 24px -10px rgba(148,109,255,.75)}
.btn-grad:hover{transform:translateY(-2px);box-shadow:0 16px 30px -12px rgba(148,109,255,.85)}
.btn-white{background:#fff;color:var(--brand)}
.btn-white:hover{transform:translateY(-2px);box-shadow:0 14px 28px -12px rgba(0,0,0,.35)}
.btn-lg{padding:15px 30px;font-size:16px;border-radius:12px}
.btn-sm{padding:8px 16px;font-size:14px}
.btn-block{width:100%}

/* ---------- 版式 ---------- */
section{padding:76px 0}
@media (max-width:720px){section{padding:50px 0}}
.sec-soft{background:var(--bg-soft);border-top:1px solid var(--line-2);border-bottom:1px solid var(--line-2)}
.head{max-width:640px;margin-bottom:38px}
.head.center{margin-left:auto;margin-right:auto;text-align:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:7px;margin-bottom:14px;
  font-size:13px;font-weight:600;letter-spacing:.02em;color:var(--brand);
  background:var(--brand-soft);border-radius:var(--pill);padding:5px 13px;
}
.head h2{font-size:clamp(24px,3.4vw,33px)}
.head p{margin-top:12px;color:var(--ink-2);font-size:16.5px}

/* 面包屑 */
.crumb{padding:18px 0 0;font-size:13.5px;color:var(--ink-3)}
.crumb a:hover{color:var(--brand)}
.crumb span{margin:0 7px;color:var(--ink-4)}

/* ---------- 首屏 ---------- */
.hero{
  position:relative;overflow:hidden;
  padding:74px 0 66px;
  background:
    radial-gradient(820px 420px at 8% -10%,rgba(148,109,255,.16),transparent 62%),
    radial-gradient(720px 380px at 96% 2%,rgba(255,114,162,.14),transparent 60%),
    var(--bg);
}
.hero-grid{display:grid;grid-template-columns:1.06fr .94fr;gap:52px;align-items:center}
@media (max-width:980px){.hero{padding:48px 0 44px}.hero-grid{grid-template-columns:1fr;gap:34px}}
.hero h1{font-size:clamp(30px,5.2vw,50px);line-height:1.22}
.hero-sub{margin-top:16px;font-size:17px;font-weight:500;color:var(--ink-2)}
.hero .lead{margin-top:12px;font-size:16.5px;color:var(--ink-2);max-width:36em}
.hero .act{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}
.hero .hint{margin-top:14px;font-size:13.5px;color:var(--ink-3)}
.tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:24px}
.tags li{
  font-size:13.5px;color:var(--ink-2);background:#fff;
  border:1px solid var(--line);border-radius:var(--pill);padding:5px 14px;
}

/* 控制台示意卡 */
.mock{
  background:#fff;border:1px solid var(--line);border-radius:var(--r);
  box-shadow:var(--shadow-lg);overflow:hidden;
}
.mock-bar{
  display:flex;align-items:center;gap:6px;padding:13px 16px;
  background:var(--bg-soft);border-bottom:1px solid var(--line);
}
.mock-bar i{width:9px;height:9px;border-radius:50%;background:#dfe3ea}
.mock-bar i:nth-child(1){background:#ffc2d1}
.mock-bar i:nth-child(2){background:#ffe2b0}
.mock-bar i:nth-child(3){background:#b8f0cf}
.mock-bar span{margin-left:auto;font-size:12.5px;color:var(--ink-3)}
.mock-body{padding:20px}
.mock-lead{display:flex;align-items:baseline;justify-content:space-between;font-size:14px;color:var(--ink-2)}
.mock-lead b{font-size:22px;color:var(--ink);letter-spacing:-.02em}
.mock-bar-line{height:8px;border-radius:var(--pill);background:var(--line-2);overflow:hidden;margin:11px 0 18px}
.mock-bar-line i{display:block;height:100%;width:28%;border-radius:var(--pill);background:var(--grad)}
.mock-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.mock-grid div{background:var(--bg-soft);border-radius:var(--r-sm);padding:11px 12px}
.mock-grid span{display:block;font-size:12.5px;color:var(--ink-3)}
.mock-grid b{font-size:14.5px;font-weight:600}
.mock-row{
  display:flex;align-items:center;justify-content:space-between;
  padding:12px 0;border-top:1px solid var(--line-2);font-size:14px;color:var(--ink-2);
}
.mock-row b{font-weight:600;color:var(--ink)}
.mock-cap{margin-top:12px;font-size:12.5px;color:var(--ink-4);text-align:center}

/* 数字条 */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.stats div{background:#fff;padding:20px 18px;text-align:center}
.stats b{display:block;font-size:24px;letter-spacing:-.02em}
.stats span{font-size:13.5px;color:var(--ink-3)}
@media (max-width:640px){.stats{grid-template-columns:1fr 1fr}}

/* ---------- 套餐 ---------- */
.plans{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;align-items:start}
@media (max-width:940px){.plans{grid-template-columns:1fr;max-width:460px;margin:0 auto}}
.plan{
  position:relative;background:#fff;border:1px solid var(--line);
  border-radius:var(--r);padding:26px 24px;box-shadow:var(--shadow-sm);
  transition:transform .2s,box-shadow .2s,border-color .2s;
}
.plan:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:#d6dbe6}
.plan.rec{border-color:transparent;box-shadow:0 20px 44px -18px rgba(148,109,255,.4),0 6px 16px -8px rgba(16,24,40,.1)}
.plan.rec::before{
  content:"";position:absolute;inset:0;border-radius:var(--r);padding:1.5px;
  background:var(--grad);-webkit-mask:linear-gradient(#fff 0 0) content-box,linear-gradient(#fff 0 0);
  -webkit-mask-composite:xor;mask:linear-gradient(#fff 0 0) content-box,linear-gradient(#fff 0 0);mask-composite:exclude;
  pointer-events:none;
}
.plan-tag{
  position:absolute;top:-11px;left:24px;font-size:12px;font-weight:700;letter-spacing:.04em;
  background:var(--grad);color:#fff;padding:4px 12px;border-radius:var(--pill);
  box-shadow:0 6px 14px -6px rgba(148,109,255,.8);
}
.plan h3{font-size:20px}
.plan-sub{margin-top:4px;font-size:13.5px;color:var(--ink-3)}
.price{display:flex;align-items:baseline;gap:3px;margin:18px 0 20px}
.price span{font-size:19px;font-weight:600;color:var(--ink-2)}
.price b{font-size:42px;font-weight:700;letter-spacing:-.03em;line-height:1}
.price i{font-style:normal;font-size:14.5px;color:var(--ink-3)}
.spec{border-top:1px solid var(--line-2);border-bottom:1px solid var(--line-2);padding:14px 0;display:grid;gap:9px}
.spec li{display:flex;align-items:center;justify-content:space-between;font-size:14.5px}
.spec span{color:var(--ink-3)}
.spec b{font-weight:600}
.feats{margin:16px 0 22px;display:grid;gap:10px}
.feats li{display:flex;gap:9px;font-size:14.5px;color:var(--ink-2);line-height:1.6}
.feats li svg{flex:0 0 auto;margin-top:5px;color:var(--ok)}
.feats li.off{color:var(--ink-4)}
.feats li.off svg{color:var(--ink-4)}
.plan .btn{margin-top:auto}

/* ---------- 功能格 ---------- */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
@media (max-width:920px){.cards{grid-template-columns:1fr 1fr;gap:14px}}
@media (max-width:560px){.cards{grid-template-columns:1fr}}
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r);
  padding:24px;box-shadow:var(--shadow-sm);transition:transform .2s,box-shadow .2s;
}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.card-ico{
  width:42px;height:42px;border-radius:12px;display:grid;place-items:center;margin-bottom:16px;
  background:var(--brand-soft);color:var(--brand);
}
.card h3{font-size:17px;margin-bottom:8px}
.card p{font-size:14.5px;color:var(--ink-2)}

/* ---------- 平台 ---------- */
.plats{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
@media (max-width:780px){.plats{grid-template-columns:1fr}}
.plat{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:22px;box-shadow:var(--shadow-sm)}
.plat-top{display:flex;align-items:center;gap:11px}
.plat-ico{width:38px;height:38px;border-radius:10px;display:grid;place-items:center;background:var(--bg-soft);color:var(--ink-2)}
.plat h3{font-size:16.5px}
.plat p{margin-top:10px;font-size:14px;color:var(--ink-3)}
.note{margin-top:18px;font-size:14px;color:var(--ink-3)}

/* ---------- 步骤 ---------- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;counter-reset:s}
@media (max-width:780px){.steps{grid-template-columns:1fr}}
.step{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:24px;box-shadow:var(--shadow-sm)}
.step::before{
  counter-increment:s;content:counter(s);
  display:grid;place-items:center;width:28px;height:28px;margin-bottom:14px;
  background:var(--grad);color:#fff;border-radius:9px;font-size:14px;font-weight:700;
}
.step h3{font-size:17px;margin-bottom:8px}
.step p{font-size:14.5px;color:var(--ink-2)}

/* ---------- 表格 ---------- */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r);background:#fff;box-shadow:var(--shadow-sm)}
table{width:100%;min-width:640px;border-collapse:collapse;font-size:14.5px}
th,td{padding:14px 18px;text-align:left;border-bottom:1px solid var(--line-2)}
thead th{background:var(--bg-soft);font-weight:600;font-size:14px;white-space:nowrap}
tbody tr:last-child td{border-bottom:0}
tbody th{font-weight:500;color:var(--ink-2);width:180px}
td b{font-weight:600}
.col-rec{background:rgba(148,109,255,.045)}
/* 窄屏：对比项那一列吸在左边，横向滑动时标题不跟着跑 */
@media (max-width:900px){
  table{min-width:560px}
  th,td{padding:12px}
  thead th:first-child,tbody th{
    position:sticky;left:0;z-index:2;background:#fff;
    box-shadow:1px 0 0 var(--line-2);
  }
  thead th:first-child{background:var(--bg-soft);z-index:3}
  tbody th{width:104px;font-size:13.5px}
  td .btn{padding:7px 12px;font-size:13px}
}
.tick{color:var(--ok);font-weight:700}
.dash{color:var(--ink-4)}

/* ---------- FAQ ---------- */
.faq{display:grid;gap:12px;max-width:820px;margin:0 auto}
details{background:#fff;border:1px solid var(--line);border-radius:var(--r-sm);box-shadow:var(--shadow-sm)}
details[open]{border-color:#d5e4f8}
summary{
  padding:17px 20px;font-size:15.5px;font-weight:600;cursor:pointer;list-style:none;
  display:flex;align-items:center;gap:14px;
}
summary::-webkit-details-marker{display:none}
summary::after{
  content:"";margin-left:auto;width:8px;height:8px;flex:0 0 auto;
  border-right:2px solid var(--ink-3);border-bottom:2px solid var(--ink-3);
  transform:rotate(45deg);transition:transform .22s;
}
details[open] summary::after{transform:rotate(-135deg);border-color:var(--brand)}
details .body{padding:0 20px 18px;color:var(--ink-2);font-size:15px}
details .body p+p{margin-top:10px}
details .body ul{margin-top:10px;display:grid;gap:7px}
details .body li{padding-left:16px;position:relative}
details .body li::before{content:"";position:absolute;left:3px;top:.72em;width:5px;height:5px;border-radius:50%;background:var(--violet)}

/* ---------- 收口条 ---------- */
.band{
  position:relative;overflow:hidden;border-radius:22px;
  background:var(--grad);color:#fff;padding:52px 40px;text-align:center;
  box-shadow:0 28px 56px -24px rgba(148,109,255,.7);
}
.band::after{content:"";position:absolute;inset:0;background:radial-gradient(520px 220px at 50% -10%,rgba(255,255,255,.28),transparent 70%);pointer-events:none}
.band h2{font-size:clamp(22px,3.2vw,30px)}
.band p{margin-top:12px;font-size:16px;color:rgba(255,255,255,.9)}
.band .act{display:flex;flex-wrap:wrap;justify-content:center;gap:12px;margin-top:26px}
@media (max-width:640px){.band{padding:36px 22px;border-radius:18px}}

/* ---------- 页脚 ---------- */
footer{background:var(--bg-soft);border-top:1px solid var(--line);padding:48px 0 26px;margin-top:0}
.fgrid{display:grid;grid-template-columns:1.8fr 1fr 1fr;gap:30px}
@media (max-width:820px){.fgrid{grid-template-columns:1fr 1fr;gap:24px}}
@media (max-width:380px){.fgrid{grid-template-columns:1fr}}
.fcol h3{font-size:14px;font-weight:600;color:var(--ink);margin-bottom:12px}
.fcol li a{display:block;padding:5px 0;font-size:14px;color:var(--ink-2)}
.fcol li a:hover{color:var(--brand)}
.fcol p{font-size:14px;color:var(--ink-2);max-width:30em}
.fbot{
  margin-top:32px;padding-top:20px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13px;color:var(--ink-3);
}
.fbot a:hover{color:var(--brand)}

/* ---------- 手机底部常驻 ---------- */
.mbar{display:none}
@media (max-width:900px){
  .mbar{
    display:flex;gap:10px;position:fixed;left:0;right:0;bottom:0;z-index:70;
    padding:8px 14px calc(8px + env(safe-area-inset-bottom));
    background:rgba(255,255,255,.94);
    -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
    border-top:1px solid var(--line);
  }
  .mbar .btn{flex:1;padding:13px 14px}
  body{padding-bottom:80px}
}