/* MediaOx 官网:与客户端同一套设计语言(中性灰白底 + 单一强调色 pine) */
:root{
  --paper:#F7F7F5; --panel:#FFFFFF; --rail:#F1F1EE;
  --ink:#18181B; --muted:#5F5F68; --faint:#9A9AA3;
  --pine:#176B4D; --pine-deep:#11553D; --pine-tint:#EBF4EF;
  --line:#E6E6E3; --line-strong:#D6D6D2;
  --r:12px; --r-s:8px;
  --f:-apple-system,"Segoe UI","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --mono:"Cascadia Code",Consolas,"JetBrains Mono",monospace;
  --w:1080px;
}
*{box-sizing:border-box;margin:0;padding:0}
[hidden]{display:none!important}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{font-family:var(--f);font-size:16px;line-height:1.7;color:var(--ink);background:var(--paper)}
a{color:var(--pine);text-decoration:none}
a:hover{text-decoration:underline}
:focus-visible{outline:2px solid var(--pine);outline-offset:2px;border-radius:4px}
::selection{background:var(--pine-tint)}
img,svg{max-width:100%}
.wrap{max-width:var(--w);margin:0 auto;padding:0 16px}
@media (min-width:720px){.wrap{padding:0 28px}}

/* ---- 顶栏 ---- */
.top{position:sticky;top:0;z-index:20;background:rgba(247,247,245,.92);backdrop-filter:saturate(1.4) blur(8px);border-bottom:1px solid var(--line)}
.top .wrap{display:flex;align-items:center;height:60px;gap:20px}
.brand{display:flex;align-items:center;gap:9px;color:var(--ink);font-weight:650;font-size:16px}
.brand:hover{text-decoration:none}
.seal{width:28px;height:28px;border-radius:6px;background:#1A1714;color:#F5F1E8;display:inline-flex;flex-shrink:0}
.nav{display:flex;gap:4px;margin-left:auto;align-items:center}
.nav a{color:var(--muted);font-size:14.5px;padding:6px 10px;border-radius:var(--r-s)}
.nav a:hover{color:var(--ink);background:var(--rail);text-decoration:none}
.nav a[aria-current=page]{color:var(--pine);font-weight:600}
.nav .btn{margin-left:6px}
.nav a.btn-primary,.nav a.btn-primary:hover{color:#fff;background:var(--pine)}
.nav a.btn-primary:hover{background:var(--pine-deep)}
@media (max-width:640px){.nav a:not(.btn){display:none}.nav a.keep{display:inline-block}}

/* ---- 按钮 ---- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font:inherit;font-size:15px;font-weight:600;border-radius:var(--r-s);padding:10px 18px;border:1px solid transparent;cursor:pointer;line-height:1.3;white-space:nowrap}
.btn:hover{text-decoration:none}
.btn-primary{background:var(--pine);color:#fff}
.btn-primary:hover{background:var(--pine-deep)}
.btn-ghost{background:var(--panel);color:var(--ink);border-color:var(--line-strong)}
.btn-ghost:hover{border-color:var(--pine);color:var(--pine)}
.btn-sm{font-size:14px;padding:7px 14px}
.btn-lg{font-size:16px;padding:13px 24px}
.btn[disabled]{opacity:.55;cursor:not-allowed}
.btn svg{width:16px;height:16px}

/* ---- 版块 ---- */
section{padding:72px 0}
section+section{border-top:1px solid var(--line)}
.eyebrow{font-size:13px;font-weight:600;color:var(--pine);letter-spacing:.06em;margin-bottom:10px}
h1{font-size:clamp(30px,5.2vw,48px);line-height:1.2;letter-spacing:-.02em;font-weight:700}
h2{font-size:clamp(24px,3.4vw,32px);line-height:1.3;letter-spacing:-.015em;font-weight:700;margin-bottom:12px}
h3{font-size:17px;line-height:1.45;font-weight:650;margin-bottom:6px}
.lead{font-size:clamp(16px,2vw,18.5px);color:var(--muted);max-width:640px}
.sec-head{max-width:680px;margin-bottom:36px}
.sec-head p{color:var(--muted)}
.muted{color:var(--muted)}
.small{font-size:13.5px}

/* ---- 首屏 ---- */
.hero{padding:84px 0 64px}
.hero h1{max-width:760px;margin-bottom:18px}
.hero .lead{margin-bottom:30px}
.cta-row{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.cta-note{font-size:13.5px;color:var(--faint);margin-top:14px}

/* 首屏流程条 */
.flow{display:grid;grid-template-columns:repeat(5,1fr);gap:0;margin-top:56px;border:1px solid var(--line);border-radius:var(--r);background:var(--panel);overflow:hidden}
.flow li{list-style:none;padding:18px 18px 20px;border-right:1px solid var(--line);position:relative}
.flow li:last-child{border-right:none}
.flow .n{font-family:var(--mono);font-size:12px;color:var(--faint)}
.flow b{display:block;font-size:15.5px;margin:4px 0 4px}
.flow span{font-size:13.5px;color:var(--muted);line-height:1.6;display:block}
@media (max-width:860px){.flow{grid-template-columns:1fr 1fr}.flow li{border-bottom:1px solid var(--line)}.flow li:nth-child(2n){border-right:none}.flow li:last-child{grid-column:1/-1}}
@media (max-width:480px){.flow{grid-template-columns:1fr}.flow li{border-right:none}}

/* ---- 功能格 ---- */
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
@media (max-width:900px){.grid{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.grid{grid-template-columns:1fr}}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:22px 22px 20px}
.card p{font-size:14.5px;color:var(--muted);line-height:1.7}
.card .tag{display:inline-block;font-size:12px;font-weight:600;color:var(--pine);background:var(--pine-tint);border-radius:999px;padding:1px 9px;margin-bottom:10px}
.card .tag.free{color:var(--muted);background:var(--rail)}
.icon{width:34px;height:34px;border-radius:9px;background:var(--pine-tint);color:var(--pine);display:flex;align-items:center;justify-content:center;margin-bottom:14px}
.icon svg{width:18px;height:18px}

/* 两栏说明 */
.split{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
@media (max-width:820px){.split{grid-template-columns:1fr;gap:28px}}
.checks{list-style:none;display:grid;gap:14px}
.checks li{padding-left:28px;position:relative}
.checks li::before{content:"";position:absolute;left:2px;top:7px;width:14px;height:8px;border-left:2px solid var(--pine);border-bottom:2px solid var(--pine);transform:rotate(-45deg)}
.checks b{display:block;font-weight:650}
.checks span{color:var(--muted);font-size:14.5px}

/* 平台徽标 */
.plats{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.plat{display:inline-flex;align-items:center;gap:8px;background:var(--panel);border:1px solid var(--line);border-radius:999px;padding:6px 14px 6px 6px;font-size:14px}
.plat i{font-style:normal;width:24px;height:24px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;color:#fff;font-size:12px;font-weight:700}

/* ---- FAQ ---- */
.faq{max-width:780px}
.faq details{border-bottom:1px solid var(--line);padding:4px 0}
.faq summary{cursor:pointer;list-style:none;padding:14px 32px 14px 0;font-weight:600;position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"";position:absolute;right:6px;top:22px;width:8px;height:8px;border-right:1.5px solid var(--faint);border-bottom:1.5px solid var(--faint);transform:rotate(45deg);transition:transform .15s}
.faq details[open] summary::after{transform:rotate(-135deg);top:26px}
.faq details p{color:var(--muted);padding:0 0 16px;font-size:15px}

/* ---- 收尾 CTA ---- */
.end-cta{text-align:center}
.end-cta .cta-row{justify-content:center;margin-top:24px}
.end-cta .lead{margin:0 auto}

/* ---- 价格 ---- */
.plans{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
@media (max-width:900px){.plans{grid-template-columns:1fr}}
.plan{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:26px 24px;display:flex;flex-direction:column}
.plan.rec{border-color:var(--pine);box-shadow:0 0 0 1px var(--pine) inset}
.plan .pname{font-weight:650;display:flex;align-items:center;gap:8px}
.plan .badge{font-size:12px;background:var(--pine);color:#fff;border-radius:999px;padding:1px 9px;font-weight:600}
.plan .price{font-size:38px;font-weight:700;letter-spacing:-.02em;margin:12px 0 2px;color:var(--ink)}
.plan .price small{font-size:15px;font-weight:500;color:var(--muted);margin-left:2px}
.plan .per{font-size:13.5px;color:var(--muted);min-height:22px}
.plan .checks{margin:20px 0 24px;gap:9px;font-size:14.5px}
.plan .btn{margin-top:auto;width:100%}
.free-row{margin-top:14px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:18px 24px}
.free-row p{color:var(--muted);font-size:14.5px}

table.cmp{width:100%;border-collapse:collapse;background:var(--panel);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;font-size:14.5px}
table.cmp th,table.cmp td{padding:12px 16px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
table.cmp thead th{background:var(--rail);font-size:13.5px;color:var(--muted);font-weight:600}
table.cmp tr:last-child td{border-bottom:none}
table.cmp td:nth-child(2),table.cmp td:nth-child(3),table.cmp th:nth-child(2),table.cmp th:nth-child(3){width:24%}
table.cmp .yes{color:var(--pine);font-weight:600}
.tbl-scroll{overflow-x:auto;border-radius:var(--r)}

/* ---- 下载 ---- */
.dl-box{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:28px;display:flex;flex-wrap:wrap;gap:24px;align-items:center;justify-content:space-between}
.dl-meta{display:flex;flex-wrap:wrap;gap:6px 22px;font-size:14px;color:var(--muted);margin-top:8px}
.dl-meta b{color:var(--ink);font-weight:600;font-family:var(--mono);font-size:13.5px}
.steps{counter-reset:s;list-style:none;display:grid;gap:18px;max-width:760px}
.steps li{counter-increment:s;padding-left:44px;position:relative}
.steps li::before{content:counter(s);position:absolute;left:0;top:0;width:28px;height:28px;border-radius:50%;background:var(--pine-tint);color:var(--pine);font-weight:700;font-size:14px;display:flex;align-items:center;justify-content:center}
.steps b{display:block}
.steps span{color:var(--muted);font-size:14.5px}
code,kbd{font-family:var(--mono);font-size:.9em;background:var(--rail);border:1px solid var(--line);border-radius:5px;padding:1px 6px}

/* ---- 正文页(协议/说明) ---- */
.doc{max-width:760px;padding:56px 0 80px}
.doc h1{font-size:32px;margin-bottom:8px}
.doc .meta{color:var(--faint);font-size:14px;margin-bottom:32px}
.doc h2{font-size:20px;margin:32px 0 10px}
.doc p,.doc li{color:#33333A;font-size:15.5px}
.doc p+p{margin-top:10px}
.doc ul,.doc ol{padding-left:22px;display:grid;gap:6px;margin:8px 0}

/* ---- 页脚 ---- */
.foot{border-top:1px solid var(--line);padding:40px 0 48px;font-size:14px;color:var(--muted);background:var(--panel)}
.foot .cols{display:flex;flex-wrap:wrap;gap:32px 64px;justify-content:space-between}
.foot h4{font-size:13px;color:var(--faint);font-weight:600;margin-bottom:10px;letter-spacing:.04em}
.foot ul{list-style:none;display:grid;gap:6px}
.foot a{color:var(--muted)}
.foot a:hover{color:var(--ink)}
.foot .legal{margin-top:32px;padding-top:20px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;gap:6px 18px;font-size:13px;color:var(--faint)}
.foot .legal a{color:var(--faint)}
a:empty{display:none}

/* ---- 购买弹窗 ---- */
.modal{position:fixed;inset:0;z-index:50;background:rgba(24,24,27,.42);display:flex;align-items:center;justify-content:center;padding:16px}
.modal[hidden]{display:none}
.sheet{background:var(--panel);border-radius:14px;width:100%;max-width:440px;max-height:calc(100vh - 32px);overflow:auto;padding:26px 26px 22px;position:relative;box-shadow:0 20px 60px rgba(0,0,0,.18)}
.sheet h3{font-size:19px;margin-bottom:4px}
.sheet .x{position:absolute;right:14px;top:12px;width:32px;height:32px;border-radius:8px;border:none;background:none;cursor:pointer;color:var(--faint);font-size:22px;line-height:1}
.sheet .x:hover{background:var(--rail);color:var(--ink)}
.field{margin-top:18px}
.field>label,.field>.lbl{display:block;font-size:13.5px;font-weight:600;margin-bottom:8px}
.seg{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.seg.three{grid-template-columns:repeat(3,1fr)}
.seg label{display:block;cursor:pointer}
.seg input{position:absolute;opacity:0;pointer-events:none}
.seg span{display:block;border:1px solid var(--line-strong);border-radius:var(--r-s);padding:9px 10px;text-align:center;font-size:14px;line-height:1.35}
.seg span small{display:block;color:var(--muted);font-size:12.5px}
.seg input:checked+span{border-color:var(--pine);background:var(--pine-tint);color:var(--pine-deep);font-weight:600}
.seg input:focus-visible+span{outline:2px solid var(--pine);outline-offset:2px}
.seg input:disabled+span{opacity:.45;cursor:not-allowed}
.inp{width:100%;font:inherit;font-size:14.5px;border:1px solid var(--line-strong);border-radius:var(--r-s);padding:9px 12px;background:#fff;font-family:var(--mono)}
.inp:focus{outline:none;border-color:var(--pine);box-shadow:0 0 0 3px var(--pine-tint)}
.hint{font-size:13px;color:var(--muted);margin-top:6px}
.err{font-size:13.5px;color:#B3261E;margin-top:12px;min-height:0}
.err:empty{display:none}
.sheet .btn-primary{width:100%;margin-top:22px}
.qr{display:flex;flex-direction:column;align-items:center;text-align:center;padding:10px 0 4px}
.qr img{width:216px;height:216px;border:1px solid var(--line);border-radius:10px;margin:14px 0 10px;image-rendering:pixelated}
.qr .amt{font-size:28px;font-weight:700}
.qr .status{font-size:14px;color:var(--muted);display:flex;align-items:center;gap:8px;margin-top:6px}
.spin{width:12px;height:12px;border-radius:50%;border:1.5px solid var(--pine);border-top-color:transparent;animation:spin .8s linear infinite;display:inline-block}
@keyframes spin{to{transform:rotate(360deg)}}
.keybox{display:flex;align-items:center;gap:8px;background:var(--pine-tint);border-radius:var(--r-s);padding:12px 14px;margin:16px 0 6px}
.keybox code{background:none;border:none;font-size:16px;font-weight:700;color:var(--pine-deep);flex:1;word-break:break-all;padding:0}
.done-steps{text-align:left;font-size:14px;color:var(--muted);padding-left:20px;display:grid;gap:4px;margin-top:12px}
.linkbtn{background:none;border:none;font:inherit;color:var(--pine);cursor:pointer;padding:0;font-size:13.5px}
.linkbtn:hover{text-decoration:underline}
.recent{margin-top:14px;font-size:13.5px;color:var(--muted)}
.recent[hidden]{display:none}

@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;animation-duration:.01ms!important;transition:none!important}}
.skip{position:absolute;left:-999px;top:8px;z-index:30;background:var(--panel);padding:6px 12px;border-radius:var(--r-s)}
.skip:focus{left:12px}