/* NekoBox 教程页 — 独立样式，不依赖站点其它 CSS */
:root{
  --text:#172033;
  --muted:#667085;
  --line:rgba(148,163,184,.25);
  --pink:#ec4899;
  --deep:#db2777;
  --soft:#fdf2f8;
  --shadow:0 24px 60px rgba(157,23,77,.12);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;min-width:320px;color:var(--text);
  background:radial-gradient(circle at 8% 5%,rgba(244,114,182,.20),transparent 28%),radial-gradient(circle at 92% 16%,rgba(168,85,247,.13),transparent 26%),linear-gradient(180deg,#fff7fb 0%,#f8fafc 48%,#fff 100%);
  font-family:Inter,"PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  line-height:1.65;-webkit-font-smoothing:antialiased;
}
a{color:inherit}
button,a{-webkit-tap-highlight-color:transparent}
.container{width:min(1160px,calc(100% - 40px));margin:auto}

/* 顶栏 */
.topbar{position:sticky;top:0;z-index:50;border-bottom:1px solid rgba(255,255,255,.8);background:rgba(255,247,251,.82);backdrop-filter:blur(18px)}
.topbar-inner{min-height:70px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:flex;align-items:center;gap:12px;font-size:17px;font-weight:800;text-decoration:none}
.brand img{width:40px;height:40px;border-radius:12px;box-shadow:0 10px 24px rgba(236,72,153,.2)}
.top-actions{display:flex;gap:10px}
.top-actions a{min-height:42px;display:flex;align-items:center;padding:0 16px;border:1px solid var(--line);border-radius:999px;background:rgba(255,255,255,.72);color:#475467;font-size:14px;font-weight:700;text-decoration:none;transition:.2s}
.top-actions a:hover{color:var(--deep);border-color:rgba(236,72,153,.36);transform:translateY(-1px)}

/* 首屏 */
.hero{padding:96px 0 52px;text-align:center}
.eyebrow{display:inline-flex;align-items:center;gap:8px;margin-bottom:18px;padding:7px 13px;border:1px solid rgba(236,72,153,.22);border-radius:999px;background:rgba(255,255,255,.78);color:var(--deep);font-size:13px;font-weight:800;box-shadow:0 10px 30px rgba(236,72,153,.09)}
.eyebrow:before{width:8px;height:8px;content:"";border-radius:50%;background:var(--pink);box-shadow:0 0 0 5px rgba(236,72,153,.13)}
h1{max-width:860px;margin:0 auto;font-size:clamp(40px,7vw,72px);line-height:1.08;letter-spacing:-.05em}
h1 span{color:transparent;background:linear-gradient(100deg,#f472b6 5%,#db2777 48%,#a855f7 100%);background-clip:text;-webkit-background-clip:text}
.hero>p{max-width:700px;margin:24px auto 0;color:var(--muted);font-size:18px}

/* 通用区块 */
.section{padding:54px 0}
.section-heading{display:flex;align-items:end;justify-content:space-between;gap:30px;margin-bottom:26px}
.section-heading>p{max-width:470px;margin:0;color:var(--muted);font-size:15px}
.kicker{margin:0 0 8px;color:var(--deep);font-size:13px;font-weight:800;letter-spacing:.04em}
h2{margin:0;font-size:clamp(28px,4vw,42px);line-height:1.2;letter-spacing:-.035em}

/* 下载卡 */
.download-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;max-width:760px;margin:0 auto}
.download-card{position:relative;min-height:330px;display:flex;flex-direction:column;align-items:center;text-align:center;padding:26px;border:1px solid var(--line);border-radius:28px;background:rgba(255,255,255,.86);box-shadow:0 16px 45px rgba(71,84,103,.08);backdrop-filter:blur(18px);transition:.25s}
.download-card:hover{border-color:rgba(236,72,153,.28);transform:translateY(-5px);box-shadow:var(--shadow)}
.recommend-badge{position:absolute;top:18px;right:18px;padding:5px 10px;border-radius:999px;color:#9d174d;background:#fce7f3;font-size:12px;font-weight:800}
.platform-icon{width:64px;height:64px;display:grid;place-items:center;margin-bottom:22px;border:1px solid #fce7f3;border-radius:18px;background:#fdf2f8;color:var(--deep);font-size:30px;line-height:1;box-shadow:inset 0 1px 2px rgba(219,39,119,.06)}
.download-card h3{margin:0;font-size:23px}
.download-card>p{margin:8px 0 0;color:var(--muted);font-size:14px}
.tags{display:flex;flex-wrap:wrap;justify-content:center;gap:8px;margin:18px 0 24px}
.tags span{padding:5px 9px;border-radius:8px;background:#f2f4f7;color:#475467;font-size:12px;font-weight:700}
.download-button{width:100%;min-height:48px;margin-top:auto;display:inline-flex;align-items:center;justify-content:center;border-radius:14px;color:#fff;background:linear-gradient(135deg,var(--pink),var(--deep));box-shadow:0 14px 30px rgba(219,39,119,.23);font-size:15px;font-weight:800;text-decoration:none;transition:.2s}
.download-button:hover{transform:translateY(-2px);box-shadow:0 18px 36px rgba(219,39,119,.29)}
.tip{margin-top:22px;padding:18px 20px;border:1px solid rgba(219,39,119,.16);border-radius:18px;background:rgba(253,242,248,.8);color:#344054;font-size:14px}
.tip strong{color:#be185d}

/* 教程布局 */
.tutorial-layout{display:grid;grid-template-columns:260px minmax(0,1fr);align-items:start;gap:28px}
.tutorial-nav{position:sticky;top:96px;padding:20px;border:1px solid var(--line);border-radius:20px;background:rgba(255,255,255,.8);box-shadow:0 16px 40px rgba(71,84,103,.07);backdrop-filter:blur(16px)}
.tutorial-nav strong{display:block;margin-bottom:12px;font-size:14px}
.nav-groups{display:grid;gap:8px}
.nav-group{border-radius:12px}
.nav-toggle{width:100%;display:flex;align-items:center;justify-content:space-between;gap:8px;padding:9px 12px;border:0;border-radius:10px;background:var(--soft);color:#be185d;font-family:inherit;font-size:13px;font-weight:800;letter-spacing:.02em;cursor:pointer;transition:.2s}
.nav-toggle:hover{background:#fce7f3}
.nav-toggle i{font-size:11px;transition:transform .2s}
.nav-group[data-open="false"] .nav-toggle i{transform:rotate(-90deg)}
.nav-group[data-open="false"] .nav-links{display:none}
.nav-links{display:grid;gap:2px;margin-top:6px}
.nav-links a{display:flex;align-items:center;gap:10px;padding:9px 11px;border-radius:10px;color:#667085;font-size:13px;font-weight:700;text-decoration:none;transition:.2s}
.nav-links a:hover{color:var(--deep);background:var(--soft)}
.nav-links b{width:24px;height:24px;display:grid;place-items:center;flex:0 0 auto;border-radius:8px;background:#f2f4f7;color:#475467;font-size:12px}

.tutorial-list{display:grid;gap:38px}
.guide-group{display:grid;gap:22px}
.guide-head{scroll-margin-top:92px;margin:0;padding-left:14px;border-left:4px solid var(--pink);font-size:22px;line-height:1.35;letter-spacing:-.02em}
.tutorial-step{scroll-margin-top:92px;overflow:hidden;border:1px solid var(--line);border-radius:28px;background:#fff;box-shadow:0 18px 50px rgba(71,84,103,.08)}
.step-copy{display:flex;align-items:flex-start;gap:16px;padding:24px 26px 20px}
.step-copy>b{width:42px;height:42px;display:grid;place-items:center;flex:0 0 auto;border-radius:14px;color:#fff;background:linear-gradient(135deg,#f472b6,var(--deep));box-shadow:0 10px 22px rgba(219,39,119,.22)}
.step-copy h3{margin:1px 0 5px;font-size:20px}
.step-copy p{margin:0;color:var(--muted);font-size:15px}

/* 截图：手机竖屏居中，桌面截图放宽 */
.tutorial-image{position:relative;width:100%;display:block;padding:22px;overflow:hidden;border:0;border-top:1px solid var(--line);background:linear-gradient(180deg,#fff7fb,#fdf2f8);cursor:zoom-in}
.tutorial-image img{display:block;width:auto;max-width:min(420px,100%);margin:0 auto;border-radius:14px;background:#fff;box-shadow:0 12px 30px rgba(190,24,93,.16);transition:.3s}
.tutorial-image:hover img{transform:scale(1.01)}
.tutorial-image.is-wide img{max-width:min(560px,100%)}
.tutorial-image.is-desktop img{width:100%;max-width:min(820px,100%);border-radius:10px;box-shadow:0 10px 24px rgba(15,23,42,.12)}
.tutorial-image span{position:absolute;right:16px;bottom:16px;padding:7px 11px;border-radius:999px;color:#fff;background:rgba(15,23,42,.72);font-size:12px;font-weight:700}
.tutorial-image em{min-height:180px;display:none;align-items:center;justify-content:center;padding:24px;color:#667085;font-style:normal}
.tutorial-image.failed em{display:flex}
.tutorial-image.failed img,.tutorial-image.failed span{display:none}

/* 注意项 */
.notice-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.notice-grid article{padding:24px;border:1px solid var(--line);border-radius:20px;background:rgba(255,255,255,.72)}
.notice-grid strong{display:block;margin-bottom:7px;font-size:15px}
.notice-grid p{margin:0;color:var(--muted);font-size:14px}

footer{padding:44px 20px 56px;color:#98a2b3;text-align:center;font-size:13px}

/* 灯箱 */
.lightbox{position:fixed;inset:0;z-index:100;display:none;align-items:center;justify-content:center;padding:24px;background:rgba(15,23,42,.88);backdrop-filter:blur(10px)}
.lightbox.open{display:flex}
.lightbox img{max-width:min(1400px,96vw);max-height:90vh;border-radius:16px;background:#fff;box-shadow:0 30px 90px rgba(0,0,0,.42)}
.lightbox button{position:fixed;top:22px;right:24px;width:44px;height:44px;border:1px solid rgba(255,255,255,.22);border-radius:50%;color:#fff;background:rgba(255,255,255,.12);font-size:26px;cursor:pointer}

@media(max-width:900px){
  .download-grid,.notice-grid{grid-template-columns:1fr}
  .download-card{min-height:0}
  .tutorial-layout{grid-template-columns:1fr}
  .tutorial-nav{position:static;padding:14px}
}
@media(max-width:680px){
  .container{width:min(100% - 28px,1160px)}
  .topbar-inner{min-height:62px;gap:10px}
  .brand{gap:9px;min-width:0}
  .brand img{width:38px;height:38px}
  .brand span{font-size:14px;white-space:nowrap}
  .top-actions{margin-left:auto;gap:8px}
  .top-actions a{min-height:40px;padding:0 13px;font-size:13px}
  .top-actions a:first-child{display:none}
  .hero{padding:50px 0 24px}
  h1{max-width:350px;font-size:clamp(34px,10.8vw,44px);line-height:1.12;letter-spacing:-.045em}
  .hero>p{max-width:350px;margin-top:20px;font-size:15px;line-height:1.75}
  .section{padding:34px 0}
  .section-heading{display:block;margin-bottom:20px}
  .section-heading>p{margin-top:10px;font-size:14px;line-height:1.65}
  h2{font-size:30px}
  .download-card{padding:20px;border-radius:20px}
  .platform-icon{width:56px;height:56px;margin-bottom:18px;border-radius:16px;font-size:27px}
  .download-card h3{font-size:22px}
  .tags{margin:14px 0 20px}
  .tip{margin-top:16px;padding:15px 16px;border-radius:16px;line-height:1.65}
  .tutorial-layout{gap:16px}
  .tutorial-nav{border-radius:16px}
  .nav-links a{padding:8px 9px}
  .tutorial-list{gap:28px}
  .guide-group{gap:16px}
  .guide-head{font-size:19px;padding-left:11px;border-left-width:3px}
  .tutorial-step{border-radius:20px}
  .step-copy{gap:13px;padding:18px 16px 15px}
  .step-copy>b{width:36px;height:36px;border-radius:11px}
  .step-copy h3{font-size:17px;line-height:1.4}
  .step-copy p{font-size:14px;line-height:1.65}
  .tutorial-image{padding:14px}
  .tutorial-image span{display:none}
  .notice-grid article{padding:19px}
  .lightbox{padding:12px}
  .lightbox img{max-width:100%;border-radius:10px}
  .lightbox button{top:12px;right:12px}
}
@media(max-width:380px){
  .container{width:calc(100% - 22px)}
  h1{font-size:34px}
  .top-actions a{padding:0 11px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*:before,*:after{transition-duration:.01ms!important}
}