/* trenmi · 云起画布 · 轻奢苹果风
   苹果排印骨架：大留白 / 居中大字 / 负字距 / 灰底浮卡
   品牌色克制使用：藏蓝 #002448（footer、深色卡）· 青绿 #06B096（CTA、强调）
*/
:root {
  --white:#ffffff;
  --bg:#fff;
  --bg-gray:#f5f5f7;
  --card:#f5f5f7;
  --card-hover:#fff;
  --ink:#1d1d1f;
  --ink-2:#6e6e73;
  --ink-3:#86868b;
  --line:#d8d8dd;
  --line-soft:#ececf0;

  --navy:#002448; --navy-deep:#00182f; --navy-mid:#0a3159; --navy-mid-2:#123a5e;
  --teal:#06b096; --teal-hover:#059a84; --teal-light:#3fd0b0; --teal-tint:#e7f5f1;

  --on-dark-1:#f5f5f7; --on-dark-2:#a1a1a6; --on-dark-3:#86868b; --on-dark-4:#6e6e73;

  --font-sans:"SF Pro Display","SF Pro Text","PingFang SC","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  --font-display:"SF Pro Display","Outfit","PingFang SC",-apple-system,sans-serif;

  --maxw:1140px; --gutter:24px;
  --radius:22px; --radius-sm:16px; --radius-pill:980px;

  --ease-out:cubic-bezier(.16,1,.3,1);
}
@media (min-width:768px){ :root{ --gutter:48px; } }

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--font-sans);
  color:var(--ink);
  background:var(--bg);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  letter-spacing:-.01em;
}
a{color:inherit;text-decoration:none}
img,svg{display:block;max-width:100%}
.wrap{max-width:var(--maxw);margin:0 auto;padding-left:var(--gutter);padding-right:var(--gutter)}

/* ============ Frosted Header（苹果风磨砂导航） ============ */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(255,255,255,.72);
  backdrop-filter:saturate(180%) blur(20px);
  -webkit-backdrop-filter:saturate(180%) blur(20px);
  border-bottom:1px solid rgba(0,0,0,.07);
}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:56px;gap:16px}
.brand{display:flex;align-items:center;gap:9px;flex-shrink:0}
.brand-logo{width:28px;height:28px}
.brand-name{font-family:var(--font-display);font-size:17px;font-weight:600;letter-spacing:-.02em}
.nav{display:flex;align-items:center;gap:28px}
.nav a{font-size:13.5px;font-weight:400;color:rgba(29,29,31,.82);transition:color .2s;white-space:nowrap}
.nav a:hover{color:var(--ink)}
.nav a.active{color:var(--teal)}
.nav-cta{
  display:inline-flex;align-items:center;
  padding:7px 16px;
  border-radius:var(--radius-pill);
  background:var(--ink);color:#fff!important;
  font-size:13px;font-weight:500;letter-spacing:-.01em;
  transition:background .2s,transform .2s;flex-shrink:0;
}
.nav-cta:hover{background:#333}

/* ============ Buttons ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:13px 27px;
  border-radius:var(--radius-pill);
  font-size:16px;font-weight:500;letter-spacing:-.01em;
  border:none;cursor:pointer;
  transition:transform .25s var(--ease-out),background .2s,box-shadow .2s,color .2s,border-color .2s;
}
.btn:active{transform:scale(.97)}
.btn-primary{background:var(--teal);color:#fff}
.btn-primary:hover{background:var(--teal-hover)}
.btn-dark{background:var(--ink);color:#fff}
.btn-dark:hover{background:#333}
.btn-outline-light{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.35)}
.btn-outline-light:hover{background:rgba(255,255,255,.1);border-color:#fff}
.btn-ghost{background:rgba(0,0,0,.05);color:var(--ink)}
.btn-ghost:hover{background:rgba(0,0,0,.09)}
.btn-lg{padding:15px 32px;font-size:17px}

.eyebrow{
  display:inline-block;
  font-size:13px;font-weight:600;
  letter-spacing:.02em;
  color:var(--teal);
}

/* ============ Hero（居中大字 · 产品图在下） ============ */
.hero{background:var(--white);padding:96px 0 72px;text-align:center}
.hero .wrap{display:flex;flex-direction:column;align-items:center;gap:0}
.hero-left{display:flex;flex-direction:column;align-items:center;gap:20px;max-width:780px}
.hero-eyebrow{font-size:13px;font-weight:600;color:var(--ink-3);letter-spacing:.04em;text-transform:uppercase}
.hero-title{
  font-size:clamp(42px,6.4vw,70px);
  font-weight:600;
  line-height:1.06;
  letter-spacing:-.028em;
  color:var(--ink);
}
.hero-title em{font-style:normal;color:var(--teal)}
.hero-sub{font-size:clamp(17px,2vw,21px);line-height:1.55;letter-spacing:-.015em;color:var(--ink-2);max-width:600px;font-weight:400}
.hero-ctas{display:flex;gap:14px;flex-wrap:wrap;justify-content:center;margin-top:4px}
.hero-trust{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-3);margin-top:2px}
.hero-trust .dot{width:4px;height:4px;border-radius:50%;background:var(--teal)}

/* 产品截图式画布 */
.canvas-mock{
  width:100%;max-width:980px;
  margin:64px auto 0;
  background:linear-gradient(160deg,#0a2a4d,#00182f);
  border-radius:20px;
  padding:18px;
  box-shadow:0 40px 90px rgba(0,24,47,.28),0 8px 24px rgba(0,24,47,.16);
  text-align:left;
}
.canvas-mock .toolbar{display:flex;align-items:center;justify-content:space-between;padding:9px 14px;background:rgba(255,255,255,.05);border-radius:10px;margin-bottom:14px}
.canvas-mock .dots{display:flex;gap:6px}
.canvas-mock .dots span{width:9px;height:9px;border-radius:50%;background:rgba(255,255,255,.22)}
.canvas-mock .dots span.live{background:var(--teal)}
.canvas-mock .tool-label{font-size:11.5px;color:rgba(245,245,247,.55);background:rgba(0,0,0,.25);padding:4px 11px;border-radius:var(--radius-pill)}
.canvas-mock .nodes{display:grid;grid-template-columns:repeat(3,1fr);gap:11px}
.canvas-mock .node{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.06);border-radius:13px;padding:14px 16px;min-height:74px;transition:background .25s,transform .25s}
.canvas-mock .node:hover{background:rgba(255,255,255,.11);transform:translateY(-2px)}
.canvas-mock .node .tag{font-size:10.5px;font-weight:600;color:var(--teal-light);margin-bottom:6px;letter-spacing:.02em}
.canvas-mock .node .body{font-size:13.5px;font-weight:500;color:#f5f5f7;line-height:1.45;letter-spacing:-.01em}

/* ============ Section ============ */
.section{padding:110px 0}
.section.gray{background:var(--bg-gray)}
.section.dark{background:var(--navy);color:var(--on-dark-1)}
.section-head{max-width:720px;margin:0 auto 64px;text-align:center;display:flex;flex-direction:column;gap:14px;align-items:center}
.section-head h2{
  font-size:clamp(29px,4vw,44px);
  font-weight:600;line-height:1.1;
  letter-spacing:-.025em;
}
.section-head p{font-size:clamp(16px,1.6vw,19px);line-height:1.55;color:var(--ink-2);letter-spacing:-.012em;max-width:560px}
.section.dark .section-head p{color:var(--on-dark-2)}

/* ============ Hub 六卡（灰底浮卡） ============ */
.hub{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.hub a{
  background:var(--card);
  border-radius:var(--radius);
  padding:32px 30px;
  display:flex;flex-direction:column;gap:13px;
  transition:background .35s var(--ease-out),box-shadow .35s var(--ease-out),transform .35s var(--ease-out);
}
.hub a:hover{background:var(--card-hover);box-shadow:0 22px 50px rgba(0,0,0,.1);transform:translateY(-4px)}
.hub a.navy{background:linear-gradient(165deg,#0a3159,#00182f)}
.hub a.navy:hover{box-shadow:0 26px 60px rgba(0,24,47,.35)}
.hub .h-cat{font-size:11px;font-weight:600;letter-spacing:.09em;text-transform:uppercase;color:var(--ink-3)}
.hub a.navy .h-cat{color:rgba(245,245,247,.5)}
.hub .h-ic{
  width:46px;height:46px;border-radius:13px;
  background:#fff;
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 2px 8px rgba(0,0,0,.05);
}
.hub a.navy .h-ic{background:rgba(255,255,255,.08);box-shadow:none}
.hub h3{font-size:20px;font-weight:600;letter-spacing:-.02em}
.hub p{font-size:14.5px;line-height:1.6;color:var(--ink-2);letter-spacing:-.01em}
.hub a.navy p{color:rgba(245,245,247,.65)}
.hub .h-go{margin-top:auto;font-size:14px;font-weight:500;color:var(--teal)}
.hub a.navy .h-go{color:var(--teal-light)}

/* ============ 通用浮卡 ============ */
.features{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.feature{
  background:var(--card);border-radius:var(--radius);
  padding:32px 30px;
  display:flex;flex-direction:column;gap:14px;
  transition:background .35s var(--ease-out),box-shadow .35s var(--ease-out),transform .35s var(--ease-out);
}
.feature:hover{background:#fff;box-shadow:0 20px 48px rgba(0,0,0,.09);transform:translateY(-3px)}
.feature.navy{background:linear-gradient(165deg,#0a3159,#00182f)}
.feature.navy:hover{box-shadow:0 24px 56px rgba(0,24,47,.32)}
.feature .f-ic{
  width:46px;height:46px;border-radius:13px;
  background:#fff;display:flex;align-items:center;justify-content:center;
  box-shadow:0 2px 8px rgba(0,0,0,.05);
}
.feature.navy .f-ic{background:rgba(255,255,255,.08);box-shadow:none}
.feature h3{font-size:19px;font-weight:600;letter-spacing:-.02em}
.feature p{font-size:14.5px;line-height:1.62;color:var(--ink-2);letter-spacing:-.01em}
.feature.navy p{color:rgba(245,245,247,.65)}

/* ============ Steps ============ */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.step{
  background:var(--card);border-radius:var(--radius);
  padding:32px 30px;
  transition:background .35s var(--ease-out),box-shadow .35s var(--ease-out),transform .35s var(--ease-out);
}
.step:hover{background:#fff;box-shadow:0 20px 48px rgba(0,0,0,.09);transform:translateY(-3px)}
.step .no{font-size:12px;font-weight:600;color:var(--teal);margin-bottom:14px;letter-spacing:.06em;text-transform:uppercase}
.step h3{font-size:19px;font-weight:600;margin-bottom:10px;letter-spacing:-.02em}
.step p{font-size:14.5px;line-height:1.62;color:var(--ink-2);letter-spacing:-.01em}

/* ============ 课程结构 ============ */
.phases{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:64px}
.phase{background:var(--card);border-radius:var(--radius-sm);padding:26px 24px;transition:background .3s,box-shadow .3s,transform .3s}
.phase:hover{background:#fff;box-shadow:0 16px 40px rgba(0,0,0,.08);transform:translateY(-3px)}
.phase .p-no{font-size:11px;font-weight:600;color:var(--teal);letter-spacing:.07em;text-transform:uppercase;margin-bottom:10px}
.phase h3{font-size:17px;font-weight:600;margin-bottom:7px;letter-spacing:-.02em}
.phase p{font-size:13.5px;color:var(--ink-2);line-height:1.55}

.mod-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.mod{background:var(--card);border-radius:var(--radius-sm);padding:26px 24px;transition:background .3s,box-shadow .3s,transform .3s}
.mod:hover{background:#fff;box-shadow:0 16px 40px rgba(0,0,0,.08);transform:translateY(-3px)}
.mod .m-no{font-size:11px;font-weight:600;color:var(--teal);letter-spacing:.07em;text-transform:uppercase;margin-bottom:10px}
.mod h3{font-size:16.5px;font-weight:600;margin-bottom:7px;letter-spacing:-.02em}
.mod p{font-size:13.5px;line-height:1.58;color:var(--ink-2)}

/* ============ CTA（浅灰居中 · 克制） ============ */
.cta-band{background:var(--bg-gray);padding:110px 0;text-align:center}
.cta-band .wrap{display:flex;flex-direction:column;align-items:center;gap:0}
.cta-band h2{font-size:clamp(29px,4vw,46px);font-weight:600;line-height:1.1;letter-spacing:-.027em;color:var(--ink)}
.cta-band p{margin-top:16px;font-size:clamp(16px,1.6vw,19px);line-height:1.55;color:var(--ink-2);max-width:540px;letter-spacing:-.012em}
.cta-band .btns{display:flex;gap:14px;flex-wrap:wrap;justify-content:center;margin-top:32px}

/* ============ 内页 Hero（居中） ============ */
.inner-hero{background:var(--white);padding:104px 0 96px;text-align:center}
.inner-hero .wrap{max-width:800px;display:flex;flex-direction:column;align-items:center;gap:18px}
.breadcrumb{font-size:13px;color:var(--ink-3)}
.breadcrumb a:hover{color:var(--ink)}
.inner-hero h1{font-size:clamp(36px,5.4vw,58px);font-weight:600;line-height:1.08;letter-spacing:-.028em;color:var(--ink)}
.inner-hero .sub{font-size:clamp(17px,2vw,20px);line-height:1.55;color:var(--ink-2);max-width:600px;letter-spacing:-.013em}
.inner-hero .btns{display:flex;gap:14px;flex-wrap:wrap;justify-content:center;margin-top:6px}

/* ============ 文档卡 ============ */
.doc-card{
  display:flex;align-items:center;gap:24px;
  background:var(--card);border-radius:var(--radius);
  padding:34px 36px;max-width:780px;margin:0 auto;
  transition:background .3s,box-shadow .3s,transform .3s;
}
.doc-card:hover{background:#fff;box-shadow:0 20px 48px rgba(0,0,0,.09);transform:translateY(-3px)}
.doc-card .d-ic{
  width:54px;height:54px;border-radius:15px;
  background:#fff;display:flex;align-items:center;justify-content:center;flex-shrink:0;
  box-shadow:0 2px 8px rgba(0,0,0,.05);
}
.doc-card h3{font-size:20px;font-weight:600;margin-bottom:6px;letter-spacing:-.02em}
.doc-card p{font-size:14.5px;color:var(--ink-2);line-height:1.6}

/* ============ FAQ ============ */
.faq{display:flex;flex-direction:column;gap:12px;max-width:800px;margin:0 auto}
.faq details{
  background:var(--card);border-radius:var(--radius-sm);
  padding:22px 28px;
  transition:background .25s;
}
.faq details:hover{background:#fff}
.faq summary{font-size:16.5px;font-weight:500;cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center;letter-spacing:-.015em}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:22px;font-weight:300;color:var(--ink-3);transition:transform .25s}
.faq details[open] summary::after{content:"−"}
.faq details p{margin-top:12px;font-size:14.5px;color:var(--ink-2);line-height:1.7}

/* ============ 留资卡 ============ */
.contact-card{
  background:linear-gradient(165deg,#0a3159,#00182f);
  border-radius:var(--radius);
  padding:44px;
  display:grid;grid-template-columns:1fr auto;gap:32px;align-items:center;
  max-width:800px;margin:0 auto;
  box-shadow:0 30px 70px rgba(0,24,47,.25);
}
.contact-card h3{font-size:23px;font-weight:600;margin-bottom:10px;letter-spacing:-.02em;color:#f5f5f7}
.contact-card p{font-size:14.5px;color:rgba(245,245,247,.6);line-height:1.7}
.qr-slot{
  background:#fff;border-radius:15px;
  width:168px;height:168px;
  display:flex;align-items:center;justify-content:center;
  color:var(--ink-3);font-size:12px;text-align:center;padding:18px;
}

/* ============ Footer（深藏蓝 · 极简） ============ */
.site-footer{background:var(--navy-deep);color:var(--on-dark-2);padding:64px 0 36px}
.site-footer .top{display:flex;justify-content:space-between;gap:48px;flex-wrap:wrap}
.f-brand{display:flex;align-items:center;gap:9px;margin-bottom:14px}
.f-brand .brand-logo{width:26px;height:26px}
.f-tag{font-size:13.5px;color:rgba(245,245,247,.45);max-width:320px;line-height:1.6}
.site-footer .cols{display:flex;gap:64px}
.site-footer .col h4{font-size:12px;font-weight:600;color:var(--teal-light);margin-bottom:12px;letter-spacing:.04em;text-transform:uppercase}
.site-footer .col a{display:block;font-size:13.5px;color:rgba(245,245,247,.6);padding:4px 0;transition:color .2s}
.site-footer .col a:hover{color:#fff}
.site-footer .bottom{
  margin-top:40px;padding-top:20px;
  border-top:1px solid rgba(255,255,255,.09);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:12.5px;color:rgba(245,245,247,.35);
}

/* ============ 灵音在线播放器 ============ */
.m-tabs{display:flex;gap:8px;justify-content:center;margin-bottom:36px}
.m-tab{padding:9px 22px;border-radius:var(--radius-pill);font-size:14px;font-weight:500;border:none;cursor:pointer;background:rgba(0,0,0,.05);color:var(--ink-2);transition:background .2s,color .2s;letter-spacing:-.01em}
.m-tab.on{background:var(--ink);color:#fff}
.m-pane{display:none}.m-pane.on{display:block}
.m-search{display:flex;gap:10px;max-width:560px;margin:0 auto 34px}
.m-search input{flex:1;padding:13px 20px;border-radius:var(--radius-pill);border:1px solid var(--line);background:#fff;color:var(--ink);font-size:15px;outline:none;letter-spacing:-.01em;font-family:inherit;transition:border-color .2s,box-shadow .2s}
.m-search input:focus{border-color:var(--ink);box-shadow:0 0 0 4px rgba(0,0,0,.06)}
.track-list{display:flex;flex-direction:column;gap:10px;max-width:720px;margin:0 auto}
.track{display:flex;align-items:center;gap:15px;background:var(--card);border-radius:var(--radius-sm);padding:12px 16px;cursor:pointer;transition:background .25s,transform .25s,box-shadow .25s}
.track:hover{background:#fff;box-shadow:0 10px 30px rgba(0,0,0,.08);transform:translateY(-2px)}
.track.playing{background:#fff;box-shadow:0 0 0 1.5px var(--teal),0 10px 30px rgba(6,176,150,.14)}
.track .t-cover{width:48px;height:48px;border-radius:10px;object-fit:cover;flex-shrink:0;background:#e5e5ea}
.track .t-info{flex:1;min-width:0}
.track .t-name{font-size:15px;font-weight:600;letter-spacing:-.01em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.track .t-artist{font-size:13px;color:var(--ink-2);margin-top:2px}
.track .t-play{width:38px;height:38px;border-radius:50%;flex-shrink:0;background:var(--ink);color:#fff;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background .2s,transform .15s}
.track:hover .t-play{background:var(--teal)}
.track:active .t-play{transform:scale(.92)}
.track .t-del{border:none;background:transparent;color:var(--ink-3);cursor:pointer;font-size:20px;padding:4px 8px;flex-shrink:0}
.track .t-del:hover{color:#ff3b30}
.m-add{display:flex;gap:10px;max-width:720px;margin:0 auto 22px;flex-wrap:wrap}
.m-add input{flex:1;min-width:200px}
.m-note{max-width:720px;margin:26px auto 0;font-size:13px;color:var(--ink-3);line-height:1.7;text-align:center}
.player-bar{position:fixed;left:0;right:0;bottom:0;z-index:200;background:rgba(255,255,255,.8);backdrop-filter:saturate(180%) blur(22px);-webkit-backdrop-filter:saturate(180%) blur(22px);border-top:1px solid rgba(0,0,0,.08);padding:10px 0 34px;transform:translateY(110%);transition:transform .4s var(--ease-out)}
.player-bar.ready{transform:none}
.player-bar .wrap{display:grid;grid-template-columns:minmax(140px,1fr) 2.2fr minmax(90px,1fr);gap:20px;align-items:center}
.pb-info{display:flex;align-items:center;gap:11px;min-width:0}
.pb-cover{width:40px;height:40px;border-radius:9px;object-fit:cover;background:#e5e5ea;flex-shrink:0}
.pb-text{min-width:0}
.pb-name{font-size:13.5px;font-weight:600;letter-spacing:-.01em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.pb-artist{font-size:12px;color:var(--ink-2);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.pb-center{display:flex;flex-direction:column;align-items:center;gap:5px}
.pb-controls{display:flex;align-items:center;gap:18px}
.pb-btn{border:none;background:transparent;cursor:pointer;color:var(--ink);padding:2px;display:flex}
.pb-main{width:38px;height:38px;border-radius:50%;border:none;cursor:pointer;background:var(--ink);color:#fff;display:flex;align-items:center;justify-content:center;transition:transform .15s,background .2s}
.pb-main:hover{background:var(--teal)}
.pb-main:active{transform:scale(.92)}
.pb-progress{display:flex;align-items:center;gap:9px;width:100%;font-size:11px;color:var(--ink-3);font-variant-numeric:tabular-nums}
.seek{flex:1;height:4px;border-radius:2px;background:rgba(0,0,0,.12);cursor:pointer;position:relative;overflow:hidden}
.seek .fill{position:absolute;left:0;top:0;bottom:0;width:0;background:var(--teal);border-radius:2px}
.pb-vol{display:flex;align-items:center;gap:8px;justify-content:flex-end}
.vol-range{width:90px;height:4px;-webkit-appearance:none;appearance:none;background:rgba(0,0,0,.12);border-radius:2px;outline:none;cursor:pointer}
.vol-range::-webkit-slider-thumb{-webkit-appearance:none;width:13px;height:13px;border-radius:50%;background:var(--ink);cursor:pointer;border:none}
@media (max-width:640px){.player-bar .wrap{grid-template-columns:1fr auto;gap:10px}.pb-vol,.pb-artist{display:none}.pb-center{grid-column:1/-1;order:3}.player-bar{padding-bottom:10px}}

/* ============ 提示词库 ============ */
.prompt-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;max-width:900px;margin:0 auto}
.prompt-card{background:var(--card);border-radius:var(--radius-sm);padding:24px 26px;display:flex;flex-direction:column;gap:12px;transition:background .3s,box-shadow .3s,transform .3s}
.prompt-card:hover{background:#fff;box-shadow:0 16px 40px rgba(0,0,0,.09);transform:translateY(-3px)}
.prompt-card .p-cat{font-size:11px;font-weight:600;color:var(--teal);letter-spacing:.07em;text-transform:uppercase}
.prompt-card h3{font-size:17px;font-weight:600;letter-spacing:-.02em}
.prompt-card pre{background:rgba(0,0,0,.04);border-radius:11px;padding:15px 16px;font-size:12.5px;line-height:1.65;font-family:"SF Mono",ui-monospace,Menlo,Consolas,monospace;color:var(--ink-2);white-space:pre-wrap;word-break:break-word;max-height:220px;overflow:auto}
.prompt-card .p-actions{display:flex;gap:10px;margin-top:auto}
.prompt-card .p-actions button{padding:8px 18px;font-size:13px;border-radius:var(--radius-pill);border:none;cursor:pointer;font-weight:500;background:var(--ink);color:#fff;transition:background .2s}
.prompt-card .p-actions button:hover{background:var(--teal)}
.prompt-card .p-actions button.alt{background:rgba(0,0,0,.06);color:var(--ink)}
.prompt-card .p-actions button.alt:hover{background:rgba(0,0,0,.12)}
@media (max-width:640px){.prompt-grid{grid-template-columns:1fr}}


/* ============ 申请流程：1×4 / 2×2 ============ */
.steps-4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
@media (max-width:900px){ .steps-4{grid-template-columns:repeat(2,1fr)} }

/* ============ 课程宣言 ============ */
.manifesto{
  max-width:840px;margin:0 auto;text-align:center;
  display:flex;flex-direction:column;gap:26px;align-items:center;
}
.manifesto .m-path{display:flex;gap:14px;flex-wrap:wrap;justify-content:center}
.manifesto .m-path span{
  padding:11px 24px;border-radius:var(--radius-pill);
  background:rgba(0,0,0,.05);font-size:15px;font-weight:600;letter-spacing:-.01em;color:var(--ink);
}
.manifesto .m-path span.hl{background:var(--ink);color:#fff}
.manifesto h2{font-size:clamp(27px,3.6vw,40px);font-weight:600;line-height:1.18;letter-spacing:-.025em}
.manifesto .m-body{font-size:clamp(16px,1.7vw,19px);line-height:1.85;color:var(--ink-2);letter-spacing:-.01em;max-width:680px}
.manifesto .m-body strong{color:var(--ink);font-weight:600}
.manifesto .m-final{
  font-size:clamp(19px,2.2vw,25px);font-weight:600;color:var(--ink);letter-spacing:-.02em;
}
.manifesto .m-final em{font-style:normal;color:var(--teal)}

/* ============ 双二维码 ============ */
.qr-pair{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.qr-box{background:#fff;border-radius:15px;padding:18px;text-align:center}
.qr-box img{width:100%;aspect-ratio:1;object-fit:contain;border-radius:8px}
.qr-box .q-cap{margin-top:10px;font-size:13.5px;font-weight:600;color:var(--ink)}
@media (max-width:560px){.qr-pair{grid-template-columns:1fr}}

/* 联系卡内容加宽 */
.contact-card.wide-qr{grid-template-columns:1fr;max-width:880px;text-align:center}
.contact-card.wide-qr .qr-pair{max-width:440px;margin:0 auto}


/* ============ 页脚横版小二维码 ============ */
.f-qr{display:flex;flex-direction:row;flex-wrap:nowrap;gap:14px;margin-top:20px;align-items:flex-start}
.f-qr .fq{flex:0 0 auto;text-align:center;width:88px}
.f-qr .fq img{width:88px;height:88px;border-radius:10px;background:#fff;padding:6px;display:block;object-fit:contain}
.f-qr .fq span{display:block;margin-top:7px;font-size:11px;color:rgba(245,245,247,.55);white-space:nowrap}
.f-left{flex:0 0 auto;max-width:300px}
@media (max-width:640px){
  .f-qr{gap:11px}
  .f-qr .fq{width:70px}
  .f-qr .fq img{width:70px;height:70px}
}

/* ============ 申请流程 1行4列 ============ */
.flow-4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
@media (max-width:760px){.flow-4{grid-template-columns:repeat(2,1fr)}}

/* ============ 提示词分类展示 ============ */
.pcat-block{margin-bottom:56px}
.pcat-block:last-child{margin-bottom:0}
.pcat-head{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:20px;gap:16px}
.pcat-head h3{font-size:23px;font-weight:600;letter-spacing:-.022em}
.pcat-head .pc-count{font-size:13px;color:var(--ink-3)}
.pcat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.pcat-grid .pc{
  background:var(--card);border-radius:var(--radius-sm);padding:22px 24px;
  display:flex;flex-direction:column;gap:11px;
  transition:background .3s var(--ease-out),box-shadow .3s,transform .3s;
}
.pcat-grid .pc:hover{background:#fff;box-shadow:0 14px 36px rgba(0,0,0,.08);transform:translateY(-2px)}
.pcat-grid .pc h4{font-size:16px;font-weight:600;letter-spacing:-.015em}
.pcat-grid .pc p{font-size:13.5px;color:var(--ink-2);line-height:1.6}
.pcat-grid .pc .pc-actions{margin-top:auto;display:flex;gap:8px}
.pcat-grid .pc button{
  padding:7px 16px;font-size:12.5px;border-radius:var(--radius-pill);border:none;cursor:pointer;
  background:var(--ink);color:#fff;font-weight:500;transition:background .2s;
}
.pcat-grid .pc button:hover{background:var(--teal)}
@media (max-width:640px){.pcat-grid{grid-template-columns:1fr}}

/* 下载地址大入口 */
.dl-entry{
  display:grid;grid-template-columns:auto 1fr auto;gap:24px;align-items:center;
  background:linear-gradient(160deg,#0a3159,#00182f);border-radius:22px;padding:38px 44px;color:#f5f5f7;
  max-width:900px;margin:0 auto;
  transition:transform .35s var(--ease-out),box-shadow .35s var(--ease-out);
}
.dl-entry:hover{transform:translateY(-4px);box-shadow:0 28px 60px rgba(0,24,47,.32)}
.dl-entry .de-ic{width:60px;height:60px;border-radius:16px;background:rgba(255,255,255,.08);display:flex;align-items:center;justify-content:center}
.dl-entry h2{font-size:clamp(20px,2.4vw,26px);font-weight:600;letter-spacing:-.02em;margin-bottom:7px}
.dl-entry p{font-size:14.5px;color:rgba(245,245,247,.58);line-height:1.6}
.dl-entry .de-go{padding:12px 24px;border-radius:var(--radius-pill);background:#fff;color:var(--navy);font-size:14.5px;font-weight:600;white-space:nowrap}
@media (max-width:640px){.dl-entry{grid-template-columns:1fr;text-align:center;padding:30px 24px;gap:16px}.dl-entry .de-ic{margin:0 auto}}

.pc-link{margin-top:auto;align-self:flex-start;font-size:13px;font-weight:600;color:var(--teal);transition:color .2s}
.pc-link:hover{color:var(--teal-hover)}


/* ============ 提示词方块库（一卡一条） ============ */
.prompt-cat{margin-bottom:60px}
.prompt-cat:last-child{margin-bottom:0}
.pcat-bar{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.pcat-pill{display:inline-block;padding:8px 22px;border-radius:var(--radius-pill);background:var(--ink);color:#fff;font-size:15px;font-weight:600;letter-spacing:-.01em}
.pcat-total{font-size:13.5px;color:var(--ink-3);font-weight:500}
.prompt-squares{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.sq{display:flex;flex-direction:column;gap:11px;background:var(--card);border-radius:var(--radius-sm);padding:22px 23px;transition:background .3s var(--ease-out),box-shadow .3s,transform .3s}
.sq:hover{background:#fff;box-shadow:0 16px 40px rgba(0,0,0,.09);transform:translateY(-3px)}
.sq-top{display:flex;align-items:flex-start;justify-content:space-between;gap:10px}
.sq h4{font-size:16px;font-weight:600;letter-spacing:-.015em;line-height:1.35}
.sq-dl{display:inline-flex;align-items:center;gap:4px;font-size:12px;color:var(--teal);font-weight:600;flex-shrink:0;font-variant-numeric:tabular-nums}
.sq p{font-size:13.5px;color:var(--ink-2);line-height:1.6}
.sq-go{margin-top:auto;font-size:12.5px;font-weight:600;color:var(--ink-3);transition:color .2s}
.sq:hover .sq-go{color:var(--teal)}
@media (max-width:900px){.prompt-squares{grid-template-columns:repeat(2,1fr)}}
@media (max-width:560px){.prompt-squares{grid-template-columns:1fr}}


/* ============ 播放器下载页 ============ */
.dl-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.dl-card-main{
  background:var(--card);border-radius:var(--radius);padding:32px 32px;
  display:flex;flex-direction:column;gap:13px;
  transition:background .3s var(--ease-out),box-shadow .3s,transform .3s;
}
.dl-card-main:hover{background:#fff;box-shadow:0 20px 50px rgba(0,0,0,.09);transform:translateY(-4px)}
.dcm-ic{width:56px;height:56px;border-radius:15px;background:#fff;display:flex;align-items:center;justify-content:center;box-shadow:0 2px 10px rgba(0,0,0,.05)}
.dl-card-main h3{font-size:21px;font-weight:600;letter-spacing:-.02em}
.dl-card-main p{font-size:14.5px;color:var(--ink-2);line-height:1.6}
.dcm-btn{margin-top:auto;align-self:flex-start;padding:12px 24px;border-radius:var(--radius-pill);background:var(--ink);color:#fff;font-size:14px;font-weight:600;transition:background .2s}
.dl-card-main:hover .dcm-btn{background:var(--teal)}
.dl-extra{margin-top:34px;background:var(--card);border-radius:var(--radius-sm);padding:24px 28px}
.dl-extra h4{font-size:14px;font-weight:600;color:var(--ink);margin-bottom:13px}
.de-links{display:flex;gap:26px;flex-wrap:wrap}
.de-links a{font-size:14px;color:var(--teal);font-weight:600}
.de-links a:hover{color:var(--teal-hover);text-decoration:underline}
.use-steps{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:44px}
.us{background:var(--card);border-radius:var(--radius-sm);padding:24px}
.us-no{font-family:var(--font-display);font-size:13px;font-weight:700;color:var(--teal);margin-bottom:11px}
.us h4{font-size:16px;font-weight:600;margin-bottom:7px}
.us p{font-size:13.5px;color:var(--ink-2);line-height:1.55}
@media (max-width:680px){.dl-grid,.use-steps{grid-template-columns:1fr}}

/* ============ 移动菜单 ============ */
.menu-toggle{
  display:none;width:38px;height:38px;
  border:none;background:transparent;border-radius:10px;
  align-items:center;justify-content:center;cursor:pointer;
}
.mobile-menu{
  display:none;background:rgba(255,255,255,.9);
  backdrop-filter:blur(20px);
  border-bottom:1px solid rgba(0,0,0,.07);
}
.mobile-menu.open{display:block}
.mobile-menu a{display:block;padding:15px var(--gutter);font-size:16px;font-weight:500;color:var(--ink);letter-spacing:-.01em}
.mobile-menu a.mm-cta{color:var(--teal)}

/* ============ 滚动淡入（JS 驱动，无 JS 直接显示） ============ */
.js .rv{opacity:0;transform:translateY(28px)}
.js .rv.in{opacity:1;transform:none;transition:opacity .8s var(--ease-out),transform .8s var(--ease-out)}
.js .rv.d1{transition-delay:.07s}
.js .rv.d2{transition-delay:.14s}
.js .rv.d3{transition-delay:.21s}
.js .rv.d4{transition-delay:.28s}

/* ============ Responsive ============ */
@media (max-width:1024px){
  .nav{gap:18px}
  .nav a{font-size:12.5px}
  .hub,.features{grid-template-columns:repeat(2,1fr)}
  .phases,.mod-grid{grid-template-columns:repeat(2,1fr)}
  .contact-card{grid-template-columns:1fr}
}
@media (max-width:860px){
  .nav,.nav-cta{display:none}
  .menu-toggle{display:inline-flex}
  .site-footer .top{flex-direction:column}
  .site-footer .cols{gap:36px}
}
@media (max-width:640px){
  .section{padding:80px 0}
  .hero{padding:72px 0 56px}
  .inner-hero{padding:80px 0 72px}
  .cta-band{padding:80px 0}
  .hub,.features,.steps,.phases,.mod-grid{grid-template-columns:1fr}
  .canvas-mock{margin-top:44px;padding:14px}
  .canvas-mock .nodes{grid-template-columns:repeat(2,1fr)}
  .doc-card{flex-direction:column;align-items:flex-start}
  .contact-card{padding:32px}
}