/* ============ 设计令牌（浅蓝 · 清爽通透） ============ */
:root{
  --blue:#2F86F6; --blue-deep:#1366D6; --blue-bright:#3B9BFF;
  --sky:#5AC8FA; --sky-soft:#BFE3FF; --mint:#16C2A3;
  --ink:#15233B; --ink-soft:#566579; --ink-faint:#90A0B5;
  --bg:#F4F9FF; --bg-2:#EAF3FF; --panel:#FFFFFF; --line:#DBE9FB;
  --grad:linear-gradient(120deg,#3B9BFF 0%,#4FB0FF 55%,#5AC8FA 100%);
  --grad-soft:linear-gradient(135deg,#EAF4FF 0%,#DCEBFF 100%);
  --shadow-sm:0 2px 10px rgba(47,134,246,.08);
  --shadow:0 16px 42px rgba(45,118,228,.14);
  --shadow-lg:0 30px 72px rgba(38,108,222,.22);
  --r-sm:12px; --r:18px; --r-lg:26px; --r-xl:34px;
  --maxw:1120px;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Segoe UI",system-ui,-apple-system,sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.7;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
h1,h2,h3{line-height:1.22;letter-spacing:-.01em}
.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;gap:.5em;cursor:pointer;border:none;
  font-size:1.02rem;font-weight:700;font-family:inherit;
  padding:.82em 1.55em;border-radius:999px;
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),background .2s;white-space:nowrap;
}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 10px 26px rgba(47,134,246,.4)}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 16px 36px rgba(47,134,246,.52)}
.btn-lg{font-size:1.1rem;padding:.95em 1.9em}

/* ============ 导航（极简：logo + 开始创作） ============ */
header.nav{
  position:sticky;top:0;z-index:50;transition:all .3s var(--ease);
  backdrop-filter:saturate(150%) blur(12px);background:rgba(244,249,255,.72);
  border-bottom:1px solid transparent;
}
header.nav.scrolled{background:rgba(244,249,255,.92);border-bottom-color:var(--line);box-shadow:var(--shadow-sm)}
.nav-in{display:flex;align-items:center;justify-content:space-between;height:68px}
.logo{display:flex;align-items:center;gap:.55em;font-weight:850;font-size:1.16rem}
.logo .mark{
  width:36px;height:36px;border-radius:11px;background:var(--grad);display:grid;place-items:center;
  font-size:1.15rem;box-shadow:0 6px 16px rgba(47,134,246,.42);
}
.nav-right{display:flex;align-items:center;gap:20px}

/* ============ Hero（首屏：一句话 + 作品案例） ============ */
.hero{position:relative;overflow:hidden;padding:74px 0 88px;text-align:center}
.hero::before,.hero::after{content:"";position:absolute;border-radius:50%;filter:blur(64px);opacity:.6;z-index:0}
.hero::before{width:560px;height:560px;background:radial-gradient(circle,#BFE3FF,transparent 70%);top:-180px;right:-120px}
.hero::after{width:480px;height:480px;background:radial-gradient(circle,#CFE0FF,transparent 70%);bottom:-200px;left:-150px}
.hero-in{position:relative;z-index:1;max-width:820px;margin:0 auto}
.hero h1{font-size:clamp(2.6rem,7vw,4.4rem);font-weight:900;letter-spacing:-.02em;margin:.5em 0 0}
.hero .lede{font-size:clamp(1rem,2.2vw,1.2rem);color:var(--ink-soft);margin:.9em auto 0;white-space:nowrap}
@media(max-width:600px){ .hero .lede{white-space:normal;font-size:.96rem} }

/* ============ 揭示动画 ============ */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ============ 案例展板（真实作品：提示词 → 成品；实时缩小预览，点击全屏） ============ */
.showcase{position:relative;z-index:1;margin-top:56px;display:flex;flex-direction:column;gap:30px;text-align:left}
.panel{
  display:grid;grid-template-columns:37% 1fr;gap:30px;align-items:center;
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:28px;box-shadow:var(--shadow-sm);
}
.pp-eyebrow{display:inline-flex;align-items:center;gap:.45em;font-size:1.08rem;font-weight:850;color:#fff;background:var(--grad);padding:.5em 1.2em;border-radius:999px;box-shadow:0 8px 20px rgba(47,134,246,.32);letter-spacing:.02em}
.pp-text{font-size:1.16rem;font-weight:700;color:var(--ink);line-height:1.62;margin:.8em 0 0;padding-left:14px;border-left:3px solid var(--sky)}
.pp-flow{display:flex;align-items:center;flex-wrap:wrap;gap:.4em;margin-top:1em;color:var(--ink-faint);font-weight:700;font-size:.92rem}
.pp-flow b{color:var(--mint)}
.work-frame{
  position:relative;width:100%;aspect-ratio:16/10;overflow:hidden;cursor:pointer;
  border-radius:var(--r);border:1px solid var(--line);background:#0d1117;
  box-shadow:var(--shadow-sm);transition:transform .3s var(--ease),box-shadow .3s var(--ease);
}
.work-frame:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.work-frame:focus-visible{outline:3px solid var(--sky);outline-offset:3px}
.work-frame iframe{position:absolute;top:0;left:0;border:0;transform-origin:top left;pointer-events:none}
.work-ph{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;gap:9px;background:var(--grad-soft);color:var(--blue-deep);font-weight:700;font-size:.95rem}
.spin{width:20px;height:20px;border:3px solid var(--sky-soft);border-top-color:var(--blue);border-radius:50%;animation:spin 1s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.work-badge{
  position:absolute;right:12px;bottom:12px;z-index:3;display:inline-flex;align-items:center;gap:.4em;
  background:rgba(15,28,48,.78);color:#fff;font-size:.84rem;font-weight:700;padding:.5em 1em;border-radius:999px;
  backdrop-filter:blur(4px);pointer-events:none;transition:background .2s;
}
.work-frame:hover .work-badge{background:var(--blue)}
.work-cap{margin-top:11px;font-size:.92rem;color:var(--ink-soft)}
.work-cap b{color:var(--ink);font-weight:800}
@media(max-width:760px){
  .panel{grid-template-columns:1fr;gap:18px;padding:20px}
  .pp-text{font-size:1.05rem}
}

/* 全屏浮层（点击作品 → 原尺寸可交互） */
.lightbox{position:fixed;inset:0;z-index:200;background:rgba(9,18,32,.86);backdrop-filter:blur(5px);display:flex;flex-direction:column}
.lightbox[hidden]{display:none}
.lb-bar{display:flex;align-items:center;gap:12px;padding:11px 16px;color:#fff;flex:none}
.lb-title{font-weight:800;font-size:1rem;display:flex;align-items:center;gap:.5em;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.lb-actions{margin-left:auto;display:flex;align-items:center;gap:10px;flex:none}
.lb-open{color:#fff;font-weight:700;font-size:.9rem;background:rgba(255,255,255,.16);padding:.5em 1.1em;border-radius:999px;transition:background .2s}
.lb-open:hover{background:rgba(255,255,255,.3)}
.lb-close{width:40px;height:40px;border-radius:50%;border:none;background:rgba(255,255,255,.16);color:#fff;font-size:1.3rem;cursor:pointer;transition:background .2s}
.lb-close:hover{background:rgba(255,255,255,.3)}
.lb-frame{flex:1;width:100%;border:0;background:#fff}
.lb-img{flex:1;min-height:0;width:100%;object-fit:contain;background:#fff;padding:14px}
.lb-video{flex:1;min-height:0;width:100%;object-fit:contain;background:#000}

/* 图片类案例（桌面程序截图等）：截图 contain 居中，浅蓝渐变垫底 */
.work-frame.is-img{background:var(--grad-soft)}
.work-img,.work-video{position:absolute;inset:0;width:100%;height:100%;object-fit:contain}

/* ============ 末尾 CTA ============ */
.final{padding:30px 0 96px;text-align:center}
.final-box{background:var(--grad);color:#fff;border-radius:var(--r-xl);padding:62px 40px;box-shadow:var(--shadow-lg);position:relative;overflow:hidden}
.final-box::after{content:"";position:absolute;width:340px;height:340px;border-radius:50%;background:rgba(255,255,255,.14);top:-120px;right:-80px}
.final-box h2{font-size:clamp(1.8rem,5vw,2.8rem);font-weight:900;margin-bottom:.6em;position:relative;z-index:1}
.final-box .btn-primary{background:#fff;color:var(--blue-deep);box-shadow:0 14px 34px rgba(0,40,90,.28);position:relative;z-index:1}
.final-box .btn-primary:hover{box-shadow:0 20px 44px rgba(0,40,90,.36)}

/* ============ 极简页脚 ============ */
footer.ft{background:#0F1C30;color:#C7D4E6;padding:46px 0 28px}
.ft-top{display:flex;justify-content:space-between;align-items:flex-start;gap:30px;flex-wrap:wrap;margin-bottom:30px}
.ft .logo{color:#fff}
.ft .desc{color:#92A0B8;margin-top:12px;font-size:.94rem;max-width:34ch}
.socials{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px}
.social{position:relative;display:inline-flex;align-items:center;gap:.5em;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.14);padding:.42em 1em;border-radius:999px;font-weight:600;font-size:.86rem;color:#C7D4E6;cursor:pointer;transition:background .2s}
.social:hover{background:rgba(255,255,255,.16)}
.social-logo{width:18px;height:18px;border-radius:5px;object-fit:cover;flex:none}
.qr-pop{position:absolute;left:50%;bottom:calc(100% + 12px);transform:translateX(-50%) translateY(6px);opacity:0;visibility:hidden;transition:opacity .22s var(--ease),transform .22s var(--ease);background:#fff;border-radius:12px;padding:10px;box-shadow:0 18px 44px rgba(0,0,0,.45);z-index:60;pointer-events:none}
.qr-pop::after{content:"";position:absolute;top:100%;left:50%;transform:translateX(-50%);border:7px solid transparent;border-top-color:#fff}
.qr-pop img{display:block;width:168px;height:auto;border-radius:6px}
.qr-pop .cap{display:block;text-align:center;font-size:.76rem;color:#15233B;margin-top:7px;font-weight:700}
.social:hover .qr-pop,.social:focus-within .qr-pop{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.ft-links{display:flex;gap:40px;flex-wrap:wrap}
.ft-links h5{font-size:.82rem;letter-spacing:.08em;color:#7E8DA6;text-transform:uppercase;margin-bottom:13px;font-weight:800}
.ft-links ul{list-style:none;display:flex;flex-direction:column;gap:9px}
.ft-links a{color:#B3C0D4;font-size:.93rem;transition:color .2s}
.ft-links a:hover{color:var(--sky)}
.ft-bot{border-top:1px solid #20304A;padding-top:20px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;color:#7E8DA6;font-size:.84rem}
.ft-bot a{color:#7E8DA6}.ft-bot a:hover{color:var(--sky)}

@media(max-width:520px){ .final-box{padding:44px 24px} }
@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}