/* ============================================================
   陆野 LUYE — 造物匠人 · 样式表（白底高级感 · 动效版）
   视觉规则来源：landing-page-design（B 系列）、amicro 微交互、
   dimensional-drawing 线条描绘、threeui 高级感语言
   ============================================================ */

/* ---------- 设计变量 ---------- */
:root{
  --paper:#ffffff;
  --ink:#1d1d1f;        /* Apple 正文黑 */
  --muted:#86868b;      /* Apple 辅助灰 */
  --line:#d2d2d7;       /* Apple 发丝线 */
  --accent:#0071e3;     /* Apple 链接蓝 */
  --gap:clamp(24px,5vw,80px);
  --header-h:96px;              /* 浮动头部占位的垂直空间 */
  --section-gap:clamp(110px,13vw,200px);
  --ease:cubic-bezier(0.22,1,0.36,1);   /* B7 基准曲线：有重量感、减速到位 */
}

/* ---------- 基础 ---------- */
*{box-sizing:border-box}
html{
  scroll-behavior:smooth;
  scroll-padding-top:calc(var(--header-h) + 16px);
}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none;text-underline-offset:.2em}
img{display:block;width:100%;height:100%;object-fit:cover}
h1,h2,h3{text-wrap:balance}       /* 标题不出现孤字 */
p{text-wrap:pretty}
::selection{background:#d3e4fb;color:#1d1d1f}
:focus-visible{outline:2px solid var(--accent);outline-offset:5px}
.wrap{width:min(100% - 2 * var(--gap),1440px);margin:auto}

/* ---------- 无障碍跳转链接 ---------- */
.skip{position:absolute;top:-100px;z-index:40;background:#fff;padding:12px}
.skip:focus{top:0}

/* ---------- 浮动胶囊头部（B7 导航规则） ---------- */
.header{
  position:fixed;
  top:14px;
  left:50%;
  translate:-50% 0;
  z-index:30;
  height:56px;
  width:min(100% - 2 * clamp(16px,4vw,48px),1440px);
  padding:0 24px;
  display:flex;
  justify-content:space-between;
  align-items:center;
  border:1px solid rgba(210,210,215,.6);
  border-radius:999px;
  background:rgba(255,255,255,.7);
  -webkit-backdrop-filter:blur(20px) saturate(1.8);
  backdrop-filter:blur(20px) saturate(1.8);
  box-shadow:0 1px 2px rgba(0,0,0,.03),0 8px 28px rgba(0,0,0,.05);
  transition:box-shadow .5s var(--ease);
}
.header.scrolled{box-shadow:0 2px 6px rgba(0,0,0,.05),0 12px 40px rgba(0,0,0,.09)}
.brand{display:flex;gap:12px;align-items:center;font-weight:650;font-size:15px;letter-spacing:.08em}
.brand small{display:block;font-size:9px;letter-spacing:.13em;margin-top:5px;color:var(--muted)}
.mark{display:inline-flex;width:34px;height:34px;color:var(--ink)}
.mark svg{display:block;width:100%;height:100%}
nav{display:flex;gap:clamp(20px,3vw,48px);font-size:13px}
nav a{min-height:44px;display:inline-flex;align-items:center;transition:color .3s,transform .3s var(--ease)}
nav a:active{transform:scale(.97)}
nav a:hover,.text-link:hover{color:var(--accent)}

/* ---------- 首屏 ---------- */
.hero{
  display:grid;
  grid-template-columns:1fr 1.05fr;
  gap:5%;
  padding-top:clamp(150px,20vh,200px);
  min-height:min(840px,100svh);
}
.hero-copy{align-self:center;padding-bottom:70px}
.eyebrow,.index{font-size:11px;letter-spacing:.14em;color:var(--accent);font-weight:600}
/* Apple 风：标题纯黑实色，第二行用品牌蓝点睛 */
.hero h1{
  font-size:clamp(48px,6.5vw,100px);
  line-height:1.12;
  letter-spacing:-.06em;
  font-weight:600;
  margin:30px 0;
  color:var(--ink);
}
.hero h1 span{color:var(--accent)}
.hero-description{font-size:16px;line-height:1.9;color:var(--muted);max-width:29em}
/* Apple 式文字链：蓝色 + chevron，悬停下划线 */
.text-link{display:inline-flex;gap:8px;align-items:center;border-bottom:none;padding:12px 0;font-size:15px;font-weight:500;color:var(--accent);margin-top:28px;min-height:44px;transition:color .3s}
.text-link span{font-size:19px;line-height:1;transition:transform .4s var(--ease)}
.text-link:hover{color:#0077ed;text-decoration:underline}
.text-link:hover span{transform:translateX(4px);text-decoration:none}
.secondary-link{color:var(--muted)}
.secondary-link:hover{color:var(--ink)}
.secondary-link{margin-left:24px}
.hero-image{margin:0;align-self:stretch;min-height:440px;position:relative;overflow:hidden;background:#111512;border-radius:28px}
.hero-image img{object-position:center}
/* 图注底部压暗，保证白字在任何图片上可读 */
.hero-image::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:32%;
  background:linear-gradient(to top,rgba(12,16,14,.5),transparent);
  pointer-events:none;
}
.hero-image figcaption{position:absolute;bottom:22px;left:24px;right:24px;z-index:1;display:flex;justify-content:space-between;color:#fff;font-size:11px;letter-spacing:.06em}
.hero-bottom{grid-column:1/-1;display:flex;justify-content:space-between;padding:28px 0;border-bottom:1px solid var(--line);font-size:11px;color:var(--muted)}

/* ---------- 精选作品 ---------- */
.section{padding-top:var(--section-gap)}
.section-intro{max-width:660px;margin-bottom:65px}
.section h2,.practice h2,.about h2,.toolkit h2,.connect h2{
  font-size:clamp(40px,5vw,72px);
  line-height:1.22;
  letter-spacing:-.05em;
  font-weight:550;
  margin:24px 0;
}
.section-intro>p:last-child,.practice-intro{color:var(--muted);line-height:1.9;max-width:420px}
.feature{display:grid;grid-template-columns:1.35fr .65fr;gap:clamp(30px,6vw,100px);align-items:center}
.feature-img{aspect-ratio:1.45;overflow:hidden;background:#f5f5f7;border-radius:20px;transition:transform .5s var(--ease),box-shadow .5s var(--ease)}
.feature-copy h3{font-size:clamp(36px,4vw,58px);line-height:1.2;letter-spacing:-.04em;font-weight:550;margin:25px 0}
.feature-copy p,.work-info p,.about-copy p{color:var(--muted);line-height:1.95;font-size:15px}
/* 底部 padding 补偿偶数项 90px 交错位移 */
.work-grid{display:grid;grid-template-columns:1fr 1fr;gap:110px 32px;margin-top:130px;padding-bottom:90px}
.work-item:nth-child(even){transform:translateY(90px)}
.work-image{aspect-ratio:1.35;overflow:hidden;background:#f5f5f7;border-radius:20px;transition:transform .5s var(--ease),box-shadow .5s var(--ease)}
.work-image img,.feature-img img{transition:transform .7s var(--ease)}
/* 悬浮微交互：卡片上浮 + 柔和投影 + 图内缩放 */
.work-item:hover .work-image,.feature:hover .feature-img{transform:translateY(-6px);box-shadow:0 24px 48px -16px rgba(0,0,0,.14)}
.work-item:hover img,.feature:hover img{transform:scale(1.03)}
.work-info{display:flex;justify-content:space-between;gap:30px;margin-top:24px}
.work-info h3{font-weight:550;font-size:26px;margin:10px 0}
.work-info p{max-width:235px;margin:0;font-size:13px}

/* ---------- 产品实践 ---------- */
.practice{margin-top:150px;padding-top:100px;border-top:1px solid var(--line);display:grid;grid-template-columns:1fr 1fr;gap:8%}
.project-list>div{display:grid;grid-template-columns:110px 1fr auto;align-items:center;gap:16px;border-bottom:1px solid var(--line);padding:24px 0;transition:padding-left .4s var(--ease)}
.project-list>div:hover{padding-left:10px}
.project-list span{font-size:10px;color:var(--accent);letter-spacing:.1em}
.project-list h3{font-weight:500;font-size:clamp(18px,2vw,26px);margin:0}
.project-list p{font-size:12px;color:var(--muted);margin:0}

/* ---------- 造物 KIT ---------- */
.toolkit{padding:150px 0;border-top:1px solid var(--line);display:grid;grid-template-columns:1fr 1fr;gap:8%}
.toolkit-intro>p:last-child,.toolkit-content p,.connect p{color:var(--muted);line-height:1.9;font-size:15px}
.toolkit-content article{border-bottom:1px solid var(--line);padding:26px 0}
.toolkit-content h3{font-size:25px;font-weight:550;margin:12px 0}
.toolkit-content p{margin:0}
.toolkit-content .text-link{margin-top:10px}

/* ---------- 关于 ---------- */
.about{display:grid;grid-template-columns:1fr 1fr;gap:12%;padding:180px 0}
.about-copy{padding-top:30px;max-width:550px}
.about-copy .lead{color:var(--ink);font-size:clamp(22px,2.5vw,34px);line-height:1.6}

/* ---------- 联系与分享 ---------- */
.connect{border-top:1px solid var(--line);padding:100px 0 130px;display:grid;grid-template-columns:1fr 1fr;gap:8%;align-items:end}
.contact-links{display:flex;flex-direction:column;align-items:flex-start;gap:14px;margin-top:30px;font-size:14px}
.contact-links a{border-bottom:1px solid var(--line);padding-bottom:5px;min-height:44px;display:inline-flex;align-items:center;transition:color .3s}
.contact-links a:hover{color:var(--accent)}
.qr-group{display:flex;gap:24px;justify-content:flex-end}
.qr-group figure{width:min(190px,45%);margin:0}
.qr-group img{width:100%;height:auto;aspect-ratio:1;object-fit:contain;background:#fff;border:1px solid var(--line);border-radius:12px}
.qr-group figcaption{margin-top:12px;font-size:12px;color:var(--muted)}

/* ---------- 页脚 ---------- */
.footer{border-top:1px solid var(--line);padding:70px 0 35px}
.footer-title{font-size:clamp(28px,4vw,54px);line-height:1.4;letter-spacing:-.04em}
.footer-meta{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-top:90px;font-size:12px;color:var(--muted)}

/* ============================================================
   动效（仅在 JS 可用时启用，无 JS 时页面完整可读）
   ============================================================ */

/* 入场：头部下落、文案行上浮、图片揭幕、品牌描边 */
.js .header{opacity:0;translate:-50% -10px;animation:hdr-in .8s var(--ease) .05s forwards}
@keyframes hdr-in{to{opacity:1;translate:-50% 0}}
.js .hero-copy>*{opacity:0;transform:translateY(28px);animation:rise-in .9s var(--ease) forwards}
.js .hero-copy>*:nth-child(1){animation-delay:.12s}
.js .hero-copy>*:nth-child(2){animation-delay:.22s}
.js .hero-copy>*:nth-child(3){animation-delay:.34s}
.js .hero-copy>*:nth-child(4){animation-delay:.46s}
@keyframes rise-in{to{opacity:1;transform:none}}
.js .hero-image{clip-path:inset(0 0 100% 0);animation:img-reveal 1.1s var(--ease) .25s forwards}
@keyframes img-reveal{to{clip-path:inset(0 0 0 0)}}
.js .hero-image img{transform:scale(1.06);animation:img-settle 1.8s var(--ease) .25s forwards}
@keyframes img-settle{to{transform:scale(1)}}
.js .hero-bottom{opacity:0;animation:fade-in .8s var(--ease) .7s forwards}
@keyframes fade-in{to{opacity:1}}
/* dimensional-drawing 线条描绘：外框先画出来，字随后淡入 */
.js .mark rect{stroke-dasharray:1;stroke-dashoffset:1;animation:draw-stroke 1s var(--ease) .1s forwards}
@keyframes draw-stroke{to{stroke-dashoffset:0}}
.js .mark text{opacity:0;animation:fade-in .6s var(--ease) .8s forwards}

/* 滚动揭示：进入视口上升 32px 淡入，只播一次 */
.reveal{opacity:0;transform:translateY(32px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* B11 页脚标语逐字点亮：暗哑 → 全色，按阅读顺序 */
.footer-title span{opacity:.22;transition:opacity .55s var(--ease)}
.footer-title.lit span{opacity:1}

/* ============================================================
   响应式
   ============================================================ */
@media(max-width:750px){
  :root{--header-h:84px;--section-gap:100px}
  .header{top:12px;height:56px;width:calc(100% - 24px);padding:0 18px}
  .mark{width:30px;height:30px}
  /* 移动端只保留核心导航 */
  nav{gap:18px;font-size:12px}
  nav a[href="#practice"],nav a[href="#toolkit"]{display:none}
  .hero{display:flex;flex-direction:column;min-height:0;padding-top:130px}
  .hero-copy{padding-bottom:42px}
  .hero h1{font-size:clamp(48px,12vw,70px);margin:25px 0}
  .hero-image{min-height:0;aspect-ratio:1.1}
  .hero-bottom{margin-top:16px}
  .feature,.practice,.about,.toolkit,.connect{grid-template-columns:1fr}
  .feature{gap:30px}
  .work-grid{grid-template-columns:1fr;gap:55px;margin-top:80px;padding-bottom:0}
  .work-item:nth-child(even){transform:none}
  .work-info{gap:20px}
  .work-info p{max-width:45%}
  .practice{margin-top:110px;padding-top:70px;gap:35px}
  .project-list>div{grid-template-columns:75px 1fr}
  .project-list p{grid-column:2}
  .toolkit,.connect{gap:35px;padding:90px 0}
  .qr-group{justify-content:flex-start}
  .about{padding:110px 0;gap:15px}
  .secondary-link{margin-left:15px}
  .footer-meta{margin-top:60px}
}

@media(max-width:360px){
  .brand{font-size:13px}
  .brand small{font-size:8px}
  nav{gap:12px}
  .hero-description{font-size:15px}
}

/* ---------- 减弱动效偏好：全部动画降级为直接可见 ---------- */
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*:before,*:after{animation:none!important;transition:none!important}
  .js .header,.js .hero-copy>*,.js .hero-bottom{opacity:1!important;translate:-50% 0}
  .js .hero-copy>*{transform:none!important}
  .js .hero-image{clip-path:none!important}
  .js .hero-image img{transform:none!important}
  .js .mark rect{stroke-dashoffset:0!important}
  .js .mark text{opacity:1!important}
  .reveal,.footer-title span{opacity:1!important;transform:none!important}
}