/* ============================================================
   裕铭信息官网 v2 — Apple 风格设计体系
   纯白 #ffffff · 浅灰 #f5f5f7 · 纯黑 #000 · 面板黑 #161617
   正文 #1d1d1f · 次级 #86868b · 链接蓝 #0066cc · 按钮蓝 #0071e3
   光渐变 #2997ff → #a972ff（仅用于关键字与数字）
   ============================================================ */
:root{
  --white:#fff; --gray:#f5f5f7; --black:#000; --panel:#161617;
  --ink:#1d1d1f; --ink2:#86868b; --ink2-dark:#a1a1a6;
  --link:#0066cc; --btn:#0071e3;
  --ga:#2997ff; --gb:#a972ff;
  --r:28px;
  --font:'Inter Variable','Noto Sans SC Variable',-apple-system,'PingFang SC','Microsoft YaHei',sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font);color:var(--ink);background:var(--white);font-synthesis:none;font-optical-sizing:auto;
  font-size:17px;line-height:1.5;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
::selection{background:#b3d7ff}

/* ---------- 文字体系 ---------- */
.t-hero{font-size:clamp(44px,6.8vw,86px);line-height:1.1;font-weight:600;letter-spacing:-.008em}
.t-xl{font-size:clamp(34px,4.8vw,60px);line-height:1.14;font-weight:600;letter-spacing:-.008em}
.t-lg{font-size:clamp(26px,3.2vw,40px);line-height:1.2;font-weight:600;letter-spacing:-.006em}
.t-sub{font-size:clamp(18px,2vw,25px);line-height:1.35;font-weight:400;color:var(--ink2)}
.on-dark .t-sub{color:var(--ink2-dark)}
.grad{background:linear-gradient(94deg,var(--ga),var(--gb));-webkit-background-clip:text;background-clip:text;color:transparent}

/* 苹果式文字链接 */
.tlink{color:var(--link);font-size:19px;white-space:nowrap}
.tlink::after{content:" ›";font-weight:400}
.tlink:hover{text-decoration:underline}
.on-dark .tlink{color:#2997ff}
.link-row{display:flex;gap:36px;justify-content:center;flex-wrap:wrap;margin-top:18px}

/* 按钮 */
.btn{display:inline-block;background:var(--btn);color:#fff;border:0;cursor:pointer;font-family:inherit;
  font-size:17px;padding:12px 24px;border-radius:980px;transition:background .2s}
.btn:hover{background:#0077ed}
.btn.big{font-size:19px;padding:15px 30px}
.btn.quiet{background:transparent;color:var(--link);border:1px solid var(--link)}
.btn.quiet:hover{background:rgba(0,102,204,.08)}

/* ---------- 导航（全站统一深色半透明，Apple 式） ---------- */
.nav{position:sticky;top:0;z-index:90;background:rgba(22,22,23,.8);
  backdrop-filter:saturate(180%) blur(20px);-webkit-backdrop-filter:saturate(180%) blur(20px);color:#f5f5f7}
.nav-inner{max-width:1024px;margin:0 auto;padding:0 22px;height:48px;display:flex;align-items:center;gap:8px}
.brand{font-size:15px;font-weight:500;letter-spacing:.01em;display:flex;align-items:center;gap:8px;white-space:nowrap;opacity:.92}
.brand:hover{opacity:1}
.brand .dot{width:8px;height:8px;border-radius:50%;background:linear-gradient(135deg,var(--ga),var(--gb));
  box-shadow:0 0 8px rgba(41,151,255,.9)}
.nav-links{display:flex;gap:30px;margin-left:auto;align-items:center}
.nav-links a{font-size:12.5px;opacity:.8;transition:opacity .2s;letter-spacing:.01em}
.nav-links a:hover,.nav-links a.active{opacity:1}
.nav-toggle{display:none;margin-left:auto;background:none;border:0;cursor:pointer;padding:10px;color:inherit}
.nav-toggle span{display:block;width:17px;height:1.5px;background:currentColor;margin:4px 0;border-radius:2px;transition:.25s}

/* ---------- 通用面板分区 ---------- */
.panel{padding:130px 24px;text-align:center}
.panel.tight{padding:96px 24px}
.panel.on-gray{background:var(--gray)}
.panel.on-dark{background:var(--black);color:#f5f5f7}
.panel.on-panel{background:var(--panel);color:#f5f5f7}
.measure{max-width:820px;margin:0 auto}
.measure-wide{max-width:1200px;margin:0 auto}
.panel .t-xl + .t-sub,.panel .t-hero + .t-sub{margin-top:22px}
.eyebrow{font-size:15px;font-weight:600;letter-spacing:.02em;color:var(--ink2);margin-bottom:14px}
.on-dark .eyebrow{color:var(--ink2-dark)}

/* 滚动浮现 */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .8s cubic-bezier(.25,.1,.25,1),transform .8s cubic-bezier(.25,.1,.25,1)}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1!important;transform:none!important;transition:none!important}
  .lightline{animation:none!important}
  html{scroll-behavior:auto}
}

/* ---------- 首屏 ---------- */
.hero{position:relative;background:var(--black);color:#f5f5f7;overflow:hidden;
  padding:150px 24px 110px;text-align:center;isolation:isolate}
.hero::before{content:"";position:absolute;inset:0;z-index:-1;
  background:
    radial-gradient(52% 44% at 50% 118%,rgba(41,120,255,.34),transparent 72%),
    radial-gradient(30% 26% at 14% 12%,rgba(169,114,255,.10),transparent 70%),
    radial-gradient(26% 22% at 88% 10%,rgba(41,151,255,.09),transparent 70%)}
.hero-img{position:absolute;inset:0;z-index:-2;background-size:cover;background-position:center bottom;opacity:.3}
.hero .eyebrow{color:#86868b;letter-spacing:.22em;font-size:13px;text-transform:uppercase}
.hero p.lede{font-size:clamp(19px,2.2vw,27px);color:#a1a1a6;max-width:620px;margin:26px auto 0;line-height:1.4}
.hero .link-row{margin-top:34px}
.hero .tlink{font-size:21px;color:#2997ff}
/* 署名元素：贯穿首屏底部的一束流光 */
.lightline{position:absolute;left:0;right:0;bottom:0;height:1.5px;
  background:linear-gradient(90deg,transparent,var(--ga),var(--gb),transparent);
  background-size:55% 100%;background-repeat:no-repeat;background-position:-60% 0;
  animation:sweep 6s cubic-bezier(.45,0,.2,1) infinite;
  box-shadow:0 0 26px rgba(80,140,255,.6)}
@keyframes sweep{to{background-position:165% 0}}

/* ---------- 数据带（黑面板内，渐变大数字） ---------- */
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;max-width:960px;margin:0 auto}
.stats .num{font-size:clamp(44px,5.4vw,72px);font-weight:600;letter-spacing:-.015em;line-height:1}
.stats .num em{font-style:normal;font-size:.42em;font-weight:600;margin-left:3px;-webkit-text-fill-color:#86868b}
.stats .lbl{font-size:15px;color:#86868b;margin-top:12px}

/* ---------- 特写面板（平台产品） ---------- */
.feature-visual{margin:64px auto 0;max-width:1100px;border-radius:var(--r);overflow:hidden;
  background:linear-gradient(160deg,#0c1220,#101b36 55%,#0b1a3f);position:relative;min-height:420px;
  box-shadow:0 30px 80px rgba(20,40,110,.25)}
.feature-visual .gridlines{position:absolute;inset:0;opacity:.5;
  background-image:linear-gradient(rgba(120,160,255,.07) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(120,160,255,.07) 1px,transparent 1px);
  background-size:44px 44px}
.feature-visual img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.feature-visual .glowspots i{position:absolute;width:7px;height:7px;border-radius:50%;
  background:#4ba0ff;box-shadow:0 0 14px 3px rgba(75,160,255,.75)}
.feature-visual .cap{position:absolute;left:0;right:0;bottom:26px;color:#7f8ba5;font-size:13px;letter-spacing:.14em}

/* ---------- 产品卡网格（apple.com 首页式圆角大卡） ---------- */
.cardgrid{display:grid;grid-template-columns:1fr 1fr;gap:18px;max-width:1200px;margin:72px auto 0;text-align:center}
.acard{border-radius:var(--r);background:var(--white);padding:56px 40px 0;overflow:hidden;
  display:flex;flex-direction:column;align-items:center;min-height:420px;position:relative;
  transition:transform .35s cubic-bezier(.25,.1,.25,1)}
.on-gray .acard{background:var(--white)}
.acard:hover{transform:scale(1.012)}
.acard.dark{background:var(--panel);color:#f5f5f7}
.acard .cat{font-size:13px;font-weight:600;letter-spacing:.14em;color:var(--ink2);text-transform:uppercase;margin-bottom:10px}
.acard.dark .cat{color:var(--ink2-dark)}
.acard h3{font-size:clamp(23px,2.5vw,30px);font-weight:600;letter-spacing:-.006em;line-height:1.22}
.acard .desc{font-size:16px;color:var(--ink2);margin-top:10px;max-width:420px}
.acard.dark .desc{color:var(--ink2-dark)}
.acard .link-row{margin-top:16px;margin-bottom:8px}
.acard .tlink{font-size:17px}
.acard .pic{margin-top:auto;padding-top:30px;width:min(78%,360px)}
.acard .pic img{margin:0 auto;max-height:210px;object-fit:contain}
.acard .pic.ghost{height:150px;width:70%;border-radius:18px 18px 0 0;
  background:linear-gradient(180deg,rgba(41,151,255,.16),rgba(169,114,255,.05));}
.acard.dark .pic.ghost{background:linear-gradient(180deg,rgba(41,151,255,.22),rgba(169,114,255,.06))}

/* ---------- 案例：横向滑动画廊（黑面板） ---------- */
.gallery-wrap{margin-top:64px}
.gallery{display:flex;gap:20px;overflow-x:auto;scroll-snap-type:x mandatory;
  padding:6px max(24px,calc((100vw - 1200px)/2)) 26px;scrollbar-width:none}
.gallery::-webkit-scrollbar{display:none}
.gcard{flex:0 0 min(78vw,520px);scroll-snap-align:center;border-radius:var(--r);overflow:hidden;
  position:relative;aspect-ratio:4/5;max-height:560px;background:linear-gradient(180deg,#182033,#0c1017);
  color:#fff;display:flex;align-items:flex-end;isolation:isolate;text-align:left}
.gcard img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:-2;
  transition:transform 1s cubic-bezier(.25,.1,.25,1)}
.gcard:hover img{transform:scale(1.05)}
.gcard::after{content:"";position:absolute;inset:0;z-index:-1;
  background:linear-gradient(180deg,rgba(5,8,15,0) 45%,rgba(5,8,15,.82))}
.gcard .body{padding:30px 30px 32px}
.gcard .loc{font-size:12px;letter-spacing:.22em;color:#9fb0d6;margin-bottom:8px;text-transform:uppercase}
.gcard h3{font-size:25px;font-weight:600;letter-spacing:-.006em}
.gcard p{font-size:15px;color:#c8d0e2;margin-top:6px}
.gallery-nav{display:flex;gap:12px;justify-content:flex-end;max-width:1200px;margin:18px auto 0;padding:0 24px}
.gallery-nav button{width:38px;height:38px;border-radius:50%;border:0;cursor:pointer;
  background:rgba(255,255,255,.14);color:#f5f5f7;font-size:18px;line-height:1;transition:background .2s}
.gallery-nav button:hover{background:rgba(255,255,255,.26)}

/* ---------- 新闻（极简列表） ---------- */
.newslist{max-width:820px;margin:56px auto 0;text-align:left}
.newsrow{display:flex;gap:28px;align-items:baseline;padding:26px 6px;border-top:1px solid #d8d8dc;transition:opacity .2s}
.newsrow:last-of-type{border-bottom:1px solid #d8d8dc}
.newsrow:hover h3{color:var(--link)}
.newsrow time{flex:0 0 108px;font-size:14px;color:var(--ink2);font-variant-numeric:tabular-nums}
.newsrow h3{font-size:20px;font-weight:500;letter-spacing:-.01em;line-height:1.35;transition:color .2s}
.newsrow p{font-size:15px;color:var(--ink2);margin-top:4px}

/* ---------- 页面头（子页面统一） ---------- */
.page-head{padding:110px 24px 26px;text-align:center}
.page-head .eyebrow{margin-bottom:10px}
.page-head h1{font-size:clamp(38px,5.4vw,68px);font-weight:600;letter-spacing:-.008em;line-height:1.12}
.page-head .t-sub{margin-top:18px;max-width:680px;margin-left:auto;margin-right:auto}

/* ---------- 下载中心 ---------- */
.dl-filter{display:flex;gap:10px;flex-wrap:wrap;justify-content:center;margin:44px 0 34px}
.dl-filter button{border:0;background:var(--gray);border-radius:980px;
  padding:8px 20px;font-size:14px;cursor:pointer;font-family:inherit;color:var(--ink);transition:.2s}
.dl-filter button.active{background:var(--ink);color:#fff}
.dl-list{max-width:880px;margin:0 auto;text-align:left}
.dl-row{display:flex;align-items:center;gap:18px;background:var(--gray);
  border-radius:18px;padding:20px 24px;margin-bottom:12px}
.dl-ico{width:44px;height:44px;flex:none;border-radius:12px;background:#fff;
  display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:700;color:var(--link)}
.dl-main{flex:1;min-width:0}
.dl-main h3{font-size:16.5px;font-weight:600;letter-spacing:-.01em}
.dl-main p{font-size:13.5px;color:var(--ink2);margin-top:2px}
.dl-meta{font-size:12.5px;color:var(--ink2);white-space:nowrap;font-variant-numeric:tabular-nums}
.badge{display:inline-block;font-size:11.5px;padding:2.5px 10px;border-radius:980px;margin-left:8px;vertical-align:1px;font-weight:500}
.badge.pub{background:#dff5e7;color:#0f7b3d}
.badge.reg{background:#e2edff;color:#1d5fd6}
.badge.appr{background:#feeed6;color:#a86400}
.btn-sm{padding:8px 18px;font-size:14px;border-radius:980px;border:0;cursor:pointer;font-family:inherit;font-weight:500;transition:.2s}
.btn-sm.blue{background:var(--btn);color:#fff}
.btn-sm.blue:hover{background:#0077ed}
.btn-sm.gray{background:#e8e8ed;color:var(--ink2);cursor:default}
.btn-sm.line{background:#fff;border:1px solid #d2d2d7;color:var(--ink)}
.btn-sm.line:hover{border-color:var(--ink2)}
.notice{max-width:880px;margin:28px auto 0;padding:13px 20px;border-radius:14px;
  background:#e2edff;color:#1d5fd6;font-size:14.5px;text-align:left}
dialog{border:0;border-radius:22px;padding:30px;max-width:410px;width:92%;box-shadow:0 30px 90px rgba(0,0,0,.3)}
dialog::backdrop{background:rgba(0,0,0,.45);backdrop-filter:blur(4px)}

/* ---------- 文章页 ---------- */
.article{max-width:720px;margin:0 auto;padding:96px 24px 110px}
.article .meta{color:var(--ink2);font-size:14px;margin-bottom:12px;letter-spacing:.06em}
.article h1{font-size:clamp(30px,4.4vw,46px);font-weight:600;letter-spacing:-.008em;line-height:1.2;margin-bottom:30px}
.article .cover{border-radius:var(--r);margin-bottom:36px}
.article .body{font-size:18px;color:#333;white-space:pre-wrap;line-height:1.85}
.article .lede{font-size:22px;color:#48484a;line-height:1.5;margin-bottom:26px}
.article .back{display:inline-block;margin-top:48px;color:var(--link);font-size:16px}
.article .actions{margin-top:44px;display:flex;gap:16px;align-items:center;flex-wrap:wrap}

/* ---------- 表单 ---------- */
.form-wrap{max-width:420px;margin:0 auto;padding:100px 24px 130px;text-align:center}
.form-wrap h1{font-size:clamp(30px,4vw,42px);font-weight:600;letter-spacing:-.008em;margin-bottom:10px}
.form-wrap .sub{color:var(--ink2);font-size:16px;margin-bottom:36px}
.form-wrap form{text-align:left}
.field{margin-bottom:14px}
.field label{display:block;font-size:13px;font-weight:600;margin-bottom:6px;color:#48484a}
.field input,.field textarea,.field select{width:100%;padding:13px 16px;font-size:16px;font-family:inherit;
  border:1px solid #d2d2d7;border-radius:12px;background:#fff;transition:border .2s,box-shadow .2s;color:var(--ink)}
.field input:focus,.field textarea:focus,.field select:focus{outline:none;border-color:var(--btn);
  box-shadow:0 0 0 4px rgba(0,113,227,.14)}
.form-err{background:#fdecec;color:#c0392b;padding:11px 16px;border-radius:12px;font-size:14px;margin-bottom:16px;text-align:left}
.form-wrap .btn{width:100%;margin-top:8px}
.form-foot{font-size:14px;color:var(--ink2);margin-top:22px}
.form-foot a{color:var(--link)}
.form-foot a:hover{text-decoration:underline}

/* ---------- 关于 / 联系 ---------- */
.prose{max-width:700px;margin:0 auto;font-size:19px;line-height:1.75;color:#333;text-align:left}
.prose h2{font-size:clamp(24px,3vw,34px);font-weight:600;margin:56px 0 16px;letter-spacing:-.006em;text-align:center}
.prose p+p{margin-top:14px}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:start;max-width:960px;margin:56px auto 0;text-align:left}
.contact-item{display:flex;gap:16px;margin-bottom:24px;font-size:17px}
.contact-item .k{color:var(--ink2);flex:none;width:48px}
.contact-item a:hover{color:var(--link)}

/* ---------- 页脚（Apple 式浅灰小字） ---------- */
footer{background:var(--gray);color:var(--ink2);font-size:12px;line-height:1.6}
.footer-inner{max-width:1024px;margin:0 auto;padding:40px 24px 44px}
.footer-note{padding-bottom:16px;border-bottom:1px solid #d2d2d7;color:var(--ink2)}
.footer-cols{display:grid;grid-template-columns:repeat(3,1fr);gap:32px;padding:24px 0}
.footer-cols h4{color:var(--ink);font-size:12px;font-weight:600;margin-bottom:10px}
.footer-cols a,.footer-cols span{display:block;margin-bottom:8px;color:#424245}
.footer-cols a:hover{text-decoration:underline}
.footer-meta{display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  border-top:1px solid #d2d2d7;padding-top:18px;color:var(--ink2)}
.footer-meta a{color:inherit}
.footer-meta a:hover{text-decoration:underline}

/* ---------- 后台 ---------- */
.admin{display:flex;min-height:100vh;background:var(--gray)}
.admin-side{width:216px;flex:none;background:var(--panel);color:#c7cede;padding:24px 14px}
.admin-side .brand{color:#fff;padding:0 12px 20px;font-size:15px}
.admin-side a{display:block;padding:10px 12px;border-radius:10px;font-size:14px;margin-bottom:2px}
.admin-side a:hover{background:rgba(255,255,255,.07);color:#fff}
.admin-side a.active{background:var(--btn);color:#fff}
.admin-main{flex:1;padding:32px 36px;min-width:0}
.admin-main h1{font-size:24px;letter-spacing:-.01em;margin-bottom:22px}
.admin-bar{display:flex;justify-content:space-between;align-items:center;margin-bottom:22px}
.admin-bar h1{margin:0}
.stat-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:16px;margin-bottom:8px}
.stat-card{background:#fff;border-radius:16px;padding:20px 22px;display:block}
.stat-card .n{font-size:30px;font-weight:700;letter-spacing:-.02em}
.stat-card .l{font-size:13px;color:var(--ink2);margin-top:2px}
.stat-card.warn .n{color:#d97706}
table.grid{width:100%;background:#fff;border-radius:16px;border-collapse:separate;border-spacing:0;overflow:hidden;font-size:14px}
table.grid th{background:#fafafa;text-align:left;padding:12px 16px;font-size:12.5px;color:var(--ink2);font-weight:600;border-bottom:1px solid #e8e8ed}
table.grid td{padding:12px 16px;border-bottom:1px solid #f0f0f2;vertical-align:middle}
table.grid tr:last-child td{border-bottom:0}
table.grid .muted{color:var(--ink2);font-size:13px}
.inline-form{display:inline}
.admin-form{max-width:680px;background:#fff;border-radius:16px;padding:28px;text-align:left}
.st{font-size:12px;padding:3px 10px;border-radius:980px;display:inline-block}
.st.pending{background:#feeed6;color:#a86400}
.st.approved{background:#dff5e7;color:#0f7b3d}
.st.rejected{background:#fdecec;color:#c0392b}

/* ---------- 响应式 ---------- */
@media (max-width:1000px){
  .cardgrid{grid-template-columns:1fr;max-width:640px}
}
@media (max-width:820px){
  .admin-side{display:none}
  .nav-links{display:none;position:absolute;top:48px;left:0;right:0;flex-direction:column;
    background:rgba(22,22,23,.97);backdrop-filter:blur(20px);padding:20px 28px 30px;gap:20px;align-items:flex-start}
  .nav-links a{font-size:16px}
  .nav-links.open{display:flex}
  .nav-toggle{display:block}
  .panel{padding:88px 20px}
  .panel.tight{padding:64px 20px}
  .hero{padding:104px 20px 84px}
  .stats{grid-template-columns:1fr;gap:44px}
  .contact-grid,.footer-cols{grid-template-columns:1fr}
  .newsrow{flex-direction:column;gap:6px}
  .newsrow time{flex:none}
  .dl-row{flex-wrap:wrap}
  .dl-meta{width:100%;order:3;padding-left:62px}
  .page-head{padding:76px 20px 12px}
  .acard{min-height:360px;padding:44px 26px 0}
}