/* ============================================================
   南京云海峰科技有限公司 · 官网样式
   风格：东方留白 · Oriental Editorial（杂志编辑风）
   令牌在 tokens.css，组件只用语义名
   ============================================================ */
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  font-family:var(--font-sans);
  color:var(--color-text);background:var(--color-bg);
  font-size:var(--fs-body);line-height:1.85;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  position:relative;
}

/* ============================================================
   氛围层 · 宣纸颗粒
   ============================================================ */
body::before{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:var(--grain);
  background-size:180px 180px;
  opacity:.05;mix-blend-mode:multiply;
}
main,header,footer{position:relative;z-index:1;}

img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;cursor:pointer;}
h1,h2,h3,p,li,dd,dt,span,b,small{overflow-wrap:break-word;word-break:break-word;}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 var(--space-4);}
::selection{background:var(--color-accent);color:var(--color-on-accent);}
::-webkit-scrollbar{width:10px;}
::-webkit-scrollbar-track{background:var(--color-bg-alt);}
::-webkit-scrollbar-thumb{background:#C6BDA8;border-radius:0;}
::-webkit-scrollbar-thumb:hover{background:#A89E86;}

/* ---------- 焦点环：键盘可见，鼠标不打扰 ---------- */
:focus-visible{
  outline:2px solid var(--color-accent);
  outline-offset:2px;
}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{
  outline:2px solid var(--color-accent);outline-offset:2px;border-radius:1px;
}

/* ---------- 顶部导航 ---------- */
header{
  position:sticky;top:0;z-index:100;
  background:rgba(244,240,230,.9);
  backdrop-filter:saturate(140%) blur(14px);-webkit-backdrop-filter:saturate(140%) blur(14px);
  border-bottom:1px solid var(--color-border);
}
.nav{display:flex;align-items:center;justify-content:space-between;height:84px;}
.logo{display:flex;align-items:center;gap:13px;font-family:var(--font-serif);font-weight:700;font-size:19px;letter-spacing:2px;}
.logo-mark{
  width:32px;height:32px;flex:none;background:var(--color-accent);color:var(--color-on-accent);
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-serif);font-size:17px;font-weight:700;letter-spacing:0;
  transition:transform var(--dur-base) var(--ease-out);
}
.logo:hover .logo-mark{transform:rotate(-6deg) scale(1.04);}
.logo small{
  display:block;font-family:var(--font-en);font-size:9.5px;font-weight:400;
  color:var(--color-muted);letter-spacing:2.4px;line-height:1.2;margin-top:3px;
}
.nav-links{display:flex;gap:38px;align-items:center;}
.nav-links a{
  font-size:15px;color:var(--color-text-2);position:relative;
  font-family:var(--font-serif);letter-spacing:1.5px;padding:11px 0;
  transition:color var(--dur-fast) ease-out;
}
/* 悬停：下划线从左扫过 */
.nav-links a::after{
  content:"";position:absolute;left:0;bottom:0;height:1px;width:100%;
  background:var(--color-accent);transform:scaleX(0);transform-origin:left;
  transition:transform var(--dur-base) var(--ease-out);
}
.nav-links a:hover::after,.nav-links a.active::after{transform:scaleX(1);}
.nav-links a:hover,.nav-links a.active{color:var(--color-accent);}
.nav-cta{
  padding:9px 20px;border:1px solid var(--color-text);background:transparent;color:var(--color-text)!important;
  font-size:14px;font-family:var(--font-serif);letter-spacing:1.5px;
  transition:background var(--dur-base) var(--ease-out),color var(--dur-base) var(--ease-out),
             border-color var(--dur-base) var(--ease-out);white-space:nowrap;
}
.nav-cta:hover{background:var(--color-text);color:var(--color-on-accent)!important;border-color:var(--color-text);}
.nav-toggle{display:none;background:none;border:none;font-size:24px;color:var(--color-text);cursor:pointer;
  padding:0;width:44px;height:44px;min-width:44px;line-height:44px;}

/* ---------- 按钮：背景擦除而非仅变亮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;padding:15px 34px;
  font-size:15.5px;font-family:var(--font-serif);letter-spacing:2px;
  transition:color var(--dur-base) var(--ease-out),border-color var(--dur-base) var(--ease-out),
             transform var(--dur-fast) ease-out;cursor:pointer;background:none;
  position:relative;overflow:hidden;isolation:isolate;
}
.btn::before{
  content:"";position:absolute;inset:0;z-index:-1;background:var(--color-on-accent);
  transform:scaleY(0);transform-origin:bottom;transition:transform var(--dur-base) var(--ease-out);
}
.btn-p{background:var(--color-accent);color:var(--color-on-accent);border:1px solid var(--color-accent);}
.btn-p::before{background:var(--color-accent-strong);}
.btn-p:hover::before{transform:scaleY(1);}
.btn-p:hover{color:#fff;border-color:var(--color-accent-strong);transform:translateY(-2px);}
.btn-s{background:transparent;color:var(--color-text);border:1px solid var(--color-text);}
.btn-s::before{background:var(--color-text);}
.btn-s:hover::before{transform:scaleY(1);}
.btn-s:hover{color:var(--color-on-accent);transform:translateY(-2px);}
.btn:active{transform:translateY(0) scale(.985);}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none;}
.btn:disabled::before{transform:scaleY(0);}

/* ---------- Hero ---------- */
.hero{position:relative;padding:112px 0 96px;}
.hero .wrap{position:relative;z-index:1;}
.pill{
  display:inline-flex;align-items:center;gap:10px;padding:7px 0;
  font-size:13px;letter-spacing:3px;color:var(--color-text-2);
  font-family:var(--font-serif);border-bottom:1px solid var(--color-text);
}
.pill i{width:7px;height:7px;background:var(--color-accent);display:block;flex:none;}
h1{
  font-family:var(--font-serif);font-size:var(--fs-display);line-height:1.12;
  font-weight:700;letter-spacing:4px;margin:30px -4px 0 0;max-width:12em;
  text-wrap:balance;
}
h1 .grad{color:var(--color-accent);}
.hero .sub{
  font-size:var(--fs-lead);color:var(--color-text-2);margin-top:32px;max-width:52ch;line-height:1.9;
}
.hero .en{
  font-family:var(--font-en);font-size:11px;letter-spacing:4px;color:var(--color-muted);
  margin-top:24px;text-transform:uppercase;
}
.hero-btns{display:flex;gap:16px;margin-top:44px;flex-wrap:wrap;}
.stats{
  display:grid;grid-template-columns:repeat(3,1fr);gap:0;margin-top:72px;
  border-top:1px solid var(--color-border);
}
.stat{padding:30px 28px 0 0;border-right:1px solid var(--color-border);transition:background var(--dur-base) var(--ease-out);}
.stat:last-child{border-right:none;padding-left:28px;}
.stat:nth-child(2){padding-left:28px;}
.stat b{
  display:block;font-family:var(--font-serif);font-size:clamp(34px,4.4vw,56px);
  font-weight:700;color:var(--color-accent);line-height:1;letter-spacing:1px;
  transition:letter-spacing var(--dur-base) var(--ease-out);
}
.stat:hover b{letter-spacing:4px;}
.stat b i{font-size:.5em;font-style:normal;font-weight:400;}
.stat span{display:block;font-size:var(--fs-sm);color:var(--color-muted);margin-top:12px;letter-spacing:2px;}

/* ---------- 通用区块 ---------- */
section{padding:112px 0;position:relative;}
.alt{background:var(--color-bg-alt);border-top:1px solid var(--color-border);border-bottom:1px solid var(--color-border);}
.sec-head{margin-bottom:64px;max-width:820px;}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.sec-head .bar{width:52px;height:1px;background:var(--color-accent);margin-bottom:26px;
  transform-origin:left;transition:width var(--dur-slow) var(--ease-out);}
.sec-head.center .bar{margin-left:auto;margin-right:auto;transform-origin:center;}
.sec-head:hover .bar{width:88px;}
.sec-head .num{
  display:block;font-family:var(--font-serif);font-size:14px;letter-spacing:6px;
  color:var(--color-accent-strong);margin-bottom:18px;
  transition:letter-spacing var(--dur-slow) var(--ease-out);
}
.sec-head:hover .num{letter-spacing:10px;}
.sec-head h2{
  font-family:var(--font-serif);font-size:var(--fs-h2);font-weight:700;
  letter-spacing:3px;line-height:1.25;display:flex;align-items:baseline;gap:18px;flex-wrap:wrap;
}
.sec-head h2 small{
  font-family:var(--font-en);font-size:11px;font-weight:400;letter-spacing:3px;
  color:var(--color-muted);text-transform:uppercase;
}
.sec-head p{color:var(--color-text-2);margin-top:22px;font-size:var(--fs-lead);line-height:1.85;max-width:60ch;}

/* ---------- 关于 ---------- */
.about{display:grid;grid-template-columns:1.05fr 1fr;gap:64px;align-items:start;}
.about.one{grid-template-columns:1fr;max-width:860px;margin:0 auto;}
.about p{color:var(--color-text-2);font-size:var(--fs-lead);line-height:2;}
.about p+p{margin-top:24px;}
.about p strong{color:var(--color-text);font-weight:700;border-bottom:1px solid var(--color-accent);padding-bottom:1px;}
.facts{background:transparent;border:0;border-top:1px solid var(--color-text);padding:0;}
.fact{
  display:flex;gap:20px;padding:18px 0;border-bottom:1px solid var(--color-border);
  font-size:15px;align-items:baseline;transition:padding-left var(--dur-base) var(--ease-out);
}
.fact:hover{padding-left:12px;}
.fact:last-child{border-bottom:none;}
.fact dt{color:var(--color-muted);width:132px;flex:none;letter-spacing:1px;}
.fact dd{font-weight:600;flex:1;min-width:0;overflow-wrap:anywhere;}
.same-wx{font-weight:400;color:var(--color-muted);font-size:13px;margin-left:4px;}

/* ---------- 使命 / 愿景 / 理念 ---------- */
.mv{display:grid;grid-template-columns:repeat(2,1fr);gap:56px;margin-bottom:56px;}
.mv-card{background:transparent;border:0;border-top:1px solid var(--color-text);padding:34px 0 0;position:relative;}
.mv-card::before{
  content:"";position:absolute;left:0;top:-1px;width:40px;height:2px;background:var(--color-accent);
  transition:width var(--dur-slow) var(--ease-out);
}
.mv-card:hover::before{width:100%;}
.mv-card b{
  display:block;font-family:var(--font-serif);font-size:var(--fs-h3);font-weight:700;
  color:var(--color-text);margin-bottom:18px;letter-spacing:3px;
}
.mv-card p{color:var(--color-text-2);font-size:16px;line-height:1.95;}
@media (max-width:920px){.mv{grid-template-columns:1fr;gap:40px;}}

.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;
  clip:rect(0 0 0 0);white-space:nowrap;border:0;}

/* ---------- 业务清单：朱砂线擦过 ---------- */
.svcs{display:grid;grid-template-columns:repeat(3,1fr);gap:0 48px;}
.svcs-4{grid-template-columns:repeat(4,1fr);}
.svc{
  background:transparent;border:0;border-top:1px solid var(--color-border);border-bottom:1px solid var(--color-border);
  padding:34px 0 30px;position:relative;
}
.svc::after{
  content:"";position:absolute;left:0;top:-1px;height:2px;width:100%;
  background:var(--color-accent);transform:scaleX(0);transform-origin:left;
  transition:transform var(--dur-slow) var(--ease-out);
}
.svc:hover::after{transform:scaleX(1);}
.svc .ico{
  width:42px;height:42px;flex:none;color:var(--color-accent);margin-bottom:20px;
  display:flex;align-items:center;justify-content:center;
  transition:transform var(--dur-base) var(--ease-out);
}
.svc:hover .ico{transform:translateX(6px);}
.svc .ico svg{width:30px;height:30px;stroke:currentColor;fill:none;stroke-width:1.3;stroke-linecap:round;stroke-linejoin:round;}
.svc b{font-family:var(--font-serif);font-size:20px;display:block;font-weight:700;letter-spacing:2px;}
.svc span{display:block;margin-top:14px;font-size:15px;color:var(--color-text-2);line-height:1.9;}

.advs{display:grid;grid-template-columns:repeat(4,1fr);gap:0 40px;}
.adv{
  background:transparent;border:0;border-top:1px solid var(--color-text);padding:30px 0 0;position:relative;
}
.adv::before{
  content:"";position:absolute;left:0;top:-1px;width:32px;height:2px;background:var(--color-accent);
  transition:width var(--dur-slow) var(--ease-out);
}
.adv:hover::before{width:100%;}
.adv b{font-family:var(--font-serif);font-size:19px;display:block;letter-spacing:2px;}
.adv span{display:block;margin-top:12px;font-size:14.5px;color:var(--color-text-2);line-height:1.85;}

/* ---------- 服务流程：大号序号 ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:0 40px;}
.step{
  background:transparent;border:0;border-top:1px solid var(--color-border);padding:30px 0 0;position:relative;
}
.step::after{
  content:"";position:absolute;left:0;top:-1px;height:2px;width:100%;
  background:var(--color-accent);transform:scaleX(0);transform-origin:left;
  transition:transform var(--dur-slow) var(--ease-out);
}
.step:hover::after{transform:scaleX(1);}
.step i{
  font-style:normal;font-family:var(--font-serif);font-size:34px;font-weight:400;
  color:var(--color-accent);letter-spacing:1px;display:block;line-height:1;
  transition:transform var(--dur-base) var(--ease-out);
}
.step:hover i{transform:translateY(-4px);}
.step b{display:block;margin-top:20px;font-family:var(--font-serif);font-size:18px;letter-spacing:2px;}
.step span{display:block;margin-top:12px;font-size:14.5px;color:var(--color-text-2);line-height:1.85;}

/* ---------- 联系我们 ---------- */
.ct{display:grid;grid-template-columns:1.1fr .9fr;gap:72px;align-items:start;}
.ct-list{background:transparent;border:0;border-top:1px solid var(--color-text);padding:0;}
.ct-list .fact dt{width:110px;}
.ct-list a{position:relative;}
.ct-list a::after{
  content:"";position:absolute;left:0;bottom:-2px;height:1px;width:100%;
  background:var(--color-accent);transform:scaleX(0);transform-origin:left;
  transition:transform var(--dur-base) var(--ease-out);
}
.ct-list a:hover::after{transform:scaleX(1);}
.ct-list a:hover{color:var(--color-accent);}
.ct-card{
  border:0;border-top:3px solid var(--color-accent);padding:40px 0 0;
  display:flex;flex-direction:column;justify-content:flex-start;
}
.ct-card h3{font-family:var(--font-serif);font-size:clamp(26px,3vw,38px);line-height:1.4;font-weight:700;letter-spacing:3px;}
.ct-card .ln{width:44px;height:1px;background:var(--color-accent);margin:26px 0;transition:width var(--dur-slow) var(--ease-out);}
.ct-card:hover .ln{width:90px;}
.ct-card p{color:var(--color-text-2);font-size:16px;line-height:1.9;}
.map{
  margin-top:56px;border-top:1px solid var(--color-border);border-bottom:1px solid var(--color-border);
  padding:40px 0;background:transparent;
}
.map-card{display:flex;align-items:center;gap:22px;max-width:760px;}
.map-card svg{width:34px;height:34px;flex:none;fill:none;stroke:var(--color-accent);stroke-width:1.4;
  stroke-linecap:round;stroke-linejoin:round;
  transition:transform var(--dur-base) var(--ease-out);}
.map:hover .map-card svg{transform:scale(1.12);}
.map-card b{display:block;font-family:var(--font-serif);font-size:19px;letter-spacing:2px;}
.map-card span{display:block;margin-top:10px;font-size:15px;color:var(--color-text-2);}
.map-card small{display:block;margin-top:12px;font-size:13px;color:var(--color-muted);letter-spacing:1px;}
.map-card em{font-style:normal;color:var(--color-accent);}

/* ---------- CTA 横幅 ---------- */
.cta-band{
  border-top:2px solid var(--color-text);border-bottom:1px solid var(--color-border);
  padding:52px 0 46px;display:flex;align-items:center;justify-content:space-between;
  gap:32px;flex-wrap:wrap;position:relative;background:transparent;
}
.cta-band h2{
  font-family:var(--font-serif);font-size:clamp(26px,3.2vw,40px);
  font-weight:700;line-height:1.35;letter-spacing:3px;
}
.cta-band p{
  color:var(--color-text-2);margin-top:16px;font-size:16.5px;max-width:52ch;line-height:1.9;
}
@media (max-width:760px){.cta-band{padding:38px 0 34px;}}

.cta-band .btn-s{
  border-color:var(--color-text);color:var(--color-text);
  background:var(--color-bg);
}
/* 悬停：底色由宣纸擦除为朱砂，强调色只留给关键动作 */
.cta-band .btn-s::before{background:var(--color-accent);}
.cta-band .btn-s:hover{
  color:var(--color-on-accent);border-color:var(--color-accent);
}
.cta-band .btn-s:hover::before{transform:scaleY(1);}

/* ---------- 联系方式三通道 ---------- */
.ct-channels{display:grid;grid-template-columns:repeat(3,1fr);gap:0 48px;}.ct-channel{
  border-top:1px solid var(--color-text, #1A1814);padding:30px 0 0;position:relative;
}
.ct-channel::before{
  content:"";position:absolute;left:0;top:-1px;width:32px;height:2px;background:var(--color-accent, #C8321E);
  transition:width var(--dur-slow, 640ms) var(--ease-out, ease);
}
.ct-channel:hover::before{width:100%;}
.ct-channel__k{
  display:block;font-family:var(--font-serif, serif);font-size:14px;letter-spacing:4px;
  color:var(--color-muted, #6E6759);margin-bottom:16px;
}
.ct-channel__v{
  display:block;font-family:var(--font-serif, serif);font-size:clamp(21px,2.4vw,28px);
  font-weight:700;letter-spacing:1px;color:var(--color-text, #1A1814);
  transition:color var(--dur-fast, 160ms) ease-out;
}
a.ct-channel__v:hover{color:var(--color-accent, #C8321E);}
.ct-channel__d{
  display:block;margin-top:14px;font-size:13.5px;line-height:1.75;color:var(--color-muted, #6E6759);
}
@media (max-width:920px){.ct-channels{grid-template-columns:1fr;gap:28px;}}

/* ---------- 页脚 ---------- */
footer{background:var(--color-bg);color:var(--color-text);padding:72px 0 40px;margin-top:0;}
.foot{display:flex;justify-content:space-between;gap:32px;flex-wrap:wrap;align-items:flex-start;}
.foot .logo{color:var(--color-text);}
.foot .logo small{color:var(--color-muted);}
.foot .logo-mark{background:var(--color-accent);color:var(--color-on-accent);}
.foot nav{display:flex;gap:30px;flex-wrap:wrap;}
.foot nav a{font-size:15px;color:var(--color-text-2);font-family:var(--font-serif);letter-spacing:1.5px;position:relative;
  display:inline-block;padding:10px 0;min-height:44px;}
.foot nav a::after{
  content:"";position:absolute;left:0;bottom:-4px;height:1px;width:100%;
  background:var(--color-accent);transform:scaleX(0);transform-origin:left;
  transition:transform var(--dur-base) var(--ease-out);
}
.foot nav a:hover::after{transform:scaleX(1);}
.foot nav a:hover{color:var(--color-accent);}
.copy{
  width:100%;margin-top:44px;padding-top:26px;border-top:1px solid var(--color-border);
  font-size:13px;color:var(--color-muted);line-height:2;
}
.copy a{color:var(--color-text-2);}

/* ---------- 备案号（合规信息，独立成行，克制处理） ---------- */
.copy .beian{display:block;margin-top:2px;}
.copy .beian a{
  display:inline-block;padding:10px 0;min-height:44px;
  font-size:var(--fs-xs);line-height:1.6;letter-spacing:1px;
  color:var(--color-muted);
  text-decoration:underline;text-decoration-color:var(--color-border-strong);
  text-underline-offset:4px;
  transition:color var(--dur-fast) var(--ease-out),text-decoration-color var(--dur-fast) var(--ease-out);
}
.copy .beian a:hover{color:var(--color-accent);text-decoration-color:var(--color-accent);}

/* ============================================================
   动效 · 错峰入场序列
   [data-rise] 组内按 DOM 顺序延迟 --d 毫秒，JS 负责分配
   ============================================================ */
[data-rise]{opacity:0;transform:translateY(24px);}
[data-rise].in{
  opacity:1;transform:none;
  transition:opacity var(--dur-slow) var(--ease-out),transform var(--dur-slow) var(--ease-out);
  transition-delay:var(--d,0ms);
}

/* 区块级整体淡入 */
.rv{opacity:0;transform:translateY(24px);}
.rv.in{
  opacity:1;transform:none;
  transition:opacity var(--dur-slow) var(--ease-out),transform var(--dur-slow) var(--ease-out);
}
html.no-js .rv,html.no-js [data-rise]{opacity:1;transform:none;}

/* 降级：完全关闭动效 */
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;}
  html{scroll-behavior:auto;}
  .rv,[data-rise]{opacity:1;transform:none;}
  .btn::before,.nav-links a::after,.foot nav a::after,.ct-list a::after,
  .svc::after,.step::after,.adv::before,.mv-card::before{transform:none!important;}
  .sec-head .bar{width:52px;}
  .sec-head.center .bar{width:52px;}
}

/* ---------- 响应式 ---------- */
@media (max-width:1080px){
  .svcs-4{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:920px){
  .about,.ct{grid-template-columns:1fr;gap:48px;}
  .svcs,.advs,.steps{grid-template-columns:repeat(2,1fr);}
  .stats{grid-template-columns:repeat(3,1fr);}
}
@media (max-width:760px){
  .wrap{padding:0 22px;}
  h1{font-size:clamp(34px,10vw,44px);letter-spacing:2px;}
  .sec-head h2{letter-spacing:2px;}
  h1 .grad{letter-spacing:2px;}
  .nav-links{
    position:absolute;top:84px;left:0;right:0;background:var(--color-bg);
    border-bottom:1px solid var(--color-border);flex-direction:column;align-items:flex-start;gap:0;
    padding:10px 22px 22px;display:none;
  }
  .nav-links.open{display:flex;}
  .nav-links a{padding:14px 0;width:100%;}
  .nav-cta{margin-top:10px;text-align:center;}
  .nav-toggle{display:block;}
  section{padding:72px 0;}
  .hero{padding:72px 0 64px;}
  .svcs,.advs,.steps,.stats{grid-template-columns:1fr;}
  .stat{border-right:none;padding:22px 0 0;border-top:1px solid var(--color-border);}
  .stat:first-child{border-top:none;}
  .stat:nth-child(2),.stat:last-child{padding-left:0;}
  .fact{flex-direction:column;gap:4px;}
  .fact dt{width:auto;}
  .hero-btns .btn{width:100%;}
  .mv{gap:32px;}
}