/* =========================================================
   杭州珑墒科技有限公司 — 官网样式
   ========================================================= */

/* ---------- 设计变量 ---------- */
:root{
  --ink:#140e22;
  --ink-2:#231a37;
  --muted:#6a627e;
  --primary:#7c3aed;
  --primary-d:#6d28d9;
  --accent:#a855f7;
  --grad:linear-gradient(135deg,#7c3aed 0%,#9333ea 100%);
  --bg:#ffffff;
  --soft:#f7f4fd;
  --line:#ebe6f8;
  --white:#fff;

  --radius:16px;
  --radius-lg:24px;
  --radius-pill:999px;

  --shadow-sm:0 2px 8px rgba(76,29,149,.06);
  --shadow:0 12px 32px rgba(76,29,149,.09);
  --shadow-lg:0 28px 64px rgba(76,29,149,.16);

  --container:1180px;
  --header-h:74px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- 基础重置 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC","Noto Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.7;
  font-size:16px;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:700;letter-spacing:-.01em}
p{margin:0}
button,input,select,textarea{font:inherit;color:inherit}

.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 24px;
}

/* ---------- 通用按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5em;
  padding:14px 28px;
  border-radius:var(--radius-pill);
  font-weight:600;
  font-size:15px;
  border:1.5px solid transparent;
  cursor:pointer;
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),background .25s,color .25s,border-color .25s;
  white-space:nowrap;
}
.btn-primary{
  background:var(--grad);
  color:#fff;
  box-shadow:0 12px 26px rgba(124,58,237,.32);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 34px rgba(124,58,237,.42)}
.btn-ghost{
  background:rgba(255,255,255,.08);
  border-color:rgba(255,255,255,.45);
  color:#fff;
  backdrop-filter:blur(6px);
}
.btn-ghost:hover{background:rgba(255,255,255,.18);transform:translateY(-2px)}
.btn-block{width:100%}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:fixed;
  inset:0 0 auto 0;
  z-index:100;
  height:var(--header-h);
  display:flex;
  align-items:center;
  transition:background .35s var(--ease),box-shadow .35s var(--ease),height .35s var(--ease);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0}
.brand-logo{
  display:inline-flex;
  align-items:center;
  padding:5px 10px;
  background:#fff;
  border-radius:12px;
  box-shadow:0 6px 18px rgba(38,15,74,.18);
  transition:box-shadow .35s var(--ease),transform .35s var(--ease);
}
.brand:hover .brand-logo{transform:translateY(-1px)}
.brand-logo img{height:42px;width:auto;display:block;transition:height .35s var(--ease)}

.nav{display:flex;align-items:center;gap:6px}
.nav a{
  position:relative;
  padding:10px 16px;
  font-size:15px;
  font-weight:500;
  color:rgba(255,255,255,.9);
  border-radius:var(--radius-pill);
  transition:color .3s,background .3s;
}
.nav a:not(.nav-cta)::after{
  content:"";
  position:absolute;
  left:16px;right:16px;bottom:6px;
  height:2px;
  background:currentColor;
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .3s var(--ease);
  border-radius:2px;
}
.nav a:not(.nav-cta):hover::after{transform:scaleX(1)}
.nav a.nav-cta{
  background:var(--grad);
  color:#fff;
  padding:11px 22px;
  margin-left:8px;
  box-shadow:0 10px 22px rgba(124,58,237,.35);
  transition:transform .25s var(--ease),box-shadow .25s var(--ease);
}
.nav a.nav-cta:hover{transform:translateY(-2px);box-shadow:0 16px 30px rgba(124,58,237,.45)}

/* 滚动态：白底深字 */
.site-header.scrolled{
  background:rgba(255,255,255,.86);
  backdrop-filter:blur(14px) saturate(180%);
  box-shadow:0 6px 24px rgba(76,29,149,.08);
  height:66px;
}
.site-header.scrolled .brand-logo{box-shadow:0 4px 14px rgba(76,29,149,.14)}
.site-header.scrolled .brand-logo img{height:36px}
.site-header.scrolled .nav a{color:var(--ink-2)}
.site-header.scrolled .nav a.nav-cta{color:#fff}
.site-header.scrolled .nav-toggle span{background:var(--ink)}

/* 汉堡按钮 */
.nav-toggle{
  display:none;
  flex-direction:column;
  gap:5px;
  width:44px;height:44px;
  border:0;background:transparent;
  justify-content:center;
  align-items:center;
  cursor:pointer;
}
.nav-toggle span{
  display:block;
  width:24px;height:2px;border-radius:2px;
  background:#fff;
  transition:transform .3s var(--ease),opacity .3s;
}
.nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- 首屏 Hero ---------- */
.hero{
  position:relative;
  min-height:100vh;
  min-height:100svh;
  display:flex;
  align-items:center;
  overflow:hidden;
  background:var(--ink);
  padding:calc(var(--header-h) + 40px) 0 80px;
}
.hero-bg{
  position:absolute;inset:0;
  background:url("../assets/images/hero-bg.jpg") center/cover no-repeat;
  transform:scale(1.08);
  animation:heroZoom 18s var(--ease) forwards;
}
@keyframes heroZoom{from{transform:scale(1.14)}to{transform:scale(1.02)}}
.hero-overlay{
  position:absolute;inset:0;
  background:
    radial-gradient(120% 90% at 12% 20%,rgba(124,58,237,.55),transparent 55%),
    linear-gradient(120deg,rgba(16,9,28,.94) 0%,rgba(26,14,44,.86) 45%,rgba(32,17,54,.62) 100%);
}
.hero-inner{position:relative;z-index:2;max-width:820px}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 16px;
  margin-bottom:22px;
  font-size:13px;letter-spacing:.16em;
  color:#e4d8ff;
  border:1px solid rgba(190,150,255,.35);
  background:rgba(124,58,237,.18);
  border-radius:var(--radius-pill);
  backdrop-filter:blur(4px);
}
.hero-tag::before{
  content:"";width:7px;height:7px;border-radius:50%;
  background:var(--accent);box-shadow:0 0 0 4px rgba(168,85,247,.28);
}
.hero h1{
  font-size:clamp(2.1rem,5.2vw,3.6rem);
  line-height:1.18;
  color:#fff;
  margin-bottom:22px;
  letter-spacing:-.02em;
}
.grad-text{
  background:linear-gradient(100deg,#5aa2ff,#22e3f5);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-desc{
  font-size:clamp(1rem,1.6vw,1.14rem);
  color:rgba(233,240,255,.86);
  max-width:620px;
  margin-bottom:34px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:52px}

.hero-metrics{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:16px;
  max-width:640px;
}
.hero-metrics li{
  padding:16px 18px;
  border-radius:var(--radius);
  background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.14);
  backdrop-filter:blur(8px);
}
.hero-metrics strong{display:block;color:#fff;font-size:1.02rem;margin-bottom:2px}
.hero-metrics span{font-size:13px;color:rgba(210,225,255,.72)}

.scroll-hint{
  position:absolute;
  left:50%;bottom:26px;transform:translateX(-50%);
  width:26px;height:42px;
  border:2px solid rgba(255,255,255,.4);
  border-radius:16px;
  z-index:3;
  display:flex;justify-content:center;
}
.scroll-hint span{
  width:4px;height:8px;margin-top:7px;border-radius:2px;
  background:rgba(255,255,255,.85);
  animation:hint 1.8s infinite;
}
@keyframes hint{
  0%{opacity:0;transform:translateY(0)}
  40%{opacity:1}
  80%{opacity:0;transform:translateY(14px)}
  100%{opacity:0}
}

/* ---------- 通用区块 ---------- */
.section{padding:96px 0}
.section-soft{background:var(--soft)}
.section-head{max-width:720px;margin:0 auto 56px;text-align:center}
.eyebrow{
  display:inline-block;
  font-size:13px;font-weight:700;letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--primary);
  margin-bottom:14px;
}
.section-head .eyebrow{color:var(--primary)}
h2{font-size:clamp(1.6rem,3.2vw,2.35rem);letter-spacing:-.02em}
.section-sub{margin-top:16px;color:var(--muted);font-size:1.02rem}

/* ---------- 业务卡片 ---------- */
.cards{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(260px,1fr));
  gap:26px;
}
.card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  overflow:hidden;
  display:flex;flex-direction:column;
  box-shadow:var(--shadow-sm);
  transition:transform .4s var(--ease),box-shadow .4s var(--ease),border-color .4s;
}
.card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg);border-color:transparent}
.card-media{position:relative;aspect-ratio:16/10;overflow:hidden}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .7s var(--ease)}
.card:hover .card-media img{transform:scale(1.07)}
.card-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(8,20,38,.06),rgba(8,20,38,.5));
}
.card-icon{
  position:absolute;left:18px;bottom:-22px;z-index:2;
  width:52px;height:52px;
  display:grid;place-items:center;
  border-radius:14px;
  background:var(--grad);
  color:#fff;
  box-shadow:0 12px 24px rgba(124,58,237,.4);
}
.card-icon svg{width:26px;height:26px}
.card-body{padding:38px 22px 24px;display:flex;flex-direction:column;gap:12px;flex:1}
.card-body h3{font-size:1.22rem}
.card-body p{color:var(--muted);font-size:.95rem;flex:1}
.tag-list{display:flex;flex-wrap:wrap;gap:8px;margin-top:6px}
.tag-list li{
  font-size:12.5px;
  padding:5px 12px;
  border-radius:var(--radius-pill);
  background:rgba(124,58,237,.08);
  color:var(--primary-d);
  font-weight:500;
}

/* ---------- 关于我们 ---------- */
.about-grid{
  display:grid;
  grid-template-columns:0.9fr 1.1fr;
  gap:64px;
  align-items:center;
}
.about-media{position:relative}
.about-media img{
  width:100%;
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow);
  aspect-ratio:4/3;
  object-fit:cover;
}
.about-media::before{
  content:"";position:absolute;
  inset:-18px -18px auto auto;
  width:150px;height:150px;
  border-radius:22px;
  background:var(--grad);
  opacity:.16;
  z-index:-1;
}
.about-badge{
  position:absolute;
  left:-14px;bottom:-22px;
  background:#fff;
  border-radius:var(--radius);
  padding:16px 22px;
  box-shadow:var(--shadow);
  display:flex;flex-direction:column;
  border:1px solid var(--line);
}
.about-badge strong{font-size:1.5rem;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.about-badge span{font-size:12.5px;color:var(--muted)}
.about-copy h2{margin-bottom:20px}
.about-copy p{color:var(--muted);margin-bottom:16px}
.check-list{margin:26px 0;display:flex;flex-direction:column;gap:14px}
.check-list li{display:flex;align-items:center;gap:12px;font-weight:500;color:var(--ink-2)}
.check{
  flex-shrink:0;
  width:22px;height:22px;border-radius:50%;
  background:var(--grad);
  position:relative;
}
.check::after{
  content:"";position:absolute;left:7px;top:4px;
  width:6px;height:11px;
  border:solid #fff;border-width:0 2px 2px 0;
  transform:rotate(45deg);
}
.about-copy .check-list + p{margin-top:4px}

/* ---------- 优势 ---------- */
.feature-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(230px,1fr));
  gap:24px;
}
.feature{
  padding:34px 28px;
  border-radius:var(--radius-lg);
  background:#fff;
  border:1px solid var(--line);
  position:relative;
  overflow:hidden;
  transition:transform .4s var(--ease),box-shadow .4s var(--ease);
}
.feature::before{
  content:"";position:absolute;left:0;top:0;height:100%;width:4px;
  background:var(--grad);
  transform:scaleY(0);transform-origin:top;
  transition:transform .4s var(--ease);
}
.feature:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.feature:hover::before{transform:scaleY(1)}
.feature-icon{
  width:54px;height:54px;border-radius:15px;
  display:grid;place-items:center;
  background:rgba(124,58,237,.1);
  color:var(--primary);
  margin-bottom:20px;
  transition:background .4s,color .4s,transform .4s var(--ease);
}
.feature-icon svg{width:26px;height:26px}
.feature:hover .feature-icon{background:var(--grad);color:#fff;transform:rotate(-6deg)}
.feature h3{font-size:1.13rem;margin-bottom:10px}
.feature p{color:var(--muted);font-size:.94rem}

/* ---------- 合作流程 ---------- */
.process{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
  gap:24px;
  counter-reset:step;
}
.step{
  position:relative;
  padding:32px 26px;
  background:#fff;
  border-radius:var(--radius-lg);
  border:1px solid var(--line);
  box-shadow:var(--shadow-sm);
  transition:transform .4s var(--ease),box-shadow .4s var(--ease);
}
.step:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.step-num{
  display:inline-block;
  font-size:2.1rem;
  font-weight:800;
  line-height:1;
  background:var(--grad);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  opacity:.85;
  margin-bottom:16px;
}
.step h3{font-size:1.1rem;margin-bottom:10px}
.step p{color:var(--muted);font-size:.93rem}

/* ---------- CTA ---------- */
.cta{
  position:relative;
  overflow:hidden;
  padding:88px 0;
  background:var(--ink);
}
.cta-bg{
  position:absolute;inset:0;
  background:url("../assets/images/cta-bg.jpg") center/cover no-repeat;
  transform:scale(1.05);
}
.cta::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(120deg,rgba(9,18,36,.93),rgba(24,60,130,.88));
}
.cta-inner{position:relative;z-index:2;text-align:center;max-width:720px;margin:0 auto}
.cta-inner h2{color:#fff;margin-bottom:16px}
.cta-inner p{color:rgba(225,236,255,.85);margin-bottom:32px}
.cta .hero-actions{justify-content:center;margin-bottom:0}

/* ---------- 联系我们 ---------- */
.contact-grid{
  display:grid;
  grid-template-columns:1fr 1.05fr;
  gap:60px;
  align-items:start;
}
.contact-info h2{margin-bottom:16px}
.contact-info>p{color:var(--muted);margin-bottom:30px}
.contact-list{display:flex;flex-direction:column;gap:18px}
.contact-list li{display:flex;align-items:center;gap:16px}
.ci-icon{
  flex-shrink:0;width:48px;height:48px;border-radius:14px;
  display:grid;place-items:center;
  background:rgba(124,58,237,.09);
  color:var(--primary);
}
.ci-icon svg{width:22px;height:22px}
.contact-list small{display:block;font-size:12.5px;color:var(--muted);letter-spacing:.04em}
.contact-list a,.contact-list span{font-weight:600;font-size:1.02rem}
.contact-list a:hover{color:var(--primary)}

.contact-form{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:36px;
  box-shadow:var(--shadow);
  display:flex;flex-direction:column;gap:18px;
}
.field{display:flex;flex-direction:column;gap:8px}
.field label{font-size:13.5px;font-weight:600;color:var(--ink-2)}
.field input,.field select,.field textarea{
  width:100%;
  padding:13px 15px;
  border:1.5px solid var(--line);
  border-radius:12px;
  background:#fbfcfe;
  font-size:15px;
  transition:border-color .25s,box-shadow .25s,background .25s;
  resize:vertical;
}
.field input::placeholder,.field textarea::placeholder{color:#9aa8bd}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;
  border-color:var(--primary);
  background:#fff;
  box-shadow:0 0 0 4px rgba(124,58,237,.12);
}
.field select{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%235c6b82' stroke-width='2' stroke-linecap='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center;background-size:18px;padding-right:42px}
.form-note{font-size:14px;min-height:20px;margin:0;text-align:center}
.form-note.ok{color:#0f9d58}
.form-note.err{color:#e0403f}
.field.invalid input,.field.invalid textarea{border-color:#e0403f;background:#fff6f6}
/* 蜜罐字段：仅用于拦截机器人填写，正常访客不可见 */
.hp{position:absolute !important;left:-9999px;width:1px;height:1px;overflow:hidden}

/* ---------- 页脚 ---------- */
.site-footer{background:#0e0a1a;color:#cdc6e0;padding-top:64px}
.footer-inner{
  display:grid;
  grid-template-columns:1.2fr 2fr;
  gap:48px;
  padding-bottom:48px;
}
.footer-brand .brand{margin-bottom:16px}
.footer-brand .brand-logo{padding:6px 12px}
.footer-brand .brand-logo img{height:40px}
.footer-brand p{color:#9a92b0;font-size:.94rem;max-width:280px}
.footer-nav{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.footer-nav h4{color:#fff;font-size:.95rem;margin-bottom:16px}
.footer-nav a,.footer-nav span{display:block;color:#9a92b0;font-size:.9rem;margin-bottom:10px;transition:color .25s}
.footer-nav a:hover{color:var(--accent)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.09);padding:20px 0}
.footer-bottom .container{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}
.footer-bottom span{font-size:13px;color:#8a82a0}
.footer-icp{font-size:13px;color:#8a82a0;transition:color .25s}
.footer-icp:hover{color:var(--accent)}

/* ---------- 回到顶部 ---------- */
.to-top{
  position:fixed;
  right:24px;bottom:24px;
  width:46px;height:46px;
  border-radius:50%;
  background:var(--grad);
  color:#fff;
  display:grid;place-items:center;
  box-shadow:0 12px 26px rgba(124,58,237,.4);
  opacity:0;visibility:hidden;
  transform:translateY(14px);
  transition:opacity .3s,transform .3s,visibility .3s;
  z-index:90;
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top svg{width:22px;height:22px}

/* ---------- 滚动揭示动画 ---------- */
[data-reveal]{
  opacity:0;
  transform:translateY(26px);
  transition:opacity .7s var(--ease),transform .7s var(--ease);
  will-change:opacity,transform;
}
[data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:980px){
  .about-grid,.contact-grid{grid-template-columns:1fr;gap:44px}
  .about-media{max-width:540px}
  .footer-inner{grid-template-columns:1fr;gap:36px}
}

@media (max-width:820px){
  .nav-toggle{display:flex}
  .nav{
    position:fixed;
    top:var(--header-h);left:0;right:0;
    flex-direction:column;
    align-items:stretch;
    gap:4px;
    padding:18px 20px 26px;
    background:rgba(255,255,255,.97);
    backdrop-filter:blur(14px);
    box-shadow:0 20px 40px rgba(76,29,149,.14);
    border-top:1px solid var(--line);
    transform:translateY(-12px);
    opacity:0;visibility:hidden;
    transition:opacity .3s,transform .3s,visibility .3s;
  }
  .nav.open{opacity:1;visibility:visible;transform:translateY(0)}
  .nav a{color:var(--ink-2) !important;padding:13px 16px;border-radius:12px}
  .nav a:not(.nav-cta)::after{display:none}
  .nav a:not(.nav-cta):hover{background:var(--soft)}
  .nav a.nav-cta{margin:8px 0 0;text-align:center;color:#fff !important}
  .site-header.scrolled .nav{top:66px}
}

@media (max-width:640px){
  .section{padding:66px 0}
  .hero-metrics{grid-template-columns:1fr}
  .hero{padding-top:calc(var(--header-h) + 24px)}
  .brand-logo img{height:34px}
  .contact-form{padding:26px}
  .footer-nav{grid-template-columns:1fr 1fr}
  .about-badge{left:12px}
  .cta{padding:64px 0}
}

@media (max-width:400px){
  .footer-nav{grid-template-columns:1fr}
}

/* ---------- 无障碍：尊重减弱动效偏好 ---------- */
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition-duration:.01ms !important}
  html{scroll-behavior:auto}
  [data-reveal]{opacity:1;transform:none}
}