/* ============================================================
   青岛荣乐科技 · 官方主页  —  设计系统沿用 RONGLE-IoT 平台
   NVIDIA 黑绿  #000 + #76B900  ·  Vercel 风格鼠标交互
   ============================================================ */
:root{
  --bg:#000000; --bg-1:#060A06; --bg-2:#0A0F0A;
  --surface:#0C110C; --surface-2:#111811;
  --border:rgba(118,185,0,.16); --border-strong:rgba(118,185,0,.40);
  --border-soft:rgba(255,255,255,.07);
  --green:#76B900; --green-bright:#9BE000; --green-dim:#1F3D00;
  --green-soft:rgba(118,185,0,.12); --green-glow:rgba(118,185,0,.35);
  --text:#F5F7F5; --text-2:#9CA3AF; --text-3:#5B6472;
  --r:14px; --r-sm:10px; --ease:cubic-bezier(.22,.61,.36,1);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg); color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Hiragino Sans GB','Microsoft YaHei','Source Han Sans SC','Noto Sans CJK SC',system-ui,sans-serif;
  -webkit-font-smoothing:antialiased; line-height:1.6; overflow-x:hidden;
}
::selection{background:rgba(118,185,0,.3);color:#fff}
a{color:inherit;text-decoration:none}
h1,h2,h3{font-weight:700;letter-spacing:-.01em;line-height:1.15}
.eyebrow{
  display:inline-block;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,'Liberation Mono',monospace;font-size:11px;
  letter-spacing:3px;color:var(--green);text-transform:uppercase;margin-bottom:14px;
  padding:4px 10px;border:1px solid var(--border);border-radius:999px;background:var(--green-soft);
}
.g{color:var(--green);text-shadow:0 0 26px var(--green-glow)}
.section-h{max-width:760px;margin:0 auto 48px;text-align:center}
.section-h h2{font-size:clamp(26px,4vw,40px)}
.section-h .sub{margin-top:14px;color:var(--text-2);font-size:15px}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;cursor:pointer;
  background:var(--green);color:#0a0f0a;font-weight:700;font-size:15px;
  padding:13px 22px;border:none;border-radius:var(--r-sm);letter-spacing:.5px;
  transition:transform .15s var(--ease),box-shadow .2s,background .2s,opacity .2s;
}
.btn:hover{transform:translateY(-1px);box-shadow:0 8px 28px var(--green-glow);background:var(--green-bright)}
.btn--ghost{background:transparent;color:var(--text);border:1px solid var(--border-soft)}
.btn--ghost:hover{background:var(--surface);box-shadow:none;border-color:var(--border)}
.btn--sm{padding:9px 16px;font-size:13px}
.btn:disabled{opacity:.4;cursor:not-allowed;transform:none;box-shadow:none}

/* ===== 导航 ===== */
.nav{position:fixed;top:0;left:0;right:0;z-index:60;transition:background .3s,border-color .3s,backdrop-filter .3s}
.nav.scrolled{background:rgba(0,0,0,.72);backdrop-filter:blur(12px);border-bottom:1px solid var(--border-soft)}
.nav__inner{max-width:1200px;margin:0 auto;height:68px;padding:0 28px;display:flex;align-items:center;gap:24px}
.brand{display:flex;align-items:center;gap:11px;cursor:pointer}
.brand__r{height:34px;width:auto;filter:drop-shadow(0 0 8px rgba(118,185,0,.4))}
.brand__txt{display:flex;flex-direction:column;line-height:1.05}
.brand__name{font-size:15px;font-weight:800;letter-spacing:1px;color:#a2ea31}
.brand__tag{font-size:8.5px;letter-spacing:1.6px;color:#a2ea31;margin-top:2px}
.nav__links{display:flex;gap:28px;margin-left:18px}
.nav__links a{font-size:14px;color:var(--text-2);transition:color .2s;position:relative}
.nav__links a:hover{color:var(--text)}
.nav__links a::after{content:"";position:absolute;left:0;bottom:-6px;width:0;height:2px;background:var(--green);transition:width .25s var(--ease);box-shadow:0 0 8px var(--green)}
.nav__links a:hover::after{width:100%}
.nav__actions{margin-left:auto;display:flex;align-items:center;gap:12px}
.nav__user{display:none;align-items:center;gap:10px}
.nav__user.show{display:flex}
.nav__user .av{width:32px;height:32px;border-radius:50%;background:linear-gradient(135deg,var(--green),#2a4d00);display:flex;align-items:center;justify-content:center;font-weight:700;color:#0a0f0a;font-size:13px}
.nav__user .nm{font-size:13px;color:var(--text)}
.nav__user .out{font-size:12px;color:var(--text-3);cursor:pointer}
.nav__user .out:hover{color:var(--green)}

/* ===== 英雄区 ===== */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;overflow:hidden;padding:120px 28px 80px}
.fx-glow,.fx-sphere{position:absolute;inset:0;pointer-events:none;z-index:0}
.fx-glow{background:radial-gradient(448px circle at var(--mx,-999px) var(--my,-999px),rgba(118,185,0,.10),transparent 65%)}
.fx-sphere{width:100%;height:100%;display:block}
.fx-logo{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%) scale(.92);opacity:0;pointer-events:none;z-index:0;transition:opacity .55s var(--ease),transform .55s var(--ease);filter:drop-shadow(0 0 30px rgba(118,185,0,.4))}
.fx-logo.is-visible{opacity:.8;transform:translate(-50%,-50%) scale(1)}
.fx-logo img{height:119px;width:auto;display:block}
.hero__inner{position:relative;z-index:1;max-width:1200px;margin:0 auto;width:100%;display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero__title{font-size:clamp(34px,5.4vw,60px);font-weight:800}
.hero__sub{margin-top:22px;color:var(--text-2);max-width:480px;font-size:16px}
.hero__cta{display:flex;gap:14px;margin-top:32px;flex-wrap:wrap}
.hero__stats{display:flex;gap:40px;margin-top:48px}
.hero__stats b{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,'Liberation Mono',monospace;font-size:30px;font-weight:700;color:var(--text)}
.hero__stats b span{color:var(--green)}
.hero__stats span{display:block;font-size:12px;color:var(--text-3);margin-top:4px;letter-spacing:.5px}
.hero__scroll{position:absolute;left:50%;bottom:26px;transform:translateX(-50%);width:24px;height:38px;border:1px solid var(--border);border-radius:14px;z-index:1}
.hero__scroll span{position:absolute;left:50%;top:8px;width:4px;height:8px;border-radius:2px;background:var(--green);transform:translateX(-50%);animation:scrolldot 1.8s var(--ease) infinite}
@keyframes scrolldot{0%{opacity:0;top:8px}40%{opacity:1}100%{opacity:0;top:22px}}

/* ===== 英雄区右侧图片轮播（三款风格，统一深绿主题） ===== */
.hero__visual{position:relative}
.hero-slider{position:relative;border:1px solid var(--border);border-radius:14px;overflow:hidden;background:#000;box-shadow:0 30px 80px rgba(0,0,0,.6),0 0 0 1px rgba(118,185,0,.08);aspect-ratio:3/2}
.hs-track{position:absolute;inset:0}
.hs-img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:0;transform:scale(1.06);transition:opacity .9s var(--ease),transform 6s linear;filter:saturate(1.06) contrast(1.02)}
.hs-img.is-active{opacity:1;transform:scale(1)}
.hs-bar{position:absolute;left:0;right:0;bottom:0;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 16px;background:linear-gradient(0deg,rgba(0,0,0,.82),transparent);z-index:2;pointer-events:none}
.hs-tag{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,'Liberation Mono',monospace;font-size:11px;letter-spacing:1px;color:var(--green);text-shadow:0 0 8px var(--green-glow)}
.hs-dots{display:flex;gap:8px;pointer-events:auto}
.hs-dot{width:8px;height:8px;border-radius:50%;background:rgba(255,255,255,.32);cursor:pointer;transition:background .25s,box-shadow .25s,width .25s,border-radius .25s}
.hs-dot.is-active{background:var(--green);box-shadow:0 0 8px var(--green);width:22px;border-radius:4px}

/* ===== Vercel 风格交互：glow-soft / glow-card ===== */
.glow-soft{position:relative}
.glow-soft::before{
  content:"";position:absolute;inset:0;border-radius:inherit;opacity:0;transition:opacity .3s;pointer-events:none;z-index:0;
  background:radial-gradient(340px circle at var(--mx,50%) var(--my,50%),rgba(118,185,0,.08),transparent 65%);
}
.glow-soft:hover::before{opacity:1}
.glow-soft>*{position:relative;z-index:1}
.glow-card{position:relative}
.glow-card::after{
  content:"";position:absolute;inset:0;border-radius:inherit;opacity:0;transition:opacity .3s;pointer-events:none;z-index:2;
  background:radial-gradient(220px circle at var(--mx,50%) var(--my,50%),rgba(118,185,0,.55),transparent 62%);
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;padding:1px;
}
.glow-card:hover::after{opacity:1}

/* ===== 业务领域 ===== */
.business{max-width:1200px;margin:0 auto;padding:110px 28px}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:20px}
.biz-card{border:1px solid var(--border-soft);border-radius:var(--r);padding:28px;background:var(--bg-2);transition:transform .25s var(--ease),border-color .25s,box-shadow .25s}
.biz-card:hover{transform:translateY(-4px);border-color:var(--border-strong);box-shadow:0 14px 40px rgba(118,185,0,.12)}
.biz-ic{width:48px;height:48px;border-radius:12px;background:var(--green-soft);display:flex;align-items:center;justify-content:center;color:var(--green);margin-bottom:18px}
.biz-ic svg{width:24px;height:24px}
.biz-card h3{font-size:20px;margin-bottom:10px}
.biz-card p{color:var(--text-2);font-size:14px}
.biz-card ul{list-style:none;margin-top:16px;display:flex;flex-direction:column;gap:9px}
.biz-card li{position:relative;padding-left:18px;font-size:13px;color:var(--text-2)}
.biz-card li::before{content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:50%;background:var(--green);box-shadow:0 0 6px var(--green)}

/* ===== 平台入口 ===== */
.platform{max-width:1000px;margin:0 auto;padding:40px 28px 110px}
.plat-card{position:relative;border:1px solid var(--border);border-radius:var(--r);padding:36px;background:linear-gradient(120deg,#0a140a,#000);overflow:hidden;display:flex;align-items:center;gap:28px;flex-wrap:wrap}
.plat-card__body{display:flex;align-items:center;gap:24px;flex:1;min-width:280px}
.plat-ic{width:64px;height:64px;border-radius:16px;background:var(--green-soft);display:flex;align-items:center;justify-content:center;color:var(--green);flex:none}
.plat-ic svg{width:34px;height:34px}
.plat-text h3{font-size:22px;margin-bottom:6px}
.plat-text p{color:var(--text-2);font-size:14px;max-width:480px}
.plat-enter{flex:none;margin-left:auto;transform:translateX(-50%)}
/* 悬停时保留左移量，仅叠加 1px 上浮，避免 .btn:hover 覆盖 transform 造成整块跳位 */
.btn.plat-enter:hover{transform:translateX(-50%) translateY(-1px)}
.plat-hint{text-align:center;margin-top:16px;font-size:12px;color:var(--text-3);font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,'Liberation Mono',monospace;letter-spacing:.5px}

/* ===== 关于我们 ===== */
.about{max-width:1200px;margin:0 auto;padding:0 28px 110px}
.about__grid{display:grid;grid-template-columns:1.25fr .75fr;gap:48px;max-width:1080px;margin:0 auto;align-items:start}
.about__lead h2{font-size:clamp(26px,3.6vw,38px);margin:6px 0 18px}
.about__lead p{color:var(--text-2);font-size:15px;max-width:560px}
.about__vals{display:flex;gap:18px;margin-top:28px;flex-wrap:wrap}
.about__vals div{display:flex;flex-direction:column}
.about__vals b{font-size:17px;color:var(--green)}
.about__vals span{font-size:12.5px;color:var(--text-3);margin-top:3px;max-width:150px}
.about__panel{border:1px solid var(--border-soft);border-radius:var(--r);padding:26px;background:var(--bg-2)}
.ap-row{display:flex;justify-content:space-between;gap:18px;padding:14px 0;border-bottom:1px solid var(--border-soft);font-size:14px}
.ap-row:last-child{border-bottom:none}
.ap-row span{color:var(--text-3);flex:none}
.ap-row b{color:var(--text);text-align:right;font-weight:600}

/* ===== 联系我们模块（关于右侧） ===== */
.contact{border:1px solid var(--border-soft);border-radius:var(--r);padding:28px;background:var(--bg-2);text-align:center;position:relative;overflow:hidden}
.contact h3{font-size:20px;margin:6px 0 18px;color:var(--text)}
.contact__qr{width:172px;height:172px;margin:0 auto;border-radius:12px;overflow:hidden;border:1px solid rgba(162,234,49,.35);background:rgba(162,234,49,.05);padding:10px;box-shadow:0 0 24px rgba(118,185,0,.15)}
.contact__qr img{width:100%;height:100%;object-fit:contain;display:block}
.contact__qr-cap{font-size:12.5px;color:var(--text-3);margin-top:10px}
.contact__call{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:18px;padding:12px 14px;border:1px solid var(--border-soft);border-radius:10px;background:var(--bg);text-align:left}
.contact__call-label{font-size:12px;color:var(--text-3);letter-spacing:.04em}
.contact__call-num{font-size:16px;font-weight:700;color:var(--green);font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,'Liberation Mono',monospace;text-decoration:none;letter-spacing:.5px}
.contact__actions{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:12px}
.contact__actions .btn{width:100%;justify-content:center;padding:10px 12px;font-size:13px}
.contact__submit{width:100%;justify-content:center;margin-top:12px}
.btn.copied{background:var(--green-dim);color:var(--green-bright);border-color:var(--border-strong)}

/* ===== 弹窗：提交需求（延续黑绿主题，功能对齐荣启实验） ===== */
.modal{position:fixed;inset:0;z-index:1200;display:none}
.modal.open{display:block}
.modal-backdrop{position:absolute;inset:0;background:rgba(0,0,0,.62);backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px)}
.modal-dialog{position:relative;max-width:460px;margin:9vh auto 0;background:var(--surface);border:1px solid var(--border);border-radius:18px;padding:34px 30px 30px;box-shadow:0 30px 80px rgba(0,0,0,.6),0 0 0 1px rgba(118,185,0,.08);animation:modalIn .26s cubic-bezier(.2,.7,.3,1)}
@keyframes modalIn{from{opacity:0;transform:translateY(14px) scale(.98)}to{opacity:1;transform:none}}
.modal-close{position:absolute;top:12px;right:16px;border:none;background:none;cursor:pointer;font-size:30px;line-height:1;color:var(--text-3);transition:color .15s ease}
.modal-close:hover{color:var(--green)}
.modal-dialog h3{font-size:22px;margin:0 0 6px;color:var(--text)}
.modal-sub{font-size:14px;color:var(--text-2);margin:0 0 22px}
.coop-form .field{display:block;margin-bottom:16px;text-align:left}
.field-label{display:block;font-size:13px;font-weight:600;color:var(--text-2);margin-bottom:7px}
.field-label i{color:#ff6b6b;font-style:normal}
.coop-form input,.coop-form textarea{width:100%;padding:11px 13px;border:1px solid var(--border-soft);border-radius:10px;font-size:14px;font-family:inherit;color:var(--text);background:var(--bg);transition:border-color .15s ease,box-shadow .15s ease}
.coop-form textarea{resize:vertical}
.coop-form input:focus,.coop-form textarea:focus{outline:none;border-color:var(--green);box-shadow:0 0 0 3px rgba(118,185,0,.18);background:var(--bg-2)}
.field-error{display:none;color:#ff6b6b;font-size:12px;margin-top:6px}
.field.invalid .field-error{display:block}
.field.invalid input,.field.invalid textarea{border-color:#ff6b6b}
.hp{display:none!important}
.form-status{font-size:13px;margin:12px 0 0;min-height:18px}
.form-status.ok{color:var(--green-bright)}
.form-status.err{color:#ff6b6b}
.btn-block{width:100%;justify-content:center}
@media (max-width:540px){.modal-dialog{margin:5vh 14px 0;padding:28px 20px 24px;border-radius:14px}.modal-dialog h3{font-size:20px}}

/* ===== 页脚 ===== */
.foot{border-top:1px solid var(--border-soft);background:#000;padding:34px 28px}
.foot__inner{max-width:1200px;margin:0 auto;display:flex;align-items:center;justify-content:center;gap:20px;flex-wrap:wrap}
.foot__meta{display:flex;flex-direction:column;gap:3px;font-size:12px;color:var(--text-3);text-align:center}

/* ===== 客户展示（精简：名称墙，占空间减半） ===== */
.clients{max-width:1080px;margin:0 auto;padding:0 28px 90px}
.section-h--sm{margin-bottom:30px}
.section-h--sm h2{font-size:clamp(22px,3vw,30px)}
.client-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
.client-name{border:1px solid var(--border-soft);border-radius:10px;padding:16px 10px;text-align:center;font-size:14.5px;font-weight:600;color:var(--text-2);background:var(--bg-2);transition:transform .25s var(--ease),border-color .25s,color .25s,box-shadow .25s}
.client-name:hover{transform:translateY(-3px);border-color:var(--border-strong);color:var(--green);box-shadow:0 10px 28px rgba(118,185,0,.12)}

/* ===== 提示条 ===== */
.toast{position:fixed;left:50%;bottom:34px;transform:translateX(-50%) translateY(20px);background:var(--bg-2);border:1px solid var(--border-strong);color:var(--text);padding:12px 20px;border-radius:999px;font-size:13.5px;opacity:0;pointer-events:none;transition:opacity .3s,transform .3s;z-index:120;box-shadow:0 10px 30px rgba(0,0,0,.5)}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
.toast b{color:var(--green)}

/* ===== 响应式 ===== */
@media (max-width:1080px){
  .client-grid{grid-template-columns:repeat(4,1fr)}
}
@media (max-width:720px){
  .client-grid{grid-template-columns:repeat(3,1fr)}
}
@media (max-width:880px){
  .hero__inner{grid-template-columns:1fr;gap:40px}
  .hero__visual{order:-1}
  .cards{grid-template-columns:1fr}
  .about__grid{grid-template-columns:1fr}
  .nav__links{display:none}
  .plat-card{flex-direction:column;align-items:flex-start}
}
@media (max-width:480px){
  .client-grid{grid-template-columns:repeat(2,1fr)}
}


/* ============================================================
   新增区块：服务流程 / 常见问题（SEO 内容增强）
   ============================================================ */
.process{padding:96px 24px;background:var(--bg)}
.process .steps{
  max-width:1100px;margin:0 auto;display:grid;
  grid-template-columns:repeat(5,1fr);gap:18px;position:relative;
}
.process .step{
  position:relative;padding:26px 20px 22px;border:1px solid var(--border-soft);
  border-radius:var(--r);background:var(--bg-2);
  transition:transform .25s var(--ease),border-color .25s,box-shadow .25s;
}
.process .step:hover{
  transform:translateY(-4px);border-color:var(--border-strong);
  box-shadow:0 14px 40px rgba(118,185,0,.12);
}
.process .step__n{
  width:34px;height:34px;display:flex;align-items:center;justify-content:center;
  border-radius:50%;background:var(--green-soft);border:1px solid var(--border);
  color:var(--green);font-weight:700;font-size:14px;margin-bottom:14px;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,'Liberation Mono',monospace;
}
.process .step h3{font-size:16px;margin-bottom:8px}
.process .step p{color:var(--text-2);font-size:13px;line-height:1.65}

.faq{padding:96px 24px;background:var(--bg-1)}
.faq .faq-list{max-width:820px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq .faq-item{
  border:1px solid var(--border-soft);border-radius:var(--r);
  background:var(--surface);overflow:hidden;
  transition:border-color .2s var(--ease),background .2s;
}
.faq .faq-item:hover{border-color:var(--border)}
.faq .faq-item[open]{border-color:var(--border-strong);background:var(--surface-2)}
.faq .faq-item summary{
  cursor:pointer;list-style:none;padding:18px 20px;font-weight:600;font-size:15px;
  color:var(--text);display:flex;align-items:center;justify-content:space-between;gap:16px;
  transition:color .2s;
}
.faq .faq-item summary::-webkit-details-marker{display:none}
.faq .faq-item summary::after{
  content:'+';flex:none;color:var(--green);font-size:20px;font-weight:700;
  transition:transform .25s var(--ease);
}
.faq .faq-item[open] summary::after{content:'\2212'}
.faq .faq-item summary:hover{color:var(--green-bright)}
.faq .faq-item p{
  padding:0 20px 20px;color:var(--text-2);font-size:14px;line-height:1.75;
  border-top:1px solid var(--border-soft);padding-top:16px;margin-top:2px;
}

@media (max-width:900px){
  .process .steps{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:640px){
  .process{padding:64px 20px}
  .process .steps{grid-template-columns:1fr;gap:12px}
  .process .step{padding:20px 18px}
  .faq{padding:64px 20px}
  .faq .faq-item summary{font-size:14px;padding:16px 16px}
  .faq .faq-item p{font-size:13px;padding:0 16px 16px;padding-top:14px}
}

/* hero 图 WebP 容器：保持与 .hs-img 一致的绝对定位 */
.hs-pic{position:absolute;inset:0;display:block}
/* 业务卡片内链：整卡可点击 + hover 提示 */
.biz-card h3 a{color:inherit;transition:color .2s}
.biz-card:hover h3 a{color:var(--green-bright)}
.biz-card h3 a::after{content:' \2192';opacity:0;transition:opacity .2s;color:var(--green)}
.biz-card:hover h3 a::after{opacity:1}
/* 底部业务内页导航 */
.svc-nav{border-top:1px solid var(--border-soft);background:var(--bg-1);padding:28px 24px}
.svc-nav__inner{max-width:1100px;margin:0 auto;display:flex;flex-wrap:wrap;gap:10px 18px;align-items:center}
.svc-nav__t{color:var(--text-3);font-size:13px;margin-right:6px}
.svc-nav a{color:var(--text-2);font-size:14px;transition:color .2s}
.svc-nav a:hover{color:var(--green-bright)}
@media (max-width:640px){.svc-nav{padding:22px 20px}.svc-nav a{font-size:13px}}


/* ===== ICP 备案号（页脚） ===== */
.foot__beian {
  margin-top: 8px;
  font-size: 13px;
  color: #8a94a6;
}
.foot__beian a {
  color: #8a94a6;
  text-decoration: none;
  transition: color .2s ease;
}
.foot__beian a:hover,
.foot__beian a:focus {
  color: #4c8dff;
  text-decoration: underline;
}