/* ============================================================
   光迪星灿 官网样式
   风格：天蓝 → 海蓝渐变 · 通透明亮 · 暖金点缀（以光为主角）
   ============================================================ */

:root{
  /* 背景：天蓝（上）→ 海蓝（下） */
  --bg:            #DCEEFB;
  --bg-2:          #CDE6F8;
  --surface:       #FFFFFF;
  --surface-2:     #F6FBFF;

  --line:          rgba(18,74,124,.13);
  --line-2:        rgba(18,74,124,.26);

  --text:          #0C2F4A;
  --text-2:        #2F5679;
  --text-3:        #486D90;

  /* 暖金分两档：gold 用于填充/光晕，amber 用于浅底上的文字与线条 */
  --gold:          #E9B872;
  --gold-2:        #F5D6A0;
  --amber:         #8F5C14;
  --amber-2:       #6E4508;
  --amber-dim:     rgba(233,184,114,.16);
  --amber-line:    rgba(174,116,26,.36);

  --sea:           #1B5C8F;
  --sea-deep:      #0C3252;
  --sea-2:         #12456C;

  --shadow-sm:     0 1px 2px rgba(13,58,100,.06), 0 8px 20px -16px rgba(13,58,100,.4);
  --shadow-md:     0 18px 40px -24px rgba(13,58,100,.45);
  --shadow-lg:     0 28px 60px -30px rgba(13,58,100,.5);

  --container: 1200px;
  --radius: 14px;
  --radius-sm: 10px;
  --nav-h: 72px;

  --ease: cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{ box-sizing:border-box; }

html{
  scroll-behavior:smooth;
  scroll-padding-top: var(--nav-h);
  -webkit-text-size-adjust:100%;
}

body{
  margin:0;
  background-color:#D9EDFC;
  background-image:linear-gradient(180deg,
    #E9F4FE 0%,
    #D8ECFB 32%,
    #C6E3F8 64%,
    #B2D7F2 100%);
  background-repeat:no-repeat;
  background-attachment:fixed;
  background-size:cover;
  color:var(--text);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.75;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

img,svg{ display:block; max-width:100%; }
a{ color:inherit; text-decoration:none; }
button{ font:inherit; }
ul{ margin:0; padding:0; list-style:none; }
h1,h2,h3{ margin:0; font-weight:500; line-height:1.28; letter-spacing:.01em; }
p{ margin:0; }

::selection{ background:var(--gold); color:#3A2607; }

.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 28px;
}

.skip-link{
  position:absolute; left:-9999px; top:0; z-index:200;
  background:var(--gold); color:#3A2607; padding:10px 16px; border-radius:0 0 8px 0;
}
.skip-link:focus{ left:0; }

:focus-visible{
  outline:2px solid var(--amber);
  outline-offset:3px;
  border-radius:4px;
}

/* ---------- 通用文字 ---------- */
.eyebrow{
  font-size:12px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--amber);
  margin-bottom:16px;
  font-weight:500;
}

.section{
  padding:clamp(84px,10vw,148px) 0;
  position:relative;
}
.section-alt{
  background:rgba(255,255,255,.52);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}

.section-head{
  max-width:720px;
  margin-bottom:clamp(44px,5vw,68px);
}
.section-head h2{
  font-size:clamp(26px,3.4vw,40px);
}
.section-sub{
  margin-top:18px;
  color:var(--text-2);
  font-size:15.5px;
  max-width:640px;
}

.hint{
  margin-top:clamp(36px,4vw,52px);
  padding-top:22px;
  border-top:1px solid var(--line);
  color:var(--text-3);
  font-size:13.5px;
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:50px;
  padding:0 28px;
  border-radius:999px;
  font-size:15px;
  letter-spacing:.02em;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .3s var(--ease), background .3s var(--ease), border-color .3s var(--ease), color .3s var(--ease), box-shadow .3s var(--ease);
  white-space:nowrap;
}
.btn-primary{
  background:linear-gradient(180deg,#F2C888 0%, #E2A94F 100%);
  color:#3A2607;
  font-weight:500;
  box-shadow:0 8px 20px -10px rgba(178,116,26,.6), inset 0 1px 0 rgba(255,255,255,.55);
}
.btn-primary:hover{
  background:linear-gradient(180deg,#F8D79E 0%, #EBB75F 100%);
  transform:translateY(-2px);
  box-shadow:0 16px 34px -14px rgba(178,116,26,.65), inset 0 1px 0 rgba(255,255,255,.65);
}
.btn-ghost{
  border-color:var(--line-2);
  color:var(--text);
  background:rgba(255,255,255,.62);
}
.btn-ghost:hover{
  border-color:var(--amber-line);
  color:var(--amber);
  background:#fff;
  transform:translateY(-2px);
  box-shadow:var(--shadow-sm);
}
.btn-block{ width:100%; }
.btn:disabled{ opacity:.55; cursor:not-allowed; transform:none; }

/* ============================================================
   导航
   ============================================================ */
.nav{
  position:fixed;
  inset:0 0 auto 0;
  z-index:100;
  height:var(--nav-h);
  display:flex;
  align-items:center;
  transition:background .35s var(--ease), border-color .35s var(--ease), backdrop-filter .35s var(--ease), box-shadow .35s var(--ease);
  border-bottom:1px solid transparent;
}
.nav.is-stuck{
  background:rgba(248,252,255,.86);
  backdrop-filter:saturate(160%) blur(14px);
  border-bottom-color:var(--line);
  box-shadow:0 8px 28px -22px rgba(13,58,100,.55);
}
.nav-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
}

.brand{ display:flex; align-items:center; gap:12px; }
.brand-mark{
  width:3px; height:30px; border-radius:2px;
  background:linear-gradient(180deg,var(--gold-2),var(--gold));
  box-shadow:0 0 16px 1px rgba(233,184,114,.95);
  flex:none;
}
.brand-text{ display:flex; flex-direction:column; line-height:1.25; }
.brand-text strong{ font-size:16px; font-weight:500; letter-spacing:.12em; }
.brand-text em{
  font-style:normal;
  font-size:9.5px;
  letter-spacing:.24em;
  color:var(--text-3);
}

.nav-links{
  display:flex;
  align-items:center;
  gap:34px;
  font-size:14.5px;
  color:var(--text-2);
}
.nav-links a{ transition:color .25s var(--ease); position:relative; }
.nav-links a:hover{ color:var(--text); }
.nav-links a:not(.nav-tel)::after{
  content:"";
  position:absolute; left:0; right:100%; bottom:-6px;
  height:2px; border-radius:2px;
  background:linear-gradient(90deg,var(--gold),var(--amber));
  transition:right .3s var(--ease);
}
.nav-links a:not(.nav-tel):hover::after{ right:0; }
.nav-tel{
  color:var(--amber);
  border:1px solid var(--amber-line);
  background:rgba(255,255,255,.55);
  border-radius:999px;
  padding:8px 18px;
  font-size:14px;
  letter-spacing:.04em;
  transition:background .25s var(--ease), color .25s var(--ease), border-color .25s var(--ease);
}
.nav-tel:hover{ background:var(--amber-dim); color:var(--amber-2); border-color:var(--amber); }

.nav-toggle{
  display:none;
  width:44px; height:44px;
  background:rgba(255,255,255,.6); border:1px solid var(--line-2); border-radius:10px;
  cursor:pointer; position:relative;
}
.nav-toggle span{
  position:absolute; left:13px; right:13px; height:1.5px;
  background:var(--text); border-radius:2px;
  transition:transform .3s var(--ease), opacity .3s var(--ease);
}
.nav-toggle span:nth-child(1){ top:17px; }
.nav-toggle span:nth-child(2){ bottom:17px; }
.nav-toggle[aria-expanded="true"] span:nth-child(1){ transform:translateY(4.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2){ transform:translateY(-4.5px) rotate(-45deg); }

/* ============================================================
   首屏
   ============================================================ */
.hero{
  position:relative;
  min-height:100vh;
  min-height:100svh;
  display:flex;
  flex-direction:column;
  justify-content:flex-start;
  padding-top:var(--nav-h);
  overflow:hidden;
  background:
    radial-gradient(70% 58% at 80% 102%, rgba(233,184,114,.45) 0%, rgba(233,184,114,0) 62%),
    radial-gradient(90% 60% at 10% -12%, rgba(255,255,255,.8) 0%, rgba(255,255,255,0) 58%),
    linear-gradient(180deg,#D3E9FC 0%, #B6DAF6 40%, #8FC3E9 72%, #6FAEDD 100%);
}

.hero-visual{
  position:absolute; inset:0;
  pointer-events:none;
}
.hero-glow{
  position:absolute;
  left:50%; bottom:-14%;
  width:130%; height:62%;
  transform:translateX(-50%);
  background:radial-gradient(50% 50% at 50% 50%, rgba(233,184,114,.42) 0%, rgba(233,184,114,0) 70%);
}
.skyline{
  position:absolute;
  left:0; right:0; bottom:0;
  width:100%;
  height:56%;
}
.hero-fade{
  position:absolute;
  inset:auto 0 0 0;
  height:34%;
  background:linear-gradient(180deg,
    rgba(160,205,238,0) 0%,
    rgba(178,214,242,.55) 55%,
    rgba(219,237,251,.96) 100%);
}

.hero-inner{
  position:relative;
  z-index:2;
  margin-top:auto;
  margin-bottom:auto;
  padding-top:clamp(24px,5vw,56px);
  padding-bottom:clamp(48px,7vw,86px);
}

.hero h1{
  font-size:clamp(32px,6.2vw,68px);
  line-height:1.16;
  letter-spacing:.02em;
  max-width:15em;
  text-wrap:balance;
  color:#08283F;
}
.hero-sub{
  margin-top:26px;
  max-width:620px;
  color:#204B6E;
  font-size:clamp(14.5px,1.5vw,17px);
  line-height:1.85;
}
.hero-actions{
  margin-top:38px;
  display:flex;
  flex-wrap:wrap;
  gap:14px;
}

.hero-foot{
  position:relative;
  z-index:2;
  padding-bottom:34px;
}
.hero-tags{
  display:flex;
  flex-wrap:wrap;
  gap:10px 34px;
  padding-top:22px;
  border-top:1px solid rgba(18,74,124,.2);
  color:#2A5578;
  font-size:13.5px;
  letter-spacing:.08em;
}
.hero-tags li{ position:relative; padding-left:16px; }
.hero-tags li::before{
  content:"";
  position:absolute; left:0; top:50%;
  width:5px; height:5px; margin-top:-2.5px;
  border-radius:50%;
  background:var(--gold);
  box-shadow:0 0 10px 1px rgba(233,184,114,1);
}

/* 建筑灯光动画 */
.skyline .bldg{ fill:rgba(21,78,126,.10); stroke:rgba(21,78,126,.14); stroke-width:1; }
.skyline .lit{ animation:lit 6s ease-in-out infinite; }
@keyframes lit{
  0%,100%{ opacity:.22; }
  50%    { opacity:.85; }
}
.skyline .dot,
#dotGrid .dot{ animation:dotPulse 5.5s ease-in-out infinite; }
@keyframes dotPulse{
  0%,100%{ opacity:var(--o,.5); }
  50%    { opacity:calc(var(--o,.5) * .3); }
}

@media (prefers-reduced-motion: reduce){
  .skyline .lit{ animation:none; opacity:.5; }
  .skyline .dot,
  #dotGrid .dot{ animation:none; }
  html{ scroll-behavior:auto; }
}

/* ============================================================
   产品
   ============================================================ */
.product-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:clamp(20px,2.4vw,30px);
}

.product{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
  overflow:hidden;
  box-shadow:var(--shadow-sm);
  transition:border-color .4s var(--ease), transform .4s var(--ease), box-shadow .4s var(--ease);
}
.product:hover{
  border-color:var(--amber-line);
  transform:translateY(-4px);
  box-shadow:var(--shadow-md);
}
.product-visual{
  position:relative;
  aspect-ratio:2/1;
  overflow:hidden;
  border-bottom:1px solid var(--line);
  background:linear-gradient(180deg,#FBFDFF 0%, #E8F3FC 100%);
}
.product-visual svg{
  width:100%; height:100%;
  transition:transform .8s var(--ease);
}
.product:hover .product-visual svg{ transform:scale(1.04); }

.product-body{ padding:clamp(22px,2.4vw,32px); }
.product-en{
  font-size:11px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--amber);
  margin-bottom:10px;
}
.product-body h3{ font-size:clamp(19px,2vw,23px); }
.product-desc{
  margin-top:12px;
  color:var(--text-2);
  font-size:14.5px;
}
.product-list{
  margin-top:18px;
  padding-top:18px;
  border-top:1px solid var(--line);
  display:flex;
  flex-direction:column;
  gap:9px;
}
.product-list li{
  position:relative;
  padding-left:18px;
  font-size:14px;
  color:var(--text-2);
}
.product-list li::before{
  content:"";
  position:absolute; left:0; top:.72em;
  width:8px; height:1px;
  background:var(--amber);
}

/* ============================================================
   优势
   ============================================================ */
.adv-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:clamp(22px,2.6vw,34px);
}
.adv{
  padding-top:26px;
  border-top:2px solid var(--line);
  transition:border-color .4s var(--ease);
}
.adv:hover{ border-top-color:var(--amber-line); }
.adv-no{
  display:block;
  font-size:12px;
  letter-spacing:.2em;
  color:var(--amber);
  margin-bottom:20px;
}
.adv h3{ font-size:17px; margin-bottom:14px; }
.adv p{ color:var(--text-2); font-size:14.5px; }

/* ============================================================
   关于我们
   ============================================================ */
.about-grid{
  display:grid;
  grid-template-columns:1.35fr .95fr;
  gap:clamp(34px,5vw,72px);
  align-items:start;
}
.about-main h2{ font-size:clamp(26px,3.4vw,40px); margin-bottom:26px; }
.about-main p{ color:var(--text-2); font-size:15.5px; margin-bottom:18px; }
.about-quote{
  margin-top:30px !important;
  padding-left:22px;
  border-left:3px solid var(--gold);
  color:var(--text) !important;
  font-size:16.5px !important;
  line-height:1.9;
}

.about-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow-sm);
  padding:clamp(24px,2.6vw,34px);
}
.about-card dl{ margin:0; display:flex; flex-direction:column; }
.about-card dl > div{
  padding:16px 0;
  border-bottom:1px solid var(--line);
}
.about-card dl > div:first-child{ padding-top:0; }
.about-card dl > div:last-child{ padding-bottom:0; border-bottom:none; }
.about-card dt{
  font-size:12px;
  letter-spacing:.14em;
  color:var(--text-3);
  margin-bottom:6px;
}
.about-card dd{
  margin:0;
  font-size:15px;
  color:var(--text);
  line-height:1.7;
}

/* ============================================================
   联系
   ============================================================ */
.contact-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:clamp(34px,5vw,72px);
  align-items:start;
}
.contact-info h2{ font-size:clamp(26px,3.4vw,40px); margin-bottom:6px; }

.contact-list{
  margin-top:36px;
  display:flex;
  flex-direction:column;
}
.contact-list li{
  display:flex;
  align-items:baseline;
  gap:20px;
  padding:20px 0;
  border-bottom:1px solid var(--line);
}
.contact-list li:first-child{ border-top:1px solid var(--line); }
.ci-label{
  flex:none;
  width:52px;
  font-size:12px;
  letter-spacing:.14em;
  color:var(--text-3);
}
.ci-value{
  font-size:17px;
  color:var(--text);
  letter-spacing:.02em;
  transition:color .25s var(--ease);
}
a.ci-value:hover{ color:var(--amber); }
.ci-muted{ color:var(--text-2); font-size:15.5px; }

.contact-form-wrap{ position:relative; }
.contact-form{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow-md);
  padding:clamp(26px,3vw,38px);
}
.contact-form h3{ font-size:20px; }
.form-note{
  margin-top:8px;
  color:var(--text-3);
  font-size:13.5px;
  margin-bottom:26px;
}
.field{ margin-bottom:18px; }
.field label{
  display:block;
  font-size:13px;
  color:var(--text-2);
  margin-bottom:8px;
  letter-spacing:.04em;
}
.field label i{ color:var(--amber); font-style:normal; }
.field .opt{ color:var(--text-3); font-size:11.5px; margin-left:4px; }

.field input,
.field textarea{
  width:100%;
  background:#FBFDFF;
  border:1px solid var(--line-2);
  border-radius:var(--radius-sm);
  padding:13px 15px;
  color:var(--text);
  font-family:inherit;
  font-size:14.5px;
  line-height:1.6;
  transition:border-color .25s var(--ease), background .25s var(--ease), box-shadow .25s var(--ease);
}
.field textarea{ resize:vertical; min-height:104px; }
.field input::placeholder,
.field textarea::placeholder{ color:#8AA6BE; }
.field input:hover,
.field textarea:hover{ border-color:var(--amber-line); }
.field input:focus,
.field textarea:focus{
  outline:none;
  border-color:var(--amber-line);
  background:#FFFDF8;
  box-shadow:0 0 0 3px rgba(233,184,114,.22);
}
.field.is-error input,
.field.is-error textarea{ border-color:#C4665C; background:#FFF8F7; }

.contact-form .btn{ margin-top:10px; }

.form-status{
  margin-top:16px;
  font-size:13.5px;
  line-height:1.7;
  min-height:1px;
  color:var(--text-3);
  display:none;
}
.form-status.is-shown{ display:block; }
.form-status.ok{ color:#137A4B; }
.form-status.err{ color:#B23A2E; }

/* ============================================================
   页脚 / 悬浮按钮
   ============================================================ */
.footer{
  background:linear-gradient(180deg,#134A73 0%, #0C3252 60%, #092844 100%);
  border-top:none;
  padding:clamp(48px,6vw,72px) 0 30px;
  color:#D7E8F6;
}
.footer-inner{
  display:flex;
  justify-content:space-between;
  align-items:flex-start;
  gap:34px;
  flex-wrap:wrap;
  padding-bottom:34px;
  border-bottom:1px solid rgba(255,255,255,.14);
}
.footer-brand{ display:flex; gap:14px; align-items:flex-start; }
.footer-brand strong{ font-size:15px; font-weight:500; letter-spacing:.04em; display:block; color:#F2F8FD; }
.footer-brand em{
  display:block;
  margin-top:8px;
  font-style:normal;
  font-size:13px;
  color:#8FB2CE;
  letter-spacing:.02em;
}
.footer-links{
  display:flex;
  gap:28px;
  flex-wrap:wrap;
  font-size:14px;
  color:#B9D3E8;
}
.footer-links a:hover{ color:var(--gold-2); }
.footer-bottom{
  padding-top:24px;
  display:flex;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:12.5px;
  color:#7FA3C0;
}

.call-fab{
  position:fixed;
  right:20px; bottom:22px;
  z-index:90;
  width:52px; height:52px;
  border-radius:50%;
  display:none;
  align-items:center;
  justify-content:center;
  background:linear-gradient(180deg,#F2C888,#E2A94F);
  color:#3A2607;
  box-shadow:0 14px 32px -12px rgba(178,116,26,.75);
}

.to-top{
  position:fixed;
  right:20px; bottom:22px;
  z-index:90;
  width:46px; height:46px;
  border-radius:50%;
  display:flex;
  align-items:center;
  justify-content:center;
  background:rgba(255,255,255,.92);
  border:1px solid var(--line-2);
  color:var(--text-2);
  box-shadow:var(--shadow-sm);
  cursor:pointer;
  opacity:0;
  visibility:hidden;
  transform:translateY(10px);
  transition:opacity .35s var(--ease), transform .35s var(--ease), visibility .35s, border-color .25s var(--ease), color .25s var(--ease);
}
.to-top.is-shown{ opacity:1; visibility:visible; transform:none; }
.to-top:hover{ border-color:var(--amber-line); color:var(--amber); }

/* ============================================================
   入场动画
   ============================================================ */
/* 仅在 JS 可用时隐藏，保证不执行 JS 的爬虫仍能读到全部内容（GEO） */
.reveal{ transition:opacity .8s var(--ease), transform .8s var(--ease); }
.js .reveal{ opacity:0; transform:translateY(22px); }
.js .reveal.is-in{ opacity:1; transform:none; }
@media (prefers-reduced-motion: reduce){
  .reveal{ transition:none; }
  .js .reveal{ opacity:1; transform:none; }
}
@media print{
  .js .reveal{ opacity:1 !important; transform:none !important; }
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width:1040px){
  .adv-grid{ grid-template-columns:repeat(2,1fr); gap:32px 28px; }
  .about-grid{ grid-template-columns:1fr; }
}

@media (max-width:900px){
  .product-grid{ grid-template-columns:1fr; }
  .contact-grid{ grid-template-columns:1fr; }
}

@media (max-width:820px){
  :root{ --nav-h:64px; }
  .container{ padding:0 20px; }

  .nav-toggle{ display:block; }
  .nav-links{
    position:fixed;
    top:var(--nav-h); left:0; right:0;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    background:rgba(250,253,255,.97);
    backdrop-filter:blur(16px);
    border-bottom:1px solid var(--line);
    box-shadow:0 20px 40px -28px rgba(13,58,100,.55);
    padding:8px 20px 22px;
    font-size:16px;
    transform:translateY(-12px);
    opacity:0;
    visibility:hidden;
    transition:opacity .3s var(--ease), transform .3s var(--ease), visibility .3s;
  }
  .nav-links.is-open{ opacity:1; visibility:visible; transform:none; }
  .nav-links a{ padding:15px 0; border-bottom:1px solid var(--line); }
  .nav-links a::after{ display:none; }
  .nav-tel{
    margin-top:16px;
    text-align:center;
    border-bottom:none !important;
    padding:13px 18px;
    background:var(--amber-dim);
  }

  .hero-inner{ padding-bottom:52px; }
  .hero-actions .btn{ flex:1 1 auto; }
  .call-fab{ display:flex; }
  .to-top{ right:20px; bottom:86px; }
}

@media (max-width:560px){
  .adv-grid{ grid-template-columns:1fr; gap:28px; }
  .hero-tags{ gap:10px 20px; font-size:12.5px; }
  .about-quote{ font-size:15.5px !important; }
  .contact-list li{ gap:14px; }
  .ci-label{ width:44px; }
  .ci-value{ font-size:15.5px; word-break:break-all; }
}

/* ============================================================
   内页：面包屑 / 页面头
   ============================================================ */
.page-hero{
  position:relative;
  padding:calc(var(--nav-h) + clamp(52px,7vw,88px)) 0 clamp(44px,5.5vw,68px);
  background:
    radial-gradient(70% 130% at 84% 0%, rgba(233,184,114,.3) 0%, rgba(233,184,114,0) 62%),
    radial-gradient(80% 90% at 8% 0%, rgba(255,255,255,.62) 0%, rgba(255,255,255,0) 60%),
    linear-gradient(180deg,#D5EAFB 0%, #A9D2F1 100%);
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.page-hero::after{
  content:"";
  position:absolute; left:0; right:0; bottom:0; height:2px;
  background:linear-gradient(90deg, transparent, rgba(174,116,26,.5), transparent);
}
.page-hero h1{
  font-size:clamp(26px,4.1vw,44px);
  line-height:1.24;
  max-width:24em;
  text-wrap:balance;
  color:#08283F;
}
.page-hero .lead{
  margin-top:20px;
  max-width:780px;
  color:#204B6E;
  font-size:clamp(14.5px,1.5vw,16.5px);
  line-height:1.85;
}
.page-hero .hero-actions{ margin-top:30px; }
.page-hero .eyebrow{ color:var(--amber); }

.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:12.5px;
  color:#4A6E90;
  margin-bottom:22px;
}
.breadcrumb a{ color:#4A6E90; transition:color .25s var(--ease); }
.breadcrumb a:hover{ color:var(--amber); }
.breadcrumb .sep{ opacity:.55; }
.breadcrumb [aria-current="page"]{ color:#204B6E; }

/* ============================================================
   直接回答块（answer-first）
   ============================================================ */
.answer{
  margin-top:clamp(30px,3.6vw,44px);
  padding:clamp(22px,2.6vw,30px) clamp(22px,2.8vw,34px);
  border-left:3px solid var(--gold);
  background:linear-gradient(90deg, rgba(233,184,114,.22), rgba(233,184,114,0));
  border-radius:0 var(--radius-sm) var(--radius-sm) 0;
}
.answer-label{
  font-size:11.5px;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--amber);
  margin-bottom:12px;
  font-weight:500;
}
.answer p{ color:var(--text); font-size:clamp(15px,1.6vw,16.8px); line-height:1.9; }

/* ============================================================
   长文正文
   ============================================================ */
.prose{ max-width:840px; }
.prose h2{
  font-size:clamp(20px,2.5vw,28px);
  margin:clamp(42px,4.6vw,62px) 0 18px;
  line-height:1.34;
}
.prose h2:first-child{ margin-top:0; }
.prose h3{
  font-size:clamp(16.5px,1.8vw,19px);
  margin:30px 0 12px;
  color:var(--text);
}
.prose p{
  color:var(--text-2);
  font-size:15.5px;
  line-height:1.9;
  margin-bottom:16px;
}
.prose strong{ color:var(--text); font-weight:600; }
.prose a{ color:var(--amber); border-bottom:1px solid var(--amber-line); }
.prose a:hover{ border-bottom-color:var(--amber); }
.prose ul,.prose ol{ margin:0 0 20px; padding:0; }
.prose ul li,.prose ol li{
  position:relative;
  padding-left:22px;
  color:var(--text-2);
  font-size:15.5px;
  line-height:1.85;
  margin-bottom:10px;
}
.prose ul li::before{
  content:"";
  position:absolute; left:2px; top:.78em;
  width:8px; height:1px;
  background:var(--amber);
}
.prose ol{ counter-reset:step; }
.prose ol li{ padding-left:34px; counter-increment:step; }
.prose ol li::before{
  content:counter(step);
  position:absolute; left:0; top:.28em;
  width:21px; height:21px;
  border-radius:50%;
  border:1px solid var(--amber-line);
  background:rgba(255,255,255,.8);
  color:var(--amber);
  font-size:11px;
  line-height:19px;
  text-align:center;
  font-weight:500;
}

/* ---------- 表格 ---------- */
.table-wrap{
  margin:26px 0;
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  overflow-x:auto;
  background:var(--surface);
  box-shadow:var(--shadow-sm);
}
.table-wrap table{
  width:100%;
  min-width:540px;
  border-collapse:collapse;
  font-size:14.5px;
}
.table-wrap caption{
  text-align:left;
  padding:15px 20px;
  color:var(--text-3);
  font-size:12.5px;
  letter-spacing:.06em;
  border-bottom:1px solid var(--line);
}
.table-wrap th,
.table-wrap td{
  padding:13px 20px;
  text-align:left;
  border-bottom:1px solid var(--line);
  color:var(--text-2);
  vertical-align:top;
}
.table-wrap th{
  color:var(--text);
  font-weight:600;
  background:#EFF7FE;
  white-space:nowrap;
}
.table-wrap tbody tr:last-child td{ border-bottom:none; }
.table-wrap td strong{ color:var(--amber); font-weight:500; }

/* ---------- 定义列表 ---------- */
.def-list{
  display:grid;
  gap:1px;
  background:var(--line);
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  overflow:hidden;
  margin:26px 0;
  box-shadow:var(--shadow-sm);
}
.def-list > div{ background:var(--surface); padding:20px 24px; }
.def-list dt{ color:var(--text); font-weight:600; font-size:15.5px; margin-bottom:8px; }
.def-list dd{ margin:0; color:var(--text-2); font-size:14.5px; line-height:1.85; }

/* ---------- 常见问题 ---------- */
.faq{ margin-top:clamp(28px,3.4vw,44px); border-top:1px solid var(--line); }
.faq details{ border-bottom:1px solid var(--line); }
.faq summary{
  list-style:none;
  cursor:pointer;
  position:relative;
  padding:23px 48px 23px 0;
  font-size:clamp(15.5px,1.7vw,17px);
  color:var(--text);
  line-height:1.65;
  transition:color .25s var(--ease);
}
.faq summary::-webkit-details-marker{ display:none; }
.faq summary:hover{ color:var(--amber); }
.faq summary::after{
  content:"";
  position:absolute; right:10px; top:32px;
  width:9px; height:9px;
  border-right:1.5px solid var(--amber);
  border-bottom:1.5px solid var(--amber);
  transform:rotate(45deg);
  transition:transform .3s var(--ease);
}
.faq details[open] summary::after{ transform:rotate(-135deg); }
.faq-a{ padding:0 64px 26px 0; color:var(--text-2); font-size:15px; line-height:1.9; }
.faq-a p{ margin-bottom:12px; }
.faq-a p:last-child{ margin-bottom:0; }
.faq-a ul{ margin:0 0 14px; padding:0; }
.faq-a ul li{ position:relative; padding-left:20px; margin-bottom:9px; }
.faq-a ul li::before{
  content:""; position:absolute; left:2px; top:.78em;
  width:8px; height:1px; background:var(--amber);
}

/* ---------- 链接卡片 ---------- */
.link-cards{ display:grid; grid-template-columns:repeat(3,1fr); gap:clamp(18px,2.2vw,26px); }
.link-card{
  display:block;
  padding:clamp(22px,2.4vw,30px);
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:var(--surface);
  box-shadow:var(--shadow-sm);
  transition:border-color .35s var(--ease), transform .35s var(--ease), box-shadow .35s var(--ease);
}
.link-card:hover{ border-color:var(--amber-line); transform:translateY(-3px); box-shadow:var(--shadow-md); }
.link-card strong{ display:block; color:var(--text); font-weight:600; font-size:16.5px; margin-bottom:9px; }
.link-card span{ color:var(--text-2); font-size:14px; line-height:1.8; }

/* ---------- 栅格 ---------- */
.grid-2{ display:grid; grid-template-columns:1fr 1fr; gap:clamp(24px,3vw,44px); align-items:start; }
.grid-3{ display:grid; grid-template-columns:repeat(3,1fr); gap:clamp(20px,2.4vw,30px); }
.grid-aside{ display:grid; grid-template-columns:minmax(0,1fr) 340px; gap:clamp(30px,4vw,60px); align-items:start; }

/* ---------- 底部行动条 ---------- */
.cta-band{
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:clamp(28px,3.6vw,48px);
  background:
    radial-gradient(80% 150% at 88% 18%, rgba(233,184,114,.38), rgba(233,184,114,0) 62%),
    var(--surface);
  box-shadow:var(--shadow-md);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:28px;
  flex-wrap:wrap;
}
.cta-band h2{ font-size:clamp(19px,2.3vw,27px); }
.cta-band p{ margin-top:10px; color:var(--text-2); font-size:15px; max-width:54ch; }
.cta-band .btn{ flex:none; }

/* ---------- 产品页大图 ---------- */
.product-visual-lg{ aspect-ratio:16/7; }
.product-visual-lg svg{ width:100%; height:100%; }

/* ---------- 参数查询卡 ---------- */
.aside-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow-md);
  padding:clamp(22px,2.4vw,30px);
  position:sticky;
  top:calc(var(--nav-h) + 24px);
}
.aside-card h3{ font-size:16.5px; margin-bottom:14px; }
.aside-card p{ color:var(--text-2); font-size:14.5px; margin-bottom:18px; }
.aside-card dl{ margin:0 0 20px; }
.aside-card dl > div{ padding:13px 0; border-bottom:1px solid var(--line); }
.aside-card dt{ font-size:12px; letter-spacing:.14em; color:var(--text-3); margin-bottom:5px; }
.aside-card dd{ margin:0; font-size:14.5px; color:var(--text); }
.aside-card .btn{ width:100%; }

/* ---------- 响应式补充 ---------- */
@media (max-width:1040px){
  .grid-aside{ grid-template-columns:1fr; }
  .aside-card{ position:static; }
  .link-cards{ grid-template-columns:repeat(2,1fr); }
}
@media (max-width:900px){
  .grid-2{ grid-template-columns:1fr; }
  .grid-3{ grid-template-columns:1fr; }
  .cta-band{ flex-direction:column; align-items:flex-start; }
  .cta-band .btn{ width:100%; }
}
@media (max-width:700px){
  .link-cards{ grid-template-columns:1fr; }
  .faq summary{ padding-right:38px; }
  .faq-a{ padding-right:0; }
}

/* ============================================================
   首页标题双行 / 产品卡链接 / 产品大图
   ============================================================ */
.hero h1 .h1-key{
  display:block;
  font-size:.42em;
  font-weight:500;
  letter-spacing:.2em;
  color:var(--amber);
  margin-bottom:18px;
}
.hero h1 .h1-sub{ display:block; }

.product-link{ display:block; color:inherit; }
.product-body h3 a{ color:inherit; transition:color .3s var(--ease); }
.product:hover .product-body h3 a{ color:var(--amber); }

.product-visual-lg{
  aspect-ratio:16/7;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:linear-gradient(180deg,#FBFDFF 0%, #E5F1FB 100%);
  box-shadow:var(--shadow-sm);
}

@media (max-width:700px){
  .hero h1 .h1-key{ font-size:.5em; letter-spacing:.12em; margin-bottom:12px; }
  .product-visual-lg{ aspect-ratio:4/3; }
}

/* ============================================================
   真实素材：首屏照片层 / 产品实物图 / 型号 / 案例 / 工厂图库
   ============================================================ */
.hero-photo{
  position:absolute;
  inset:0;
  background:url("img/hero-lens.webp") center 38% / cover no-repeat;
  opacity:.13;
  filter:saturate(.72) brightness(1.08);
}
.hero-photo::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,
    rgba(214,236,252,.58) 0%,
    rgba(186,218,246,.38) 45%,
    rgba(146,196,234,.78) 100%);
}

.product-photo{
  width:100%;
  height:100%;
  object-fit:contain;
  display:block;
  transition:transform .5s var(--ease);
}
.product:hover .product-visual .product-photo{ transform:scale(1.04); }
.product-visual .product-photo{ background:linear-gradient(180deg,#FBFDFF 0%, #E4F1FB 100%); }
.product-visual-lg .product-photo{ object-fit:contain; padding:clamp(16px,3vw,40px); }

.model-chips{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
}
.chip{
  display:inline-block;
  padding:7px 14px;
  border:1px solid var(--line-2);
  border-radius:999px;
  background:#F2F9FF;
  color:#24506F;
  font-size:13.5px;
  letter-spacing:.02em;
  font-family:ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.case-strip{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:clamp(16px,2vw,24px);
}
.case-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:clamp(18px,2.4vw,30px);
}
.case-card{
  margin:0;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
  overflow:hidden;
  box-shadow:var(--shadow-sm);
  display:flex;
  flex-direction:column;
  transition:border-color .4s var(--ease), transform .4s var(--ease), box-shadow .4s var(--ease);
}
.case-card:hover{ border-color:var(--amber-line); transform:translateY(-3px); box-shadow:var(--shadow-md); }
.case-card video{
  width:100%;
  aspect-ratio:16/9;
  object-fit:cover;
  display:block;
  background:#0C2A45;
}
.case-card figcaption{ padding:18px 20px 20px; }
.case-cat{
  font-size:11.5px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--amber);
  margin-bottom:8px;
}
.case-card h3{ font-size:17px; margin-bottom:8px; }
.case-desc{ color:var(--text-2); font-size:14px; line-height:1.7; margin:0; }

.factory-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:clamp(14px,1.8vw,22px);
}
.factory-item{
  margin:0;
  border:1px solid var(--line);
  border-radius:var(--radius);
  overflow:hidden;
  background:var(--surface);
  box-shadow:var(--shadow-sm);
  position:relative;
}
.factory-item img{
  width:100%;
  aspect-ratio:4/3;
  object-fit:cover;
  display:block;
  transition:transform .5s var(--ease);
}
.factory-item:hover img{ transform:scale(1.03); }
.factory-item figcaption{
  position:absolute;
  left:0; right:0; bottom:0;
  padding:26px 14px 10px;
  font-size:13px;
  color:#EAF4FC;
  background:linear-gradient(180deg, rgba(9,28,46,0) 0%, rgba(9,28,46,.88) 100%);
}
.team-row{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:clamp(14px,1.8vw,22px);
  margin-top:clamp(14px,1.8vw,22px);
}

@media (max-width:1040px){
  .case-strip{ grid-template-columns:repeat(2,1fr); }
  .factory-grid{ grid-template-columns:repeat(2,1fr); }
  .team-row{ grid-template-columns:repeat(2,1fr); }
}
@media (max-width:700px){
  .case-strip{ grid-template-columns:1fr; }
  .case-grid{ grid-template-columns:1fr; }
  .factory-grid{ grid-template-columns:1fr; }
  .team-row{ grid-template-columns:1fr; }
  .model-chips{ gap:8px; }
  .chip{ font-size:12.5px; padding:6px 12px; }
}

/* ============================================================
   首页首屏：实景照片版式（深色夜景 + 浅色内页的对比）
   ============================================================ */
.hero--photo{
  background:linear-gradient(180deg,#0E2540 0%, #0B1F38 100%);
}
.hero-city{
  position:absolute;
  inset:0;
  background:url("img/hero-city.webp") center 45% / cover no-repeat;
}
.hero-city::after{
  content:"";
  position:absolute;
  inset:0;
  background:
    linear-gradient(90deg, rgba(7,24,44,.5) 0%, rgba(7,24,44,.2) 46%, rgba(7,24,44,0) 72%),
    linear-gradient(180deg,
      rgba(7,24,44,.74) 0%,
      rgba(9,32,58,.48) 46%,
      rgba(8,28,50,.62) 100%);
}
.hero--photo h1{ color:#F4F9FE; }
.hero--photo .eyebrow{ color:var(--gold-2); }
.hero--photo h1 .h1-key{ color:var(--gold-2); }
.hero--photo .hero-sub{ color:rgba(219,233,247,.9); }
.hero--photo .hero-tags{
  border-top-color:rgba(255,255,255,.24);
  color:rgba(208,226,243,.88);
}
.hero--photo .btn-ghost{
  color:#F2F8FD;
  border-color:rgba(255,255,255,.55);
  background:rgba(11,31,56,.3);
}
.hero--photo .btn-ghost:hover{
  color:#FFFFFF;
  border-color:var(--gold-2);
  background:rgba(255,255,255,.12);
}
.hero--photo .hero-fade{
  height:24%;
  background:linear-gradient(180deg,
    rgba(220,238,251,0) 0%,
    rgba(206,231,250,.55) 62%,
    #DCEEFB 100%);
}

/* 首页导航：未吸顶时用浅色文字，吸顶后回到浅色玻璃 */
.nav--dark:not(.is-stuck) .brand-text strong{ color:#F2F8FD; }
.nav--dark:not(.is-stuck) .brand-text em{ color:rgba(190,214,236,.78); }
.nav--dark:not(.is-stuck) .nav-links{ color:rgba(224,238,251,.9); }
.nav--dark:not(.is-stuck) .nav-links a:hover{ color:#FFFFFF; }
.nav--dark:not(.is-stuck) .nav-tel{
  color:var(--gold-2);
  border-color:rgba(245,214,160,.55);
  background:rgba(255,255,255,.08);
}
.nav--dark:not(.is-stuck) .nav-tel:hover{
  background:rgba(255,255,255,.16);
  color:#FFFFFF;
}
.nav--dark:not(.is-stuck) .nav-toggle{
  border-color:rgba(255,255,255,.45);
  background:rgba(255,255,255,.08);
}
.nav--dark:not(.is-stuck) .nav-toggle span{ background:#F2F8FD; }
@media (max-width:820px){
  .nav--dark:not(.is-stuck) .nav-links{ color:var(--text-2); }
}
@media (max-width:700px){
  .hero-city{ background-position:center 58%; }
}

/* ============================================================
   导航下拉菜单（产品中心）
   ============================================================ */
.nav-drop{ position:relative; }
.nav-drop > a{ display:inline-flex; align-items:center; gap:6px; }
.drop-caret{
  width:7px; height:7px;
  border-right:1.6px solid currentColor;
  border-bottom:1.6px solid currentColor;
  transform:rotate(45deg) translateY(-2px);
  opacity:.7;
  transition:transform .25s var(--ease);
}
.nav-drop:hover .drop-caret,
.nav-drop:focus-within .drop-caret{ transform:rotate(225deg) translateY(-1px); }

/* hover 桥：面板与触发器之间的空隙不丢失悬停状态 */
.nav-drop::before{
  content:"";
  position:absolute;
  top:100%; left:-8px; right:-8px;
  height:16px;
  display:none;
}
.nav-drop:hover::before,
.nav-drop:focus-within::before{ display:block; }

.drop-panel{
  position:absolute;
  top:100%; left:50%;
  margin-top:14px;
  transform:translate(-50%, 8px);
  min-width:216px;
  padding:8px;
  background:#FFFFFF;
  border:1px solid rgba(140,190,230,.55);
  border-radius:14px;
  box-shadow:0 24px 48px -18px rgba(12,50,82,.35);
  opacity:0;
  visibility:hidden;
  transition:opacity .28s var(--ease), transform .28s var(--ease), visibility .28s;
  z-index:60;
}
.nav-drop:hover .drop-panel,
.nav-drop:focus-within .drop-panel{
  opacity:1;
  visibility:visible;
  transform:translate(-50%, 0);
}
.drop-panel a{
  display:block;
  padding:10px 14px;
  border-radius:9px;
  font-size:13.5px;
  color:var(--text-2);
  white-space:nowrap;
  transition:background .2s var(--ease), color .2s var(--ease);
}
.drop-panel a:hover{
  background:#EEF6FD;
  color:var(--text);
}
.drop-panel a::after{ display:none; }

/* 首页深色导航：面板保持白底，触发器文字随导航变体 */
.nav--dark:not(.is-stuck) .drop-panel{ background:rgba(255,255,255,.98); }

/* 移动端：下拉面板展开为内嵌子菜单 */
@media (max-width:820px){
  .nav-drop::before{ display:none; }
  .nav-drop > a{ padding:15px 0; border-bottom:1px solid var(--line); }
  .drop-panel{
    position:static;
    transform:none;
    margin-top:0;
    min-width:0;
    padding:2px 0 8px 14px;
    background:transparent;
    border:none;
    box-shadow:none;
    opacity:1;
    visibility:visible;
  }
  .drop-panel a{
    padding:10px 0;
    color:var(--text-3);
    font-size:14.5px;
  }
  .drop-panel a::before{
    content:"— ";
    color:var(--gold-2);
  }
}

/* ============================================================
   首屏标签行：保持单行不换行被裁切
   ============================================================ */
.hero-tags{
  flex-wrap:nowrap;
  gap:10px clamp(14px, 2.4vw, 34px);
}
.hero-tags li{ white-space:nowrap; }
.hero-tags{
  font-size:clamp(11.5px, 0.95vw, 13.5px);
  letter-spacing:.06em;
}
@media (max-width:700px){
  .hero-tags{
    flex-wrap:wrap;
    gap:9px 18px;
    font-size:12.5px;
  }
  .hero-foot{ padding-bottom:46px; }
}
  .drop-panel a{ border-bottom:none; }

/* ============================================================
   品牌 Logo（GDXC 光迪星灿）
   ============================================================ */
.brand{ gap:0; }
.brand-logo{
  height:34px;
  width:auto;
  display:block;
  transition:filter .3s var(--ease);
}
/* 首页深色导航未吸顶时：Logo 反白 */
.nav--dark:not(.is-stuck) .brand-logo{
  filter:brightness(0) invert(1);
  opacity:.96;
}
/* 吸顶导航（浅色玻璃）：恢复原色 */
.nav--dark.is-stuck .brand-logo{ filter:none; }

/* 页脚：白色版 Logo 置于描述文字上方 */
.footer-brand{
  flex-direction:column;
  align-items:flex-start;
  gap:0;
}
.footer-logo{
  height:38px;
  width:auto;
  display:block;
}
.footer-brand em{ margin-top:10px; }

@media (max-width:700px){
  .brand-logo{ height:28px; }
  .footer-logo{ height:32px; }
}

/* ============================================================
   案例详情页
   ============================================================ */
.case-more{ margin:12px 0 0; font-size:13.5px; }
.case-more a{ color:var(--amber-2); }
.case-more a:hover{ color:var(--text); }
.case-card-lg{ max-width:980px; margin:0 auto; }
.case-card-lg video{ aspect-ratio:16/9; object-fit:contain; background:#07090C; }
.case-card-lg figcaption{ padding:16px 22px 20px; }