/* ===========================================================
   Synaris 芯辰启源 — 门户网站样式
   无外部依赖，纯原生 CSS
   =========================================================== */

:root{
  --bg:            #070B14;
  --bg-alt:        #0B1220;
  --surface:       rgba(255,255,255,.035);
  --surface-hover: rgba(255,255,255,.06);
  --border:        rgba(255,255,255,.09);
  --border-strong: rgba(255,255,255,.16);
  --text:          #E8EDF6;
  --text-dim:      #96A3BA;
  --text-faint:    #6B7A93;
  --accent:        #38BDF8;
  --accent-2:      #2DD4BF;
  --grad:          linear-gradient(100deg,#38BDF8 0%,#2DD4BF 60%,#A3E635 120%);
  --radius:        14px;
  --radius-lg:     20px;
  --wrap:          1180px;
  --header-h:      72px;
  --shadow:        0 18px 50px -20px rgba(0,0,0,.75);
}

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

html{ scroll-behavior:smooth; scroll-padding-top:calc(var(--header-h) + 16px); -webkit-text-size-adjust:100%; }

body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}

img,svg{ display:block; max-width:100%; }
a{ color:inherit; text-decoration:none; }
h1,h2,h3{ line-height:1.25; margin:0 0 .6em; letter-spacing:-.01em; }
p{ margin:0 0 1em; }
em{ font-style:normal; }
address{ font-style:normal; }
b,strong{ font-weight:600; color:#fff; }

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

.skip-link{
  position:absolute; left:-9999px; top:0; z-index:999;
  background:var(--accent); color:#04121C; padding:10px 16px; border-radius:0 0 8px 0; font-weight:600;
}
.skip-link:focus{ left:0; }

::selection{ background:rgba(56,189,248,.32); }

/* ---------------- Header ---------------- */
.site-header{
  position:fixed; top:0; left:0; right:0; z-index:100;
  height:var(--header-h);
  display:flex; align-items:center;
  transition:background .3s ease, border-color .3s ease, backdrop-filter .3s ease;
  border-bottom:1px solid transparent;
}
.site-header.scrolled{
  background:rgba(7,11,20,.82);
  -webkit-backdrop-filter:blur(14px) saturate(160%);
  backdrop-filter:blur(14px) saturate(160%);
  border-bottom-color:var(--border);
}
.header-inner{ display:flex; align-items:center; justify-content:space-between; gap:24px; }

.brand{ display:flex; align-items:center; gap:11px; flex-shrink:0; }
.brand-mark{ display:grid; place-items:center; filter:drop-shadow(0 4px 14px rgba(56,189,248,.35)); }
.brand-text{ display:flex; flex-direction:column; line-height:1.1; }
.brand-text strong{ font-size:19px; letter-spacing:.06em; font-weight:700; }
.brand-text em{ font-size:11px; color:var(--text-faint); letter-spacing:.34em; margin-top:3px; }

.site-nav{ display:flex; align-items:center; gap:4px; }
.site-nav a{
  position:relative; padding:9px 14px; border-radius:9px;
  font-size:14.5px; color:var(--text-dim);
  transition:color .2s ease, background .2s ease;
}
.site-nav a:hover{ color:var(--text); background:var(--surface); }
.site-nav a::after{
  content:""; position:absolute; left:14px; right:14px; bottom:4px; height:1.5px;
  background:var(--grad); border-radius:2px;
  transform:scaleX(0); transform-origin:left; transition:transform .25s ease;
}
.site-nav a:hover::after{ transform:scaleX(1); }
.nav-cta{
  margin-left:8px; padding:9px 18px !important;
  background:var(--grad); color:#04121C !important; font-weight:600;
  box-shadow:0 8px 24px -10px rgba(56,189,248,.7);
}
.nav-cta::after{ display:none; }
.nav-cta:hover{ filter:brightness(1.08); background:var(--grad) !important; }

.nav-toggle{
  display:none; width:42px; height:42px; padding:0;
  background:var(--surface); border:1px solid var(--border); border-radius:10px;
  cursor:pointer;
}
.nav-toggle span{
  display:block; width:18px; height:1.6px; margin:4px auto;
  background:var(--text); border-radius:2px; transition:transform .28s ease, opacity .2s ease;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1){ transform:translateY(5.6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2){ opacity:0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3){ transform:translateY(-5.6px) rotate(-45deg); }

/* ---------------- Hero ---------------- */
.hero{
  position:relative; overflow:hidden;
  padding:calc(var(--header-h) + 96px) 0 96px;
  min-height:min(92vh,860px);
  display:flex; align-items:center;
}
.hero-bg{ position:absolute; inset:0; z-index:0; pointer-events:none; }
.grid-layer{
  position:absolute; inset:-2px;
  background-image:
    linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:62px 62px;
  mask-image:radial-gradient(ellipse 78% 62% at 50% 34%,#000 12%,transparent 78%);
  -webkit-mask-image:radial-gradient(ellipse 78% 62% at 50% 34%,#000 12%,transparent 78%);
}
.glow{ position:absolute; border-radius:50%; filter:blur(90px); opacity:.5; }
.glow-a{ width:620px; height:620px; top:-220px; left:-140px; background:radial-gradient(circle,#1E6FD9,transparent 68%); }
.glow-b{ width:560px; height:560px; bottom:-260px; right:-120px; background:radial-gradient(circle,#0E9F8E,transparent 68%); }

.hero-inner{ position:relative; z-index:1; }

.eyebrow{
  display:inline-flex; align-items:center; gap:9px;
  padding:7px 15px 7px 12px; margin:0 0 26px;
  background:var(--surface); border:1px solid var(--border); border-radius:100px;
  font-size:13px; color:var(--text-dim); letter-spacing:.04em;
}
.eyebrow .dot{
  width:7px; height:7px; border-radius:50%; background:var(--accent-2);
  box-shadow:0 0 0 0 rgba(45,212,191,.6); animation:pulse 2.4s infinite;
}
@keyframes pulse{
  0%{ box-shadow:0 0 0 0 rgba(45,212,191,.55); }
  70%{ box-shadow:0 0 0 9px rgba(45,212,191,0); }
  100%{ box-shadow:0 0 0 0 rgba(45,212,191,0); }
}

.hero h1{
  font-size:clamp(2.15rem,5.4vw,4rem);
  font-weight:700; letter-spacing:-.022em; margin-bottom:.5em;
}
.grad{
  background:var(--grad);
  -webkit-background-clip:text; background-clip:text;
  -webkit-text-fill-color:transparent; color:transparent;
}

.lede{
  max-width:660px; font-size:clamp(1rem,1.35vw,1.115rem);
  color:var(--text-dim); margin-bottom:38px;
}
.lede b{ color:#CFE6F5; font-weight:600; }

.hero-actions{ display:flex; flex-wrap:wrap; gap:14px; margin-bottom:64px; }

.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  padding:13px 26px; border-radius:11px; border:1px solid transparent;
  font-size:15px; font-weight:600; cursor:pointer; font-family:inherit;
  transition:transform .18s ease, box-shadow .22s ease, background .22s ease, border-color .22s ease, filter .22s ease;
}
.btn-primary{
  background:var(--grad); color:#04121C;
  box-shadow:0 12px 34px -14px rgba(56,189,248,.85);
}
.btn-primary:hover{ transform:translateY(-2px); box-shadow:0 18px 40px -14px rgba(56,189,248,.95); filter:brightness(1.05); }
.btn-ghost{ background:var(--surface); border-color:var(--border-strong); color:var(--text); }
.btn-ghost:hover{ background:var(--surface-hover); border-color:rgba(56,189,248,.5); transform:translateY(-2px); }
.btn-block{ width:100%; }

.hero-stats{
  list-style:none; margin:0; padding:26px 0 0;
  display:grid; grid-template-columns:repeat(4,1fr); gap:20px;
  border-top:1px solid var(--border);
}
.hero-stats li{ display:flex; flex-direction:column; gap:4px; }
.hero-stats b{
  font-size:clamp(1.5rem,3vw,2.1rem); font-weight:700;
  background:var(--grad); -webkit-background-clip:text; background-clip:text;
  -webkit-text-fill-color:transparent; color:transparent;
  font-variant-numeric:tabular-nums;
}
.hero-stats span{ font-size:13px; color:var(--text-faint); }
.hero-stats em{ color:#5A6780; font-size:11.5px; }

/* ---------------- Sections ---------------- */
.section{ padding:104px 0; position:relative; }
.section-alt{ background:var(--bg-alt); border-top:1px solid var(--border); border-bottom:1px solid var(--border); }

.section-head{ max-width:720px; margin-bottom:56px; }
.section-tag{
  display:inline-block; margin:0 0 16px;
  font-size:12.5px; font-weight:600; letter-spacing:.2em; text-transform:uppercase;
  color:var(--accent);
}
.section-tag::before{
  content:""; display:inline-block; width:22px; height:1.5px;
  background:var(--accent); vertical-align:middle; margin-right:10px;
}
.section-head h2,.about-text h2,.contact-grid h2{
  font-size:clamp(1.6rem,3.1vw,2.35rem); font-weight:700;
}
.section-sub{ color:var(--text-dim); font-size:15.5px; margin-bottom:0; }

/* ---------------- Cards ---------------- */
.cards{ display:grid; grid-template-columns:repeat(3,1fr); gap:22px; }
.card{
  position:relative; padding:32px 28px 28px;
  background:var(--surface); border:1px solid var(--border); border-radius:var(--radius-lg);
  transition:transform .28s ease, border-color .28s ease, background .28s ease;
  overflow:hidden;
}
.card::before{
  content:""; position:absolute; inset:0 0 auto 0; height:1.5px;
  background:var(--grad); transform:scaleX(0); transform-origin:left; transition:transform .38s ease;
}
.card:hover{ transform:translateY(-5px); border-color:var(--border-strong); background:var(--surface-hover); }
.card:hover::before{ transform:scaleX(1); }

.card-icon{
  width:50px; height:50px; display:grid; place-items:center; margin-bottom:20px;
  border-radius:13px; color:var(--accent);
  background:linear-gradient(150deg,rgba(56,189,248,.16),rgba(45,212,191,.07));
  border:1px solid rgba(56,189,248,.22);
}
.card h3{ font-size:1.16rem; margin-bottom:.55em; }
.card p{ color:var(--text-dim); font-size:14.6px; }
.card-list{ list-style:none; margin:18px 0 0; padding:0; border-top:1px solid var(--border); padding-top:16px; }
.card-list li{
  position:relative; padding-left:19px; font-size:14px; color:var(--text-faint); margin-bottom:8px;
}
.card-list li::before{
  content:""; position:absolute; left:0; top:.62em;
  width:6px; height:6px; border-radius:50%; background:var(--accent-2); opacity:.85;
}

/* ---------------- Products ---------------- */
.products{ display:grid; grid-template-columns:repeat(3,1fr); gap:22px; }
.product{
  padding:30px 26px; border-radius:var(--radius-lg);
  background:linear-gradient(165deg,rgba(255,255,255,.055),rgba(255,255,255,.018));
  border:1px solid var(--border);
  transition:transform .28s ease, border-color .28s ease;
}
.product:hover{ transform:translateY(-5px); border-color:rgba(56,189,248,.45); }
.product-head{ display:flex; align-items:center; justify-content:space-between; gap:12px; margin-bottom:12px; }
.product-head h3{ font-size:1.14rem; margin:0; }
.tag{
  flex-shrink:0; padding:4px 11px; border-radius:100px;
  font-size:11.5px; font-weight:600; letter-spacing:.04em;
  background:rgba(56,189,248,.16); color:#7DD3FC; border:1px solid rgba(56,189,248,.3);
}
.tag-alt{ background:rgba(45,212,191,.14); color:#5EEAD4; border-color:rgba(45,212,191,.3); }
.tag-soft{ background:rgba(163,230,53,.12); color:#BEF264; border-color:rgba(163,230,53,.28); }
.product p{ color:var(--text-dim); font-size:14.5px; }

.spec{ margin:20px 0 0; padding:16px 0 0; border-top:1px solid var(--border); }
.spec > div{ display:flex; justify-content:space-between; gap:14px; padding:5px 0; font-size:13.6px; }
.spec dt{ color:var(--text-faint); flex-shrink:0; }
.spec dd{ margin:0; color:var(--text); text-align:right; }

/* ---------------- Advantages ---------------- */
.adv-grid{ display:grid; grid-template-columns:repeat(4,1fr); gap:22px; }
.adv{
  padding:28px 24px; border-radius:var(--radius);
  background:var(--surface); border:1px solid var(--border);
  transition:transform .28s ease, background .28s ease;
}
.adv:hover{ transform:translateY(-4px); background:var(--surface-hover); }
.adv-num{
  display:block; font-size:12.5px; font-weight:700; letter-spacing:.14em;
  color:var(--accent); margin-bottom:14px;
}
.adv h3{ font-size:1.06rem; margin-bottom:.45em; }
.adv p{ color:var(--text-dim); font-size:14.2px; margin:0; }

/* ---------------- About ---------------- */
.about-grid{ display:grid; grid-template-columns:1.35fr .95fr; gap:56px; align-items:start; }
.about-text p{ color:var(--text-dim); font-size:15.5px; }

.fact-list{ margin:32px 0 0; padding:0; border-top:1px solid var(--border); }
.fact-list > div{
  display:flex; gap:20px; padding:13px 0; border-bottom:1px solid var(--border);
}
.fact-list dt{ width:110px; flex-shrink:0; color:var(--text-faint); font-size:14px; }
.fact-list dd{ margin:0; font-size:14.6px; color:var(--text); }

.about-panel{
  position:sticky; top:calc(var(--header-h) + 24px);
  padding:32px 28px; border-radius:var(--radius-lg);
  background:linear-gradient(165deg,rgba(56,189,248,.085),rgba(45,212,191,.03));
  border:1px solid rgba(56,189,248,.22);
}
.about-panel h3{ font-size:1.14rem; margin-bottom:.5em; }
.about-panel > p{ color:var(--text-dim); font-size:14.5px; }
.contact-mini{ list-style:none; margin:22px 0; padding:0; }
.contact-mini li{
  display:grid; grid-template-columns:52px 1fr; gap:10px; align-items:baseline;
  padding:11px 0; border-top:1px solid var(--border); font-size:14.3px;
}
.contact-mini li > span{ color:var(--text-faint); font-size:13px; }
.contact-mini a{ color:var(--accent); word-break:break-all; }
.contact-mini a:hover{ text-decoration:underline; }
.ph{
  grid-column:2; font-size:11px; color:#8A6A2F;
  background:rgba(234,179,8,.1); border:1px solid rgba(234,179,8,.22);
  border-radius:5px; padding:1px 7px; justify-self:start;
}

/* ---------------- Contact ---------------- */
.contact-grid{ display:grid; grid-template-columns:1fr 1fr; gap:64px; align-items:start; }
.contact-big{ list-style:none; margin:38px 0 0; padding:0; }
.contact-big li{ display:flex; gap:16px; align-items:flex-start; padding:18px 0; border-top:1px solid var(--border); }
.contact-big .ci{
  flex-shrink:0; width:40px; height:40px; display:grid; place-items:center;
  border-radius:11px; font-size:15px; color:var(--accent);
  background:rgba(56,189,248,.1); border:1px solid rgba(56,189,248,.22);
}
.contact-big b{ display:block; font-size:14px; color:var(--text-faint); font-weight:500; margin-bottom:2px; }
.contact-big a,.contact-big address{ font-size:15.5px; color:var(--text); }
.contact-big a:hover{ color:var(--accent); }

.contact-form{
  padding:34px 30px; border-radius:var(--radius-lg);
  background:var(--surface); border:1px solid var(--border);
}
.field{ margin-bottom:18px; }
.field label{ display:block; font-size:13.5px; color:var(--text-dim); margin-bottom:7px; }
.field label i{ color:var(--accent); }
.field input,.field textarea{
  width:100%; padding:12px 14px; font-family:inherit; font-size:14.8px;
  color:var(--text); background:rgba(0,0,0,.28);
  border:1px solid var(--border); border-radius:10px;
  transition:border-color .2s ease, box-shadow .2s ease;
}
.field textarea{ resize:vertical; min-height:110px; }
.field input::placeholder,.field textarea::placeholder{ color:#4E5B72; }
.field input:focus,.field textarea:focus{
  outline:none; border-color:rgba(56,189,248,.6);
  box-shadow:0 0 0 3px rgba(56,189,248,.13);
}
.field input:user-invalid,.field textarea:user-invalid{ border-color:rgba(248,113,113,.6); }
.form-hint{ margin:14px 0 0; font-size:13.5px; min-height:1.4em; color:var(--text-dim); }
.form-hint.ok{ color:#5EEAD4; }
.form-hint.err{ color:#FCA5A5; }

/* ---------------- Footer ---------------- */
.site-footer{
  border-top:1px solid var(--border); background:#050810;
  padding:52px 0 30px; font-size:14px;
}
.footer-inner{ display:grid; grid-template-columns:auto 1fr auto; gap:36px; align-items:start; }
.footer-brand{ display:flex; flex-direction:column; gap:4px; }
.footer-brand strong{ font-size:17px; letter-spacing:.06em; }
.footer-brand span{ color:var(--text-faint); font-size:13px; }
.footer-nav{ display:flex; flex-wrap:wrap; gap:6px 20px; justify-content:center; }
.footer-nav a{ color:var(--text-dim); font-size:13.6px; }
.footer-nav a:hover{ color:var(--accent); }
.footer-legal{ text-align:right; }
.footer-legal p{ margin:0 0 5px; color:var(--text-faint); font-size:12.8px; }
.icp a{ color:var(--text-faint); }
.icp a:hover{ color:var(--accent); text-decoration:underline; }
.icp .sep{ margin:0 7px; opacity:.5; }

/* ---------------- Reveal animation ---------------- */
.reveal{ opacity:0; transform:translateY(22px); transition:opacity .7s cubic-bezier(.22,.61,.36,1), transform .7s cubic-bezier(.22,.61,.36,1); }
.reveal.in{ opacity:1; transform:none; }

@media (prefers-reduced-motion:reduce){
  html{ scroll-behavior:auto; }
  .reveal{ opacity:1; transform:none; transition:none; }
  .eyebrow .dot{ animation:none; }
  *{ transition-duration:.01ms !important; }
}

/* ---------------- Responsive ---------------- */
@media (max-width:1024px){
  .cards,.products{ grid-template-columns:repeat(2,1fr); }
  .adv-grid{ grid-template-columns:repeat(2,1fr); }
  .about-grid{ grid-template-columns:1fr; gap:44px; }
  .about-panel{ position:static; }
  .contact-grid{ grid-template-columns:1fr; gap:44px; }
  .footer-inner{ grid-template-columns:1fr; gap:26px; text-align:center; }
  .footer-nav{ justify-content:center; }
  .footer-legal{ text-align:center; }
}

@media (max-width:760px){
  :root{ --header-h:64px; }
  .wrap{ padding:0 18px; }
  .section{ padding:76px 0; }
  .hero{ padding:calc(var(--header-h) + 64px) 0 72px; min-height:auto; }
  .hero-stats{ grid-template-columns:repeat(2,1fr); gap:20px 16px; }

  .nav-toggle{ display:block; }
  .site-nav{
    position:fixed; top:var(--header-h); left:0; right:0;
    flex-direction:column; align-items:stretch; gap:2px;
    padding:14px 18px 22px;
    background:rgba(7,11,20,.97);
    -webkit-backdrop-filter:blur(16px); backdrop-filter:blur(16px);
    border-bottom:1px solid var(--border);
    transform:translateY(-12px); opacity:0; visibility:hidden;
    transition:opacity .24s ease, transform .24s ease, visibility .24s;
  }
  .site-nav.open{ transform:none; opacity:1; visibility:visible; }
  .site-nav a{ padding:13px 12px; font-size:16px; }
  .site-nav a::after{ display:none; }
  .nav-cta{ margin:8px 0 0; text-align:center; }

  .cards,.products,.adv-grid{ grid-template-columns:1fr; }
  .hero-actions .btn{ flex:1 1 auto; }
  .contact-form{ padding:26px 20px; }
}