/* =========================================================
   智玑教育 · 信赛通  单页官网样式
   ========================================================= */

:root{
  --ink:        #0B1729;
  --ink-2:      #22334D;
  --muted:      #5B6C86;
  --muted-2:    #7C8BA3;
  --navy:       #12275E;
  --navy-deep:  #0A1533;
  --blue:       #2F6BFF;
  --blue-soft:  #EAF0FF;
  --teal:       #12B3A6;
  --teal-soft:  #E4F7F5;
  --amber:      #F5A524;
  --bg:         #FFFFFF;
  --bg-tint:    #F6F8FC;
  --line:       rgba(14, 33, 68, .10);
  --line-soft:  rgba(14, 33, 68, .06);
  --radius:     18px;
  --radius-lg:  26px;
  --shadow-sm:  0 1px 2px rgba(11,23,41,.05), 0 6px 18px -10px rgba(11,23,41,.18);
  --shadow-md:  0 2px 4px rgba(11,23,41,.04), 0 18px 48px -20px rgba(11,23,41,.28);
  --shadow-lg:  0 30px 80px -34px rgba(11,23,41,.42);
  --ff: "PingFang SC", "HarmonyOS Sans SC", "Hiragino Sans GB",
        "Microsoft YaHei", "Source Han Sans SC", system-ui, -apple-system, sans-serif;
  --mono: "SFMono-Regular", "JetBrains Mono", Consolas, "Liberation Mono", Menlo, monospace;
  --ease: cubic-bezier(.22,.72,.24,1);
}

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

html{ scroll-behavior:smooth; scroll-padding-top:88px; -webkit-text-size-adjust:100%; }

body{
  margin:0;
  font-family:var(--ff);
  color:var(--ink);
  background:var(--bg);
  line-height:1.7;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

img,svg{ display:block; max-width:100%; }
a{ color:inherit; text-decoration:none; }
h1,h2,h3,h4,p,ul,ol,dl,dd{ margin:0; }
ul,ol{ padding:0; list-style:none; }
button{ font-family:inherit; }

::selection{ background:rgba(47,107,255,.16); }

.skip-link{
  position:absolute; left:-9999px; top:0; z-index:200;
  background:var(--navy); color:#fff; padding:12px 20px; border-radius:0 0 10px 0;
}
.skip-link:focus{ left:0; }

/* ---------- 布局 ---------- */
.container{
  width:100%;
  max-width:1200px;
  margin-inline:auto;
  padding-inline:clamp(20px, 4vw, 40px);
}
.container.narrow{ max-width:900px; }
.section{ padding:clamp(64px, 8.5vw, 128px) 0; position:relative; }
.section-tint{ background:var(--bg-tint); }
.section-tint::before{
  content:""; position:absolute; inset:0; pointer-events:none;
  background:radial-gradient(900px 380px at 50% -10%, rgba(47,107,255,.05), transparent 70%);
}

/* ---------- 通用文字 ---------- */
.eyebrow{
  display:inline-flex; align-items:center; gap:9px;
  font-size:13px; font-weight:600; letter-spacing:.12em;
  color:var(--blue); text-transform:uppercase; margin-bottom:18px;
}
.eyebrow .dot{
  width:7px; height:7px; border-radius:50%; background:var(--teal);
  box-shadow:0 0 0 4px rgba(18,179,166,.16);
}
.eyebrow.light{ color:#9DB8FF; }

.h2{
  font-size:clamp(1.65rem, 3.4vw, 2.65rem);
  line-height:1.28;
  letter-spacing:-.02em;
  font-weight:700;
}
.h2.light{ color:#fff; }

.grad{
  background:linear-gradient(100deg, #2F6BFF 0%, #12B3A6 92%);
  -webkit-background-clip:text; background-clip:text;
  -webkit-text-fill-color:transparent; color:transparent;
}

.lead{
  margin-top:20px;
  font-size:clamp(15px, 1.15vw, 16.5px);
  color:var(--muted);
  line-height:1.85;
  max-width:34em;
}
.lead strong{ color:var(--ink-2); font-weight:600; }
.lead.center{ margin-inline:auto; text-align:center; }
.lead.light{ color:rgba(255,255,255,.66); }

.section-head{ text-align:center; margin-bottom:clamp(40px,5vw,64px); }
.section-head .eyebrow{ justify-content:center; }

/* ---------- 顶部导航 ---------- */
.site-header{
  position:fixed; inset:0 0 auto 0; z-index:100;
  transition:background-color .35s var(--ease), box-shadow .35s var(--ease),
             border-color .35s var(--ease), backdrop-filter .35s;
  border-bottom:1px solid transparent;
}
.site-header.scrolled{
  background:rgba(255,255,255,.86);
  backdrop-filter:blur(16px) saturate(150%);
  border-bottom-color:var(--line-soft);
  box-shadow:0 10px 30px -24px rgba(11,23,41,.5);
}
.nav-inner{
  display:flex; align-items:center; justify-content:space-between;
  gap:24px; height:76px;
  transition:height .35s var(--ease);
}
.site-header.scrolled .nav-inner{ height:66px; }

.brand{ display:inline-flex; align-items:center; gap:11px; }
.brand-mark{
  width:38px; height:38px; color:var(--navy);
  display:grid; place-items:center; flex:none;
}
.brand-mark svg{ width:100%; height:100%; }
.brand-mark.small{ width:34px; height:34px; }
.brand-text{ display:flex; flex-direction:column; line-height:1.15; }
.brand-text em{ white-space:nowrap; }
.brand-text strong{ font-size:17px; font-weight:700; letter-spacing:.06em; color:var(--ink); }
.brand-text em{
  font-style:normal; font-size:9.5px; letter-spacing:.24em;
  color:var(--muted-2); font-weight:600; margin-top:3px;
}

.nav-links{ display:flex; align-items:center; gap:4px; }
.nav-links a{
  position:relative; padding:8px 14px; border-radius:9px;
  font-size:14.5px; color:var(--ink-2); font-weight:500;
  transition:color .25s, background-color .25s;
}
.nav-links a::after{
  content:""; position:absolute; left:14px; right:14px; bottom:4px; height:1.5px;
  background:var(--blue); border-radius:2px;
  transform:scaleX(0); transform-origin:left; transition:transform .3s var(--ease);
}
.nav-links a:hover{ color:var(--navy); background:rgba(47,107,255,.05); }
.nav-links a:hover::after,
.nav-links a.active::after{ transform:scaleX(1); }
.nav-links a.active{ color:var(--navy); font-weight:600; }

.nav-actions{ display:flex; align-items:center; gap:12px; }
.nav-phone{
  display:inline-flex; align-items:center; gap:7px;
  font-size:14.5px; font-weight:600; color:var(--navy);
  letter-spacing:.01em; font-variant-numeric:tabular-nums;
  padding:8px 14px; border-radius:999px;
  border:1px solid rgba(18,39,94,.14); background:#fff;
  white-space:nowrap; flex:none;
  transition:border-color .25s, color .25s, box-shadow .25s;
}
.nav-phone svg{ width:14px; height:14px; color:var(--teal); }
.nav-phone a{ transition:color .25s; }
.nav-phone:hover{ border-color:rgba(47,107,255,.4); box-shadow:0 6px 16px -12px rgba(11,23,41,.5); }
.nav-phone:hover a{ color:var(--blue); }
.nav-toggle{
  display:none; width:42px; height:42px; border:1px solid var(--line);
  background:#fff; border-radius:11px; cursor:pointer;
  padding:0; place-items:center; gap:4px;
}
.nav-toggle span{
  display:block; width:17px; height:1.7px; background:var(--ink);
  border-radius:2px; transition:transform .3s var(--ease), opacity .2s;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1){ transform:translateY(5.7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2){ opacity:0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3){ transform:translateY(-5.7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero{
  position:relative;
  padding-top:clamp(112px, 15vh, 168px);
  padding-bottom:clamp(40px, 6vw, 72px);
  overflow:hidden;
}
.hero-bg{ position:absolute; inset:0; z-index:0; pointer-events:none; }
.orb{ position:absolute; border-radius:50%; filter:blur(70px); opacity:.55; }
.orb-1{
  width:620px; height:620px; top:-260px; right:-160px;
  background:radial-gradient(circle, rgba(47,107,255,.30), transparent 66%);
  animation:drift 18s ease-in-out infinite alternate;
}
.orb-2{
  width:520px; height:520px; top:180px; left:-240px;
  background:radial-gradient(circle, rgba(18,179,166,.24), transparent 66%);
  animation:drift 22s ease-in-out infinite alternate-reverse;
}
@keyframes drift{
  from{ transform:translate3d(0,0,0) scale(1); }
  to{ transform:translate3d(-36px, 40px, 0) scale(1.08); }
}
.grid-lines{
  position:absolute; inset:0;
  background-image:
    linear-gradient(to right, rgba(14,33,68,.045) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(14,33,68,.045) 1px, transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(ellipse 78% 62% at 50% 32%, #000 20%, transparent 78%);
  -webkit-mask-image:radial-gradient(ellipse 78% 62% at 50% 32%, #000 20%, transparent 78%);
}

.hero-inner{
  position:relative; z-index:1;
  display:grid; grid-template-columns:1.02fr .98fr;
  gap:clamp(32px, 5vw, 64px); align-items:center;
}
.hero h1{
  font-size:clamp(2.05rem, 3.3vw, 3.35rem);
  line-height:1.26; letter-spacing:-.025em; font-weight:700;
  margin-bottom:22px;
  text-wrap:balance;
}
.hero-lead{
  font-size:clamp(15px, 1.2vw, 16.5px); color:var(--muted);
  line-height:1.9; max-width:31em;
}
.hero-contact{
  display:flex; flex-wrap:wrap; align-items:center; gap:18px;
  margin-top:30px;
}
.hc-item{ display:flex; flex-direction:column; gap:2px; }
.hc-item em{
  font-style:normal; font-size:11.5px; letter-spacing:.1em;
  color:var(--muted-2);
}
.hc-item a{
  font-size:clamp(1.02rem,1.5vw,1.18rem); font-weight:600; color:var(--navy);
  letter-spacing:.01em; font-variant-numeric:tabular-nums;
  transition:color .25s;
}
.hc-item a:hover{ color:var(--blue); }
.hc-divider{ width:1px; height:30px; background:var(--line); }
.hero-tags{
  display:flex; flex-wrap:wrap; gap:8px; margin-top:34px;
  padding-top:26px; border-top:1px dashed var(--line);
}
.hero-tags li{
  font-size:12.5px; font-weight:600; letter-spacing:.06em;
  color:var(--ink-2); padding:6px 13px; border-radius:8px;
  background:#fff; border:1px solid var(--line);
  box-shadow:0 1px 2px rgba(11,23,41,.03);
}

/* Hero 视觉 */
.hero-visual{ position:relative; min-height:440px; display:grid; place-items:center; }
.orbit{ position:absolute; inset:0; display:grid; place-items:center; z-index:0; }
.orbit-ring{
  position:absolute; border-radius:50%;
  border:1px solid rgba(18,39,94,.10);
}
.orbit-ring.r1{ width:430px; height:430px; }
.orbit-ring.r2{ width:330px; height:330px; border-style:dashed; border-color:rgba(18,39,94,.09); }
.orbit-node{
  position:absolute;
  font-size:11.5px; font-weight:700; letter-spacing:.05em;
  color:var(--navy); background:#fff;
  padding:6px 11px; border-radius:999px;
  border:1px solid rgba(18,39,94,.12);
  box-shadow:0 8px 20px -12px rgba(11,23,41,.4);
  animation:floaty 7s ease-in-out infinite;
}
.orbit-node.n1{ top:0; left:4%; }
.orbit-node.n2{ top:38%; left:-5%; animation-delay:-2.4s; }
.orbit-node.n3{ right:-3%; bottom:14%; animation-delay:-4.6s; }
@keyframes floaty{
  0%,100%{ transform:translateY(0); }
  50%{ transform:translateY(-9px); }
}

.code-card{
  position:relative; z-index:2;
  width:min(100%, 452px);
  background:linear-gradient(160deg, #101E38 0%, #0A1526 100%);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-lg), 0 0 0 1px rgba(255,255,255,.06) inset;
  overflow:hidden;
  transform:perspective(1200px) rotateY(-4deg) rotateX(1.5deg);
  animation:cardIn 1s var(--ease) both;
}
@keyframes cardIn{
  from{ opacity:0; transform:perspective(1200px) rotateY(-10deg) translateY(28px); }
  to{ opacity:1; transform:perspective(1200px) rotateY(-4deg) translateY(0); }
}
.code-head{
  display:flex; align-items:center; gap:10px;
  padding:14px 16px; border-bottom:1px solid rgba(255,255,255,.07);
  background:rgba(255,255,255,.02);
}
.dots{ display:inline-flex; gap:5px; }
.dots i{ width:8px; height:8px; border-radius:50%; background:rgba(255,255,255,.22); }
.code-head .file{
  font-family:var(--mono); font-size:11.5px; color:rgba(255,255,255,.5);
  letter-spacing:.04em;
}
.badge-live{
  margin-left:auto; display:inline-flex; align-items:center; gap:6px;
  font-size:10.5px; color:#7FE3D6; letter-spacing:.06em;
  padding:3px 9px; border-radius:999px;
  background:rgba(18,179,166,.12); border:1px solid rgba(18,179,166,.26);
}
.badge-live b{ width:5px; height:5px; border-radius:50%; background:#44D7C0; animation:pulse 1.8s infinite; }
@keyframes pulse{ 0%,100%{ opacity:1; } 50%{ opacity:.25; } }

.code-body{
  margin:0; padding:18px 18px 58px;
  font-family:var(--mono); font-size:12.6px; line-height:1.95;
  color:#C7D4EA; overflow-x:auto;
}
.code-body .ln{
  display:inline-block; width:20px; margin-right:14px;
  color:rgba(255,255,255,.22); text-align:right; user-select:none;
}
.c-key{ color:#7FA6FF; }
.c-str{ color:#8FD9A8; }
.c-num{ color:#F2C879; }
.c-fn{ color:#6FD8EA; }

.ai-bubble{
  position:absolute; left:-14px; bottom:-18px;
  width:min(316px, 84%);
  display:flex; gap:10px;
  background:#fff; border-radius:16px; padding:13px 15px;
  box-shadow:var(--shadow-md), 0 0 0 1px rgba(14,33,68,.05);
  animation:floaty 9s ease-in-out infinite;
}
.ai-avatar{
  flex:none; width:26px; height:26px; border-radius:8px;
  display:grid; place-items:center;
  font-size:10px; font-weight:800; color:#fff; letter-spacing:.02em;
  background:linear-gradient(135deg, #2F6BFF, #12B3A6);
}
.ai-bubble strong{ display:block; font-size:12.5px; margin-bottom:3px; color:var(--ink); }
.ai-bubble p{ font-size:11.8px; line-height:1.6; color:var(--muted); }
.ai-bubble code{
  font-family:var(--mono); font-size:11px; color:var(--navy);
  background:var(--blue-soft); padding:1px 5px; border-radius:4px;
}

.float-card{
  position:absolute; right:-10px; top:8%; z-index:3;
  width:186px; padding:14px 15px;
  background:rgba(255,255,255,.92); backdrop-filter:blur(12px);
  border-radius:16px; border:1px solid var(--line);
  box-shadow:var(--shadow-md);
  animation:floaty 8s ease-in-out infinite; animation-delay:-3s;
}
.fc-head{ display:flex; align-items:center; justify-content:space-between; margin-bottom:11px; }
.fc-head span{ font-size:11.5px; color:var(--muted); font-weight:500; }
.fc-head em{
  font-style:normal; font-size:11px; font-weight:700; color:#0E9C74;
  background:rgba(14,156,116,.1); padding:1px 7px; border-radius:6px;
}
.bars{ display:flex; align-items:flex-end; gap:10px; height:62px; }
.bar{ flex:1; display:flex; flex-direction:column; align-items:center; gap:6px; height:100%; justify-content:flex-end; }
.bar span{ font-size:9.5px; color:var(--muted-2); }
.bar i{
  display:block; width:100%; max-width:16px; height:var(--h);
  border-radius:5px 5px 3px 3px;
  background:linear-gradient(180deg, #2F6BFF, #7FA6FF);
  transform-origin:bottom; animation:grow 1.2s var(--ease) both;
}
.bar:nth-child(2) i{ background:linear-gradient(180deg,#12B3A6,#6FDCD2); }
@keyframes grow{ from{ transform:scaleY(.2); opacity:.3; } to{ transform:scaleY(1); opacity:1; } }

/* 数据条 */
.stat-strip{
  margin-top:clamp(48px, 6vw, 80px);
  display:grid; grid-template-columns:repeat(4, 1fr);
  border-top:1px solid var(--line);
  padding-top:clamp(24px, 3vw, 34px);
  gap:16px;
}
.stat{ display:flex; flex-direction:column; gap:2px; }
.stat strong{
  font-size:clamp(1.6rem, 2.6vw, 2.2rem); font-weight:700; letter-spacing:-.02em;
  background:linear-gradient(120deg, var(--navy), #2F6BFF);
  -webkit-background-clip:text; background-clip:text;
  -webkit-text-fill-color:transparent;
  font-variant-numeric:tabular-nums;
}
.stat span{ font-size:13px; color:var(--muted); letter-spacing:.02em; }

/* ---------- 关于 ---------- */
.split{
  display:grid; grid-template-columns:1.08fr .92fr;
  gap:clamp(36px, 5.5vw, 72px); align-items:start;
}
.value-row{
  display:grid; grid-template-columns:repeat(3, 1fr);
  gap:22px; margin-top:44px;
  padding-top:34px; border-top:1px solid var(--line);
}
.value h4{ font-size:15px; margin:8px 0 6px; font-weight:600; }
.value p{ font-size:13.5px; color:var(--muted); line-height:1.75; }
.v-num{
  font-family:var(--mono); font-size:11.5px; font-weight:700;
  color:var(--blue); letter-spacing:.08em;
}

.about-card{
  background:#fff; border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:26px;
  box-shadow:var(--shadow-md);
  position:sticky; top:100px;
}
.about-card::before{
  content:""; display:block; position:absolute;
  inset:-1px -1px auto -1px; height:3px;
  border-radius:var(--radius-lg) var(--radius-lg) 0 0;
  background:linear-gradient(90deg, var(--blue), var(--teal));
  opacity:.85;
}
.about-card{ position:sticky; }
.ac-head{ display:flex; gap:12px; align-items:flex-start; padding-bottom:20px; border-bottom:1px solid var(--line-soft); }
.ac-head strong{ display:block; font-size:14px; font-weight:600; line-height:1.5; }
.ac-head em{ display:block; font-style:normal; font-size:10.5px; color:var(--muted-2); letter-spacing:.02em; margin-top:4px; }
.ac-list{ margin:6px 0 0; }
.ac-list > div{
  display:flex; justify-content:space-between; gap:16px;
  padding:12px 0; border-bottom:1px dashed var(--line-soft);
  font-size:13.5px;
}
.ac-list > div:last-child{ border-bottom:0; }
.ac-list dt{ color:var(--muted-2); flex:none; }
.ac-list dd{ color:var(--ink-2); font-weight:500; text-align:right; }
.ac-foot{ display:flex; flex-wrap:wrap; gap:7px; margin-top:16px; }
.ac-chip{
  font-size:11.5px; color:var(--navy); background:var(--blue-soft);
  padding:5px 10px; border-radius:7px; font-weight:500;
}

/* ---------- 教学服务 ---------- */
.steps{
  display:grid; grid-template-columns:repeat(5, 1fr); gap:16px;
  margin-bottom:clamp(40px,5vw,60px);
}
.step{
  position:relative; padding:22px 18px;
  background:#fff; border:1px solid var(--line); border-radius:var(--radius);
  transition:transform .35s var(--ease), box-shadow .35s var(--ease);
}
.step:hover{ transform:translateY(-4px); box-shadow:var(--shadow-sm); }
.step-n{
  font-family:var(--mono); font-size:11px; font-weight:700;
  color:var(--blue); letter-spacing:.05em;
  display:block; margin-bottom:12px;
}
.step h3{ font-size:14.5px; font-weight:600; margin-bottom:7px; }
.step p{ font-size:12.5px; color:var(--muted); line-height:1.75; }

.why-grid{ display:grid; grid-template-columns:repeat(3, 1fr); gap:18px; }
.why-card{
  padding:26px 24px; border-radius:var(--radius);
  background:linear-gradient(165deg, #F7F9FE, #FFFFFF 60%);
  border:1px solid var(--line);
  transition:transform .35s var(--ease), box-shadow .35s var(--ease), border-color .35s;
}
.why-card:hover{ transform:translateY(-4px); box-shadow:var(--shadow-md); border-color:rgba(47,107,255,.2); }
.w-tag{
  display:inline-block; font-size:10.5px; font-weight:700; letter-spacing:.1em;
  color:var(--teal); background:var(--teal-soft);
  padding:3px 9px; border-radius:5px; margin-bottom:14px;
}
.why-card h3{ font-size:16px; font-weight:600; margin-bottom:9px; }
.why-card p{ font-size:13.5px; color:var(--muted); line-height:1.82; }

/* ---------- FAQ ---------- */
.faq-list{ border-top:1px solid var(--line); }
.faq{ border-bottom:1px solid var(--line); }
.faq summary{
  list-style:none; cursor:pointer;
  display:flex; align-items:center; gap:16px;
  padding:20px 2px; font-size:15.5px; font-weight:600;
  transition:color .25s;
}
.faq summary::-webkit-details-marker{ display:none; }
.faq summary::after{
  content:""; margin-left:auto; flex:none;
  width:11px; height:11px;
  border-right:1.6px solid var(--muted-2);
  border-bottom:1.6px solid var(--muted-2);
  transform:rotate(45deg) translateY(-2px);
  transition:transform .3s var(--ease), border-color .3s;
}
.faq[open] summary{ color:var(--navy); }
.faq[open] summary::after{ transform:rotate(-135deg) translateY(-3px); border-color:var(--blue); }
.faq summary:hover{ color:var(--blue); }
.faq-body{ padding:0 2px 22px; }
.faq-body p{ font-size:14px; color:var(--muted); line-height:1.9; max-width:60em; }
.faq[open] .faq-body{ animation:fadeDown .4s var(--ease) both; }
@keyframes fadeDown{ from{ opacity:0; transform:translateY(-6px); } to{ opacity:1; transform:none; } }

/* ---------- 联系我们 ---------- */
.contact-section{ padding-bottom:clamp(64px,8vw,110px); }
.contact-grid{
  display:grid; grid-template-columns:1.15fr .85fr;
  gap:clamp(20px,3vw,32px); align-items:start;
}
.contact-main{
  background:linear-gradient(160deg, #0B1734 0%, #12275E 100%);
  border-radius:28px; padding:clamp(26px,3.6vw,42px);
  color:#fff; position:relative; overflow:hidden;
  box-shadow:var(--shadow-md);
  display:grid; gap:2px;
}
.contact-main::before{
  content:""; position:absolute; inset:0; pointer-events:none; opacity:.5;
  background:
    radial-gradient(520px 300px at 88% 6%, rgba(47,107,255,.42), transparent 62%),
    radial-gradient(400px 300px at 4% 100%, rgba(18,179,166,.24), transparent 64%);
}
.contact-main .cc-item{ position:relative; padding:20px 0; border-bottom:1px solid rgba(255,255,255,.09); }
.contact-main .cc-item:first-child{ padding-top:0; }
.contact-main .cc-item:last-child{ border-bottom:0; padding-bottom:0; }
.cc-label{
  display:block; font-size:11.5px; letter-spacing:.12em;
  color:rgba(255,255,255,.5); margin-bottom:7px;
}
.cc-value{
  display:inline-block;
  font-size:clamp(1.35rem,2.4vw,1.75rem); font-weight:600; letter-spacing:.01em;
  color:#fff; line-height:1.35;
  font-variant-numeric:tabular-nums;
  transition:color .25s;
}
.cc-value:hover{ color:#8FB2FF; }
.cc-value.sm{ font-size:clamp(1rem,1.5vw,1.1rem); font-weight:500; }
.contact-main em{
  display:block; font-style:normal; font-size:12px;
  color:rgba(255,255,255,.42); margin-top:6px;
}

.company-card{
  background:#fff; border:1px solid var(--line);
  border-radius:24px; padding:clamp(22px,2.4vw,28px);
  box-shadow:var(--shadow-sm);
}
.company-card h3{
  font-size:13px; letter-spacing:.1em; color:var(--muted-2);
  font-weight:600; margin-bottom:16px;
}
.company-card dl > div{
  display:grid; grid-template-columns:88px 1fr; gap:12px;
  padding:10px 0; border-bottom:1px dashed var(--line-soft);
  font-size:13px;
}
.company-card dl > div:last-child{ border-bottom:0; }
.company-card dt{ color:var(--muted-2); font-size:12.5px; }
.company-card dd{ color:var(--ink-2); line-height:1.6; }
.cc-note{
  margin-top:16px; padding-top:14px; border-top:1px solid var(--line-soft);
  font-size:11.5px; color:var(--muted-2); line-height:1.8;
}

/* ---------- 页脚 ---------- */
.site-footer{
  background:#08122A; color:rgba(255,255,255,.62);
  padding:clamp(44px,5vw,64px) 0 26px;
}
.footer-grid{
  display:grid; grid-template-columns:1.6fr .9fr 1.2fr;
  gap:32px; padding-bottom:36px;
  border-bottom:1px solid rgba(255,255,255,.08);
}
.site-footer .brand-text strong{ color:#fff; }
.site-footer .brand-text em{ color:rgba(255,255,255,.4); }
.site-footer .brand-mark{ color:rgba(255,255,255,.85); }
.f-desc{ margin-top:16px; font-size:13px; line-height:1.8; color:rgba(255,255,255,.46); }
.f-col h4{ font-size:12.5px; color:#fff; letter-spacing:.06em; margin-bottom:14px; font-weight:600; }
.f-col a{
  display:block; font-size:13px; padding:5px 0;
  color:rgba(255,255,255,.56); transition:color .25s, transform .25s;
}
.f-col a:hover{ color:#8FB2FF; transform:translateX(2px); }
.f-contact p{ font-size:13px; padding:4px 0; color:rgba(255,255,255,.56); line-height:1.7; }
.f-contact a:hover{ color:#8FB2FF; }
.footer-bottom{
  display:flex; flex-wrap:wrap; gap:10px 24px; justify-content:space-between;
  padding-top:22px; font-size:12px; color:rgba(255,255,255,.38);
}
.f-icp a{ color:rgba(255,255,255,.38); transition:color .25s; }
.f-icp a:hover{ color:rgba(255,255,255,.7); }

/* ---------- 回到顶部 ---------- */
.to-top{
  position:fixed; right:24px; bottom:26px; z-index:90;
  width:44px; height:44px; border-radius:50%;
  display:grid; place-items:center;
  background:#fff; color:var(--navy);
  border:1px solid var(--line);
  box-shadow:var(--shadow-md); cursor:pointer;
  opacity:0; visibility:hidden; transform:translateY(10px);
  transition:opacity .3s, transform .3s var(--ease), visibility .3s, background-color .25s;
}
.to-top.show{ opacity:1; visibility:visible; transform:none; }
.to-top:hover{ background:var(--navy); color:#fff; border-color:var(--navy); }

/* ---------- 滚动入场 ---------- */
.reveal{
  opacity:0; transform:translateY(22px);
  transition:opacity .8s var(--ease) var(--d,0s), transform .8s var(--ease) var(--d,0s);
}
.reveal.in{ opacity:1; transform:none; }

/* ---------- 响应式 ---------- */
@media (max-width:1080px){
  .nav-links a{ padding:8px 10px; font-size:14px; }
  .steps{ grid-template-columns:repeat(3, 1fr); }
  .footer-grid{ grid-template-columns:1.3fr .9fr 1.2fr; }
}

@media (max-width:900px){
  .nav-toggle{ display:grid; }
  .nav-links{
    position:fixed; inset:76px 0 auto 0;
    flex-direction:column; align-items:stretch; gap:2px;
    background:rgba(255,255,255,.97);
    backdrop-filter:blur(18px);
    padding:14px clamp(20px,4vw,40px) 22px;
    border-bottom:1px solid var(--line);
    box-shadow:0 24px 40px -30px rgba(11,23,41,.5);
    transform:translateY(-12px); opacity:0; pointer-events:none;
    transition:opacity .3s var(--ease), transform .3s var(--ease);
  }
  .nav-links.open{ opacity:1; transform:none; pointer-events:auto; }
  .nav-links a{ padding:12px 8px; font-size:15px; border-bottom:1px solid var(--line-soft); border-radius:0; }
  .nav-links a::after{ display:none; }
  .nav-phone{ padding:6px 10px; font-size:12.5px; gap:5px; }
  .nav-phone svg{ width:12px; height:12px; }

  .hero{ padding-top:110px; }
  .hero-inner{ grid-template-columns:1fr; gap:52px; }
  .hero-visual{ min-height:auto; order:2; }
  .code-card{ transform:none; animation:none; width:100%; max-width:520px; }
  .float-card{ right:-4px; top:-16px; width:168px; }
  .orbit{ display:none; }
  .ai-bubble{ position:relative; left:0; bottom:0; width:100%; margin:0; border-radius:0 0 var(--radius-lg) var(--radius-lg); animation:none; }
  .code-body{ padding-bottom:20px; }

  .stat-strip{ grid-template-columns:repeat(2, 1fr); gap:24px 16px; }
  .split{ grid-template-columns:1fr; }
  .about-card{ position:static; }
  .value-row{ grid-template-columns:1fr; gap:18px; }
  .why-grid{ grid-template-columns:1fr; }
  .contact-grid{ grid-template-columns:1fr; }
  .contact-main{ border-radius:22px; }
  .nav-phone span{ display:none; }

  .footer-grid{ grid-template-columns:1fr 1fr; }
  .f-brand{ grid-column:1 / -1; }
}

@media (max-width:620px){
  body{ font-size:15px; }
  .steps{ grid-template-columns:1fr; }
  .footer-grid{ grid-template-columns:1fr; }
  .footer-bottom{ flex-direction:column; }
  .hero-tags li{ font-size:11.5px; padding:5px 10px; }
  .to-top{ right:16px; bottom:18px; }
}

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  *,*::before,*::after{ animation-duration:.001ms !important; animation-iteration-count:1 !important; transition-duration:.001ms !important; }
  .reveal{ opacity:1; transform:none; }
}