/* Tengo.AI教育 — 全站样式 */

:root {
  --blue:      #1f5eff;
  --blue-deep: #1340c4;
  --blue-soft: #eaf0ff;
  --cyan:      #18c5d4;
  --ink:       #0e1726;
  --text:      #3a4253;
  --muted:     #6b7385;
  --line:      #e6e9f0;
  --bg:        #ffffff;
  --bg-alt:    #f5f7fb;
  --bg-dark:   #0b1530;
  --r:         16px;
  --r-lg:      24px;
  --shadow:    0 10px 40px -12px rgba(20,40,90,.14);
  --shadow-lg: 0 24px 60px -18px rgba(20,40,90,.22);
  --ease:      cubic-bezier(.22,.61,.36,1);
  --max:       1180px;
}

*{ margin:0; padding:0; box-sizing:border-box; }
html{ scroll-behavior:smooth; scroll-padding-top:80px; }
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",
    "Segoe UI",Roboto,sans-serif;
  color:var(--text); background:var(--bg); line-height:1.7;
  -webkit-font-smoothing:antialiased; overflow-x:hidden;
}
a{ color:inherit; text-decoration:none; }

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

h1,h2,h3,h4{ color:var(--ink); font-weight:700; line-height:1.25; letter-spacing:-.01em; }

/* ── 品牌色渐变文字 ── */
.grad-text{
  background:linear-gradient(100deg,var(--blue) 0%,var(--cyan) 100%);
  -webkit-background-clip:text; background-clip:text; -webkit-text-fill-color:transparent;
}

/* ── 线性图标基类 ── */
.ic{
  width:1em; height:1em; display:inline-block; vertical-align:middle; flex-shrink:0;
  fill:none; stroke:currentColor; stroke-width:1.8;
  stroke-linecap:round; stroke-linejoin:round;
}
.art-tag-float .ic{ width:15px; height:15px; }
.dlt-os .ic{ width:14px; height:14px; }

/* ── 标签 / kicker ── */
.kicker{
  display:inline-block; font-size:13px; font-weight:600; letter-spacing:.1em;
  color:var(--blue); background:var(--blue-soft);
  padding:6px 14px; border-radius:100px; margin-bottom:18px;
}
.product-no{
  display:inline-flex; align-items:center; justify-content:center;
  width:52px; height:52px; border-radius:14px; margin-bottom:16px;
  background:linear-gradient(135deg,var(--blue),var(--cyan));
  color:#fff; font-size:20px; font-weight:800;
}

/* ── 按钮 ── */
.btn{
  display:inline-flex; align-items:center; justify-content:center;
  font-size:15px; font-weight:600; padding:13px 28px; border-radius:100px;
  transition:all .25s var(--ease); cursor:pointer; border:none; white-space:nowrap;
}
.btn-lg{ padding:16px 38px; font-size:16px; }
.btn-primary{
  background:linear-gradient(100deg,var(--blue),var(--blue-deep));
  color:#fff; box-shadow:0 8px 24px -8px rgba(31,94,255,.55);
}
.btn-primary:hover{ transform:translateY(-2px); box-shadow:0 14px 30px -8px rgba(31,94,255,.7); }
.btn-ghost{ background:transparent; color:var(--ink); border:1.5px solid var(--line); }
.btn-ghost:hover{ border-color:var(--blue); color:var(--blue); }


/* ════════════════════════════════
   NAVIGATION
════════════════════════════════ */
.site-header{
  position:fixed; top:0; left:0; right:0; z-index:200;
  transition:all .3s var(--ease);
}
.site-header.scrolled{
  background:rgba(255,255,255,.88);
  backdrop-filter:saturate(180%) blur(16px);
  box-shadow:0 1px 0 var(--line);
}

/* 深色 hero（首页照片 + 内页毛玻璃）未滚动时，导航用浅色文字，保证清晰可读 */
.site-header.over-dark:not(.scrolled){
  background:linear-gradient(180deg, rgba(6,12,30,.55) 0%, rgba(6,12,30,.18) 60%, transparent 100%);
}
.site-header.over-dark:not(.scrolled) .brand-name{ color:#fff; text-shadow:0 1px 12px rgba(0,0,0,.35); }
.site-header.over-dark:not(.scrolled) .brand-name em{ color:#bcd2ff; }
.site-header.over-dark:not(.scrolled) .brand-name .brand-dot{ background:var(--cyan); }
.site-header.over-dark:not(.scrolled) .nav-link,
.site-header.over-dark:not(.scrolled) .dropdown-trigger{ color:rgba(255,255,255,.92); }
.site-header.over-dark:not(.scrolled) .nav-link:hover,
.site-header.over-dark:not(.scrolled) .nav-link.active,
.site-header.over-dark:not(.scrolled) .dropdown-trigger:hover{
  color:#fff; background:rgba(255,255,255,.16);
}
.site-header.over-dark:not(.scrolled) .nav-toggle span{ background:#fff; }
.nav-inner{ display:flex; align-items:center; justify-content:space-between; height:72px; }

/* 品牌 Logo */
.brand{ display:flex; align-items:center; gap:10px; }
.brand-mark{ flex-shrink:0; border-radius:9.5px; box-shadow:0 4px 12px -4px rgba(31,94,255,.45); transition:transform .3s var(--ease); }
.brand:hover .brand-mark{ transform:rotate(-6deg) scale(1.05); }
.brand-name{ font-size:21px; font-weight:800; color:var(--ink); letter-spacing:-.02em; line-height:1; display:inline-flex; align-items:center; }
.brand-name em{ font-style:normal; font-weight:700; font-size:21px; color:var(--blue); letter-spacing:-.01em; }
.brand-name .brand-dot{
  display:inline-block; width:5px; height:5px; border-radius:50%; background:var(--blue);
  font-size:0; flex-shrink:0; margin:0 5px 5px 3px; align-self:flex-end;
}

/* nav-links */
.nav-links{ display:flex; align-items:center; gap:6px; }
.nav-link{
  position:relative; font-size:15px; font-weight:500; color:var(--text);
  padding:8px 14px; border-radius:10px; transition:all .2s; cursor:pointer;
  white-space:nowrap;
}
.nav-link:hover,.nav-link.active{ color:var(--blue); background:var(--blue-soft); }

/* 下拉菜单 */
.nav-dropdown{ position:relative; }
/* 透明桥接区：填补 trigger 与面板之间的间隙，避免鼠标移过时下拉消失 */
.nav-dropdown::after{
  content:''; position:absolute; top:100%; left:0; right:0; height:16px;
  display:none;
}
.nav-dropdown:hover::after{ display:block; }
.dropdown-trigger{
  display:flex; align-items:center; gap:5px;
  font-size:15px; font-weight:500; color:var(--text);
  padding:8px 14px; border-radius:10px;
  background:none; border:none; cursor:pointer; transition:all .2s;
}
.dropdown-trigger:hover{ color:var(--blue); background:var(--blue-soft); }
.dropdown-trigger svg{ transition:transform .25s var(--ease); }
.nav-dropdown:hover .dropdown-trigger svg,
.nav-dropdown.open  .dropdown-trigger svg{ transform:rotate(180deg); }

.dropdown-panel{
  position:absolute; top:calc(100% + 8px); left:50%;
  transform:translateX(-50%) translateY(-8px);
  min-width:260px; background:#fff; border-radius:14px;
  border:1px solid var(--line); box-shadow:var(--shadow-lg);
  padding:8px; opacity:0; visibility:hidden;
  transition:all .25s var(--ease); pointer-events:none;
}
.nav-dropdown:hover .dropdown-panel,
.nav-dropdown.open  .dropdown-panel{
  opacity:1; visibility:visible; transform:translateX(-50%) translateY(0);
  pointer-events:auto;
}
.dropdown-item{
  display:flex; align-items:center; gap:14px;
  padding:14px 16px; border-radius:10px;
  transition:background .2s; color:var(--text);
}
.dropdown-item:hover,.dropdown-item.active{ background:var(--blue-soft); }
.di-icon{ flex-shrink:0; color:var(--blue); display:flex; align-items:center; }
.di-text{ display:flex; flex-direction:column; gap:2px; }
.di-text strong{ font-size:14px; font-weight:700; color:var(--ink); display:block; }
.di-text em{ font-size:12px; font-style:normal; color:var(--muted); }

/* 汉堡按钮 */
.nav-toggle{
  display:none; flex-direction:column; gap:5px;
  background:none; border:none; cursor:pointer; padding:6px;
}
.nav-toggle span{ width:24px; height:2px; background:var(--ink); border-radius:2px; transition:all .3s; }
.nav-toggle.open span:nth-child(1){ transform:translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2){ opacity:0; }
.nav-toggle.open span:nth-child(3){ transform:translateY(-7px) rotate(-45deg); }


/* ════════════════════════════════
   PAGE HERO（首页全屏）
════════════════════════════════ */
.hero{
  position:relative; min-height:100vh; display:flex; align-items:center;
  padding:120px 0 80px; overflow:hidden;
  background:radial-gradient(120% 80% at 80% 0%,#eef3ff 0%,#fff 55%);
}
.hero-bg{ position:absolute; inset:0; z-index:0; }
#netCanvas{ width:100%; height:100%; display:block; opacity:.5; }
.hero-inner{ position:relative; z-index:1; max-width:900px; }
.hero-badge{
  display:inline-block; font-size:13px; font-weight:600; letter-spacing:.04em;
  color:var(--blue); border:1px solid #cdddff; background:rgba(255,255,255,.7);
  padding:8px 18px; border-radius:100px; margin-bottom:28px;
}
.hero-title{ font-size:clamp(34px,5.2vw,62px); line-height:1.12; margin-bottom:26px; font-weight:800; }
.hero-desc{ font-size:clamp(16px,1.7vw,19px); color:var(--muted); max-width:680px; margin-bottom:38px; }
.hero-actions{ display:flex; gap:16px; flex-wrap:wrap; margin-bottom:64px; }
.hero-stats{ display:flex; gap:48px; flex-wrap:wrap; }
.stat{ display:flex; flex-direction:column; }
.stat-num{ font-size:clamp(28px,3.8vw,44px); font-weight:800; color:var(--ink); line-height:1; letter-spacing:-.02em; }
.stat-label{ font-size:14px; color:var(--muted); margin-top:8px; }
.hero-scroll{ position:absolute; bottom:30px; left:50%; transform:translateX(-50%); z-index:1; }
.hero-scroll span{
  display:block; width:22px; height:36px; border:2px solid #b9c4dd; border-radius:14px; position:relative;
}
.hero-scroll span::after{
  content:''; position:absolute; top:7px; left:50%; transform:translateX(-50%);
  width:4px; height:8px; background:var(--blue); border-radius:4px;
  animation:scrolldot 1.6s var(--ease) infinite;
}
@keyframes scrolldot{ 0%{opacity:0;top:7px} 40%{opacity:1} 100%{opacity:0;top:18px} }

/* PAGE HEADER（内页） */
.page-hero{
  padding:140px 0 70px;
  background:linear-gradient(120deg,#f0f4ff 0%,#fff 60%);
  border-bottom:1px solid var(--line);
}
.page-hero .kicker{ margin-bottom:14px; }
.page-hero h1{ font-size:clamp(28px,4vw,48px); margin-bottom:18px; }
.page-hero p{ font-size:clamp(15px,1.6vw,18px); color:var(--muted); max-width:680px; }

/* 毛玻璃深色 hero（内页）—— 顶部采用首页同款中性深藏青，自上而下由深到浅，底部融入白色内容区 */
.page-hero.frosted{
  position:relative; overflow:hidden;
  background:linear-gradient(180deg,
    #141e32 0%,
    #1c2740 26%,
    #2c3a59 50%,
    #5a6a8c 74%,
    #b9c5db 90%,
    #ffffff 100%);
  border-bottom:0;
}
.page-hero.frosted::before{
  content:""; position:absolute; inset:0; z-index:0; pointer-events:none;
  background:
    radial-gradient(460px 300px at 18% 0%, rgba(60,86,150,.30), transparent 64%),
    radial-gradient(480px 320px at 92% 14%, rgba(40,120,150,.18), transparent 66%);
  filter:blur(10px);
}
/* 毛玻璃质感层：仅在上方做轻微磨砂叠加，往下渐隐，不再加深底部 */
.page-hero.frosted::after{
  content:""; position:absolute; inset:0; z-index:1; pointer-events:none;
  -webkit-backdrop-filter:blur(12px) saturate(125%);
  backdrop-filter:blur(12px) saturate(125%);
  background:linear-gradient(180deg, rgba(12,18,32,.16) 0%, rgba(12,18,32,.05) 40%, transparent 72%);
  -webkit-mask-image:linear-gradient(180deg,#000 0%,#000 50%,transparent 88%);
  mask-image:linear-gradient(180deg,#000 0%,#000 50%,transparent 88%);
}
.page-hero.frosted .container{ position:relative; z-index:2; }
.page-hero.frosted h1{ color:#fff; }
.page-hero.frosted p{ color:rgba(255,255,255,.85); }
.page-hero.frosted .kicker{
  color:#dcebff; background:rgba(255,255,255,.14);
  border:1px solid rgba(255,255,255,.2);
  -webkit-backdrop-filter:blur(6px); backdrop-filter:blur(6px);
}

/* page-hero with media on the right */
.page-hero-media{ overflow:hidden; }
.page-hero-split{ display:grid; grid-template-columns:1.05fr .95fr; gap:56px; align-items:center; }
.page-hero-split .page-hero-text p{ max-width:560px; }
.page-hero-visual{ position:relative; display:flex; align-items:center; justify-content:center; min-height:300px; }
.page-hero-visual .phv-glow{
  position:absolute; width:78%; height:78%; border-radius:50%;
  background:radial-gradient(circle, rgba(31,94,255,.22), rgba(24,197,212,.12) 45%, transparent 70%);
  filter:blur(8px); z-index:0;
}
.page-hero-visual img{
  position:relative; z-index:1; max-width:300px; width:100%; height:auto; display:block;
  filter:drop-shadow(0 28px 46px rgba(20,40,90,.26));
}
.page-hero-visual-shot img{
  max-width:520px; border-radius:16px;
  border:1px solid rgba(255,255,255,.6);
  box-shadow:0 30px 60px -22px rgba(20,40,90,.4);
  filter:none;
}

/* 两张课件图交叉叠放，节省横向空间 */
.page-hero-stack{ min-height:380px; position:relative; }
.page-hero-stack .phs-img{
  position:absolute; width:78%; max-width:none; height:auto; display:block;
  border-radius:14px; border:3px solid #fff;
  box-shadow:0 26px 54px -20px rgba(20,40,90,.42);
  filter:none; transition:transform .4s var(--ease), box-shadow .4s var(--ease);
}
.page-hero-stack .phs-back{
  z-index:1; top:4%; left:0; transform:rotate(-5deg);
}
.page-hero-stack .phs-front{
  z-index:3; bottom:4%; right:0; transform:rotate(4deg);
}
.page-hero-stack .phs-mid{
  z-index:2; top:20%; left:10%; width:72%; transform:rotate(-1deg);
}
.page-hero-stack:hover .phs-back{ transform:rotate(-7deg) translate(-6px,-4px); }
.page-hero-stack:hover .phs-mid{ transform:rotate(-2deg) translate(-2px,-2px); }
.page-hero-stack:hover .phs-front{ transform:rotate(6deg) translate(6px,4px); }
/* 软件能力三模块 split layout */
.sw-split{ display:grid; grid-template-columns:1fr 1fr; gap:56px; align-items:center; margin-top:0; }
.sw-split.reverse .sw-visual{ order:-1; }
.sw-text .kicker{ display:inline-block; margin-bottom:10px; }
.sw-text h2{ font-size:clamp(20px,2.4vw,28px); margin-bottom:14px; }
.sw-text p{ font-size:15px; color:var(--muted); line-height:1.8; margin-bottom:20px; }
/* steps grid (no arrows) */
.sw-steps{ display:grid; grid-template-columns:1fr 1fr; gap:12px; margin-top:4px; }
.sw-step{
  display:flex; align-items:center; gap:12px;
  background:var(--bg-alt); border:1px solid var(--line); border-radius:12px; padding:12px 14px;
}
.ss-ico{
  width:38px; height:38px; flex-shrink:0; border-radius:10px;
  background:var(--blue-soft); color:var(--blue);
  display:flex; align-items:center; justify-content:center;
}
.ss-ico .ic{ width:20px; height:20px; }
.sw-step .ss-no{ display:block; font-size:10px; font-weight:700; color:var(--blue); letter-spacing:.08em; }
.sw-step strong{ display:block; font-size:14px; color:var(--ink); margin-top:2px; }
/* phones side-by-side */
.phones-pair{ display:flex; gap:14px; align-items:flex-end; justify-content:center; max-width:67%; margin:0 auto; }
.phones-pair img{
  width:calc(50% - 7px); border-radius:18px;
  border:3px solid #fff; box-shadow:0 26px 54px -20px rgba(20,40,90,.42);
}
.phones-pair img:first-child{ transform:rotate(-3deg); margin-bottom:16px; }
.phones-pair img:last-child{ transform:rotate(3deg); }
.sw-visual.tall{ min-height:460px; }
.sw-visual.tall .phs-img{ width:auto; max-height:360px; }
/* model card printer image */
.model-img{ height:160px; border-radius:10px; overflow:hidden; margin-bottom:18px; background:var(--bg-alt); display:flex; align-items:center; justify-content:center; }
.model-img img{ max-height:100%; max-width:100%; object-fit:contain; display:block; }


/* ════════════════════════════════
   TRUST BAR
════════════════════════════════ */
.trust{ padding:36px 0; border-bottom:1px solid var(--line); }
.trust-label{ text-align:center; font-size:13px; letter-spacing:.1em; color:var(--muted); margin-bottom:20px; }
.trust-logos{ display:flex; flex-wrap:wrap; gap:14px 36px; justify-content:center; }
.trust-logos span{ font-size:16px; font-weight:700; color:#9aa3b6; transition:color .2s; cursor:default; }
.trust-logos span:hover{ color:var(--ink); }


/* ════════════════════════════════
   SECTION 通用
════════════════════════════════ */
.section{ padding:96px 0; }
.section-alt{ background:var(--bg-alt); }
.section-dark{ background:var(--bg-dark); color:#c7d0e4; }
.section-head{ max-width:760px; margin:0 auto 52px; text-align:center; }
.section-head h2{ font-size:clamp(24px,3.4vw,38px); margin-bottom:16px; }
.section-head.light h2{ color:#fff; }
.section-lead{ font-size:clamp(15px,1.5vw,18px); color:var(--muted); }
.section-head.light .section-lead{ color:#aab4cc; }


/* ════════════════════════════════
   CARD 系列
════════════════════════════════ */
.card-grid{ display:grid; gap:22px; }
.g4{ grid-template-columns:repeat(4,1fr); }
.g3{ grid-template-columns:repeat(3,1fr); }
.g2{ grid-template-columns:repeat(2,1fr); }

/* 角色卡 */
.role-card{
  background:var(--bg); border:1px solid var(--line); border-radius:var(--r);
  padding:32px 26px; transition:all .3s var(--ease); position:relative; overflow:hidden;
}
.role-card::before{
  content:''; position:absolute; top:0; left:0; right:0; height:3px;
  background:linear-gradient(90deg,var(--blue),var(--cyan));
  transform:scaleX(0); transform-origin:left; transition:transform .35s var(--ease);
}
.role-card:hover{ transform:translateY(-5px); box-shadow:var(--shadow); border-color:transparent; }
.role-card:hover::before{ transform:scaleX(1); }
.role-icon{
  width:48px; height:48px; border-radius:13px; margin-bottom:18px;
  background:linear-gradient(135deg,var(--blue),var(--cyan));
  display:flex; align-items:center; justify-content:center;
  font-size:22px;
}
.role-card h3{ font-size:19px; margin-bottom:10px; }
.role-card p{ font-size:14px; color:var(--muted); }

/* Combo 三件套 */
.combo-card{
  background:var(--bg); border:1px solid var(--line); border-radius:var(--r);
  padding:30px 26px; transition:all .3s var(--ease);
}
.combo-card:hover{ box-shadow:var(--shadow); transform:translateY(-4px); border-color:transparent; }
.combo-card h4{ font-size:19px; margin-bottom:6px; }
.combo-sub{ font-size:13px; font-weight:600; color:var(--blue); margin-bottom:10px; display:block; }
.combo-card p{ font-size:14px; color:var(--muted); }

/* 场景卡 */
.scene-card{
  background:var(--bg); border:1px solid var(--line); border-radius:var(--r);
  padding:32px 28px; transition:all .3s var(--ease);
}
.scene-card:hover{ box-shadow:var(--shadow); transform:translateY(-4px); border-color:transparent; }
.scene-card h4{ font-size:19px; margin-bottom:12px; color:var(--blue-deep); }
.scene-card p{ font-size:14px; color:var(--muted); margin-bottom:16px; }
.tags{ display:flex; flex-wrap:wrap; gap:7px; }
.tags span{ font-size:12px; color:var(--blue); background:var(--blue-soft); padding:5px 11px; border-radius:7px; }

/* section 副标题 */
.section-sub{ font-size:15px; color:var(--muted); line-height:1.7; margin-top:4px; }

/* 左右分栏特性模块（education 页） */
.split-feature{ display:grid; grid-template-columns:1fr 1fr; gap:48px; align-items:center; }
.split-feature.reverse .split-text{ order:2; }
.split-feature.reverse .split-visual{ order:1; }
.split-text h3{ font-size:22px; margin-bottom:14px; }
.split-text > p{ font-size:15px; color:var(--muted); line-height:1.8; margin-bottom:20px; }
.check-list{ list-style:none; display:grid; gap:12px; }
.check-list li{ position:relative; padding-left:28px; font-size:15px; color:var(--text); line-height:1.6; }
.check-list li::before{
  content:''; position:absolute; left:0; top:3px; width:18px; height:18px; border-radius:50%;
  background:var(--blue-soft) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%231f5eff' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M4 12.5l5 5L20 6.5'/%3E%3C/svg%3E") center/11px no-repeat;
}
.split-visual{ display:flex; align-items:center; justify-content:center; }

/* AI Native 底座 stage */
.base-stage{
  position:relative; width:100%; max-width:420px; aspect-ratio:1/.82;
  border:1px solid var(--line); border-radius:var(--r-lg); background:var(--bg-alt);
  display:flex; align-items:center; justify-content:center; overflow:hidden;
}
.bs-core{
  position:relative; z-index:2; padding:18px 26px; border-radius:16px; font-weight:800; color:#fff;
  font-size:18px; background:linear-gradient(120deg,var(--blue),var(--cyan));
  box-shadow:0 14px 34px -10px rgba(31,94,255,.5);
}
.bs-node{
  position:absolute; z-index:1; font-size:13px; font-weight:600; color:var(--blue);
  background:var(--bg); border:1px solid var(--line); padding:8px 14px; border-radius:10px; box-shadow:var(--shadow);
}
.bs-node.bn1{ left:8%; top:16%; } .bs-node.bn2{ right:8%; top:16%; }
.bs-node.bn3{ left:8%; bottom:16%; } .bs-node.bn4{ right:8%; bottom:16%; }

/* Tengo产品图 + 浮动标签 */
.tengo-stage{ position:relative; width:100%; max-width:520px; }
.tengo-stage img{ width:100%; height:auto; display:block; border-radius:14px; box-shadow:0 28px 56px -18px rgba(20,40,90,.38); }
.tengo-tag{
  position:absolute; display:inline-flex; align-items:center; gap:7px;
  background:rgba(255,255,255,.95); backdrop-filter:blur(10px); -webkit-backdrop-filter:blur(10px);
  border:1.5px solid rgba(31,94,255,.2); border-radius:20px;
  padding:6px 13px 6px 8px; font-size:12px; font-weight:700; color:var(--ink);
  box-shadow:0 8px 22px -8px rgba(20,40,90,.28); white-space:nowrap; pointer-events:none;
}
.tt-dot{ width:9px; height:9px; border-radius:50%; flex-shrink:0; display:inline-block; }
.tengo-tag.t1{ top:10%; left:3%;  } .tengo-tag.t1 .tt-dot{ background:var(--blue); }
.tengo-tag.t2{ top:10%; right:3%; } .tengo-tag.t2 .tt-dot{ background:var(--cyan); }
.tengo-tag.t3{ bottom:20%; left:3%;  } .tengo-tag.t3 .tt-dot{ background:#f59e0b; }
.tengo-tag.t4{ bottom:20%; right:3%; } .tengo-tag.t4 .tt-dot{ background:#8b5cf6; }

/* 课件 9 学科网格 */
.ware-grid{
  display:grid; grid-template-columns:repeat(3,1fr); column-gap:10px; row-gap:0;
  max-width:380px; width:100%;
}
.ware-grid span{
  flex-shrink:0; display:flex; align-items:center; justify-content:center; width:100px; aspect-ratio:3/4.2;
  background:var(--bg); border:1px solid var(--line); border-radius:12px;
  font-size:15px; font-weight:600; color:var(--ink); transition:all .25s var(--ease);
}
.ware-grid span:hover{ color:var(--blue); border-color:var(--blue); transform:translateY(-3px); box-shadow:var(--shadow); }
.ware-grid .wc{
  aspect-ratio:1; margin:-6px 0; position:relative; z-index:1;
  border-radius:10px; overflow:hidden; border:3px solid #fff;
  box-shadow:0 4px 14px -5px rgba(20,40,90,.32);
  transition:transform .22s var(--ease), box-shadow .22s var(--ease);
  cursor:pointer;
}
.ware-grid .wc img{ width:100%; height:100%; object-fit:cover; object-position:top center; display:block; }
.ware-grid .wc:hover{ transform:scale(1.45); z-index:10; box-shadow:0 20px 40px -12px rgba(20,40,90,.5); }

/* 政策卡 */
.policy-card{
  background:var(--bg); border:1px solid var(--line); border-radius:var(--r);
  padding:32px 28px; transition:all .3s var(--ease);
}
.policy-card:hover{ box-shadow:var(--shadow); transform:translateY(-4px); }
.policy-no{ font-size:36px; font-weight:800; color:var(--blue-soft); line-height:1; display:block; margin-bottom:12px; }
.policy-card h3{ font-size:18px; margin-bottom:10px; }
.policy-card p{ font-size:14px; color:var(--muted); }

/* 案例卡 */
.case-card{
  background:var(--bg); border:1px solid var(--line); border-radius:var(--r);
  padding:30px 26px; transition:all .3s var(--ease); overflow:hidden; position:relative;
}
.case-card::after{
  content:''; position:absolute; right:-20px; bottom:-20px; width:100px; height:100px;
  background:radial-gradient(circle,var(--blue-soft),transparent 70%); opacity:.8;
}
.case-card:hover{ transform:translateY(-4px); box-shadow:var(--shadow); }
.case-school{ font-size:19px; font-weight:700; margin-bottom:4px; }
.case-class{ font-size:13px; color:var(--muted); margin-bottom:18px; }
.case-score{ display:flex; align-items:center; gap:8px; flex-wrap:wrap; }
.case-score span{ font-size:13px; }
.case-score em{ font-style:normal; font-size:20px; font-weight:800; color:var(--blue); margin-left:auto; }
.case-more{ text-align:center; font-size:14px; color:var(--muted); max-width:860px; margin:24px auto 0; }

/* 定价卡 */
.price-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:22px; align-items:stretch; }
.price-card{
  background:var(--bg); border:1px solid var(--line); border-radius:var(--r-lg);
  padding:36px 30px; display:flex; flex-direction:column; transition:all .3s var(--ease); position:relative;
}
.price-card:hover{ box-shadow:var(--shadow); transform:translateY(-4px); }
.price-card.featured{ border-color:var(--blue); box-shadow:0 16px 50px -18px rgba(31,94,255,.42); transform:scale(1.03); }
.price-card.featured:hover{ transform:scale(1.03) translateY(-4px); }
.price-badge{
  position:absolute; top:-12px; left:50%; transform:translateX(-50%);
  background:linear-gradient(100deg,var(--blue),var(--cyan)); color:#fff;
  font-size:12px; font-weight:700; padding:4px 16px; border-radius:100px;
}
.price-head{ border-bottom:1px solid var(--line); padding-bottom:20px; margin-bottom:20px; }
.price-head h3{ font-size:20px; margin-bottom:4px; }
.price-aud{ font-size:13px; color:var(--blue); font-weight:600; }
.price-list{ list-style:none; flex:1; margin-bottom:20px; }
.price-list li{ font-size:14px; color:var(--muted); padding:8px 0 8px 22px; position:relative; }
.price-list li::before{
  content:''; position:absolute; left:0; top:14px;
  width:12px; height:7px; border-left:2px solid var(--blue); border-bottom:2px solid var(--blue);
  transform:rotate(-45deg);
}
.price-tag{ padding-top:16px; border-top:1px solid var(--line); }
.price-tag strong{ display:block; font-size:28px; font-weight:800; color:var(--ink); line-height:1.1; }
.price-tag span{ font-size:12px; color:var(--muted); }


/* ════════════════════════════════
   流程步骤
════════════════════════════════ */
.flow{ display:flex; align-items:center; justify-content:center; flex-wrap:wrap; gap:8px; margin-bottom:52px; }
.flow-step{
  background:var(--bg); border:1px solid var(--line); border-radius:var(--r);
  padding:20px 26px; text-align:center; min-width:148px; transition:all .3s var(--ease);
}
.flow-step:hover{ box-shadow:var(--shadow); border-color:var(--blue); }
.flow-no{ font-size:11px; font-weight:700; color:var(--blue); letter-spacing:.08em; }
.flow-step h4{ font-size:16px; margin-top:7px; }
.flow-arrow{ width:32px; height:2px; background:var(--line); position:relative; }
.flow-arrow::after{
  content:''; position:absolute; right:-1px; top:50%; transform:translateY(-50%);
  border-left:7px solid var(--line); border-top:5px solid transparent; border-bottom:5px solid transparent;
}

/* ════════════════════════════════
   硬件型号对比
════════════════════════════════ */
.model-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:22px; margin-bottom:52px; }
.model-card{
  background:var(--bg); border:1px solid var(--line); border-radius:var(--r);
  padding:30px 26px; transition:all .3s var(--ease);
}
.model-card.featured{ border-color:var(--blue); box-shadow:0 12px 40px -14px rgba(31,94,255,.38); position:relative; }
.model-card.featured::before{
  content:'热门'; position:absolute; top:16px; right:16px;
  font-size:11px; font-weight:700; color:#fff;
  background:linear-gradient(100deg,var(--blue),var(--cyan));
  padding:3px 10px; border-radius:100px;
}
.model-card:hover{ transform:translateY(-4px); box-shadow:var(--shadow-lg); }
.model-card h4{ font-size:17px; margin-bottom:16px; }
.model-card h4 span{ color:var(--blue); font-weight:800; }
.model-card ul{ list-style:none; }
.model-card li{
  font-size:13px; color:var(--muted); padding:8px 0 8px 18px;
  border-bottom:1px dashed var(--line); position:relative;
}
.model-card li:last-child{ border-bottom:none; }
.model-card li::before{
  content:''; position:absolute; left:0; top:15px; width:7px; height:7px;
  border-radius:50%; background:var(--cyan);
}

/* ════════════════════════════════
   价值数据条（蓝色渐变）
════════════════════════════════ */
.value-strip{
  display:grid; grid-template-columns:repeat(4,1fr);
  background:linear-gradient(100deg,var(--blue),var(--blue-deep));
  border-radius:var(--r-lg); padding:38px 16px; box-shadow:var(--shadow-lg);
}
.value-item{ text-align:center; padding:0 14px; border-right:1px solid rgba(255,255,255,.18); }
.value-item:last-child{ border-right:none; }
.value-num{ display:block; font-size:clamp(26px,3.6vw,40px); font-weight:800; color:#fff; line-height:1; }
.value-item>span:last-child{ font-size:13px; color:rgba(255,255,255,.85); margin-top:8px; display:block; }

/* ════════════════════════════════
   闭环（深色背景）
════════════════════════════════ */
.loop-grid{
  display:grid; grid-template-columns:repeat(4,1fr); gap:18px; margin-bottom:44px;
}
.loop-node{
  text-align:center; padding:28px 16px;
  background:rgba(255,255,255,.04); border:1px solid rgba(255,255,255,.1);
  border-radius:var(--r); transition:all .3s var(--ease);
}
.loop-node:hover{ background:rgba(31,94,255,.16); border-color:var(--blue); transform:translateY(-4px); }
.loop-letter{
  display:inline-flex; align-items:center; justify-content:center;
  width:54px; height:54px; border-radius:50%; margin-bottom:14px;
  background:linear-gradient(135deg,var(--blue),var(--cyan));
  color:#fff; font-size:22px; font-weight:800;
}
.loop-node p{ font-size:13px; color:#aab4cc; }
.loop-values{ display:grid; grid-template-columns:repeat(4,1fr); gap:16px; }
.lv{ padding:20px; background:rgba(255,255,255,.04); border-radius:var(--r); border:1px solid rgba(255,255,255,.08); }
.lv strong{ display:block; font-size:16px; color:#fff; margin-bottom:7px; }
.lv span{ font-size:12px; color:#8b96b0; }

/* ════════════════════════════════
   架构堆栈
════════════════════════════════ */
.arch-stack{ display:flex; flex-direction:column; gap:12px; }
.arch-layer{
  display:flex; align-items:center; gap:22px;
  background:var(--bg); border:1px solid var(--line); border-radius:var(--r);
  padding:20px 24px; transition:all .3s var(--ease);
}
.arch-layer:hover{ box-shadow:var(--shadow); transform:translateX(4px); }
.arch-base{ background:linear-gradient(100deg,#11203f,#1a2d54); border-color:transparent; }
.arch-base .arch-tag{ color:#fff; background:rgba(255,255,255,.12); }
.arch-base .arch-items span{ color:#c7d4ef; background:rgba(255,255,255,.07); border-color:rgba(255,255,255,.1); }
.arch-tag{
  flex:0 0 144px; font-size:13px; font-weight:700; color:var(--blue);
  background:var(--blue-soft); padding:8px 12px; border-radius:10px; text-align:center;
}
.arch-items{ display:flex; flex-wrap:wrap; gap:8px; }
.arch-items span{
  font-size:13px; color:var(--text); background:var(--bg-alt);
  padding:6px 12px; border-radius:7px; border:1px solid var(--line);
}

/* ════════════════════════════════
   下载中心
════════════════════════════════ */
.dl-list{ max-width:760px; margin:0 auto; padding:0 24px; }
.dl-row{
  display:flex; align-items:center; gap:24px;
  background:var(--bg); border:1px solid var(--line); border-radius:var(--r);
  padding:26px 28px; margin-bottom:18px; transition:all .3s var(--ease);
}
.dl-row:hover{ box-shadow:var(--shadow); border-color:transparent; transform:translateY(-2px); }
.dl-row-os{
  width:58px; height:58px; flex-shrink:0; border-radius:14px;
  display:flex; align-items:center; justify-content:center;
  background:var(--blue-soft); color:var(--blue);
}
.dl-row-os.mac{ background:#eef0f4; color:#1d2330; }
.dl-row-os svg{ width:30px; height:30px; }
.dl-row-body{ flex:1; min-width:0; }
.dl-row-body h3{ font-size:18px; font-weight:700; margin-bottom:6px; display:flex; align-items:center; gap:10px; flex-wrap:wrap; }
.dl-tag{ font-size:11px; font-weight:700; letter-spacing:.06em; color:var(--blue); background:var(--blue-soft); padding:3px 9px; border-radius:6px; }
.dl-row-body > p{ font-size:13px; color:var(--muted); margin-bottom:10px; }
.dl-specs{ display:flex; flex-wrap:wrap; gap:6px 18px; list-style:none; margin:0; padding:0; }
.dl-specs li{ position:relative; font-size:12.5px; color:var(--muted); padding-left:16px; }
.dl-specs li::before{ content:""; position:absolute; left:0; top:6px; width:6px; height:6px; border-radius:50%; background:var(--cyan); }
.dl-row .dl-btn{ flex-shrink:0; }
.dl-support{ text-align:center; font-size:14px; color:var(--muted); margin-top:36px; }
.dl-support a{ color:var(--blue); }
.dl-btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  font-size:14px; font-weight:600; color:#fff;
  background:linear-gradient(100deg,var(--blue),var(--blue-deep));
  padding:11px 22px; border-radius:100px; transition:all .25s var(--ease);
  box-shadow:0 6px 18px -8px rgba(31,94,255,.55);
}
.dl-btn:hover{ transform:translateY(-2px); box-shadow:0 10px 24px -8px rgba(31,94,255,.7); }
.dl-btn svg{ width:16px; height:16px; flex-shrink:0; }

/* ════════════════════════════════
   资讯页
════════════════════════════════ */
.news-featured{
  display:grid; grid-template-columns:1fr 1fr; gap:0;
  background:var(--bg); border:1px solid var(--line); border-radius:var(--r-lg);
  overflow:hidden; margin-bottom:52px; box-shadow:var(--shadow);
}
.news-featured-img{
  background:linear-gradient(135deg,var(--blue-deep),var(--blue),var(--cyan));
  display:flex; align-items:center; justify-content:center; padding:48px;
  min-height:300px;
}
.news-featured-img .badge-big{
  font-size:clamp(48px,6vw,80px); font-weight:900; color:rgba(255,255,255,.2);
  letter-spacing:-.03em; text-align:center; line-height:1;
}
.news-featured-body{ padding:44px 40px; display:flex; flex-direction:column; justify-content:center; }
.news-tag{ font-size:12px; font-weight:700; letter-spacing:.1em; color:var(--blue); background:var(--blue-soft); padding:5px 12px; border-radius:100px; display:inline-block; margin-bottom:14px; }
.news-featured-body h2{ font-size:clamp(20px,2.4vw,28px); margin-bottom:14px; }
.news-featured-body p{ font-size:15px; color:var(--muted); margin-bottom:22px; line-height:1.8; }
.news-meta{ font-size:13px; color:var(--muted); margin-top:auto; }

.news-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:20px; }
.news-card{
  background:var(--bg); border:1px solid var(--line); border-radius:var(--r);
  overflow:hidden; transition:all .3s var(--ease);
}
.news-card:hover{ transform:translateY(-5px); box-shadow:var(--shadow); border-color:transparent; }
.news-card-img{
  height:140px; display:flex; align-items:center; justify-content:center; font-size:40px;
}
.news-card-body{ padding:22px 20px; }
.news-card-body .news-tag{ margin-bottom:10px; }
.news-card-body h3{ font-size:16px; margin-bottom:8px; line-height:1.4; }
.news-card-body p{ font-size:13px; color:var(--muted); margin-bottom:12px; }
.news-card-body time{ font-size:12px; color:var(--muted); }


/* ════════════════════════════════
   愿景 / CTA
════════════════════════════════ */
.vision{ background:radial-gradient(120% 90% at 50% 0%,#eef3ff 0%,#fff 60%); }
.vision-inner{ max-width:860px; margin:0 auto; text-align:center; }
.vision-inner h2{ font-size:clamp(26px,3.8vw,42px); margin-bottom:20px; }
.vision-lead{ font-size:clamp(16px,1.8vw,19px); color:var(--muted); max-width:660px; margin:0 auto 44px; }
.vision-cols{ display:grid; grid-template-columns:1fr 1fr; gap:20px; text-align:left; }
.vision-col{ background:var(--bg); border:1px solid var(--line); border-radius:var(--r); padding:28px 26px; transition:all .3s var(--ease); }
.vision-col:hover{ box-shadow:var(--shadow); }
.vision-col h4{ font-size:17px; margin-bottom:9px; }
.vision-col p{ font-size:14px; color:var(--muted); }

.cta-section{
  padding:88px 0; text-align:center;
  background:linear-gradient(115deg,var(--blue-deep),var(--blue) 50%,var(--cyan) 130%);
  position:relative; overflow:hidden;
}
.cta-section::before{
  content:''; position:absolute; inset:0;
  background:radial-gradient(60% 60% at 80% 20%,rgba(255,255,255,.16),transparent);
}
.cta-inner{ position:relative; }
.cta-inner h2{ font-size:clamp(24px,3.4vw,38px); color:#fff; margin-bottom:14px; }
.cta-inner p{ font-size:17px; color:rgba(255,255,255,.9); margin-bottom:32px; }
.cta-section .btn-primary{ background:#fff; color:var(--blue-deep); box-shadow:0 10px 28px -8px rgba(0,0,0,.28); }
.cta-section .btn-ghost{ color:#fff; border-color:rgba(255,255,255,.5); }
.cta-section .btn-ghost:hover{ border-color:#fff; background:rgba(255,255,255,.12); }
.cta-actions{ display:flex; gap:14px; justify-content:center; flex-wrap:wrap; margin-bottom:28px; }
.cta-meta{ display:flex; gap:22px; justify-content:center; flex-wrap:wrap; }
.cta-meta span{ font-size:13px; color:rgba(255,255,255,.8); }


/* ════════════════════════════════
   FOOTER（3列）
════════════════════════════════ */
.site-footer{ background:var(--bg-dark); color:#8b96b0; padding-top:60px; }
.footer-inner{ display:grid; grid-template-columns:1.2fr 1fr 1.4fr; gap:48px; padding-bottom:48px; }

.footer-logo{ display:flex; align-items:center; gap:10px; margin-bottom:14px; }
.footer-logo-name{ font-size:20px; font-weight:800; color:#fff; letter-spacing:-.02em; display:inline-flex; align-items:center; }
.footer-logo-name em{ font-style:normal; font-size:20px; font-weight:700; color:#7fa5ff; }
.footer-logo-name .brand-dot{
  display:inline-block; width:5px; height:5px; border-radius:50%; background:#7fa5ff;
  font-size:0; flex-shrink:0; margin:0 5px 5px 3px; align-self:flex-end;
}
.footer-tagline{ font-size:14px; line-height:1.7; margin-bottom:20px; }
.footer-contact{ display:flex; flex-direction:column; gap:8px; font-size:13px; }
.footer-contact span{ color:#8b96b0; }
.footer-contact span i{ color:#aab4cc; font-style:normal; }
.footer-contact a{ color:#8b96b0; transition:color .2s; }
.footer-contact a:hover{ color:#fff; }

.footer-col-nav h5{ font-size:13px; font-weight:700; letter-spacing:.08em; color:#fff; text-transform:uppercase; margin-bottom:14px; margin-top:0; }
.footer-col-nav h5+h5{ margin-top:24px; }
.footer-col-nav a{ display:block; font-size:14px; color:#8b96b0; padding:5px 0; transition:color .2s; }
.footer-col-nav a:hover{ color:#fff; }

/* 社媒二维码 */
.footer-col-social h5{ font-size:13px; font-weight:700; letter-spacing:.08em; color:#fff; text-transform:uppercase; margin-bottom:20px; }
.social-qrs{ display:flex; gap:16px; flex-wrap:wrap; }
.qr-item{ display:flex; flex-direction:column; align-items:center; gap:8px; }
.qr-wrap{
  width:80px; height:80px; background:#fff; border-radius:10px;
  padding:8px; position:relative; overflow:hidden;
  display:flex; align-items:center; justify-content:center;
  transition:all .3s var(--ease);
}
.qr-wrap:hover{ transform:scale(1.08); box-shadow:0 8px 24px -8px rgba(31,94,255,.55); }
.qr-svg{ width:100%; height:100%; color:var(--bg-dark); }
.qr-hint{
  position:absolute; inset:0; background:rgba(31,94,255,.85);
  color:#fff; font-size:11px; font-weight:600;
  display:flex; align-items:center; justify-content:center;
  opacity:0; transition:opacity .25s; border-radius:10px;
}
.qr-wrap:hover .qr-hint{ opacity:1; }
.qr-label{ font-size:12px; color:#8b96b0; }

.footer-bottom{ border-top:1px solid rgba(255,255,255,.07); padding:22px 0; }
.footer-bottom .container{ font-size:13px; color:#4a5568; text-align:center; }


/* ════════════════════════════════
   信任条（首页主产品入口）
════════════════════════════════ */
.product-cards{ display:grid; grid-template-columns:1fr 1fr; gap:24px; margin-bottom:64px; }
.product-entry{
  position:relative; border-radius:var(--r-lg); overflow:hidden;
  background:var(--bg); border:1px solid var(--line);
  padding:40px 36px 36px; transition:all .3s var(--ease);
  display:flex; flex-direction:column;
}
.product-entry:hover{ box-shadow:var(--shadow-lg); transform:translateY(-5px); border-color:transparent; }
.product-entry-no{
  font-size:11px; font-weight:700; letter-spacing:.1em; color:var(--blue);
  background:var(--blue-soft); padding:5px 12px; border-radius:100px;
  display:inline-block; margin-bottom:20px;
}
.product-entry h2{ font-size:clamp(20px,2.2vw,26px); margin-bottom:12px; }
.product-entry p{ font-size:15px; color:var(--muted); margin-bottom:24px; flex:1; }
.product-entry .btn-ghost{ align-self:flex-start; }
.product-entry-accent{
  position:absolute; right:0; top:0; width:180px; height:180px;
  background:radial-gradient(circle at 100% 0%,var(--blue-soft),transparent 70%);
  opacity:.8; pointer-events:none;
}


/* ════════════════════════════════
   滚动揭示动画
════════════════════════════════ */
.reveal{ opacity:0; transform:translateY(26px); transition:opacity .65s var(--ease),transform .65s var(--ease); }
.reveal.in{ opacity:1; transform:none; }
/* PLACEHOLDER_NEW_STYLES */

/* ════════════════════════════════
   HERO 升级（split 布局 + 浮动可视化）
════════════════════════════════ */
.hero-pro{
  position:relative; min-height:100vh; display:flex; flex-direction:column; justify-content:center;
  padding:120px 0 70px; overflow:hidden;
  background:
    radial-gradient(60% 50% at 78% 28%, rgba(24,197,212,.16), transparent 60%),
    radial-gradient(70% 60% at 12% 8%, rgba(31,94,255,.14), transparent 55%),
    linear-gradient(180deg,#f7f9ff 0%,#fff 70%);
}
.hero-pro .hero-bg{ position:absolute; inset:0; z-index:0; }
.hero-pro #netCanvas{ width:100%; height:100%; opacity:.4; }

/* 教室背景图模式 */
.hero-photo-mode{ background:#0b1530; }
.hero-photo-bg{ position:absolute; inset:0; z-index:0; overflow:hidden; }
.hero-photo-bg img{
  width:100%; height:100%; object-fit:cover; display:block;
  transform-origin:60% 45%; animation:roomBreathe 18s ease-in-out infinite;
}
.hero-photo-scrim{
  position:absolute; inset:0; z-index:1; pointer-events:none;
  background:
    linear-gradient(90deg, rgba(8,16,38,.86) 0%, rgba(8,16,38,.68) 38%, rgba(8,16,38,.28) 70%, rgba(8,16,38,.12) 100%),
    linear-gradient(180deg, rgba(8,16,38,.5) 0%, transparent 30%, transparent 70%, rgba(8,16,38,.55) 100%);
}
.hero-orb{
  position:absolute; border-radius:50%; filter:blur(60px); z-index:0; pointer-events:none;
}
.hero-orb.o1{ width:380px; height:380px; right:-60px; top:6%; background:rgba(31,94,255,.22); animation:floaty 9s var(--ease) infinite; }
.hero-orb.o2{ width:300px; height:300px; left:-40px; bottom:4%; background:rgba(24,197,212,.2); animation:floaty 11s var(--ease) infinite reverse; }

.hero-split{ position:relative; z-index:1; display:grid; grid-template-columns:1.05fr .95fr; gap:48px; align-items:stretch; }
.hero-split.single{ display:block; }
.hero-split.single .hero-col-text{ max-width:780px; }
.hero-photo-mode .hero-h1{ color:#fff; }
.hero-photo-mode .hero-sub{ color:rgba(255,255,255,.82); }
.hero-photo-mode .hero-h1 .grad-text{
  background:linear-gradient(100deg,#7db4ff,#5fe6f2); -webkit-background-clip:text;
  background-clip:text; color:transparent;
}
.hero-col-text{ max-width:600px; display:flex; flex-direction:column; justify-content:center; }
.hero-eyebrow{
  display:inline-flex; align-items:center; gap:8px; font-size:13px; font-weight:600;
  letter-spacing:.03em; color:var(--blue-deep);
  background:rgba(255,255,255,.7); border:1px solid #cdddff; backdrop-filter:blur(8px);
  padding:8px 16px; border-radius:100px; margin-bottom:26px;
}
.hero-eyebrow .dot{ width:7px; height:7px; border-radius:50%; background:#22c55e; box-shadow:0 0 0 4px rgba(34,197,94,.18); }
.hero-h1{ font-size:clamp(36px,4.6vw,55px); line-height:1.45; font-weight:800; letter-spacing:-.02em; margin-bottom:24px; }
.hero-h1 .grad-text{ display:inline-block; }
.hero-sub{ font-size:clamp(16px,1.6vw,18px); color:var(--muted); max-width:540px; margin-bottom:36px; line-height:1.75; }
.hero-cta-row{ display:flex; gap:14px; flex-wrap:wrap; margin-bottom:48px; }
.hero-metrics{ display:flex; gap:40px; flex-wrap:wrap; }
.hero-metric{ display:flex; flex-direction:column; }
.hero-metric b{ font-size:clamp(26px,3.4vw,40px); font-weight:800; color:var(--ink); line-height:1; letter-spacing:-.02em; }
.hero-metric span{ font-size:13px; color:var(--muted); margin-top:8px; }

/* 右侧浮动可视化 */
.hero-col-visual{ position:relative; display:flex; align-items:center; }
.hv-card{
  position:absolute; background:rgba(255,255,255,.85); backdrop-filter:blur(14px);
  border:1px solid rgba(255,255,255,.9); border-radius:18px;
  box-shadow:0 20px 50px -18px rgba(20,40,90,.28); padding:20px 22px;
}
.hv-main{
  top:50%; left:50%; transform:translate(-50%,-50%); width:300px; z-index:3;
  animation:floaty 6s var(--ease) infinite;
}
.hv-main .hv-head{ display:flex; align-items:center; justify-content:space-between; margin-bottom:16px; }
.hv-chip{ font-size:12px; font-weight:700; color:#fff; background:linear-gradient(100deg,var(--blue),var(--cyan)); padding:4px 11px; border-radius:100px; display:inline-flex; align-items:center; gap:6px; }
.hv-chip .pulse{ width:6px; height:6px; border-radius:50%; background:#fff; animation:pulse 1.4s infinite; }
.hv-time{ font-size:12px; color:var(--muted); }
.hv-bar-track{ height:8px; border-radius:8px; background:#eaf0ff; overflow:hidden; margin-bottom:10px; }
.hv-bar-fill{ height:100%; width:73%; border-radius:8px; background:linear-gradient(90deg,var(--blue),var(--cyan)); animation:fill 2.2s var(--ease) forwards; }
.hv-bar-label{ font-size:13px; color:var(--text); }
.hv-bar-label b{ color:var(--blue-deep); }
.hv-rows{ margin-top:16px; display:flex; flex-direction:column; gap:9px; }
.hv-row{ display:flex; align-items:center; justify-content:space-between; font-size:13px; color:var(--muted); }
.hv-dots{ letter-spacing:2px; color:var(--cyan); }
.hv-float{ z-index:4; }
.hv-f1{ top:8%; right:-6px; animation:floaty 7s var(--ease) infinite; }
.hv-f2{ bottom:12%; left:-14px; animation:floaty 8s var(--ease) infinite reverse; }
.hv-f3{ bottom:-2%; right:18%; animation:floaty 6.5s var(--ease) .4s infinite; }
.hv-float .hv-num{ font-size:24px; font-weight:800; color:var(--ink); line-height:1; }
.hv-float .hv-num .up{ color:#22c55e; font-size:15px; }
.hv-float span{ font-size:12px; color:var(--muted); display:block; margin-top:5px; }
.hv-float .hv-ico{ font-size:20px; margin-bottom:8px; }

@keyframes floaty{ 0%,100%{ transform:translateY(0) } 50%{ transform:translateY(-14px) } }
.hv-main{ animation-name:floaty-center; }
@keyframes floaty-center{ 0%,100%{ transform:translate(-50%,-50%) } 50%{ transform:translate(-50%,calc(-50% - 12px)) } }
@keyframes pulse{ 0%,100%{ opacity:1 } 50%{ opacity:.3 } }
@keyframes fill{ from{ width:0 } to{ width:73% } }

/* ════════════════════════════════
   产品独立展示区（全宽 · 交替布局）
════════════════════════════════ */
.showcase{ padding:96px 0; overflow:hidden; }
.showcase-inner{ display:grid; grid-template-columns:1fr 1fr; gap:64px; align-items:stretch; }
.showcase.reverse .showcase-text{ order:2; }
.showcase.reverse .showcase-art{ order:1; }
.showcase-text{ display:flex; flex-direction:column; justify-content:center; }
.showcase-text .product-no{ margin-bottom:18px; }
.showcase-text h2{ font-size:clamp(24px,3vw,36px); margin-bottom:16px; letter-spacing:-.02em; }
.showcase-text .lead{ font-size:16px; color:var(--muted); margin-bottom:24px; line-height:1.75; }
.showcase-feats{ list-style:none; margin-bottom:28px; display:grid; gap:14px; }
.showcase-feats li{ display:flex; gap:12px; align-items:flex-start; font-size:15px; color:var(--text); }
.showcase-feats .fi{
  flex-shrink:0; width:26px; height:26px; border-radius:8px; margin-top:1px;
  background:var(--blue-soft); color:var(--blue); display:flex; align-items:center; justify-content:center;
}
.showcase-feats .fi .ic{ width:15px; height:15px; stroke-width:2.4; }
.showcase-ctas{ display:flex; gap:12px; flex-wrap:wrap; }
.showcase-ctas.mod-cta{ justify-content:center; margin-top:36px; }

/* 产品可视化卡 */
.showcase-art{ position:relative; }
.art-frame{
  position:relative; border-radius:var(--r-lg); padding:30px;
  background:linear-gradient(150deg,#f0f5ff,#e6fbff); border:1px solid var(--line);
  box-shadow:var(--shadow); overflow:hidden;
}
.art-frame::after{
  content:''; position:absolute; right:-40px; top:-40px; width:160px; height:160px;
  background:radial-gradient(circle,rgba(31,94,255,.16),transparent 70%);
}
/* 批阅可视化 */
.art-paper{
  background:#fff; border-radius:14px; padding:22px; box-shadow:0 12px 30px -12px rgba(20,40,90,.2);
  position:relative; z-index:1;
}
.art-paper-head{ display:flex; align-items:center; justify-content:space-between; margin-bottom:18px; padding-bottom:14px; border-bottom:1px dashed var(--line); }
.art-paper-head .t{ font-size:14px; font-weight:700; color:var(--ink); }
.art-score{ font-size:34px; font-weight:800; color:var(--blue); line-height:1; }
.art-score small{ font-size:14px; color:var(--muted); font-weight:500; }
.art-line{ display:flex; align-items:center; gap:10px; margin-bottom:12px; }
.art-line .subj{ font-size:13px; color:var(--text); width:48px; }
.art-line .track{ flex:1; height:7px; border-radius:7px; background:#eef2f9; overflow:hidden; }
.art-line .fill{ height:100%; border-radius:7px; background:linear-gradient(90deg,var(--blue),var(--cyan)); }
.art-line .pct{ font-size:12px; color:var(--muted); width:34px; text-align:right; }
.art-tag-float{
  position:absolute; z-index:2; background:#fff; border-radius:12px; padding:10px 14px;
  box-shadow:0 14px 30px -12px rgba(20,40,90,.28); font-size:13px; font-weight:600;
  display:flex; align-items:center; gap:8px;
}
.art-tag-float.tf1{ top:14px; right:8px; color:#22c55e; }
.art-tag-float.tf2{ bottom:10px; left:6px; color:var(--blue); }
/* 批阅一体机：照片 + 三型号说明 */
.printer-stage{
  position:relative; border-radius:var(--r-lg); padding:26px;
  background:linear-gradient(150deg,#f0f5ff,#e6fbff); border:1px solid var(--line);
  box-shadow:var(--shadow); overflow:hidden;
  display:grid; grid-template-columns:auto 1fr; gap:24px; align-items:center;
}
.printer-stage::after{
  content:''; position:absolute; right:-40px; top:-40px; width:160px; height:160px;
  background:radial-gradient(circle,rgba(31,94,255,.16),transparent 70%);
}
.printer-photo{
  position:relative; width:150px; flex-shrink:0; z-index:1;
}
.printer-photo img{ width:100%; height:auto; display:block; filter:drop-shadow(0 18px 30px rgba(20,40,90,.22)); }
.printer-glow{
  position:absolute; left:50%; bottom:-6px; transform:translateX(-50%);
  width:78%; height:16px; border-radius:50%;
  background:radial-gradient(ellipse,rgba(31,94,255,.28),transparent 70%); filter:blur(3px);
}
.printer-models{ position:relative; z-index:1; display:flex; flex-direction:column; gap:12px; }
.pm-row{
  background:#fff; border:1px solid var(--line); border-radius:13px; padding:14px 16px;
  transition:all .25s var(--ease);
}
.pm-row.featured{ border-color:var(--blue); box-shadow:0 10px 26px -14px rgba(31,94,255,.4); }
.pm-row:hover{ box-shadow:var(--shadow); transform:translateX(3px); }
.pm-head{ display:flex; align-items:baseline; justify-content:space-between; gap:10px; margin-bottom:8px; }
.pm-name{ font-size:14px; font-weight:800; color:var(--ink); white-space:nowrap; }
.pm-name b{ color:var(--blue); }
.pm-use{ font-size:12px; color:var(--blue); font-weight:600; white-space:nowrap; }
.pm-spec{ display:flex; flex-wrap:nowrap; gap:6px; }
.pm-spec span{ font-size:11px; color:var(--muted); background:var(--bg-alt); border:1px solid var(--line); padding:3px 8px; border-radius:7px; white-space:nowrap; }
/* 龙虾平台 app 网格 */
.art-apps{ display:grid; grid-template-columns:repeat(3,1fr); gap:14px; position:relative; z-index:1; }
.art-app{
  background:#fff; border-radius:14px; padding:18px 12px; text-align:center;
  box-shadow:0 10px 24px -14px rgba(20,40,90,.22); transition:transform .3s var(--ease);
}
.art-app:hover{ transform:translateY(-5px); }
.art-app .ico{ display:flex; align-items:center; justify-content:center; margin-bottom:8px; color:var(--blue); }
.art-app .ico .ic{ width:26px; height:26px; }
.art-app .nm{ font-size:12px; color:var(--text); font-weight:600; }

/* ════════════════════════════════
   首页下载引导区
════════════════════════════════ */
.dl-teaser{
  background:linear-gradient(120deg,#0b1530 0%,#142654 60%,#0e2a52 100%);
  position:relative; overflow:hidden;
}
.dl-teaser::before{
  content:''; position:absolute; inset:0;
  background:radial-gradient(50% 60% at 85% 15%,rgba(31,94,255,.35),transparent 60%),
             radial-gradient(40% 50% at 10% 90%,rgba(24,197,212,.25),transparent 60%);
}
.dl-teaser-inner{ position:relative; display:block; }
.dl-teaser-text{ max-width:680px; margin:0 auto 34px; text-align:center; }
.dl-teaser-text h2{ font-size:clamp(24px,3vw,36px); color:#fff; margin-bottom:14px; letter-spacing:-.02em; }
.dl-teaser-text p{ font-size:16px; color:#aab4cc; margin-bottom:28px; line-height:1.7; }
.dl-teaser-cards{ display:grid; grid-template-columns:repeat(3,1fr); gap:18px; }
.dlt-card{
  background:rgba(255,255,255,.06); border:1px solid rgba(255,255,255,.12);
  border-radius:14px; padding:24px; transition:all .3s var(--ease); backdrop-filter:blur(6px);
  display:flex; flex-direction:column;
}
.dlt-card:hover{ background:rgba(31,94,255,.18); border-color:var(--blue); transform:translateY(-4px); }
.dlt-os{ display:inline-flex; align-items:center; gap:6px; font-size:12px; font-weight:700; color:#7fa5ff; margin-bottom:10px; }
.dlt-name{ font-size:17px; font-weight:700; color:#fff; margin-bottom:6px; }
.dlt-meta{ font-size:13px; color:#aab4cc; line-height:1.6; margin-bottom:14px; }
.dlt-feats{ list-style:none; display:flex; flex-direction:column; gap:8px; flex:1; }
.dlt-feats li{
  position:relative; padding-left:20px; font-size:13px; color:#8b96b0; line-height:1.5;
}
.dlt-feats li::before{
  content:''; position:absolute; left:0; top:6px; width:12px; height:7px;
  border-left:2px solid var(--cyan); border-bottom:2px solid var(--cyan);
  transform:rotate(-45deg);
}
.dlt-btn{
  margin-top:20px; display:inline-flex; align-items:center; justify-content:center; gap:8px;
  font-size:14px; font-weight:600; color:#fff;
  background:linear-gradient(100deg,var(--blue),var(--blue-deep));
  padding:11px 22px; border-radius:100px; transition:all .25s var(--ease);
  box-shadow:0 6px 18px -8px rgba(31,94,255,.55);
}
.dlt-btn:hover{ transform:translateY(-2px); box-shadow:0 12px 26px -8px rgba(31,94,255,.75); }
.dlt-btn svg{ width:16px; height:16px; flex-shrink:0; }

/* ════════════════════════════════
   关于我们页
════════════════════════════════ */
.about-intro{ max-width:820px; margin:0 auto 8px; text-align:center; }
.about-intro h2{ font-size:clamp(24px,3vw,34px); margin-bottom:18px; }
.about-intro p{ font-size:16px; color:var(--muted); line-height:1.85; }

.contact-grid{ display:grid; grid-template-columns:repeat(2,1fr); gap:20px; }
.contact-card{
  display:flex; gap:18px; align-items:flex-start;
  background:var(--bg); border:1px solid var(--line); border-radius:var(--r);
  padding:28px 26px; transition:all .3s var(--ease);
}
.contact-card:hover{ box-shadow:var(--shadow); transform:translateY(-3px); border-color:transparent; }
.contact-ico{
  flex-shrink:0; width:50px; height:50px; border-radius:13px; font-size:22px;
  background:var(--blue-soft); display:flex; align-items:center; justify-content:center;
}
.contact-card h4{ font-size:14px; color:var(--muted); font-weight:600; margin-bottom:6px; }
.contact-card .val{ font-size:18px; font-weight:700; color:var(--ink); letter-spacing:-.01em; }
.contact-card .val a{ color:var(--blue); }
.contact-card .val.sm{ font-size:16px; }

.partner-grid{ display:grid; grid-template-columns:repeat(4,1fr); gap:16px; }
.partner-item{
  background:var(--bg); border:1px solid var(--line); border-radius:var(--r);
  padding:26px 18px; text-align:center; font-size:16px; font-weight:700; color:#7a8499;
  transition:all .3s var(--ease);
}
.partner-item:hover{ color:var(--ink); box-shadow:var(--shadow); transform:translateY(-3px); border-color:transparent; }
.honor-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:16px; }
.honor-item{
  display:flex; align-items:center; gap:14px;
  background:var(--bg); border:1px solid var(--line); border-radius:var(--r);
  padding:20px 22px; transition:all .3s var(--ease);
}
.honor-item:hover{ box-shadow:var(--shadow); transform:translateY(-3px); }
.honor-item .hi-ico{ font-size:22px; }
.honor-item span:last-child{ font-size:15px; font-weight:600; color:var(--ink); }

/* ════════════════════════════════
   HERO 教室照片 + 群体卡
════════════════════════════════ */
.hero-photo{
  position:relative; border-radius:var(--r-lg); overflow:hidden;
  box-shadow:0 30px 70px -24px rgba(20,40,90,.4); border:1px solid rgba(255,255,255,.6);
  aspect-ratio:1590/1010;
}
/* 缓慢推近：教室“被唤醒”的呼吸感 */
.hero-photo img{
  width:100%; height:100%; object-fit:cover; display:block;
  transform-origin:60% 45%; animation:roomBreathe 18s ease-in-out infinite;
}
@keyframes roomBreathe{ 0%,100%{ transform:scale(1.04) } 50%{ transform:scale(1.1) } }
.hero-photo::after{
  content:''; position:absolute; inset:0; pointer-events:none;
  background:
    radial-gradient(120% 80% at 60% 38%, rgba(31,94,255,.04), transparent 60%),
    linear-gradient(180deg,transparent 55%,rgba(11,21,48,.06));
}

/* AI 之光：一道光束周期性扫过教室，寓意“AI 走进教室” */
.hero-photo-sweep{
  position:absolute; inset:0; z-index:2; pointer-events:none; overflow:hidden;
  -webkit-mask:linear-gradient(#000,#000); mask:linear-gradient(#000,#000);
}
.hero-photo-sweep::before{
  content:''; position:absolute; top:-30%; bottom:-30%; left:-40%; width:45%;
  background:linear-gradient(105deg,transparent,rgba(120,190,255,.18) 40%,rgba(180,235,255,.5) 50%,rgba(120,190,255,.18) 60%,transparent);
  transform:skewX(-12deg); filter:blur(2px);
  animation:aiSweep 7s ease-in-out infinite;
}
@keyframes aiSweep{
  0%{ left:-50%; opacity:0 }
  12%{ opacity:1 }
  55%{ left:120%; opacity:1 }
  60%,100%{ left:120%; opacity:0 }
}

/* 漂浮的 AI 光点：智能在教室中“点亮” */
.hero-ai-node{
  position:absolute; z-index:3; width:9px; height:9px; border-radius:50%;
  background:radial-gradient(circle,#fff,var(--cyan) 60%,transparent 72%);
  box-shadow:0 0 12px 3px rgba(24,197,212,.55); opacity:0;
  animation:aiNode 5.5s ease-in-out infinite;
}
.hero-ai-node.n1{ left:18%; top:30%; animation-delay:.2s; }
.hero-ai-node.n2{ left:46%; top:22%; animation-delay:1.4s; }
.hero-ai-node.n3{ left:72%; top:38%; animation-delay:2.6s; }
.hero-ai-node.n4{ left:33%; top:62%; animation-delay:3.4s; }
.hero-ai-node.n5{ left:62%; top:68%; animation-delay:4.3s; }
@keyframes aiNode{
  0%{ opacity:0; transform:translateY(8px) scale(.6) }
  25%{ opacity:1; transform:translateY(0) scale(1) }
  60%{ opacity:.9; transform:translateY(-6px) scale(1) }
  100%{ opacity:0; transform:translateY(-14px) scale(.6) }
}

/* Hero 内 4 群体卡（通屏） */
.hero-roles{ position:relative; z-index:1; display:grid; grid-template-columns:repeat(4,1fr); gap:20px; margin-top:48px; }
.hero-role{
  background:rgba(255,255,255,.7); backdrop-filter:blur(8px);
  border:1px solid rgba(31,94,255,.12); border-radius:14px;
  padding:18px 16px; transition:all .3s var(--ease);
}
.hero-role:hover{ background:#fff; box-shadow:var(--shadow); transform:translateY(-4px); border-color:transparent; }
.hero-role .hr-head{ display:flex; align-items:center; gap:11px; margin-bottom:10px; }
.hero-role .hr-ico{
  width:38px; height:38px; border-radius:10px; flex-shrink:0;
  background:linear-gradient(135deg,var(--blue),var(--cyan)); color:#fff;
  display:flex; align-items:center; justify-content:center;
}
.hero-role .hr-ico .ic{ width:20px; height:20px; }
.hero-role h3{ font-size:16px; }
.hero-role p{ font-size:13px; color:var(--muted); line-height:1.6; }
/* 教室背景模式下的玻璃卡片 */
.hero-photo-mode .hero-role{
  background:rgba(255,255,255,.1); border:1px solid rgba(255,255,255,.18);
  backdrop-filter:blur(14px); -webkit-backdrop-filter:blur(14px);
}
.hero-photo-mode .hero-role:hover{ background:rgba(255,255,255,.18); border-color:rgba(255,255,255,.3); box-shadow:0 16px 40px -18px rgba(0,0,0,.5); }
.hero-photo-mode .hero-role h3{ color:#fff; }
.hero-photo-mode .hero-role p{ color:rgba(255,255,255,.78); }

/* ════════════════════════════════
   客户价值
════════════════════════════════ */
.cv-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:22px; }
.cv-card{
  position:relative; background:var(--bg); border:1px solid var(--line);
  border-radius:var(--r-lg); padding:36px 30px; overflow:hidden; transition:all .3s var(--ease);
}
.cv-card::before{
  content:''; position:absolute; left:0; top:0; bottom:0; width:4px;
  background:linear-gradient(180deg,var(--blue),var(--cyan));
  transform:scaleY(0); transform-origin:top; transition:transform .4s var(--ease);
}
.cv-card:hover{ box-shadow:var(--shadow-lg); transform:translateY(-5px); }
.cv-card:hover::before{ transform:scaleY(1); }
.cv-num{ font-size:clamp(40px,5vw,56px); font-weight:800; line-height:1; letter-spacing:-.03em;
  background:linear-gradient(120deg,var(--blue),var(--cyan)); -webkit-background-clip:text; background-clip:text; -webkit-text-fill-color:transparent; }
.cv-title{ font-size:18px; font-weight:700; color:var(--ink); margin:14px 0 8px; }
.cv-desc{ font-size:14px; color:var(--muted); line-height:1.7; }

/* ════════════════════════════════
   硬件型号（首页产品01 丰富展示）
════════════════════════════════ */
.hw-row{ display:grid; grid-template-columns:repeat(3,1fr); gap:20px; margin-top:36px; }
.hw-card{
  background:var(--bg); border:1px solid var(--line); border-radius:var(--r-lg);
  padding:26px 24px; text-align:center; transition:all .3s var(--ease);
}
.hw-card:hover{ box-shadow:var(--shadow); transform:translateY(-5px); border-color:transparent; }
.hw-card.featured{ border-color:var(--blue); box-shadow:0 14px 40px -16px rgba(31,94,255,.36); }
.hw-printer{
  height:120px; margin:0 auto 18px; position:relative; width:140px;
}
/* CSS 打印机插画 */
.printer-body{ position:absolute; left:18px; right:18px; top:34px; bottom:14px;
  background:linear-gradient(160deg,#dfe7f5,#c3cfe6); border-radius:12px 12px 14px 14px;
  box-shadow:inset 0 -8px 16px -8px rgba(20,40,90,.25); }
.printer-top{ position:absolute; left:30px; right:30px; top:18px; height:24px;
  background:linear-gradient(160deg,#eef2fb,#d4ddf0); border-radius:10px 10px 4px 4px; }
.printer-paper{ position:absolute; left:42px; right:42px; top:8px; height:22px;
  background:#fff; border-radius:4px 4px 0 0; box-shadow:0 -2px 6px rgba(20,40,90,.12); }
.printer-slot{ position:absolute; left:34px; right:34px; top:62px; height:5px; background:rgba(11,21,48,.35); border-radius:3px; }
.printer-light{ position:absolute; right:30px; top:48px; width:7px; height:7px; border-radius:50%;
  background:#22c55e; box-shadow:0 0 8px #22c55e; animation:pulse 1.6s infinite; }
.printer-out{ position:absolute; left:46px; right:46px; bottom:6px; height:16px; background:#fff;
  border-radius:0 0 4px 4px; box-shadow:0 4px 8px -4px rgba(20,40,90,.2); }
.hw-name{ font-size:18px; font-weight:800; margin-bottom:4px; }
.hw-name span{ color:var(--blue); }
.hw-use{ font-size:13px; color:var(--blue); font-weight:600; margin-bottom:14px; }
.hw-specs{ list-style:none; text-align:left; }
.hw-specs li{ font-size:13px; color:var(--muted); padding:6px 0 6px 18px; position:relative; border-bottom:1px dashed var(--line); }
.hw-specs li:last-child{ border-bottom:none; }
.hw-specs li::before{ content:''; position:absolute; left:0; top:13px; width:6px; height:6px; border-radius:50%; background:var(--cyan); }

/* ════════════════════════════════
   龙虾平台三大市场（首页产品02 丰富展示）
════════════════════════════════ */
.market-row{ display:grid; grid-template-columns:repeat(3,1fr); gap:20px; margin-top:36px; }
.market-card{
  background:var(--bg); border:1px solid var(--line); border-radius:var(--r-lg);
  padding:30px 26px; transition:all .3s var(--ease); position:relative; overflow:hidden;
}
.market-card::after{
  content:''; position:absolute; right:-30px; top:-30px; width:110px; height:110px;
  background:radial-gradient(circle,var(--blue-soft),transparent 70%);
}
.market-card:hover{ box-shadow:var(--shadow-lg); transform:translateY(-6px); border-color:transparent; }
.market-ico{
  width:50px; height:50px; border-radius:13px; margin-bottom:16px; color:var(--blue);
  background:var(--blue-soft); display:flex; align-items:center; justify-content:center; position:relative; z-index:1;
}
.market-ico .ic{ width:26px; height:26px; }
.market-card h4{ font-size:18px; margin-bottom:8px; }
.market-count{ font-size:13px; font-weight:700; color:var(--blue); margin-bottom:10px; }
.market-card p{ font-size:14px; color:var(--muted); line-height:1.7; margin-bottom:14px; }
.market-tags{ display:flex; flex-wrap:wrap; gap:7px; }
.market-tags span{ font-size:12px; color:var(--text); background:var(--bg-alt); border:1px solid var(--line); padding:4px 10px; border-radius:7px; }

/* 平台核心能力 strip（产品 01） */
.cap-strip{ display:grid; grid-template-columns:repeat(4,1fr); gap:18px; margin-top:36px; }
.cap-item{
  background:var(--bg); border:1px solid var(--line); border-radius:var(--r-lg);
  padding:24px 22px; transition:all .3s var(--ease);
}
.cap-item:hover{ box-shadow:var(--shadow); transform:translateY(-4px); border-color:transparent; }
.cap-ico{
  width:40px; height:40px; border-radius:11px; color:var(--blue); flex-shrink:0;
  background:var(--blue-soft); display:flex; align-items:center; justify-content:center;
}
.cap-ico .ic{ width:21px; height:21px; }
.cap-head{ display:flex; align-items:center; gap:12px; margin-bottom:12px; }
.cap-item h4{ font-size:16px; margin:0; }
.cap-item p{ font-size:13px; color:var(--muted); line-height:1.7; }

/* AI Native 底座卡片（产品 02 art） */
.art-base{ display:flex; flex-direction:column; gap:16px; position:relative; z-index:1; }
.base-card{
  display:flex; align-items:center; gap:16px; background:var(--bg);
  border:1px solid var(--line); border-radius:var(--r-lg); padding:20px 22px;
  transition:all .3s var(--ease);
}
.base-card:hover{ transform:translateY(-4px); box-shadow:var(--shadow); }
.base-card.base-lead{ background:linear-gradient(120deg,var(--blue),var(--cyan)); border-color:transparent; }
.base-card .ico{
  width:48px; height:48px; border-radius:13px; flex-shrink:0; color:var(--blue);
  background:var(--blue-soft); display:flex; align-items:center; justify-content:center;
}
.base-card.base-lead .ico{ background:rgba(255,255,255,.22); color:#fff; }
.base-card .ico .ic{ width:25px; height:25px; }
.base-card .bc-tx{ display:flex; flex-direction:column; gap:3px; }
.base-card .nm{ font-size:17px; font-weight:700; color:var(--ink); }
.base-card .sub{ font-size:13px; color:var(--muted); }
.base-card.base-lead .nm{ color:#fff; }
.base-card.base-lead .sub{ color:rgba(255,255,255,.85); }
/* 龙虾平台：产品截图 + 双卡片 */
.lobster-art{ position:relative; }
.lobster-shot{
  position:relative; border-radius:16px; overflow:hidden;
  border:3px solid #fff; box-shadow:0 30px 60px -22px rgba(20,40,90,.42);
  background:#0b1020; z-index:1;
}
.lobster-shot::after{
  content:''; position:absolute; inset:0; border-radius:13px; pointer-events:none;
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.08);
}
.lobster-shot img{ width:100%; height:auto; display:block; }
.lobster-cards{
  position:relative; z-index:2; margin:-26px auto 0; display:flex; gap:12px;
  justify-content:center; flex-wrap:wrap;
}
.lobster-cards .base-card{ flex:1; min-width:0; padding:14px 16px; box-shadow:0 18px 40px -18px rgba(20,40,90,.4); }
.lobster-cards .base-card .ico{ width:40px; height:40px; }
.lobster-cards .base-card .ico .ic{ width:20px; height:20px; }
.lobster-cards .base-card .nm{ font-size:15px; }
.lobster-cards .base-card .sub{ font-size:12px; }

/* ════════════════════════════════
   常见问题 FAQ
════════════════════════════════ */
.faq-grid{ display:grid; grid-template-columns:1fr 1fr; gap:16px; }
.faq-item{
  background:var(--bg); border:1px solid var(--line); border-radius:var(--r);
  padding:6px 24px; transition:all .25s var(--ease); cursor:pointer;
}
.faq-item:hover{ box-shadow:var(--shadow); }
.faq-item[open]{ border-color:var(--blue); box-shadow:var(--shadow); }
.faq-q{
  display:flex; align-items:center; justify-content:space-between; gap:14px;
  font-size:16px; font-weight:600; color:var(--ink); padding:20px 0; list-style:none;
}
.faq-q::-webkit-details-marker{ display:none; }
.faq-q .fq-ico{
  flex-shrink:0; width:24px; height:24px; border-radius:7px; background:var(--blue-soft);
  color:var(--blue); display:flex; align-items:center; justify-content:center;
  font-size:18px; font-weight:600; transition:all .25s var(--ease);
}
.faq-item[open] .faq-q .fq-ico{ background:var(--blue); color:#fff; transform:rotate(45deg); }
.faq-a{ font-size:14px; color:var(--muted); line-height:1.75; padding:0 0 22px; }




/* ════════════════════════════════
   RESPONSIVE
════════════════════════════════ */
@media(max-width:980px){
  .footer-inner{ grid-template-columns:1fr 1fr; }
  .footer-col-social{ grid-column:1/-1; }
  .loop-grid,.loop-values,.g4{ grid-template-columns:1fr 1fr; }
  .value-strip{ grid-template-columns:1fr 1fr; gap:24px 0; }
  .value-item:nth-child(2){ border-right:none; }
  .news-featured{ grid-template-columns:1fr; }
  .hero-split{ grid-template-columns:1fr; gap:40px; }
  .hero-col-visual{ max-width:520px; margin:0 auto; width:100%; }
  .showcase-inner{ grid-template-columns:1fr; gap:40px; }
  .showcase.reverse .showcase-text{ order:1; }
  .showcase.reverse .showcase-art{ order:2; }
  .dl-teaser-inner{ grid-template-columns:1fr; gap:36px; }
  .contact-grid{ grid-template-columns:1fr 1fr; }
  .partner-grid{ grid-template-columns:repeat(3,1fr); }
  .honor-grid{ grid-template-columns:repeat(2,1fr); }
  .hero-roles{ grid-template-columns:repeat(2,1fr); }
  .cv-grid,.hw-row,.market-row{ grid-template-columns:1fr; }
  .cap-strip{ grid-template-columns:repeat(2,1fr); }
  .faq-grid{ grid-template-columns:1fr; }
  .split-feature{ grid-template-columns:1fr; gap:32px; }
  .split-feature.reverse .split-text{ order:1; }
  .split-feature.reverse .split-visual{ order:2; }
}
@media(max-width:768px){
  .page-hero-split{ grid-template-columns:1fr; gap:34px; }
  .page-hero-visual{ min-height:auto; order:2; }
  .page-hero-visual img{ max-width:230px; }
  .page-hero-visual-shot img{ max-width:100%; }
  .page-hero-stack{ min-height:300px; }
  .page-hero-stack .phs-img{ width:74%; }
  .page-hero-split .page-hero-text p{ max-width:none; }
  .printer-stage{ grid-template-columns:1fr; gap:20px; justify-items:center; }
  .printer-photo{ width:130px; }
  .printer-models{ width:100%; }
  .pm-head{ flex-wrap:wrap; }
  .nav-links{
    position:fixed; top:72px; right:0; width:min(78vw,320px);
    height:calc(100vh - 72px); background:rgba(255,255,255,.97);
    backdrop-filter:blur(16px); flex-direction:column; align-items:flex-start;
    gap:2px; padding:24px; box-shadow:-10px 0 40px -12px rgba(0,0,0,.18);
    transform:translateX(105%); transition:transform .35s var(--ease);
    overflow-y:auto;
  }
  .nav-links.open{ transform:none; }
  .nav-link{ width:100%; padding:12px 14px; border-bottom:1px solid var(--line); border-radius:0; }
  .nav-dropdown{ width:100%; }
  .dropdown-trigger{ width:100%; justify-content:space-between; padding:12px 14px; border-radius:0; border-bottom:1px solid var(--line); }
  .dropdown-panel{
    position:static; transform:none; opacity:1; visibility:visible; pointer-events:auto;
    box-shadow:none; border:none; border-radius:0; padding:0;
    display:none; background:var(--bg-alt);
  }
  .nav-dropdown.open .dropdown-panel{ display:block; }
  .nav-toggle{ display:flex; }
  .section{ padding:64px 0; }
  .g4,.g3,.g2,.policy-grid,.model-grid,.scene-grid,.price-grid,.vision-cols,
  .loop-grid,.loop-values,.product-cards,.dl-grid,.news-grid,
  .card-grid.g3,.card-grid.g4{ grid-template-columns:1fr; }
  .value-strip{ grid-template-columns:1fr 1fr; }
  .arch-layer{ flex-direction:column; align-items:flex-start; }
  .arch-tag{ flex:none; }
  .flow{ gap:4px; }
  .flow-arrow{ transform:rotate(90deg); }
  .footer-inner{ grid-template-columns:1fr; gap:32px; }
  .footer-col-social{ grid-column:auto; }
  .dl-teaser-cards{ grid-template-columns:1fr; }
  .dl-row{ flex-direction:column; align-items:flex-start; gap:16px; text-align:left; }
  .dl-row .dl-btn{ width:100%; }
  .contact-grid{ grid-template-columns:1fr; }
  .partner-grid{ grid-template-columns:1fr 1fr; }
  .honor-grid{ grid-template-columns:1fr; }
  .hero-metrics{ gap:24px; }
  .faq-grid{ grid-template-columns:1fr; }
}
@media(max-width:480px){
  .container{ padding:0 16px; }
  .hero-stats{ gap:22px; }
  .stat{ flex:0 0 44%; }
}
@media(prefers-reduced-motion:reduce){
  *{ animation:none!important; transition:none!important; }
  .reveal{ opacity:1; transform:none; }
}