/* ==========================================================================
   新动云智GEO 企业官网 - 全站唯一样式表
   文件：css/style.css
   说明：所有页面共用此样式表；样式与 HTML/JS 完全分离。
   如需替换品牌视觉，请优先修改 :root 变量与 images/logo.svg。
   ========================================================================== */

:root{
  --c1:#4f46e5;   /* indigo */
  --c2:#7c3aed;   /* violet */
  --c3:#2563eb;   /* blue */
  --c4:#06b6d4;   /* cyan accent */
  --grad:linear-gradient(135deg,#4f46e5 0%,#7c3aed 55%,#9333ea 100%);
  --grad-soft:linear-gradient(135deg,rgba(79,70,229,.10),rgba(124,58,237,.10));
  --ink:#0f172a;
  --ink-2:#334155;
  --muted:#64748b;
  --bg:#f0f5ff;
  --card:#ffffff;
  --line:#e6e8f2;
  --ok:#10b981;
  --warn:#f59e0b;
  --danger:#ef4444;
  --radius:18px;
  --shadow:0 10px 30px rgba(79,70,229,.08),0 2px 8px rgba(15,23,42,.04);
  --shadow-hover:0 18px 42px rgba(79,70,229,.16),0 4px 12px rgba(15,23,42,.06);
  --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:var(--font);
  color:var(--ink);
  background:var(--bg);
  line-height:1.7;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;vertical-align:middle}
::selection{background:rgba(124,58,237,.22)}

/* ===== 顶部导航 ===== */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:999;
  background:rgba(255,255,255,.82);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(230,232,242,.9);
  transition:box-shadow .3s;
}
.nav.scrolled{box-shadow:0 6px 24px rgba(15,23,42,.08)}
.nav-inner{
  max-width:1200px;margin:0 auto;padding:0 24px;
  height:62px;display:flex;align-items:center;justify-content:space-between;gap:20px;
}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px;white-space:nowrap;text-decoration:none;color:var(--ink)}
.brand .brand-logo{
  width:120px;height:36px;object-fit:contain;flex-shrink:0;
  filter:drop-shadow(0 4px 10px rgba(79,70,229,.35));
}
.brand em{font-style:normal;background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.nav-links{display:flex;align-items:center;gap:2px;flex-wrap:wrap;justify-content:flex-end}
.nav-links a{
  color:var(--ink-2);text-decoration:none;font-size:13.5px;font-weight:600;
  padding:7px 11px;border-radius:9px;transition:.2s;white-space:nowrap;
}
.nav-links a:hover{color:var(--c2);background:rgba(124,58,237,.08)}
.nav-links a.active{color:var(--c2);background:rgba(124,58,237,.12)}
.nav-cta{
  margin-left:8px;background:linear-gradient(#fff,#fff) padding-box,var(--grad) border-box;
  color:#4f46e5 !important;border:1.5px solid transparent;
  display:inline-flex;align-items:center;justify-content:center;
  height:36px;padding:0 18px !important;white-space:nowrap;
  border-radius:999px !important;box-shadow:0 4px 14px rgba(79,70,229,.18);
  transition:.25s;
}
.nav-cta:hover{color:#7c3aed !important;transform:translateY(-1px);box-shadow:0 6px 18px rgba(79,70,229,.3)}
/* 汉堡按钮：桌面端(>960px)隐藏，仅作为移动端导航入口 */
.nav-toggle{
  display:none;
}

/* ===== 移动端导航菜单（≤960px） =====
   默认 .nav-links 隐藏；点击汉堡按钮添加 .open 后展开为顶部下拉面板。
   保持桌面导航视觉与既有 960/640 网格降级不变。 */
@media (max-width:960px){
  .nav-toggle{
    display:inline-flex;align-items:center;justify-content:center;
    width:44px;height:44px;padding:0;margin-left:auto;
    border:none;background:transparent;border-radius:10px;cursor:pointer;flex-shrink:0;
  }
  .nav-toggle:hover{background:rgba(124,58,237,.08)}
  .nav-toggle-bar{
    display:block;width:22px;height:2px;background:var(--ink);border-radius:2px;
    margin:3px auto;transition:transform .25s ease,opacity .2s ease;
  }
  .nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1){transform:translateY(5px) rotate(45deg)}
  .nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2){opacity:0}
  .nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3){transform:translateY(-5px) rotate(-45deg)}
  .nav-links{
    display:none; /* 默认收起 */
    position:fixed;top:62px;left:0;right:0;z-index:998;
    flex-direction:column;align-items:stretch;gap:2px;
    max-height:calc(100vh - 62px);overflow-y:auto;
    background:rgba(255,255,255,.98);
    backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
    border-bottom:1px solid rgba(230,232,242,.9);
    box-shadow:0 16px 32px rgba(15,23,42,.12);
    padding:10px 20px 22px;
  }
  .nav-links.open{display:flex} /* 展开状态 */
  .nav-links a{font-size:16px;padding:13px 14px;border-radius:10px}
  .nav-links .nav-cta{margin:10px 0 0;justify-content:center;height:44px;font-size:15px}
}

/* ===== 章节通用 ===== */
section{padding:88px 0;position:relative;scroll-margin-top:70px}
.wrap{max-width:1200px;margin:0 auto;padding:0 24px}
.sec-head{text-align:center;margin-bottom:52px}
.sec-tag{
  display:inline-block;font-size:12.5px;font-weight:800;letter-spacing:2px;color:var(--c2);
  background:rgba(124,58,237,.08);border:1px solid rgba(124,58,237,.18);
  padding:5px 14px;border-radius:999px;margin-bottom:14px;text-transform:uppercase;
}
.sec-title{font-size:34px;font-weight:900;letter-spacing:.5px;line-height:1.3}
.sec-title em{font-style:normal;background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.sec-sub{color:var(--muted);font-size:15.5px;max-width:760px;margin:14px auto 0}

/* ===== 内联样式转 class（原 5 处内联 style 的替代） ===== */
.pt-64{padding-top:64px !important}
.mt-30{margin-top:30px}
.tag-light{color:#e9d5ff !important;background:rgba(233,213,255,.12) !important;border-color:rgba(233,213,255,.3) !important}
.cta-title{font-size:clamp(30px,4vw,46px);font-weight:900;color:#fff;line-height:1.3}
.cta-contact{margin-top:26px;font-size:13px;color:#94a3b8}

/* ===== 封面 Hero（首页） ===== */
.hero{
  min-height:100vh;display:flex;align-items:center;position:relative;overflow:hidden;
  background:
    radial-gradient(1000px 560px at 82% -10%,rgba(6,182,212,.12),transparent 60%),
    radial-gradient(900px 560px at -10% 20%,rgba(99,102,241,.16),transparent 55%),
    radial-gradient(800px 520px at 45% 115%,rgba(147,51,234,.13),transparent 60%),
    linear-gradient(140deg,#f2f5ff 0%,#e2eaff 46%,#efe9ff 100%);
  color:#1e1b4b;
}
.hero-grid-bg{
  position:absolute;inset:0;opacity:.5;pointer-events:none;
  background-image:linear-gradient(rgba(99,102,241,.10) 1px,transparent 1px),linear-gradient(90deg,rgba(99,102,241,.10) 1px,transparent 1px);
  background-size:56px 56px;
  -webkit-mask-image:radial-gradient(ellipse 80% 70% at 50% 40%,#000 20%,transparent 75%);
          mask-image:radial-gradient(ellipse 80% 70% at 50% 40%,#000 20%,transparent 75%);
}
.hero-orb{position:absolute;border-radius:50%;filter:blur(6px);opacity:.55}
.orb1{width:420px;height:420px;right:-120px;top:-120px;background:radial-gradient(circle,rgba(129,140,248,.65),transparent 68%)}
.orb2{width:340px;height:340px;left:-90px;bottom:-60px;background:radial-gradient(circle,rgba(45,212,191,.35),transparent 68%)}
.hero-inner{position:relative;z-index:2;max-width:1200px;margin:0 auto;padding:120px 24px 90px;text-align:center}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;letter-spacing:1px;
  color:#4338ca;background:rgba(255,255,255,.6);border:1px solid rgba(99,102,241,.25);
  padding:8px 18px;border-radius:999px;margin-bottom:26px;backdrop-filter:blur(6px);
}
.hero-badge .dot{width:8px;height:8px;border-radius:50%;background:#34d399;box-shadow:0 0 10px #34d399}
.hero h1{font-size:clamp(44px,7vw,84px);font-weight:900;line-height:1.12;letter-spacing:1px}
.hero h1 .grad{
  background:linear-gradient(120deg,#1e3a8a 0%,#4338ca 35%,#7c3aed 68%,#c026d3 100%);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
}
.hero-sub{font-size:clamp(18px,2.4vw,25px);font-weight:600;color:#475569;margin-top:18px}
.hero-desc{max-width:720px;margin:22px auto 0;color:#64748b;font-size:16px;line-height:1.9}
.hero-actions{display:flex;gap:14px;justify-content:center;margin-top:38px;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;gap:8px;text-decoration:none;font-weight:700;
  font-size:15px;padding:13px 26px;border-radius:12px;transition:.25s;cursor:pointer;border:none;
}
.btn-primary{
  background:linear-gradient(120deg,#6366f1,#a855f7);color:#fff;
  box-shadow:0 10px 26px rgba(124,58,237,.42);
}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 16px 34px rgba(124,58,237,.55)}
.btn-ghost{background:rgba(255,255,255,.65);color:#4338ca;border:1px solid rgba(99,102,241,.28);backdrop-filter:blur(6px)}
.btn-ghost:hover{background:rgba(99,102,241,.12);transform:translateY(-3px)}
.btn-light{background:#fff;color:#4c1d95;box-shadow:0 10px 26px rgba(0,0,0,.2)}
.btn-light:hover{transform:translateY(-3px);box-shadow:0 16px 34px rgba(0,0,0,.28)}
.hero-metrics{
  margin:64px auto 0;max-width:980px;display:grid;grid-template-columns:repeat(4,1fr);gap:16px;
}
.hm{
  background:rgba(255,255,255,.72);border:1px solid rgba(255,255,255,.95);border-radius:16px;
  padding:22px 14px;backdrop-filter:blur(8px);transition:.3s;
}
.hm:hover{transform:translateY(-4px);background:rgba(255,255,255,.96)}
.hm b{display:block;font-size:30px;font-weight:900;background:linear-gradient(120deg,#312e81,#7c3aed);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hm span{color:#64748b;font-size:13px;font-weight:600;margin-top:4px;display:block}
.hero-note{margin-top:20px;font-size:12px;color:#64748b;letter-spacing:.3px}
.scroll-hint{
  margin-top:44px;color:#64748b;font-size:12.5px;display:flex;flex-direction:column;align-items:center;gap:4px;
}
.scroll-hint i{width:1.5px;height:34px;background:linear-gradient(#6366f1,transparent);display:block;border-radius:2px;animation:drop 1.8s infinite}
@keyframes drop{0%{opacity:0;transform:scaleY(.3)}45%{opacity:1}100%{opacity:0;transform:translateY(10px) scaleY(1)}}

/* ===== 页面头部（一级栏目内页） ===== */
.page-hero{
  position:relative;overflow:hidden;padding:150px 0 74px;text-align:center;color:#1e1b4b;
  background:
    radial-gradient(1000px 560px at 82% -10%,rgba(6,182,212,.12),transparent 60%),
    radial-gradient(900px 560px at -10% 20%,rgba(99,102,241,.16),transparent 55%),
    radial-gradient(800px 520px at 45% 115%,rgba(147,51,234,.13),transparent 60%),
    linear-gradient(140deg,#f2f5ff 0%,#e2eaff 46%,#efe9ff 100%);
}
.page-hero .wrap{position:relative;z-index:2}
.page-hero .phero-badge{
  display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:700;letter-spacing:1.5px;
  color:#4338ca;background:rgba(255,255,255,.65);border:1px solid rgba(99,102,241,.25);
  padding:6px 16px;border-radius:999px;margin-bottom:20px;
}
.page-hero h1{font-size:clamp(34px,4.8vw,58px);font-weight:900;line-height:1.16;letter-spacing:.5px}
.page-hero h1 .grad{
  background:linear-gradient(120deg,#1e3a8a 0%,#4338ca 35%,#7c3aed 68%,#c026d3 100%);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
}
.page-hero .lead{max-width:800px;margin:20px auto 0;color:#64748b;font-size:16.5px;line-height:1.9}
.page-hero .lead b{color:#4338ca}

/* ===== 工具条 ===== */
.toolbar{margin:-58px auto 0;position:relative;z-index:5;max-width:1200px;padding:0 24px}
.toolbar .card{
  display:flex;flex-wrap:wrap;gap:18px;align-items:center;justify-content:space-between;
  background:#fff;border-radius:var(--radius);box-shadow:var(--shadow-hover);padding:20px 26px;
}
.toolbar p{font-size:14.5px;color:var(--ink-2)}
.toolbar p b{color:var(--c2)}
.tb-tags{display:flex;gap:10px;flex-wrap:wrap}
.tb-tag{font-size:13px;font-weight:700;color:var(--c1);background:rgba(99,102,241,.08);border:1px solid rgba(99,102,241,.2);padding:6px 13px;border-radius:999px}

/* ===== 卡片通用 ===== */
.card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);border:1px solid var(--line);transition:.3s}
.card:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover)}

.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
@media (max-width:960px){.grid-2,.grid-3,.grid-4{grid-template-columns:1fr 1fr}}
@media (max-width:640px){.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}}

/* 背景白/浅交替 */
.sec-alt{background:#fff}

/* ===== 背景 AI 图块 ===== */
.bg-cards{display:grid;grid-template-columns:repeat(5,1fr);gap:14px;margin-top:8px}
@media (max-width:960px){.bg-cards{grid-template-columns:repeat(2,1fr)}}
.ai-item{
  text-align:center;padding:22px 10px;border-radius:16px;background:#fff;border:1px solid var(--line);
  box-shadow:var(--shadow);transition:.3s;
}
.ai-item:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.ai-logo{
  width:46px;height:46px;border-radius:13px;margin:0 auto 10px;display:flex;align-items:center;justify-content:center;
  font-size:20px;color:#fff;font-weight:800;
}
.ai-item h4{font-size:15px;margin-bottom:2px}
.ai-item p{font-size:12px;color:var(--muted)}
.l-chat{background:linear-gradient(135deg,#10a37f,#0e8a6e)}
.l-perp{background:linear-gradient(135deg,#1f6feb,#003eb3)}
.l-doubao{background:linear-gradient(135deg,#3b82f6,#22d3ee)}
.l-yiyan{background:linear-gradient(135deg,#1e3a8a,#3b82f6)}
.l-gemini{background:linear-gradient(135deg,#4285f4,#9b72cb)}
.stat-row{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:34px}
@media (max-width:960px){.stat-row{grid-template-columns:1fr}}
.stat-banner{
  display:flex;gap:16px;align-items:center;background:#fff;border-radius:14px;padding:18px 20px;
  border:1px solid var(--line);box-shadow:var(--shadow);
}
.stat-banner .num{font-size:26px;font-weight:900;color:var(--c2);white-space:nowrap}
.stat-banner .lbl{font-size:13px;color:var(--muted);line-height:1.5}
.stat-banner .ic{font-size:24px;flex-shrink:0}

/* ===== 对比表格 ===== */
.cmp-wrap{overflow-x:auto;border-radius:16px;box-shadow:var(--shadow);border:1px solid var(--line)}
table.cmp{border-collapse:collapse;width:100%;min-width:760px;background:#fff;font-size:14.5px}
.cmp th,.cmp td{padding:14px 18px;text-align:left;border-bottom:1px solid #eef0f8;vertical-align:top}
.cmp thead th{
  font-size:15px;font-weight:800;letter-spacing:.5px;
}
.cmp thead th:first-child{background:#312e81;color:#fff;width:22%}
.cmp thead th.seo{background:linear-gradient(135deg,#0e7490,#06b6d4);color:#fff;width:39%}
.cmp thead th.geo{background:linear-gradient(135deg,#4f46e5,#9333ea);color:#fff;width:39%}
.cmp td.fn{font-weight:800;color:#3730a3;background:#f5f5ff}
.cmp td .seo-c{color:#0e7490;font-weight:600}
.cmp td .geo-c{color:#6d28d9;font-weight:600}
.cmp tbody tr:last-child td{border-bottom:none}
.cmp tbody tr:hover td{background:#faf8ff}
.pill{display:inline-block;font-size:12px;font-weight:700;padding:2px 10px;border-radius:999px}
.pill-new{background:linear-gradient(120deg,rgba(79,70,229,.14),rgba(147,51,234,.14));color:#6d28d9;border:1px solid rgba(109,40,217,.22)}
.pill-old{background:rgba(14,116,144,.1);color:#0e7490;border:1px solid rgba(14,116,144,.2)}

/* ===== 数字徽章 / 小卡 ===== */
.num-badge{
  width:44px;height:44px;border-radius:12px;background:var(--grad);color:#fff;font-weight:900;font-size:19px;
  display:flex;align-items:center;justify-content:center;margin-bottom:14px;box-shadow:0 6px 14px rgba(79,70,229,.3);
}
.mini-card{padding:26px 24px}
.mini-card h4{font-size:18px;font-weight:800;margin-bottom:8px}
.mini-card p{font-size:14px;color:var(--muted)}
.ic-badge{
  width:46px;height:46px;border-radius:13px;display:flex;align-items:center;justify-content:center;
  font-size:21px;margin-bottom:12px;
}
.ic-i{background:linear-gradient(135deg,rgba(99,102,241,.14),rgba(79,70,229,.1));color:#4f46e5}
.ic-v{background:linear-gradient(135deg,rgba(124,58,237,.14),rgba(217,70,239,.1));color:#7c3aed}
.ic-c{background:linear-gradient(135deg,rgba(6,182,212,.14),rgba(16,185,129,.1));color:#0891b2}
.ic-w{background:linear-gradient(135deg,rgba(245,158,11,.16),rgba(239,68,68,.1));color:#d97706}
.ic-g{background:linear-gradient(135deg,rgba(16,185,129,.14),rgba(132,204,22,.1));color:#059669}
.ic-p{background:linear-gradient(135deg,rgba(236,72,153,.14),rgba(147,51,234,.1));color:#db2777}

/* ===== 痛点 ===== */
.pain{background:#fffaf5}
.pain-card{padding:26px 24px;border-top:4px solid transparent}
.pain-card:hover{border-top-color:var(--danger)}
.pain-card h4{font-size:16.5px;font-weight:800;color:#b91c1c;margin-bottom:8px}
.pain-card p{font-size:13.8px;color:var(--muted)}
.pain-card .tag{display:inline-block;font-size:11.5px;color:#ef4444;background:rgba(239,68,68,.1);padding:3px 10px;border-radius:999px;margin-bottom:12px;font-weight:700}

/* ===== 方案功能模块 ===== */
.mod-card{padding:28px 26px;position:relative;overflow:hidden}
.mod-card::after{
  content:"";position:absolute;right:-34px;top:-34px;width:110px;height:110px;border-radius:50%;
  background:var(--grad-soft);opacity:.85;
}
.mod-card h4{font-size:17.5px;font-weight:800;margin-bottom:10px;display:flex;align-items:center;gap:10px}
.mod-card p{font-size:13.8px;color:var(--muted)}
.mod-list{margin-top:12px;font-size:13px;color:var(--ink-2)}
.mod-list b{color:var(--c2)}

/* ===== 指标卡 ===== */
.metric-section{background:#fff}
.metric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-bottom:26px}
/* cases.html “为什么能做到”三卡：三列铺满居中加宽 */
.metric-grid-3{grid-template-columns:repeat(3,1fr)}
.metric-grid-3 .metric{padding:30px 28px}
.metric-grid-3 .mv{font-size:38px;white-space:nowrap}
@media (max-width:960px){.metric-grid{grid-template-columns:1fr 1fr}}
@media (max-width:640px){.metric-grid{grid-template-columns:1fr}}
.metric{
  border-radius:18px;padding:26px 22px;color:#fff;position:relative;overflow:hidden;transition:.3s;box-shadow:var(--shadow);
}
.metric:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.metric::after{content:"";position:absolute;right:-30px;top:-30px;width:120px;height:120px;border-radius:50%;background:rgba(255,255,255,.12)}
.m1{background:linear-gradient(135deg,#4f46e5,#7c3aed)}
.m2{background:linear-gradient(135deg,#0ea5e9,#2563eb)}
.m3{background:linear-gradient(135deg,#7c3aed,#db2777)}
.m4{background:linear-gradient(135deg,#06b6d4,#10b981)}
.metric .mv{font-size:40px;font-weight:900;line-height:1.1;letter-spacing:.5px}
.metric-grid-3 .mv{font-size:38px;white-space:nowrap}/* 三卡变体：覆盖上一条同级 .mv 40px（同特异性靠后生效），标题桌面单行 */
.metric .ml{font-size:14px;font-weight:700;margin-top:8px;opacity:.95}
.metric .md{font-size:12.5px;margin-top:6px;opacity:.8;line-height:1.55}
.metric .delta{display:inline-block;font-size:12px;font-weight:800;background:rgba(255,255,255,.2);padding:3px 9px;border-radius:999px;margin-top:10px}
.data-note{font-size:12px;color:var(--muted);text-align:center;margin-top:6px}

/* ===== 场景 ===== */
.scene-card{display:flex;gap:16px;padding:24px;align-items:flex-start}
.scene-card .scene-no{
  font-size:13px;font-weight:800;color:#fff;background:var(--grad);min-width:34px;height:34px;border-radius:10px;
  display:flex;align-items:center;justify-content:center;box-shadow:0 4px 10px rgba(79,70,229,.25);flex-shrink:0;
}
.scene-card h4{font-size:17px;font-weight:800;margin-bottom:4px}
.scene-card .scene-tag{font-size:12px;color:var(--c2);font-weight:700;margin-bottom:8px;display:block}
.scene-card p{font-size:13.5px;color:var(--muted)}

/* ===== 技术架构 ===== */
.arch{max-width:980px;margin:0 auto}
.arch-layer{display:flex;gap:14px;align-items:stretch;margin-bottom:14px}
.arch-label{
  flex:0 0 96px;display:flex;align-items:center;justify-content:center;font-size:13.5px;font-weight:800;
  color:#fff;border-radius:12px;letter-spacing:1px;
}
.arch-body{flex:1;display:flex;flex-wrap:wrap;gap:12px;align-content:center}
.arch-node{
  flex:1;min-width:140px;background:#fff;border:1px solid var(--line);border-radius:13px;padding:13px 16px;
  box-shadow:var(--shadow);transition:.3s;
}
.arch-node:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.arch-node b{font-size:14px;display:block;margin-bottom:3px}
.arch-node span{font-size:12px;color:var(--muted);display:block;line-height:1.5}
.al1{background:linear-gradient(135deg,#312e81,#4f46e5)}
.al2{background:linear-gradient(135deg,#3730a3,#6366f1)}
.al3{background:linear-gradient(135deg,#4f46e5,#7c3aed)}
.al4{background:linear-gradient(135deg,#6d28d9,#a855f7)}
.al5{background:linear-gradient(135deg,#7c3aed,#c026d3)}
.al6{background:linear-gradient(135deg,#a855f7,#ec4899)}
.arch-note{text-align:center;font-size:13px;color:var(--muted);margin-top:22px}

/* ===== 时间线 ===== */
.timeline{max-width:980px;margin:0 auto;position:relative;padding-left:34px}
.timeline::before{
  content:"";position:absolute;left:10px;top:8px;bottom:8px;width:3px;border-radius:3px;
  background:linear-gradient(180deg,#4f46e5,#9333ea,#ec4899);
}
.tl-item{position:relative;padding-bottom:36px}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{
  content:"";position:absolute;left:-31px;top:6px;width:17px;height:17px;border-radius:50%;
  background:#fff;border:4px solid var(--c2);box-shadow:0 0 0 5px rgba(124,58,237,.14);
}
.tl-item::after{
  content:"";position:absolute;left:-31px;top:6px;width:17px;height:17px;border-radius:50%;
  background:transparent;border:4px solid transparent;
  animation:pulse-ring 2.4s ease-out infinite;
}
@keyframes pulse-ring{
  0%{box-shadow:0 0 0 0 rgba(124,58,237,.35)}
  70%{box-shadow:0 0 0 14px rgba(124,58,237,0)}
  100%{box-shadow:0 0 0 0 rgba(124,58,237,0)}
}
.tl-card{background:#fff;border-radius:16px;box-shadow:var(--shadow);border:1px solid var(--line);padding:22px 26px;transition:.3s}
.tl-card:hover{transform:translateX(6px);box-shadow:var(--shadow-hover)}
.tl-head{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:10px}
.tl-phase{font-size:13px;font-weight:900;background:var(--grad);color:#fff;padding:5px 14px;border-radius:999px;letter-spacing:.5px}
.tl-time{font-size:13px;font-weight:700;color:var(--c3);background:rgba(37,99,235,.1);padding:4px 12px;border-radius:999px}
.tl-card h4{font-size:18px;font-weight:800}
.tl-card p{font-size:14px;color:var(--muted);margin-top:6px}
.tl-kpis{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.tl-kpi{font-size:12px;font-weight:700;color:var(--c1);background:rgba(99,102,241,.07);padding:4px 11px;border-radius:999px;border:1px solid rgba(99,102,241,.15)}

/* ===== 案例对比 ===== */
.case-compare{display:grid;grid-template-columns:1fr auto 1fr;gap:0;align-items:stretch;max-width:980px;margin:0 auto}
@media (max-width:960px){.case-compare{grid-template-columns:1fr}}
.case-side{border-radius:18px;padding:30px;box-shadow:var(--shadow)}
.case-before{background:#fff;border:1px solid var(--line)}
.case-after{background:linear-gradient(135deg,rgba(79,70,229,.05),rgba(147,51,234,.07));border:1px solid rgba(124,58,237,.25)}
.case-vs{display:flex;align-items:center;justify-content:center;padding:0 18px}
@media (max-width:960px){.case-vs{transform:rotate(90deg);padding:14px 0}}
.case-vs span{
  width:52px;height:52px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  font-weight:900;font-size:15px;color:#fff;background:var(--grad);box-shadow:0 8px 20px rgba(124,58,237,.4);
}
.case-side h5{font-size:16px;font-weight:800;display:flex;align-items:center;gap:8px;margin-bottom:6px}
.case-side .sub{font-size:13px;color:var(--muted);margin-bottom:16px}
.case-row{display:flex;justify-content:space-between;align-items:center;padding:11px 0;border-bottom:1px dashed #e2e8f0;font-size:14px;gap:12px}
.case-row:last-child{border-bottom:none}
.case-row .k{color:var(--ink-2);font-weight:600}
.case-row .v{font-weight:800;white-space:nowrap}
.before .v{color:#b91c1c}
.after .v{color:#059669}
.badge-up{display:inline-block;font-size:11px;font-weight:800;color:#059669;background:rgba(16,185,129,.12);padding:2px 8px;border-radius:999px;margin-left:6px;vertical-align:middle}

/* ===== CTA / 关于我们 ===== */
.cta{position:relative;overflow:hidden;color:#fff}
.cta-bg{
  position:absolute;inset:0;background:
    radial-gradient(700px 420px at 20% 120%,rgba(37,99,235,.5),transparent 60%),
    radial-gradient(700px 480px at 85% -20%,rgba(217,70,239,.4),transparent 60%),
    linear-gradient(135deg,#1e1b4b,#4c1d95 70%,#6b21a8);
}
.cta .wrap{position:relative;z-index:2;text-align:center}
.cta p{color:#cbd5e1;max-width:660px;margin:18px auto 0;font-size:16px}
.cta-actions{display:flex;gap:14px;justify-content:center;margin-top:34px;flex-wrap:wrap}
.team-row{display:flex;flex-wrap:wrap;gap:16px;justify-content:center;margin-top:34px}
.team-chip{
  display:flex;align-items:center;gap:12px;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.15);
  border-radius:14px;padding:12px 18px;backdrop-filter:blur(8px);
}
.team-chip .av{
  width:38px;height:38px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  color:#fff;font-weight:800;font-size:14px;background:linear-gradient(135deg,#6366f1,#a855f7);
}
.team-chip b{font-size:13.5px;display:block;line-height:1.3}
.team-chip span{font-size:11.5px;color:#a5b4fc}
.chips{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-top:18px}
.chip{font-size:12.5px;font-weight:700;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);padding:6px 14px;border-radius:999px;color:#e0e7ff}
.cta-faq{max-width:800px;margin:34px auto 0;text-align:left;display:grid;gap:12px}
.cta-faq details{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.16);border-radius:12px;padding:4px 16px;backdrop-filter:blur(8px)}
.cta-faq summary{cursor:pointer;font-weight:700;color:#e0e7ff;padding:10px 0;list-style:none}
.cta-faq summary::-webkit-details-marker{display:none}
.cta-faq details p{color:#a5b4fc;font-size:13.5px;margin:0 0 12px;line-height:1.7}

/* ===== Footer（全站统一） ===== */
footer{background:#0f0a2e;color:#818cf8;text-align:center;padding:34px 20px 30px;font-size:13px}
footer .f-brand{display:inline-flex;align-items:center;gap:10px;justify-content:center;font-weight:800;font-size:17px;color:#e0e7ff;text-decoration:none;margin-bottom:8px}
footer .f-brand img{height:26px;width:auto}
footer a{color:#a5b4fc;text-decoration:none}
footer a:hover{color:#c7d2fe}
footer .f-contact{color:#a5b4fc;margin-top:8px}
footer .f-contact a{font-weight:700}
footer .f-note{color:#6366f1;margin-top:12px;opacity:.85;font-size:12px}

/* ===== 滚动显现 ===== */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .7s ease,transform .7s ease}
.reveal.on{opacity:1;transform:none}
/* 无 JS / JS 尚未初始化时内容不隐藏；深色 CTA 区块内容恒可见 */
html:not(.js) .reveal,
html.js .cta .reveal{opacity:1;transform:none}

/* ===== 返回顶部 ===== */
#toTop{
  position:fixed;right:22px;bottom:26px;z-index:99;width:46px;height:46px;border-radius:13px;border:none;
  background:var(--grad);color:#fff;font-size:20px;cursor:pointer;box-shadow:0 10px 24px rgba(79,70,229,.4);
  opacity:0;visibility:hidden;transition:.3s;display:flex;align-items:center;justify-content:center;
}
#toTop.show{opacity:1;visibility:visible}
#toTop:hover{transform:translateY(-4px)}

/* ===== 响应式 ===== */
@media (max-width:960px){
  .nav-links{display:none}
  .grid-2,.grid-3,.grid-4,.metric-grid{grid-template-columns:1fr 1fr}
  .stat-row{grid-template-columns:1fr}
  .bg-cards{grid-template-columns:repeat(2,1fr)}
  .case-compare{grid-template-columns:1fr}
  .case-vs{transform:rotate(90deg);padding:14px 0}
  .hero-metrics{grid-template-columns:repeat(2,1fr)}
  .arch-label{flex:0 0 auto;width:96px}
}
@media (max-width:640px){
  section{padding:64px 0}
  .sec-title{font-size:26px}
  .hero-metrics{grid-template-columns:1fr}
  .grid-2,.grid-3,.grid-4,.metric-grid{grid-template-columns:1fr}
  .nav-inner{padding:0 16px}
}
@media print{
  .nav,#toTop,.hero-actions,.scroll-hint{display:none !important}
  body{background:#fff}
  .hero{min-height:auto;padding:40px 0}
  section{padding:30px 0}
}

/* ===== footer 补充（多页站点统一） ===== */
footer .f-motto{color:#a5b4fc;margin-top:6px;font-size:13px}
footer p{margin:0}