/* ==========================================================================
   GEO公司 · Geogs.cn  —  Design System  (Light / Editorial theme)
   生成式引擎优化（GEO）服务商官网
   ========================================================================== */

/* ---------------------------------------------------------------- tokens */
:root{
  /* surfaces */
  --bg:            #FFFFFF;
  --bg-soft:       #F5F8FE;
  --bg-elev:       #FFFFFF;
  --bg-elev-2:     #F7F9FE;

  /* lines */
  --line:          #E3E8F3;
  --line-strong:   #CFD7E9;
  --line-soft:     #EEF2FA;

  /* text */
  --tx:            #0C1426;
  --tx-2:          #4A5878;
  --tx-3:          #7482A3;
  --tx-4:          #9CA8C2;

  /* brand */
  --c1:            #2A5BEE;   /* blue   */
  --c2:            #0E8CA8;   /* teal   */
  --c3:            #7C3AED;   /* violet */
  --c4:            #0E9F6E;   /* green  */
  --grad:          linear-gradient(115deg,#2A5BEE 0%,#0E8CA8 52%,#7C3AED 100%);
  --grad-soft:     linear-gradient(115deg,rgba(42,91,238,.08),rgba(14,140,168,.07),rgba(124,58,237,.08));

  /* effects */
  --glass:         rgba(255,255,255,.72);
  --glass-2:       rgba(255,255,255,.95);
  --shadow-xs:     0 1px 2px rgba(16,32,72,.04), 0 4px 14px -8px rgba(16,32,72,.10);
  --shadow:        0 20px 60px -28px rgba(16,32,72,.22);
  --shadow-lg:     0 34px 80px -34px rgba(16,32,72,.30);
  --shadow-glow:   0 26px 64px -26px rgba(42,91,238,.42);

  /* geometry */
  --r-xs: 8px;
  --r-sm: 12px;
  --r:    18px;
  --r-lg: 26px;
  --r-xl: 34px;
  --nav-h: 74px;
  --wrap: 1200px;

  --ease: cubic-bezier(.22,.68,0,1);
}

/* ----------------------------------------------------------------- reset */
*,*::before,*::after{ box-sizing:border-box; }
html{ -webkit-text-size-adjust:100%; scroll-behavior:smooth; }
body{
  margin:0;
  background:var(--bg);
  color:var(--tx);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei UI","Microsoft YaHei",
              "Source Han Sans SC","Noto Sans SC",-apple-system,BlinkMacSystemFont,
              "Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img,svg,video{ display:block; max-width:100%; }
a{ color:inherit; text-decoration:none; }
button{ font:inherit; color:inherit; border:0; background:none; cursor:pointer; }
ul,ol{ margin:0; padding:0; list-style:none; }
h1,h2,h3,h4,h5{ margin:0; font-weight:600; line-height:1.24; letter-spacing:-.015em; }
p{ margin:0; }
input,textarea,select{ font:inherit; color:inherit; }
::selection{ background:rgba(42,91,238,.16); color:var(--tx); }

/* scrollbar */
::-webkit-scrollbar{ width:10px; height:10px; }
::-webkit-scrollbar-track{ background:#F2F5FB; }
::-webkit-scrollbar-thumb{ background:#D2DAEB; border-radius:20px; border:2px solid #F2F5FB; }
::-webkit-scrollbar-thumb:hover{ background:#BCC6DD; }

/* --------------------------------------------------------------- helpers */
.wrap{ width:100%; max-width:var(--wrap); margin-inline:auto; padding-inline:24px; }
.wrap-narrow{ max-width:900px; }
.sec{ position:relative; padding:112px 0; }
.sec-sm{ padding:76px 0; }
.center{ text-align:center; }
.grad-tx{
  background:var(--grad); -webkit-background-clip:text; background-clip:text;
  -webkit-text-fill-color:transparent; color:transparent;
}
.num{ font-variant-numeric:tabular-nums; font-feature-settings:"tnum"; }

.eyebrow{
  display:inline-flex; align-items:center; gap:8px;
  padding:6px 14px 6px 10px; border-radius:100px;
  border:1px solid var(--line);
  background:#F4F7FE;
  font-size:12.5px; letter-spacing:.16em; color:var(--tx-2);
  text-transform:uppercase; font-weight:600;
}
.eyebrow::before{
  content:""; width:6px; height:6px; border-radius:50%;
  background:var(--c1); box-shadow:0 0 0 3px rgba(42,91,238,.14);
  animation:pulse 2.4s var(--ease) infinite;
}
@keyframes pulse{ 0%,100%{opacity:1;transform:scale(1)} 50%{opacity:.45;transform:scale(.8)} }

.sec-head{ max-width:760px; margin-bottom:60px; }
.sec-head.center{ margin-inline:auto; }
.sec-head .eyebrow{ margin-bottom:22px; }
.sec-head h2{ font-size:clamp(28px,3.6vw,44px); line-height:1.2; margin-bottom:20px; }
.sec-head p{ color:var(--tx-2); font-size:clamp(15px,1.35vw,17px); }
.sec-head.center p{ margin-inline:auto; max-width:640px; }

/* --------------------------------------------------------------- buttons */
.btn{
  position:relative; display:inline-flex; align-items:center; justify-content:center; gap:10px;
  height:52px; padding:0 28px; border-radius:100px;
  font-size:15.5px; font-weight:600; letter-spacing:.02em;
  transition:transform .35s var(--ease), box-shadow .35s var(--ease),
             background .35s var(--ease), border-color .35s var(--ease), color .35s var(--ease);
  white-space:nowrap; overflow:hidden;
}
.btn svg{ width:17px; height:17px; flex:none; transition:transform .35s var(--ease); }
.btn:hover{ transform:translateY(-2px); }

.btn-primary{
  background:linear-gradient(115deg,#2A5BEE,#1E78D8 55%,#7C3AED);
  color:#fff;
  box-shadow:0 14px 34px -14px rgba(42,91,238,.62);
}
.btn-primary::after{
  content:""; position:absolute; inset:0;
  background:linear-gradient(115deg,#1E78D8,#7C3AED);
  opacity:0; transition:opacity .4s var(--ease);
}
.btn-primary:hover::after{ opacity:1; }
.btn-primary > *{ position:relative; z-index:1; }
.btn-primary:hover{ box-shadow:0 22px 48px -14px rgba(42,91,238,.7); }
.btn-primary:hover svg{ transform:translateX(3px); }

.btn-ghost{
  border:1px solid var(--line-strong);
  background:#fff;
  color:var(--tx);
  box-shadow:var(--shadow-xs);
}
.btn-ghost:hover{ border-color:#B7C3DE; background:#FBFCFE; }

.btn-sm{ height:42px; padding:0 20px; font-size:14px; }
.btn-block{ width:100%; }

.link-arrow{
  display:inline-flex; align-items:center; gap:8px;
  font-size:14.5px; font-weight:600; color:var(--c1);
  transition:gap .3s var(--ease),color .3s var(--ease);
}
.link-arrow svg{ width:15px; height:15px; }
.link-arrow:hover{ gap:13px; color:#1E4BD8; }

/* ------------------------------------------------------------ background */
.bg-fx{ position:fixed; inset:0; pointer-events:none; z-index:0; overflow:hidden; }
.bg-fx .grid{
  position:absolute; inset:-2px;
  background-image:
    linear-gradient(to right,rgba(42,91,238,.05) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(42,91,238,.05) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(ellipse 100% 58% at 50% 0%,#000 0%,transparent 76%);
  -webkit-mask-image:radial-gradient(ellipse 100% 58% at 50% 0%,#000 0%,transparent 76%);
}
.bg-fx .orb{ position:absolute; border-radius:50%; filter:blur(84px); opacity:.5; }
.bg-fx .o1{ width:700px;height:700px; top:-330px; left:-160px;
  background:radial-gradient(circle,rgba(42,91,238,.30),transparent 68%); animation:drift1 26s ease-in-out infinite; }
.bg-fx .o2{ width:620px;height:620px; top:-200px; right:-190px;
  background:radial-gradient(circle,rgba(124,58,237,.22),transparent 68%); animation:drift2 32s ease-in-out infinite; }
.bg-fx .o3{ width:560px;height:560px; top:34%; left:46%;
  background:radial-gradient(circle,rgba(14,140,168,.16),transparent 70%); animation:drift3 38s ease-in-out infinite; }
@keyframes drift1{ 50%{ transform:translate(90px,70px) scale(1.12);} }
@keyframes drift2{ 50%{ transform:translate(-80px,110px) scale(1.08);} }
@keyframes drift3{ 50%{ transform:translate(-60px,-90px) scale(1.15);} }
.bg-fx .noise{
  position:absolute; inset:0; opacity:.035; mix-blend-mode:multiply;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)' opacity='.5'/%3E%3C/svg%3E");
}

/* --------------------------------------------------------------- topbar */
.topbar{
  position:fixed; top:0; left:0; right:0; z-index:100;
  height:var(--nav-h);
  display:flex; align-items:center;
  transition:background .4s var(--ease),border-color .4s var(--ease),box-shadow .4s var(--ease);
  border-bottom:1px solid transparent;
}
.topbar.scrolled{
  background:rgba(255,255,255,.84);
  border-bottom-color:var(--line);
  backdrop-filter:blur(20px) saturate(160%);
  box-shadow:0 8px 30px -22px rgba(16,32,72,.28);
}
.nav{ display:flex; align-items:center; justify-content:space-between; gap:28px; }

.logo{ display:flex; align-items:center; gap:12px; flex:none; }
.logo-mark{
  width:40px; height:40px; border-radius:11px;
  background:var(--grad); display:grid; place-items:center;
  box-shadow:0 10px 22px -10px rgba(42,91,238,.7);
  position:relative; overflow:hidden;
}
.logo-mark::after{
  content:""; position:absolute; inset:0;
  background:linear-gradient(160deg,rgba(255,255,255,.45),transparent 55%);
}
.logo-mark svg{ width:22px; height:22px; position:relative; z-index:1; }
.logo-tx{ display:flex; flex-direction:column; line-height:1.12; }
.logo-tx b{ font-size:17.5px; font-weight:700; letter-spacing:.01em; color:var(--tx); }
.logo-tx span{ font-size:10.5px; color:var(--tx-3); letter-spacing:.2em; text-transform:uppercase; }

.nav-links{ display:flex; align-items:center; gap:4px; }
.nav-links a{
  position:relative; padding:9px 15px; border-radius:100px;
  font-size:14.5px; color:var(--tx-2); font-weight:500;
  transition:color .28s var(--ease),background .28s var(--ease);
}
.nav-links a:hover{ color:var(--tx); background:#F1F5FD; }
.nav-links a.active{ color:var(--c1); font-weight:600; }
.nav-links a.active::after{
  content:""; position:absolute; left:50%; bottom:1px; transform:translateX(-50%);
  width:16px; height:2px; border-radius:2px; background:var(--grad);
}
.nav-cta{ display:flex; align-items:center; gap:12px; flex:none; }

.burger{
  display:none; width:44px; height:44px; border-radius:12px;
  border:1px solid var(--line-strong); background:#fff;
  place-items:center; box-shadow:var(--shadow-xs);
}
.burger span{ display:block; width:18px; height:1.6px; background:var(--tx); border-radius:2px;
  transition:transform .35s var(--ease),opacity .25s var(--ease); }
.burger span+span{ margin-top:5px; }
.burger.on span:nth-child(1){ transform:translateY(6.6px) rotate(45deg); }
.burger.on span:nth-child(2){ opacity:0; }
.burger.on span:nth-child(3){ transform:translateY(-6.6px) rotate(-45deg); }

.drawer{
  position:fixed; inset:var(--nav-h) 0 auto 0; z-index:99;
  background:rgba(255,255,255,.98); backdrop-filter:blur(24px);
  border-bottom:1px solid var(--line);
  box-shadow:0 24px 50px -30px rgba(16,32,72,.35);
  padding:22px 24px 34px;
  transform:translateY(-14px); opacity:0; pointer-events:none;
  transition:transform .4s var(--ease),opacity .3s var(--ease);
  max-height:calc(100vh - var(--nav-h)); overflow-y:auto;
}
.drawer.open{ transform:none; opacity:1; pointer-events:auto; }
.drawer a{
  display:flex; align-items:center; justify-content:space-between;
  padding:15px 4px; font-size:16.5px; color:var(--tx-2);
  border-bottom:1px solid var(--line-soft);
}
.drawer a:last-of-type{ border-bottom:0; }
.drawer a svg{ width:15px; height:15px; color:var(--tx-4); }
.drawer a.active{ color:var(--c1); font-weight:600; }
.drawer .btn{ margin-top:20px; }

/* ---------------------------------------------------------------- hero */
.hero{ position:relative; z-index:1; padding:calc(var(--nav-h) + 76px) 0 96px; }
.hero-grid{ display:grid; grid-template-columns:1.06fr .94fr; gap:64px; align-items:center; }
.hero h1{
  font-size:clamp(34px,5.1vw,66px); line-height:1.1; letter-spacing:-.03em;
  margin:26px 0 26px; font-weight:700;
}
.hero h1 .line{ display:block; }
.hero-sub{ font-size:clamp(15.5px,1.5vw,18px); color:var(--tx-2); max-width:560px; }
.hero-sub b{ color:var(--tx); font-weight:600; }
.hero-actions{ display:flex; flex-wrap:wrap; gap:14px; margin-top:38px; }
.hero-note{
  display:flex; align-items:center; gap:9px; margin-top:26px;
  font-size:13.5px; color:var(--tx-3);
}
.hero-note svg{ width:15px; height:15px; color:var(--c4); flex:none; }

/* chat demo */
.chat-card{
  position:relative; border-radius:var(--r-lg);
  border:1px solid var(--line);
  background:#fff;
  box-shadow:var(--shadow-lg);
}
.chat-card::before{
  content:""; position:absolute; inset:-1px; border-radius:inherit; padding:1px;
  background:linear-gradient(150deg,rgba(42,91,238,.42),transparent 40%,rgba(124,58,237,.3));
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  -webkit-mask-composite:xor; mask-composite:exclude; pointer-events:none;
}
.chat-bar{
  display:flex; align-items:center; gap:9px;
  padding:14px 18px; border-bottom:1px solid var(--line-soft);
  background:#F8FAFE;
}
.chat-bar i{ width:9px;height:9px;border-radius:50%; background:#DCE3F1; }
.chat-bar i:nth-child(1){ background:#E6CCD4; }
.chat-bar i:nth-child(2){ background:#E7DFC4; }
.chat-bar i:nth-child(3){ background:#CFE6D9; }
.chat-bar .t{ margin-left:6px; font-size:12.5px; color:var(--tx-3); letter-spacing:.06em; }
.chat-bar .live{
  margin-left:auto; display:inline-flex; align-items:center; gap:6px;
  font-size:11px; color:var(--c4); letter-spacing:.1em; font-weight:600;
}
.chat-bar .live::before{ content:""; width:5px;height:5px;border-radius:50%;background:var(--c4); box-shadow:0 0 0 3px rgba(14,159,110,.16); }
.chat-body{ padding:24px 22px 26px; display:flex; flex-direction:column; gap:16px; min-height:394px; }

.msg{ display:flex; gap:11px; opacity:0; transform:translateY(10px);
  animation:msgIn .5s var(--ease) forwards; }
@keyframes msgIn{ to{opacity:1;transform:none} }
.msg:nth-child(1){ animation-delay:.15s; }
.msg:nth-child(2){ animation-delay:1.0s; }
.msg:nth-child(3){ animation-delay:2.0s; }
.msg:nth-child(4){ animation-delay:3.0s; }
.msg .av{
  width:30px;height:30px;border-radius:9px;flex:none; display:grid;place-items:center;
  font-size:11px; font-weight:700; letter-spacing:.02em;
}
.msg.user .av{ background:#EFF3FC; color:var(--tx-2); border:1px solid var(--line); }
.msg.ai .av{ background:var(--grad); color:#fff; }
.msg .bub{
  border-radius:14px; padding:12px 15px; font-size:14px; line-height:1.7;
  border:1px solid var(--line-soft); background:#F7F9FD; color:var(--tx-2);
  max-width:calc(100% - 42px);
}
.msg.user .bub{ background:#EFF3FE; border-color:#DCE4FB; color:var(--tx); }
.msg.ai .bub{ background:#F8FAFE; }
.msg.ai .bub b{ color:var(--tx); font-weight:600; }
.msg.ai .bub .hl{
  color:#fff; background:linear-gradient(115deg,#2A5BEE,#1E78D8); padding:1px 7px; border-radius:6px;
  font-weight:700; white-space:nowrap;
}
.msg .src{
  display:flex; flex-wrap:wrap; gap:7px; margin-top:11px;
  padding-top:11px; border-top:1px dashed var(--line);
}
.msg .src span{
  font-size:11px; color:var(--tx-3); padding:3px 9px;
  border:1px solid var(--line); border-radius:100px; background:#fff;
}
.caret{
  display:inline-block; width:2px; height:15px; vertical-align:-2px;
  background:var(--c1); margin-left:3px; animation:blink 1s steps(2) infinite;
}
@keyframes blink{ 50%{opacity:0} }

.chat-foot{
  padding:13px 18px; border-top:1px solid var(--line-soft);
  display:flex; align-items:center; gap:10px; font-size:12px; color:var(--tx-3);
  background:#F8FAFE; border-radius:0 0 var(--r-lg) var(--r-lg);
}
.chat-foot .dot{ width:5px;height:5px;border-radius:50%;background:var(--c1); box-shadow:0 0 0 3px rgba(42,91,238,.14); }

.float-badge{
  position:absolute; border-radius:16px; padding:12px 16px;
  background:#fff; border:1px solid var(--line);
  box-shadow:var(--shadow);
  font-size:12px; color:var(--tx-3); line-height:1.5;
}
.float-badge b{ display:block; font-size:19px; color:var(--tx); font-weight:700; letter-spacing:-.02em; }
.float-badge.f1{ left:-26px; bottom:74px; animation:floaty 5.5s ease-in-out infinite; }
.float-badge.f2{ right:-20px; top:66px; animation:floaty 6.8s ease-in-out infinite reverse; }
@keyframes floaty{ 50%{ transform:translateY(-12px); } }

/* ------------------------------------------------------------- trust bar */
.trust{ position:relative; z-index:1; padding:34px 0 8px; }
.trust-label{
  text-align:center; font-size:12.5px; letter-spacing:.2em; color:var(--tx-4);
  text-transform:uppercase; margin-bottom:26px;
}
.marquee{
  position:relative; overflow:hidden;
  mask-image:linear-gradient(90deg,transparent,#000 12%,#000 88%,transparent);
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 12%,#000 88%,transparent);
}
.marquee-track{ display:flex; gap:14px; width:max-content; animation:slide 38s linear infinite; }
.marquee:hover .marquee-track{ animation-play-state:paused; }
@keyframes slide{ to{ transform:translateX(-50%); } }
.pill{
  display:inline-flex; align-items:center; gap:9px;
  padding:10px 20px; border-radius:100px;
  border:1px solid var(--line); background:#fff;
  box-shadow:var(--shadow-xs);
  font-size:14px; color:var(--tx-2); white-space:nowrap;
  transition:border-color .3s var(--ease),color .3s var(--ease),box-shadow .3s var(--ease),transform .3s var(--ease);
}
.pill:hover{ border-color:var(--line-strong); color:var(--tx); transform:translateY(-2px); box-shadow:var(--shadow); }
.pill em{
  width:7px;height:7px;border-radius:50%; background:var(--pc,var(--c1)); flex:none;
  box-shadow:0 0 0 3px color-mix(in srgb,var(--pc,#2A5BEE) 16%,transparent);
}

/* ------------------------------------------------------------ stat cards */
.stats{ display:grid; grid-template-columns:repeat(4,1fr); gap:18px; }
.stat{
  position:relative; padding:30px 26px; border-radius:var(--r);
  border:1px solid var(--line); background:#fff;
  box-shadow:var(--shadow-xs);
  overflow:hidden; transition:border-color .4s var(--ease),transform .5s var(--ease),box-shadow .4s var(--ease);
}
.stat::after{
  content:""; position:absolute; left:26px; right:26px; top:0; height:2px; border-radius:2px;
  background:var(--grad); opacity:.9;
}
.stat:hover{ border-color:var(--line-strong); transform:translateY(-5px); box-shadow:var(--shadow); }
.stat b{ display:block; font-size:clamp(30px,3.4vw,42px); font-weight:700;
  letter-spacing:-.03em; margin-bottom:8px; }
.stat p{ font-size:14px; color:var(--tx-2); }
.stat small{ display:block; margin-top:10px; font-size:11.5px; color:var(--tx-4); }

/* -------------------------------------------------------------- compare */
.compare{
  border:1px solid var(--line); border-radius:var(--r-lg);
  background:#fff; box-shadow:var(--shadow);
  overflow:hidden;
}
.compare-row{
  display:grid; grid-template-columns:1.1fr 1.5fr 1.5fr;
  border-bottom:1px solid var(--line-soft);
}
.compare-row:last-child{ border-bottom:0; }
.compare-row > div{ padding:22px 24px; font-size:14.5px; }
.compare-row > div+div{ border-left:1px solid var(--line-soft); }
.compare-head{ background:#F6F9FE; }
.compare-head > div{ font-size:13px; letter-spacing:.1em; color:var(--tx-3); text-transform:uppercase; font-weight:600; }
.compare-head .g{ color:var(--c1); display:flex; align-items:center; gap:8px; }
.compare-head .g svg{ width:15px;height:15px; }
.compare-row .k{ color:var(--tx); font-weight:600; background:#FBFCFE; }
.compare-row .seo{ color:var(--tx-3); }
.compare-row .geo{ color:var(--tx); background:rgba(14,140,168,.05); }
.compare-row .geo b{ color:var(--c2); }

/* ------------------------------------------------------------------ grid */
.grid-3{ display:grid; grid-template-columns:repeat(3,1fr); gap:20px; }
.grid-2{ display:grid; grid-template-columns:repeat(2,1fr); gap:20px; }
.grid-4{ display:grid; grid-template-columns:repeat(4,1fr); gap:18px; }

.card{
  position:relative; padding:32px 28px; border-radius:var(--r);
  border:1px solid var(--line); background:#fff;
  box-shadow:var(--shadow-xs);
  overflow:hidden;
  transition:border-color .45s var(--ease),transform .5s var(--ease),box-shadow .45s var(--ease);
}
.card::before{
  content:""; position:absolute; inset:0; opacity:0; transition:opacity .5s var(--ease);
  background:radial-gradient(520px circle at var(--mx,50%) var(--my,0%),rgba(42,91,238,.07),transparent 62%);
}
.card:hover::before{ opacity:1; }
.card:hover{ border-color:var(--line-strong); transform:translateY(-6px); box-shadow:var(--shadow); }
.card > *{ position:relative; z-index:1; }
.card h3{ font-size:19px; margin-bottom:12px; }
.card p{ font-size:14.5px; color:var(--tx-2); }
.card .idx{
  font-size:12px; letter-spacing:.14em; color:var(--tx-4); font-weight:700;
  display:block; margin-bottom:18px;
}
.ico{
  width:48px; height:48px; border-radius:13px; display:grid; place-items:center;
  border:1px solid #DDE5F8;
  background:linear-gradient(150deg,#E9EFFF,#F6F9FF);
  margin-bottom:20px;
}
.ico svg{ width:22px; height:22px; color:var(--c1); }
.ico.v{ background:linear-gradient(150deg,#F0EAFF,#F8F5FF); border-color:#E4DCF9; }
.ico.v svg{ color:var(--c3); }
.ico.m{ background:linear-gradient(150deg,#E4F7EF,#F3FCF8); border-color:#CFEBE0; }
.ico.m svg{ color:var(--c4); }
.card ul.ticks{ margin-top:18px; display:flex; flex-direction:column; gap:10px; }
.card ul.ticks li{ position:relative; padding-left:22px; font-size:13.8px; color:var(--tx-2); }
.card ul.ticks li::before{
  content:""; position:absolute; left:0; top:8px; width:11px; height:6px;
  border-left:1.9px solid var(--c1); border-bottom:1.9px solid var(--c1);
  transform:rotate(-45deg);
}

/* -------------------------------------------------------------- process */
.timeline{ position:relative; }
.timeline::before{
  content:""; position:absolute; left:23px; top:12px; bottom:12px; width:2px; border-radius:2px;
  background:linear-gradient(180deg,transparent,#D9E3F8 12%,#D9E3F8 88%,transparent);
}
.tl-item{ position:relative; padding:0 0 40px 72px; }
.tl-item:last-child{ padding-bottom:0; }
.tl-item .node{
  position:absolute; left:0; top:0; width:47px; height:47px; border-radius:14px;
  display:grid; place-items:center; font-size:15px; font-weight:700;
  border:1px solid var(--line-strong); background:#fff;
  color:var(--c1); z-index:1; box-shadow:var(--shadow-xs);
  transition:box-shadow .4s var(--ease),color .4s var(--ease),border-color .4s var(--ease);
}
.tl-item:hover .node{ box-shadow:0 0 0 5px rgba(42,91,238,.09); color:#1E4BD8; border-color:#BFCDEF; }
.tl-item h3{ font-size:18px; margin-bottom:8px; }
.tl-item p{ font-size:14.3px; color:var(--tx-2); max-width:760px; }
.tl-item .meta{ display:flex; flex-wrap:wrap; gap:8px; margin-top:14px; }
.tl-item .meta span{
  font-size:11.5px; padding:4px 11px; border-radius:100px;
  border:1px solid var(--line); color:var(--tx-3); background:#F8FAFE;
}

/* ------------------------------------------------------------- indus/ind */
.ind{
  display:flex; align-items:flex-start; gap:14px;
  padding:22px 22px; border-radius:var(--r-sm);
  border:1px solid var(--line); background:#fff;
  box-shadow:var(--shadow-xs);
  transition:border-color .4s var(--ease),box-shadow .4s var(--ease),transform .4s var(--ease);
}
.ind:hover{ border-color:var(--line-strong); transform:translateY(-4px); box-shadow:var(--shadow); }
.ind .ico{ width:40px;height:40px;border-radius:11px;margin:0; flex:none; }
.ind .ico svg{ width:18px;height:18px; }
.ind h4{ font-size:15.5px; margin-bottom:6px; }
.ind p{ font-size:13px; color:var(--tx-3); line-height:1.65; }

/* ----------------------------------------------------------------- case */
.case{
  position:relative; border-radius:var(--r-lg); overflow:hidden;
  border:1px solid var(--line);
  background:#fff; box-shadow:var(--shadow);
  padding:34px 30px;
  transition:border-color .45s var(--ease),transform .5s var(--ease),box-shadow .45s var(--ease);
}
.case::after{
  content:""; position:absolute; left:30px; right:30px; top:0; height:2px; border-radius:2px;
  background:var(--grad); opacity:.85;
}
.case:hover{ border-color:var(--line-strong); transform:translateY(-6px); box-shadow:var(--shadow-lg); }
.case .tag{
  display:inline-block; font-size:11.5px; letter-spacing:.1em; padding:5px 12px;
  border-radius:100px; border:1px solid #CFE1E8; color:var(--c2);
  background:rgba(14,140,168,.06); margin-bottom:20px; font-weight:600;
}
.case h3{ font-size:20px; margin-bottom:12px; }
.case > p{ font-size:14.2px; color:var(--tx-2); }
.case .metrics{
  display:grid; grid-template-columns:repeat(3,1fr); gap:1px; margin-top:26px;
  border:1px solid var(--line-soft); border-radius:var(--r-sm); overflow:hidden;
  background:var(--line-soft);
}
.case .metrics div{ background:#FAFCFF; padding:16px 12px; text-align:center; }
.case .metrics b{ display:block; font-size:22px; font-weight:700; letter-spacing:-.02em; }
.case .metrics span{ font-size:11.5px; color:var(--tx-3); }
.case .foot{
  margin-top:22px; padding-top:18px; border-top:1px dashed var(--line);
  font-size:12.5px; color:var(--tx-4);
}

/* -------------------------------------------------------------- pricing */
.price-wrap{ display:grid; grid-template-columns:repeat(3,1fr); gap:20px; align-items:start; }
.price{
  position:relative; border-radius:var(--r-lg);
  border:1px solid var(--line); background:#fff;
  box-shadow:var(--shadow-xs);
  padding:36px 30px; display:flex; flex-direction:column;
  transition:border-color .45s var(--ease),transform .5s var(--ease),box-shadow .45s var(--ease);
}
.price:hover{ border-color:var(--line-strong); transform:translateY(-6px); box-shadow:var(--shadow); }
.price.hot{
  border-color:#BFCFF7;
  background:linear-gradient(170deg,#F4F7FF,#FCFBFF 55%,#FFFFFF);
  box-shadow:var(--shadow-glow);
}
.price.hot::after{
  content:"最受欢迎"; position:absolute; top:-13px; left:50%; transform:translateX(-50%);
  font-size:11.5px; letter-spacing:.12em; padding:5px 16px; border-radius:100px;
  background:var(--grad); color:#fff; font-weight:700; white-space:nowrap;
  box-shadow:0 8px 20px -8px rgba(42,91,238,.65);
}
.price h3{ font-size:20px; margin-bottom:8px; }
.price .desc{ font-size:13.5px; color:var(--tx-3); min-height:44px; }
.price .amt{ margin:22px 0 6px; display:flex; align-items:baseline; gap:6px; }
.price .amt b{ font-size:38px; font-weight:700; letter-spacing:-.03em; }
.price .amt i{ font-style:normal; font-size:14px; color:var(--tx-3); }
.price .for{ font-size:12.5px; color:var(--tx-4); margin-bottom:24px; }
.price ul{ display:flex; flex-direction:column; gap:12px; margin-bottom:30px; flex:1; }
.price ul li{ position:relative; padding-left:24px; font-size:14px; color:var(--tx-2); }
.price ul li::before{
  content:""; position:absolute; left:2px; top:8px; width:11px; height:6px;
  border-left:1.9px solid var(--c1); border-bottom:1.9px solid var(--c1);
  transform:rotate(-45deg);
}
.price ul li.off{ color:var(--tx-4); }
.price ul li.off::before{ border-color:var(--tx-4); opacity:.55; }

/* ------------------------------------------------------------------ faq */
.faq{ border-top:1px solid var(--line); }
.faq-item{ border-bottom:1px solid var(--line); }
.faq-q{
  width:100%; display:flex; align-items:flex-start; justify-content:space-between; gap:24px;
  padding:26px 4px; text-align:left;
  font-size:16.5px; font-weight:600; color:var(--tx);
  transition:color .3s var(--ease);
}
.faq-q:hover{ color:var(--c1); }
.faq-q .ic{
  width:26px; height:26px; flex:none; border-radius:8px; position:relative;
  border:1px solid var(--line-strong); background:#F7F9FE; margin-top:2px;
}
.faq-q .ic::before,.faq-q .ic::after{
  content:""; position:absolute; top:50%; left:50%; background:var(--tx-2);
  transform:translate(-50%,-50%); transition:transform .35s var(--ease),opacity .3s var(--ease);
}
.faq-q .ic::before{ width:11px; height:1.5px; }
.faq-q .ic::after{ width:1.5px; height:11px; }
.faq-item.open .faq-q .ic::after{ transform:translate(-50%,-50%) rotate(90deg); opacity:0; }
.faq-item.open .faq-q{ color:var(--c1); }
.faq-a{ max-height:0; overflow:hidden; transition:max-height .5s var(--ease); }
.faq-a .inner{ padding:0 60px 28px 4px; color:var(--tx-2); font-size:14.8px; }
.faq-a .inner p+p{ margin-top:12px; }
.faq-a .inner strong{ color:var(--tx); }

/* ---------------------------------------------------------------- cta */
.cta-band{
  position:relative; border-radius:var(--r-xl); overflow:hidden;
  border:1px solid #DCE5F8;
  background:linear-gradient(150deg,#F3F7FF,#F7FBFF 42%,#FAF6FF);
  box-shadow:var(--shadow);
  padding:76px 56px; text-align:center;
}
.cta-band::before{
  content:""; position:absolute; inset:0;
  background-image:
    linear-gradient(to right,rgba(42,91,238,.055) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(42,91,238,.055) 1px,transparent 1px);
  background-size:52px 52px;
  mask-image:radial-gradient(ellipse 70% 100% at 50% 100%,#000,transparent 72%);
  -webkit-mask-image:radial-gradient(ellipse 70% 100% at 50% 100%,#000,transparent 72%);
}
.cta-band > *{ position:relative; z-index:1; }
.cta-band h2{ font-size:clamp(26px,3.4vw,42px); margin-bottom:18px; }
.cta-band p{ color:var(--tx-2); max-width:620px; margin-inline:auto; }
.cta-band .acts{ display:flex; flex-wrap:wrap; gap:14px; justify-content:center; margin-top:36px; }

/* ---------------------------------------------------------------- forms */
.form{ display:grid; gap:18px; }
.field{ display:flex; flex-direction:column; gap:9px; }
.field label{ font-size:13px; color:var(--tx-2); font-weight:600; }
.field label i{ color:#E0534E; font-style:normal; }
.field input,.field textarea,.field select{
  width:100%; padding:14px 16px; border-radius:var(--r-sm);
  border:1px solid var(--line); background:#FBFCFE;
  font-size:14.5px; color:var(--tx); outline:none;
  transition:border-color .3s var(--ease),background .3s var(--ease),box-shadow .3s var(--ease);
}
.field textarea{ resize:vertical; min-height:118px; line-height:1.7; }
.field input::placeholder,.field textarea::placeholder{ color:var(--tx-4); }
.field input:focus,.field textarea:focus,.field select:focus{
  border-color:#9FB6F2; background:#fff;
  box-shadow:0 0 0 4px rgba(42,91,238,.1);
}
.field select{ appearance:none;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%237482A3' stroke-width='2.4'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat:no-repeat; background-position:right 16px center;
}
.form-2{ display:grid; grid-template-columns:1fr 1fr; gap:18px; }
.agree{ display:flex; gap:10px; align-items:flex-start; font-size:12.5px; color:var(--tx-3); line-height:1.7; }
.agree input{ width:16px;height:16px; margin-top:3px; accent-color:var(--c1); flex:none; }
.form-ok{
  display:none; padding:18px 20px; border-radius:var(--r-sm);
  border:1px solid #C6EAD9; background:#F1FBF6;
  color:#0B7A55; font-size:14px;
}
.form-ok.show{ display:block; }

/* --------------------------------------------------------------- footer */
.footer{
  position:relative; z-index:1; margin-top:40px;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,#FBFCFE,#F5F8FE);
  padding:72px 0 34px;
}
.foot-grid{ display:grid; grid-template-columns:1.6fr 1fr 1fr 1.2fr; gap:44px; }
.foot-brand p{ font-size:13.8px; color:var(--tx-3); margin-top:20px; max-width:320px; }
.foot-social{ display:flex; gap:10px; margin-top:24px; }
.foot-social a{
  width:38px;height:38px;border-radius:11px; display:grid;place-items:center;
  border:1px solid var(--line); background:#fff; color:var(--tx-3);
  box-shadow:var(--shadow-xs);
  transition:color .3s var(--ease),border-color .3s var(--ease),transform .3s var(--ease);
}
.foot-social a:hover{ color:var(--c1); border-color:var(--line-strong); transform:translateY(-3px); }
.foot-social svg{ width:17px;height:17px; }
.foot-col h4{ font-size:13.5px; letter-spacing:.1em; color:var(--tx); margin-bottom:20px; text-transform:uppercase; font-weight:700; }
.foot-col ul{ display:flex; flex-direction:column; gap:12px; }
.foot-col a,.foot-col li{ font-size:13.8px; color:var(--tx-3); transition:color .28s var(--ease); }
.foot-col a:hover{ color:var(--c1); }
.foot-bot{
  margin-top:56px; padding-top:26px; border-top:1px solid var(--line);
  display:flex; flex-wrap:wrap; gap:14px; justify-content:space-between; align-items:center;
  font-size:12.5px; color:var(--tx-4);
}
.foot-bot .links{ display:flex; gap:20px; flex-wrap:wrap; }
.foot-bot a:hover{ color:var(--tx-2); }

/* --------------------------------------------------------- page header */
.page-head{
  position:relative; z-index:1;
  padding:calc(var(--nav-h) + 78px) 0 66px;
  border-bottom:1px solid var(--line);
}
.page-head .eyebrow{ margin-bottom:22px; }
.page-head h1{ font-size:clamp(30px,4.4vw,54px); letter-spacing:-.03em; margin-bottom:20px; }
.page-head p{ color:var(--tx-2); max-width:660px; font-size:clamp(15px,1.4vw,17.5px); }
.crumb{ display:flex; gap:9px; align-items:center; font-size:12.5px; color:var(--tx-4); margin-bottom:24px; }
.crumb a:hover{ color:var(--tx-2); }
.crumb svg{ width:12px;height:12px; }

/* ----------------------------------------------------------------- misc */
.note{
  margin-top:22px; padding:16px 20px; border-radius:var(--r-sm);
  border:1px dashed var(--line-strong); background:#FAFCFF;
  font-size:13px; color:var(--tx-3); line-height:1.75;
}
.note b{ color:var(--tx-2); }
.divider{ height:1px; background:var(--line); margin:0; border:0; }
.kv{ display:grid; gap:14px; }
.kv-row{ display:flex; gap:16px; align-items:flex-start; font-size:14.2px; color:var(--tx-2); }
.kv-row svg{ width:17px;height:17px; color:var(--c1); flex:none; margin-top:4px; }
.kv-row b{ color:var(--tx); font-weight:600; }
.chip-row{ display:flex; flex-wrap:wrap; gap:9px; }
.chip{
  font-size:12.5px; padding:6px 14px; border-radius:100px;
  border:1px solid var(--line); background:#fff; color:var(--tx-2);
  box-shadow:var(--shadow-xs);
}

/* -------------------------------------------------------- refinements */
[id]{ scroll-margin-top:calc(var(--nav-h) + 26px); }
a.card, a.ind{ display:block; color:inherit; }
a.ind{ display:flex; }
.chat-card{ overflow:visible; }
.chat-bar{ border-radius:var(--r-lg) var(--r-lg) 0 0; }
.price ul li strong{ color:var(--tx); font-weight:600; }
.cta-band .eyebrow{ background:#fff; }
.page-head + .sec{ padding-top:88px; }
.br-desk{ display:inline; }

/* ------------------------------------------------------- scroll reveal */
.rv{ opacity:0; transform:translateY(26px);
  transition:opacity .8s var(--ease),transform .8s var(--ease); }
.rv.in{ opacity:1; transform:none; }
@media (prefers-reduced-motion:reduce){
  .rv{ opacity:1; transform:none; }
  .marquee-track,.bg-fx .orb{ animation:none !important; }
}

/* --------------------------------------------------------------- to top */
.totop{
  position:fixed; right:22px; bottom:24px; z-index:90;
  width:46px;height:46px;border-radius:14px; display:grid;place-items:center;
  border:1px solid var(--line-strong); background:rgba(255,255,255,.92);
  backdrop-filter:blur(14px); color:var(--tx-2);
  box-shadow:var(--shadow);
  opacity:0; transform:translateY(14px); pointer-events:none;
  transition:opacity .4s var(--ease),transform .4s var(--ease),color .3s var(--ease);
}
.totop.show{ opacity:1; transform:none; pointer-events:auto; }
.totop:hover{ color:var(--c1); }
.totop svg{ width:18px;height:18px; }

/* ================================================================ media */
@media (max-width:1080px){
  .hero-grid{ grid-template-columns:1fr; gap:56px; }
  .hero-sub{ max-width:none; }
  .float-badge.f1{ left:-8px; bottom:56px; }
  .float-badge.f2{ right:-8px; }
  .grid-4{ grid-template-columns:repeat(2,1fr); }
  .stats{ grid-template-columns:repeat(2,1fr); }
  .foot-grid{ grid-template-columns:1fr 1fr; gap:38px; }
}
@media (max-width:960px){
  .pc-only{ display:none; }
  .nav-links{ display:none; }
  .nav-cta .btn-ghost{ display:none; }
  .burger{ display:grid; }
  .grid-3{ grid-template-columns:1fr; }
  .grid-2{ grid-template-columns:1fr; }
  .price-wrap{ grid-template-columns:1fr; max-width:480px; margin-inline:auto; }
  .compare-row{ grid-template-columns:1fr; }
  .compare-row > div+div{ border-left:0; border-top:1px solid var(--line-soft); }
  .compare-row .k{ background:#F6F9FE; font-size:13px;
    letter-spacing:.08em; text-transform:uppercase; color:var(--tx-3); padding-bottom:12px; }
  .compare-head{ display:none; }
  .compare-row .seo::before{ content:"传统 SEO · "; color:var(--tx-4); }
  .compare-row .geo::before{ content:"GEO · "; color:var(--c2); font-weight:600; }
  .sec{ padding:84px 0; }
}
@media (max-width:680px){
  :root{ --nav-h:64px; --r-lg:22px; --r-xl:26px; }
  .wrap{ padding-inline:18px; }
  .sec{ padding:68px 0; }
  .sec-head{ margin-bottom:44px; }
  .hero{ padding-top:calc(var(--nav-h) + 48px); }
  .hero-actions .btn{ flex:1 1 auto; }
  .float-badge{ display:none; }
  .chat-body{ padding:20px 16px 22px; min-height:auto; }
  .msg .bub{ font-size:13.4px; }
  .stats{ grid-template-columns:1fr 1fr; gap:12px; }
  .stat{ padding:22px 18px; }
  .card{ padding:26px 22px; }
  .case{ padding:26px 22px; }
  .case::after{ left:22px; right:22px; }
  .case .metrics b{ font-size:18px; }
  .price{ padding:30px 24px; }
  .cta-band{ padding:52px 22px; }
  .tl-item{ padding-left:62px; }
  .timeline::before{ left:20px; }
  .tl-item .node{ width:41px;height:41px;border-radius:12px; font-size:14px; }
  .faq-q{ font-size:15.4px; padding:22px 2px; gap:16px; }
  .faq-a .inner{ padding:0 20px 24px 2px; font-size:14px; }
  .form-2{ grid-template-columns:1fr; }
  .foot-grid{ grid-template-columns:1fr; gap:34px; }
  .foot-bot{ flex-direction:column; align-items:flex-start; }
  .grid-4{ grid-template-columns:1fr; }
  .totop{ right:14px; bottom:16px; }
  .page-head{ padding-top:calc(var(--nav-h) + 52px); }
}