/* ============================================================
   点击创客 · GEO — Design System & Shared Styles
   Colors: #F5F5F0 bg · #2E2E2E text · #4A6FA5 accent · #8C8C8C muted
   ============================================================ */

   @import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;500;700&family=Roboto:wght@300;400;500;700&display=swap');

   /* ── Reset ──────────────────────────────────────────────── */
   *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
   html { scroll-behavior: smooth; font-size: 16px; }
   body {
     font-family: 'Noto Sans SC', 'Roboto', -apple-system, sans-serif;
     background: #F5F5F0;
     color: #2E2E2E;
     line-height: 1.7;
     -webkit-font-smoothing: antialiased;
   }
   img { max-width: 100%; display: block; }
   a { color: inherit; text-decoration: none; }
   ul { list-style: none; }
   
   /* ── Tokens ─────────────────────────────────────────────── */
   :root {
     --bg:       #F5F5F0;
     --bg-card:  #FFFFFF;
     --text:     #2E2E2E;
     --accent:   #4A6FA5;
     --accent-dk:#3A5C8F;
     --muted:    #8C8C8C;
     --border:   #E0DDD8;
     --dark:     #1C1C1C;
     --dark2:    #252525;
     --radius:   6px;
     --shadow:   0 1px 4px rgba(0,0,0,.08);
     --shadow-md:0 4px 16px rgba(0,0,0,.10);
     --max-w:    1200px;
     --section-py: 96px;
   }
   
   /* ── Typography ─────────────────────────────────────────── */
   h1, h2, h3, h4 { font-weight: 700; line-height: 1.25; letter-spacing: -.01em; }
   h1 { font-size: clamp(2rem, 4vw, 3.25rem); }
   h2 { font-size: clamp(1.6rem, 3vw, 2.25rem); }
   h3 { font-size: clamp(1.1rem, 2vw, 1.4rem); }
   h4 { font-size: 1rem; font-weight: 500; }
   p  { color: #4A4A4A; }
   .text-muted { color: var(--muted); }
   .text-accent { color: var(--accent); }
   .text-center { text-align: center; }
   .font-roboto { font-family: 'Roboto', sans-serif; }
   
   /* ── Layout ─────────────────────────────────────────────── */
   .container { max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }
   .section { padding: var(--section-py) 0; }
   .section--dark { background: var(--dark); color: #E8E8E2; }
   .section--dark p { color: #B0AFA8; }
   .section--gray { background: #EEEDE8; }
   
   .grid-2  { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
   .grid-3  { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
   .grid-4  { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
   .flex    { display: flex; }
   .flex-center { display: flex; align-items: center; justify-content: center; }
   .gap-8   { gap: 8px; }
   .gap-16  { gap: 16px; }
   .gap-24  { gap: 24px; }
   
   /* ── Navigation ─────────────────────────────────────────── */
   .nav {
     position: fixed; top: 0; left: 0; width: 100%; z-index: 100;
     background: rgba(245, 245, 240, .95);
     backdrop-filter: blur(10px);
     border-bottom: 1px solid var(--border);
     transition: box-shadow .2s;
   }
   .nav.scrolled { box-shadow: var(--shadow-md); }
   .nav__inner {
     display: flex; align-items: center; justify-content: space-between;
     max-width: var(--max-w); margin: 0 auto; padding: 0 24px; height: 82px;
   }
   .nav__logo {
     display: flex; align-items: center; gap: 10px;
     font-size: 1.85rem; 
     font-weight: 700; letter-spacing: .02em;
     color: var(--text);
   }
   .nav__logo-img {
     height: 100px;
     width: auto;
     max-width: 120px;
     object-fit: contain;
     flex-shrink: 0;
   }
   /* 产品线名 GEO（仅内层 span，避免与 nav__logo-brand 外层 span 冲突） */
   .nav__logo-brand {
     color: #8e7138;
   }
   
   .nav__logo-brand > span,
   .nav__logo > span:not(.nav__logo-brand) {
     font-weight: 600; 
     /* font-size: 1.85rem; */
     letter-spacing: .08em; margin-left: 4px;
   }
   .nav__links { display: flex; gap: 8px; align-items: center; }
   /* 顶栏 hover / active 背景与交互落在 li 上 */
   .nav__links > li:not(:last-child) {
     border-radius: var(--radius);
     transition: background .15s ease;
   }
   .nav__links > li:not(:last-child):hover,
   .nav__links > li:not(:last-child).active {
     background: rgba(74,111,165,.1);
   }
   .nav__links a {
     font-size: .875rem; font-weight: 400; color: var(--text);
     padding: 6px 12px;
     border-radius: var(--radius);
     display: inline-block;
     transition: color .15s ease;
   }
   .nav__links > li:not(:last-child):hover > a,
   .nav__links > li:not(:last-child).active > a {
     color: var(--accent);
   }
   .nav__links > li:last-child a {
    background: var(--accent); color: #fff !important;
    padding: 8px 18px !important; border-radius: var(--radius);
    font-weight: 500 !important;
  }
  .nav__links > li:last-child a:hover {
    background: var(--accent-dk) !important;
  }
  .perf-layer-card {
    display: grid;
    grid-template-columns: 60px 1fr auto;
    gap: 32px;
    align-items: start;
    padding: 48px 0;
    border-bottom: 1px solid var(--border);
  }
  .perf-layer-card:last-child { border-bottom: none; }
  .perf-layer-card__num {
    font-family: 'Roboto', sans-serif;
    font-size: 3.5rem;
    font-weight: 700;
    color: rgba(74,111,165,.15);
    line-height: 1;
    padding-top: 4px;
  }
  .perf-layer-card__body { flex: 1; }
  .perf-layer-card__icons { display: flex; gap: 10px; margin-bottom: 16px; flex-wrap: wrap; }
  .perf-layer-card__icon-tag {
    display: flex; align-items: center; gap: 6px;
    background: rgba(74,111,165,.08); border: 1px solid rgba(74,111,165,.2);
    border-radius: 20px; padding: 4px 12px;
    font-size: .775rem; color: var(--accent);
  }
  .perf-layer-card__icon-tag svg { width: 13px; height: 13px; stroke: var(--accent); fill: none; }
  .perf-layer-card__stat {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 20px 24px;
    min-width: 200px; text-align: center;
  }
  .perf-layer-card__stat-num {
    font-family: 'Roboto', sans-serif; font-size: 2rem; font-weight: 700;
    color: var(--accent); line-height: 1; margin-bottom: 6px;
  }
  .perf-layer-card__stat-label { font-size: .775rem; color: var(--muted); }
  @media (max-width: 768px) {
    .perf-layer-card {
      grid-template-columns: 1fr;
      gap: 12px;
      padding: 28px 0;
    }
    .perf-layer-card__num {
      font-size: 2rem;
      padding-top: 0;
      margin-bottom: -4px;
    }
    .perf-layer-card__icons {
      gap: 8px;
      margin-bottom: 12px;
    }
    .perf-layer-card__stat { display: none; }
  }
   .nav__toggle {
     display: none;
     cursor: pointer;
     flex-direction: column;
     align-items: center;
     justify-content: center;
     gap: 5px;
     width: 42px;
     height: 42px;
     flex-shrink: 0;
     border-radius: 8px;
     border: 1.5px solid var(--border);
     background: transparent;
     transition: background .15s, border-color .15s;
     -webkit-tap-highlight-color: transparent;
   }
   .nav__toggle:hover,
   .nav__toggle:focus-visible {
     background: rgba(74,111,165,.08);
     border-color: rgba(74,111,165,.35);
     outline: none;
   }
   .nav__toggle span {
     display: block;
     width: 20px;
     height: 2px;
     background: var(--text);
     border-radius: 2px;
     transform-origin: center;
     transition: transform .25s ease, opacity .2s ease;
   }
   .nav__toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
   .nav__toggle.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
   .nav__toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
   
   /* ── Nav dropdown (新闻与洞察) ───────────────────────────── */
   .nav__item--dropdown {
     position: relative;
   }
   .nav__trigger {
     display: inline-flex;
     align-items: center;
     gap: 5px;
   }
   .nav__caret {
     width: 10px;
     height: 10px;
     flex-shrink: 0;
     opacity: .65;
     transition: transform .2s ease;
   }
   /* 桌面：展开由 li:hover / focus-within 控制 */
   .nav__links > li.nav__item--dropdown:hover .nav__caret,
   .nav__links > li.nav__item--dropdown:focus-within .nav__caret {
     transform: rotate(180deg);
   }
   .nav__dropdown {
     position: absolute;
     left: 0;
     top: 100%;
     padding-top: 8px;
     min-width: 200px;
     opacity: 0;
     visibility: hidden;
     transform: translateY(-6px);
     transition: opacity .2s ease, transform .2s ease, visibility .2s;
     pointer-events: none;
     z-index: 200;
   }
   .nav__links > li.nav__item--dropdown:hover .nav__dropdown,
   .nav__links > li.nav__item--dropdown:focus-within .nav__dropdown {
     opacity: 1;
     visibility: visible;
     transform: translateY(0);
     pointer-events: auto;
   }
   .nav__dropdown-inner {
     list-style: none;
     margin: 0;
     padding: 6px 0;
     background: var(--bg-card);
     border: 1px solid var(--border);
     border-radius: var(--radius);
     box-shadow: var(--shadow-md);
   }
   .nav__dropdown-inner li {
     transition: background .15s ease;
   }
   .nav__dropdown-inner li + li {
     border-top: 1px solid rgba(224,221,216,.6);
   }
   .nav__dropdown-inner li:hover {
     background: rgba(74,111,165,.08);
   }
   .nav__dropdown-inner li:hover > a {
     color: var(--accent);
   }
   .nav__dropdown-inner a {
     display: block;
     padding: 10px 18px;
     font-size: .8125rem;
     font-weight: 400;
     white-space: nowrap;
     border-radius: 0;
     transition: color .15s ease;
   }
   
   /* 移动端：子菜单默认收起，由 .is-open 控制（样式见下方 media query） */
   
   /* ── Buttons ─────────────────────────────────────────────── */
   .btn {
     display: inline-flex; align-items: center; gap: 8px;
     padding: 12px 28px; border-radius: var(--radius);
     font-size: .9rem; font-weight: 500; cursor: pointer;
     border: none; transition: all .15s;
   }
   .btn-primary { background: var(--accent); color: #fff; }
   .btn-primary:hover { background: var(--accent-dk); transform: translateY(-1px); box-shadow: 0 4px 12px rgba(74,111,165,.3); }
   .btn-outline { background: transparent; color: var(--accent); border: 1.5px solid var(--accent); }
   .btn-outline:hover { background: var(--accent); color: #fff; }
   .btn-ghost { background: rgba(255,255,255,.1); color: #fff; border: 1.5px solid rgba(255,255,255,.3); }
   .btn-ghost:hover { background: rgba(255,255,255,.2); }
   .btn-sm { padding: 8px 18px; font-size: .825rem; }
   
   /* ── Cards ───────────────────────────────────────────────── */
   .card {
     background: var(--bg-card); border: 1px solid var(--border);
     border-radius: var(--radius); padding: 32px;
     box-shadow: var(--shadow); transition: box-shadow .2s, transform .2s;
   }
   .card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
   .card--dark { background: var(--dark2); border-color: rgba(255,255,255,.08); color: #E8E8E2; }
   .card--accent-top { border-top: 3px solid var(--accent); }
   
   /* ── Section header ──────────────────────────────────────── */
   .section-header { margin-bottom: 56px; }
   .section-header.text-center { text-align: center; }
   .section-label {
     display: inline-block; font-size: .75rem; font-weight: 500; letter-spacing: .1em;
     text-transform: uppercase; color: var(--accent);
     background: rgba(74,111,165,.08); padding: 4px 12px;
     border-radius: 20px; margin-bottom: 16px;
   }
   .section-header h2 { margin-bottom: 16px; }
   .section-header p { color: var(--muted); max-width: 600px; font-size: 1.05rem; }
   .section-header.text-center p { margin: 0 auto; }
   
   /* ── Divider ─────────────────────────────────────────────── */
   .divider { border: none; border-top: 1px solid var(--border); margin: 0; }
   
   /* ── Tags ────────────────────────────────────────────────── */
   .tag {
     display: inline-block; font-size: .75rem; font-weight: 500;
     padding: 3px 10px; border-radius: 12px; background: rgba(74,111,165,.1);
     color: var(--accent);
   }
   
   /* ── Icon box ────────────────────────────────────────────── */
   .icon-box {
     width: 52px; height: 52px; border-radius: 12px;
     background: rgba(74,111,165,.1);
     display: flex; align-items: center; justify-content: center;
     flex-shrink: 0;
   }
   .icon-box svg { width: 24px; height: 24px; stroke: var(--accent); fill: none; }
   .icon-box--lg { width: 64px; height: 64px; border-radius: 16px; }
   .icon-box--lg svg { width: 30px; height: 30px; }
   
   /* ── Stats ───────────────────────────────────────────────── */
   .stat-num {
     font-family: 'Roboto', sans-serif; font-size: 2.5rem; font-weight: 700;
     color: var(--accent); line-height: 1;
   }
   .stat-label { font-size: .85rem; color: var(--muted); margin-top: 6px; }
   
   /* ── Step / Process ──────────────────────────────────────── */
   .step-num {
     width: 36px; height: 36px; border-radius: 50%;
     background: var(--accent); color: #fff;
     font-size: .85rem; font-weight: 700;
     display: flex; align-items: center; justify-content: center;
     flex-shrink: 0;
   }
   
   /* ── Hero ────────────────────────────────────────────────── */
   .hero {
     min-height: 100vh; display: flex; align-items: center;
     background: var(--dark);
     position: relative; overflow: hidden;
     padding: 120px 0 80px;
   }
   .hero__bg {
     position: absolute; inset: 0; z-index: 0;
     background:
       radial-gradient(ellipse 60% 50% at 70% 50%, rgba(74,111,165,.18) 0%, transparent 70%),
       radial-gradient(ellipse 40% 60% at 20% 80%, rgba(74,111,165,.08) 0%, transparent 60%);
   }
   .hero__grid-overlay {
     position: absolute; inset: 0; z-index: 0;
     background-image:
       linear-gradient(rgba(74,111,165,.06) 1px, transparent 1px),
       linear-gradient(90deg, rgba(74,111,165,.06) 1px, transparent 1px);
     background-size: 60px 60px;
   }
   .hero__content { position: relative; z-index: 1; }
   .hero__label {
     font-size: .75rem; font-weight: 500; letter-spacing: .15em;
     text-transform: uppercase; color: var(--accent); margin-bottom: 20px;
   }
   .hero h1 { color: #FFFFFF; margin-bottom: 24px; }
   .hero h1 em { font-style: normal; color: var(--accent); }
   .hero__sub { font-size: 1.15rem; color: #9A9A94; max-width: 560px; margin-bottom: 40px; }
   .hero__actions { display: flex; gap: 16px; flex-wrap: wrap; }
   .hero__visual {
     position: relative; z-index: 1;
     display: flex; align-items: center; justify-content: center;
   }
   
   /* Hero 大 logo：轨道上的小图标位置叠加轻微金色闪动光晕（不改变底图） */
   .geo-sphere-wrap {
     position: relative;
     width: 340px;
     max-width: min(100%, 340px);
     line-height: 0;
   }
   .geo-sphere-wrap .geo-sphere-img {
     display: block;
     width: 100%;
     height: auto;
   }
   .geo-orbit-glow {
     position: absolute;
     width: 10.5%;
     height: 10.5%;
     border-radius: 50%;
     pointer-events: none;
     transform: translate(-50%, -50%);
     background: radial-gradient(
       circle at 50% 50%,
       rgba(255, 220, 160, 0.22) 0%,
       rgba(255, 190, 100, 0.08) 52%,
       transparent 72%
     );
     box-shadow: 0 0 0 0 rgba(255, 200, 120, 0);
     opacity: 0.45;
     animation: geo-orbit-glow-pulse 2.6s ease-in-out infinite;
   }
   .geo-orbit-glow--1 { left: 9%; top: 27%; animation-delay: 0s; }
   .geo-orbit-glow--2 { left: 28.5%; top: 28%; animation-delay: 0.4s; }
   .geo-orbit-glow--3 { left: 88%; top: 21%; animation-delay: 0.8s; }
   .geo-orbit-glow--4 { left: 78%; top: 55%; animation-delay: 1.2s; }
   .geo-orbit-glow--5 { left: 89.5%; top: 78%; animation-delay: 1.6s; }
   .geo-orbit-glow--6 { left: 14.5%; top: 77%; animation-delay: 2s; }
   @keyframes geo-orbit-glow-pulse {
     0%, 100% {
       opacity: 0.38;
       box-shadow:
         0 0 0 0 rgba(255, 200, 120, 0.12),
         0 0 6px 0 rgba(255, 200, 120, 0.1);
       transform: translate(-50%, -50%) scale(1);
     }
     50% {
       opacity: 0.92;
       box-shadow:
         0 0 0 1px rgba(255, 220, 160, 0.35),
         0 0 14px 6px rgba(255, 200, 120, 0.28),
         0 0 28px 4px rgba(255, 180, 80, 0.12);
       transform: translate(-50%, -50%) scale(1.07);
     }
   }
   @media (prefers-reduced-motion: reduce) {
     .geo-orbit-glow {
       animation: none;
       opacity: 0.55;
       box-shadow: 0 0 10px 2px rgba(255, 200, 120, 0.2);
     }
   }
   
   /* ── Trust bar ───────────────────────────────────────────── */
   .trust-bar {
     background: #FFFFFF; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
     padding: 32px 0;
   }
   .trust-bar__inner {
     display: flex; align-items: center; gap: 48px; flex-wrap: wrap;
     justify-content: center;
   }
   .trust-bar__label { font-size: .8rem; color: var(--muted); font-weight: 500; white-space: nowrap; }
   .trust-bar__items { display: flex; gap: 40px; align-items: center; flex-wrap: wrap; }
   .trust-bar__item { font-size: .85rem; color: #8C8C8C; font-weight: 500; letter-spacing: .05em; }
   
   /* ── Feature list ────────────────────────────────────────── */
   .feature-item { display: flex; gap: 16px; }
   .feature-item + .feature-item { margin-top: 24px; }
   
   /* ── Diagram / Visual placeholder ───────────────────────── */
   .diagram {
     background: linear-gradient(135deg, #1C2535 0%, #243044 100%);
     border-radius: 12px; padding: 32px;
     border: 1px solid rgba(74,111,165,.2);
   }
   
   /* ── Keyword cloud ───────────────────────────────────────── */
   .kw-cloud { display: flex; flex-wrap: wrap; gap: 10px; }
   .kw-tag {
     padding: 6px 14px; border-radius: 20px; font-size: .825rem; font-weight: 500;
     border: 1px solid var(--border); color: var(--text);
     transition: all .15s;
   }
   .kw-tag:hover { background: var(--accent); color: #fff; border-color: var(--accent); }
   .kw-tag--core { background: rgba(74,111,165,.1); border-color: rgba(74,111,165,.3); color: var(--accent); }
   
   /* ── Performance layers ──────────────────────────────────── */
   .perf-layer {
     display: grid; grid-template-columns: 80px 1fr 260px; gap: 32px; align-items: start;
     padding: 40px 0; border-bottom: 1px solid var(--border);
   }
   .perf-layer:last-child { border-bottom: none; }
   .perf-layer__num {
     font-family: 'Roboto', sans-serif; font-size: 3rem; font-weight: 700;
     color: rgba(74,111,165,.2); line-height: 1;
   }
   .perf-layer__data {
     background: var(--bg-card); border: 1px solid var(--border);
     border-radius: var(--radius); padding: 20px;
   }
   .perf-layer__data-num {
     font-family: 'Roboto', sans-serif; font-size: 1.8rem; font-weight: 700;
     color: var(--accent); line-height: 1;
   }
   
   /* ── ROI chart (CSS) ─────────────────────────────────────── */
   .bar-chart { display: flex; align-items: flex-end; gap: 12px; height: 120px; }
   .bar-chart__col { flex: 1; display: flex; flex-direction: column; align-items: center; gap: 8px; }
   .bar-chart__bar {
     width: 100%; border-radius: 4px 4px 0 0;
     background: rgba(74,111,165,.2);
     transition: background .3s;
   }
   .bar-chart__bar--accent { background: var(--accent); }
   .bar-chart__label { font-size: .7rem; color: var(--muted); text-align: center; }
   
   /* ── News card ───────────────────────────────────────────── */
   .news-card { display: flex; flex-direction: column; height: 100%; }
   .news-card__img {
     aspect-ratio: 16/9; background: linear-gradient(135deg, #2E3A50, #3A4F70);
     border-radius: var(--radius) var(--radius) 0 0; overflow: hidden;
     display: flex; align-items: center; justify-content: center;
   }
   .news-card__body { flex: 1; padding: 24px; border: 1px solid var(--border); border-top: none; border-radius: 0 0 var(--radius) var(--radius); }
   .news-card__date { font-size: .775rem; color: var(--muted); margin-bottom: 8px; }
   .news-card__title { font-size: 1rem; font-weight: 600; margin-bottom: 10px; line-height: 1.4; }
   .news-card__excerpt { font-size: .875rem; color: var(--muted); }
   .news-card__tag { margin-bottom: 10px; }
   
   /* ── Form ────────────────────────────────────────────────── */
   .form-group { margin-bottom: 20px; }
   .form-group label { display: block; font-size: .875rem; font-weight: 500; margin-bottom: 6px; }
   .form-group input, .form-group select, .form-group textarea {
     width: 100%; padding: 10px 14px;
     border: 1.5px solid var(--border); border-radius: var(--radius);
     background: #fff; color: var(--text);
     font-family: inherit; font-size: .9rem;
     transition: border-color .15s;
     outline: none;
   }
   .form-group input:focus, .form-group select:focus, .form-group textarea:focus {
     border-color: var(--accent);
     box-shadow: 0 0 0 3px rgba(74,111,165,.1);
   }
   .form-group textarea { resize: vertical; min-height: 120px; }
   .form-check { display: flex; gap: 10px; align-items: flex-start; font-size: .85rem; color: var(--muted); }
   .form-check input { width: auto; margin-top: 3px; }
   
   /* ── SVG illustrations ───────────────────────────────────── */
   .geo-sphere {
     width: 320px; height: 320px;
     border-radius: 50%; overflow: hidden;
     border: 1px solid rgba(74,111,165,.3);
     position: relative;
     background: radial-gradient(circle at 35% 35%, #2A3F6B 0%, #141D30 60%, #0A1020 100%);
   }
   
   /* ── Flow chart ──────────────────────────────────────────── */
   .flow { display: flex; align-items: center; gap: 0; flex-wrap: wrap; }
   .flow__step {
     flex: 1; min-width: 120px; text-align: center;
     padding: 16px 8px;
   }
   .flow__step-box {
     background: rgba(74,111,165,.1); border: 1px solid rgba(74,111,165,.25);
     border-radius: var(--radius); padding: 12px 8px;
     font-size: .825rem; font-weight: 500; color: var(--text);
     margin-bottom: 8px;
   }
   .flow__arrow { color: var(--muted); font-size: 1.2rem; flex-shrink: 0; padding: 0 4px; }
   
   /* ── Page hero (sub pages) ───────────────────────────────── */
   .page-hero {
     background: var(--dark); color: #fff;
     padding: 140px 0 80px;
     position: relative; overflow: hidden;
   }
   .page-hero::before {
     content: ''; position: absolute; inset: 0;
     background:
       radial-gradient(ellipse 50% 80% at 80% 50%, rgba(74,111,165,.15) 0%, transparent 70%);
   }
   .page-hero__content { position: relative; z-index: 1; }
   .page-hero h1 { color: #fff; margin-bottom: 16px; }
   .page-hero p { color: #9A9A94; font-size: 1.1rem; max-width: 600px; }
   
   /* ── Footer ──────────────────────────────────────────────── */
   .footer {
     background: var(--dark); color: #B0AFA8;
     padding: 64px 0 32px;
   }
   .footer__grid {
     display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px;
     padding-bottom: 48px; border-bottom: 1px solid rgba(255,255,255,.08);
     margin-bottom: 32px;
   }
   /* 公司名称 + 产品线 GEO */
   .footer__brand { color: #fff; font-size: 1.45rem; font-weight: 700; margin-bottom: 16px; }
   .footer__brand span { color: var(--accent); font-weight: 600; font-size: 1rem; margin-left: 8px; letter-spacing: .06em; }
   .footer__desc { font-size: .875rem; line-height: 1.7; max-width: 280px; }
   .footer__col-title { font-size: .8rem; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: #fff; margin-bottom: 16px; }
   .footer__links { display: flex; flex-direction: column; gap: 10px; }
   .footer__links a { font-size: .875rem; color: #8C8C8C; transition: color .15s; }
   .footer__links a:hover { color: #fff; }
   .footer__bottom { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; font-size: .8rem; color: #5A5A54; }
   
   /* ── CTA section (accent bg) ─────────────────────────────── */
   .section--cta { background: var(--accent); padding: 64px 0; }
   .section--cta h2 { color: #fff; margin-bottom: 16px; }
   .section--cta p  { color: rgba(255,255,255,.8); margin-bottom: 32px; font-size: 1.05rem; }
   
   /* ── CTA section (dark bg) ───────────────────────────────── */
   .section--cta-dark { background: var(--dark); padding: 64px 0; }
   .section--cta-dark h2 { color: #fff; margin-bottom: 16px; }
   .section--cta-dark p  { color: #9A9A94; margin-bottom: 36px; font-size: 1.05rem; }
   
   /* ── Button white variant & button group ─────────────────── */
   .btn--white { background: #fff; color: var(--accent); }
   .btn--white:hover { background: rgba(255,255,255,.9); transform: translateY(-1px); }
   .btn-group { display: flex; gap: 16px; flex-wrap: wrap; }
   .section--cta .btn-group,
   .section--cta-dark .btn-group { justify-content: center; }
   
   /* ── Sub-navigation bar ──────────────────────────────────── */
   .sub-nav {
     background: #fff; border-bottom: 1px solid var(--border);
     position: sticky; top: 64px; z-index: 50;
   }
   .sub-nav__inner { display: flex; overflow-x: auto; }
   .sub-nav__link {
     display: inline-block; padding: 16px 24px;
     font-size: .875rem; font-weight: 500;
     color: var(--muted); border-bottom: 2px solid transparent;
     white-space: nowrap; transition: color .15s;
   }
   .sub-nav__link:hover { color: var(--accent); }
   
   /* ── Callout box (左边框高亮块) ──────────────────────────── */
   .callout {
     background: var(--bg); border-radius: var(--radius);
     padding: 20px 24px; border-left: 4px solid var(--accent); margin-bottom: 24px;
   }
   .callout__title { font-weight: 600; color: var(--text); margin-bottom: 4px; }
   .callout p { font-size: .9rem; color: var(--muted); margin: 0; }
   
   /* ── Info box (白底/bg底带边框) ──────────────────────────── */
   .info-box { background: var(--bg); border-radius: var(--radius); padding: 24px; border: 1px solid var(--border); }
   .info-box__title { font-size: .8rem; font-weight: 600; color: var(--muted); margin-bottom: 16px; text-transform: uppercase; letter-spacing: .05em; }
   .info-box__hint  { font-size: .775rem; color: var(--muted); margin-bottom: 8px; }
   
   /* ── Bullet item list ────────────────────────────────────── */
   .bullet-list { display: flex; flex-direction: column; gap: 12px; }
   .bullet-item  { display: flex; gap: 12px; align-items: flex-start; }
   .bullet-item__dot {
     width: 6px; height: 6px; border-radius: 50%;
     background: var(--accent); flex-shrink: 0; margin-top: 8px;
   }
   
   /* ── Step num arrow variant ──────────────────────────────── */
   .step-num--arrow { background: rgba(74,111,165,.15); color: var(--accent); }
   
   /* ── Value bar (白底横幅，用于页面顶部声明) ──────────────── */
   .value-bar { background: #fff; border-bottom: 1px solid var(--border); padding: 40px 0; }
   .value-bar__text {
     font-size: 1.2rem; font-weight: 600; color: var(--text);
     max-width: 700px; margin: 0 auto; line-height: 1.6; text-align: center;
   }
   
   /* ── Statement bar (绩优三点横排) ────────────────────────── */
   .statement-bar { background: #fff; padding: 48px 0; border-bottom: 1px solid var(--border); }
   .statement-bar__inner {
     display: flex; gap: 32px; align-items: center;
     justify-content: center; flex-wrap: wrap; text-align: center;
   }
   .statement-bar__item  { font-size: 1.1rem; font-weight: 600; color: var(--text); }
   .statement-bar__arrow { color: var(--accent); font-size: 1.5rem; font-weight: 300; }
   
   /* ── Form 2-col row ──────────────────────────────────────── */
   .form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
   
   /* ── Container narrow ────────────────────────────────────── */
   .container.container--narrow { max-width: 760px; }
   
   /* ── Max-width centered block ────────────────────────────── */
   .mw-800 { max-width: 800px; margin-left: auto; margin-right: auto; }
   
   /* ── Social card (媒体矩阵渠道卡片) ──────────────────────── */
   .social-card { padding: 20px; background: var(--bg); border-radius: var(--radius); border: 1px solid var(--border); }
   .social-card__name { font-weight: 600; margin-bottom: 8px; font-size: .9rem; }
   .social-card p { font-size: .825rem; color: var(--muted); margin: 0; }
   
   /* ── Content tag row (媒体内容形态行) ───────────────────── */
   .content-tag-row {
     display: flex; justify-content: space-between; align-items: center;
     padding: 10px 14px; background: #fff;
     border-radius: var(--radius); border: 1px solid var(--border);
   }
   .content-tag-row__name { font-size: .875rem; font-weight: 500; }
   
   /* ── Grid-2 方向翻转（右列在前） ─────────────────────────── */
   .grid-2--flip { direction: rtl; }
   .grid-2--flip > * { direction: ltr; }
   
   /* ── Section label 小间距变体 ────────────────────────────── */
   .section-label--sm { margin-bottom: 4px; }
   
   /* ── Performance quote 引用块 ────────────────────────────── */
   .perf-quote {
     font-size: .85rem; color: var(--muted);
     padding-left: 52px; border-left: 3px solid rgba(74,111,165,.35);
   }
   
   /* ── Result badge (案例数据高亮框) ──────────────────────── */
   .result-badge {
     background: rgba(74,111,165,.08); border-radius: var(--radius);
     padding: 12px 16px; font-size: .825rem;
     color: var(--accent); font-weight: 500; text-align: center;
   }
   
   /* ── Footer bottom links ─────────────────────────────────── */
   .footer__bottom-links { display: flex; gap: 20px; }
   .footer__bottom a { color: #5A5A54; transition: color .15s; }
   .footer__bottom a:hover { color: #fff; }
   
   /* ── Whitepaper promo block ──────────────────────────────── */
   .wp-promo {
     background: linear-gradient(135deg, #1C2535, #243044);
     border-radius: 12px; padding: 48px;
     display: flex; align-items: center; justify-content: space-between;
     gap: 32px; flex-wrap: wrap;
   }
   .wp-promo__eyebrow {
     font-size: .75rem; font-weight: 500; letter-spacing: .1em;
     text-transform: uppercase; color: var(--accent); margin-bottom: 12px;
   }
   .wp-promo__title   { color: #fff; margin-bottom: 12px; }
   .wp-promo__desc    { color: #9A9A94; max-width: 480px; }
   .wp-promo__meta    { display: flex; gap: 12px; margin-top: 24px; flex-wrap: wrap; }
   .wp-promo__meta-item { display: flex; align-items: center; gap: 6px; font-size: .825rem; color: #9A9A94; }
   .wp-promo__actions { display: flex; flex-direction: column; gap: 12px; }
   
   /* ── Scroll reveal ───────────────────────────────────────── */
   .reveal { opacity: 0; transform: translateY(24px); transition: opacity .6s ease, transform .6s ease; }
   .reveal.visible { opacity: 1; transform: translateY(0); }
   .reveal-delay-1 { transition-delay: .1s; }
   .reveal-delay-2 { transition-delay: .2s; }
   .reveal-delay-3 { transition-delay: .3s; }
   
   /* ── Utility ─────────────────────────────────────────────── */
   .mb-8  { margin-bottom: 8px; }
   .mb-12 { margin-bottom: 12px; }
   .mb-16 { margin-bottom: 16px; }
   .mb-24 { margin-bottom: 24px; }
   .mb-32 { margin-bottom: 32px; }
   .mb-48 { margin-bottom: 48px; }
   .mt-8  { margin-top: 8px; }
   .mt-16 { margin-top: 16px; }
   .mt-24 { margin-top: 24px; }
   .mt-32 { margin-top: 32px; }
   .mt-48 { margin-top: 48px; }
   .pt-0  { padding-top: 0; }
   .pb-0  { padding-bottom: 0; }
   .w-full { width: 100%; }
   
   /* ── Responsive ──────────────────────────────────────────── */
   @media (max-width: 1024px) {
     .grid-3 { grid-template-columns: 1fr 1fr; }
     .grid-4 { grid-template-columns: 1fr 1fr; }
     .footer__grid { grid-template-columns: 1fr 1fr; gap: 32px; }
   }
   
   @media (max-width: 768px) {
     :root { --section-py: 64px; }
     /* 顶栏 logo +「金色GEO」：限制图高、收敛字号，与 82px 顶栏对齐（不改顶栏高度） */
     .nav__logo {
       gap: 8px;
       font-size: 1.2rem;
       line-height: 1;
       align-items: center;
     }
     .nav__logo-img {
       height: auto;
       max-height: 46px;
       width: auto;
       max-width: 84px;
       object-fit: contain;
       flex-shrink: 0;
       align-self: center;
     }
     .nav__logo-brand {
       display: inline-flex;
       align-items: center;
       line-height: 1.05;
     }
     .nav__logo-brand > span {
       margin-left: 3px;
     }
     .nav__links { display: none; flex-direction: column; position: absolute; top: 82px; left: 0; width: 100%; background: rgba(245,245,240,.98); padding: 16px 24px; border-bottom: 1px solid var(--border); gap: 4px; align-items: stretch; }
     .nav__links.open { display: flex; }
     .nav__toggle { display: flex; }
     .nav__item--dropdown { width: 100%; }
     .nav__links > .nav__item--dropdown > .nav__trigger {
       width: 100%;
       justify-content: space-between;
       padding: 10px 12px;
       border-radius: var(--radius);
       -webkit-tap-highlight-color: transparent;
     }
     .nav__links > .nav__item--dropdown:active {
       background: rgba(74,111,165,.06);
     }
     /* 移动端：下拉区与桌面 hover 解耦，仅用 display + .is-open */
     .nav__item--dropdown .nav__dropdown {
       position: static !important;
       padding-top: 0 !important;
       min-width: 0 !important;
       display: none !important;
       opacity: 1 !important;
       visibility: visible !important;
       transform: none !important;
       pointer-events: auto !important;
       box-shadow: none !important;
     }
     .nav__item--dropdown.is-open .nav__dropdown {
       display: block !important;
     }
     /* 展开时箭头朝上 */
     .nav__links > li.nav__item--dropdown.is-open .nav__caret {
       transform: rotate(180deg);
       opacity: .85;
     }
     .nav__links > li.nav__item--dropdown:hover .nav__caret {
       transform: none;
     }
     .nav__dropdown-inner {
       margin: 6px 0 10px 0;
       padding: 6px 0;
       border: none;
       border-radius: 8px;
       background: rgba(74,111,165,.06);
       box-shadow: inset 0 0 0 1px rgba(74,111,165,.12);
     }
     .nav__dropdown-inner li + li a {
       border-top: 1px solid rgba(74,111,165,.1);
     }
     .nav__dropdown-inner a {
       padding: 12px 16px 12px 20px;
       white-space: normal;
       font-size: .8125rem;
       color: var(--text);
       border-radius: 0;
     }
     .nav__dropdown-inner li:hover {
       background: rgba(74,111,165,.1);
     }
     .nav__dropdown-inner li:hover > a {
       color: var(--accent);
     }
     .nav__dropdown-inner li:first-child a {
       border-radius: 8px 8px 0 0;
     }
     .nav__dropdown-inner li:last-child a {
       border-radius: 0 0 8px 8px;
     }
     .hero { padding: 100px 0 60px; }
     .grid-2 { grid-template-columns: 1fr; }
     .grid-2 .hero__visual { display: none; }
     .grid-3 { grid-template-columns: 1fr; }
     .grid-4 { grid-template-columns: 1fr 1fr; }
     .perf-layer { grid-template-columns: 48px 1fr; }
     .perf-layer__data { display: none; }
     .footer__grid {
       grid-template-columns: repeat(3, 1fr);
       gap: 20px 16px;
     }
     .footer__grid > div:first-child {
       grid-column: 1 / -1;
       padding-bottom: 20px;
       border-bottom: 1px solid rgba(255,255,255,.06);
     }
     .footer__desc { max-width: 100%; font-size: .825rem; }
     .footer__col-title { margin-bottom: 12px; font-size: .75rem; }
     .footer__links { gap: 8px; }
     .footer__links a { font-size: .8rem; }
     .flow { flex-direction: column; }
     .flow__arrow { transform: rotate(90deg); }
   
     /* ── Trust bar mobile ────────────────────────────────── */
     .trust-bar__sep { display: none; }
     .trust-bar__inner { flex-direction: column; gap: 12px; align-items: center; }
     .trust-bar__items { gap: 8px 10px; justify-content: center; }
     .trust-bar__item {
       padding: 5px 14px;
       background: rgba(74,111,165,.06);
       border: 1px solid rgba(74,111,165,.15);
       border-radius: 20px;
       font-size: .8rem;
       color: #6a6a6a;
       letter-spacing: .03em;
     }
   
     /* ── Nav mobile menu ──────────────────────────────────── */
     .nav__links .nav__cta {
       display: block;
       text-align: center;
       margin-top: 4px;
     }
   
     /* ── CTA sections ─────────────────────────────────────── */
     .section--cta, .section--cta-dark { padding: 56px 0; }
     .form-row { grid-template-columns: 1fr; }
     .grid-2--flip { direction: ltr; }
     .wp-promo { padding: 28px 20px; }
     .wp-promo__actions { flex-direction: row; flex-wrap: wrap; justify-content: center; }
   
     /* ── Section header 间距收紧 ─────────────────────────── */
     .section-header { margin-bottom: 40px; }
   
     /* ── 绩优逻辑引用块手机端去掉左缩进 ──────────────────── */
     .perf-quote { padding-left: 16px; }
   
     /* ── Footer bottom 手机端垂直居中排列 ────────────────── */
     .footer__bottom { flex-direction: column; align-items: center; text-align: center; }
   }
   
   @media (max-width: 480px) {
     .grid-4 { grid-template-columns: 1fr; }
     h1 { font-size: 1.75rem; }
     .hero { padding: 88px 0 48px; }
     .hero__sub { font-size: 1rem; }
     .hero__actions { flex-direction: column; gap: 12px; }
     .hero__actions .btn { width: 100%; justify-content: center; }
     .trust-bar { padding: 24px 0; }
     .stat-num { font-size: 2rem; }
     .section--cta, .section--cta-dark { padding: 48px 0; }
     .diagram { padding: 20px; }
     .card { padding: 24px; }
     .btn-group .btn { width: 100%; justify-content: center; }
   }

   /* ── 路径图专用样式 ─────────────────────────────────────── */
   @media (max-width: 768px) {
    .kw-flow-card {
      padding: 24px !important;
      margin-bottom: 32px !important;
    }
    .kw-flow-grid {
      grid-template-columns: 1fr !important;
      gap: 4px !important;
    }
    .kw-flow-arrow {
      padding-top: 0 !important;
      text-align: center;
      justify-content: center !important;
    }
    .kw-flow-arrow > div {
      font-size: 1.2rem !important;
      display: inline-block;
      transform: rotate(90deg);
    }
    .kw-flow-col-label {
      text-align: left !important;
      font-size: .75rem !important;
    }
    /* 社交卡片手机端单列 */
    .grid-4 { grid-template-columns: 1fr 1fr; }
  }
  @media (max-width: 480px) {
    .grid-4 { grid-template-columns: 1fr; }
  }