@charset "UTF-8";
/* =========================================================
   广州牵牵科技 · AI 营销官网
   纯静态样式表（零构建 / 零外部依赖 / 离线可用）
   分区：01 令牌 → 02 基础 → 03 通用组件 → 04 板块 → 05 响应式
   ========================================================= */

/* ========== 01. 设计令牌 ========== */
:root{
  /* 背景 */
  --bg-base:      #04060E;
  --bg-footer:    #02040B;
  --bg-card:      #0A1026;
  --bg-card-hi:   #0D1730;
  --bg-cta-a:     #05081F;
  --bg-cta-b:     #0D081F;

  /* 主色 */
  --cyan:         #00E6FF;
  --purple:       #7D5CFF;
  --grad-main:    linear-gradient(90deg, #00E6FF 0%, #7D5CFF 100%);
  --grad-hero-text: linear-gradient(90deg, #4DF2FF 0%, #D9E6FF 50%, #BF80FF 100%);

  /* 文本 */
  --text-1:       #FFFFFF;
  --text-2:       #E8EDFF;
  --text-3:       #93A1C0;
  --text-4:       #6B7A9C;
  --text-5:       #5A6885;
  --text-mono:    #5A6B8C;

  /* 描边 */
  --line-1:       rgba(255,255,255,0.07);
  --line-2:       rgba(255,255,255,0.12);
  --line-cyan:    rgba(0,230,255,0.32);

  /* 强调色（数据用） */
  --amber:        #FFB347;
  --violet:       #A87CFF;

  /* 尺寸 */
  --container:    1200px;
  --radius-card:  20px;
  --radius-sm:    12px;
  --section-y:    110px;

  /* 阴影 / 发光 */
  --glow-cyan:    0 0 24px rgba(0,230,255,0.40);
  --glow-cyan-sm: 0 0 16px rgba(0,230,255,0.35);
  --shadow-card:  0 30px 60px rgba(0,0,0,0.50);

  /* 字体 */
  --font-sans: "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans SC", "Hiragino Sans GB", sans-serif;
  --font-mono: ui-monospace, "JetBrains Mono", Consolas, "Courier New", monospace;
  --font-num: "Bahnschrift", "DIN Alternate", "Arial Narrow", "PingFang SC", "Microsoft YaHei", sans-serif;

  /*  Header 高度（锚点偏移用） */
  --header-h: 76px;
}

/* ========== 02. 基础与重置 ========== */
*,*::before,*::after{ box-sizing:border-box; }

html{
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 12px);
  -webkit-text-size-adjust:100%;
}

body{
  margin:0;
  background: var(--bg-base);
  color: var(--text-3);
  font-family: var(--font-sans);
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

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

:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  border-radius:4px;
}

.skip-link{
  position:absolute; left:-9999px; top:0; z-index:999;
  background:var(--cyan); color:#05101F; padding:10px 18px; border-radius:0 0 10px 0;
  font-size:14px;
}
.skip-link:focus{ left:0; }

/* 内容区净宽 = --container(1200)，左右 20px 为窄屏安全边距 */
.container{
  width:100%;
  max-width: calc(var(--container) + 40px);
  margin:0 auto;
  padding:0 20px;
}

/* ========== 03. 通用组件 ========== */

/* 按钮 */
.btn{
  display:inline-flex; align-items:center; justify-content:center;
  height:42px; padding:0 20px;
  border-radius:10px;
  font-size:14px; font-weight:500;
  white-space:nowrap;
  transition: transform .25s ease, box-shadow .25s ease, background-color .25s ease, border-color .25s ease, color .25s ease;
}
.btn--primary{
  background: var(--grad-main);
  color:#05101F;
  font-weight:600;
  box-shadow: var(--glow-cyan);
}
.btn--primary:hover{ transform:translateY(-2px); box-shadow:0 0 34px rgba(0,230,255,.58); }

.btn--ghost{
  border:1px solid rgba(255,255,255,0.18);
  color: var(--text-2);
  background: rgba(255,255,255,0.02);
}
.btn--ghost:hover{ border-color: rgba(0,230,255,.45); color: var(--cyan); }

.btn--outline{
  border:1px solid rgba(255,255,255,0.16);
  background: rgba(255,255,255,0.03);
  color: var(--text-2);
}
.btn--outline:hover{ border-color: rgba(0,230,255,.42); background: rgba(0,230,255,.06); color:#fff; }

.btn--lg{ height:52px; padding:0 30px; font-size:15px; border-radius:12px; }

/* 眉标 / 胶囊 / 标签 */
.eyebrow{
  display:block;
  font-family: var(--font-mono);
  font-size:12px; letter-spacing:2px;
  color: var(--text-mono);
  margin-bottom:14px;
}

.chip{
  display:inline-flex; align-items:center;
  height:28px; padding:0 14px;
  border-radius:999px;
  font-size:12px; font-weight:500;
  background: rgba(255,255,255,0.04);
  border:1px solid var(--line-2);
  color: var(--text-2);
}
.chip--cyan{
  background: rgba(0,230,255,0.08);
  border-color: var(--line-cyan);
  color: var(--cyan);
}
.chip--lg{ height:34px; padding:0 18px; font-size:13px; }

.tags{ display:flex; flex-wrap:wrap; gap:8px; }
.tags li{
  height:28px; padding:0 12px;
  display:inline-flex; align-items:center;
  border-radius:999px;
  font-size:12px;
  background: rgba(255,255,255,0.05);
  border:1px solid var(--line-1);
  color: var(--text-3);
}

/* 板块标题组 */
.section{ padding: var(--section-y) 0; }
.section-head{ max-width:760px; margin-bottom:52px; }
.section-head--center{ max-width:760px; margin-left:auto; margin-right:auto; text-align:center; }
.section-title{
  font-size:42px; line-height:1.25; font-weight:800;
  color: var(--text-1);
  letter-spacing:-.5px;
  margin-bottom:16px;
}
.section-title--md{ font-size:40px; font-weight:700; color: var(--text-2); }
.section-desc{ font-size:16px; line-height:1.8; color: var(--text-3); }
.sub-title{ text-align:center; font-size:24px; font-weight:700; color:var(--text-2); margin:76px 0 34px; }

/* 指标 */
.metric{ display:flex; align-items:baseline; gap:8px; }
.metric__value{
  font-family: var(--font-num);
  font-size:24px; font-weight:700; color: var(--text-1);
  font-variant-numeric: tabular-nums;
}
.metric__label{ font-size:12px; color: var(--text-4); }
.metric--sm .metric__value{ font-size:22px; }
.metric--pair{ flex-wrap:wrap; gap:6px 10px; margin-top:auto; }
.metric--pair .metric__value{ font-size:26px; }
.metric--pair .metric__label{ font-size:11px; margin-right:14px; }

/* 图标底座 */
.ico{
  width:46px; height:46px;
  display:inline-flex; align-items:center; justify-content:center;
  border-radius:13px;
  background: linear-gradient(135deg, rgba(0,230,255,.16), rgba(125,92,255,.16));
  border:1px solid rgba(0,230,255,.18);
  margin-bottom:18px;
}
.ico--lg{ width:56px; height:56px; border-radius:16px; margin-bottom:20px; }

/* 滚动入场
   隐藏态只在 <html class="js"> 下生效：JS 禁用或 main.js 加载失败时（看门狗摘掉 .js）
   内容直接可见，避免整站空白。 */
.js .reveal{
  opacity:0;
  transform: translateY(24px);
  transition: opacity .7s cubic-bezier(.22,.61,.36,1), transform .7s cubic-bezier(.22,.61,.36,1);
  transition-delay: var(--d, 0ms);
  will-change: opacity, transform;
}
.js .reveal.is-in{ opacity:1; transform:none; }

/* ========== 04-1. Header ========== */
.site-header{
  position:sticky; top:0; z-index:100;
  background: rgba(5,10,18,0.90);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  transition: background-color .3s ease, box-shadow .3s ease;
}
.site-header::after{
  content:"";
  position:absolute; left:0; right:0; bottom:0; height:1px;
  background: linear-gradient(90deg, transparent, rgba(0,230,255,0.4), transparent);
}
.site-header.is-scrolled{
  background: rgba(3,6,14,0.96);
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
  box-shadow: 0 8px 30px rgba(0,0,0,.45);
}
.site-header__inner{
  max-width:1440px; margin:0 auto;
  padding:18px 120px;
  display:flex; align-items:center; justify-content:space-between; gap:24px;
}

.brand{ display:flex; align-items:center; gap:12px; }
.brand__logo{ flex:0 0 auto; }
.brand__text{ display:flex; flex-direction:column; line-height:1.2; }
.brand__cn{ font-size:16px; font-weight:600; color: var(--text-2); }
.brand__en{
  font-family: var(--font-mono);
  font-size:9px; letter-spacing:1.4px; color: var(--text-4);
  margin-top:3px;
}

.nav{ display:flex; align-items:center; gap:36px; }
.nav__list{ display:flex; align-items:center; gap:30px; }
.nav__link{
  font-size:14px; color: var(--text-3);
  position:relative; padding:4px 0;
  transition: color .25s ease;
}
.nav__link::after{
  content:""; position:absolute; left:0; right:100%; bottom:0; height:1px;
  background: var(--cyan);
  transition: right .3s ease;
}
.nav__link:hover{ color: var(--cyan); }
.nav__link.is-active{ color: var(--cyan); }
.nav__link.is-active::after{ right:0; }

.nav__actions{ display:flex; align-items:center; gap:12px; }

.menu-toggle{
  display:none;
  width:42px; height:42px;
  align-items:center; justify-content:center;
  border-radius:10px;
  border:1px solid var(--line-2);
  color: var(--text-2);
}
.menu-toggle__close{ display:none; }
.menu-toggle[aria-expanded="true"] .menu-toggle__open{ display:none; }
.menu-toggle[aria-expanded="true"] .menu-toggle__close{ display:block; }

/* ========== 04-2. Hero ========== */
.hero{
  position:relative;
  padding: 92px 0 110px;
  overflow:hidden;
  isolation:isolate;
}
.hero__grid{
  position:absolute; inset:0; z-index:-2;
  background-image:
    repeating-linear-gradient(90deg, rgba(255,255,255,.18) 0 1px, transparent 1px 80px),
    repeating-linear-gradient(0deg, rgba(255,255,255,.18) 0 1px, transparent 1px 80px);
  -webkit-mask-image: radial-gradient(circle at 50% 26%, #000 0%, transparent 72%);
  mask-image: radial-gradient(circle at 50% 26%, #000 0%, transparent 72%);
}
.hero__glow{ position:absolute; z-index:-1; pointer-events:none; }
.hero__glow--tl{
  top:-220px; left:-140px; width:640px; height:640px;
  background: radial-gradient(circle, rgba(0,230,255,.22) 0%, rgba(0,230,255,0) 66%);
}
.hero__glow--b{
  bottom:-320px; left:50%; transform:translateX(-50%);
  width:1200px; height:760px;
  background: radial-gradient(ellipse at center, rgba(0,230,255,.16) 0%, rgba(125,92,255,.18) 46%, rgba(125,92,255,0) 72%);
}

.hero__inner{ text-align:center; display:flex; flex-direction:column; align-items:center; }

.badge{
  display:inline-flex; align-items:center; gap:9px;
  height:34px; padding:0 18px;
  border-radius:999px;
  background: rgba(255,255,255,0.05);
  border:1px solid var(--line-2);
  color:#9FE9FF;
  font-size:13px; font-weight:500;
}
.badge__dot{
  width:7px; height:7px; border-radius:50%;
  background: var(--cyan);
  box-shadow: 0 0 10px rgba(0,230,255,.9);
  animation: pulseDot 2.2s ease-in-out infinite;
}
@keyframes pulseDot{ 0%,100%{opacity:1} 50%{opacity:.35} }

.hero__title{ margin:26px 0 0; }
.hero__title-line{
  display:block;
  font-size:66px; line-height:1.18; font-weight:900;
  letter-spacing:-1px;
  color: var(--text-1);
}
.hero__title-line--grad{
  background: var(--grad-hero-text);
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
  color:transparent;
}
.hero__sub{
  margin-top:24px;
  max-width:780px;
  font-size:17px; line-height:1.75; color: var(--text-3);
}
.hero__actions{ display:flex; gap:14px; margin-top:38px; flex-wrap:wrap; justify-content:center; }
.hero__trust{ margin-top:22px; font-size:13px; color:#5A6B8C; }

.hero__stats{
  display:flex; align-items:center; justify-content:center;
  gap:56px; margin-top:56px;
}
/* dt 在前（语义），用 column-reverse 让数值视觉上位于标签之上 */
.hero__stat{
  text-align:center; position:relative;
  display:flex; flex-direction:column-reverse; align-items:center;
}
.hero__stat + .hero__stat::before{
  content:""; position:absolute; left:-28px; top:6px; bottom:10px; width:1px;
  background: var(--line-2);
}
.hero__stat-num{
  font-family: var(--font-num);
  font-size:38px; font-weight:700; line-height:1.1;
  color: var(--text-1);
  font-variant-numeric: tabular-nums;
}
.hero__stat-num .unit{ font-size:22px; margin-left:2px; color: var(--cyan); }
.hero__stat-label{ margin-top:8px; font-size:13px; color: var(--text-4); }

/* 驾驶舱卡片 */
.cockpit{
  width:100%; max-width:1040px; margin:64px auto 0;
  background: var(--bg-card);
  border:1px solid rgba(255,255,255,0.10);
  border-radius:16px;
  box-shadow: 0 40px 90px rgba(0,0,0,.62);
  overflow:hidden;
  text-align:left;
}
.cockpit__bar{
  display:flex; align-items:center; gap:8px;
  padding:12px 16px;
  border-bottom:1px solid var(--line-1);
}
.dot{ width:10px; height:10px; border-radius:50%; display:block; }
.dot--r{ background:#FF5F57; } .dot--y{ background:#FEBC2E; } .dot--g{ background:#28C840; }
.cockpit__url{
  margin-left:14px; flex:1;
  font-family: var(--font-mono);
  font-size:11px; color: var(--text-4);
  background: rgba(255,255,255,0.03);
  border-radius:6px;
  padding:5px 12px;
}
.cockpit__head{
  display:flex; align-items:center; justify-content:space-between;
  padding:16px 22px;
  border-bottom:1px solid var(--line-1);
}
.cockpit__title{ font-size:13px; font-weight:600; color: var(--text-2); }
.cockpit__live{ display:inline-flex; align-items:center; gap:7px; font-size:11px; color: var(--text-4); }
.pulse{
  width:7px; height:7px; border-radius:50%; background:#28C840;
  box-shadow:0 0 0 0 rgba(40,200,64,.7);
  animation: pulseRing 1.8s ease-out infinite;
}
@keyframes pulseRing{
  0%{ box-shadow:0 0 0 0 rgba(40,200,64,.7); }
  100%{ box-shadow:0 0 0 8px rgba(40,200,64,0); }
}

.cockpit__kpis{
  display:grid; grid-template-columns:repeat(4,1fr);
  gap:14px; padding:18px 22px;
}
.kpi{
  background: rgba(255,255,255,0.025);
  border:1px solid var(--line-1);
  border-radius:12px;
  padding:14px 16px;
  display:flex; flex-direction:column; gap:6px;
}
.kpi__label{ font-size:11px; color: var(--text-4); }
.kpi__value{
  font-family: var(--font-num);
  font-size:30px; font-weight:700; line-height:1; color: var(--text-1);
  font-variant-numeric: tabular-nums;
}
.kpi__delta{ font-size:10px; color: var(--cyan); }

.cockpit__body{
  display:flex; gap:16px;
  padding:0 22px 22px;
}
.panel{
  background: rgba(255,255,255,0.022);
  border:1px solid var(--line-1);
  border-radius:12px;
  padding:16px 18px;
}
.panel--chart{ flex:660 1 0; min-width:0; }
.panel--ai{ flex:320 1 0; min-width:0; }
.panel__head{ display:flex; align-items:center; justify-content:space-between; margin-bottom:16px; gap:10px; }
.panel__title{ font-size:14px; font-weight:600; color: var(--text-2); }
.panel__legend{ display:flex; gap:12px; }
.lg{ display:inline-flex; align-items:center; gap:5px; font-size:11px; color: var(--text-4); }
.lg::before{ content:""; width:8px; height:8px; border-radius:2px; }
.lg--cyan::before{ background: var(--cyan); }
.lg--purple::before{ background: var(--purple); }

.chart{ display:flex; align-items:flex-end; justify-content:space-between; height:150px; gap:8px; }
.chart__bar{
  flex:1 1 0; min-width:0;
  height: var(--h, 40%);
  border-radius:5px 5px 2px 2px;
  background: linear-gradient(180deg, #00E6FF 0%, #7D5CFF 100%);
  opacity:.85;
}

.ai-list{ display:flex; flex-direction:column; gap:10px; }
.ai-item{
  background: rgba(255,255,255,0.03);
  border:1px solid var(--line-1);
  border-radius:10px;
  padding:11px 13px;
}
.ai-item__tag{ display:inline-block; font-size:10px; font-weight:500; margin-bottom:6px; }
.ai-item__tag--cyan{ color: var(--cyan); }
.ai-item__tag--amber{ color: var(--amber); }
.ai-item__tag--violet{ color: var(--violet); }
.ai-item__text{ font-size:12px; line-height:1.7; color: var(--text-3); }

/* ========== 04-3. 核心服务 Bento ========== */
.bento{
  display:grid;
  grid-template-columns: 740fr 440fr;
  grid-template-rows: auto auto;
  gap:20px;
}
.bento__col{ display:flex; flex-direction:column; gap:20px; min-width:0; }

.b-card{
  background: var(--bg-card);
  border:1px solid var(--line-1);
  border-radius: var(--radius-card);
  padding:32px 30px;
  display:flex; flex-direction:column;
  min-width:0;
  transition: transform .3s ease, border-color .3s ease, box-shadow .3s ease;
}
.b-card:hover{
  transform: translateY(-4px);
  border-color: rgba(0,230,255,0.28);
  box-shadow: 0 24px 50px rgba(0,0,0,.45);
}
.b-card--a{ grid-column:1; grid-row:1; min-height:400px; }
.b-card--a .chip{ align-self:flex-start; }
.bento__col{ grid-column:2; grid-row:1; }
.b-card__title{ font-size:22px; font-weight:700; color: var(--text-1); margin-bottom:12px; }
.b-card__title--xl{ font-size:30px; }
.b-card__desc{ font-size:14px; line-height:1.8; color: var(--text-3); }
.b-card--a .tags{ margin-top:20px; }
.b-card .metric{ margin-top:auto; padding-top:22px; }
.b-card--a .metric{ margin-top:auto; padding-top:26px; }

/* ========== 04-4. 工作流程 ========== */
.steps{ display:flex; gap:16px; }
.step{
  flex:0 0 288px; width:288px;
  background: var(--bg-card);
  border:1px solid var(--line-1);
  border-radius: var(--radius-card);
  padding:26px 24px 28px;
  position:relative;
  transition: transform .3s ease, border-color .3s ease, box-shadow .3s ease;
}
.step:hover{ transform:translateY(-4px); border-color:rgba(0,230,255,.24); box-shadow:0 24px 50px rgba(0,0,0,.42); }
.step__no{
  position:absolute; top:18px; right:22px;
  font-family: var(--font-num);
  font-size:54px; font-weight:700; line-height:1;
  color: rgba(255,255,255,0.08);
  font-variant-numeric: tabular-nums;
}
.step__ico{
  width:48px; height:48px; border-radius:14px;
  display:inline-flex; align-items:center; justify-content:center;
  background: var(--grad-main);
  margin-bottom:20px;
  box-shadow: 0 8px 22px rgba(0,230,255,.18);
}
.step__title{ font-size:22px; font-weight:600; color: var(--text-2); margin-bottom:12px; }
.step__desc{ font-size:13px; line-height:1.8; color: var(--text-3); }
.step__points{ margin-top:18px; display:flex; flex-direction:column; gap:9px; }
.step__points li{
  position:relative; padding-left:14px;
  font-size:13px; color: var(--text-4);
}
.step__points li::before{
  content:""; position:absolute; left:0; top:8px;
  width:5px; height:5px; border-radius:50%;
  background: var(--cyan); opacity:.7;
}

/* ========== 04-5. 数据成果 ========== */
.stats-panel{
  display:flex; align-items:center; justify-content:space-between;
  min-height:180px;
  padding:52px 36px;
  background: var(--bg-card);
  border:1px solid transparent;
  border-radius: var(--radius-card);
  background-image:
    linear-gradient(var(--bg-card), var(--bg-card)),
    var(--grad-main);
  background-origin: border-box;
  background-clip: padding-box, border-box;
  box-shadow: 0 20px 50px rgba(0,0,0,.35);
}
.stats-panel__item{ position:relative; text-align:center; padding:0 28px; }
.stats-panel__item + .stats-panel__item::before{
  content:""; position:absolute; left:0; top:6px; bottom:6px; width:1px;
  background: var(--line-2);
}
.stats-panel__value{
  display:block;
  font-family: var(--font-num);
  font-size:54px; font-weight:700; line-height:1;
  background: var(--grad-main);
  -webkit-background-clip:text; background-clip:text;
  -webkit-text-fill-color:transparent; color:transparent;
  font-variant-numeric: tabular-nums;
}
.stats-panel__value .unit{
  -webkit-text-fill-color: var(--cyan);
  color: var(--cyan);
  font-size:26px; margin-left:2px;
}
.stats-panel__unit{ display:block; margin-top:12px; font-size:13px; color: var(--text-4); }

.quotes{ display:flex; gap:24px; }
.quote{
  flex:1 1 0; min-width:0;
  background: var(--bg-card);
  border:1px solid var(--line-1);
  border-radius: var(--radius-card);
  padding:30px;
  display:flex; flex-direction:column;
  transition: transform .3s ease, border-color .3s ease, box-shadow .3s ease;
}
.quote:hover{ transform:translateY(-4px); border-color:rgba(0,230,255,.24); box-shadow:0 24px 50px rgba(0,0,0,.45); }
.quote__who{ display:flex; align-items:center; gap:12px; margin-bottom:18px; }
.avatar{
  width:44px; height:44px; border-radius:50%;
  display:inline-flex; align-items:center; justify-content:center;
  background: var(--grad-main);
  color:#05101F; font-size:17px; font-weight:700;
  flex:0 0 auto;
}
.quote__meta{ display:flex; flex-direction:column; }
.quote__name{ font-size:15px; font-weight:600; color: var(--text-2); }
.quote__role{ font-size:12px; color: var(--text-4); margin-top:3px; }
.quote__text{
  position:relative;
  font-size:14px; line-height:1.9; color: var(--text-3);
  padding-left:22px;
}
.quote__text::before{
  content:"“";
  position:absolute; left:0; top:-6px;
  font-size:34px; line-height:1; color: var(--cyan); opacity:.55;
  font-family: Georgia, "Songti SC", serif;
}
.quote__metric{
  margin-top:auto; padding-top:22px;
  font-family: var(--font-num);
  font-size:26px; font-weight:700; color: var(--cyan);
  display:flex; align-items:baseline; gap:8px;
  font-variant-numeric: tabular-nums;
}
.quote__metric span{ font-family: var(--font-sans); font-size:12px; font-weight:400; color: var(--text-4); }
.quote__metric--amber{ color: var(--amber); }
.quote__metric--violet{ color: var(--violet); }

/* ========== 04-6. FAQ ========== */
.faq{ display:flex; flex-direction:column; gap:14px; }
.faq__item{
  background: var(--bg-card);
  border:1px solid var(--line-1);
  border-radius:18px;
  padding:0 28px;
  transition: background-color .3s ease, border-color .3s ease;
}
.faq__item.is-open{
  background: var(--bg-card-hi);
  border-color: rgba(0,230,255,0.28);
}
.faq__head{ font-size:inherit; font-weight:inherit; }
.faq__btn{
  width:100%;
  display:flex; align-items:center; justify-content:space-between; gap:20px;
  padding:26px 0;
  text-align:left;
}
.faq__q{ font-size:17px; font-weight:500; color: var(--text-2); line-height:1.6; }
.faq__icon{
  flex:0 0 auto;
  width:30px; height:30px; border-radius:50%;
  display:inline-flex; align-items:center; justify-content:center;
  transition: background .3s ease, border-color .3s ease, box-shadow .3s ease;
}
.faq__item.is-open .faq__icon{
  background: var(--grad-main);
  color:#FFFFFF;
  box-shadow: var(--glow-cyan-sm);
}
.faq__item:not(.is-open) .faq__icon{
  background: rgba(255,255,255,0.05);
  border:1px solid rgba(0,230,255,0.35);
  color: var(--cyan);
}
.faq__minus, .faq__plus{ display:none; }
.faq__item.is-open .faq__minus{ display:block; }
.faq__item:not(.is-open) .faq__plus{ display:block; }

/* 折叠态同样只在 .js 下生效：无 JS 时 6 条答案全部展开可读。
   .js 下默认展开项由 CSS 直接放开，不依赖 main.js 设置高度。 */
.js .faq__panel{
  max-height:0;
  overflow:hidden;
  transition: max-height .38s cubic-bezier(.4,0,.2,1);
}
.js .faq__item.is-open .faq__panel{ max-height:none; }
.faq__answer{
  padding:0 60px 26px 0;
  font-size:15px; line-height:1.8; color: var(--text-3);
}

/* ========== 04-7. CTA ========== */
.cta{
  position:relative;
  padding:100px 120px;
  background: linear-gradient(135deg, var(--bg-cta-a), var(--bg-cta-b));
  overflow:hidden;
  isolation:isolate;
}
.cta__glow{ position:absolute; z-index:-1; pointer-events:none; }
.cta__glow--tl{ top:-160px; left:-120px; width:560px; height:560px; background: radial-gradient(circle, rgba(0,230,255,.22) 0%, rgba(0,230,255,0) 68%); }
.cta__glow--br{ right:-140px; bottom:-180px; width:560px; height:560px; background: radial-gradient(circle, rgba(125,92,255,.22) 0%, rgba(125,92,255,0) 68%); }

.cta__card{
  max-width:1200px; margin:0 auto;
  background: rgba(13,23,48,0.72);
  border:1px solid rgba(255,255,255,0.10);
  border-radius:28px;
  box-shadow: var(--shadow-card);
  padding:72px 64px;
  text-align:center;
  display:flex; flex-direction:column; align-items:center;
}
.cta__title{ margin-top:22px; font-size:44px; line-height:1.25; font-weight:700; color:#fff; letter-spacing:-.5px; }
.cta__sub{ margin-top:20px; max-width:820px; font-size:17px; line-height:1.75; color: var(--text-3); }
.cta__actions{ display:flex; gap:14px; margin-top:36px; flex-wrap:wrap; justify-content:center; }
.cta__note{ margin-top:24px; font-size:14px; color: var(--text-4); }

/* ========== 04-8. Footer ========== */
.footer{
  background: var(--bg-footer);
  padding:76px 0 36px;
}
.footer__main{ display:flex; justify-content:space-between; gap:32px; }
.footer__brand{ width:340px; flex:0 0 auto; }
.footer__brand-row{ display:flex; align-items:center; gap:12px; }
.footer__logo{
  width:34px; height:34px; border-radius:9px; flex:0 0 auto;
  display:inline-flex; align-items:center; justify-content:center;
  background: var(--grad-main);
  color:#05101F; font-size:15px; font-weight:700;
}
.footer__brand-name{ font-size:17px; font-weight:600; color: var(--text-2); }
.footer__desc{ margin-top:18px; font-size:14px; line-height:1.8; color: var(--text-4); max-width:320px; }

.social{ display:flex; gap:10px; margin-top:22px; }
.social__item{
  width:34px; height:34px; border-radius:8px;
  display:inline-flex; align-items:center; justify-content:center;
  background: rgba(255,255,255,0.05);
  border:1px solid var(--line-1);
  font-size:13px; color: var(--text-4);
  transition: color .25s ease, border-color .25s ease, background-color .25s ease;
}
.social__item:hover{ color: var(--cyan); border-color: rgba(0,230,255,.35); background: rgba(0,230,255,.06); }

.footer__nav{ flex:0 0 auto; }
.footer__col-title{ font-size:15px; font-weight:600; color: var(--text-2); margin-bottom:18px; }
.footer__nav ul li + li{ margin-top:8px; }
.footer__nav a{
  font-size:14px; line-height:26px; color: var(--text-4);
  transition: color .25s ease;
}
.footer__nav a:hover{ color: var(--cyan); }

.footer__line{
  height:1px; margin:56px 0 28px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.14), transparent);
}
.footer__bottom{ text-align:center; }
.footer__copy{ font-size:13px; color: var(--text-5); }
.footer__icp{ margin-top:10px; }
.icp{
  display:inline-flex; align-items:center; gap:5px;
  font-size:13px; font-weight:500;
  color:#7FE9FF;
  border-bottom:1px solid rgba(127,233,255,0.42);
  padding-bottom:2px;
  transition: color .25s ease, border-color .25s ease;
}
.icp:hover{ color:#B6F5FF; border-bottom-color: rgba(180,245,255,.85); }

/* ========== 05. 响应式 ========== */

/* ≤ 1200px：容器内边距收窄到 40px */
@media (max-width:1200px){
  .site-header__inner{ padding:18px 40px; }
  .cta{ padding:90px 40px; }
  .hero__title-line{ font-size:56px; }
  /* 1200~900 保持 2×2：容器放不下 4 张时避免出现 3+1 孤儿行 */
  .steps{ flex-wrap:wrap; justify-content:center; }
  .step{ flex:1 1 calc(50% - 8px); max-width:none; }
  .stats-panel{ padding:44px 24px; }
  .stats-panel__value{ font-size:46px; }
  .stats-panel__item{ padding:0 16px; }
}

/* ≤ 900px：Bento 单列 / 流程 2×2 / 证言单列 / 页脚两列 / 标题降级 */
@media (max-width:900px){
  :root{ --section-y:76px; }
  html{ scroll-padding-top: calc(var(--header-h) + 4px); }

  /* 移动端导航 */
  .menu-toggle{ display:inline-flex; }
  .nav{
    position:absolute; top:100%; left:0; right:0;
    flex-direction:column; align-items:stretch; gap:8px;
    padding:18px 24px 26px;
    background: rgba(3,6,14,0.98);
    -webkit-backdrop-filter: blur(18px);
    backdrop-filter: blur(18px);
    border-bottom:1px solid var(--line-1);
    box-shadow:0 18px 40px rgba(0,0,0,.5);
    transform-origin: top center;
    transition: opacity .26s ease, transform .26s ease, visibility .26s;
    visibility:hidden; opacity:0; transform:translateY(-10px);
  }
  .nav.is-open{ visibility:visible; opacity:1; transform:none; }
  .nav__list{ flex-direction:column; align-items:stretch; gap:2px; }
  .nav__link{ display:block; padding:12px 4px; font-size:15px; border-bottom:1px solid var(--line-1); }
  .nav__link::after{ display:none; }
  .nav__actions{ margin-top:16px; }
  .nav__actions .btn{ flex:1; height:46px; }

  /* Hero */
  .hero{ padding:64px 0 84px; }
  .hero__title-line{ font-size:40px; }
  .hero__sub{ font-size:16px; }
  .hero__stats{ gap:28px; margin-top:44px; }
  .hero__stat + .hero__stat::before{ left:-14px; }
  .hero__stat-num{ font-size:30px; }
  .hero__stat-num .unit{ font-size:18px; }
  .cockpit{ margin-top:48px; }
  .cockpit__kpis{ grid-template-columns:repeat(2,1fr); }
  .cockpit__body{ flex-direction:column; }
  .panel--chart, .panel--ai{ flex:1 1 auto; }
  .chart{ height:120px; }

  /* Bento 单列 */
  .bento{ grid-template-columns:1fr; }
  .b-card--a, .bento__col{ grid-column:1; }
  .b-card--a{ grid-row:auto; min-height:0; }
  .bento__col{ grid-row:auto; }

  /* 流程 2×2 */
  .step{ flex:1 1 calc(50% - 8px); max-width:none; }

  /* 指标面板 2×2 */
  .stats-panel{ flex-wrap:wrap; justify-content:center; gap:28px 0; min-height:0; }
  .stats-panel__item{ flex:0 0 50%; padding:0 12px; }
  .stats-panel__item:nth-child(3)::before{ display:none; }

  /* 证言单列 */
  .quotes{ flex-direction:column; }
  .quote__metric{ margin-top:24px; }

  /* CTA */
  .cta__card{ padding:48px 28px; border-radius:22px; }
  .cta__title{ font-size:32px; }

  /* 页脚两列 */
  .footer__main{ flex-wrap:wrap; gap:36px 24px; }
  .footer__brand{ width:100%; flex:1 1 100%; }
  .footer__nav{ flex:1 1 30%; min-width:140px; }
  .sub-title{ margin:56px 0 28px; }
}

/* ≤ 600px：进一步降级 */
@media (max-width:600px){
  .site-header__inner{ padding:14px 20px; }
  .container{ padding:0 20px; }
  .cta{ padding:64px 20px; }

  .hero__title-line{ font-size:32px; }
  .hero__actions .btn{ width:100%; }
  .hero__actions{ width:100%; flex-direction:column; gap:12px; }

  /* 数据条纵向堆叠 */
  .hero__stats{ flex-direction:column; gap:22px; }
  .hero__stat + .hero__stat::before{ display:none; }

  .step{ flex:1 1 100%; }
  .stats-panel__item{ flex:0 0 100%; }
  .stats-panel__item + .stats-panel__item::before{ display:none; }
  .stats-panel__value{ font-size:42px; }

  .section-title{ font-size:30px; }
  .section-title--md{ font-size:28px; }
  .sub-title{ font-size:20px; }
  .cta__title{ font-size:28px; }
  .cta__sub{ font-size:15px; }
  .cta__actions{ width:100%; flex-direction:column; gap:12px; }
  .cta__actions .btn{ width:100%; }

  .cockpit__kpis{ grid-template-columns:1fr; }
  .cockpit__url{ margin-left:8px; font-size:10px; }
  .faq__item{ padding:0 18px; }
  .faq__q{ font-size:15px; }
  .faq__answer{ padding-right:0; font-size:14px; }
  .faq__btn{ gap:12px; padding:20px 0; }

  .footer__nav{ flex:1 1 100%; }
  .social{ margin-top:18px; }
}

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