/* ═══════════════════════════════════════════════
   JX Mind — 重庆佳星哲科技集团旗下品牌
   设计系统：与母品牌cqjxz.cn / jxmaker.cn / jxdrone.cn一脉相承
   主色：Apple Blue #007aff
   ═══════════════════════════════════════════════ */

:root {
  color-scheme: light;

  /* === 品牌色（JX 生态五站统一：母站 cqjxz.com 同值）=== */
  --blue: #007aff;
  --blue-strong: #005ecb;
  --blue-soft: #e8f2ff;
  --blue-rgb: 0, 122, 255;
  --board: #0b1220;      /* 生态深蓝（暗色面板：CTA / 图角标签），与 jxrobotics/jxmaker 同族 */
  --lime: #d8f36a;       /* 母站强调色，用于 eyebrow 点缀线 / 微观高亮 */

  /* === 中性色（浅色主题，跟随母站）=== */
  --bg: #f5f5f7;
  --surface: #ffffff;
  --surface-soft: #eef1f4;
  --surface-tint: rgba(255,255,255,0.82);
  --card-bg: rgba(255,255,255,0.86);
  --ink: #1d1d1f;
  --text: #424245;
  --muted: #6e6e73;
  --muted-2: #73737a;
  --line: #dfe3e8;
  --line-strong: #c9d0d8;
  --line-soft: #eef1f4;
  --hero-glow-primary: rgba(0,122,255,0.10);
  --hero-glow-two: rgba(88,86,214,0.08);

  /* === 字体 === */
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "PingFang SC", "Microsoft YaHei", "Segoe UI", system-ui, Arial, sans-serif;

  /* === 圆角（对齐母站 10/18/28）=== */
  --radius: 10px;        /* 卡片 / 输入框 / 胶囊外容器 */
  --radius-lg: 18px;     /* 大卡片 / CTA */
  --radius-xl: 28px;     /* 超大面板 / hero 大图 */

  /* === 阴影（母站色相：蓝灰 #101828，非纯黑）=== */
  --shadow-sm: 0 1px 3px rgba(16,24,40,0.05), 0 6px 16px rgba(16,24,40,0.07);
  --shadow-md: 0 4px 14px rgba(16,24,40,0.08), 0 16px 40px rgba(16,24,40,0.12);
  --shadow-lg: 0 8px 24px rgba(16,24,40,0.10), 0 28px 64px rgba(16,24,40,0.16);

  /* === 微交互缓动（Apple 标准曲线）=== */
  --ease: cubic-bezier(0.32, 0.72, 0, 1);        /* 通用入场 / 悬停 */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);     /* 滚动渐显 / 抬升 */
  --dur: 0.4s;

  /* === 阅读宽度（Apple 窄栏原则，长文更易读）=== */
  --measure: 680px;

  /* === 布局 === */
  --content: min(1180px, calc(100% - 48px));

  /* === 尺寸（导航高对齐生态 56-64 区间）=== */
  --nav-h: 64px;
  --section-py: 96px;

  /* === 布局语义 token（v3.5：色带全出血 / tag 主题反转）=== */
  --content-max: 1180px;   /* 与 --content 上限一致，供全出血色带引用 */
  --content-wide-max: 1340px;  /* header/footer 内容上限；1388 设计宽 − 2×24 gutter */
  --gutter: 24px;          /* 内容区两侧安全内边距（100% - 48px 的一半） */
  --tag-bg: rgba(0,0,0,0.05);
  --tag-border: rgba(0,0,0,0.10);
  --tag-fg: #475569;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { background: var(--bg); color: var(--ink); -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; line-height: 1.6; }
body { min-width: 0; overflow-x: hidden; text-rendering: optimizeLegibility; }
body.is-nav-open { overflow: hidden; }
a { color: inherit; }
button { font: inherit; }
img { max-width: 100%; height: auto; display: block; }
h1, h2, h3, p { overflow-wrap: anywhere; }

/* ── Focus-visible (a11y)：键盘焦点环，仅 :focus-visible 触发，避免鼠标点击也出环 ── */
a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
  border-radius: 4px;
}
/* 表单控件沿用既有 box-shadow 焦点环，去掉 outline 以免双环 */
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: none;
  border-color: var(--blue);
  box-shadow: 0 0 0 4px rgba(var(--blue-rgb), 0.12);
}

/* ── v4.4 (a11y)：蓝底元素上的焦点环 ──
   全局 :focus-visible 用 --blue outline，在蓝底白字控件上不可见；
   这些元素改用白色内环 + 蓝色外圈双环，键盘焦点在任意主题下都清晰。 */
.filter-chip.is-active:focus-visible,
.primary-button:focus-visible,
.intent-custom:focus-visible,
.combo-result:focus-visible,
.mobile-consult-bar a:last-child:focus-visible,
.process-step:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 2px;
  box-shadow: 0 0 0 4px rgba(var(--blue-rgb), 0.35);
}

/* ── Skip Link ── */
.skip-link {
  position: fixed; top: -100px; left: 12px; z-index: 300;
  padding: 10px 16px; border-radius: 8px;
  /* v3.6 (designer-2 #12)：不能用 --ink——深色主题下 --ink 反转为浅色，
     配 color:#fff 就是白底白字，跳转链接对键盘用户彻底不可读。
     --blue 在双主题下都是深蓝，与 #fff 恒定高对比。 */
  background: var(--blue); color: #fff; text-decoration: none;
  transition: top 0.2s;
}
.skip-link:focus { top: 12px; }

/* ═══════════════════════════════════════════════
   HEADER
   ═══════════════════════════════════════════════ */
.site-header {
  position: fixed; top: 0; right: 0; left: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  gap: 22px;
  min-height: 70px;
  padding: 12px max(var(--gutter), calc((100% - var(--content-wide-max)) / 2));
  background: var(--surface-tint);
  backdrop-filter: saturate(180%) blur(22px);
  -webkit-backdrop-filter: saturate(180%) blur(22px);
  border-bottom: 1px solid var(--line);
  transition: background-color 0.2s, box-shadow 0.2s;
}
.site-header.is-scrolled {
  background: var(--surface-tint);
  box-shadow: 0 1px 0 var(--line);
}

.brand { display: inline-flex; align-items: center; flex: 0 0 auto; gap: 11px; text-decoration: none; }
.brand img { width: 42px; height: 42px; border-radius: var(--radius); border: 1px solid var(--line); object-fit: cover; background: var(--surface); }
.brand strong, .brand small { display: block; }
.brand strong { font-size: 16px; font-weight: 700; line-height: 1.15; }
.brand small { margin-top: 2px; color: var(--muted); font-size: 12px; font-weight: 650; line-height: 1.15; }

.menu-toggle { display: none; width: 44px; height: 44px; padding: 0; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface-tint); cursor: pointer; position: relative; }
.menu-toggle span { display: block; width: 18px; height: 1.5px; margin: 5px auto; background: var(--ink); transition: 0.2s; }
/* script.js 切换 .is-open 后必须有形变，否则汉堡永远三条杠、菜单开合无状态反馈 */
.menu-toggle.is-open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.menu-toggle.is-open span:nth-child(2) { opacity: 0; }
.menu-toggle.is-open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }
@media (prefers-reduced-motion: reduce) {
  .menu-toggle span { transition: none; }
}

.site-nav { display: flex; align-items: center; justify-content: center; flex: 1; gap: 18px; min-width: 0; }
.site-nav a {
  position: relative;
  padding: 8px 0;
  font-size: 14px; font-weight: 600; color: var(--text);
  text-decoration: none; white-space: nowrap;
  transition: color 0.15s, background 0.15s;
}
.site-nav a::after {
  content: ""; position: absolute; bottom: 2px; left: 0; right: 0;
  height: 2px; border-radius: 999px; background: var(--blue);
  transform: scaleX(0); transition: transform 0.2s;
}
.site-nav a:hover { color: var(--blue-strong); }
.site-nav a:hover::after,
.site-nav a[aria-current="page"]::after { transform: scaleX(1); }
.site-nav a[aria-current="page"] { color: var(--blue-strong); }
.site-nav .lang-link { color: var(--blue-strong); }
.site-nav .lang-link::after { display: none; }

.header-actions { display: flex; align-items: center; justify-content: flex-end; gap: 14px; flex: 0 0 auto; }

/* ═══════════════════════════════════════════════
   BUTTONS
   ═══════════════════════════════════════════════ */
.primary-button, .secondary-button {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 44px; padding: 0 22px; border-radius: 999px;
  font-size: 15px; font-weight: 700; text-decoration: none;
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
  border: none; cursor: pointer; white-space: nowrap;
}
.primary-button:active, .secondary-button:active { transform: translateY(0) scale(0.98); }
.primary-button[aria-disabled="true"], .secondary-button[aria-disabled="true"],
.primary-button:disabled, .secondary-button:disabled { opacity: 0.48; cursor: not-allowed; transform: none; box-shadow: none; }
.primary-button {
  background: var(--blue);
  color: #fff;
  box-shadow: 0 10px 24px rgba(var(--blue-rgb),0.2);
}
.primary-button:hover { background: var(--blue-strong); transform: translateY(-1px); box-shadow: 0 14px 32px rgba(var(--blue-rgb),0.28); }
.secondary-button {
  background: var(--surface);
  color: var(--ink);
  border: 1px solid var(--line-strong);
}
.secondary-button:hover { transform: translateY(-1px); border-color: rgba(var(--blue-rgb),0.42); color: var(--blue-strong); }
.compact-button { min-height: 38px; padding: 0 16px; font-size: 13px; }

/* ═══════════════════════════════════════════════
   HERO（v5.3 视觉统一：浅色两列，对齐母站 hero--home）
   ═══════════════════════════════════════════════ */
.hero {
  position: relative;
  display: flex; align-items: center;
  padding: 116px 0 88px;
  background: var(--bg); color: var(--ink);
  overflow: hidden;
}
.hero-overlay {
  position: absolute; inset: 0; z-index: 1; pointer-events: none;
  background:
    radial-gradient(900px 480px at 85% 8%, var(--hero-glow-primary) 0%, transparent 60%),
    radial-gradient(760px 440px at 6% 96%, var(--hero-glow-two) 0%, transparent 55%);
}
.hero-grid {
  position: relative; z-index: 2;
  width: var(--content); margin: 0 auto;
  display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 56px; align-items: center;
}
.hero-copy { max-width: 620px; }

.hero-parent {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 13px; font-weight: 700;
  color: var(--blue-strong); letter-spacing: 0.02em;
  margin-bottom: 16px;
}
.hero-parent::before {
  content: ""; width: 20px; height: 3px; border-radius: 999px;
  background: var(--lime);
}
.hero h1 {
  font-size: clamp(40px, 5vw, 60px);
  line-height: 1.06; letter-spacing: -0.025em;
  font-weight: 800;
  margin-bottom: 20px;
}
.hero-lead {
  max-width: 560px; font-size: clamp(16px, 2vw, 19px); line-height: 1.65;
  color: var(--text); margin-bottom: 32px;
}
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.hero .tag-list { margin-top: 36px; }

.hero-art { position: relative; }
.hero-art img {
  width: 100%; aspect-ratio: 16 / 10; object-fit: cover;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  border: 1px solid rgba(255,255,255,0.7);
}
.hero-art-label {
  position: absolute; left: 20px; bottom: 20px;
  display: flex; flex-direction: column; gap: 4px;
  padding: 14px 18px; border-radius: var(--radius);
  background: rgba(11,18,32,0.84);
  -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px);
  color: #fff; font-size: 14px; line-height: 1.5;
}
.hero-art-label strong { font-size: 16px; font-weight: 800; }
.hero-art-label span {
  font-size: 12px; color: var(--lime);
  letter-spacing: 0.06em; text-transform: uppercase; font-weight: 600;
}

.tag-list { display: flex; gap: 8px; flex-wrap: wrap; }
.tag-list span {
  height: 30px; padding: 0 12px; border-radius: 999px;
  background: var(--tag-bg);
  border: 1px solid var(--tag-border);
  font-size: 12px; font-weight: 600; color: var(--tag-fg);
  display: inline-flex; align-items: center;
}

/* ═══════════════════════════════════════════════
   SECTIONS
   ═══════════════════════════════════════════════ */
/* v3.6 (designer #3)：section 由「定宽居中」改为「满宽 + 内边距收口」。
   padding-inline 的 100% 参照 body 内容宽（已扣除滚动条），与旧的
   --content: min(1180px, 100% - 48px) 数学等价，但不含 vw ——
   因此色带可直接在 .section 上铺背景，无需 ::before + ±50vw，
   彻底规避「100vw 含滚动条宽 → 横向溢出」和 overflow-x:hidden 打断 sticky 的双重隐患。
   注意：任何断点内重声明必须用 padding-block，padding 简写会清零 gutter。 */
.section {
  width: 100%;
  padding-block: var(--section-py);
  padding-inline: max(var(--gutter), calc((100% - var(--content-max)) / 2));
  scroll-margin-top: var(--nav-h);
}

.section-heading { max-width: 720px; margin-bottom: 48px; }
.section-heading h2 {
  font-size: clamp(36px, 4.5vw, 52px);
  font-weight: 760; letter-spacing: -0.02em; line-height: 1.12;
  color: var(--ink);
}
.section-heading p {
  margin-top: 12px; font-size: 17px; color: var(--muted); line-height: 1.7;
}
.eyebrow {
  display: inline-block; font-size: 13px; font-weight: 700;
  letter-spacing: 0.04em; text-transform: uppercase;
  color: var(--blue-strong); margin-bottom: 8px;
}

/* ── Trust Band ── */
/* v3.6 (designer-2 #54)：与 .section-band 统一色带外观——同底色、上下双描边、同样全出血。
   padding-block（非简写）以保留 .section 的 padding-inline gutter。
   v3.7 (designer-2 Q2)：选择器必须写成 .section.trust-band（0,2,0）——单独的 .trust-band
   只有 (0,1,0)，会被 @720 断点里后声明的 .section{padding-block:66px}（同特异性、位置更后）
   压过，移动端 48px 静默失效。凡是「.section 上的修饰类」都要带 .section 前缀。 */
.section.trust-band {
  padding-block: 48px; text-align: center;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--surface-soft);
}
.trust-stats { display: flex; justify-content: center; gap: 48px; flex-wrap: wrap; }
.trust-stat { min-width: 100px; }
.trust-num { font-size: 32px; font-weight: 800; letter-spacing: -0.02em; color: var(--blue); margin-bottom: 4px; }
.trust-label { font-size: 13px; color: var(--muted); }

/* ── Logo Wall ── */
.logo-wall {
  width: var(--content); margin: 0 auto;
  padding: 40px 0; text-align: center;
}
.logo-wall-label {
  font-size: 13px; font-weight: 700; color: var(--muted-2);
  letter-spacing: 0.04em; margin-bottom: 20px;
}
.logo-wall-grid {
  display: flex; flex-wrap: wrap; justify-content: center; gap: 12px;
}
.logo-item {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 12px 22px; border-radius: var(--radius);
  background: var(--surface); border: 1px solid var(--line);
  font-size: 15px; font-weight: 700; color: var(--muted);
  letter-spacing: -0.01em; white-space: nowrap;
  transition: 0.2s;
}
.logo-item:hover { color: var(--blue-strong); border-color: rgba(var(--blue-rgb),0.3); transform: translateY(-1px); }

@media (max-width: 720px) {
  .logo-item { padding: 10px 16px; font-size: 13px; }
}

/* ── Cards ── */
/* v3.7 (#48)：卡片基类去重——9 类卡片共用的 border + radius 抽到分组选择器，
   避免逐卡重复声明；背景 / 内边距 / 动效因各异保留在各自规则中。 */
.feature-card, .detail-card, .scenario-card, .process-card,
.bundle-card, .token-pack-card, .overview-card, .readiness-card,
.guarantee-grid article {
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.capability-grid {
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px;
}
.feature-card {
  display: block; padding: 36px 28px;
  background: var(--card-bg); text-decoration: none;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.3s, border-color 0.3s;
}
.feature-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: rgba(var(--blue-rgb),0.24);
}
.card-index {
  display: inline-block; height: 30px; padding: 0 14px;
  border-radius: 999px; font-size: 12px; font-weight: 700;
  line-height: 30px;
  background: var(--blue-soft);
  color: var(--blue-strong); margin-bottom: 20px;
}
.card-icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 48px; height: 48px; border-radius: 12px;
  background: var(--blue-soft); color: var(--blue-strong);
  margin-bottom: 18px;
}
.feature-card .card-icon { display: inline-flex; }
.feature-card h3 { font-size: 22px; font-weight: 700; letter-spacing: -0.01em; line-height: 1.2; margin-bottom: 10px; }
.card-sub { display: block; font-size: 14px; font-weight: 600; color: var(--blue-strong); margin-top: 4px; }
.feature-card p { color: var(--muted); font-size: 14px; line-height: 1.7; }
.card-meta { display: block; margin-top: 16px; font-size: 13px; font-weight: 700; color: var(--blue-strong); }

/* ── Decision Hint ── */
.decision-hint {
  display: flex; align-items: center; gap: 16px; flex-wrap: wrap;
  margin-top: 28px; padding: 20px 24px;
  background: var(--blue-soft); border: 1px solid rgba(var(--blue-rgb),0.18);
  border-radius: var(--radius);
}
.decision-icon {
  display: inline-flex; align-items: center; justify-content: center;
  flex: 0 0 auto; width: 36px; height: 36px; border-radius: 50%;
  background: var(--blue); color: #fff; font-weight: 800; font-size: 18px;
}
.decision-hint p { flex: 1 1 320px; color: var(--text); font-size: 14px; line-height: 1.7; }
.decision-hint p strong { color: var(--ink); }
.decision-hint p em { color: var(--blue-strong); font-style: normal; font-weight: 600; }
.decision-hint a { flex: 0 0 auto; }

@media (max-width: 720px) {
  .decision-hint { padding: 18px 16px; }
  .decision-hint a { width: 100%; }
}

.three-col-grid {
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px;
}
.detail-card {
  padding: 32px 28px;
  background: var(--card-bg); transition: transform 0.25s, box-shadow 0.25s;
}
.detail-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.detail-card h3 { font-size: 18px; font-weight: 700; letter-spacing: -0.01em; margin-bottom: 8px; }
.detail-card p { color: var(--muted); font-size: 14px; line-height: 1.7; }
.detail-card ul { margin-top: 14px; padding-left: 18px; color: var(--muted); font-size: 13px; line-height: 1.8; }
.detail-card li::marker { color: var(--blue); }

.card-label {
  display: inline-block; height: 24px; padding: 0 10px; border-radius: 999px;
  background: var(--blue-soft);
  font-size: 11px; font-weight: 700; line-height: 24px;
  color: var(--blue-strong);
  text-transform: uppercase; letter-spacing: 0.04em; margin-bottom: 16px;
}

.two-col-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }

.scenario-grid {
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px;
}
.scenario-card { padding: 28px; background: var(--card-bg); }
.scenario-card h3 { font-size: 18px; font-weight: 700; line-height: 1.3; margin-bottom: 10px; }
.scenario-card p { color: var(--muted); font-size: 14px; line-height: 1.7; }
.scenario-result { margin-top: 14px; font-size: 13px; font-weight: 700; color: var(--blue-strong); letter-spacing: 0.02em; }

.process-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.process-grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.process-card { padding: 28px; background: var(--surface-soft); }
.process-step {
  display: inline-block; height: 26px; padding: 0 12px; border-radius: 999px;
  background: var(--blue);
  color: #fff; font-size: 12px; font-weight: 700; line-height: 26px;
  margin-bottom: 16px;
}
.process-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.process-card p { color: var(--muted); font-size: 14px; line-height: 1.7; }

/* ── Product Table ── */
.product-table {
  width: 100%; max-width: 960px; margin: 0 auto;
  border-collapse: collapse; border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--line); background: var(--surface);
}
.product-table table { width: 100%; }
.product-table th, .product-table td { padding: 14px 20px; text-align: left; border-bottom: 1px solid var(--line); font-size: 15px; }
.product-table thead th { background: var(--surface-soft); font-weight: 700; font-size: 15px; }
.product-table tbody tr:last-child td { border-bottom: none; }
.product-table tbody tr:hover { background: var(--surface-soft); }

/* ── Comparison Table ── */
.comparison-table {
  width: 100%; max-width: 960px; margin: 0 auto;
  border-collapse: collapse; border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--line); background: var(--surface);
}
.comparison-table th, .comparison-table td { padding: 14px 20px; text-align: center; border-bottom: 1px solid var(--line); font-size: 15px; }
.comparison-table thead th { background: var(--surface-soft); font-weight: 700; font-size: 16px; }
.comparison-table tbody th { text-align: left; font-weight: 600; }
.comparison-table tbody tr:last-child th, .comparison-table tbody tr:last-child td { border-bottom: none; }

/* ── Comparison Table 横向滚动容器（.table-scroll 包裹由 team-lead 在 pricing 页加）── */
.table-scroll { width: 100%; overflow-x: auto; -webkit-overflow-scrolling: touch; }
.table-scroll .comparison-table { min-width: 640px; }

/* ── Bundle Cards ── */
.bundle-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; align-items: stretch; }
.bundle-card {
  display: flex; flex-direction: column; padding: 32px 28px;
  background: var(--surface); transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
}
.bundle-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: rgba(var(--blue-rgb),0.2); }
.bundle-badge {
  display: inline-flex; align-self: flex-start; padding: 4px 12px;
  background: var(--surface-soft); border-radius: 999px;
  font-size: 12px; font-weight: 700; color: var(--text);
  margin-bottom: 16px;
}
.bundle-featured {
  border-color: rgba(var(--blue-rgb),0.3);
  box-shadow: 0 4px 24px rgba(var(--blue-rgb),0.08);
}
.bundle-card h3 { font-size: 24px; font-weight: 700; letter-spacing: -0.01em; }
.bundle-price { font-size: 14px; color: var(--muted); font-weight: 600; margin: 6px 0 16px; }
.bundle-card > p { font-size: 15px; color: var(--text); line-height: 1.7; margin-bottom: 20px; }
.bundle-card ul { list-style: none; padding: 0; margin: 0 0 24px; font-size: 14px; color: var(--muted); }
.bundle-card li { position: relative; padding-left: 20px; margin-bottom: 6px; }
.bundle-card li::before { content: "✓"; position: absolute; left: 0; color: var(--blue); font-weight: 700; }
.bundle-card > a { margin-top: auto; text-align: center; width: 100%; }

/* ── Page Hero ── */
.page-hero {
  padding: 160px 0 80px;
  background: var(--surface-soft); border-bottom: 1px solid var(--line);
}
.page-hero-inner { width: var(--content); margin: 0 auto; }
.breadcrumb {
  display: flex; gap: 8px; margin-bottom: 20px;
  color: var(--muted); font-size: 13px; font-weight: 600;
}
.breadcrumb a { color: var(--blue); text-decoration: none; }
.page-hero h1 { max-width: 800px; font-size: clamp(42px, 5.5vw, 62px); font-weight: 800; letter-spacing: -0.02em; line-height: 1.04; }
.page-hero p { max-width: 640px; margin-top: 20px; font-size: 18px; color: var(--text); line-height: 1.7; }

/* ── Product Hero Media（产品视觉图 / glyph） ── */
.product-hero-media {
  margin-top: 36px;
  display: flex;
  justify-content: center;
}
.product-hero-media img {
  max-width: 100%;
  max-height: 280px;
  width: auto;
  height: auto;
  border-radius: 14px;
  box-shadow: var(--shadow-lg);
}
@media (min-width: 880px) {
  .product-hero {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: 48px;
    align-items: start;
  }
  .product-hero-media {
    margin-top: 0;
    position: sticky;
    top: 120px;
  }
}

/* ── Selection Note / Token Pack ── */
.selection-note {
  max-width: 960px; margin: 0 auto 28px; padding: 16px 20px;
  border: 1px solid var(--line); border-left: 3px solid var(--blue);
  border-radius: var(--radius); background: var(--surface-soft);
  font-size: 14px; color: var(--text); line-height: 1.7;
}
.selection-note strong { color: var(--blue-strong); }
.token-pack-grid {
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px;
  max-width: 960px; margin: 0 auto 16px; align-items: stretch;
}
.token-pack-card {
  display: flex; flex-direction: column; padding: 28px 24px;
  background: var(--surface); transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
}
.token-pack-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: rgba(var(--blue-rgb),0.2); }
.token-pack-featured { border-color: rgba(var(--blue-rgb),0.3); box-shadow: 0 4px 24px rgba(var(--blue-rgb),0.08); }
.token-pack-card h3 { font-size: 26px; font-weight: 800; letter-spacing: -0.01em; margin: 4px 0 2px; }
.token-pack-desc { font-size: 13px; color: var(--muted); font-weight: 600; margin-bottom: 16px; }
.token-pack-card ul { list-style: none; padding: 0; margin: 0 0 20px; font-size: 14px; color: var(--muted); }
.token-pack-card li { position: relative; padding-left: 20px; margin-bottom: 6px; }
.token-pack-card li::before { content: "✓"; position: absolute; left: 0; color: var(--blue); font-weight: 700; }
.token-pack-card > a { margin-top: auto; text-align: center; width: 100%; }
.token-pack-footnote {
  max-width: 960px; margin: 0 auto; text-align: center;
  font-size: 13px; color: var(--muted);
}
.token-pack-footnote a { color: var(--blue); font-weight: 600; }

/* ── AI Readiness ── */
.readiness-band { position: relative; }
.readiness-grid {
  display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px;
}
.readiness-card {
  display: flex; flex-direction: column; padding: 24px 22px;
  background: var(--card-bg); text-decoration: none; color: inherit;
  transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
}
.readiness-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: rgba(var(--blue-rgb),0.25); }
.readiness-active { border-color: rgba(var(--blue-rgb),0.35); box-shadow: 0 4px 20px rgba(var(--blue-rgb),0.08); }
.readiness-level {
  align-self: flex-start; display: inline-block; padding: 2px 10px;
  border-radius: 999px; background: var(--blue-soft); color: var(--blue-strong);
  font-size: 12px; font-weight: 800; letter-spacing: 0.04em; margin-bottom: 14px;
}
.readiness-card h3 { font-size: 17px; font-weight: 700; margin-bottom: 8px; }
.readiness-card p { color: var(--muted); font-size: 14px; line-height: 1.65; margin-bottom: 16px; }

/* ── Case Filter Bar ── */
.filter-bar {
  width: var(--content); margin: -40px auto 0; position: relative; z-index: 20;
  padding: 20px 24px; border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--card-bg); box-shadow: var(--shadow-md);
  display: flex; flex-direction: column; gap: 14px;
}
.filter-group { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.filter-label { font-size: 13px; font-weight: 700; color: var(--muted); min-width: 44px; }
.filter-options { display: flex; gap: 8px; flex-wrap: wrap; }
.filter-chip {
  padding: 6px 14px; border: 1px solid var(--line); border-radius: 999px;
  background: var(--surface-soft); color: var(--text);
  font-size: 13px; font-weight: 600; cursor: pointer;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}
.filter-chip:hover { border-color: var(--blue); color: var(--blue); }
.filter-chip.is-active { background: var(--blue); border-color: var(--blue); color: #fff; }
.filter-result { font-size: 13px; color: var(--muted); font-weight: 600; margin: 0; }

/* ── Anchor Nav ── */
.anchor-nav {
  position: sticky; top: var(--nav-h); z-index: 60;
  display: flex; gap: 8px;
  width: var(--content); margin: -8px auto 0;
  padding: 12px; overflow-x: auto;
  background: var(--surface-tint); -webkit-backdrop-filter: blur(20px); backdrop-filter: blur(20px);
  border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}
.anchor-nav a {
  display: inline-flex; align-items: center; gap: 8px;
  flex: 1 1 auto; min-width: 150px;
  padding: 12px 16px; border-radius: calc(var(--radius) - 2px);
  background: var(--surface-soft); border: 1px solid var(--line);
  font-size: 14px; font-weight: 700; color: var(--text);
  text-decoration: none; white-space: nowrap;
  transition: 0.2s;
}
.anchor-nav a span {
  display: inline-flex; align-items: center; justify-content: center;
  width: 24px; height: 24px; border-radius: 50%;
  background: var(--blue); color: #fff; font-size: 12px; font-weight: 800;
}
.anchor-nav a:hover { border-color: rgba(var(--blue-rgb),0.4); color: var(--blue-strong); }
.anchor-nav a:hover span { background: var(--blue-strong); }

@media (max-width: 720px) {
  .anchor-nav { margin-top: -4px; padding: 10px; }
  .anchor-nav a { min-width: 130px; }
}

/* ── FAQ ── */
.faq-list {
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--surface); overflow: hidden;
}
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list details:last-child { border-bottom: 0; }
.faq-list summary {
  position: relative; padding: 22px 56px 22px 24px;
  font-size: 16px; font-weight: 700; color: var(--ink);
  list-style: none; cursor: pointer;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after {
  position: absolute; top: 50%; right: 24px; content: "+";
  font-size: 22px; font-weight: 500; color: var(--blue);
  transform: translateY(-50%);
}
.faq-list details[open] summary::after { content: "−"; }
.faq-list p { max-width: 800px; padding: 0 24px 22px; color: var(--muted); font-size: 15px; line-height: 1.75; }

/* ── CTA Band ── */
.cta-band {
  width: var(--content); margin: 0 auto; padding: 0 0 var(--section-py);
}
.cta-panel {
  display: flex; align-items: center; justify-content: space-between;
  gap: 32px; padding: 48px;
  background: var(--board); color: #fff;
  border-radius: var(--radius-lg); position: relative; overflow: hidden;
}
.cta-panel::before {
  content: ""; position: absolute; top: -80px; right: -80px;
  width: 320px; height: 320px; border-radius: 50%;
  background: radial-gradient(circle, rgba(var(--blue-rgb),0.15) 0%, transparent 60%);
  pointer-events: none;
}
.cta-panel h2 { font-size: 30px; font-weight: 800; letter-spacing: -0.01em; color: #fff; }
.cta-panel p { margin-top: 8px; max-width: 560px; color: rgba(255,255,255,0.7); font-size: 15px; line-height: 1.7; }
.cta-panel .secondary-button { color: #fff; border-color: rgba(255, 255, 255, 0.7); }
.cta-panel .secondary-button:hover { background: rgba(255,255,255,0.15); }

/* ── Overview Grid ── */
.overview-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.overview-card {
  padding: 32px 28px;
  background: var(--surface);
  transition: transform 0.25s, box-shadow 0.25s;
}
.overview-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }

.page-content { width: var(--content); margin: 0 auto; padding: 80px 0; }

/* ── Meta List ── */
.meta-list { display: grid; gap: 0; }
.meta-list p {
  display: grid; grid-template-columns: 140px 1fr; gap: 20px;
  padding: 14px 0; border-bottom: 1px solid var(--line);
  font-size: 15px; color: var(--text);
}
.meta-list p:last-child { border-bottom: none; }
.meta-list span { color: var(--muted); font-weight: 600; }
.meta-list strong { color: var(--ink); font-weight: 700; }

/* ── QR/Contact ── */
.qr-card { display: grid; place-items: center; gap: 16px; padding: 20px; }
.qr-card img { border-radius: 12px; object-fit: cover; border: 1px solid var(--line); }
.qr-card figcaption { font-size: 13px; color: var(--muted); font-weight: 600; }
.social-channel-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 20px; }
.social-qr-card { padding: 24px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.social-qr-card h3 { font-size: 16px; font-weight: 700; margin: 8px 0; }
.social-channel-grid-three { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }

.contact-inner { display: grid; grid-template-columns: 1.4fr 1fr; gap: 48px; align-items: start; }
.contact-details { display: grid; gap: 16px; }
.contact-list { display: grid; gap: 12px; }
.contact-list p { display: grid; grid-template-columns: 90px 1fr; gap: 12px; font-size: 15px; color: var(--text); }
.contact-list span { color: var(--muted); font-weight: 600; }
.contact-social-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin-top: 28px; }

/* ═══════════════════════════════════════════════
   FOOTER
   ═══════════════════════════════════════════════ */
.site-footer {
  padding: 48px max(var(--gutter), calc((100% - var(--content-wide-max)) / 2)) 40px;
  border-top: 1px solid var(--line); background: var(--surface-soft);
  color: var(--muted);
}
.footer-main {
  display: grid; grid-template-columns: 1.4fr repeat(4, minmax(120px, 1fr));
  gap: 24px;
}
.footer-brand strong { font-size: 16px; font-weight: 700; color: var(--text); }
.footer-brand p { margin: 8px 0 12px; color: var(--muted); font-size: 13px; line-height: 1.6; }
.footer-site-link { color: var(--blue); font-size: 13px; font-weight: 600; text-decoration: none; }
.footer-group { display: grid; align-content: start; gap: 10px; }
.footer-group strong { font-size: 13px; font-weight: 700; color: var(--text); }
.footer-group a, .footer-group span { font-size: 13px; color: var(--muted); text-decoration: none; line-height: 1.5; }
.footer-group a:hover { color: var(--blue); }
.footer-records {
  display: flex; flex-wrap: wrap; gap: 8px 20px;
  margin-top: 32px; padding-top: 16px;
  border-top: 1px solid var(--line);
  color: var(--muted); font-size: 13px;
}
.footer-records a { color: var(--blue); text-decoration: none; }

/* ═══════════════════════════════════════════════
   FORM
   ═══════════════════════════════════════════════ */
.contact-form { display: grid; gap: 16px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.contact-form input, .contact-form select, .contact-form textarea {
  width: 100%; padding: 14px 16px;
  border: 1px solid var(--line-strong); border-radius: var(--radius);
  background: var(--surface); color: var(--ink);
  font-family: inherit; font-size: 15px; outline: none;
  transition: border-color 0.2s;
}
.contact-form input:focus, .contact-form select:focus, .contact-form textarea:focus {
  border-color: var(--blue); box-shadow: 0 0 0 4px rgba(var(--blue-rgb),0.12);
}
.contact-form label { display: block; font-size: 13px; font-weight: 600; color: var(--text); margin-bottom: 4px; }
.contact-form textarea { resize: vertical; min-height: 120px; }

.guarantee-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.guarantee-grid article {
  padding: 24px;
  background: var(--surface); text-align: center;
}
.guarantee-grid h3 { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
.guarantee-grid p { color: var(--muted); font-size: 13px; line-height: 1.6; }

/* ── Mobile Bottom Bar ── */
.mobile-consult-bar {
  position: fixed; right: 0; bottom: 0; left: 0; z-index: 90;
  display: none; grid-template-columns: 1fr 1fr; height: 60px;
  background: var(--surface-tint); -webkit-backdrop-filter: blur(20px); backdrop-filter: blur(20px);
  border-top: 1px solid var(--line);
}
.mobile-consult-bar a {
  display: grid; place-items: center;
  font-size: 15px; font-weight: 700; text-decoration: none;
}
.mobile-consult-bar a:first-child { color: var(--ink); border-right: 1px solid var(--line); }
.mobile-consult-bar a:last-child { background: var(--blue); color: #fff; }

.back-to-top {
  position: fixed; right: 24px; bottom: 24px; z-index: 88;
  width: 42px; height: 42px; border-radius: 50%;
  background: var(--surface); color: var(--blue);
  border: 1px solid var(--line); font-size: 18px; font-weight: 600;
  cursor: pointer; opacity: 0; pointer-events: none;
  transform: translateY(10px); transition: 0.2s;
  display: grid; place-items: center;
}
.back-to-top.is-visible { opacity: 1; pointer-events: auto; transform: translateY(0); }

/* ═══════════════════════════════════════════════
   SCROLL REVEAL
   ═══════════════════════════════════════════════ */
/* Default visible — CSP-clean, no inline <style>/<noscript> dependency.
   JS-disabled visitors see full content (no white screen). */
[data-reveal] {
  opacity: 1;
  transform: none;
}
/* Scroll-reveal animation only applies when JS is active (html.js set by script.js at load). */
html.js [data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}
html.js [data-reveal].is-revealed {
  opacity: 1;
  transform: translateY(0);
}

/* ═══════════════════════════════════════════════
   v3.5 FIX — 7 classes used 135+ times in HTML but previously UNDEFINED in CSS.
   Added with design-system-consistent styling (semantic vars only, dark-mode safe).
   ═══════════════════════════════════════════════ */
/* --surface-tint 是半透明 token，只应配合 backdrop-filter 使用（见 .site-header）。
   色带是实心区块，与 .trust-band 统一用 --surface-soft，避免同页两种色带外观。 */
/* v3.6 (designer #3)：色带全出血——.section 已改为满宽 + padding-inline 收口，
   背景直接铺在 .section-band 本体上即可天然铺满，无需 ::before / vw / z-index 负值。
   内容仍由 padding-inline 约束在 --content-max 内居中。 */
.section-band {
  background: var(--surface-soft);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
/* 相邻色带之间不重复描边 */
.section-band + .section-band,
.trust-band + .section-band,
.section-band + .trust-band { border-top: 0; }
/* 必须写成 .section.compact-section：断点内 .section 会重新声明 padding，
   同为单类选择器时后声明获胜，紧凑区块会在 ≤720px 失效（v3.5 回归）。
   用特异性取胜而非依赖源码顺序，避免今后新增断点再次踩坑。 */
.section.compact-section { padding-block: 48px; }
.section-actions {
  display: flex; flex-wrap: wrap; gap: 14px; justify-content: center;
  margin-top: 32px;
}
/* 不要给 featured 卡加 background：--surface-tint 合成后与色带底几乎同色，
   精选卡反而在色带里消失。仅靠蓝色描边 + 辉光区分。 */
.scenario-card.scenario-featured {
  border-color: rgba(var(--blue-rgb), 0.35);
  box-shadow: 0 6px 24px rgba(var(--blue-rgb), 0.10);
}
/* v3.5 FIX (designer-2): banded sections sit on --surface-soft, but several cards
   use --surface-soft / --surface fills that collapse to ~0 contrast against the band
   (esp. on technology.html architecture cards). --surface / --surface-soft invert order
   between light/dark themes, so a fill fix is impossible — use a stronger border instead.
   :not(.featured) guards preserve the blue accent borders on featured cards. */
.section-band .scenario-card:not(.scenario-featured),
.section-band .detail-card,
.section-band .feature-card,
.section-band .process-card,
.section-band .overview-card,
.section-band .bundle-card:not(.bundle-featured),
.section-band .token-pack-card:not(.token-pack-featured) {
  border-color: var(--line-strong);
}
.contact-copy { max-width: 60ch; }
.contact-copy h2 { font-size: 26px; font-weight: 700; letter-spacing: -0.01em; margin-bottom: 16px; }
.contact-copy p { color: var(--muted); line-height: 1.7; margin-bottom: 14px; }
.trust-copy { color: var(--muted); line-height: 1.7; }
.trust-copy strong { color: var(--text); }
.process-meta { margin-top: 10px; font-size: 13px; color: var(--muted); line-height: 1.6; }

/* ═══════════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════════ */

@media (max-width: 1180px) {
  .guarantee-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .process-grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 1080px) {
  .site-nav { display: none; }
  .menu-toggle { display: block; }
  .header-actions { display: none; }

  .site-nav.is-open {
    position: fixed; top: var(--nav-h); right: 12px; left: 12px; z-index: 98;
    display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px;
    padding: 14px; background: var(--surface);
    border: 1px solid var(--line); border-radius: var(--radius);
    box-shadow: var(--shadow-md); max-height: calc(100svh - 90px); overflow: auto;
  }
  .site-nav.is-open a {
    display: flex; align-items: center; height: 44px;
    padding: 0 14px; border-radius: 8px;
    background: var(--surface-soft); border: 1px solid var(--line);
  }
  .site-nav.is-open a::after { display: none; }

  .capability-grid, .scenario-grid, .bundle-grid { grid-template-columns: 1fr; }
  .process-grid { grid-template-columns: 1fr; }
  .three-col-grid { grid-template-columns: 1fr; }
  .two-col-grid { grid-template-columns: 1fr; }
  .readiness-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .token-pack-grid { grid-template-columns: 1fr; }

  /* v5.3 视觉统一：hero 两列在平板区间收为单列（与全站二列栅格同断点） */
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero-copy { max-width: none; }
  .hero-art { max-width: 560px; }
}

@media (max-width: 720px) {
  /* 铁律：新增任何「内容宽度类」token，都必须在这个断点里同步收窄，
     否则不同元素左右留白不一致、移动端左缘横跳（designer-2 复核发现）。
     --gutter 在此收窄为 20px，使 .section 与 legacy 元素在 ≤720px 齐平。
     --content-wide-max 是纯 max 值（= 1388 设计宽 − 2×24 gutter），本身不随断点变，
     故此处故意不收窄它——它的内容宽由 max(gutter, (100% − max)/2) 在窄屏自动退化为 gutter。 */
  :root { --content: calc(100% - 40px); --gutter: 20px; --nav-h: 56px; }

  body { padding-bottom: 60px; }

  .site-header { min-height: var(--nav-h); padding-block: 6px; }
  .brand img { width: 40px; height: 40px; }

  .hero-grid { padding-top: 20px; }
  .hero h1 { font-size: 40px; }
  .hero-lead { font-size: 17px; }

  /* 用 padding-block 而非 padding 简写：简写会连带把左右内边距重置为 0，
     日后若给色带加 padding-inline gutter 会被静默清掉 */
  .section { padding-block: 66px; }
  .section-heading h2 { font-size: 32px; }
  .section-heading p { font-size: 16px; }

  .page-hero { padding: 130px 0 60px; }
  .page-hero h1 { font-size: 40px; }
  .page-hero p { font-size: 16px; }

  .trust-stats { gap: 24px; }
  .trust-num { font-size: 26px; }

  .feature-card, .scenario-card, .detail-card, .bundle-card { padding: 24px 20px; }
  .feature-card h3 { font-size: 18px; }

  .cta-panel { display: grid; gap: 20px; padding: 32px 24px; }
  .cta-panel h2 { font-size: 24px; }

  .footer-main { grid-template-columns: 1fr; gap: 24px; }
  .footer-records { display: grid; gap: 6px; }

  .mobile-consult-bar { display: grid; }
  .back-to-top { bottom: 76px; right: 16px; }

  .form-grid { grid-template-columns: 1fr; }
  .guarantee-grid { grid-template-columns: 1fr; }

  /* v3.5 fix: these grids never collapsed → broken at <=720px (incl. 375px) */
  .overview-grid,
  .contact-inner,
  .social-channel-grid-three { grid-template-columns: 1fr; }
  .contact-inner { gap: 32px; }
  .footer-main { gap: 20px; }

  .comparison-table th, .comparison-table td { padding: 10px 8px; font-size: 13px; }
  .comparison-table tbody th { font-size: 12px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0.01ms !important; animation: none !important; }
}

/* ===== v3.5 新增：表单兜底 / 量纲标注 / 二维码占位 ===== */

/* 表单提交兜底面板：邮件客户端缺失时的三条备用联系路径 */
.form-fallback {
  display: none;
  margin-top: 20px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-soft);
}
.form-fallback.is-visible { display: block; }
.form-fallback p { margin: 0 0 8px; color: var(--text); font-size: 14px; line-height: 1.6; }
.form-fallback-title { color: var(--ink); font-weight: 600; }
.form-fallback-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 14px; }
.form-fallback-actions .secondary-button { font-size: 14px; }

.visually-hidden-copy {
  position: absolute;
  left: -9999px;
  top: 0;
  opacity: 0;
}

/* 算力/认证量纲标注：口径与主数值同格但视觉降级，避免不同精度被横向误读 */
.spec-unit {
  display: block;
  margin-top: 2px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.4;
}
.spec-note {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}
.spec-note code {
  padding: 1px 5px;
  border-radius: 4px;
  background: var(--line-soft);
  font-size: 12px;
}

/* 未交付资源的诚实占位，禁止用真实资源冒充 */
.qr-pending {
  display: grid;
  place-items: center;
  gap: 6px;
  width: 100%;
  aspect-ratio: 1 / 1;
  max-width: 200px;
  margin-inline: auto;
  padding: 12px;
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius);
  background: var(--surface-soft);
  color: var(--muted);
  font-size: 13px;
  text-align: center;
}
.qr-pending strong { color: var(--text); font-size: 14px; font-weight: 600; }

@media (max-width: 720px) {
  .form-fallback-actions { display: grid; }
  .form-fallback-actions .secondary-button { text-align: center; }
}

/* ═══════════════════════════════════════════════
   v3.6 新增：内容页样式（技术能力 / 新闻 / 案例详情）
   ═══════════════════════════════════════════════ */

.article-hero,
.case-hero { text-align: left; }

.article-meta {
  margin-top: 14px;
  color: var(--muted);
  font-size: 14px;
}

/* v3.7：同 .section.trust-band —— 必须带 .section 前缀取 (0,2,0)。
   裸 .article-body 目前只是「源序恰好在 @720 .section 之后」才生效，
   一旦媒体查询被挪到文件末尾就会静默失效。 */
.section.article-body {
  padding-top: 64px;
  padding-bottom: 64px;
}

.article-content {
  max-width: 720px;
  margin-inline: auto;
}

.article-content h2 {
  margin: 48px 0 16px;
  color: var(--ink);
  font-size: 24px;
  font-weight: 600;
  line-height: 1.35;
}

.article-content h3 {
  margin: 32px 0 12px;
  color: var(--ink);
  font-size: 20px;
  font-weight: 600;
}

.article-content p {
  margin: 0 0 18px;
  color: var(--text);
  font-size: 17px;
  line-height: 1.85;
}

.article-content ul,
.article-content ol {
  margin: 0 0 24px 20px;
  color: var(--text);
  font-size: 17px;
  line-height: 1.8;
}

.article-content li { margin-bottom: 8px; }

.article-tags {
  justify-content: center;
  margin-top: 40px;
  padding-top: 32px;
  border-top: 1px solid var(--line);
}

.section.case-metrics {
  padding-top: 48px;
  padding-bottom: 48px;
  background: var(--surface-soft);
}

.case-metrics .trust-stats {
  flex-wrap: wrap;
  gap: 32px;
}

.case-story .two-col-grid {
  align-items: stretch;
}

.case-story .detail-card {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
}

.case-quote {
  max-width: 720px;
  margin-inline: auto;
  padding: 32px 40px;
  border-left: 4px solid var(--blue);
  border-radius: 0 var(--radius) var(--radius) 0;
  background: var(--surface-soft);
}

.case-quote p {
  margin: 0;
  color: var(--ink);
  font-size: 20px;
  font-style: italic;
  line-height: 1.7;
}

.news-grid .scenario-card {
  text-decoration: none;
}

.news-grid .scenario-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.technology-page .feature-card ul {
  margin: 16px 0 0 18px;
  color: var(--text);
  font-size: 14px;
  line-height: 1.75;
}

@media (max-width: 720px) {
  .article-content h2 { font-size: 21px; }
  .article-content p,
  .article-content ul,
  .article-content ol { font-size: 16px; }
  .case-quote { padding: 24px; }
  .case-quote p { font-size: 18px; }
}

/* ═══════════════════════════════════════════════
   v4.0 新增：产品中心 / 详情页 / 成品中心 / 定制页 / 首页入口
   全部沿用既有 Apple 浅色体系 token，不触碰任何既有选择器。
   ═══════════════════════════════════════════════ */

/* ── CTA 双按钮容器（cta_panel 的 link2 分支）── */
.cta-actions {
  display: flex; flex-wrap: wrap; gap: 12px;
  flex: 0 0 auto;
}

/* ── 产品中心：搜索框 ── */
.product-search-bar {
  width: var(--content);
  margin: -40px auto 0;           /* 上浮到 page-hero 底部，同案例页 filter-bar 手法 */
  position: relative; z-index: 20;
  display: flex; align-items: center; gap: 10px;
  height: 56px; padding: 0 20px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 999px;
  box-shadow: var(--shadow-md);
}
.product-search-icon { flex: 0 0 auto; color: var(--muted); }
.product-search-input {
  flex: 1 1 auto; min-width: 0; height: 100%;
  border: none; outline: none; background: transparent;
  color: var(--ink); font-size: 16px;
}
.product-search-input::placeholder { color: var(--muted-2); }
.product-search-input::-webkit-search-cancel-button { -webkit-appearance: none; }

/* ── 产品中心：筛选栏（覆盖 .filter-bar 的上浮 margin，改为贴合搜索框）── */
.product-filter-bar { margin-top: 16px; }
.product-result { margin-top: 4px; }

/* ── 产品卡片网格（产品中心 / 成品中心 / 首页成品预览共用）── */
.product-grid {
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px;
  align-items: stretch;
}
.product-card {
  display: flex; flex-direction: column;
  background: var(--card-bg);
  border: 1px solid var(--line); border-radius: var(--radius);
  transition: transform 0.25s, box-shadow 0.25s;
}
.product-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.product-card-link {
  display: flex; flex-direction: column; height: 100%;
  text-decoration: none;
}
.product-card-media {
  display: grid; place-items: center;
  aspect-ratio: 16 / 9; padding: 24px;
  background: var(--surface-soft);
  border-bottom: 1px solid var(--line);
  border-radius: var(--radius) var(--radius) 0 0;
  overflow: hidden;
}
.product-card-media img { max-height: 84px; width: auto; object-fit: contain; }
.product-card-glyph {
  display: grid; place-items: center;
  width: 64px; height: 64px; border-radius: 16px;
  background: var(--blue-soft); color: var(--blue-strong);
  font-size: 28px; font-weight: 800;
}
.product-card-body {
  display: flex; flex-direction: column; flex: 1 1 auto;
  padding: 24px 24px 20px;
}
.product-card-type {
  font-size: 12px; font-weight: 700; letter-spacing: 0.04em; text-transform: uppercase;
  color: var(--blue-strong);
}
.product-card h3 { font-size: 17px; font-weight: 700; line-height: 1.3; margin: 8px 0 10px; }
.product-card-tags {
  display: flex; flex-wrap: wrap; gap: 6px; margin: 0 0 12px;
}
.product-card-tags span {
  padding: 2px 8px; border-radius: 999px;
  background: var(--tag-bg); border: 1px solid var(--tag-border);
  color: var(--tag-fg); font-size: 12px; line-height: 1.5;
}
.product-card-summary {
  margin: 0 0 auto; color: var(--muted); font-size: 14px; line-height: 1.7;
}
.product-card .card-meta { margin-top: 16px; }

.section.product-decision { padding-bottom: 48px; }
.decision-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.decision-card { display: flex; flex-direction: column; min-height: 220px; padding: 28px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); text-decoration: none; transition: transform .25s, box-shadow .25s, border-color .25s; }
.decision-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: rgba(var(--blue-rgb),.35); }
.decision-card > span { color: var(--blue-strong); font-size: 12px; font-weight: 800; }
.decision-card h3 { margin: 18px 0 8px; font-size: 20px; }
.decision-card p { color: var(--muted); font-size: 14px; line-height: 1.7; }
.decision-card strong { margin-top: auto; padding-top: 20px; color: var(--blue-strong); font-size: 14px; }
.product-list-heading { margin-bottom: 28px; }
.product-fit-summary { display: flex; flex-wrap: wrap; gap: 8px 12px; margin-top: 24px; padding: 14px 16px; border: 1px solid rgba(255,255,255,.18); border-radius: var(--radius); background: rgba(0,0,0,.22); color: rgba(255,255,255,.72); font-size: 13px; }
.product-fit-summary strong { color: #fff; }
.spec-disclaimer { max-width: 760px; margin: -24px 0 20px; color: var(--muted); font-size: 14px; line-height: 1.7; }

/* ── 产品详情页：七段布局 ── */
.check-list { max-width: 720px; }
.check-list li {
  position: relative; padding-left: 28px; margin-bottom: 12px;
  list-style: none; color: var(--text); font-size: 16px; line-height: 1.7;
}
.check-list li::before {
  content: "✓"; position: absolute; left: 0; top: 0;
  color: var(--blue); font-weight: 700;
}
.scenario-tags { margin-top: 24px; }
.product-tiny-grid {
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px;
}
.part-card {
  display: flex; flex-direction: column; gap: 6px;
  padding: 20px; background: var(--card-bg);
  border: 1px solid var(--line); border-radius: var(--radius);
  text-decoration: none;
  transition: transform 0.25s, box-shadow 0.25s;
}
.part-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.part-card h3 { font-size: 15px; font-weight: 700; line-height: 1.35; }
.part-card .product-card-tags { margin-bottom: 0; }
.solution-link-list { display: flex; flex-wrap: wrap; gap: 12px; }
.solution-link {
  padding: 10px 18px; border-radius: 999px;
  background: var(--surface); border: 1px solid var(--line-strong);
  color: var(--ink); font-size: 14px; font-weight: 600; text-decoration: none;
  transition: border-color 0.2s, color 0.2s;
}
.solution-link:hover { border-color: var(--blue); color: var(--blue-strong); }

/* ── 成品中心：零部件 → 成品组合链 ── */
.combo-list { display: grid; gap: 16px; }
.combo-chain {
  display: flex; align-items: center; flex-wrap: wrap; gap: 12px;
  padding: 20px 24px;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
}
.combo-parts { display: flex; align-items: center; flex-wrap: wrap; gap: 10px; }
.combo-part, .combo-result {
  padding: 8px 16px; border-radius: 999px;
  font-size: 14px; font-weight: 600; text-decoration: none;
}
.combo-part {
  background: var(--surface-soft); border: 1px solid var(--line); color: var(--text);
}
.combo-part:hover { border-color: var(--blue); color: var(--blue); }
.combo-times { color: var(--muted-2); font-weight: 700; }
.combo-arrow { color: var(--blue); font-weight: 800; font-size: 18px; }
.combo-result {
  background: var(--blue); color: #fff;
  box-shadow: 0 8px 20px rgba(var(--blue-rgb), 0.25);
}
.combo-result:hover { background: var(--blue-strong); }
.part-grid {
  display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px;
}

/* ── 定制页：5 步流程（process-grid 修饰类，无需重定义网格）── */
.process-grid.customize-steps { max-width: 960px; margin-inline: auto; }

/* ── 首页：你需要什么？入口网格 ──
   need-band 是 .section 修饰类，不声明盒模型属性（static-guard 特异性规则）。 */
.need-grid {
  display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 16px;
}
.need-card {
  display: flex; flex-direction: column; gap: 10px;
  padding: 24px 20px;
  background: var(--card-bg); border: 1px solid var(--line); border-radius: var(--radius);
  text-decoration: none;
  transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
}
.need-card:hover {
  transform: translateY(-3px); box-shadow: var(--shadow-md);
  border-color: rgba(var(--blue-rgb), 0.35);
}
.need-icon {
  display: grid; place-items: center;
  width: 44px; height: 44px; border-radius: 12px;
  background: var(--blue-soft); color: var(--blue-strong);
}
.need-card h3 { font-size: 15px; font-weight: 700; line-height: 1.3; }
.need-card p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.6; }
.need-card .card-meta { margin-top: 4px; }

/* ── v4.0 响应式 ── */
@media (max-width: 1080px) {
  .need-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .product-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .part-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .product-tiny-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 720px) {
  .product-search-bar { margin-top: -24px; }
  .need-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .product-grid, .part-grid, .product-tiny-grid { grid-template-columns: 1fr; }
  .combo-chain { padding: 16px; }
  .process-grid.customize-steps { margin-inline: 0; }
  .need-card { padding: 20px 16px; }
  .decision-grid { grid-template-columns: 1fr; }
  .decision-card { min-height: 0; padding: 22px 20px; }
}

/* JX Mind v4.1 智能搜索推荐面板（产品中心搜索结果上方） */
.intent-panel {
  margin-top: 16px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface-soft);
}
.intent-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.intent-title { font-weight: 600; color: var(--ink); }
.intent-intro { margin: 4px 0 12px; font-size: 14px; color: var(--muted); }
.intent-parts { display: flex; flex-wrap: wrap; gap: 8px; }
.intent-chip {
  padding: 7px 14px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: var(--surface);
  font-size: 14px;
  color: var(--text);
  transition: border-color 0.2s, color 0.2s;
}
.intent-chip:hover { border-color: var(--blue); color: var(--blue); }
.intent-combo { margin-top: 14px; font-size: 15px; }
.intent-combo span { color: var(--muted); }
.intent-combo a { font-weight: 600; color: var(--blue); }
.intent-custom {
  display: inline-block;
  padding: 9px 18px;
  border-radius: 999px;
  background: var(--blue);
  color: #fff;
  font-weight: 600;
  font-size: 14px;
}
.intent-custom:hover { background: var(--blue-strong); }
.intent-empty {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: 14px;
  padding: 14px 18px;
  border-radius: 10px;
  background: var(--surface-soft);
  color: var(--text);
}
.intent-empty p { font-size: 14px; }

/* v4.1 定制表单隐私承诺 */
.form-note { font-size: 13px; color: var(--muted); }

/* v4.2 产品详情 FAQ（details/summary 纯 HTML 折叠） */
.faq-list { display: grid; gap: 10px; max-width: 860px; }
.faq-item {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
}
.faq-item summary {
  padding: 14px 46px 14px 18px;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
  position: relative;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--muted);
  font-weight: 400;
}
.faq-item[open] summary::after { content: "–"; }
.faq-item p {
  padding: 0 18px 16px;
  color: var(--text);
  font-size: 15px;
}

/* ═══════════════════════════════════════════════
   APPLE 设计精炼层 · v5.0 抛光
   目标：更简洁的留白节奏 · 更精致的质感与层次 · 更细腻的微交互。
   原则：仅叠加 / 微调既有语义 token 与既有类选择器，不改动任何 HTML 结构，
        严格 CSP 兼容（无 inline style / 无外部依赖）。本段可整体删除回滚。
   ═══════════════════════════════════════════════ */

/* ── 1. 全局质感：正文字距收敛 + 选区高亮 ── */
body { letter-spacing: -0.006em; }
::selection { background: rgba(var(--blue-rgb), 0.18); color: var(--ink); }

/* ── 2. 导航：滚动后更扎实的毛玻璃质感 ── */
.site-header.is-scrolled {
  background: var(--surface-tint);
  box-shadow: 0 1px 0 var(--line), 0 10px 34px rgba(0,0,0,0.07);
  backdrop-filter: saturate(180%) blur(28px);
  -webkit-backdrop-filter: saturate(180%) blur(28px);
}

/* ── 3. 按钮：统一 Apple 缓动 + 悬停微缩放 ── */
.primary-button, .secondary-button {
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease),
              background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.primary-button:hover, .secondary-button:hover { transform: translateY(-1px) scale(1.012); }
.compact-button:hover { transform: translateY(-1px) scale(1.012); }

/* ── 4. 卡片：柔和抬升 + 大扩散阴影（保留各自 border-color 与背景）── */
.feature-card, .detail-card, .scenario-card, .process-card,
.bundle-card, .token-pack-card, .overview-card, .readiness-card,
.product-card, .need-card, .part-card, .decision-card, .guarantee-grid article {
  transition: transform var(--dur) var(--ease-out), box-shadow var(--dur) var(--ease-out), border-color var(--dur) var(--ease-out);
}
.feature-card:hover, .detail-card:hover, .scenario-card:hover, .process-card:hover,
.bundle-card:hover, .token-pack-card:hover, .overview-card:hover, .readiness-card:hover,
.product-card:hover, .need-card:hover, .part-card:hover, .decision-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

/* ── 5. 滚动渐显：更克制的距离 + 更舒缓的时长（Apple 呼吸感）── */
html.js [data-reveal] {
  transform: translateY(18px);
  transition: opacity 0.9s var(--ease-out), transform 0.9s var(--ease-out);
}

/* ── 6. Hero：更宽留白、更紧字距、更克制的光晕（v5.3 浅色两列对齐母站，去除旧暗色压暗渐变）── */
.hero h1 { letter-spacing: -0.03em; font-weight: 800; }
.hero-lead { max-width: 600px; }
.hero-overlay {
  background:
    radial-gradient(1100px 560px at 78% 18%, var(--hero-glow-primary) 0%, transparent 62%),
    radial-gradient(860px 500px at 12% 88%, var(--hero-glow-two) 0%, transparent 58%);
}
.tag-list { margin-top: 40px; gap: 10px; }

/* ── 7. 段落标题：更宽阅读宽度 + 略大引文 ── */
.section-heading { max-width: 760px; }
.section-heading p { font-size: 18px; line-height: 1.6; }

/* ── 8. 页面英雄：收窄文本栏，贴近 Apple 窄栏 ── */
.page-hero { padding: 168px 0 88px; }
.page-hero-inner { max-width: 980px; }
.page-hero p { max-width: var(--measure); }

/* ── 9. CTA 面板：更大圆角 + 更舒展留白 ── */
.cta-panel { border-radius: var(--radius-lg); padding: 56px; box-shadow: var(--shadow-md); }
.cta-panel h2 { font-size: 32px; }

/* ── 10. 胶囊筛选 / 锚点导航：圆角一致 + 缓动统一 ── */
.filter-chip, .solution-link, .intent-chip {
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.anchor-nav, .filter-bar, .product-search-bar, .intent-panel, .faq-item, .faq-list {
  border-radius: var(--radius);
}
.anchor-nav a { transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease), background var(--dur) var(--ease); }

/* ── 11. 表单控件：圆角与缓动统一 ── */
.contact-form input, .contact-form select, .contact-form textarea {
  border-radius: var(--radius);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

/* ── 12. 文章正文：更克制的段间距与阅读宽度 ── */
.article-content { max-width: var(--measure); }
.article-content p, .article-content ul, .article-content ol { line-height: 1.8; }

/* ═══════════════════════════════════════════════
   v5.2 产品线 / 业务线迭代组件
   choice（双入口）· model-step（四步交付模型）
   business-line（四大业务线三列）· matrix（分流矩阵）
   仅用独立类 + 既有 token；.section 修饰类不声明盒模型（static-guard）。
   ═══════════════════════════════════════════════ */

/* ── 产品目录区：复位搜索框的上浮负 margin（该手法只用于紧跟 hero）── */
#productGrid .product-search-bar { margin: 0 auto; }
#productGrid .product-filter-bar { margin-top: 14px; }

/* ── 双入口（choice）：首页两扇门，也做板块间互链 ── */
.choice-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; margin-top: 44px; }
.choice-card {
  position: relative; display: flex; flex-direction: column; align-items: flex-start; gap: 12px;
  padding: 42px 38px; overflow: hidden;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-xl);
  text-decoration: none;
  transition: transform var(--dur) var(--ease-out), box-shadow var(--dur) var(--ease-out), border-color var(--dur) var(--ease-out);
}
.choice-card::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(640px 300px at 92% -18%, rgba(var(--blue-rgb), 0.09) 0%, transparent 62%);
}
.choice-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: rgba(var(--blue-rgb), 0.32); }
.choice-no { font-size: 12px; font-weight: 800; letter-spacing: 0.09em; color: var(--blue-strong); }
.choice-card h3 { font-size: 25px; font-weight: 800; letter-spacing: -0.015em; line-height: 1.25; }
.choice-card > p { color: var(--muted); font-size: 15px; line-height: 1.7; max-width: 46ch; }
.choice-card .pill-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 4px; }
.choice-pill {
  padding: 5px 13px; border-radius: 999px;
  background: var(--surface-soft); border: 1px solid var(--line);
  color: var(--text); font-size: 13px; line-height: 1.5;
}
.choice-card .card-meta { margin-top: 6px; }

/* ── 四步交付模型（model-step）── */
.model-step-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; margin-top: 44px; }
.model-step {
  position: relative;
  padding: 28px 24px 24px;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  transition: transform var(--dur) var(--ease-out), box-shadow var(--dur) var(--ease-out);
}
.model-step:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.model-step::after {
  content: "→"; position: absolute; right: 16px; top: 24px;
  color: var(--line-strong); font-size: 18px; font-weight: 800;
}
.model-step:last-child::after { content: none; }
.model-step-no { display: block; font-size: 12px; font-weight: 800; letter-spacing: 0.08em; color: var(--blue-strong); margin-bottom: 12px; }
.model-step h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.model-step p { color: var(--muted); font-size: 14px; line-height: 1.7; }

/* ── 板块标题（board-heading）：放宽宽度承载对齐说明 ── */
.section-heading.board-heading { max-width: 880px; }

/* ── 业务线三列（business-line）── */
.business-line-grid {
  display: grid; grid-template-columns: 2.1fr 1.1fr 1.9fr; gap: 20px; align-items: stretch;
  margin-top: 44px;
}
.business-col {
  display: flex; flex-direction: column;
  padding: 28px; background: var(--surface);
  border: 1px solid var(--line); border-radius: var(--radius);
}
.business-col h3 { font-size: 15px; font-weight: 700; color: var(--ink); margin-bottom: 16px; }
.business-col .combo-parts { gap: 8px; }
.business-synergy {
  margin-top: auto; padding-top: 14px;
  border-top: 1px dashed var(--line-strong);
  font-size: 13px; color: var(--muted-2);
}
.business-col .combo-parts + .business-synergy { margin-top: 18px; }

/* 交付路径（path-steps）：纵向步骤条 */
.path-steps { list-style: none; display: grid; }
.path-steps li {
  display: flex; align-items: center; gap: 12px;
  padding: 11px 0; border-bottom: 1px solid var(--line-soft);
  font-size: 15px; color: var(--text);
}
.path-steps li:last-child { border-bottom: 0; }
.path-steps span {
  flex: 0 0 28px; display: inline-grid; place-items: center;
  width: 28px; height: 28px; border-radius: 999px;
  background: var(--blue-soft); color: var(--blue-strong);
  font-size: 12px; font-weight: 800;
}

/* 交付结果列：高亮结论 + 紧凑卡片单列 */
.business-col-results { background: linear-gradient(180deg, var(--surface) 0%, var(--surface-soft) 100%); }
.business-outcome {
  margin: 0 0 14px; padding: 12px 16px; border-radius: 10px;
  background: var(--blue-soft); color: var(--blue-strong);
  font-weight: 700; font-size: 14px; line-height: 1.5;
}
.business-col-results .product-tiny-grid { grid-template-columns: 1fr; gap: 10px; }
.business-col-results .primary-button { align-self: flex-start; margin-top: 18px; }

/* ── 分流矩阵（matrix-table）：可点击行 ── */
.matrix-table {
  margin-top: 44px; overflow: hidden;
  border: 1px solid var(--line); border-radius: var(--radius-lg);
  background: var(--surface);
}
.matrix-row {
  display: grid; grid-template-columns: 1.05fr 1.75fr 2.2fr 0.85fr;
  gap: 16px; align-items: center;
  padding: 18px 26px; border-top: 1px solid var(--line-soft);
  text-decoration: none;
  transition: background var(--dur) var(--ease);
}
.matrix-row-head { border-top: 0; padding: 13px 26px; background: var(--surface-soft); }
.matrix-row-head span { font-size: 12px; font-weight: 700; letter-spacing: 0.05em; text-transform: uppercase; color: var(--muted); }
.matrix-row:not(.matrix-row-head):hover { background: var(--blue-soft); }
.matrix-row > span { font-size: 14px; line-height: 1.55; color: var(--text); }
.matrix-row > span:first-child { font-weight: 700; color: var(--ink); }
.matrix-row > span:last-child { font-weight: 700; color: var(--blue-strong); text-align: right; white-space: nowrap; }

/* ── v5.2 响应式 ── */
@media (max-width: 1080px) {
  .model-step-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .model-step:nth-child(2)::after { content: none; }
  .business-line-grid { grid-template-columns: 1fr; }
  .choice-grid { grid-template-columns: 1fr; }
  .matrix-row { grid-template-columns: 1fr 1.5fr 0.8fr; }
  .matrix-row > span:nth-child(3) { display: none; }
}

@media (max-width: 720px) {
  .model-step-grid { grid-template-columns: 1fr; }
  .model-step::after { content: none; }
  .choice-card { padding: 30px 24px; }
  .choice-card h3 { font-size: 22px; }
  .business-col { padding: 22px 18px; }
  .matrix-table { border: 0; border-radius: 0; overflow: visible; background: transparent; }
  .matrix-row, .matrix-row-head {
    grid-template-columns: 1fr; gap: 6px;
    margin-bottom: 12px; padding: 16px 18px;
    border: 1px solid var(--line); border-radius: var(--radius);
    background: var(--surface);
  }
  .matrix-row-head { display: none; }
  .matrix-row:not(.matrix-row-head) { border-top: 1px solid var(--line); }
  .matrix-row > span:last-child { text-align: left; margin-top: 4px; white-space: normal; }
}