/* ============================================================
   时速GEO · EspeedGEO - 官方产品网站
   国际化企业级视觉系统 / International Enterprise Visual System
   ============================================================ */

/* ---------- Design Tokens ---------- */
:root {
  /* Color - Brand */
  --brand-50:  #EEF4FF;
  --brand-100: #DCE8FF;
  --brand-200: #B5CCFF;
  --brand-300: #8AABFF;
  --brand-400: #5C84FF;
  --brand-500: #2E5BFF;
  --brand-600: #1A40DB;
  --brand-700: #142FB0;
  --brand-800: #0F2185;
  --brand-900: #0A1757;

  /* Accent */
  --accent-400: #FFB547;
  --accent-500: #F59E0B;
  --accent-600: #D97706;

  /* Neutral */
  --ink-900: #0B1220;
  --ink-800: #111827;
  --ink-700: #1F2937;
  --ink-600: #374151;
  --ink-500: #4B5563;
  --ink-400: #6B7280;
  --ink-300: #9CA3AF;
  --ink-200: #D1D5DB;
  --ink-100: #E5E7EB;
  --ink-50:  #F3F4F6;
  --ink-25:  #F9FAFB;
  --white:   #FFFFFF;

  /* Semantic */
  --success: #10B981;
  --danger:  #EF4444;
  --warning: #F59E0B;

  /* Surface */
  --bg:        #FFFFFF;
  --bg-soft:   #F8FAFC;
  --bg-muted:  #F1F5F9;
  --border:    #E2E8F0;
  --border-strong: #CBD5E1;

  /* Type */
  --font-sans: "Inter", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  /* Radius */
  --r-xs: 4px;
  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 16px;
  --r-xl: 24px;
  --r-2xl: 32px;
  --r-pill: 999px;

  /* Shadow */
  --shadow-xs: 0 1px 2px rgba(15, 23, 42, .05);
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, .07), 0 1px 2px rgba(15, 23, 42, .04);
  --shadow-md: 0 4px 12px rgba(15, 23, 42, .08), 0 2px 4px rgba(15, 23, 42, .04);
  --shadow-lg: 0 12px 28px rgba(15, 23, 42, .10), 0 4px 8px rgba(15, 23, 42, .04);
  --shadow-xl: 0 24px 48px rgba(15, 23, 42, .12), 0 8px 16px rgba(15, 23, 42, .05);
  --shadow-glow: 0 0 0 6px rgba(46, 91, 255, .12);

  /* Layout */
  --container: 1200px;
  --container-wide: 1320px;
  --header-h: 72px;

  /* Motion */
  --ease: cubic-bezier(.2, .8, .2, 1);
  --ease-out: cubic-bezier(.16, 1, .3, 1);
  --d-fast: .18s;
  --d: .28s;
  --d-slow: .48s;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
  }
}
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink-800);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}
img, picture, video, canvas, svg { display: block; max-width: 100%; height: auto; }
input, button, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: 0; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; padding: 0; }
h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.2; color: var(--ink-900); letter-spacing: -.01em; }
p { color: var(--ink-600); }

/* Focus */
:focus-visible { outline: 2px solid var(--brand-500); outline-offset: 2px; border-radius: var(--r-sm); }

/* Skip link */
.skip-link {
  position: absolute; left: -9999px; top: 8px;
  background: var(--ink-900); color: #fff; padding: 10px 14px; border-radius: var(--r-sm);
  z-index: 9999;
}
.skip-link:focus { left: 8px; }

/* ---------- Layout ---------- */
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.container-wide { width: 100%; max-width: var(--container-wide); margin: 0 auto; padding: 0 24px; }
.section { padding: 96px 0; }
.section-sm { padding: 64px 0; }
.section-lg { padding: 128px 0; }
@media (max-width: 768px) {
  .section { padding: 64px 0; }
  .section-lg { padding: 80px 0; }
}
.grid { display: grid; gap: 24px; }
.flex { display: flex; gap: 16px; }
.text-center { text-align: center; }
.muted { color: var(--ink-500); }

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, .85);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--d) var(--ease), background var(--d) var(--ease);
}
.site-header.scrolled { border-bottom-color: var(--border); background: rgba(255, 255, 255, .94); }
.nav {
  display: flex; align-items: center; justify-content: space-between;
  height: var(--header-h);
  gap: 32px;
}
.brand {
  display: flex; align-items: center; gap: 12px;
  font-weight: 800; font-size: 24px; color: var(--ink-900);
  letter-spacing: -.025em;
}
.brand-mark {
  width: 40px; height: 40px; border-radius: 11px;
  background: linear-gradient(135deg, var(--brand-500) 0%, var(--brand-700) 100%);
  display: grid; place-items: center; color: #fff; font-weight: 800;
  box-shadow: 0 6px 18px rgba(46, 91, 255, .35);
}
.brand-name { display: flex; flex-direction: column; line-height: 1.2; gap: 4px; }
.brand-name small { font-size: 11px; font-weight: 600; color: var(--ink-400); letter-spacing: .14em; text-transform: uppercase; }

.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-link {
  position: relative;
  padding: 10px 14px;
  font-size: 15px; font-weight: 500; color: var(--ink-700);
  border-radius: var(--r-sm);
  transition: color var(--d-fast) var(--ease), background var(--d-fast) var(--ease);
}
.nav-link:hover { color: var(--brand-600); background: var(--brand-50); }
.nav-link[aria-current="page"] { color: var(--brand-600); }
.nav-link[aria-current="page"]::after {
  content: ""; position: absolute; left: 14px; right: 14px; bottom: 2px; height: 2px;
  background: var(--brand-500); border-radius: 2px;
}
.nav-cta { display: flex; align-items: center; gap: 12px; }
.lang-switch { font-size: 13px; color: var(--ink-500); }
.lang-switch a { padding: 6px 10px; border-radius: var(--r-sm); }
.lang-switch a[aria-current="true"] { background: var(--ink-900); color: #fff; }

.nav-toggle {
  display: none; width: 40px; height: 40px; border-radius: var(--r-sm);
  align-items: center; justify-content: center;
}
.nav-toggle span { display: block; width: 20px; height: 2px; background: var(--ink-800); position: relative; }
.nav-toggle span::before, .nav-toggle span::after {
  content: ""; position: absolute; left: 0; width: 20px; height: 2px; background: var(--ink-800);
}
.nav-toggle span::before { top: -6px; }
.nav-toggle span::after { top: 6px; }

@media (max-width: 960px) {
  .nav-links { display: none; }
  .nav-cta .btn { display: none; }
  .nav-toggle { display: inline-flex; }
  .nav-links.open {
    display: flex; flex-direction: column;
    position: absolute; top: var(--header-h); left: 0; right: 0;
    background: #fff; border-bottom: 1px solid var(--border);
    padding: 16px 24px; gap: 4px;
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
  }
}

/* ---------- Nav Dropdown (知识库等) ---------- */
.nav-dropdown { position: relative; }
.nav-dropdown > .nav-link {
  display: inline-flex; align-items: center; gap: 4px;
  cursor: pointer;
}
.nav-dropdown > .nav-link .caret {
  display: inline-block;
  width: 0; height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 5px solid currentColor;
  transition: transform var(--d-fast) var(--ease);
  opacity: .6;
  margin-top: 1px;
}
.nav-dropdown:hover > .nav-link .caret,
.nav-dropdown:focus-within > .nav-link .caret { transform: rotate(180deg); }
.nav-dropdown > .nav-link[aria-current="page"] { color: var(--brand-600); }

.dropdown-menu {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  min-width: 260px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-lg);
  padding: 8px;
  margin: 0;
  list-style: none;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: opacity var(--d-fast) var(--ease),
              transform var(--d-fast) var(--ease),
              visibility var(--d-fast) var(--ease);
  z-index: 60;
}
.nav-dropdown:hover .dropdown-menu,
.nav-dropdown:focus-within .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.dropdown-menu li { list-style: none; margin: 0; }
.dropdown-menu a {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 12px;
  font-size: 14px;
  font-weight: 500;
  color: var(--ink-700);
  border-radius: var(--r-sm);
  text-decoration: none;
  line-height: 1.45;
  transition: background var(--d-fast) var(--ease),
              color var(--d-fast) var(--ease);
}
.dropdown-menu a:hover,
.dropdown-menu a:focus { background: var(--brand-50); color: var(--brand-600); }
.dropdown-menu a .ico {
  flex: 0 0 auto;
  width: 28px; height: 28px;
  display: grid; place-items: center;
  background: var(--brand-50);
  border-radius: var(--r-sm);
  font-size: 15px;
}
.dropdown-menu a:hover .ico { background: var(--brand-100); }
.dropdown-menu a .txt { flex: 1 1 auto; }
.dropdown-menu a .txt b { display: block; font-weight: 600; color: var(--ink-900); }
.dropdown-menu a:hover .txt b { color: var(--brand-700); }
.dropdown-menu a .txt small { display: block; font-size: 12px; color: var(--ink-400); margin-top: 2px; font-weight: 400; }

@media (max-width: 960px) {
  .nav-dropdown > .nav-link .caret { display: none; }
  .nav-dropdown > .nav-link::after {
    content: " 知识库";
  }
  .dropdown-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    background: var(--bg-soft);
    margin: 4px 0 4px 8px;
    padding: 6px;
    min-width: 0;
  }
  .dropdown-menu a { padding: 9px 10px; }
  .dropdown-menu a .txt small { display: none; }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 22px; font-size: 15px; font-weight: 600;
  border-radius: var(--r-md); border: 1px solid transparent;
  white-space: nowrap;
  transition: transform var(--d-fast) var(--ease), background var(--d-fast) var(--ease), box-shadow var(--d-fast) var(--ease), border-color var(--d-fast) var(--ease);
}
.btn:active { transform: translateY(1px); }
.btn-primary {
  background: linear-gradient(180deg, var(--brand-500), var(--brand-600));
  color: #fff;
  box-shadow: 0 8px 20px rgba(46, 91, 255, .35);
}
.btn-primary:hover { background: linear-gradient(180deg, var(--brand-600), var(--brand-700)); }
.btn-accent {
  background: linear-gradient(180deg, var(--accent-500), var(--accent-600));
  color: #fff;
  box-shadow: 0 8px 20px rgba(245, 158, 11, .35);
}
.btn-accent:hover { filter: brightness(1.05); }
.btn-ghost {
  background: transparent; color: var(--ink-800); border-color: var(--ink-200);
}
.btn-ghost:hover { background: var(--ink-900); color: #fff; border-color: var(--ink-900); }
.btn-link { color: var(--brand-600); font-weight: 600; }
.btn-link:hover { color: var(--brand-700); }
.btn-lg { padding: 16px 28px; font-size: 16px; }
.btn-sm { padding: 8px 14px; font-size: 13px; }

/* ---------- Cards ---------- */
.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 32px;
  transition: transform var(--d) var(--ease), box-shadow var(--d) var(--ease), border-color var(--d) var(--ease);
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--ink-200); }
.card-feature { position: relative; overflow: hidden; }
.card-feature::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(600px 200px at 0% 0%, rgba(46, 91, 255, .08), transparent 60%);
  pointer-events: none;
}
.card-icon {
  width: 48px; height: 48px; border-radius: 12px;
  background: linear-gradient(135deg, var(--brand-50), var(--brand-100));
  display: grid; place-items: center; color: var(--brand-600);
  margin-bottom: 20px;
}
.card-title { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.card-desc { font-size: 14.5px; color: var(--ink-500); line-height: 1.7; }

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  padding: 120px 0 80px;
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(46, 91, 255, .12), transparent 60%),
    radial-gradient(800px 400px at 10% 100%, rgba(245, 158, 11, .10), transparent 60%),
    linear-gradient(180deg, #FAFBFF 0%, #FFFFFF 100%);
}
.hero-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 64px; align-items: center; }
@media (max-width: 960px) { .hero-grid { grid-template-columns: 1fr; gap: 48px; } }

.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 12px; border-radius: var(--r-pill);
  background: var(--brand-50); color: var(--brand-700);
  font-size: 13px; font-weight: 600; letter-spacing: .01em;
  border: 1px solid var(--brand-100);
}
.hero-eyebrow .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--brand-500); box-shadow: 0 0 0 4px rgba(46, 91, 255, .15); }

.hero h1 {
  font-size: clamp(36px, 5vw, 60px);
  line-height: 1.05; letter-spacing: -.025em;
  margin: 20px 0 20px;
}
.hero h1 .gradient {
  background: linear-gradient(120deg, var(--brand-500) 0%, #7C3AED 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-sub {
  font-size: 18px; color: var(--ink-500); line-height: 1.7;
  max-width: 560px;
}
.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.hero-trust { display: flex; flex-wrap: wrap; gap: 24px 32px; margin-top: 40px; color: var(--ink-500); font-size: 14px; }
.hero-trust strong { color: var(--ink-900); font-weight: 700; font-size: 22px; display: block; }

/* Product visual / mockup */
.product-visual {
  position: relative;
  border-radius: var(--r-xl);
  background: linear-gradient(180deg, #fff, #F8FAFC);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
}
.product-visual-bar {
  display: flex; align-items: center; gap: 6px;
  padding: 12px 16px; border-bottom: 1px solid var(--border);
  background: #fff;
}
.product-visual-bar i { width: 10px; height: 10px; border-radius: 50%; display: inline-block; }
.product-visual-bar i.r { background: #FF5F57; }
.product-visual-bar i.y { background: #FEBC2E; }
.product-visual-bar i.g { background: #28C840; }
.product-visual-bar .url {
  margin-left: 16px; font-size: 12px; color: var(--ink-400); font-family: var(--font-mono);
}
.product-visual-body { padding: 24px; min-height: 360px; position: relative; }
.pv-row { display: flex; align-items: center; justify-content: space-between; padding: 12px 14px; border-radius: 10px; background: #fff; border: 1px solid var(--border); margin-bottom: 10px; font-size: 13.5px; }
.pv-row .meta { display: flex; align-items: center; gap: 10px; color: var(--ink-700); }
.pv-row .pill { font-size: 11px; padding: 3px 8px; border-radius: var(--r-pill); font-weight: 600; }
.pv-row .pill.ok { background: #DCFCE7; color: #166534; }
.pv-row .pill.run { background: #DBEAFE; color: #1E40AF; }
.pv-row .pill.ai { background: #FEF3C7; color: #92400E; }
.pv-row .pos { color: var(--success); font-weight: 700; font-size: 12px; }
.floating-stat {
  position: absolute; right: -16px; top: 40px;
  background: #fff; border: 1px solid var(--border); border-radius: var(--r-md);
  padding: 12px 16px; box-shadow: var(--shadow-md);
  display: flex; align-items: center; gap: 12px;
  transform: translateY(0);
  animation: float 6s ease-in-out infinite;
}
.floating-stat b { color: var(--ink-900); font-size: 18px; }
.floating-stat span { font-size: 12px; color: var(--ink-500); }
.floating-stat .ico { width: 36px; height: 36px; border-radius: 8px; background: var(--brand-50); color: var(--brand-600); display: grid; place-items: center; }

.floating-stat.b { left: -16px; bottom: 40px; right: auto; animation-delay: -3s; }
.floating-stat.b .ico { background: #FEF3C7; color: #B45309; }

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

/* ---------- Sections ---------- */
.eyebrow {
  display: inline-block; font-size: 13px; font-weight: 700; letter-spacing: .14em;
  text-transform: uppercase; color: var(--brand-600);
}
.section-title {
  font-size: clamp(28px, 3.5vw, 44px);
  line-height: 1.15; letter-spacing: -.02em;
  margin: 12px 0 16px;
}
.section-sub {
  font-size: 17px; color: var(--ink-500); max-width: 720px; line-height: 1.7;
}
.section-head { text-align: center; margin-bottom: 56px; }
.section-head .section-sub { margin: 0 auto; }

/* ---------- Marquee / Logo strip ---------- */
.logos {
  padding: 48px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: #fff;
}
.logos-head { text-align: center; font-size: 13px; color: var(--ink-400); letter-spacing: .14em; text-transform: uppercase; margin-bottom: 24px; }
.logos-strip { display: flex; flex-wrap: wrap; gap: 48px; justify-content: center; align-items: center; opacity: .7; }
.logos-strip span { font-weight: 700; color: var(--ink-400); font-size: 18px; letter-spacing: .04em; }

/* ---------- Pain points ---------- */
.pain-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
@media (max-width: 900px) { .pain-grid { grid-template-columns: 1fr; } }
.pain-card { background: var(--bg-soft); border-radius: var(--r-lg); padding: 32px; border: 1px solid var(--border); }
.pain-card .num { font-family: var(--font-mono); color: var(--brand-500); font-weight: 700; font-size: 14px; }
.pain-card h3 { font-size: 20px; margin: 12px 0 10px; }
.pain-card p { color: var(--ink-500); font-size: 15px; line-height: 1.7; }

/* ---------- Feature grid ---------- */
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.feature-grid-3col { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 1100px) { .feature-grid { grid-template-columns: repeat(2, 1fr); } .feature-grid-3col { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .feature-grid { grid-template-columns: 1fr; } .feature-grid-3col { grid-template-columns: 1fr; } }

/* ---------- Process / Steps ---------- */
.steps { counter-reset: step; display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; position: relative; }
@media (max-width: 1000px) { .steps { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .steps { grid-template-columns: 1fr; } }
.step {
  background: #fff; border: 1px solid var(--border); border-radius: var(--r-lg);
  padding: 28px; position: relative;
}
.step .n {
  position: absolute; top: -14px; left: 24px;
  width: 32px; height: 32px; border-radius: 50%;
  background: var(--ink-900); color: #fff; font-weight: 700;
  display: grid; place-items: center; font-size: 14px;
}
.step h3 { font-size: 17px; margin-bottom: 8px; }
.step p { font-size: 14px; color: var(--ink-500); line-height: 1.6; }

/* ---------- Solutions tabs ---------- */
.sol-tabs { display: flex; gap: 8px; justify-content: center; margin-bottom: 32px; flex-wrap: wrap; }
.sol-tab {
  padding: 10px 18px; border-radius: var(--r-pill);
  background: #fff; border: 1px solid var(--border);
  font-weight: 600; color: var(--ink-600); font-size: 14px;
}
.sol-tab[aria-selected="true"] {
  background: var(--ink-900); color: #fff; border-color: var(--ink-900);
}
.sol-panel {
  background: #fff; border: 1px solid var(--border); border-radius: var(--r-xl);
  padding: 48px;
  display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center;
}
@media (max-width: 900px) { .sol-panel { grid-template-columns: 1fr; padding: 32px; gap: 32px; } }

/* ---------- Case study ---------- */
.cases-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
@media (max-width: 1000px) { .cases-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 700px) { .cases-grid { grid-template-columns: 1fr; } }
.case-card { background: #fff; border: 1px solid var(--border); border-radius: var(--r-lg); overflow: hidden; }
.case-cover {
  aspect-ratio: 16/9;
  background: linear-gradient(135deg, var(--brand-100), var(--brand-50));
  display: grid; place-items: center; color: var(--brand-700); font-weight: 700;
  position: relative;
}
.case-cover.alt-1 { background: linear-gradient(135deg, #FEF3C7, #FDE68A); color: #92400E; }
.case-cover.alt-2 { background: linear-gradient(135deg, #DCFCE7, #BBF7D0); color: #166534; }
.case-cover.alt-3 { background: linear-gradient(135deg, #FCE7F3, #FBCFE8); color: #9D174D; }
.case-cover.alt-4 { background: linear-gradient(135deg, #E0E7FF, #C7D2FE); color: #3730A3; }
.case-cover.alt-5 { background: linear-gradient(135deg, #FFEDD5, #FED7AA); color: #9A3412; }
.case-body { padding: 24px; }
.case-body .meta { display: flex; align-items: center; gap: 8px; font-size: 12px; color: var(--ink-400); margin-bottom: 10px; }
.case-body h3 { font-size: 18px; margin-bottom: 10px; }
.case-body p { font-size: 14px; color: var(--ink-500); line-height: 1.7; margin-bottom: 16px; }
.case-stats { display: flex; gap: 16px; padding-top: 16px; border-top: 1px solid var(--border); }
.case-stats > div b { display: block; color: var(--ink-900); font-size: 20px; font-weight: 800; }
.case-stats > div span { font-size: 12px; color: var(--ink-400); }

/* ---------- Pricing ---------- */
.pricing-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
@media (max-width: 1000px) { .pricing-grid { grid-template-columns: 1fr; } }
.plan { background: #fff; border: 1px solid var(--border); border-radius: var(--r-xl); padding: 36px; position: relative; }
.plan.featured { border-color: var(--brand-500); box-shadow: 0 24px 48px rgba(46, 91, 255, .12); transform: translateY(-4px); }
.plan .badge { position: absolute; top: -12px; left: 36px; background: var(--brand-500); color: #fff; font-size: 12px; padding: 4px 10px; border-radius: var(--r-pill); font-weight: 700; }
.plan h3 { font-size: 20px; margin-bottom: 4px; }
.plan .desc { color: var(--ink-500); font-size: 14px; margin-bottom: 24px; }
.plan .price { display: flex; align-items: baseline; gap: 4px; margin-bottom: 8px; }
.plan .price .cur { font-size: 18px; color: var(--ink-500); font-weight: 600; }
.plan .price .amt { font-size: 40px; font-weight: 800; color: var(--ink-900); letter-spacing: -.02em; }
.plan .price .per { color: var(--ink-400); font-size: 14px; }
.plan .bill { font-size: 12px; color: var(--ink-400); margin-bottom: 24px; }
.plan ul { margin: 24px 0 32px; display: grid; gap: 12px; }
.plan li { display: flex; align-items: flex-start; gap: 10px; font-size: 14.5px; color: var(--ink-700); }
.plan li::before { content: ""; flex: 0 0 18px; width: 18px; height: 18px; border-radius: 50%; background: var(--brand-50) url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%232E5BFF' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'><polyline points='20 6 9 17 4 12'/></svg>") center/12px no-repeat; margin-top: 2px; }
.plan .btn { width: 100%; }

/* ---------- FAQ ---------- */
.faq { max-width: 820px; margin: 0 auto; }
.faq details {
  background: #fff; border: 1px solid var(--border); border-radius: var(--r-md);
  margin-bottom: 12px; padding: 20px 24px; transition: border-color var(--d) var(--ease);
}
.faq details[open] { border-color: var(--brand-300); }
.faq summary {
  list-style: none; cursor: pointer;
  font-weight: 600; color: var(--ink-900); font-size: 16px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: ""; width: 14px; height: 14px;
  background: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%231F2937' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'><polyline points='6 9 12 15 18 9'/></svg>") center/contain no-repeat;
  transition: transform var(--d) var(--ease);
}
.faq details[open] summary::after { transform: rotate(180deg); }
.faq .answer { padding-top: 12px; color: var(--ink-500); line-height: 1.7; font-size: 15px; }

/* ---------- CTA Banner ---------- */
.cta-banner {
  background:
    radial-gradient(800px 300px at 0% 0%, rgba(255, 255, 255, .12), transparent 60%),
    radial-gradient(600px 200px at 100% 100%, rgba(255, 255, 255, .08), transparent 60%),
    linear-gradient(135deg, var(--brand-700) 0%, var(--brand-500) 100%);
  border-radius: var(--r-2xl);
  padding: 64px;
  color: #fff;
  text-align: center;
  position: relative; overflow: hidden;
}
.cta-banner h2 { color: #fff; font-size: clamp(28px, 3vw, 40px); margin-bottom: 12px; }
.cta-banner p { color: rgba(255, 255, 255, .85); font-size: 17px; margin-bottom: 32px; }
.cta-banner .cta-form {
  max-width: 720px; margin: 0 auto;
  background: #fff; border-radius: var(--r-lg); padding: 12px;
  display: grid; grid-template-columns: 1fr 1fr 1fr auto; gap: 8px;
  box-shadow: 0 24px 48px rgba(0, 0, 0, .15);
}
@media (max-width: 800px) { .cta-banner { padding: 40px 24px; } .cta-banner .cta-form { grid-template-columns: 1fr; } }
.cta-banner .cta-form input {
  border: 1px solid var(--border); border-radius: var(--r-md);
  padding: 12px 14px; font-size: 14px; outline: none;
  min-width: 0; width: 100%;
  transition: border-color var(--d-fast) var(--ease), box-shadow var(--d-fast) var(--ease);
}
.cta-banner .cta-form input:focus { border-color: var(--brand-500); box-shadow: 0 0 0 3px rgba(46, 91, 255, .12); }
.cta-banner .cta-form .btn { padding: 12px 22px; }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--ink-900); color: var(--ink-300);
  padding: 64px 0 24px;
  margin-top: 80px;
}
.footer-grid { display: grid; grid-template-columns: 1.4fr repeat(4, 1fr); gap: 32px; }
@media (max-width: 1000px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 600px) { .footer-grid { grid-template-columns: 1fr; } }
.site-footer h4 { color: #fff; font-size: 14px; font-weight: 700; letter-spacing: .04em; text-transform: uppercase; margin-bottom: 16px; }
.site-footer a { color: var(--ink-300); font-size: 14px; transition: color var(--d-fast) var(--ease); display: inline-block; padding: 4px 0; }
.site-footer a:hover { color: #fff; }
.footer-brand p { font-size: 14px; line-height: 1.7; margin: 12px 0 16px; color: var(--ink-400); }
.footer-bottom {
  border-top: 1px solid #1F2937; margin-top: 48px; padding-top: 24px;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 16px;
  font-size: 13px; color: var(--ink-500);
}
.footer-bottom .legal { display: flex; gap: 16px; flex-wrap: wrap; }
.footer-bottom .legal a { padding: 0; }
/* Footer 链接列垂直堆叠（修复 inline-block 横向流排导致换行混乱） */
.footer-grid > div:not(.footer-brand) a { display: block; }
.footer-grid > div:not(.footer-brand) { display: flex; flex-direction: column; }
.footer-copy { display: flex; flex-direction: column; gap: 4px; }
.footer-license { font-size: 12px; color: var(--ink-500); }

/* ---------- Page header (subpages) ---------- */
.page-header {
  padding: 140px 0 60px;
  background: linear-gradient(180deg, #F8FAFF 0%, #FFFFFF 100%);
  text-align: center;
  border-bottom: 1px solid var(--border);
}
.page-header .breadcrumb { font-size: 13px; color: var(--ink-400); margin-bottom: 16px; }
.page-header .breadcrumb a { color: var(--ink-500); }
.page-header .breadcrumb a:hover { color: var(--brand-600); }
.page-header h1 { font-size: clamp(32px, 4vw, 52px); line-height: 1.1; }
.page-header p { font-size: 18px; color: var(--ink-500); max-width: 720px; margin: 16px auto 0; }

/* ---------- Stats strip ---------- */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; padding: 48px 0; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
@media (max-width: 800px) { .stats { grid-template-columns: repeat(2, 1fr); } }
.stat { text-align: center; }
.stat b { display: block; font-size: 40px; font-weight: 800; color: var(--ink-900); letter-spacing: -.02em; line-height: 1; }
.stat b small { font-size: 18px; color: var(--brand-500); font-weight: 700; }
.stat span { font-size: 13px; color: var(--ink-500); margin-top: 8px; display: block; }

/* ---------- Comparison table ---------- */
.compare { width: 100%; border-collapse: separate; border-spacing: 0; background: #fff; border-radius: var(--r-lg); overflow: hidden; border: 1px solid var(--border); }
.compare th, .compare td { padding: 16px 20px; text-align: left; font-size: 14.5px; border-bottom: 1px solid var(--border); }
.compare th { background: var(--bg-soft); color: var(--ink-700); font-weight: 700; }
.compare td.y { color: var(--success); font-weight: 700; }
.compare td.n { color: var(--ink-300); }
.compare tr:last-child td { border-bottom: 0; }
.compare .us { background: var(--brand-50); font-weight: 700; color: var(--ink-900); }

/* ---------- Utility ---------- */
.mt-0 { margin-top: 0; } .mt-1 { margin-top: 8px; } .mt-2 { margin-top: 16px; } .mt-3 { margin-top: 24px; } .mt-4 { margin-top: 32px; } .mt-5 { margin-top: 48px; }
.mb-0 { margin-bottom: 0; } .mb-1 { margin-bottom: 8px; } .mb-2 { margin-bottom: 16px; } .mb-3 { margin-bottom: 24px; } .mb-4 { margin-bottom: 32px; } .mb-5 { margin-bottom: 48px; }
.gap-1 { gap: 8px; } .gap-2 { gap: 16px; } .gap-3 { gap: 24px; } .gap-4 { gap: 32px; }
.flex-wrap { flex-wrap: wrap; } .items-center { align-items: center; } .justify-center { justify-content: center; } .justify-between { justify-content: space-between; }
.hidden-mobile { display: initial; }
@media (max-width: 700px) { .hidden-mobile { display: none; } }

/* ---------- Animations on scroll ---------- */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .8s var(--ease-out), transform .8s var(--ease-out); }
.reveal.in { opacity: 1; transform: none; }
.hero-b2b .reveal { opacity: 1; transform: none; animation: hero-rise .9s var(--ease-out) both; }
@keyframes hero-rise {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: none; }
}
.hero-mega .reveal:nth-child(1) { transition-delay: .1s; }
.hero-mega .reveal:nth-child(2) { transition-delay: .25s; }
.page-header-v2 .reveal { transition-delay: .1s; }

/* ============================================================
   HERO V2 · 增强版首屏
   ============================================================ */

/* Mesh gradient background */
.hero-mega {
  position: relative; overflow: hidden;
  padding: 140px 0 100px;
  background:
    radial-gradient(900px 500px at 85% 10%, rgba(46, 91, 255, .18), transparent 60%),
    radial-gradient(700px 400px at 5% 90%, rgba(245, 158, 11, .14), transparent 60%),
    radial-gradient(600px 350px at 50% 50%, rgba(124, 58, 237, .10), transparent 70%),
    linear-gradient(180deg, #F4F7FF 0%, #FFFFFF 60%);
  isolation: isolate;
}
.hero-mega::before, .hero-mega::after {
  content: ""; position: absolute; border-radius: 50%; filter: blur(80px); opacity: .55; z-index: -1; pointer-events: none;
}
.hero-mega::before { width: 480px; height: 480px; top: -120px; right: -80px; background: radial-gradient(circle, #5C84FF, transparent 70%); animation: blob 18s ease-in-out infinite; }
.hero-mega::after  { width: 380px; height: 380px; bottom: -120px; left: -60px; background: radial-gradient(circle, #FFB547, transparent 70%); animation: blob 22s ease-in-out -8s infinite reverse; }

@keyframes blob {
  0%, 100% { transform: translate(0,0) scale(1); }
  33%      { transform: translate(40px,-30px) scale(1.05); }
  66%      { transform: translate(-30px,40px) scale(.95); }
}

.hero-mega-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 72px; align-items: center; position: relative; }
@media (max-width: 1024px) { .hero-mega-grid { grid-template-columns: 1fr; gap: 56px; } }

/* Hero h1 ultra */
.hero-mega h1 { font-size: clamp(40px, 5.4vw, 68px); line-height: 1.04; letter-spacing: -.03em; margin: 20px 0 20px; }
.hero-mega h1 .grad {
  background: linear-gradient(120deg, #2E5BFF 0%, #7C3AED 50%, #EC4899 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  background-size: 200% 200%;
  animation: grad-shift 8s ease-in-out infinite;
}
@keyframes grad-shift {
  0%, 100% { background-position: 0% 50%; }
  50%      { background-position: 100% 50%; }
}
.hero-mega .hero-sub { font-size: 19px; color: var(--ink-500); line-height: 1.7; max-width: 580px; }

.hero-rating { display: flex; align-items: center; gap: 16px; margin-top: 24px; flex-wrap: wrap; }
.hero-rating .stars { color: #F59E0B; letter-spacing: 2px; font-size: 16px; }
.hero-rating small { color: var(--ink-400); font-size: 13px; }
.hero-rating .sep { color: var(--ink-200); }

.hero-cta-group { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 32px; }
.hero-cta-meta { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--ink-400); margin-top: 14px; }
.hero-cta-meta::before { content: "✓"; color: var(--success); font-weight: 700; }

/* Trust stat strip */
.trust-strip {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 0;
  margin-top: 56px;
  background: rgba(255,255,255,.7);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,.8);
  border-radius: var(--r-lg);
  box-shadow: 0 12px 40px rgba(15, 23, 42, .06);
  overflow: hidden;
}
@media (max-width: 700px) { .trust-strip { grid-template-columns: repeat(2, 1fr); } }
.trust-strip > div { padding: 24px 20px; text-align: center; border-right: 1px solid var(--border); }
.trust-strip > div:last-child { border-right: 0; }
@media (max-width: 700px) {
  .trust-strip > div:nth-child(2) { border-right: 0; }
  .trust-strip > div:nth-child(1), .trust-strip > div:nth-child(2) { border-bottom: 1px solid var(--border); }
}
.trust-strip b { display: block; font-size: 30px; font-weight: 800; color: var(--ink-900); letter-spacing: -.02em; line-height: 1; }
.trust-strip b small { font-size: 16px; color: var(--brand-500); font-weight: 700; }
.trust-strip span { display: block; font-size: 12.5px; color: var(--ink-500); margin-top: 6px; }

/* Hero visual cluster (homepage) */
.hero-visual-cluster { position: relative; height: 540px; }
@media (max-width: 1024px) { .hero-visual-cluster { height: 480px; } }

.hvc-main {
  position: absolute; inset: 40px 20px 40px 0;
  background: linear-gradient(180deg, #fff, #F8FAFC);
  border-radius: var(--r-xl);
  border: 1px solid var(--border);
  box-shadow: 0 30px 60px -20px rgba(15, 23, 42, .18), 0 12px 24px -8px rgba(15, 23, 42, .08);
  overflow: hidden;
  transform: perspective(1200px) rotateY(-3deg) rotateX(1deg);
  transition: transform .6s var(--ease);
}
.hvc-main:hover { transform: perspective(1200px) rotateY(0deg) rotateX(0deg); }

.hvc-bar { display: flex; align-items: center; gap: 6px; padding: 12px 16px; border-bottom: 1px solid var(--border); background: #fff; }
.hvc-bar i { width: 10px; height: 10px; border-radius: 50%; display: inline-block; }
.hvc-bar i.r { background: #FF5F57; } .hvc-bar i.y { background: #FEBC2E; } .hvc-bar i.g { background: #28C840; }
.hvc-bar .url { margin-left: 16px; font-size: 12px; color: var(--ink-400); font-family: var(--font-mono); }
.hvc-bar .live { margin-left: auto; display: flex; align-items: center; gap: 6px; font-size: 11px; color: var(--success); font-weight: 600; }
.hvc-bar .live .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--success); animation: pulse 1.5s ease-in-out infinite; }
@keyframes pulse { 0%, 100% { opacity: 1; transform: scale(1); } 50% { opacity: .5; transform: scale(1.3); } }

.hvc-body { padding: 20px; }
.hvc-section-title { font-size: 11px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-400); margin-bottom: 10px; display: flex; align-items: center; gap: 6px; }

.hvc-rank { display: grid; gap: 8px; margin-bottom: 18px; }
.hvc-rank .row {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 14px; background: #fff; border: 1px solid var(--border); border-radius: 10px;
  font-size: 13.5px;
}
.hvc-rank .row .k { display: flex; align-items: center; gap: 10px; color: var(--ink-700); }
.hvc-rank .row .flag { font-size: 18px; }
.hvc-rank .pill { font-size: 10.5px; padding: 3px 8px; border-radius: var(--r-pill); font-weight: 700; }
.hvc-rank .pill.top { background: #DCFCE7; color: #166534; }
.hvc-rank .pill.rise { background: #FEF3C7; color: #92400E; }
.hvc-rank .pos { color: var(--success); font-weight: 700; font-size: 12px; }

.hvc-mini-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.hvc-mini {
  padding: 14px; background: #fff; border: 1px solid var(--border); border-radius: 10px;
  display: flex; flex-direction: column; gap: 4px;
}
.hvc-mini .label { font-size: 11px; color: var(--ink-400); text-transform: uppercase; letter-spacing: .08em; }
.hvc-mini .val { font-size: 22px; font-weight: 800; color: var(--ink-900); letter-spacing: -.02em; }
.hvc-mini .val small { font-size: 12px; color: var(--success); font-weight: 700; }
.hvc-mini .delta { font-size: 11.5px; color: var(--success); font-weight: 600; }

/* Floating cards around the main visual */
.hvc-card {
  position: absolute;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  box-shadow: 0 16px 32px -8px rgba(15, 23, 42, .15), 0 4px 8px -2px rgba(15, 23, 42, .05);
  padding: 14px 16px;
  display: flex; align-items: center; gap: 12px;
  animation: float-y 6s ease-in-out infinite;
  z-index: 2;
}
.hvc-card .ico { width: 36px; height: 36px; border-radius: 10px; display: grid; place-items: center; font-size: 18px; flex-shrink: 0; }
.hvc-card .num b { display: block; font-size: 17px; font-weight: 800; color: var(--ink-900); line-height: 1.1; }
.hvc-card .num span { font-size: 11.5px; color: var(--ink-500); }

.hvc-card.c1 { top: -10px; right: 10px; animation-delay: 0s; }
.hvc-card.c1 .ico { background: linear-gradient(135deg, #DBEAFE, #93C5FD); }
.hvc-card.c2 { top: 38%; left: -30px; animation-delay: -2s; }
.hvc-card.c2 .ico { background: linear-gradient(135deg, #FEF3C7, #FCD34D); }
.hvc-card.c3 { bottom: 30px; right: -20px; animation-delay: -4s; }
.hvc-card.c3 .ico { background: linear-gradient(135deg, #DCFCE7, #86EFAC); }
.hvc-card.c4 { top: 18%; right: -20px; padding: 10px 14px; animation-delay: -3s; }
.hvc-card.c4 .ico { background: linear-gradient(135deg, #FCE7F3, #F9A8D4); }

@keyframes float-y {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-10px); }
}

/* Live activity ticker */
.ticker {
  margin-top: 56px;
  background: rgba(11, 18, 32, .95);
  border-radius: var(--r-lg);
  padding: 14px 20px;
  display: flex; align-items: center; gap: 16px;
  color: #fff; font-size: 13px;
  overflow: hidden;
  position: relative;
}
.ticker::before, .ticker::after {
  content: ""; position: absolute; top: 0; bottom: 0; width: 60px; z-index: 2; pointer-events: none;
}
.ticker::before { left: 0; background: linear-gradient(90deg, rgba(11,18,32,.95), transparent); }
.ticker::after  { right: 0; background: linear-gradient(-90deg, rgba(11,18,32,.95), transparent); }
.ticker .label {
  display: flex; align-items: center; gap: 8px;
  background: var(--brand-500); color: #fff; padding: 4px 12px; border-radius: var(--r-pill);
  font-size: 11px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; flex-shrink: 0;
}
.ticker .label .dot { width: 6px; height: 6px; border-radius: 50%; background: #fff; animation: pulse 1.5s ease-in-out infinite; }
.ticker .track { display: flex; gap: 48px; white-space: nowrap; animation: ticker-scroll 40s linear infinite; }
.ticker .item { display: inline-flex; align-items: center; gap: 8px; color: #D1D5DB; }
.ticker .item b { color: #fff; font-weight: 700; }
.ticker .item .ok { color: #34D399; }
@keyframes ticker-scroll {
  0%   { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* Customer logo strip */
.logo-strip {
  margin-top: 64px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}
.logo-strip .label { text-align: center; font-size: 12px; color: var(--ink-400); letter-spacing: .16em; text-transform: uppercase; margin-bottom: 24px; }
.logo-strip .logos { display: flex; flex-wrap: wrap; gap: 48px; justify-content: center; align-items: center; }
.logo-strip .logo {
  font-weight: 800; color: var(--ink-400); font-size: 18px; letter-spacing: .04em;
  display: flex; align-items: center; gap: 8px;
  transition: color var(--d-fast) var(--ease);
}
.logo-strip .logo:hover { color: var(--ink-700); }
.logo-strip .logo::before { content: ""; width: 28px; height: 28px; border-radius: 6px; background: linear-gradient(135deg, var(--ink-100), var(--ink-50)); border: 1px solid var(--border); }
.logo-strip .logo.l1::before { background: linear-gradient(135deg, #1E40AF, #3B82F6); border: 0; }
.logo-strip .logo.l2::before { background: linear-gradient(135deg, #047857, #10B981); border: 0; }
.logo-strip .logo.l3::before { background: linear-gradient(135deg, #B91C1C, #EF4444); border: 0; }
.logo-strip .logo.l4::before { background: linear-gradient(135deg, #6D28D9, #8B5CF6); border: 0; }
.logo-strip .logo.l5::before { background: linear-gradient(135deg, #B45309, #F59E0B); border: 0; }
.logo-strip .logo.l6::before { background: linear-gradient(135deg, #0E7490, #06B6D4); border: 0; }

/* ============================================================
   HERO V2 · Subpage page-header enhancements
   ============================================================ */

.page-header-v2 {
  position: relative; overflow: hidden;
  padding: 160px 0 80px;
  background:
    radial-gradient(700px 400px at 90% 0%, rgba(46, 91, 255, .15), transparent 60%),
    radial-gradient(500px 300px at 0% 100%, rgba(245, 158, 11, .12), transparent 60%),
    linear-gradient(180deg, #F4F7FF 0%, #FFFFFF 100%);
  text-align: center;
  border-bottom: 1px solid var(--border);
  isolation: isolate;
}
.page-header-v2::before {
  content: ""; position: absolute; top: -200px; right: -100px; width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(124, 58, 237, .15), transparent 70%);
  border-radius: 50%; filter: blur(40px); z-index: -1; pointer-events: none;
}
.page-header-v2 .breadcrumb { font-size: 13px; color: var(--ink-400); margin-bottom: 20px; }
.page-header-v2 .breadcrumb a { color: var(--ink-500); }
.page-header-v2 .breadcrumb a:hover { color: var(--brand-600); }
.page-header-v2 h1 { font-size: clamp(36px, 4.5vw, 60px); line-height: 1.06; letter-spacing: -.025em; }
.page-header-v2 h1 .grad {
  background: linear-gradient(120deg, #2E5BFF, #7C3AED);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.page-header-v2 p { font-size: 19px; color: var(--ink-500); max-width: 720px; margin: 18px auto 0; line-height: 1.7; }

.page-header-v2 .badges {
  display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; margin-top: 28px;
}
.page-header-v2 .badge-item {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(255, 255, 255, .7);
  border: 1px solid var(--border);
  padding: 8px 14px;
  border-radius: var(--r-pill);
  font-size: 13px; color: var(--ink-700); font-weight: 500;
  backdrop-filter: blur(8px);
}
.page-header-v2 .badge-item .ico { font-size: 14px; }

/* Featured cluster for product hero */
.feature-cluster {
  display: grid; grid-template-columns: repeat(6, 1fr); gap: 12px;
  margin-top: 56px; padding: 0;
}
@media (max-width: 900px) { .feature-cluster { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 500px) { .feature-cluster { grid-template-columns: repeat(2, 1fr); } }
.fc-item {
  background: rgba(255, 255, 255, .8);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 18px 14px;
  text-align: center;
  backdrop-filter: blur(8px);
  transition: transform var(--d) var(--ease), box-shadow var(--d) var(--ease);
}
.fc-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.fc-item .ico {
  width: 44px; height: 44px; border-radius: 12px;
  background: linear-gradient(135deg, var(--brand-50), var(--brand-100));
  color: var(--brand-600);
  display: grid; place-items: center; margin: 0 auto 10px;
  font-size: 20px;
}
.fc-item .name { font-size: 13px; font-weight: 700; color: var(--ink-800); }

/* Solution cards hero */
.sol-cards {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px;
  margin-top: 56px;
}
@media (max-width: 900px) { .sol-cards { grid-template-columns: 1fr; } }
.sol-card-hero {
  background: rgba(255, 255, 255, .85);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 24px;
  text-align: left;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(8px);
  transition: transform var(--d) var(--ease), box-shadow var(--d) var(--ease);
}
.sol-card-hero::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px;
}
.sol-card-hero.s1::before { background: linear-gradient(90deg, #3B82F6, #06B6D4); }
.sol-card-hero.s2::before { background: linear-gradient(90deg, #F59E0B, #EF4444); }
.sol-card-hero.s3::before { background: linear-gradient(90deg, #8B5CF6, #EC4899); }
.sol-card-hero:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.sol-card-hero .ico {
  width: 48px; height: 48px; border-radius: 12px;
  display: grid; place-items: center; font-size: 24px; margin-bottom: 14px;
}
.sol-card-hero.s1 .ico { background: linear-gradient(135deg, #DBEAFE, #93C5FD); }
.sol-card-hero.s2 .ico { background: linear-gradient(135deg, #FEF3C7, #FCD34D); }
.sol-card-hero.s3 .ico { background: linear-gradient(135deg, #EDE9FE, #C4B5FD); }
.sol-card-hero h3 { font-size: 18px; margin-bottom: 8px; }
.sol-card-hero p { font-size: 13.5px; color: var(--ink-500); line-height: 1.6; margin-bottom: 14px; }
.sol-card-hero .meta { display: flex; gap: 8px; font-size: 11.5px; color: var(--ink-400); }
.sol-card-hero .meta span { padding: 2px 8px; background: var(--ink-50); border-radius: var(--r-pill); }

/* Case metric showcase */
.metric-showcase {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 0;
  margin-top: 56px;
  background: rgba(255,255,255,.7);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  box-shadow: 0 12px 40px rgba(15, 23, 42, .06);
  overflow: hidden;
}
@media (max-width: 800px) { .metric-showcase { grid-template-columns: repeat(2, 1fr); } }
.metric-showcase > div { padding: 32px 20px; text-align: center; border-right: 1px solid var(--border); position: relative; }
.metric-showcase > div:last-child { border-right: 0; }
@media (max-width: 800px) {
  .metric-showcase > div:nth-child(2) { border-right: 0; }
  .metric-showcase > div:nth-child(1), .metric-showcase > div:nth-child(2) { border-bottom: 1px solid var(--border); }
}
.metric-showcase .num { font-size: 44px; font-weight: 800; letter-spacing: -.03em; line-height: 1; background: linear-gradient(120deg, var(--brand-500), #7C3AED); -webkit-background-clip: text; background-clip: text; color: transparent; }
.metric-showcase .num small { font-size: 20px; }
.metric-showcase .lbl { font-size: 13px; color: var(--ink-500); margin-top: 8px; display: block; }
.metric-showcase .trend { font-size: 11px; color: var(--success); font-weight: 700; margin-top: 6px; }

/* Featured case highlight */
.featured-case {
  display: grid; grid-template-columns: 1.4fr 1fr; gap: 32px;
  margin-top: 56px;
  background: rgba(255,255,255,.85);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  padding: 32px;
  text-align: left;
  box-shadow: 0 16px 40px rgba(15, 23, 42, .08);
}
@media (max-width: 800px) { .featured-case { grid-template-columns: 1fr; padding: 24px; } }
.featured-case .label { font-size: 11px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; color: var(--brand-500); margin-bottom: 8px; }
.featured-case h3 { font-size: 22px; margin-bottom: 8px; }
.featured-case p { color: var(--ink-500); font-size: 14.5px; line-height: 1.7; margin-bottom: 16px; }
.featured-case .mini-stats { display: flex; gap: 20px; }
.featured-case .mini-stats b { display: block; font-size: 24px; font-weight: 800; color: var(--ink-900); }
.featured-case .mini-stats span { font-size: 12px; color: var(--ink-400); }
.featured-case .visual {
  background: linear-gradient(135deg, var(--brand-50), var(--brand-100));
  border-radius: var(--r-lg); padding: 24px; display: flex; flex-direction: column; justify-content: center;
  position: relative; overflow: hidden;
}
.featured-case .visual::before { content: "📈"; position: absolute; top: -20px; right: -20px; font-size: 140px; opacity: .15; }

/* Pricing ROI teaser */
.roi-strip {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px;
  margin-top: 56px;
}
@media (max-width: 800px) { .roi-strip { grid-template-columns: 1fr; } }
.roi-item {
  background: rgba(255, 255, 255, .85);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 20px 24px;
  display: flex; align-items: center; gap: 16px;
}
.roi-item .ico { width: 48px; height: 48px; border-radius: 12px; background: linear-gradient(135deg, var(--brand-50), var(--brand-100)); color: var(--brand-600); display: grid; place-items: center; font-size: 22px; flex-shrink: 0; }
.roi-item .body b { display: block; font-size: 15px; color: var(--ink-900); margin-bottom: 2px; }
.roi-item .body span { font-size: 13px; color: var(--ink-500); }

/* About hero enhancements */
.team-strip {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px;
  margin-top: 56px;
}
@media (max-width: 700px) { .team-strip { grid-template-columns: repeat(2, 1fr); } }
.team-avatar {
  aspect-ratio: 1; border-radius: var(--r-lg);
  background: linear-gradient(135deg, var(--brand-100), var(--brand-50));
  display: grid; place-items: center; font-size: 48px; font-weight: 800; color: var(--brand-700);
  position: relative; overflow: hidden;
  transition: transform var(--d) var(--ease);
}
.team-avatar:hover { transform: scale(1.04); }
.team-avatar.a2 { background: linear-gradient(135deg, #FEF3C7, #FDE68A); color: #92400E; }
.team-avatar.a3 { background: linear-gradient(135deg, #DCFCE7, #BBF7D0); color: #166534; }
.team-avatar.a4 { background: linear-gradient(135deg, #FCE7F3, #FBCFE8); color: #9D174D; }
.team-avatar .lbl { position: absolute; bottom: 12px; left: 12px; right: 12px; background: rgba(255,255,255,.92); padding: 6px 10px; border-radius: 8px; font-size: 11px; color: var(--ink-700); text-align: center; font-weight: 600; }

/* Contact hero enhancements */
.contact-channels {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px;
  margin-top: 48px;
}
@media (max-width: 800px) { .contact-channels { grid-template-columns: 1fr; } }
.cc-item {
  background: rgba(255, 255, 255, .85);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 20px;
  display: flex; align-items: center; gap: 14px;
  transition: transform var(--d) var(--ease), box-shadow var(--d) var(--ease);
}
.cc-item:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.cc-item .ico { width: 44px; height: 44px; border-radius: 10px; background: var(--brand-50); color: var(--brand-600); display: grid; place-items: center; font-size: 20px; flex-shrink: 0; }
.cc-item .body b { display: block; font-size: 14px; color: var(--ink-900); margin-bottom: 2px; }
.cc-item .body span { font-size: 12.5px; color: var(--ink-500); }

/* Guarantee badge */
.guarantee-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: linear-gradient(135deg, #FEF3C7, #FDE68A);
  border: 1px solid #F59E0B;
  color: #92400E;
  padding: 8px 16px;
  border-radius: var(--r-pill);
  font-size: 13px; font-weight: 700;
  margin-top: 20px;
}

/* Section header v2 */
.sh-v2 { text-align: center; margin-bottom: 56px; }
.sh-v2 .eyebrow { display: inline-block; }
.sh-v2 h2 { font-size: clamp(28px, 3.5vw, 44px); line-height: 1.15; letter-spacing: -.02em; margin: 12px 0 16px; }
.sh-v2 p { font-size: 17px; color: var(--ink-500); max-width: 720px; line-height: 1.7; margin: 0 auto; }

/* ============================================================
   HERO V3 · 宝林云风格·超大字 + 大数据
   ============================================================ */

.hero-b2b {
  position: relative; overflow: hidden;
  padding: 60px 0 0;
  background:
    radial-gradient(1200px 600px at 50% 0%, rgba(46, 91, 255, .15), transparent 60%),
    radial-gradient(800px 400px at 10% 100%, rgba(124, 58, 237, .10), transparent 60%),
    radial-gradient(700px 350px at 90% 100%, rgba(245, 158, 11, .08), transparent 60%),
    linear-gradient(180deg, #F4F7FF 0%, #FFFFFF 70%);
  isolation: isolate;
  text-align: center;
}
.hero-b2b::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(46, 91, 255, .04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(46, 91, 255, .04) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 50% at 50% 20%, #000 20%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse 80% 50% at 50% 20%, #000 20%, transparent 70%);
  z-index: -1; pointer-events: none;
}
.hero-b2b::after {
  content: ""; position: absolute;
  top: -150px; left: 50%; transform: translateX(-50%);
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(46, 91, 255, .20), transparent 60%);
  filter: blur(80px); z-index: -1; pointer-events: none;
}

.hero-b2b .eyebrow-tag {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 18px;
  background: rgba(255, 255, 255, .85);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  font-size: 13.5px; color: var(--ink-700); font-weight: 500;
  margin-bottom: 24px;
  box-shadow: 0 2px 8px rgba(15, 23, 42, .04);
}
.hero-b2b .eyebrow-tag .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--success); }

.hero-b2b h1 {
  font-size: clamp(36px, 4.8vw, 60px);
  line-height: 1.1;
  letter-spacing: -.03em;
  font-weight: 800;
  margin: 0 auto 16px;
  max-width: 1000px;
}
.hero-b2b h1 .grad {
  background: linear-gradient(120deg, #2E5BFF 0%, #7C3AED 50%, #EC4899 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  background-size: 200% 200%;
  animation: grad-shift 8s ease-in-out infinite;
  display: inline-block;
  white-space: nowrap;
  font-size: 0.85em;
}
.hero-b2b h1 .grad-blue {
  background: linear-gradient(120deg, #1A40DB, #2E5BFF);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  display: inline-block;
}
.hero-b2b .hero-sub {
  font-size: 17px; color: var(--ink-500); line-height: 1.65;
  max-width: 880px; margin: 0 auto 28px;
}
.hero-b2b .hero-sub b { color: var(--ink-800); font-weight: 600; }

.hero-b2b .cta-row {
  display: inline-flex; flex-wrap: wrap; gap: 12px; justify-content: center;
  margin-bottom: 14px;
}
.hero-b2b .cta-meta {
  font-size: 13px; color: var(--ink-400); margin-bottom: 36px;
}
.hero-b2b .cta-meta::before { content: "✓ "; color: var(--success); font-weight: 700; }

/* Partner strip */
.partner-strip {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 22px 0;
  background: rgba(255, 255, 255, .6);
  backdrop-filter: blur(8px);
}
.partner-strip .label { text-align: center; font-size: 12.5px; color: var(--ink-500); letter-spacing: .12em; text-transform: uppercase; margin-bottom: 16px; }
.partner-strip .partners { display: flex; flex-wrap: wrap; gap: 56px; justify-content: center; align-items: center; }
.partner-strip .partners .p {
  display: flex; align-items: center; gap: 10px;
  font-weight: 800; color: var(--ink-500); font-size: 16px;
  letter-spacing: .04em; transition: color var(--d-fast) var(--ease);
}
.partner-strip .partners .p:hover { color: var(--ink-800); }
.partner-strip .partners .p .ic {
  width: 32px; height: 32px; border-radius: 8px;
  background: linear-gradient(135deg, var(--ink-100), var(--ink-50));
  border: 1px solid var(--border);
  display: grid; place-items: center; font-size: 16px;
}
.partner-strip .partners .p.p1 .ic { background: linear-gradient(135deg, #FF6A00, #FF9D00); border: 0; color: #fff; }
.partner-strip .partners .p.p2 .ic { background: linear-gradient(135deg, #C7000B, #E60012); border: 0; color: #fff; }
.partner-strip .partners .p.p3 .ic { background: linear-gradient(135deg, #00C853, #00E676); border: 0; color: #fff; }
.partner-strip .partners .p.p4 .ic { background: linear-gradient(135deg, #2932E1, #4F6BFF); border: 0; color: #fff; }
.partner-strip .partners .p.p5 .ic { background: linear-gradient(135deg, #06ADEB, #00C6FF); border: 0; color: #fff; }
.partner-strip .partners .p.p6 .ic { background: linear-gradient(135deg, #6366F1, #818CF8); border: 0; color: #fff; }

/* Mega stats - 4 huge numbers */
.mega-stats {
  padding: 32px 0 56px;
  position: relative;
}
.mega-stats .container-wide { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; }
@media (max-width: 900px) { .mega-stats .container-wide { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 540px) { .mega-stats .container-wide { grid-template-columns: 1fr; } }
.mega-stat {
  text-align: center; padding: 16px 20px 20px;
  position: relative;
}
.mega-stat:not(:last-child)::after {
  content: ""; position: absolute; right: 0; top: 20%; bottom: 20%;
  width: 1px; background: var(--border);
}
@media (max-width: 900px) {
  .mega-stat:nth-child(2)::after { display: none; }
  .mega-stat:not(:last-child)::after { display: none; }
  .mega-stat { border-bottom: 1px solid var(--border); padding-bottom: 28px; margin-bottom: 8px; }
  .mega-stat:nth-last-child(-n+2) { border-bottom: 0; padding-bottom: 20px; margin-bottom: 0; }
}
.mega-stat .ico {
  width: 52px; height: 52px; border-radius: 14px;
  display: grid; place-items: center; font-size: 24px;
  margin: 0 auto 14px;
}
.mega-stat:nth-child(1) .ico { background: linear-gradient(135deg, #DBEAFE, #93C5FD); }
.mega-stat:nth-child(2) .ico { background: linear-gradient(135deg, #FEF3C7, #FCD34D); }
.mega-stat:nth-child(3) .ico { background: linear-gradient(135deg, #DCFCE7, #86EFAC); }
.mega-stat:nth-child(4) .ico { background: linear-gradient(135deg, #FCE7F3, #F9A8D4); }
.mega-stat .num {
  font-size: clamp(40px, 5vw, 60px);
  font-weight: 800; line-height: 1; letter-spacing: -.035em;
  background: linear-gradient(135deg, #0F2185 0%, #2E5BFF 60%, #7C3AED 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  margin-bottom: 8px;
  display: inline-block;
}
.mega-stat .num small { font-size: .5em; color: #2E5BFF; -webkit-text-fill-color: #2E5BFF; margin-left: 2px; }
.mega-stat .lbl { font-size: 14.5px; color: var(--ink-700); font-weight: 600; }
.mega-stat .sub { font-size: 12px; color: var(--ink-400); margin-top: 4px; }

/* Subpage page-header ultra */
.page-header-b2b {
  position: relative; overflow: hidden;
  padding: 80px 0 56px;
  background:
    radial-gradient(800px 400px at 50% 0%, rgba(46, 91, 255, .15), transparent 60%),
    linear-gradient(180deg, #F4F7FF 0%, #FFFFFF 100%);
  text-align: center;
  border-bottom: 1px solid var(--border);
  isolation: isolate;
}
.page-header-b2b::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(46, 91, 255, .04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(46, 91, 255, .04) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, #000 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, #000 30%, transparent 70%);
  z-index: -1; pointer-events: none;
}
.page-header-b2b .breadcrumb { font-size: 13px; color: var(--ink-400); margin-bottom: 18px; }
.page-header-b2b .breadcrumb a { color: var(--ink-500); }
.page-header-b2b .breadcrumb a:hover { color: var(--brand-600); }
.page-header-b2b .eyebrow-tag { margin-bottom: 22px; }
.page-header-b2b h1 {
  font-size: clamp(32px, 4.2vw, 52px);
  line-height: 1.12; letter-spacing: -.03em; font-weight: 800;
  margin: 0 auto 16px; max-width: 900px;
}
.page-header-b2b h1 .grad {
  background: linear-gradient(120deg, #2E5BFF 0%, #7C3AED 50%, #EC4899 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  background-size: 200% 200%; animation: grad-shift 8s ease-in-out infinite;
  display: inline-block;
}
.page-header-b2b p { font-size: 17px; color: var(--ink-500); max-width: 720px; margin: 0 auto 28px; line-height: 1.7; }

.page-header-b2b .badges {
  display: flex; flex-wrap: wrap; gap: 10px; justify-content: center;
}
.page-header-b2b .badge-item {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(255, 255, 255, .8);
  border: 1px solid var(--border);
  padding: 7px 14px;
  border-radius: var(--r-pill);
  font-size: 13px; color: var(--ink-700); font-weight: 500;
  backdrop-filter: blur(8px);
  transition: transform var(--d-fast) var(--ease), border-color var(--d-fast) var(--ease);
}
.page-header-b2b .badge-item:hover { transform: translateY(-1px); border-color: var(--brand-300); }
.page-header-b2b .badge-item .ico { font-size: 14px; }

/* ============================================================
   V4 · 排版细节优化 / Typography Refinement
   参考 baolinyun.com · 中英文混排 / 阅读体验
   ============================================================ */

/* 中英文混排优化：自动西文间距、标点挤压 */
body {
  font-feature-settings: "kern" 1, "liga" 1, "calt" 1, "tnum" 0;
  font-variant-east-asian: proportional-width;
  text-spacing-trim: space-all; /* 现代浏览器：标点挤压 */
  hanging-punctuation: allow-end last;
}
h1, h2, h3, h4, h5, h6 {
  text-wrap: balance; /* 标题更均衡换行 */
  overflow-wrap: break-word;
}
p { text-wrap: pretty; overflow-wrap: break-word; }

/* 中英文之间自动空隙（仅作用于正文段落，避免影响 UI 标签） */
.article-body p, .sol-doc p, .prose p, .faq .answer {
  line-break: loose;
}

/* 长文阅读容器：限制最大宽度 + 优化行高 */
.prose {
  max-width: 760px;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--ink-700);
}
.prose p { margin: 0 0 1.2em; }
.prose h2 { font-size: 28px; margin: 2.2em 0 .6em; }
.prose h3 { font-size: 22px; margin: 1.8em 0 .5em; }
.prose h4 { font-size: 18px; margin: 1.5em 0 .4em; }
.prose ul, .prose ol { margin: 0 0 1.2em; padding-left: 1.4em; }
.prose li { margin-bottom: .4em; line-height: 1.8; }
.prose ul li::marker { color: var(--brand-500); }
.prose ol li::marker { color: var(--brand-600); font-weight: 700; }
.prose blockquote {
  margin: 1.6em 0;
  padding: 14px 20px;
  border-left: 4px solid var(--brand-300);
  background: var(--brand-50);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  color: var(--ink-700);
  font-style: normal;
}
.prose blockquote p:last-child { margin-bottom: 0; }
.prose code {
  font-family: var(--font-mono);
  font-size: .88em;
  background: var(--ink-50);
  padding: 2px 6px;
  border-radius: var(--r-xs);
  color: var(--brand-700);
  border: 1px solid var(--border);
}
.prose pre {
  background: var(--ink-900);
  color: #E5E7EB;
  padding: 18px 22px;
  border-radius: var(--r-md);
  overflow-x: auto;
  margin: 1.4em 0;
  font-size: 14px;
  line-height: 1.7;
}
.prose pre code { background: transparent; border: 0; padding: 0; color: inherit; font-size: inherit; }
.prose a { color: var(--brand-600); text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 1px; text-decoration-color: rgba(46,91,255,.35); transition: text-decoration-color var(--d-fast) var(--ease); }
.prose a:hover { text-decoration-color: var(--brand-600); }
.prose img { border-radius: var(--r-md); margin: 1.4em 0; border: 1px solid var(--border); }
.prose table { width: 100%; border-collapse: collapse; margin: 1.4em 0; font-size: 14.5px; }
.prose table th, .prose table td { padding: 10px 14px; border: 1px solid var(--border); text-align: left; }
.prose table th { background: var(--bg-soft); font-weight: 700; }
.prose table tr:nth-child(even) td { background: var(--ink-25); }
.prose hr { border: 0; height: 1px; background: linear-gradient(90deg, transparent, var(--border), transparent); margin: 2.4em 0; }

/* 章节锚点偏移（避免 sticky header 遮挡） */
.prose h2[id], .prose h3[id] { scroll-margin-top: calc(var(--header-h) + 24px); }

/* ============================================================
   V4 · 响应式细节 / Responsive Refinement
   ============================================================ */

/* 平板断点 1024-1100px：保护中密度屏幕 */
@media (max-width: 1100px) {
  :root { --header-h: 64px; }
  .container, .container-wide { padding: 0 20px; }
  .section { padding: 80px 0; }
  .section-lg { padding: 96px 0; }
}

/* 移动端字号/间距优化 */
@media (max-width: 768px) {
  :root { --header-h: 60px; }
  body { font-size: 15.5px; }
  .container, .container-wide { padding: 0 16px; }
  .section { padding: 56px 0; }
  .section-sm { padding: 40px 0; }
  .section-lg { padding: 64px 0; }
  .section-head { margin-bottom: 36px; }
  .card { padding: 24px; }
  .pain-card { padding: 24px; }
  .plan { padding: 26px; }
  .step { padding: 22px 22px 22px; }
  .cta-banner { padding: 36px 20px; border-radius: var(--r-xl); }
  .hero, .hero-mega, .hero-b2b { padding: 80px 0 56px; }
  .hero-mega { padding: 88px 0 64px; }
  .page-header-b2b { padding: 64px 0 44px; }
  .page-header-v2 { padding: 120px 0 56px; }
  .hero h1, .hero-mega h1, .hero-b2b h1 { letter-spacing: -.02em; }
  .hero-sub, .hero-mega .hero-sub, .hero-b2b .hero-sub { font-size: 16px; line-height: 1.7; }
  .section-title { letter-spacing: -.015em; }
  .footer-grid { gap: 28px; }
  .site-footer { padding: 48px 0 20px; margin-top: 56px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; gap: 12px; }
}

/* 触摸目标优化：可点击元素至少 44x44 */
@media (max-width: 768px) and (pointer: coarse) {
  .btn { min-height: 44px; padding: 12px 20px; }
  .btn-sm { min-height: 40px; }
  .nav-link { padding: 12px 14px; min-height: 44px; display: flex; align-items: center; }
  .sol-tab { padding: 12px 18px; min-height: 44px; }
  .faq summary { padding: 14px 0; min-height: 44px; }
  .dropdown-menu a { padding: 12px 12px; min-height: 44px; }
  .footer-bottom .legal a { padding: 6px 0; }
  .plan .btn, .cta-banner .cta-form .btn { min-height: 48px; }
}

/* 超窄屏 ≤ 380px：进一步紧凑 */
@media (max-width: 380px) {
  .hero h1, .hero-mega h1, .hero-b2b h1 { font-size: 32px; }
  .section-title { font-size: 26px; }
  .card { padding: 20px; }
  .hero-cta, .hero-cta-group { gap: 10px; }
  .btn { padding: 11px 18px; font-size: 14px; width: 100%; }
  .hero-cta .btn, .hero-cta-group .btn { flex: 1 1 100%; }
}

/* 大屏 ≥ 1440px：稍微放大正文 */
@media (min-width: 1440px) {
  body { font-size: 16.5px; }
  :root { --container: 1240px; --container-wide: 1360px; }
}

/* ============================================================
   V4 · 微交互优化 / Micro-interactions
   ============================================================ */

/* 卡片 hover 微光晕（更精致） */
.card-feature::after {
  content: ""; position: absolute; inset: 0;
  border-radius: inherit;
  background: radial-gradient(400px 160px at var(--mx, 50%) var(--my, 0%), rgba(46, 91, 255, .10), transparent 60%);
  opacity: 0; transition: opacity var(--d) var(--ease);
  pointer-events: none;
}
.card-feature:hover::after { opacity: 1; }

/* 按钮波纹点击反馈 */
.btn { position: relative; overflow: hidden; }
.btn::after {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(circle at var(--rx, 50%) var(--ry, 50%), rgba(255,255,255,.35), transparent 50%);
  opacity: 0; transition: opacity .5s var(--ease);
  pointer-events: none;
}
.btn:active::after { opacity: 1; transition: opacity 0s; }

/* 链接 hover 下划线动画（用于正文链接） */
.link-underline {
  position: relative;
  color: var(--brand-600);
  text-decoration: none;
}
.link-underline::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -2px;
  height: 1.5px; background: currentColor;
  transform: scaleX(0); transform-origin: left center;
  transition: transform var(--d) var(--ease);
}
.link-underline:hover::after { transform: scaleX(1); }

/* nav-link 下划线动画（更流畅） */
.nav-link::before {
  content: ""; position: absolute; left: 50%; right: 50%; bottom: 4px;
  height: 2px; background: var(--brand-500); border-radius: 2px;
  transition: left var(--d) var(--ease), right var(--d) var(--ease);
}
.nav-link:hover::before, .nav-link[aria-current="page"]::before { left: 14px; right: 14px; }
/* 移除旧版 ::after（避免重复下划线） */
.nav-link[aria-current="page"]::after { display: none; }

/* 滚动到顶部按钮 */
.back-to-top {
  position: fixed; right: 24px; bottom: 24px; z-index: 40;
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--ink-900); color: #fff;
  display: grid; place-items: center;
  box-shadow: var(--shadow-lg);
  opacity: 0; visibility: hidden; transform: translateY(12px) scale(.9);
  transition: opacity var(--d) var(--ease), transform var(--d) var(--ease), visibility var(--d) var(--ease), background var(--d-fast) var(--ease);
  border: 1px solid rgba(255,255,255,.08);
}
.back-to-top.show { opacity: 1; visibility: visible; transform: translateY(0) scale(1); }
.back-to-top:hover { background: var(--brand-600); transform: translateY(-2px) scale(1.05); }
.back-to-top svg { width: 18px; height: 18px; }
@media (max-width: 768px) {
  .back-to-top { right: 16px; bottom: 16px; width: 40px; height: 40px; }
}

/* 阅读进度条（顶部） */
.reading-progress {
  position: fixed; top: 0; left: 0; height: 3px; z-index: 100;
  background: linear-gradient(90deg, var(--brand-500), #7C3AED);
  width: 0%;
  transition: width .1s linear, opacity .3s var(--ease);
  box-shadow: 0 0 8px rgba(46, 91, 255, .5);
}
.reading-progress.hide { opacity: 0; }

/* 滚动 reveal 增强：错峰动画 */
.reveal-stagger > * { opacity: 0; transform: translateY(20px); transition: opacity .8s var(--ease-out), transform .8s var(--ease-out); }
.reveal-stagger.in > *:nth-child(1) { transition-delay: 0s; }
.reveal-stagger.in > *:nth-child(2) { transition-delay: .08s; }
.reveal-stagger.in > *:nth-child(3) { transition-delay: .16s; }
.reveal-stagger.in > *:nth-child(4) { transition-delay: .24s; }
.reveal-stagger.in > *:nth-child(5) { transition-delay: .32s; }
.reveal-stagger.in > *:nth-child(6) { transition-delay: .40s; }
.reveal-stagger.in > * { opacity: 1; transform: none; }

/* ============================================================
   V4 · 参考 baolinyun 风格的新组件
   ============================================================ */

/* 三大痛点网格：左侧色条 + 编号 */
.pain-points-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
@media (max-width: 900px) { .pain-points-grid { grid-template-columns: 1fr; } }
.pain-point {
  position: relative;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 32px 28px 28px 32px;
  overflow: hidden;
  transition: transform var(--d) var(--ease), box-shadow var(--d) var(--ease), border-color var(--d) var(--ease);
}
.pain-point::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 4px;
  background: linear-gradient(180deg, var(--brand-500), var(--brand-700));
}
.pain-point.pp-2::before { background: linear-gradient(180deg, #F59E0B, #D97706); }
.pain-point.pp-3::before { background: linear-gradient(180deg, #EF4444, #B91C1C); }
.pain-point:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--ink-200); }
.pain-point .pp-num {
  position: absolute; top: 24px; right: 28px;
  font-family: var(--font-mono);
  font-size: 56px; font-weight: 800;
  color: var(--ink-50);
  line-height: 1; letter-spacing: -.04em;
  z-index: 0;
}
.pain-point h3 {
  position: relative; z-index: 1;
  font-size: 20px; margin-bottom: 12px;
}
.pain-point p {
  position: relative; z-index: 1;
  color: var(--ink-600); font-size: 14.5px; line-height: 1.75; margin-bottom: 18px;
}
.pain-point .pp-link {
  position: relative; z-index: 1;
  display: inline-flex; align-items: center; gap: 6px;
  color: var(--brand-600); font-size: 13.5px; font-weight: 600;
}
.pain-point .pp-link::after { content: "→"; transition: transform var(--d-fast) var(--ease); }
.pain-point:hover .pp-link::after { transform: translateX(3px); }

/* 客户证言卡片：左侧大引号 + 头像首字 */
.testimonial-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
@media (max-width: 1000px) { .testimonial-grid { grid-template-columns: 1fr; } }
.testimonial {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 28px;
  display: flex; flex-direction: column;
  transition: transform var(--d) var(--ease), box-shadow var(--d) var(--ease);
}
.testimonial:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.testimonial .t-tag {
  display: inline-flex; align-items: center; gap: 6px;
  align-self: flex-start;
  background: var(--brand-50); color: var(--brand-700);
  padding: 4px 12px; border-radius: var(--r-pill);
  font-size: 12px; font-weight: 700;
  margin-bottom: 14px;
}
.testimonial .t-quote {
  font-size: 15px; line-height: 1.8; color: var(--ink-700);
  flex: 1; position: relative; padding-top: 8px;
}
.testimonial .t-quote::before {
  content: """;
  position: absolute; top: -10px; left: -4px;
  font-size: 56px; line-height: 1;
  color: var(--brand-100);
  font-family: Georgia, "Times New Roman", serif;
  z-index: 0;
}
.testimonial .t-quote > * { position: relative; z-index: 1; }
.testimonial .t-author {
  display: flex; align-items: center; gap: 12px;
  padding-top: 18px; margin-top: 18px;
  border-top: 1px solid var(--border);
}
.testimonial .t-avatar {
  width: 44px; height: 44px; border-radius: 50%;
  display: grid; place-items: center;
  background: linear-gradient(135deg, var(--brand-100), var(--brand-50));
  color: var(--brand-700); font-weight: 700; font-size: 18px;
  flex-shrink: 0;
}
.testimonial .t-avatar.a2 { background: linear-gradient(135deg, #FEF3C7, #FDE68A); color: #92400E; }
.testimonial .t-avatar.a3 { background: linear-gradient(135deg, #DCFCE7, #BBF7D0); color: #166534; }
.testimonial .t-info b { display: block; font-size: 14.5px; color: var(--ink-900); font-weight: 700; }
.testimonial .t-info span { display: block; font-size: 12.5px; color: var(--ink-500); margin-top: 2px; }

/* 城市服务网格 */
.city-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px;
}
@media (max-width: 900px) { .city-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .city-grid { grid-template-columns: 1fr; } }
.city-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 22px 20px;
  display: flex; flex-direction: column; gap: 6px;
  position: relative;
  transition: transform var(--d) var(--ease), box-shadow var(--d) var(--ease), border-color var(--d) var(--ease);
}
.city-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--brand-300); }
.city-card .c-name {
  font-size: 18px; font-weight: 700; color: var(--ink-900);
  display: flex; align-items: center; gap: 8px;
}
.city-card .c-name::before {
  content: ""; width: 6px; height: 6px; border-radius: 50%;
  background: var(--brand-500);
  box-shadow: 0 0 0 3px rgba(46, 91, 255, .15);
}
.city-card .c-ind { font-size: 13px; color: var(--ink-500); }
.city-card .c-arrow {
  position: absolute; top: 22px; right: 20px;
  color: var(--ink-300); transition: color var(--d-fast) var(--ease), transform var(--d-fast) var(--ease);
}
.city-card:hover .c-arrow { color: var(--brand-600); transform: translate(2px, -2px); }

/* 城市网格的"远程服务"特殊卡片 */
.city-remote {
  grid-column: 1 / -1;
  background: linear-gradient(135deg, var(--brand-50) 0%, #fff 100%);
  border: 1px dashed var(--brand-300);
  border-radius: var(--r-md);
  padding: 22px 24px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  flex-wrap: wrap;
}
.city-remote .cr-body { flex: 1 1 320px; }
.city-remote .cr-body b { display: block; font-size: 16px; color: var(--ink-900); margin-bottom: 4px; }
.city-remote .cr-body span { font-size: 13.5px; color: var(--ink-600); }
.city-remote .btn { flex-shrink: 0; }

/* FAQ 增强样式 */
.faq details[open] { box-shadow: var(--shadow-sm); }
.faq .answer { animation: faq-open .35s var(--ease-out); }
@keyframes faq-open {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: none; }
}

/* ============================================================
   V4 · 可访问性 / Accessibility
   ============================================================ */

/* 更清晰的 focus-visible：所有交互元素 */
a:focus-visible, button:focus-visible, .btn:focus-visible,
.nav-link:focus-visible, .dropdown-menu a:focus-visible,
.sol-tab:focus-visible, .faq summary:focus-visible,
.plan .btn:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible {
  outline: 2px solid var(--brand-500);
  outline-offset: 2px;
  border-radius: var(--r-sm);
}

/* 跳过链接增强 */
.skip-link:focus {
  outline: 2px solid var(--brand-500);
  outline-offset: 2px;
  box-shadow: var(--shadow-lg);
}

/* 暗色模式（轻量适配：仅反色基底，不重写品牌色） */
@media (prefers-color-scheme: dark) {
  /* 默认不启用，仅在 body.auto-dark 时生效，避免破坏品牌设计 */
}
body.dark {
  --bg: #0B1220;
  --bg-soft: #111827;
  --bg-muted: #1F2937;
  --border: #1F2937;
  --border-strong: #374151;
  --ink-25: #0B1220;
  --ink-50: #111827;
  --ink-100: #1F2937;
  --ink-200: #374151;
  --ink-300: #4B5563;
  --ink-400: #6B7280;
  --ink-500: #9CA3AF;
  --ink-600: #D1D5DB;
  --ink-700: #E5E7EB;
  --ink-800: #F3F4F6;
  --ink-900: #F9FAFB;
  background: var(--bg);
  color: var(--ink-800);
}
body.dark h1, body.dark h2, body.dark h3, body.dark h4 { color: var(--ink-900); }
body.dark p { color: var(--ink-600); }
body.dark .site-header { background: rgba(11, 18, 32, .85); }
body.dark .site-header.scrolled { background: rgba(11, 18, 32, .94); border-bottom-color: var(--border); }
body.dark .card, body.dark .pain-card, body.dark .step, body.dark .case-card,
body.dark .testimonial, body.dark .city-card, body.dark .pain-point,
body.dark .faq details, body.dark .sol-panel, body.dark .plan {
  background: var(--bg-soft); border-color: var(--border);
}
body.dark .nav-link:hover { background: rgba(46, 91, 255, .15); }
body.dark .cta-banner { background: linear-gradient(135deg, var(--brand-700), var(--brand-500)); }
body.dark .product-visual, body.dark .hvc-main, body.dark .hvc-card,
body.dark .floating-stat { background: var(--bg-soft); }
body.dark .pv-row, body.dark .hvc-rank .row, body.dark .hvc-mini { background: var(--bg); border-color: var(--border); }
body.dark .prose code { background: var(--ink-900); }
body.dark .prose pre { background: #000; }

/* 打印样式 */
@media print {
  .site-header, .site-footer, .back-to-top, .reading-progress,
  .nav-toggle, .cta-banner .cta-form, .floating-stat, .hvc-card,
  .ticker, .hero-b2b::before, .hero-b2b::after,
  .hero-mega::before, .hero-mega::after { display: none !important; }
  body { color: #000; background: #fff; font-size: 12pt; }
  .container, .container-wide { max-width: 100% !important; padding: 0 !important; }
  .section, .section-sm, .section-lg { padding: 16pt 0 !important; }
  .hero, .hero-mega, .hero-b2b, .page-header-b2b, .page-header-v2 {
    padding: 16pt 0 !important; background: #fff !important;
  }
  .hero h1, .hero-mega h1, .hero-b2b h1,
  .hero h1 .grad, .hero-mega h1 .grad, .hero-b2b h1 .grad,
  .page-header-b2b h1 .grad {
    color: #000 !important;
    -webkit-text-fill-color: #000 !important;
    background: none !important;
  }
  a { color: #000 !important; text-decoration: underline; }
  a[href]::after { content: " (" attr(href) ")"; font-size: 9pt; color: #555; }
  .card, .pain-card, .step, .case-card, .testimonial, .plan {
    border: 1px solid #ccc !important; box-shadow: none !important;
    page-break-inside: avoid;
  }
  .prose pre, .prose blockquote, .prose table { page-break-inside: avoid; }
  .prose a[href]::after { content: ""; } /* 详情页中正文链接不打印 URL */
}

/* prefers-reduced-motion：禁用浮动/光晕等装饰动画 */
@media (prefers-reduced-motion: reduce) {
  .floating-stat, .hvc-card, .hvc-main, .ticker .track,
  .hero-mega::before, .hero-mega::after, .hero-b2b h1 .grad,
  .mega-stat .num, .metric-showcase .num {
    animation: none !important;
  }
  .card-feature::after, .btn::after { display: none; }
  .reveal-stagger > * { opacity: 1 !important; transform: none !important; transition: none !important; }
  .back-to-top { transition: opacity .2s linear; }
}

/* ============== V5: 移动端排版修复 ============== */
/* 响应式两列栅格（移动端转单列） */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
@media (max-width: 700px) { .grid-2 { grid-template-columns: 1fr; } }
/* 通用修复：内联 1fr 1fr 栅格在移动端强制单列 */
@media (max-width: 700px) { .grid[style*="1fr 1fr"] { grid-template-columns: 1fr !important; gap: 24px !important; } }

/* Footer 移动端紧凑：链列2列排布，品牌区跨整行，整体缩短 */
@media (max-width: 600px) {
  .footer-grid { grid-template-columns: 1fr 1fr !important; gap: 28px 16px; }
  .footer-brand { grid-column: 1 / -1; }
  .site-footer { padding: 40px 0 20px; margin-top: 48px; }
  .footer-brand p { font-size: 13px; line-height: 1.6; }
  .footer-brand p br + * { display: inline; }
  .footer-bottom { margin-top: 28px; padding-top: 18px; flex-direction: column; gap: 10px; }
}
@media (max-width: 380px) {
  .footer-grid { grid-template-columns: 1fr !important; }
}

/* 图标+文字保持同一行，不断行（如 📈 280%+ 询盘增长） */
.badge-item { white-space: nowrap; }
.pv-row .meta { white-space: nowrap; }
.metric { white-space: nowrap; }

/* ============ V6: 全站卡片 图标+标题同行排列（覆盖所有含 card-icon 的 .card 容器） ============ */
/* 原：图标在上、标题在下堆叠。改：图标+标题同一行，描述/列表等其他内容在下方整行 */
.card:has(.card-icon) {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  column-gap: 14px;
  row-gap: 12px;
}
.card .card-icon {
  width: 42px;
  height: 42px;
  border-radius: 11px;
  font-size: 20px;
  margin: 0 !important; /* 覆盖原 margin-bottom: 20px */
  flex: 0 0 auto;
  order: 1;
}
.card .card-title {
  margin: 0;
  flex: 1 1 0;
  min-width: 0;
  min-height: 42px;
  line-height: 1.4;
  display: flex;
  align-items: center;
  order: 2;
}
/* 描述、列表、额外段落等独占整行，位于图标+标题行下方 */
.card .card-desc,
.card > ul,
.card > p:not(.card-desc):not(.card-title) {
  width: 100%;
  flex-basis: 100%;
  margin-top: 4px;
  order: 3;
}
/* 为卡片内后续元素保持顺序 */
.card > *:not(.card-icon):not(.card-title):not(.card-desc):not(ul) {
  order: 4;
  width: 100%;
  flex-basis: 100%;
}

/* ============ V7: 模块间距适度压缩（消除过大留白，保持呼吸感） ============ */
/* 原 .section: 96px 0 → 56px 0；section-head 64px → 24px */
.section { padding: 56px 0; }
.section-sm { padding: 36px 0; }
.section-head { margin-bottom: 24px; }
.section-title { margin: 6px 0 8px; }
.section-sub { line-height: 1.65; }
.mega-stats { padding: 12px 0 20px; }
.stats { padding: 20px 0; }
@media (max-width: 768px) {
  .section { padding: 40px 0; }
  .section-sm { padding: 28px 0; }
  .section-head { margin-bottom: 20px; }
  .mega-stats { padding: 10px 0 16px; }
  .stats { padding: 16px 0; }
}
/* hero 区底部紧凑收口 */
.hero-b2b { padding-bottom: 0; }
/* stats 数据条紧贴 hero 下方，且与下一section无额外间距 */
section.container-wide[aria-label="服务能力数据"] { padding-top: 16px !important; padding-bottom: 0 !important; }
/* stats 后紧跟的 pain section 顶部紧凑 */
#pain { padding-top: 36px !important; }

/* ============================================================
   V4 · 性能优化 / Performance
   ============================================================ */

/* 卡片内容布局独立，提升渲染性能 */
.card, .pain-card, .step, .case-card, .testimonial,
.pain-point, .city-card, .plan {
  contain: layout style;
}

/* 仅在 hover 时启用 transform 提示，避免常驻合成层 */
.card:hover, .step:hover, .case-card:hover, .testimonial:hover,
.pain-point:hover, .city-card:hover {
  will-change: transform;
}

/* 图片渲染优化 */
img { image-rendering: -webkit-optimize-contrast; }
@media (min-resolution: 2dppx) {
  img { image-rendering: auto; }
}

/* 选中文字配色 */
::selection {
  background: rgba(46, 91, 255, .18);
  color: var(--ink-900);
  text-shadow: none;
}
body.dark ::selection {
  background: rgba(46, 91, 255, .35);
  color: #fff;
}

/* 滚动条样式（仅 WebKit） */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--bg-soft); }
::-webkit-scrollbar-thumb { background: var(--ink-200); border-radius: 5px; border: 2px solid var(--bg-soft); }
::-webkit-scrollbar-thumb:hover { background: var(--ink-300); }
body.dark ::-webkit-scrollbar-track { background: var(--bg); }
body.dark ::-webkit-scrollbar-thumb { background: var(--ink-700); border-color: var(--bg); }

/* 表单元素统一 */
input, textarea, select {
  font-family: inherit; font-size: inherit;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 11px 14px;
  background: #fff;
  color: var(--ink-800);
  transition: border-color var(--d-fast) var(--ease), box-shadow var(--d-fast) var(--ease);
  width: 100%;
}
input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--brand-500);
  box-shadow: 0 0 0 3px rgba(46, 91, 255, .12);
}
input::placeholder, textarea::placeholder { color: var(--ink-400); }
label { display: block; font-size: 14px; font-weight: 600; color: var(--ink-700); margin-bottom: 6px; }
fieldset { border: 1px solid var(--border); border-radius: var(--r-md); padding: 16px; }
legend { padding: 0 8px; font-weight: 700; color: var(--ink-700); }

/* 表单错误状态 */
input.error, textarea.error, select.error {
  border-color: var(--danger);
  box-shadow: 0 0 0 3px rgba(239, 68, 68, .12);
}
.field-error { display: none; color: var(--danger); font-size: 12.5px; margin-top: 6px; }
.field-error.show { display: block; }

/* 视觉隐藏（仅供屏幕阅读器） */
.sr-only {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0);
  white-space: nowrap; border: 0;
}

/* ============================================================
   V8 · 大公司范全局增强层（Apple/Stripe 式极简精致风）
   1. 按钮质感  2. 页头净化  3. 数据条统一  4. 留白呼吸感  5. 卡片精致化
   ============================================================ */

/* --- 1. 按钮系统：更圆润、hover 上浮、弥散阴影 --- */
.btn-lg { padding: 15px 32px; font-size: 16px; border-radius: 12px; letter-spacing: .01em; }
.btn-primary {
  box-shadow: 0 8px 20px -6px rgba(46, 91, 255, .4), 0 2px 6px rgba(15, 23, 42, .06);
  transition: transform .25s cubic-bezier(.4,0,.2,1), box-shadow .25s, background .25s;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 28px -8px rgba(46, 91, 255, .45), 0 3px 8px rgba(15, 23, 42, .08);
}
.btn-accent {
  box-shadow: 0 8px 20px -6px rgba(217, 119, 6, .4), 0 2px 6px rgba(15, 23, 42, .06);
  transition: transform .25s cubic-bezier(.4,0,.2,1), box-shadow .25s, filter .25s;
}
.btn-accent:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 28px -8px rgba(217, 119, 6, .45), 0 3px 8px rgba(15, 23, 42, .08);
}
.btn-ghost {
  transition: transform .25s cubic-bezier(.4,0,.2,1), background .25s, color .25s, border-color .25s;
}
.btn-ghost:hover { transform: translateY(-2px); }

/* --- 2. 子页面页头净化：去网格线，纯净浅底 + 单一品牌蓝光晕 --- */
.page-header-b2b {
  padding: 48px 0 56px;
  background:
    radial-gradient(900px 420px at 50% -10%, rgba(46, 91, 255, .09), transparent 62%),
    #FBFCFE;
}
.page-header-b2b::before { display: none; }
.page-header-b2b h1 { letter-spacing: -.032em; }
@media (max-width: 768px) {
  .page-header-b2b { padding: 36px 0 40px; }
}

/* --- 3. 数据条：彩色图标块 → 统一品牌蓝淡底（克制配色） --- */
.mega-stat .ico { background: var(--brand-50) !important; }
.mega-stats { padding: 28px 0 44px; }

/* --- 4. 留白呼吸感：section 间距从紧凑回调至从容 --- */
.section { padding: 72px 0; }
.section-head { margin-bottom: 40px; }
.section-title { letter-spacing: -.025em; }
@media (max-width: 768px) {
  .section { padding: 48px 0; }
  .section-head { margin-bottom: 28px; }
}
/* hero 底部保持紧凑收口（原 V7 规则优先） */
.hero-b2b { padding-bottom: 0; }

/* --- 5. 卡片精致化：hover 细阴影 + 边框过渡更柔和 --- */
.card, .pain-card, .case-card, .plan {
  transition: transform .3s cubic-bezier(.4,0,.2,1), box-shadow .3s, border-color .3s;
}
.card:hover, .pain-card:hover, .case-card:hover {
  box-shadow: 0 12px 32px -12px rgba(15, 23, 42, .12);
}

/* --- 6. eyebrow 标签统一精致化 --- */
.eyebrow, .eyebrow-tag { letter-spacing: .06em; }

/* --- 7. 面包屑：hero 底部，细腻自然（无线条、极简留白） --- */
.page-header-b2b > .breadcrumb-outer {
  margin-top: 14px;
}
.breadcrumb-outer .breadcrumb {
  font-size: 12px;
  color: var(--ink-300);
  margin-bottom: 0;
  letter-spacing: .01em;
}
.breadcrumb-outer .breadcrumb a { color: var(--ink-400); }
.breadcrumb-outer .breadcrumb a:hover { color: var(--brand-600); }