/* @critical */
/* 源 partial —— 由 scripts/split_css.py 从 style.css 切分；修改请编辑本目录文件，再运行 build_critical.py 重新生成 style.css */

/* ============================================================
   尚水数字 · 供水营收系统官网
   设计系统: Water Theme / Modern SaaS / Clean Professional
   版本: 2.0 — 全站统一样式
   ============================================================ */

/* ---------- CSS Custom Properties ---------- */
:root {
  /* Brand */
  --brand: #0284C7;
  --brand-dark: #0369A1;
  --brand-deep: #0C4A6E;
  --brand-light: #E0F2FE;
  --brand-glow: #BAE6FD;

  /* Accent */
  --cyan: #06B6D4;
  --cyan-dark: #0891B2;
  --emerald: #10B981;
  --emerald-dark: #059669;
  --amber: #F59E0B;
  --red: #EF4444;

  /* Neutral */
  --white: #FFFFFF;
  --bg: #FFFFFF;
  --bg-soft: #F0F9FF;
  --bg-alt: #F8FAFC;
  --bg-card: #FFFFFF;
  --bg-footer: #0F172A;

  /* Text */
  --text: #0F172A;
  --text-secondary: #475569;
  --text-muted: #5B6678;
  --text-on-dark: #E2E8F0;
  --text-on-dark-muted: #94A3B8;

  /* Border */
  --border: #E2E8F0;
  --border-light: #F1F5F9;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 12px 40px rgba(15, 23, 42, 0.08);
  --shadow-xl: 0 20px 60px rgba(15, 23, 42, 0.12);
  --shadow-blue: 0 8px 30px rgba(2, 132, 199, 0.15);

  /* Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-pill: 100px;

  /* Typography */
  --font-sans: "Noto Sans SC", system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "WenQuanYi Micro Hei", sans-serif;
  --font-cjk: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "WenQuanYi Micro Hei", sans-serif;
  --font-num: "SF Pro Display", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;

  /* Type scale */
  --text-xs: 0.75rem;    /* 12px — 最小标签/徽章底线 */
  --text-sm: 0.875rem;   /* 14px */
  --text-base: 1rem;     /* 16px — 正文基准 */
  --text-md: 0.9375rem;  /* 15px — 卡片正文 */
  --text-lg: 1.125rem;   /* 18px */
  --text-xl: 1.25rem;    /* 20px */

  /* Heading scale */
  --h1: clamp(2.2rem, 4.5vw, 3.6rem);    /* 35.2–57.6 — 首页 Hero */
  --h1-page: clamp(1.9rem, 4vw, 2.9rem); /* 30.4–46.4 — 子页 Hero（联系/价格统一） */
  --h2: clamp(1.7rem, 3vw, 2.4rem);      /* 27.2–38.4 */
  --h2-card: 1.5rem;                      /* 24 — 卡片内区块标题（如联系表单） */
  --h3: 1.25rem;                          /* 20 — 区块标题（含 .block-h） */
  --h3-card: 1.1rem;                      /* 17.6 — 卡片标题统一档 */
  --h4: 1rem;                             /* 16 — 小标题统一档 */

  /* Line Height Scale */
  --leading-tight: 1.2;    /* 大标题 */
  --leading-snug: 1.35;    /* 小标题 */
  --leading-normal: 1.5;   /* 正文 */
  --leading-relaxed: 1.7;  /* 长文本 */
  --leading-loose: 1.8;    /* 辅助文本/引文 */

  /* Layout */
  --maxw: 1200px;
  --header-h: 72px;
  --section-gap: 100px;
  --section-gap-mobile: 64px;

  /* Spacing Scale (8px base) */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --space-9: 100px;

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --duration-fast: 0.2s;
  --duration-normal: 0.3s;
  --duration: 0.4s;
  --duration-slow: 0.7s;
}

/* @endcritical */

/* @critical */
/* 源 partial —— 由 scripts/split_css.py 从 style.css 切分；修改请编辑本目录文件，再运行 build_critical.py 重新生成 style.css */

/* ---------- Reset & Base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
section[id] { scroll-margin-top: var(--header-h); }
body {
  font-family: var(--font-sans);
  color: var(--text);
  background: var(--bg);
  line-height: var(--leading-relaxed);
  font-size: var(--text-base);
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeSpeed;
  overflow-wrap: anywhere;
  overflow-x: hidden;
}
a { color: var(--brand); text-decoration: none; transition: color var(--duration-fast); }
a:hover { color: var(--brand-dark); }
img { max-width: 100%; display: block; height: auto; }
h1, h2, h3, h4 { line-height: var(--leading-snug); color: var(--text); font-weight: 700; }
h1 { font-size: var(--h1); letter-spacing: normal; }
h2 { font-size: var(--h2); letter-spacing: normal; }
h3 { font-size: var(--h3); }
h4 { font-size: var(--h4); }
p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }
ul, ol { margin: 0 0 1em; padding-left: 1.5em; }

/* ---------- Utility ---------- */
.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); border: 0;
}
.text-center, .center { text-align: center; }
.text-gradient {
  background: linear-gradient(135deg, var(--brand), var(--cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.muted { color: var(--text-muted); }
.hl { color: var(--brand); font-weight: 700; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 28px; border-radius: var(--radius-md); font-size: var(--text-md);
  font-weight: 600; line-height: 1; text-decoration: none; cursor: pointer;
  border: none; transition: all var(--duration-fast) var(--ease-out); white-space: nowrap;
  font-family: inherit;
}
.btn-primary {
  background: linear-gradient(135deg, var(--brand), var(--cyan-dark));
  color: #fff; box-shadow: var(--shadow-blue);
}
.btn-primary:hover {
  transform: translateY(-2px); box-shadow: 0 12px 36px rgba(2, 132, 199, 0.25);
  color: #fff;
}
.btn-outline {
  background: transparent; color: var(--brand); border: 2px solid var(--brand);
}
.btn-outline:hover {
  background: var(--brand); color: #fff; transform: translateY(-2px);
}
.btn-white {
  background: var(--white); color: var(--brand); box-shadow: var(--shadow-sm);
}
.btn-white:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.btn-ghost {
  background: transparent; color: var(--text-secondary); border: 1px solid var(--border);
  padding: 8px 18px; border-radius: var(--radius-sm); font-size: var(--text-sm);
  cursor: pointer; font-weight: 500; font-family: inherit;
  transition: all var(--duration-fast);
}
.btn-ghost:hover { color: var(--brand); border-color: var(--brand); background: var(--brand-light); }
.btn-lg { padding: 16px 36px; font-size: 1.05rem; border-radius: var(--radius-lg); }
.btn-sm { padding: 8px 18px; font-size: var(--text-sm); }
.btn:disabled { opacity: 0.6; cursor: not-allowed; transform: none !important; }
.btn:active:not(:disabled) { transform: translateY(0) scale(0.98); box-shadow: var(--shadow-sm); }
.btn-primary:active:not(:disabled) { box-shadow: 0 4px 14px rgba(2, 132, 199, 0.2); }

/* Touch target minimum size for interactive elements */
@media (pointer: coarse) {
  .btn { min-height: 44px; }
  .nav-links a { min-height: 44px; display: flex; align-items: center; }
  .hamburger { min-width: 44px; min-height: 44px; }
  .lightbox-close { width: 56px; height: 56px; }
  .back-to-top { width: 52px; height: 52px; }
}

/* ---------- Section Common ---------- */
.section {
  padding: var(--section-gap) 0;
}
.section-soft {
  padding: var(--section-gap) 0;
  background: var(--bg-soft);
}
.section-alt {
  padding: var(--section-gap) 0;
  background: var(--bg-alt);
}
.section-label {
  display: inline-block; font-size: var(--text-sm); font-weight: 700; color: var(--brand-dark);
  text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 12px;
  padding: 4px 12px; background: var(--brand-light); border-radius: var(--radius-pill);
}
.section-title {
  margin-bottom: 16px; font-weight: 700;
}
.section-sub {
  color: var(--text-secondary); font-size: 1.125rem; max-width: 640px;
  margin: 0 auto 48px; line-height: var(--leading-relaxed);
}
.section-sub.left { margin-left: 0; }

/* Eyebrow (hero label) */
.eyebrow {
  display: inline-block; font-size: var(--text-sm); font-weight: 700; color: var(--brand-dark);
  text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 12px;
  padding: 4px 12px; background: var(--brand-light); border-radius: var(--radius-pill);
}
.lead {
  font-size: 1.15rem; color: var(--text-secondary); max-width: 720px;
  margin: 0 auto; line-height: var(--leading-loose);
}

/* ---------- Grid Helpers ---------- */
.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

/* ---------- Icon Helpers ---------- */
.ic {
  width: 48px; height: 48px; display: flex; align-items: center; justify-content: center;
  background: var(--brand-light); border-radius: var(--radius-md);
  margin-bottom: 16px; color: var(--brand); flex-shrink: 0;
}
.ico { width: 24px; height: 24px; flex-shrink: 0; }
.ico-inline { width: 20px; height: 20px; display: inline-block; vertical-align: middle; margin-right: 6px; margin-top: -2px; }

/* ---------- Tag ---------- */
.tag {
  display: inline-block; font-size: var(--text-sm); font-weight: 500; color: var(--brand);
  background: var(--brand-light); padding: 3px 10px; border-radius: var(--radius-pill);
  margin-top: 8px; letter-spacing: 0.02em;
}

/* @endcritical */

/* 源 partial —— 由 scripts/split_css.py 从 style.css 切分；修改请编辑本目录文件，再运行 build_critical.py 重新生成 style.css */

/* @critical */
/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.85);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--duration-normal), box-shadow var(--duration-normal);
}
.site-header.scrolled {
  border-bottom-color: var(--border);
  box-shadow: 0 1px 8px rgba(15, 23, 42, 0.06);
}
.nav {
  display: flex; align-items: center; justify-content: space-between;
  height: var(--header-h); gap: 32px;
}
.nav-left { display: flex; align-items: center; gap: 40px; }
.brand {
  display: flex; align-items: center; gap: 10px; font-weight: 700;
  font-size: 1.15rem; color: var(--text); text-decoration: none; flex-shrink: 0;
}
.brand .logo-img { width: 38px; height: 38px; border-radius: 10px; object-fit: contain; }
.brand small { display: block; font-size: var(--text-xs); font-weight: 500; color: var(--text-muted); letter-spacing: 0.05em; }
.nav-links { display: flex; gap: 4px; align-items: center; }
.nav-links a {
  padding: 8px 14px; border-radius: var(--radius-sm); color: var(--text-secondary);
  font-size: var(--text-sm); font-weight: 500; transition: all var(--duration-fast); text-decoration: none;
}
.nav-links a:hover { color: var(--brand); background: var(--brand-light); }
.nav-links a.active { color: var(--brand); background: var(--brand-light); font-weight: 600; }
.nav-cta { display: flex; gap: 10px; align-items: center; flex-shrink: 0; }

/* Hamburger */
.hamburger {
  display: none; flex-direction: column; gap: 5px; background: none; border: none;
  cursor: pointer; padding: 8px; z-index: 101;
}
.hamburger span {
  display: block; width: 22px; height: 2px; background: var(--text);
  border-radius: 2px; transition: all var(--duration-normal) var(--ease-out);
}
.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

/* Mobile nav overlay */
@media (max-width: 900px) {
  .nav-links {
    position: fixed; top: 0; right: -100%; width: 280px; height: 100vh;
    background: var(--white); flex-direction: column; gap: 4px; padding: 80px 24px 24px;
    box-shadow: -8px 0 30px rgba(15, 23, 42, 0.12);
    transition: right var(--duration) var(--ease-out); z-index: 100;
  }
  .nav-links.open { right: 0; }
  .nav-links a { width: 100%; padding: 12px 16px; font-size: 1rem; }
  .nav-cta { display: none; }
  .hamburger { display: flex; }
}
@media (min-width: 901px) {
  .nav-cta-mobile { display: none; }
}

/* ---------- Hero ---------- */
.hero {
  position: relative; padding: 80px 0 100px; overflow: hidden;
  background: linear-gradient(180deg, #F0F9FF 0%, #FFFFFF 100%);
}
.hero::before {
  content: ''; position: absolute; top: -50%; right: -20%; 
  width: 800px; height: 800px;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.08) 0%, transparent 70%);
  border-radius: 50%; pointer-events: none;
}
.hero::after {
  content: ''; position: absolute; bottom: -30%; left: -10%;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(2, 132, 199, 0.06) 0%, transparent 70%);
  border-radius: 50%; pointer-events: none;
}
.hero-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center;
  position: relative; z-index: 1;
}
.hero-copy { max-width: 560px; }
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: var(--text-sm); font-weight: 700; color: var(--brand);
  background: rgba(2, 132, 199, 0.08); padding: 6px 16px;
  border-radius: var(--radius-pill); margin-bottom: 24px;
}
.hero-eyebrow::before {
  content: ''; width: 8px; height: 8px; border-radius: 50%;
  background: var(--emerald); box-shadow: 0 0 8px rgba(16, 185, 129, 0.6);
  animation: pulse-dot 2s ease-in-out infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.5); }
}
.hero-title {
  font-size: var(--h1); font-weight: 700;
  line-height: var(--leading-tight); letter-spacing: normal; margin-bottom: 24px; color: var(--text);
}
.hero-title .highlight {
  background: linear-gradient(135deg, var(--brand), var(--cyan));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.hero-desc {
  font-size: 1.15rem; color: var(--text-secondary); line-height: var(--leading-loose);
  margin-bottom: 36px;
}
.hero-btns { display: flex; gap: 14px; align-items: center; flex-wrap: wrap; margin-bottom: 40px; }
.hero-trust {
  display: flex; gap: 24px; align-items: center; padding-top: 24px;
  border-top: 1px solid var(--border); flex-wrap: wrap;
}
.hero-trust-item { display: flex; align-items: center; gap: 8px; font-size: var(--text-sm); color: var(--text-secondary); }
.hero-trust-item .check-icon {
  width: 18px; height: 18px; color: var(--emerald); flex-shrink: 0;
}
.hero-visual {
  position: relative; display: flex; align-items: center; justify-content: center;
}
/* ---- Pure CSS Browser Mockup Frame ---- */
.browser-mockup {
  position: relative; width: 100%;
  background: var(--white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
  transition: transform var(--duration) var(--ease-out), box-shadow var(--duration) var(--ease-out);
}
.browser-mockup:hover {
  transform: translateY(-6px);
  box-shadow: 0 30px 70px rgba(15, 23, 42, 0.16), var(--shadow-blue);
}
.browser-mockup__bar {
  display: flex; align-items: center; gap: 8px;
  padding: 14px 18px;
  background: linear-gradient(180deg, #F8FAFC 0%, #EEF2F6 100%);
  border-bottom: 1px solid var(--border);
}
.bm-dot { width: 12px; height: 12px; border-radius: 50%; flex-shrink: 0; }
.bm-dot--r { background: #FF5F57; }
.bm-dot--y { background: #FEBC2E; }
.bm-dot--g { background: #28C840; }
.browser-mockup__url {
  flex: 1; margin-left: 12px;
  display: flex; align-items: center; gap: 7px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  padding: 6px 14px;
  font-size: var(--text-xs); color: var(--text-muted);
  font-family: var(--font-sans);
  letter-spacing: 0.01em; overflow: hidden; white-space: nowrap;
}
.browser-mockup__url .bm-lock { width: 13px; height: 13px; color: var(--emerald); flex-shrink: 0; }
.bm-url-text { overflow: hidden; text-overflow: ellipsis; }
.browser-mockup__screen { position: relative; background: var(--white); line-height: 0; }
.browser-mockup__screen picture,
.browser-mockup__screen img {
  width: 100%; height: auto; display: block;
  border-radius: 0; box-shadow: none;
}
.hero-visual::before {
  content: ''; position: absolute; top: 20px; left: 20px; right: -20px; bottom: -20px;
  background: linear-gradient(135deg, var(--brand), var(--cyan));
  border-radius: var(--radius-xl); opacity: 0.08; z-index: -1;
}

/* Hero for sub-pages (no grid, centered text) */
.hero-sub { padding: 60px 0 70px; }

/* ---------- Stats Strip ---------- */
.stats {
  padding: 0; margin-top: -40px; position: relative; z-index: 10;
}
.stats-inner {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
  background: var(--white); border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg); border: 1px solid var(--border);
  padding: 36px 40px;
}
.stat-item { text-align: center; }
.stat-num {
  font-size: 2.2rem; font-weight: 800; color: var(--brand);
  line-height: 1; margin-bottom: 8px; font-variant-numeric: tabular-nums;
}
.stat-num .unit { font-size: 1.2rem; font-weight: 600; }
.stat-label { font-size: var(--text-sm); color: var(--text-secondary); font-weight: 500; }

/* @endcritical */
/* ---------- Cards Grid ---------- */
.grid-3 {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.grid-4 {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
}
.card {
  background: var(--bg-card); border-radius: var(--radius-lg);
  padding: 36px 32px; border: 1px solid var(--border);
  transition: all var(--duration) var(--ease-out);

  position: relative; overflow: hidden;
}
.card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--brand), var(--cyan));
  opacity: 0; transition: opacity var(--duration) var(--ease-out);
}
.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg); border-color: transparent;
}
.card:hover::before { opacity: 1; }
.card-icon {
  width: 52px; height: 52px; display: flex; align-items: center; justify-content: center;
  background: var(--brand-light); border-radius: var(--radius-md);
  margin-bottom: 20px; color: var(--brand);
}
.card-icon svg { width: 26px; height: 26px; }
.card h3 { margin-bottom: 10px; font-size: var(--h3-card); font-weight: 700; }
.card p { color: var(--text-secondary); font-size: var(--text-md); line-height: var(--leading-relaxed); }

/* ---------- Card Image Header (decorative) ---------- */
.card-img {
  margin: -36px -32px 20px;
  height: 152px;
  overflow: hidden;
  position: relative;
  background: var(--brand-light);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}
.card-img img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform var(--duration) var(--ease-out);}
/* Skeleton shimmer — visible until image loads, then hidden via .is-loaded */
.card-img::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 200%; height: 100%;
  z-index: 3;
  background-color: var(--brand-light);
  background-image: linear-gradient(100deg,
    var(--brand-light) 0%,
    var(--brand-light) 35%,
    rgba(255, 255, 255, 0.6) 50%,
    var(--brand-light) 65%,
    var(--brand-light) 100%);
  transform: translateX(-50%);
  animation: card-img-shimmer 1.5s var(--ease-in-out) infinite;
  transition: opacity var(--duration) var(--ease-in-out);
}
.card-img.is-loaded::before {
  opacity: 0;
  animation: none;
  pointer-events: none;
}
@keyframes card-img-shimmer {
  0% { transform: translateX(-50%); }
  100% { transform: translateX(0%); }
}
/* Bottom gradient overlay — blends image into card (fades in after load) */
.card-img::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 56%;
  z-index: 2;
  background: linear-gradient(to bottom, transparent, var(--bg-card));
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--duration-normal) var(--ease-in-out);
}
.card-img.is-loaded::after { opacity: 1; }
.card:hover .card-img img { transform: scale(1.06); }
.card-img + .ic { margin-top: -8px; }
@media (prefers-reduced-motion: reduce) {
  .card-img::before { animation: none; transform: translateX(-25%); }
}

/* ---------- Process Flow ---------- */
.flow {
  display: flex; align-items: flex-start; justify-content: center;
  gap: 0; max-width: 900px; margin: 0 auto; flex-wrap: wrap;
}
.flow-node {
  flex: 1; min-width: 140px; text-align: center; padding: 32px 16px;
  background: var(--bg-card); border-radius: var(--radius-lg);
  border: 1px solid var(--border); position: relative;
  transition: all var(--duration) var(--ease-out);

}
.flow-node:hover {
  transform: translateY(-4px); box-shadow: var(--shadow-md);
  border-color: var(--brand-light);
}
.flow-node-icon {
  width: 60px; height: 60px; margin: 0 auto 16px; display: flex;
  align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--brand-light), #E0F2FE);
  border-radius: 50%; color: var(--brand);
}
.flow-node-icon svg { width: 28px; height: 28px; }
.flow-node h3 { font-size: var(--h3-card); margin-bottom: 8px; }
.flow-node ul { list-style: none; padding: 0; }
.flow-node li { font-size: var(--text-md); color: var(--text-secondary); line-height: 2; }
.flow-arrow {
  display: flex; align-items: center; padding: 0 8px;
  font-size: 1.5rem; color: var(--brand); font-weight: 700;
}

/* ---------- Process Flow · 5-step variant (delivery path) ---------- */
.flow--steps { max-width: 1080px; align-items: stretch; }
.flow--steps .flow-node {
  min-width: 150px; padding: 34px 14px 24px;
  display: flex; flex-direction: column;
}
.flow--steps .flow-node-icon { width: 52px; height: 52px; margin-bottom: 14px; }
.flow--steps .flow-node-icon svg { width: 25px; height: 25px; }
.flow--steps .flow-node h3 { font-size: var(--h3-card); margin-bottom: 10px; }
.flow--steps .flow-node li { font-size: var(--text-md); line-height: var(--leading-relaxed); }
.flow--steps .flow-arrow { padding: 0 4px; font-size: 1.25rem; }
.step-no {
  position: absolute; top: 12px; left: 12px;
  width: 22px; height: 22px; border-radius: 50%;
  background: linear-gradient(135deg, var(--brand), var(--cyan-dark));
  color: #fff; display: flex; align-items: center; justify-content: center;
  font-size: var(--text-xs); font-weight: 700; line-height: 1;
}
.flow--steps .flow-node:last-child .step-no { background: linear-gradient(135deg, #059669, #10B981); }

/* ---------- Features Grid ---------- */
.features-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px;
}
.feature-card {
  background: var(--bg-card); border-radius: var(--radius-lg);
  padding: 28px 24px; border: 1px solid var(--border);
  transition: all var(--duration-normal) var(--ease-out); cursor: default; position: relative;
  overflow: hidden;
}
.feature-card::after {
  content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 0;
  background: linear-gradient(90deg, rgba(2,132,199,0.04), rgba(6,182,212,0.04));
  transition: height var(--duration-normal) var(--ease-out); z-index: 0;
}
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--brand-light); }
.feature-card:hover::after { height: 100%; }
.feature-card > * { position: relative; z-index: 1; }
.feature-icon {
  width: 44px; height: 44px; display: flex; align-items: center; justify-content: center;
  background: var(--brand-light); border-radius: var(--radius-sm);
  margin-bottom: 16px; color: var(--brand);
}
.feature-icon svg { width: 22px; height: 22px; }
.feature-card h3 { font-size: var(--h3-card); margin-bottom: 6px; }
.feature-card p { font-size: var(--text-md); color: var(--text-secondary); line-height: var(--leading-normal); margin: 0; }

/* Screenshot trigger in feature card */
.feature-shot {
  display: block; margin-top: 14px; border-radius: var(--radius-sm); overflow: hidden;
  border: 1px solid var(--border); cursor: zoom-in; transition: all var(--duration-fast);
  position: relative; background: none; width: 100%; padding: 0; text-align: left;
}
.feature-shot:hover { border-color: var(--brand); box-shadow: 0 0 0 3px var(--brand-light); }
.feature-shot img { width: 100%; height: auto; display: block; }
.feature-shot-caption {
  display: flex; align-items: center; gap: 6px; justify-content: center;
  padding: 8px; font-size: var(--text-xs); color: var(--text-muted);
  background: var(--bg-alt);
}
.feature-shot-caption svg { width: 14px; height: 14px; }

/* Version note */
.note-box {
  background: var(--brand-light); border-radius: var(--radius-md);
  padding: 16px 20px; font-size: var(--text-sm); color: var(--brand-dark);
  margin-top: 32px; border-left: 3px solid var(--brand);
}

/* ---------- Solutions ---------- */
.solutions-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.solution-card {
  background: var(--bg-card); border-radius: var(--radius-xl); overflow: hidden;
  border: 1px solid var(--border); transition: all var(--duration) var(--ease-out);

}
.solution-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
.solution-card-img {
  height: 180px; display: flex; align-items: center; justify-content: center;
  font-size: 3rem; position: relative; overflow: hidden;
}
.solution-card-img.waterworks { background: linear-gradient(135deg, #DBEAFE, #E0F2FE); }
.solution-card-img.property { background: linear-gradient(135deg, #D1FAE5, #ECFDF5); }
.solution-card-img.township { background: linear-gradient(135deg, #FEF3C7, #FFFBEB); }
.solution-card-body { padding: 24px 28px 28px; }
.solution-card-body h3 { margin-bottom: 8px; font-size: var(--h3-card); }
.solution-card-body p { font-size: var(--text-md); color: var(--text-secondary); line-height: var(--leading-relaxed); margin-bottom: 16px; }
.solution-card-body ul { list-style: none; padding: 0; margin: 0; }
.solution-card-body li {
  font-size: var(--text-md); color: var(--text-secondary); padding: 6px 0;
  border-bottom: 1px solid var(--border-light); display: flex; align-items: baseline; gap: 8px;
}
.solution-card-body li::before {
  content: ''; width: 6px; height: 6px; border-radius: 50%;
  background: var(--brand); flex-shrink: 0; margin-top: 8px;
}
.solution-card-body li:last-child { border-bottom: none; }

/* ---------- Testimonials / Logo Wall ---------- */
.testimonials-slider { position: relative; overflow: hidden; }
.testimonial-cards {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.testimonial-card {
  background: var(--bg-card); border-radius: var(--radius-lg); padding: 32px 28px;
  border: 1px solid var(--border); transition: all var(--duration-normal) var(--ease-out);
}
.testimonial-card:hover { box-shadow: var(--shadow-md); }
.testimonial-quote {
  font-size: var(--text-md); color: var(--text); line-height: var(--leading-loose); font-style: italic;
  margin-bottom: 20px; position: relative; padding-left: 20px;
}
.testimonial-quote::before {
  content: '"'; position: absolute; left: 0; top: -6px; font-size: 2.5rem;
  color: var(--brand); opacity: 0.3; font-style: normal; line-height: 1; font-weight: 700;
}
.testimonial-author { display: flex; align-items: center; gap: 12px; }
.testimonial-author-avatar {
  width: 44px; height: 44px; border-radius: 50%; background: var(--brand-light);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; color: var(--brand); font-size: 1.1rem; flex-shrink: 0;
}
.testimonial-author-info h4 { font-size: var(--h4); margin-bottom: 2px; }
.testimonial-author-info span { font-size: var(--text-sm); color: var(--text-muted); }

.logo-wall { margin-top: 64px; text-align: center; }
.logo-wall-title {
  font-size: var(--text-sm); color: var(--text-muted); text-transform: uppercase;
  letter-spacing: 0.1em; margin-bottom: 28px; font-weight: 600;
}
.logo-wall-grid {
  display: flex; align-items: center; justify-content: center; gap: 48px;
  flex-wrap: wrap; opacity: 0.6;
}
.logo-wall-item {
  height: 40px; width: auto; filter: grayscale(100%); opacity: 0.5;
  transition: all var(--duration-normal);
}
.logo-wall-item:hover { filter: grayscale(0%); opacity: 1; }

/* ---------- CTA Section ---------- */
.cta-section {
  padding: var(--section-gap) 0; position: relative; overflow: hidden;
  background: linear-gradient(135deg, var(--brand-deep), var(--brand-dark));
}
.cta-section::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; bottom: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}
.cta-content {
  position: relative; z-index: 1; text-align: center; max-width: 640px; margin: 0 auto;
}
.cta-content h2 {
  color: var(--white); font-size: var(--h2); margin-bottom: 16px;
}
.cta-content p {
  color: var(--text-on-dark-muted); font-size: 1.1rem; margin-bottom: 36px;
}
.cta-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--bg-footer); padding: 72px 0 32px; color: var(--text-on-dark);
}
.footer-grid {
  display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.3fr; gap: 48px;
  margin-bottom: 48px;
}
.footer-brand-desc, .footer-about {
  color: var(--text-on-dark-muted); font-size: var(--text-sm); line-height: var(--leading-loose);
  margin-top: 16px;
}
.footer-col h4, .footer-grid h4 {
  color: var(--white); font-size: var(--h4); margin-bottom: 16px; font-weight: 700;
}
.footer-col a, .footer-col p, .footer-grid a {
  display: block; color: var(--text-on-dark-muted); font-size: var(--text-sm);
  line-height: var(--leading-loose); text-decoration: none; transition: color var(--duration-fast);
}
.footer-col a:hover, .footer-grid a:hover { color: var(--white); }
.footer-bottom {
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap;
  gap: 16px; padding-top: 28px; border-top: 1px solid rgba(255,255,255,0.08);
  font-size: var(--text-sm); color: var(--text-on-dark-muted);
}

/* @critical */
/* ---------- Floating CTA ---------- */
.float-cta {
  position: fixed; bottom: 28px; right: 28px; z-index: 90;
  display: flex; align-items: center; gap: 10px;
  background: linear-gradient(135deg, var(--brand), var(--cyan-dark));
  color: #fff; padding: 14px 24px; border-radius: var(--radius-pill);
  box-shadow: 0 8px 30px rgba(2, 132, 199, 0.35);
  font-weight: 700; font-size: var(--text-md); text-decoration: none;
  transition: all var(--duration-normal) var(--ease-out);
}
.float-cta:hover {
  transform: translateY(-3px); box-shadow: 0 12px 40px rgba(2, 132, 199, 0.45);
  color: #fff;
}
.float-cta svg { width: 20px; height: 20px; flex-shrink: 0; }

/* @endcritical */
/* ---------- Lightbox ---------- */
.lightbox {
  position: fixed; inset: 0; z-index: 200; background: rgba(15, 23, 42, 0.92);
  display: flex; align-items: center; justify-content: center; flex-direction: column;
  opacity: 0; pointer-events: none; transition: opacity var(--duration) var(--ease-out);
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
}
.lightbox.open { opacity: 1; pointer-events: auto; }
.lightbox-close {
  position: absolute; top: 24px; right: 24px; background: rgba(255,255,255,0.1);
  border: none; color: #fff; font-size: 2rem; width: 48px; height: 48px;
  border-radius: 50%; cursor: pointer; display: flex; align-items: center;
  justify-content: center; transition: background var(--duration-fast);
}
.lightbox-close:hover { background: rgba(255,255,255,0.2); }
.lightbox-img { max-width: 90vw; max-height: 80vh; border-radius: var(--radius-lg); object-fit: contain; }
.lightbox-cap { color: rgba(255,255,255,0.7); font-size: var(--text-sm); margin-top: 16px; }

/* Loading state */
.lightbox.loading .lightbox-img { opacity: 0.15; }
.lightbox.loading::after {
  content: ''; position: absolute; top: 50%; left: 50%; width: 42px; height: 42px;
  margin: -21px 0 0 -21px; border: 3px solid rgba(255,255,255,0.2);
  border-top-color: #fff; border-radius: 50%; animation: spin 0.8s linear infinite; z-index: 20;
}
@keyframes spin { to { transform: rotate(360deg); } }
body.lb-lock { overflow: hidden; }

/* ---------- Skeleton Screen Component ---------- */
.skeleton-box {
  background: linear-gradient(
    90deg,
    var(--bg-alt) 25%,
    var(--border-light) 50%,
    var(--bg-alt) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s var(--ease-in-out) infinite;
  border-radius: var(--radius-sm);
}
.skeleton-text { height: 14px; margin-bottom: 8px; border-radius: var(--radius-sm); }
.skeleton-text--lg { height: 24px; width: 60%; }
.skeleton-text--sm { height: 12px; width: 40%; }
.skeleton-card { padding: 24px; border-radius: var(--radius-lg); }
.skeleton-circle { width: 48px; height: 48px; border-radius: 50%; }
@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}
@media (prefers-reduced-motion: reduce) {
  .skeleton-box { animation: none; background: var(--bg-alt); }
}

/* 源 partial —— 由 scripts/split_css.py 从 style.css 切分；修改请编辑本目录文件，再运行 build_critical.py 重新生成 style.css */

/* ================================================================
   PRICING PAGE STYLES
   ================================================================ */

/* Benefit tags row */
.benefit-row {
  display: flex; gap: 12px; justify-content: center; flex-wrap: wrap;
  margin-bottom: 36px;
}
.benefit-tag {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: var(--text-sm); font-weight: 600; color: var(--emerald-dark);
  background: #ECFDF5; padding: 8px 16px; border-radius: var(--radius-pill);
}
.benefit-tag .ico { width: 18px; height: 18px; color: var(--emerald); }

/* Price grid — legacy .price-grid removed, use .price-grid-new */
.tier-note {
  font-size: var(--text-sm); color: var(--text-muted); margin-bottom: 24px;
  padding: 12px 16px; background: var(--bg-alt); border-radius: var(--radius-md);
}
.block-cta {
  text-align: center; margin: 16px 0 48px;
}
.block-cta a {
  font-size: var(--text-md); font-weight: 600; color: var(--brand);
  transition: color var(--duration-fast);
}
.block-cta a:hover { color: var(--brand-dark); }

/* Value blocks (选购系统 / 增值服务) */
.value-block { margin-top: 56px; padding-top: 40px; border-top: 1px solid var(--border); }
.block-h { font-weight: 700; margin-bottom: 24px; text-align: center; }
.value-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-bottom: 32px; }
.v-list { list-style: none; padding: 0; margin: 0; }
.v-list li {
  font-size: var(--text-md); color: var(--text-secondary); padding: 6px 0;
  border-bottom: 1px solid var(--border-light);
}
.v-list li:last-child { border-bottom: none; }
.scene { font-size: var(--text-sm); color: var(--text-muted); margin-bottom: 12px; line-height: var(--leading-normal); }

/* Rule grid */
.rule-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; margin-bottom: 24px; }
.rule {
  background: var(--bg-alt); border-radius: var(--radius-md); padding: 24px;
  border: 1px solid var(--border-light);
}
.rule h4 { font-size: var(--h4); margin-bottom: 12px; }
.rule ul { list-style: none; padding: 0; margin: 0; }
.rule li { font-size: var(--text-md); color: var(--text-secondary); padding: 5px 0; line-height: var(--leading-relaxed); }

/* Deploy grid */
.deploy-grid .card { text-align: left; }
.suit {
  display: block; font-size: var(--text-sm); color: var(--brand); font-weight: 600;
  margin-bottom: 10px;
}
.deploy-grid .card p { font-size: var(--text-sm); }

/* ================================================================
   TABLE STYLES
   ================================================================ */
.table-wrap {
  overflow-x: auto; -webkit-overflow-scrolling: touch;
  border-radius: var(--radius-md); border: 1px solid var(--border);
  margin-bottom: 18px;
}
.tbl {
  width: 100%; border-collapse: collapse; font-size: var(--text-sm);
  background: var(--white); min-width: 700px;
}
.tbl thead { background: var(--bg-soft); }
.tbl th {
  padding: 12px 14px; text-align: left; font-weight: 700; color: var(--text);
  border-bottom: 2px solid var(--border); font-size: var(--text-sm);
  white-space: nowrap;
}
.tbl td {
  padding: 10px 14px; border-bottom: 1px solid var(--border-light);
  color: var(--text-secondary); line-height: var(--leading-normal);
}
.tbl tbody tr:hover { background: var(--bg-soft); }
.tbl .m {
  background: var(--bg-soft); font-weight: 700; color: var(--text);
  font-size: var(--text-sm); border-bottom: 2px solid var(--border);
}
.tbl .yes { color: var(--emerald-dark); font-weight: 600; }
.tbl .no { color: var(--text-muted); }
/* 重新设计的对钩图标（替代原 √ 字符，更精致统一） */
.ck {
  display: inline-block;
  width: 16px; height: 16px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 256 256'%3E%3Cpath fill='%23059669' d='M229.66,77.66l-128,128a8,8,0,0,1-11.32,0l-56-56a8,8,0,0,1,11.32-11.32L96,188.69,218.34,66.34a8,8,0,0,1,11.32,11.32Z'/%3E%3C/svg%3E");
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
  vertical-align: -2px;
}

/* Plan column header colors — scannable differentiation */
.tbl .col-b { background: linear-gradient(180deg, #F8FAFC, #F1F5F9); color: #475569; border-bottom: 3px solid #CBD5E1; }
.tbl .col-s { background: linear-gradient(180deg, #E0F2FE, #BAE6FD); color: #0369A1; border-bottom: 3px solid #38BDF8; }
.tbl .col-p { background: linear-gradient(180deg, #D1FAE5, #A7F3D0); color: #047857; border-bottom: 3px solid #34D399; }
.tbl .col-d { background: linear-gradient(180deg, #E0E7FF, #C7D2FE); color: #4338CA; border-bottom: 3px solid #818CF8; }

/* Zebra striping for row readability */
.tbl tbody tr:nth-child(even) { background: rgba(241,245,249,0.5); }
.tbl tbody tr:nth-child(even):hover { background: var(--bg-soft); }
.tbl tbody tr:nth-child(odd):hover { background: var(--bg-soft); }

/* Stronger yes/no visual treatment */
.tbl .yes { color: #059669; font-weight: 700; font-size: var(--text-sm); }
.tbl .no  { color: #DC2626; font-weight: 600; }

/* Category header rows */
.tbl .m th, .tbl .m td { border-bottom-width: 2px; border-bottom-color: var(--border); }

/* ===== 对比表优化（P0 / P1 / P2） ===== */
/* P0-3: 不含项软化为浅灰 em dash，去掉红色警报感 */
.tbl .no  { color: var(--text-muted); font-weight: 400; }
/* P2-8: 合并后的首列「功能名 + 说明」排版 */
.tbl td:first-child { min-width: 180px; }
.tbl td:first-child .cell-sub { display: block; font-weight: 400; font-size: var(--text-xs); color: var(--text-muted); margin-top: 3px; line-height: var(--leading-snug); }
/* P2-9: 核心表下方迷你图例 */
.tbl-legend { text-align: center; font-size: var(--text-xs); color: var(--text-muted); margin: 12px 0 0; }
.tbl-legend .lg-yes { color: var(--emerald-dark); font-weight: 700; }
/* P1-5: 标准版「推荐」标签（与定价卡呼应） */
.th-reco { display: inline-block; margin-left: 6px; padding: 1px 7px; font-size: var(--text-xs); font-weight: 700; color: #fff; background: var(--brand); border-radius: 999px; vertical-align: middle; letter-spacing: .02em; white-space: nowrap; }
/* P2-10: 表头吸顶——限定对比区，子导航 z-index:90 位于其上方，互不遮挡 */
#compare .table-wrap { max-height: 78vh; overflow: auto; }

/* ================================================================
   FORM STYLES
   ================================================================ */
.field { margin-bottom: 16px; }
.field label {
  display: block; font-size: var(--text-sm); font-weight: 600; color: var(--text);
  margin-bottom: 6px;
}
.field input, .field textarea, .field select {
  width: 100%; padding: 10px 14px; border: 1px solid var(--border);
  border-radius: var(--radius-sm); font-size: var(--text-md); color: var(--text);
  background: var(--bg); transition: border-color var(--duration-fast), box-shadow var(--duration-fast);
  font-family: inherit;
}
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none; border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.1);
}
.field input::placeholder { color: var(--text-muted); }
.field input:disabled, .field textarea:disabled, .field select:disabled {
  background: var(--bg-alt); cursor: not-allowed; opacity: 0.6;
}
.field input[readonly], .field textarea[readonly] {
  background: var(--bg-alt); border-style: dashed; color: var(--text-secondary);
}

/* WeChat QR section */
.wx-qrs {
  display: flex; gap: 40px; justify-content: center; flex-wrap: wrap;
  padding-top: 12px;
}
.wx-qrs > div { text-align: center; }

/* ================================================================
   404 PAGE
   ================================================================ */
.notfound-section {
  padding: 100px 0; min-height: 60vh;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(180deg, #F0F9FF 0%, #FFFFFF 100%);
}
.notfound-code {
  font-size: clamp(5rem, 10vw, 8rem); font-weight: 800;
  background: linear-gradient(135deg, var(--brand), var(--cyan));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text; line-height: 1; margin-bottom: 8px;
}
.notfound-desc { font-size: 1.1rem; color: var(--text-secondary); margin-bottom: 32px; }
.notfound-title { margin: 8px 0 12px; }
.notfound-actions { justify-content: center; margin-top: 28px; }
.notfound-brand { margin-bottom: 14px; }
.notfound-brand-name { color: var(--white); }
.notfound-brand-sub { color: var(--text-on-dark-muted); }

/* ================================================================
   SCROLL ANIMATIONS
   ================================================================ */
.reveal {
  opacity: 0; transform: translateY(30px);
  transition: opacity var(--duration-slow) var(--ease-out), transform var(--duration-slow) var(--ease-out);
}
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ---------- Water Drop Decoration ---------- */
.water-drops { position: absolute; pointer-events: none; z-index: 0; }
.water-drop { position: absolute; border-radius: 50%; opacity: 0.08; }
.wd-1 { width: 120px; height: 120px; background: var(--brand); top: -40px; right: 10%; }
.wd-2 { width: 80px; height: 80px; background: var(--cyan); bottom: 10%; left: 5%; }
.wd-3 { width: 60px; height: 60px; background: var(--brand); top: 50%; left: 50%; }
.wd-4 { width: 40px; height: 40px; background: var(--cyan); bottom: 30%; right: 15%; }

/* ================================================================
   RESPONSIVE
   ================================================================ */
/* @critical */
@media (max-width: 1100px) {
  .stats-inner { grid-template-columns: repeat(2, 1fr); }
  .value-grid { grid-template-columns: 1fr; }
  .flow--steps .flow-node { min-width: 126px; padding: 30px 10px 20px; }
  .flow--steps .flow-node h3 { font-size: var(--h3-card); }
  .flow--steps .flow-node li { font-size: var(--text-md); }
  .flow--steps .flow-arrow { padding: 0 2px; font-size: 1.05rem; }
}

@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr; text-align: center; gap: 48px; }
  .hero-copy { max-width: 100%; }
  .hero-btns { justify-content: center; }
  .hero-trust { justify-content: center; }
  .hero-visual { order: -1; }
  .hero-visual::before { display: none; }
  .grid-3 { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-2 { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .solutions-grid { grid-template-columns: 1fr; }
  .testimonial-cards { grid-template-columns: 1fr; }
  .flow { flex-direction: column; align-items: center; }
  .flow-arrow { transform: rotate(90deg); padding: 12px 0; }
  .flow--steps { max-width: 560px; flex-direction: column; gap: 14px; }
  .flow--steps .flow-node {
    width: 100%; display: grid; grid-template-columns: 52px minmax(0, 1fr);
    column-gap: 18px; align-items: start; text-align: left; padding: 24px 20px;
  }
  .flow--steps .flow-node-icon { margin: 0; }
  .flow--steps .flow-node h3 { grid-column: 2; margin-bottom: 8px; }
  .flow--steps .flow-node ul { grid-column: 2; }
  .flow--steps .flow-node li { font-size: var(--text-md); line-height: var(--leading-loose); }
  .flow--steps .step-no { left: auto; right: 14px; top: 14px; }
  .flow--steps .flow-arrow { padding: 9px 0; font-size: 1.1rem; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); gap: 32px; }
  .section { padding: var(--section-gap-mobile) 0; }
  .section-soft { padding: var(--section-gap-mobile) 0; }
  .section-alt { padding: var(--section-gap-mobile) 0; }
  .rule-grid { grid-template-columns: 1fr; }
  .value-grid { grid-template-columns: 1fr; }
  .wx-qrs { flex-direction: column; align-items: center; gap: 24px; }
}

@media (max-width: 640px) {
  .stats-inner { grid-template-columns: 1fr 1fr; padding: 24px 20px; gap: 16px; }
  .stat-num { font-size: 1.6rem; }
  .grid-4 { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .hero { padding: 48px 0 64px; }
  .hero-btns { flex-direction: column; }
  .hero-btns .btn { width: 100%; }
  .float-cta { bottom: 20px; right: 16px; padding: 12px 20px; font-size: var(--text-sm); }
  .float-cta span { display: none; }
  .cta-btns { flex-direction: column; }
  .hero-sub { padding: 40px 0 50px; }
  .tbl { font-size: var(--text-xs); }
  .tbl th, .tbl td { padding: 8px 10px; }
}

/* ---------- Contact Page ---------- */
.contact-hero {
  position: relative; padding: 64px 0 80px; overflow: hidden;
  background: linear-gradient(180deg, #F0F9FF 0%, #FFFFFF 100%);
  color: var(--text); text-align: center;
}
.contact-hero::before {
  content: ''; position: absolute; top: -40%; right: -15%;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(6,182,212,0.08) 0%, transparent 70%);
  border-radius: 50%; pointer-events: none;
}
.contact-hero::after {
  content: ''; position: absolute; bottom: -25%; left: -10%;
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(2,132,199,0.06) 0%, transparent 70%);
  border-radius: 50%; pointer-events: none;
}
.contact-hero .eyebrow {
  background: rgba(2,132,199,0.08); color: var(--brand);
  border: none; position: relative; z-index: 1;
}
.contact-hero h1 {
  color: var(--text); font-size: var(--h1-page); font-weight: 700;
  letter-spacing: normal; line-height: var(--leading-tight); margin-bottom: 14px;
  position: relative; z-index: 1;
}
.contact-hero .lead {
  color: var(--text-secondary); font-size: 1.1rem; max-width: 580px;
  margin: 0 auto; line-height: var(--leading-relaxed); position: relative; z-index: 1;
}

/* @endcritical */
.contact-section { padding: 60px 0 90px; background: var(--bg); }
.contact-grid {
  display: grid; grid-template-columns: 1.15fr 1fr; gap: 36px;
  align-items: start;
}
.contact-form-card {
  background: var(--bg-card); border-radius: var(--radius-lg);
  border: 1px solid var(--border); padding: 36px 32px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.04);
}
.contact-form-card h2 {
  font-size: var(--h2-card); font-weight: 700; color: var(--text);
  margin-bottom: 4px;
}
.contact-form-card .form-desc {
  font-size: var(--text-sm); color: var(--text-secondary); margin-bottom: 24px;
}
.contact-form-card .btn-submit {
  width: 100%; padding: 14px 24px; font-size: 1rem; font-weight: 600;
  background: linear-gradient(135deg, var(--brand), #0353A4);
  color: #fff; border: none; border-radius: var(--radius-md);
  cursor: pointer; transition: all var(--duration-normal) var(--ease-out);
  box-shadow: 0 4px 14px rgba(2,132,199,0.25);
}
.contact-form-card .btn-submit:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(2,132,199,0.35);
}
.contact-form-card .btn-submit:disabled {
  opacity: 0.6; cursor: not-allowed; transform: none;
}
.contact-form-card .form-alt-link {
  text-align: center; margin-top: 16px;
}
.contact-form-card .form-alt-link a {
  color: var(--brand); font-weight: 500; font-size: var(--text-sm);
  text-decoration: none; transition: opacity var(--duration-fast);
}
.contact-form-card .form-alt-link a:hover { opacity: 0.8; }
.contact-trust {
  display: flex; align-items: center; justify-content: center;
  gap: 8px; margin-top: 20px; font-size: var(--text-xs); color: var(--text-muted);
}
.contact-trust svg { width: 14px; height: 14px; flex-shrink: 0; }

.contact-cards-col { display: flex; flex-direction: column; gap: 18px; }
.contact-card {
  background: var(--bg-card); border-radius: var(--radius-lg);
  border: 1px solid var(--border); padding: 24px 24px 22px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.03);
  transition: all var(--duration-normal) var(--ease-out);
}
.contact-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.06);
}
.contact-card-header {
  display: flex; align-items: center; gap: 14px; margin-bottom: 12px;
}
.contact-card-icon {
  width: 42px; height: 42px; border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.contact-card-icon.phone { background: #EBF3FC; color: var(--brand); }
.contact-card-icon.email { background: #ECFDF5; color: #059669; }
.contact-card-icon.address { background: #FFF7ED; color: #D97706; }
.contact-card-icon.wechat { background: #ECFDF5; color: #059669; }
.contact-card-icon svg { width: 22px; height: 22px; }
.contact-card-title {
  font-size: 1.05rem; font-weight: 700; color: var(--text);
}
.contact-card-body {
  font-size: var(--text-sm); color: var(--text-secondary); line-height: var(--leading-relaxed);
}
.contact-phone-num {
  font-size: 1.15rem; font-weight: 700; color: var(--brand);
  margin-bottom: 4px; letter-spacing: 0.02em;
}
.contact-card-body .hours {
  font-size: var(--text-xs); color: var(--text-muted); margin-top: 2px;
}

.qr-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 20px;
  margin-top: 6px;
}
.qr-item { text-align: center; }
.qr-item img {
  width: 120px; height: 120px; border-radius: var(--radius-md);
  border: 1px solid var(--border); display: block; margin: 0 auto 8px;
}
.qr-item span {
  font-size: var(--text-xs); color: var(--text-muted);
}

/* ---------- Responsive Contact ---------- */
@media (max-width: 980px) {
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .contact-hero { padding: 48px 0 56px; }
  .contact-section { padding: 40px 0 60px; }
  .qr-item img { width: 110px; height: 110px; }
}

/* ============================================================
   PRICING PAGE — Ardot Design Premium Styles
   ============================================================ */

:root {
  --pricing-brand: #0284C7;
  --pricing-dark: #0C4A6E;
  --pricing-warm: #F0F9FF;
  --pricing-glow: rgba(2,132,199,0.08);
  --pricing-card-shadow: 0 1px 2px rgba(15,23,42,0.04);
  --pricing-featured-shadow: 0 8px 30px rgba(2,132,199,0.15);
}

/* ---------- Price Hero ---------- */
.price-hero {
  background: linear-gradient(180deg, #F0F9FF 0%, #FFFFFF 100%);
  text-align: center;
  padding: 80px 20px 80px;
  position: relative;
  overflow: hidden;
}
.price-hero::before {
  content: "";
  position: absolute;
  top: -40%; right: -15%;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(6,182,212,0.08) 0%, transparent 70%);
  border-radius: 50%; pointer-events: none;
}
.price-hero::after {
  content: "";
  position: absolute;
  bottom: -25%; left: -10%;
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(2,132,199,0.06) 0%, transparent 70%);
  border-radius: 50%; pointer-events: none;
}
.price-hero-badge {
  display: inline-flex;
  align-items: center;
  background: rgba(2,132,199,0.08);
  color: var(--brand);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.04em;
  padding: 6px 18px;
  border-radius: 100px;
  margin-bottom: 24px;
  position: relative;
  z-index: 1;
}
.price-hero h1 {
  font-family: inherit;
  font-size: var(--h1-page);
  font-weight: 700;
  color: var(--text);
  letter-spacing: normal;
  margin: 0 0 16px;
  line-height: var(--leading-tight);
  position: relative;
  z-index: 1;
}
.price-hero-lead {
  font-family: inherit;
  font-size: clamp(0.9375rem, 2vw, 1.0625rem);
  color: var(--text-secondary);
  max-width: 620px;
  margin: 0 auto 28px;
  line-height: var(--leading-normal);
  position: relative;
  z-index: 1;
}
.price-hero-trust {
  display: flex;
  justify-content: center;
  gap: 28px;
  flex-wrap: wrap;
  position: relative;
  z-index: 1;
}
.price-hero-trust span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-secondary);
  font-family: inherit;
  font-size: var(--text-sm);
  font-weight: 500;
}
.price-hero-trust .ico { color: var(--emerald); flex-shrink: 0; }

/* ---------- Quick Match ---------- */
.quick-match {
  background: var(--pricing-warm);
  padding: 64px 20px 56px;
  text-align: center;
}
.match-label {
  font-family: inherit;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--pricing-brand);
  margin-bottom: 12px;
}
.match-title {
  font-family: inherit;
  font-size: clamp(1.375rem, 3.5vw, 2rem);
  font-weight: 700;
  color: var(--pricing-dark);
  letter-spacing: normal;
  margin: 0 auto 40px;
  max-width: 500px;
  line-height: var(--leading-tight);
}
.match-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  max-width: 820px;
  margin: 0 auto;
}
.match-card {
  background: #fff;
  border: 1px solid rgba(2,132,199,0.1);
  border-radius: 16px;
  padding: 28px 16px 24px;
  transition: box-shadow var(--duration-fast), border-color var(--duration-fast);
  cursor: default;
}
.match-card:hover { box-shadow: var(--pricing-card-shadow); }
.match-card.active {
  background: linear-gradient(135deg, var(--pricing-brand), var(--pricing-dark));
  border-color: transparent;
  box-shadow: var(--pricing-featured-shadow);
}
.match-card h4 {
  font-family: inherit;
  font-size: var(--h4);
  font-weight: 700;
  color: var(--pricing-dark);
  margin: 0 0 6px;
  letter-spacing: normal;
}
.match-card.active h4 { color: #fff; }
.match-card p {
  font-family: inherit;
  font-size: var(--text-xs);
  color: var(--text-muted);
  margin: 0;
}
.match-card.active p { color: rgba(255,255,255,0.8); }

/* ---------- Pricing Section ---------- */
.pricing-section {
  background: #fff;
  padding: 72px 20px 64px;
  text-align: center;
}
.pricing-label {
  font-family: inherit;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--pricing-brand);
  margin-bottom: 12px;
}
.pricing-title {
  font-family: inherit;
  font-size: clamp(1.625rem, 4vw, 2.375rem);
  font-weight: 700;
  color: var(--pricing-dark);
  letter-spacing: normal;
  margin: 0 0 12px;
  line-height: var(--leading-tight);
}
.pricing-sub {
  font-family: inherit;
  font-size: var(--text-md);
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto 48px;
  line-height: var(--leading-normal);
}

/* Price Grid — 5-column cards */
.price-grid-new {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  max-width: 1200px;
  margin: 0 auto;
}

.price-card-new {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 36px 20px 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  box-shadow: var(--pricing-card-shadow);
  transition: transform var(--duration-normal), box-shadow var(--duration-normal);
  position: relative;
}
.price-card-new:hover {
  transform: translateY(-4px);
  box-shadow: 0 4px 32px rgba(2,132,199,0.1);
}

/* Featured card */
.price-card-new.featured {
  border: 2px solid var(--pricing-brand);
  box-shadow: var(--pricing-featured-shadow);
  position: relative;
  z-index: 1;
  background: linear-gradient(180deg, rgba(2,132,199,0.03) 0%, #fff 20%);
}
.hot-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: linear-gradient(135deg, var(--pricing-brand), var(--pricing-dark));
  color: #fff;
  font-family: inherit;
  font-size: var(--text-xs);
  font-weight: 700;
  padding: 5px 14px;
  border-radius: 100px;
  margin-bottom: 20px;
  letter-spacing: 0.03em;
}

.tier-name-new {
  font-family: inherit;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--pricing-dark);
  margin: 0 0 6px;
  letter-spacing: normal;
}
.scale-new {
  font-family: inherit;
  font-size: var(--text-xs);
  color: var(--text-muted);
  font-weight: 500;
  margin-bottom: 28px;
}

/* Price display */
.price-display { margin-bottom: 8px; }
.price-cur {
  font-family: inherit;
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--pricing-dark);
  vertical-align: top;
  line-height: 1;
}
.price-num {
  font-family: inherit;
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--pricing-dark);
  letter-spacing: normal;
  font-variant-numeric: tabular-nums;
  line-height: 1;
}
.price-card-new.featured .price-num,
.price-card-new.featured .price-cur { color: var(--pricing-brand); }

.price-original {
  font-family: inherit;
  font-size: var(--text-xs);
  color: var(--text-muted);
  text-decoration: line-through;
  margin: 0 0 4px;
}
.price-maint {
  font-family: inherit;
  font-size: var(--text-xs);
  color: var(--text-muted);
  margin: 0 0 24px;
}
.price-btn {
  display: inline-block;
  width: 100%;
  padding: 12px 16px;
  border-radius: 12px;
  font-family: inherit;
  font-size: var(--text-md);
  font-weight: 600;
  text-align: center;
  text-decoration: none;
  border: 1px solid rgba(2,132,199,0.2);
  color: var(--pricing-brand);
  background: #fff;
  transition: background var(--duration-fast), color var(--duration-fast), border-color var(--duration-fast);
  margin-top: auto;
}
.price-btn:hover { background: rgba(2,132,199,0.05); border-color: var(--pricing-brand); }
.price-btn-primary {
  background: var(--pricing-brand);
  color: #fff;
  border-color: var(--pricing-brand);
}
.price-btn-primary:hover { background: var(--pricing-dark); border-color: var(--pricing-dark); color: #fff; }

/* Feature Highlights Bar */
.feature-highlights {
  display: flex;
  justify-content: center;
  gap: 36px;
  flex-wrap: wrap;
  margin-top: 36px;
}
.feature-highlights span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: inherit;
  font-size: var(--text-sm);
  color: var(--pricing-dark);
  font-weight: 500;
}
.feature-highlights svg { color: var(--pricing-brand); flex-shrink: 0; }

/* Conversion Note */
.conversion-note {
  margin-top: 24px;
  font-family: inherit;
  font-size: var(--text-md);
}
.conversion-note a {
  color: var(--pricing-brand);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px dashed rgba(2,132,199,0.3);
  transition: border-color var(--duration-fast);
}
.conversion-note a:hover { border-color: var(--pricing-brand); }
.conversion-arrow {
  display: inline-block;
  margin-left: 6px;
  color: var(--pricing-brand);
  transition: transform var(--duration-fast);
}
.conversion-note a:hover + .conversion-arrow,
.conversion-note a:hover ~ .conversion-arrow { transform: translateX(4px); }

/* ---------- Trust Section ---------- */
.trust-section {
  background: #fff;
  padding: 72px 20px 72px;
  text-align: center;
  border-top: 1px solid var(--border);
}
.trust-label {
  font-family: inherit;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--pricing-brand);
  margin-bottom: 12px;
}
.trust-title {
  font-family: inherit;
  font-size: clamp(1.5rem, 3.5vw, 2.25rem);
  font-weight: 700;
  color: var(--pricing-dark);
  letter-spacing: normal;
  margin: 0 0 12px;
  line-height: var(--leading-tight);
}
.trust-sub {
  font-family: inherit;
  font-size: var(--text-md);
  color: var(--text-muted);
  max-width: 480px;
  margin: 0 auto 48px;
}
.trust-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 820px;
  margin: 0 auto;
}
.trust-card {
  background: var(--pricing-warm);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 36px 24px 32px;
  text-align: center;
  transition: box-shadow var(--duration-fast);
}
.trust-card:hover { box-shadow: var(--pricing-card-shadow); }
.trust-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--pricing-brand), var(--pricing-dark));
  color: #fff;
  margin-bottom: 20px;
}
.trust-card h4 {
  font-family: inherit;
  font-size: var(--h4);
  font-weight: 700;
  color: var(--pricing-dark);
  margin: 0 0 10px;
  letter-spacing: normal;
}
.trust-card p {
  font-family: inherit;
  font-size: var(--text-sm);
  color: var(--text-muted);
  margin: 0;
  line-height: var(--leading-normal);
}

/* ---------- Final CTA ---------- */
.final-cta {
  background: linear-gradient(180deg, #F0F9FF 0%, #FFFFFF 100%);
  text-align: center;
  padding: 80px 20px 80px;
  position: relative;
  overflow: hidden;
  border-top: 1px solid var(--border);
}
.final-cta::before {
  content: "";
  position: absolute;
  top: -30%; right: -15%;
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(6,182,212,0.06) 0%, transparent 70%);
  border-radius: 50%; pointer-events: none;
}
.final-cta h2 {
  font-family: inherit;
  font-size: var(--h2);
  font-weight: 700;
  color: var(--text);
  letter-spacing: normal;
  margin: 0 0 12px;
  line-height: var(--leading-tight);
  position: relative;
  z-index: 1;
}
.final-cta p {
  font-family: inherit;
  font-size: 1rem;
  color: var(--text-secondary);
  margin: 0 0 32px;
  position: relative;
  z-index: 1;
}
.final-cta .btn {
  position: relative;
  z-index: 1;
}

/* ---------- FAQ ---------- */
.faq-list { margin-top: 24px; }
.faq-item {
  border: 1px solid var(--border);
  border-radius: 14px;
  margin-bottom: 10px;
  background: #fff;
  overflow: hidden;
  transition: border-color var(--duration-fast);
}
.faq-item[open] { border-color: var(--brand); }
.faq-item summary {
  font-family: inherit;
  font-size: var(--text-md);
  font-weight: 600;
  color: var(--pricing-dark);
  padding: 18px 24px;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
  letter-spacing: normal;
}
.faq-item summary::-webkit-details-marker { display: none; }
/* Animated plus → minus icon (GPU-accelerated transform/opacity) */
.faq-icon {
  position: relative; flex-shrink: 0; margin-left: 12px;
  width: 18px; height: 18px;
}
.faq-icon::before, .faq-icon::after {
  content: ""; position: absolute;
  background: var(--pricing-brand);
  border-radius: 2px;
  transition: transform var(--duration-normal) var(--ease-in-out), opacity var(--duration-normal) var(--ease-in-out);
}
.faq-icon::before { /* horizontal bar */
  top: 50%; left: 2px; right: 2px; height: 2px;
  transform: translateY(-50%);
}
.faq-icon::after { /* vertical bar */
  left: 50%; top: 2px; bottom: 2px; width: 2px;
  transform: translateX(-50%);
}
.faq-item[open] .faq-icon::after {
  transform: translateX(-50%) scaleY(0);
  opacity: 0;
}
/* Smooth height transition via grid-template-rows (both directions, precise) */
.faq-item .faq-answer {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--duration-normal) var(--ease-in-out);
}
.faq-item[open] .faq-answer { grid-template-rows: 1fr; }
.faq-answer-inner {
  overflow: hidden; min-height: 0;
  opacity: 0;
  transition: opacity var(--duration-fast) var(--ease-in-out);
}
.faq-item[open] .faq-answer-inner { opacity: 1; }
.faq-item p {
  font-family: inherit;
  font-size: var(--text-md);
  color: var(--text-muted);
  padding: 0 24px 20px;
  margin: 0;
  line-height: var(--leading-normal);
}

/* ============================================================
   PRICING PAGE — Responsive
   ============================================================ */

@media (max-width: 1100px) {
  .price-grid-new { grid-template-columns: repeat(2, 1fr); max-width: 600px; }
  .match-cards { grid-template-columns: repeat(2, 1fr); max-width: 520px; }
  .trust-cards { grid-template-columns: repeat(3, 1fr); max-width: 720px; gap: 16px; }
}

@media (max-width: 980px) {
  .price-hero { padding: 72px 20px 56px; }
  .price-hero h1 { font-size: clamp(1.625rem, 6vw, 2.25rem); }
  .price-grid-new { grid-template-columns: repeat(2, 1fr); max-width: 540px; gap: 14px; }
  .match-cards { grid-template-columns: repeat(2, 1fr); max-width: 460px; }
  .trust-cards { grid-template-columns: 1fr; max-width: 380px; }
  .feature-highlights { gap: 20px; }
}

@media (max-width: 640px) {
  .price-hero { padding: 56px 16px 40px; }
  .price-hero-trust { gap: 16px; }
  .price-hero-trust span { font-size: var(--text-sm); }
  .quick-match { padding: 48px 16px 40px; }
  .match-cards { grid-template-columns: 1fr; max-width: 280px; }
  .pricing-section { padding: 48px 16px 40px; }
  .price-grid-new { grid-template-columns: 1fr; max-width: 340px; gap: 16px; }
  .price-card-new { padding: 28px 16px 24px; border-radius: 28px; }
  .price-card-new.featured { border-radius: 28px; }
  .price-num { font-size: 2rem; }
  .trust-section { padding: 48px 16px 48px; }
  .trust-cards { gap: 14px; }
  .final-cta { padding: 48px 16px 44px; }
  .faq-item summary { padding: 16px 18px; font-size: var(--text-sm); }
  .faq-item p { padding: 0 18px 16px; font-size: var(--text-md); }
}

/* ---------- Pricing Sub Nav (sticky section tabs) ---------- */
.pricing-subnav {
  position: sticky;
  top: var(--header-h);
  z-index: 90;
  background: rgba(255,255,255,0.88);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--border);
}
.pricing-subnav .container {
  display: flex;
  justify-content: center;
  gap: 6px;
  flex-wrap: wrap;
  padding: 9px 16px;
}
.pricing-subnav .sub-link {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-muted);
  padding: 7px 18px;
  border-radius: 100px;
  text-decoration: none;
  transition: color .2s, background .2s;
  white-space: nowrap;
}
.pricing-subnav .sub-link:hover { color: var(--brand); background: var(--brand-light); }
.pricing-subnav .sub-link.active { color: #fff; background: var(--brand); }

/* ---------- Card Features List ---------- */
.card-features {
  list-style: none;
  padding: 0;
  margin: 0 0 20px;
  text-align: left;
  width: 100%;
}
.card-features li {
  display: flex;
  align-items: center;
  gap: 7px;
  font-family: inherit;
  font-size: var(--text-xs);
  color: var(--text-color);
  padding: 5px 0;
  line-height: var(--leading-normal);
}
.card-features li svg { flex-shrink: 0; color: var(--brand); opacity: .85; }

/* Buyout & savings tags */
.buyout-tag {
  display: inline-block;
  font-weight: 400;
  color: var(--brand);
  font-size: var(--text-xs);
  margin-left: 2px;
}
.save-tag {
  display: inline-block;
  background: rgba(2,132,199,0.08);
  color: var(--brand);
  font-size: var(--text-xs);
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 6px;
  margin-left: 6px;
  vertical-align: middle;
}

/* Comparison table: visually distinguish 定制版 (always-included) column */
.tbl [data-col="d"] { background: rgba(99,102,241,0.06); }
.tbl thead .col-d {
  background: linear-gradient(180deg, #E9EAFD, #F6F6FE);
  border-bottom: 3px solid rgba(99,102,241,0.4);
}
.tbl [data-col="d"] { font-weight: 600; color: var(--brand); }

/* Enhanced comparison table: zebra stripes & module headers */
.tbl tbody tr:nth-child(even):not(:has(.m)) td { background: rgba(2,132,199,0.02); }
.tbl .m {
  background: rgba(2,132,199,0.06);
  font-weight: 700;
  font-size: var(--text-sm);
  letter-spacing: .02em;
  color: var(--pricing-dark);
  border-bottom: 2px solid rgba(2,132,199,0.15);
  padding: 14px 16px;
}
/* Sticky first column (feature name) on scroll — fully opaque to prevent bleed-through from scrolled columns */
.tbl td:first-child,
.tbl th:first-child {
  position: sticky;
  left: 0;
  background: #fff;
  z-index: 10;
  font-weight: 600;
  min-width: 120px;
  box-shadow: 4px 0 8px rgba(0,0,0,0.04);
}
/* Category header first cell — opaque solid (was semi-transparent, caused 定制版 bleed-through) */
.tbl .m:first-child { background: #E8F4FC; z-index: 11; }
/* Top-left corner cell — highest priority, sits above both sticky axes */
.tbl thead th:first-child { background: #fff; z-index: 20; }

/* Sticky header row — z-index above all body cells but below sub-nav (z-index:90) */
.tbl thead th { position: sticky; top: 0; z-index: 15; background: var(--bg-soft); }

/* Anchor offset so sticky header + subnav don't cover section tops */
#pricing, #compare, #buy, #faq { scroll-margin-top: calc(var(--header-h) + 56px); }

@media (max-width: 640px) {
  .pricing-subnav .container { justify-content: flex-start; flex-wrap: nowrap; overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .pricing-subnav .sub-link { flex: 0 0 auto; }
}

/* ---------- Comparison table: horizontal scroll container (P0-2) ---------- */
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; max-width: 100%; }

/* @critical */
/* ---------- Mobile Nav Overlay (P2-10) ---------- */
.nav-overlay {
  position: fixed; inset: 0;
  background: rgba(15, 23, 42, 0.45);
  opacity: 0; visibility: hidden;
  transition: opacity var(--duration-normal) var(--ease-in-out), visibility var(--duration-normal);
  z-index: 99;
}
.nav-overlay.show { opacity: 1; visibility: visible; }
body.nav-open { overflow: hidden; }
@media (min-width: 901px) { .nav-overlay { display: none; } }

/* @endcritical */
/* ---------- Back to Top (P2-7) ---------- */
.back-to-top {
  position: fixed; left: 20px; bottom: 20px; z-index: 90;
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--brand); color: #fff; border: none; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  box-shadow: var(--shadow-lg);
  opacity: 0; visibility: hidden; transform: translateY(12px);
  transition: opacity var(--duration-normal) var(--ease-out), transform var(--duration-normal) var(--ease-out), visibility var(--duration-normal), background var(--duration-fast);
}
.back-to-top svg { width: 22px; height: 22px; }
.back-to-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { background: #0369A1; }

/* ---------- Comparison table scroll hint (P0-2) ---------- */
.tbl-scroll-hint {
  display: none;
  text-align: center; font-size: var(--text-xs); color: var(--text-muted);
  margin: 10px 0 0;
}

/* ---------- Mobile refinements (P0-2 / P0-3 / P1-5 / P2-13) ---------- */
@media (max-width: 640px) {
  .tbl td:first-child, .tbl th:first-child { min-width: 110px; }
  .tbl-scroll-hint { display: block; }
  /* Mobile table: enhance readability with wider first column and visual cues */
  .tbl { min-width: 600px; }
  .tbl th, .tbl td { padding: 10px 12px; }
  .tbl .cell-sub { font-size: var(--text-xs); }
  /* Column header badges more prominent on mobile */
  .tbl thead th { font-size: var(--text-sm); padding: 14px 12px; }
  /* Category headers more visible */
  .tbl .m { padding: 16px 12px; font-size: var(--text-sm); }
}
@media (max-width: 480px) {
  .hero-title { font-size: 1.85rem; line-height: var(--leading-snug); letter-spacing: normal; }
  .hero-desc { font-size: 1rem; }
  .price-grid-new { gap: 12px; max-width: 360px; margin-left: auto; margin-right: auto; }
  .price-card-new { padding: 22px 18px 20px; }
  .qr-item img { width: 140px; height: 140px; }
}

/* ---------- Print ---------- */
@media print {
  .site-header, .float-cta, .hamburger, .pricing-subnav { display: none !important; }
  .hero { padding: 20px 0; }
}

/* ================================================================
   ACCESSIBILITY ENHANCEMENTS
   ================================================================ */

/* Skip Link — keyboard users can bypass navigation */
.skip-link {
  position: absolute; top: -100px; left: 0; z-index: 999;
  background: var(--brand); color: #fff; padding: 12px 24px;
  font-size: var(--text-sm); font-weight: 600; text-decoration: none;
  border-radius: 0 0 var(--radius-md) 0; transition: top var(--duration-fast) var(--ease-out);
}
.skip-link:focus { top: 0; color: #fff; }

/* Global focus-visible styles for keyboard navigation */
:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 2px;
  border-radius: 4px;
}
.btn:focus-visible,
.btn-submit:focus-visible,
.lightbox-close:focus-visible,
.back-to-top:focus-visible,
.hamburger:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 3px;
}

/* Hamburger ARIA state */
.hamburger[aria-expanded="true"] span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.hamburger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.hamburger[aria-expanded="true"] span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

/* Global reduced-motion support */
/* @critical */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1 !important; transform: none !important; }
  .card:hover, .feature-card:hover, .solution-card:hover,
  .price-card-new:hover, .flow-node:hover, .contact-card:hover,
  .browser-mockup:hover,   .btn:hover, .btn-submit:hover {
    transform: none !important;
  }
}
/* @endcritical */

/* ================================================================
   BREADCRUMB NAVIGATION
   ================================================================ */
.breadcrumb {
  padding: 12px 0 0;
}
.breadcrumb ol {
  list-style: none; display: flex; flex-wrap: wrap;
  align-items: center; gap: 0; padding: 0; margin: 0;
}
.breadcrumb li {
  display: flex; align-items: center; gap: 8px;
  font-size: var(--text-sm); color: var(--text-muted);
}
.breadcrumb li:not(:last-child)::after {
  content: '/';
  margin: 0 8px;
  color: var(--text-muted);
  opacity: 0.5;
}
.breadcrumb a {
  color: var(--text-secondary); text-decoration: none;
  transition: color var(--duration-fast);
}
.breadcrumb a:hover { color: var(--brand); }
.breadcrumb [aria-current="page"] {
  color: var(--text); font-weight: 600;
}

/* ================================================================
   FORM VALIDATION ENHANCEMENTS
   ================================================================ */
.field input:focus:invalid,
.field textarea:focus:invalid,
.field select:focus:invalid {
  border-color: var(--red);
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}
.field input:valid:not(:placeholder-shown),
.field textarea:valid:not(:placeholder-shown) {
  border-color: var(--emerald);
}
.field-error {
  display: none; font-size: var(--text-xs); color: var(--red);
  margin-top: 4px; font-weight: 500;
}
.field.has-error .field-error { display: block; }
.field.has-error input,
.field.has-error textarea { border-color: var(--red); }
.req { color: var(--red); margin-left: 2px; }

/* Form message live region */
.form-msg[role="status"] {
  padding: 10px 16px; border-radius: var(--radius-sm);
  font-weight: 500;
}

/* ================================================================
   TABLE SCROLL SHADOW
   ================================================================ */
.table-wrap--scroll {
  position: relative;
  background:
    linear-gradient(to right, var(--white) 30%, rgba(255,255,255,0)) 0 0,
    linear-gradient(to right, rgba(255,255,255,0), var(--white) 70%) 100% 0,
    radial-gradient(farthest-side at 0 0, rgba(15,23,42,0.08), transparent) 0 0,
    radial-gradient(farthest-side at 100% 0, rgba(15,23,42,0.08), transparent) 100% 0;
  background-repeat: no-repeat;
  background-size: 40px 100%, 40px 100%, 14px 100%, 14px 100%;
  background-attachment: local, local, scroll, scroll;
}
.table-wrap--scroll .tbl td:first-child,
.table-wrap--scroll .tbl th:first-child {
  position: sticky; left: 0;
  background: var(--white);
  z-index: 1;
}
.table-wrap--scroll .tbl th:first-child {
  background: var(--bg-soft);
  z-index: 2;
}
.table-wrap--scroll .tbl tbody tr:nth-child(even) td:first-child {
  background: rgba(241,245,249,0.9);
}
.table-wrap--scroll .tbl tbody tr:hover td:first-child {
  background: var(--bg-soft);
}

/* ================================================================
   LIGHTBOX KEYBOARD HINT
   ================================================================ */
.lightbox-hint {
  color: rgba(255,255,255,0.5); font-size: var(--text-xs);
  margin-top: 8px; text-align: center;
}

/* ================================================================
   ADDITIONAL RESPONSIVE BREAKPOINTS
   ================================================================ */
@media (max-width: 1024px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .solutions-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1.5fr 1fr 1fr; gap: 32px; }
  .footer-grid .footer-col:last-child { grid-column: 1 / -1; }
}

@media (min-width: 901px) {
  .breadcrumb-mobile { display: none; }
}

/* ================================================================
   UTILITY CLASSES (replace inline styles)
   ================================================================ */
.mt-4 { margin-top: var(--space-4); }
.mt-5 { margin-top: var(--space-5); }
.mt-6 { margin-top: var(--space-6); }
.mt-7 { margin-top: var(--space-7); }
.mb-5 { margin-bottom: var(--space-5); }

/* Footer brand link (replaces inline color/margin styles) */
.footer-brand-link {
  color: #fff;
  margin-bottom: 14px;
}
.footer-brand-link .logo-img {
  background: #fff;
  padding: 2px;
}
.footer-brand-name {
  color: #fff;
}
.footer-brand-sub {
  color: var(--text-on-dark-muted);
}

/* CTA secondary button on dark background */
.cta-btn-secondary {
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.25);
}
.cta-btn-secondary:hover {
  background: rgba(255, 255, 255, 0.25);
}

/* Honeypot field (hidden from users, visible to bots) */
.honeypot-field {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

/* Form message (hidden by default, shown via JS) */
.form-msg {
  display: none;
  margin-top: 12px;
  font-size: var(--text-sm);
  text-align: center;
}

/* FAQ narrow container */
.faq-narrow {
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

/* Featured tier label */
.tier-featured-label {
  font-weight: 600;
  color: var(--brand);
}

/* Main content skip target */
main#main-content:focus {
  outline: none;
}

/* ================================================================
   BRAND MICRO-INTERACTIONS
   ================================================================ */

/* Water ripple click effect for primary buttons */
.btn-primary, .btn-submit, .price-btn-primary {
  position: relative;
  overflow: hidden;
}
.btn-primary::after, .btn-submit::after, .price-btn-primary::after {
  content: '';
  position: absolute;
  top: 50%; left: 50%;
  width: 0; height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transform: translate(-50%, -50%);
  transition: width var(--duration-slow) var(--ease-out), height var(--duration-slow) var(--ease-out), opacity var(--duration-slow) var(--ease-out);
  opacity: 0;
  pointer-events: none;
}
.btn-primary:active::after, .btn-submit:active::after, .price-btn-primary:active::after {
  width: 300px; height: 300px;
  opacity: 0;
  transition: 0s;
}

/* Scroll reveal stagger — auto-applies to grid children */
.grid-3 > .reveal:nth-child(1), .features-grid > .reveal:nth-child(1) { transition-delay: 0ms; }
.grid-3 > .reveal:nth-child(2), .features-grid > .reveal:nth-child(2) { transition-delay: 80ms; }
.grid-3 > .reveal:nth-child(3), .features-grid > .reveal:nth-child(3) { transition-delay: 160ms; }
.grid-3 > .reveal:nth-child(4), .features-grid > .reveal:nth-child(4) { transition-delay: 240ms; }
.grid-3 > .reveal:nth-child(5), .features-grid > .reveal:nth-child(5) { transition-delay: 320ms; }
.grid-3 > .reveal:nth-child(6), .features-grid > .reveal:nth-child(6) { transition-delay: 400ms; }
.grid-4 > .reveal:nth-child(1) { transition-delay: 0ms; }
.grid-4 > .reveal:nth-child(2) { transition-delay: 70ms; }
.grid-4 > .reveal:nth-child(3) { transition-delay: 140ms; }
.grid-4 > .reveal:nth-child(4) { transition-delay: 210ms; }

/* Card hover lift with brand-colored glow */
.card:hover, .solution-card:hover, .feature-card:hover {
  border-color: var(--brand-light);
}

/* Number font for price/stat displays */
.price-num, .price-cur, .stat-num {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
}

/* Icon micro-interaction on card hover */
.card:hover .card-icon, .feature-card:hover .feature-icon {
  transform: scale(1.08);
  transition: transform var(--duration) var(--ease-out);
}

/* Link underline animation */
.nav-links a, .footer-col a, .footer-grid a {
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute; bottom: 4px; left: 14px; right: 14px;
  height: 2px; background: var(--brand);
  transform: scaleX(0); transform-origin: left;
  transition: transform var(--duration-fast) var(--ease-out);
}
.nav-links a:hover::after, .nav-links a.active::after {
  transform: scaleX(1);
}

@media (prefers-reduced-motion: reduce) {
  .btn-primary::after, .btn-submit::after, .price-btn-primary::after { display: none; }
  .grid-3 > .reveal, .features-grid > .reveal, .grid-4 > .reveal { transition-delay: 0ms !important; }
  .card:hover .card-icon, .feature-card:hover .feature-icon { transform: none; }
  .nav-links a::after { display: none; }
}

/* Card image onload fallback (solutions page) */
.card-img img {
  width: 100%;
  height: auto;
}