/* =============================================================
 * 大货通 DHT · 公司介绍单页站 · 主题变量
 * 设计风格：清新·食品·绿色系 （深森绿 #1B6E3E → 翠绿 #10B981 → 嫩绿 #34D399）
 * ============================================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --brand-green:      #1B6E3E;   /* 主色：深森绿 - 标题、按钮、强调 */
  --brand-green-2:    #10B981;   /* 辅色：翠绿   - 渐变、图标、强调 2 */
  --brand-green-3:    #34D399;   /* 亮色：嫩绿   - 渐变高光、背景装饰 */
  --brand-green-soft: #D1FAE5;   /* 软色：淡绿   - 标签、眉标、浅背景 */
  --ink-1: #0F1F1A;
  --ink-2: #1E3A32;
  --ink-3: #3C6658;
  --ink-4: #6B8F81;
  --line:  #E2EDE6;
  --bg-1:  #FFFFFF;
  --bg-2:  #F5FBF7;
  --bg-3:  #E8F6EE;
  --white: #FFFFFF;
  --radius-s: 8px;
  --radius-m: 14px;
  --radius-l: 22px;
  --radius-xl: 32px;
  --shadow-sm: 0 2px 8px rgba(15,31,26,.06);
  --shadow-md: 0 8px 24px rgba(15,31,26,.10);
  --shadow-lg: 0 24px 60px -12px rgba(27,110,62,.28);
  --shadow-green: 0 18px 40px -14px rgba(16,185,129,.55);
  --container: 1200px;
  --space-section: 120px;
  --transition: 260ms cubic-bezier(.4,.2,.2,1);

  --font-cn: "Noto Sans SC","PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,sans-serif;
  --font-en: "Poppins","Plus Jakarta Sans",system-ui,Helvetica,Arial,sans-serif;
}
html { scroll-behavior: smooth; }
html, body {
  font-family: var(--font-cn);
  font-size: 16px;
  line-height: 1.65;
  color: var(--ink-2);
  background: var(--bg-1);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: 0; background: transparent; color: inherit; }
:focus-visible { outline: 3px solid var(--brand-green-3); outline-offset: 2px; border-radius: 6px; }
::selection { background: var(--brand-green-2); color: #fff; }

/* ===== 通用容器 ===== */
.container { max-width: var(--container); margin: 0 auto; padding: 0 32px; }
.section { padding: var(--space-section) 0; position: relative; }
.section-head { margin-bottom: 64px; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px; border-radius: 999px;
  background: var(--brand-green-soft);
  color: #1B6E3E; font-weight: 600; font-size: 13px;
  letter-spacing: .02em;
}
.eyebrow::before {
  content: ""; width: 6px; height: 6px; border-radius: 50%;
  background: var(--brand-green-2);
  box-shadow: 0 0 0 4px rgba(16,185,129,.18);
}
.h1, .h2, .h3 { font-family: var(--font-cn); color: var(--ink-1); line-height: 1.2; letter-spacing: -.02em; }
.h1 { font-size: clamp(32px, 5vw, 58px); font-weight: 900; }
.h2 { font-size: clamp(28px, 3.4vw, 42px); font-weight: 800; }
.h3 { font-size: 20px; font-weight: 700; }
.h2 strong { color: var(--brand-green); }
.lead { font-size: 17px; color: var(--ink-3); line-height: 1.85; }

/* ===== 装饰底纹：网格 + 噪点（纯 CSS/SVG data-uri） ===== */
.bg-grid {
  background-image:
    linear-gradient(to right, rgba(27,110,62,.055) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(27,110,62,.055) 1px, transparent 1px);
  background-size: 48px 48px;
}
.bg-noise {
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='220' height='220'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 .11 0 0 0 0 .34 0 0 0 0 .63 0 0 0 .45 0'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
  background-blend-mode: overlay;
  mix-blend-mode: multiply;
  opacity: .35;
}
.diagonal-cut-top::before,
.diagonal-cut-bottom::after {
  content: ""; position: absolute; left: 0; right: 0; height: 80px;
  background: inherit; z-index: 2; pointer-events: none;
}
.diagonal-cut-top::before { top: -1px; transform: skewY(-1.8deg); transform-origin: top left; }
.diagonal-cut-bottom::after { bottom: -1px; transform: skewY(-1.8deg); transform-origin: bottom right; }

/* ===== 按钮系统 ===== */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 26px; border-radius: 999px;
  font-weight: 700; font-size: 15px; letter-spacing: .01em;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition);
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--brand-green-2) 0%, var(--brand-green-3) 100%);
  color: #fff;
  box-shadow: var(--shadow-green);
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 24px 56px -16px rgba(16,185,129,.7); }
.btn-ghost {
  background: rgba(255,255,255,.85);
  color: var(--brand-green);
  border: 1.5px solid rgba(27,110,62,.14);
  backdrop-filter: blur(6px);
}
.btn-ghost:hover { background: var(--brand-green); color: #fff; transform: translateY(-3px); box-shadow: var(--shadow-md); }
.btn-ghost svg { transition: transform var(--transition); }
.btn-ghost:hover svg { transform: translateX(4px); }

.icon-btn {
  width: 44px; height: 44px; border-radius: 12px;
  display: inline-flex; align-items: center; justify-content: center;
  background: rgba(255,255,255,.85);
  border: 1px solid var(--line);
  color: var(--ink-2);
  transition: all var(--transition);
}
.icon-btn:hover { background: var(--brand-green); color: #fff; border-color: var(--brand-green); transform: translateY(-2px); }

/* ===== Navbar 扫码按钮 hover 弹出二维码 ===== */
.nav-cta { position: relative; display: inline-flex; align-items: center; gap: 10px; }
.nav-qr-pop {
  position: absolute; top: calc(100% + 14px); right: 0;
  width: 240px; padding: 18px;
  background: #fff; border-radius: 18px;
  box-shadow: 0 24px 60px -18px rgba(15,23,42,.32);
  border: 1px solid var(--line);
  opacity: 0; transform: translateY(-8px) scale(.96);
  pointer-events: none; transition: all 260ms cubic-bezier(.2,.8,.2,1);
  z-index: 60; text-align: center;
}
.nav-cta:hover .nav-qr-pop,
.nav-cta:focus-within .nav-qr-pop { opacity: 1; transform: translateY(0) scale(1); pointer-events: auto; }
.nav-qr-pop::before {
  content: ""; position: absolute; top: -8px; right: 36px;
  width: 16px; height: 16px; background: #fff;
  transform: rotate(45deg); border-top: 1px solid var(--line); border-left: 1px solid var(--line);
}
.nav-qr-pop .qr-img {
  width: 100%; aspect-ratio: 1/1; border-radius: 12px; overflow: hidden;
  background: #fff; padding: 6px; border: 1px solid var(--line); margin-bottom: 10px;
}
.nav-qr-pop .qr-img svg, .nav-qr-pop .qr-img img { width: 100%; height: 100%; }
.nav-qr-pop p { font-size: 12.5px; color: var(--ink-3); font-weight: 500; line-height: 1.5; }
.nav-qr-pop p b { color: var(--brand-green); }

/* ===== Reveal 入场动画 ===== */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .8s ease, transform .8s cubic-bezier(.2,.8,.2,1); }
.reveal.is-in { opacity: 1; transform: translateY(0); }
.reveal-stagger > * { opacity: 0; transform: translateY(22px); transition: opacity .7s ease, transform .7s cubic-bezier(.2,.8,.2,1); }
.reveal-stagger.is-in > *:nth-child(1) { transition-delay: .04s; }
.reveal-stagger.is-in > *:nth-child(2) { transition-delay: .10s; }
.reveal-stagger.is-in > *:nth-child(3) { transition-delay: .16s; }
.reveal-stagger.is-in > *:nth-child(4) { transition-delay: .22s; }
.reveal-stagger.is-in > *:nth-child(5) { transition-delay: .28s; }
.reveal-stagger.is-in > *:nth-child(6) { transition-delay: .34s; }
.reveal-stagger.is-in > * { opacity: 1; transform: translateY(0); }

/* =============================================================
 *  1. 顶部导航
 * ============================================================= */
.site-nav {
  position: sticky; top: 0; left: 0; right: 0; z-index: 50;
  padding: 18px 0;
  transition: all var(--transition);
}
.site-nav.is-scrolled {
  background: rgba(255,255,255,.78);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  box-shadow: 0 1px 0 rgba(15,23,42,.06), 0 8px 24px -18px rgba(15,23,42,.2);
  padding: 12px 0;
}
.nav-inner {
  max-width: var(--container); margin: 0 auto; padding: 0 32px;
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
}
.brand {
  display: inline-flex; align-items: center; gap: 12px;
  font-family: var(--font-en); font-weight: 800; color: var(--ink-1);
}
.brand-logo {
  width: auto; height: 42px; max-width: 140px;
  object-fit: contain;
  flex-shrink: 0;
  display: block;
}
.brand-name-cn { font-family: var(--font-cn); font-size: 19px; font-weight: 800; letter-spacing: .02em; }
.brand-name-en { font-size: 11px; font-weight: 600; letter-spacing: .18em; color: var(--ink-4); text-transform: uppercase; }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }

.nav-links { display: flex; align-items: center; gap: 4px; list-style: none; }
.nav-links a {
  display: inline-block; padding: 10px 16px; border-radius: 999px;
  font-weight: 500; font-size: 15px; color: var(--ink-3);
  transition: all var(--transition); position: relative;
}
.nav-links a:hover { color: var(--brand-green); background: rgba(27,110,62,.06); }

/* 汉堡菜单 */
.hamburger { display: none; width: 42px; height: 42px; border-radius: 10px; align-items: center; justify-content: center; flex-direction: column; gap: 5px; }
.hamburger span { display: block; width: 22px; height: 2.2px; background: var(--ink-1); border-radius: 2px; transition: all 280ms ease; }
.hamburger.is-open span:nth-child(1) { transform: translateY(7.2px) rotate(45deg); }
.hamburger.is-open span:nth-child(2) { opacity: 0; transform: scaleX(.2); }
.hamburger.is-open span:nth-child(3) { transform: translateY(-7.2px) rotate(-45deg); }

.mobile-menu {
  display: none; position: fixed; inset: 72px 16px auto 16px; z-index: 49;
  background: rgba(255,255,255,.96); backdrop-filter: blur(18px);
  border: 1px solid var(--line); border-radius: 20px; padding: 18px;
  box-shadow: var(--shadow-lg);
  transform: translateY(-8px); opacity: 0; pointer-events: none;
  transition: all var(--transition);
}
.mobile-menu.is-open { transform: translateY(0); opacity: 1; pointer-events: auto; }
.mobile-menu ul { list-style: none; display: flex; flex-direction: column; gap: 4px; }
.mobile-menu a { display: block; padding: 14px 16px; border-radius: 12px; font-weight: 600; color: var(--ink-2); }
.mobile-menu a:hover { background: rgba(27,110,62,.06); color: var(--brand-green); }
.mobile-cta { margin-top: 14px; padding-top: 14px; border-top: 1px dashed var(--line); }
.mobile-cta .btn { width: 100%; justify-content: center; }

/* =============================================================
 *  2. Hero 首屏（PC 右侧常驻小程序二维码）
 * ============================================================= */
.hero {
  position: relative; min-height: 760px; display: flex; align-items: center;
  padding: 80px 0 140px;
  background:
    radial-gradient(ellipse 70% 60% at 85% 20%, rgba(16,185,129,.18), transparent 60%),
    radial-gradient(ellipse 60% 55% at 10% 90%, rgba(27,110,62,.20), transparent 60%),
    linear-gradient(180deg, #F5FBF7 0%, #E8F6EE 100%);
  overflow: hidden;
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(to right, rgba(27,110,62,.07) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(27,110,62,.07) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 40%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 40%, transparent 100%);
}
.hero-grid {
  position: relative; z-index: 2;
  display: grid; grid-template-columns: 55fr 45fr; gap: 64px; align-items: center;
}
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 8px 18px; border-radius: 999px;
  background: rgba(255,255,255,.8); border: 1px solid rgba(255,255,255,.9);
  backdrop-filter: blur(8px);
  color: var(--brand-green); font-weight: 600; font-size: 14px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 28px;
}
.hero-eyebrow .dot { width: 8px; height: 8px; border-radius: 50%; background: #16A34A; box-shadow: 0 0 0 4px rgba(22,163,74,.2); animation: pulseDot 2s ease-out infinite; }
@keyframes pulseDot { 0%{box-shadow:0 0 0 0 rgba(22,163,74,.45);} 70%{box-shadow:0 0 0 12px rgba(22,163,74,0);} 100%{box-shadow:0 0 0 0 rgba(22,163,74,0);} }
.hero-title .h1 span {
  background: linear-gradient(135deg, var(--brand-green) 0%, var(--brand-green-3) 45%, var(--brand-green-2) 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  display: inline-block;
}
.hero-desc { margin: 28px 0 40px; font-size: 18px; color: var(--ink-3); max-width: 560px; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 16px; }
.hero-meta { margin-top: 48px; display: flex; flex-wrap: wrap; gap: 24px 48px; color: var(--ink-4); font-size: 14px; }
.hero-meta li { list-style: none; display: inline-flex; align-items: center; gap: 8px; }
.hero-meta li b { color: var(--ink-1); font-family: var(--font-en); font-size: 20px; font-weight: 800; }
.hero-meta li svg { color: var(--brand-green-2); }

/* Hero 右侧：小程序二维码卡（PC 常驻） */
.hero-visual { position: relative; min-height: 520px; display: flex; align-items: center; justify-content: center; }
.hero-qr-card {
  position: relative; width: 100%; max-width: 360px;
  background: #fff; border-radius: 28px; padding: 24px;
  box-shadow: 0 32px 80px -20px rgba(27,110,62,.35);
  z-index: 3;
  border: 1px solid rgba(255,255,255,.8);
}
.hero-qr-card::before {
  content: ""; position: absolute; inset: -14px; z-index: -1;
  background: conic-gradient(from 0deg, var(--brand-green-2), #A7F3D0, var(--brand-green-3), var(--brand-green-2));
  border-radius: 40px; filter: blur(22px); opacity: .45;
  animation: qrHalo 8s linear infinite;
}
@keyframes qrHalo { to { transform: rotate(360deg); } }
.hero-qr-head {
  display: flex; align-items: center; gap: 12px;
  padding: 4px 4px 18px; margin-bottom: 4px;
  border-bottom: 1px dashed var(--line);
}
.hero-qr-head img {
  width: auto; height: 44px; max-width: 120px; object-fit: contain;
  display: block;
}
.hero-qr-head .t { display: flex; flex-direction: column; line-height: 1.25; }
.hero-qr-head .t b { font-size: 16px; color: var(--ink-1); font-weight: 800; }
.hero-qr-head .t span { font-size: 12px; color: var(--ink-4); margin-top: 2px; }
.hero-qr-tag {
  margin-left: auto; padding: 5px 10px; border-radius: 999px;
  background: rgba(7,193,96,.12); color: #047857;
  font-size: 12px; font-weight: 700; white-space: nowrap;
}
.hero-qr-box {
  position: relative; width: 100%; aspect-ratio: 1/1; margin: 18px auto 14px;
  border-radius: 20px; overflow: hidden;
  background: #fff; padding: 16px;
  border: 2px solid rgba(27,110,62,.12);
}
.hero-qr-box svg, .hero-qr-box img { width: 100%; height: 100%; display: block; object-fit: contain; }
.hero-qr-corners > span {
  position: absolute; width: 20px; height: 20px;
  border: 3px solid var(--brand-green);
}
.hero-qr-corners .tl { top: -14px;   left: -14px;  border-right: 0; border-bottom: 0; border-top-left-radius: 8px; }
.hero-qr-corners .tr { top: -14px;   right: -14px; border-left: 0;  border-bottom: 0; border-top-right-radius: 8px; border-color: var(--brand-green-2); }
.hero-qr-corners .bl { bottom: -14px; left: -14px;  border-right: 0; border-top: 0; border-bottom-left-radius: 8px; border-color: var(--brand-green-2); }
.hero-qr-corners .br { bottom: -14px; right: -14px; border-left: 0;  border-top: 0; border-bottom-right-radius: 8px; }
.hero-qr-foot { text-align: center; }
.hero-qr-foot p {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-size: 14px; color: var(--ink-3); font-weight: 600;
  padding: 8px 14px; border-radius: 999px; background: var(--bg-3);
}
.hero-qr-foot p svg { color: #07C160; }

/* Hero 装饰环（在二维码卡背后漂浮） */
.hero-ring {
  position: absolute; border-radius: 50%;
  background: conic-gradient(from 220deg, var(--brand-green), var(--brand-green-2), var(--brand-green-3), var(--brand-green-3), var(--brand-green));
  filter: blur(2px);
  animation: rotate 22s linear infinite;
}
.hero-ring.r1 { width: 500px; height: 500px; opacity: .15; }
.hero-ring.r2 { width: 380px; height: 380px; opacity: .28; animation-duration: 16s; animation-direction: reverse; }
@keyframes rotate { to { transform: rotate(360deg); } }

/* 滚动提示 */
.scroll-hint {
  position: absolute; bottom: 32px; left: 50%; transform: translateX(-50%);
  color: var(--ink-4); font-size: 12px; letter-spacing: .2em; text-transform: uppercase;
  display: inline-flex; flex-direction: column; align-items: center; gap: 10px; opacity: .85;
  z-index: 3;
}
.scroll-hint .line {
  width: 1px; height: 42px;
  background: linear-gradient(to bottom, var(--brand-green), transparent);
  position: relative; overflow: hidden;
}
.scroll-hint .line::after {
  content: ""; position: absolute; top: 0; left: -1px; right: -1px; height: 10px;
  background: var(--brand-green-2);
  animation: scrollDown 2s ease-in-out infinite;
}
@keyframes scrollDown { 0%{transform:translateY(-10px);} 100%{transform:translateY(42px);} }

/* =============================================================
 *  3. 关于我们：基础信息 + 3大痛点 + 5大壁垒
 * ============================================================= */
.about { background: #fff; }
.about-grid {
  display: grid; grid-template-columns: 1fr 1.2fr; gap: 72px; align-items: start;
  margin-bottom: 72px;
}
.about-lead .lead + .lead { margin-top: 20px; }
.about-tag-list { margin-top: 28px; display: flex; flex-wrap: wrap; gap: 10px; }
.about-tag {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 7px 14px; border-radius: 999px;
  background: var(--bg-3); border: 1px solid var(--line); color: var(--ink-2);
  font-size: 13.5px; font-weight: 500;
}
.about-tag svg { color: var(--brand-green-2); width: 14px; height: 14px; }

/* 3 大行业痛点卡 */
.pain-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
  margin-top: 56px; margin-bottom: 80px;
}
.pain-card {
  position: relative; padding: 32px 28px;
  background: linear-gradient(135deg, #FFFBF7 0%, #FFF4E8 100%);
  border: 1px solid rgba(16,185,129,.15);
  border-radius: var(--radius-l);
  transition: all var(--transition);
}
.pain-card::before {
  content: ""; position: absolute; top: 20px; right: 20px;
  width: 52px; height: 52px; border-radius: 14px;
  background: rgba(16,185,129,.1);
  display: inline-flex; align-items: center; justify-content: center;
}
.pain-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.pain-num {
  font-family: var(--font-en); font-weight: 800; font-size: 44px; line-height: 1;
  background: linear-gradient(135deg, var(--brand-green-2), #6EE7B7);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  margin-bottom: 18px;
}
.pain-title { font-size: 18px; font-weight: 700; color: var(--ink-1); margin-bottom: 10px; }
.pain-desc { font-size: 14.5px; color: var(--ink-3); line-height: 1.8; }
.pain-solve {
  margin-top: 18px; padding-top: 16px;
  border-top: 1px dashed rgba(16,185,129,.25);
  display: inline-flex; align-items: flex-start; gap: 8px;
  font-size: 13.5px; color: #1B6E3E; font-weight: 600; line-height: 1.6;
}
.pain-solve svg { flex-shrink: 0; margin-top: 2px; color: var(--brand-green-2); }

/* 5 大核心壁垒 */
.barrier-head {
  display: flex; align-items: flex-end; justify-content: space-between;
  margin-bottom: 40px; gap: 24px; flex-wrap: wrap;
}
.barrier-grid {
  display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px;
}
.barrier-card {
  position: relative; padding: 28px 22px;
  background: #fff; border-radius: var(--radius-l);
  border: 1px solid var(--line);
  text-align: center;
  transition: all var(--transition);
  overflow: hidden;
}
.barrier-card::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(27,110,62,.06) 100%);
  opacity: 0; transition: opacity var(--transition);
}
.barrier-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-md); border-color: rgba(27,110,62,.15); }
.barrier-card:hover::after { opacity: 1; }
.barrier-ico {
  width: 56px; height: 56px; border-radius: 18px; margin: 0 auto 20px;
  display: inline-flex; align-items: center; justify-content: center;
  color: #fff; position: relative; z-index: 2;
}
.barrier-card.bi1 .barrier-ico { background: linear-gradient(135deg, #3B82F6, #1D4ED8); }
.barrier-card.bi2 .barrier-ico { background: linear-gradient(135deg, #F97316, #C2410C); }
.barrier-card.bi3 .barrier-ico { background: linear-gradient(135deg, #10B981, #047857); }
.barrier-card.bi4 .barrier-ico { background: linear-gradient(135deg, #8B5CF6, #4338CA); }
.barrier-card.bi5 .barrier-ico { background: linear-gradient(135deg, #06B6D4, #0369A1); }
.barrier-title { font-size: 15.5px; font-weight: 700; color: var(--ink-1); margin-bottom: 8px; position: relative; z-index: 2; }
.barrier-desc { font-size: 13px; color: var(--ink-4); line-height: 1.75; position: relative; z-index: 2; }

/* 数据看板 4 卡 */
.stats-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
}
.stat-card {
  position: relative; padding: 36px 32px;
  background: #fff; border-radius: var(--radius-l);
  border: 1px solid var(--line);
  overflow: hidden;
  transition: all var(--transition);
}
.stat-card::before {
  content: ""; position: absolute; inset: 0;
  padding: 1.5px; border-radius: inherit;
  background: linear-gradient(135deg, transparent, var(--brand-green), var(--brand-green-2), transparent);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
          mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
  opacity: 0; transition: opacity var(--transition);
}
.stat-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-md); }
.stat-card:hover::before { opacity: 1; }
.stat-card .stat-icon {
  width: 52px; height: 52px; border-radius: 16px;
  display: inline-flex; align-items: center; justify-content: center;
  color: #fff; margin-bottom: 24px;
}
.stat-card .stat-num {
  font-family: var(--font-en); font-weight: 800; font-size: 44px; line-height: 1;
  background: linear-gradient(135deg, var(--brand-green), var(--brand-green-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  display: inline-block;
}
.stat-card .stat-suf { font-family: var(--font-en); font-weight: 700; font-size: 24px; color: var(--brand-green-2); margin-left: 2px; }
.stat-card .stat-label { margin-top: 14px; font-size: 15px; color: var(--ink-4); font-weight: 500; }
.stat-card.c1 .stat-icon { background: linear-gradient(135deg, #22C55E, #15803D); }
.stat-card.c2 .stat-icon { background: linear-gradient(135deg, var(--brand-green-2), #6EE7B7); }
.stat-card.c3 .stat-icon { background: linear-gradient(135deg, var(--brand-green), var(--brand-green-3)); }
.stat-card.c4 .stat-icon { background: linear-gradient(135deg, #8B5CF6, #6366F1); }

/* =============================================================
 *  4. 核心业务（4 大业务板块）
 * ============================================================= */
.business {
  background:
    radial-gradient(ellipse 60% 40% at 10% 0%, rgba(16,185,129,.08), transparent 70%),
    radial-gradient(ellipse 60% 40% at 90% 100%, rgba(27,110,62,.08), transparent 70%),
    var(--bg-2);
}
.biz-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px;
}
.biz-card {
  position: relative; padding: 40px 36px;
  background: #fff; border-radius: var(--radius-l);
  border: 1px solid transparent;
  overflow: hidden;
  transition: all 420ms cubic-bezier(.2,.8,.2,1);
}
.biz-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 4px;
  background: linear-gradient(90deg, var(--brand-green), var(--brand-green-2));
  transform: scaleX(0); transform-origin: left; transition: transform var(--transition);
}
.biz-card::after {
  content: ""; position: absolute; right: -80px; top: -80px;
  width: 260px; height: 260px; border-radius: 50%;
  background: radial-gradient(circle, rgba(27,110,62,.08), transparent 65%);
  opacity: 0; transform: scale(.6); transition: all var(--transition);
}
.biz-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 36px 80px -30px rgba(27,110,62,.35);
  border-color: rgba(27,110,62,.08);
}
.biz-card:hover::before { transform: scaleX(1); }
.biz-card:hover::after { opacity: 1; transform: scale(1); }
.biz-head { display: flex; align-items: flex-start; gap: 20px; margin-bottom: 22px; position: relative; z-index: 2; }
.biz-ico {
  width: 64px; height: 64px; border-radius: 20px;
  display: inline-flex; align-items: center; justify-content: center;
  color: #fff; flex-shrink: 0;
}
.biz-num-tag {
  margin-left: auto; padding: 4px 12px; border-radius: 999px;
  background: var(--bg-3); color: var(--ink-4);
  font-family: var(--font-en); font-size: 12px; font-weight: 700; letter-spacing: .1em;
  white-space: nowrap;
}
.biz-card.feat .biz-num-tag {
  background: rgba(16,185,129,.12); color: #1B6E3E;
}
.biz-title { font-family: var(--font-cn); font-size: 22px; font-weight: 700; color: var(--ink-1); margin-bottom: 6px; position: relative; z-index: 2; }
.biz-subtitle { font-size: 13.5px; color: var(--brand-green-2); font-weight: 600; margin-bottom: 14px; position: relative; z-index: 2; }
.biz-desc { font-size: 15px; color: var(--ink-3); line-height: 1.85; position: relative; z-index: 2; }
.biz-points { list-style: none; margin-top: 20px; display: flex; flex-direction: column; gap: 10px; position: relative; z-index: 2; }
.biz-points li {
  display: inline-flex; align-items: flex-start; gap: 10px;
  font-size: 14px; color: var(--ink-2); line-height: 1.65;
}
.biz-points li::before {
  content: ""; flex-shrink: 0; margin-top: 7px;
  width: 6px; height: 6px; border-radius: 50%;
  background: linear-gradient(135deg, var(--brand-green), var(--brand-green-2));
  box-shadow: 0 0 0 4px rgba(16,185,129,.1);
}

.b1 .biz-ico { background: linear-gradient(135deg, #3B82F6, #1D4ED8); }
.b2 .biz-ico { background: linear-gradient(135deg, #F97316, #C2410C); }
.b3 .biz-ico { background: linear-gradient(135deg, #10B981, #047857); }
.b4 .biz-ico { background: linear-gradient(135deg, #8B5CF6, #4338CA); }

/* =============================================================
 *  5. 大货通 ERP 产品宣传（首页新增）
 * ============================================================= */
.erp-section {
  background:
    radial-gradient(ellipse 70% 55% at 15% 15%, rgba(16,185,129,.14), transparent 60%),
    radial-gradient(ellipse 60% 50% at 85% 85%, rgba(27,110,62,.12), transparent 60%),
    #fff;
}

.erp-hero {
  display: grid; grid-template-columns: 1.1fr 1fr; gap: 64px; align-items: center;
  margin-bottom: 64px;
}
.erp-hero-left { max-width: 560px; }
.erp-hero-left .eyebrow { margin-bottom: 22px; }
.erp-title {
  font-family: var(--font-cn); font-size: clamp(28px, 3.4vw, 42px);
  font-weight: 800; color: var(--ink-1); line-height: 1.25;
  letter-spacing: -.02em; margin-bottom: 20px;
}
.erp-title strong {
  background: linear-gradient(135deg, var(--brand-green) 0%, var(--brand-green-2) 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.erp-desc {
  font-size: 16px; color: var(--ink-3); line-height: 1.9; margin-bottom: 28px;
}
.erp-desc strong { color: var(--brand-green); }
.erp-cta { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 36px; }
.erp-meta {
  display: flex; flex-wrap: wrap; gap: 24px 40px;
  list-style: none; padding: 0;
}
.erp-meta li {
  display: inline-flex; align-items: center; gap: 10px;
  color: var(--ink-4); font-size: 14px;
}
.erp-meta li b {
  color: var(--ink-1); font-family: var(--font-en);
  font-size: 18px; font-weight: 800;
}
.erp-meta li svg { color: var(--brand-green-2); flex-shrink: 0; }

/* 右侧：设备展示 */
.erp-hero-right { position: relative; min-height: 440px; }
.erp-ring {
  position: absolute; border-radius: 50%;
  background: conic-gradient(from 220deg, var(--brand-green), var(--brand-green-2), var(--brand-green-3), var(--brand-green-3), var(--brand-green));
  filter: blur(2px);
  animation: rotate 22s linear infinite;
}
.erp-ring.r1 { width: 440px; height: 440px; opacity: .15; }
.erp-ring.r2 { width: 320px; height: 320px; opacity: .28; animation-duration: 16s; animation-direction: reverse; }

.erp-device {
  position: absolute; top: 30px; right: 20px; width: 360px; z-index: 3;
}
.erp-device-screen {
  width: 100%; aspect-ratio: 16/10;
  background: linear-gradient(135deg, #0F1F1A 0%, #1B3A32 100%);
  border-radius: 12px; padding: 6px;
  box-shadow: 0 30px 80px -20px rgba(15,31,26,.38), 0 6px 16px rgba(15,31,26,.18);
  border: 1.5px solid rgba(27,110,62,.25);
}
.erp-window-bar {
  height: 28px; background: linear-gradient(135deg, #F0F5F2, #E2EDE6);
  border-bottom: 1px solid var(--line);
  display: flex; align-items: center; padding: 0 10px; gap: 6px;
  border-radius: 6px 6px 0 0;
}
.erp-window-bar span { width: 10px; height: 10px; border-radius: 50%; background: #DC2626; }
.erp-window-bar span:nth-child(2) { background: #F59E0B; }
.erp-window-bar span:nth-child(3) { background: #10B981; }
.erp-window-body {
  display: flex; flex-direction: column; background: #fff; border-radius: 0 0 6px 6px; overflow: hidden; height: calc(100% - 28px);
}
.erp-sidebar {
  width: 46px; background: linear-gradient(180deg, var(--brand-green) 0%, var(--brand-green-2) 100%);
  height: 100%; float: left;
}
.erp-main {
  margin-left: 46px; padding: 12px; display: flex; flex-direction: column; gap: 10px;
  height: 100%; background: var(--bg-2);
}
.erp-main-bar {
  height: 18px; background: linear-gradient(90deg, var(--brand-green), var(--brand-green-2));
  border-radius: 4px; width: 70%;
}
.erp-stat-row { display: flex; gap: 8px; }
.erp-stat-row span {
  flex: 1; height: 34px; background: #fff;
  border: 1px solid var(--line); border-radius: 6px;
  box-shadow: 0 1px 2px rgba(0,0,0,.04);
}
.erp-chart {
  flex: 1; min-height: 50px;
  background:
    linear-gradient(180deg, rgba(16,185,129,.18) 0%, transparent 100%),
    repeating-linear-gradient(90deg, transparent, transparent 8px, rgba(27,110,62,.12) 8px, rgba(27,110,62,.12) 9px);
  border-radius: 6px;
}
.erp-table { display: flex; flex-direction: column; gap: 5px; }
.erp-table span {
  height: 14px; background: #fff; border: 1px solid var(--line); border-radius: 3px;
}

/* 功能亮点卡片 */
.erp-features {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
  margin-bottom: 48px;
}
.erp-feat {
  position: relative; padding: 28px 24px;
  background: #fff; border-radius: var(--radius-l);
  border: 1px solid var(--line);
  transition: all var(--transition);
  overflow: hidden;
}
.erp-feat::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--brand-green), var(--brand-green-2));
  transform: scaleX(0); transform-origin: left; transition: transform var(--transition);
}
.erp-feat:hover {
  transform: translateY(-6px);
  box-shadow: 0 24px 60px -20px rgba(27,110,62,.28);
  border-color: rgba(27,110,62,.18);
}
.erp-feat:hover::before { transform: scaleX(1); }
.erp-feat-ico {
  width: 54px; height: 54px; border-radius: 16px;
  display: inline-flex; align-items: center; justify-content: center;
  color: #fff; margin-bottom: 16px;
  box-shadow: 0 10px 24px -8px rgba(0,0,0,.2);
}
.erp-feat h4 {
  font-size: 16px; font-weight: 700; color: var(--ink-1); margin-bottom: 6px;
}
.erp-feat p {
  font-size: 13.5px; color: var(--ink-3); line-height: 1.7;
}
.erp-feat.ef1 .erp-feat-ico { background: linear-gradient(135deg, #3B82F6, #1D4ED8); }
.erp-feat.ef2 .erp-feat-ico { background: linear-gradient(135deg, #10B981, #047857); }
.erp-feat.ef3 .erp-feat-ico { background: linear-gradient(135deg, #F59E0B, #D97706); }
.erp-feat.ef4 .erp-feat-ico { background: linear-gradient(135deg, #F97316, #C2410C); }

/* 信任背书 */
.erp-trust {
  display: flex; flex-wrap: wrap; justify-content: center;
  gap: 36px; padding: 24px 28px;
  background: linear-gradient(135deg, rgba(16,185,129,.06), rgba(27,110,62,.04));
  border-radius: var(--radius-l);
  border: 1px solid rgba(27,110,62,.12);
}
.erp-trust-item {
  display: inline-flex; align-items: center; gap: 10px;
  color: var(--ink-3); font-size: 14px; font-weight: 500;
}
.erp-trust-item svg { color: var(--brand-green-2); flex-shrink: 0; }
.erp-trust-item b { color: var(--brand-green); }

/* =============================================================
 *  6. 三阶段发展规划（Timeline）
 * ============================================================= */
.history { background: #fff; }
.phase-tag {
  display: inline-block; padding: 5px 14px; border-radius: 999px;
  font-size: 12px; font-weight: 700; letter-spacing: .06em;
  margin-bottom: 12px;
}
.phase-tag.p1 { background: rgba(34,197,94,.14); color: #15803D; }
.phase-tag.p2 { background: rgba(59,130,246,.14); color: #1D4ED8; }
.phase-tag.p3 { background: rgba(139,92,246,.14); color: #5B21B6; }

.timeline { position: relative; max-width: 980px; margin: 0 auto; }
.timeline::before {
  content: ""; position: absolute; left: 50%; top: 0; bottom: 0; width: 3px;
  background: linear-gradient(180deg, var(--brand-green), var(--brand-green-2));
  transform: translateX(-50%);
  border-radius: 2px;
}
.tl-item {
  position: relative; width: 50%; padding: 20px 60px 64px;
}
.tl-item:nth-child(odd)  { left: 0; text-align: right; }
.tl-item:nth-child(even) { left: 50%; text-align: left; }
.tl-item:last-child { padding-bottom: 0; }
.tl-dot {
  position: absolute; top: 28px;
  width: 28px; height: 28px; border-radius: 50%;
  background: #fff; border: 4px solid var(--brand-green);
  box-shadow: 0 0 0 6px rgba(27,110,62,.12);
  display: inline-flex; align-items: center; justify-content: center;
  font-family: var(--font-en); font-weight: 800; font-size: 12px; color: var(--brand-green);
}
.tl-item:nth-child(odd) .tl-dot  { right: -14px; }
.tl-item:nth-child(even) .tl-dot { left:  -14px; border-color: var(--brand-green-2); box-shadow: 0 0 0 6px rgba(16,185,129,.15); color: var(--brand-green-2); }
.tl-item.is-in .tl-dot { animation: dotPulse 2.2s ease-out infinite; }
@keyframes dotPulse { 0%{box-shadow:0 0 0 0 rgba(16,185,129,.35);} 60%{box-shadow:0 0 0 16px rgba(16,185,129,0);} 100%{box-shadow:0 0 0 0 rgba(16,185,129,0);} }
.tl-card {
  background: #fff; padding: 30px 32px;
  border: 1px solid var(--line); border-radius: var(--radius-l);
  box-shadow: var(--shadow-sm);
  position: relative;
  transition: all var(--transition);
}
.tl-item.is-in .tl-card { transform: translateX(0); opacity: 1; }
.tl-item:nth-child(odd) .tl-card  { transform: translateX(-24px); opacity: 0; transition-delay: .1s; }
.tl-item:nth-child(even) .tl-card { transform: translateX( 24px); opacity: 0; transition-delay: .1s; }
.tl-item.is-in:nth-child(odd) .tl-card,
.tl-item.is-in:nth-child(even) .tl-card { opacity: 1; transform: translateX(0); }
.tl-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.tl-year {
  font-family: var(--font-en); font-weight: 800; font-size: 28px; line-height: 1;
  color: var(--ink-1);
  margin-bottom: 8px;
  display: inline-flex; align-items: baseline; gap: 8px;
}
.tl-year small { font-size: 14px; color: var(--ink-4); font-weight: 600; letter-spacing: .04em; }
.tl-title { font-family: var(--font-cn); font-size: 19px; font-weight: 700; color: var(--ink-1); margin-bottom: 14px; }
.tl-points { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.tl-points li {
  display: inline-flex; align-items: flex-start; gap: 8px;
  font-size: 14.5px; color: var(--ink-3); line-height: 1.75;
}
.tl-points li svg { flex-shrink: 0; margin-top: 4px; color: var(--brand-green); }
.tl-item:nth-child(even) .tl-points li svg { color: var(--brand-green-2); }

/* =============================================================
 *  6. 小程序入口（核心转化区）
 * ============================================================= */
.applet-section {
  background:
    radial-gradient(ellipse 60% 50% at 0% 0%, rgba(16,185,129,.18), transparent 60%),
    radial-gradient(ellipse 80% 60% at 100% 100%, rgba(27,110,62,.22), transparent 60%),
    linear-gradient(135deg, #0A3320 0%, #1B6E3E 60%, #10B981 100%);
  color: #fff;
  position: relative; overflow: hidden;
}
.applet-section::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(to right, rgba(255,255,255,.05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,.05) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 100% 80% at 50% 50%, black 40%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 100% 80% at 50% 50%, black 40%, transparent 100%);
}
.applet-wrap {
  position: relative; z-index: 2;
  background: linear-gradient(135deg, rgba(255,255,255,.08), rgba(255,255,255,.02));
  border: 1px solid rgba(255,255,255,.14);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  border-radius: var(--radius-xl);
  padding: 64px;
  display: grid; grid-template-columns: 380px 1fr; gap: 72px; align-items: center;
  box-shadow: 0 40px 100px -30px rgba(0,0,0,.45);
}
.applet-qr-wrap { position: relative; }
.applet-qr-card {
  position: relative; background: #fff; border-radius: 28px; padding: 28px;
  box-shadow: 0 24px 80px -20px rgba(0,0,0,.45);
  text-align: center; color: var(--ink-1);
}
.applet-qr-card::before {
  content: ""; position: absolute; inset: -12px; z-index: -1;
  background: conic-gradient(from 0deg, var(--brand-green-2), #A7F3D0, var(--brand-green-3), var(--brand-green-2));
  border-radius: 36px; filter: blur(18px); opacity: .55;
  animation: qrHalo 6s linear infinite;
}
.applet-qr-head {
  display: flex; align-items: center; gap: 10px; justify-content: center;
  padding-bottom: 16px; margin-bottom: 4px; border-bottom: 1px dashed var(--line);
}
.applet-qr-head img { width: auto; height: 40px; max-width: 120px; object-fit: contain; display: block; }
.applet-qr-title { font-family: var(--font-cn); font-size: 17px; font-weight: 700; color: var(--ink-1); }
.applet-qr-box {
  position: relative; width: 100%; aspect-ratio: 1/1; margin: 18px auto 0;
  border-radius: 20px; overflow: hidden;
  background: #fff; padding: 18px;
  border: 2px solid rgba(27,110,62,.12);
}
.applet-qr-box svg, .applet-qr-box img { width: 100%; height: 100%; display: block; object-fit: contain; }
.applet-qr-corners > span {
  position: absolute; width: 22px; height: 22px;
  border: 3px solid var(--brand-green);
}
.applet-qr-corners .tl { top: -16px;   left: -16px;  border-right: 0; border-bottom: 0; border-top-left-radius: 8px; }
.applet-qr-corners .tr { top: -16px;   right: -16px; border-left: 0;  border-bottom: 0; border-top-right-radius: 8px; border-color: var(--brand-green-2); }
.applet-qr-corners .bl { bottom: -16px; left: -16px;  border-right: 0; border-top: 0; border-bottom-left-radius: 8px; border-color: var(--brand-green-2); }
.applet-qr-corners .br { bottom: -16px; right: -16px; border-left: 0;  border-top: 0; border-bottom-right-radius: 8px; }
.applet-qr-sub {
  margin-top: 18px; font-size: 14px; color: var(--ink-3); font-weight: 500;
  display: inline-flex; align-items: center; gap: 8px;
}
.applet-qr-sub svg { color: #07C160; }
.applet-mode-switch {
  margin-top: 16px; padding: 4px;
  background: rgba(0,0,0,.2); border-radius: 999px;
  display: inline-flex; gap: 4px;
}
.applet-mode-switch button {
  padding: 8px 16px; border-radius: 999px;
  color: rgba(255,255,255,.75); font-size: 13px; font-weight: 600;
  transition: all var(--transition);
}
.applet-mode-switch button.active {
  background: var(--brand-green-2); color: #fff;
  box-shadow: 0 8px 18px -10px rgba(0,0,0,.6);
}
.qr-tip-pc, .qr-tip-mb { display: none; }
.is-mode-pc .qr-tip-pc { display: inline-flex; }
.is-mode-mb .qr-tip-mb { display: inline-flex; }

.applet-text .eyebrow {
  background: rgba(16,185,129,.18);
  color: #A7F3D0;
  margin-bottom: 22px;
}
.applet-text .eyebrow::before { background: #A7F3D0; box-shadow: 0 0 0 4px rgba(255,211,163,.2); }
.applet-text h2 { color: #fff; font-size: clamp(28px, 3vw, 40px); font-weight: 800; line-height: 1.2; margin-bottom: 20px; }
.applet-text h2 em { font-style: normal; color: var(--brand-green-3); }
.applet-text .lede { color: rgba(255,255,255,.82); font-size: 16.5px; line-height: 1.9; margin-bottom: 32px; }
.applet-features { list-style: none; display: grid; grid-template-columns: 1fr 1fr; gap: 16px 24px; margin-bottom: 40px; }
.applet-features li {
  display: inline-flex; align-items: flex-start; gap: 12px;
  color: rgba(255,255,255,.9); font-size: 14.5px;
}
.applet-features li .ft {
  width: 22px; height: 22px; border-radius: 50%;
  background: rgba(16,185,129,.25); color: #A7F3D0;
  display: inline-flex; align-items: center; justify-content: center;
  flex-shrink: 0; margin-top: 2px;
}
.applet-cta { display: flex; flex-wrap: wrap; gap: 16px; align-items: center; }
.applet-cta .btn-primary {
  background: linear-gradient(135deg, #34D399 0%, var(--brand-green-2) 100%);
  color: #fff;
}
.applet-cta .btn-open {
  background: #07C160; box-shadow: 0 18px 40px -14px rgba(7,193,96,.55);
  color: #fff;
}
.applet-cta .btn-open:hover { background: #06AD56; transform: translateY(-3px); }
.applet-cta .btn-ghost-white {
  background: rgba(255,255,255,.08); border: 1.5px solid rgba(255,255,255,.3);
  color: #fff;
}
.applet-cta .btn-ghost-white:hover { background: rgba(255,255,255,.18); transform: translateY(-3px); }
.applet-trust {
  margin-top: 36px; display: flex; flex-wrap: wrap; gap: 24px;
  color: rgba(255,255,255,.72); font-size: 13.5px;
}
.applet-trust b { color: #fff; font-family: var(--font-en); font-size: 15px; font-weight: 700; }

/* =============================================================
 *  7. 页脚 Footer
 * ============================================================= */
.footer { background: #0A3320; color: rgba(255,255,255,.75); padding: 72px 0 32px; }
.foot-grid {
  display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 64px;
  padding-bottom: 56px; border-bottom: 1px solid rgba(255,255,255,.08);
}
.foot-brand .brand { color: #fff; margin-bottom: 22px; }
.foot-brand .brand-name-cn { color: #fff; }
.foot-brand .brand-name-en { color: rgba(255,255,255,.5); }
.foot-brand-desc { font-size: 14.5px; line-height: 1.9; color: rgba(255,255,255,.65); max-width: 380px; }
.foot-sns { margin-top: 26px; display: flex; gap: 10px; }
.foot-sns a {
  width: 40px; height: 40px; border-radius: 12px;
  background: rgba(255,255,255,.06);
  display: inline-flex; align-items: center; justify-content: center;
  color: rgba(255,255,255,.8);
  transition: all var(--transition);
}
.foot-sns a:hover { background: var(--brand-green-2); color: #fff; transform: translateY(-3px); }
.foot-col h4 {
  color: #fff; font-size: 15px; font-weight: 700; margin-bottom: 22px; letter-spacing: .02em;
  display: inline-flex; align-items: center; gap: 8px;
}
.foot-col h4::before {
  content: ""; width: 4px; height: 16px; border-radius: 2px;
  background: linear-gradient(180deg, var(--brand-green-2), var(--brand-green));
}
.foot-col ul { list-style: none; display: flex; flex-direction: column; gap: 12px; }
.foot-col a {
  color: rgba(255,255,255,.62); font-size: 14.5px;
  position: relative; padding-bottom: 2px;
  transition: color var(--transition);
}
.foot-col a::after {
  content: ""; position: absolute; left: 0; bottom: 0;
  width: 0; height: 1px; background: var(--brand-green-3);
  transition: width var(--transition);
}
.foot-col a:hover { color: #fff; }
.foot-col a:hover::after { width: 100%; }
.foot-contact li {
  display: inline-flex; align-items: flex-start; gap: 12px;
  color: rgba(255,255,255,.7); font-size: 14.5px; line-height: 1.75;
}
.foot-contact svg { color: var(--brand-green-3); flex-shrink: 0; margin-top: 4px; }
.foot-contact .val { font-family: var(--font-en); }
.foot-bottom {
  padding-top: 28px; display: flex; flex-wrap: wrap; justify-content: space-between; gap: 20px;
  font-size: 13px; color: rgba(255,255,255,.5);
}
.foot-bottom a:hover { color: #fff; }
.foot-heart { color: var(--brand-green-2); display: inline-block; animation: beat 1.6s ease-in-out infinite; }
@keyframes beat { 0%,100%{transform:scale(1);} 30%{transform:scale(1.35);} }

/* =============================================================
 *  响应式 · 断点 1280（≥ 平板横屏）
 * ============================================================= */
@media (max-width: 1279px) {
  :root { --space-section: 96px; }
  .container { padding: 0 28px; }
  .nav-inner { padding: 0 28px; }
  .hero-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .biz-grid { grid-template-columns: repeat(2, 1fr); }
  .about-grid { grid-template-columns: 1fr; gap: 48px; }
  .pain-grid { grid-template-columns: 1fr; gap: 16px; }
  .barrier-grid { grid-template-columns: repeat(3, 1fr); }
  .foot-grid { grid-template-columns: 1fr 1fr; gap: 48px; }
  .applet-wrap { padding: 48px; grid-template-columns: 1fr; gap: 40px; }
  .applet-qr-wrap { max-width: 380px; margin: 0 auto; width: 100%; }
  .erp-hero { grid-template-columns: 1fr; gap: 48px; }
  .erp-hero-left { max-width: none; text-align: center; }
  .erp-desc { margin-left: auto; margin-right: auto; }
  .erp-cta { justify-content: center; }
  .erp-meta { justify-content: center; }
  .erp-hero-right { min-height: 360px; }
  .erp-device { width: 300px; top: 20px; right: 50%; transform: translateX(50%); }
  .erp-features { grid-template-columns: repeat(2, 1fr); }
}

/* =============================================================
 *  响应式 · 平板（768~1023）
 * ============================================================= */
@media (max-width: 1023px) {
  .nav-links { display: none; }
  .hamburger { display: inline-flex; }
  .mobile-menu { display: block; }
  .nav-qr-pop { display: none; }
  .hero-grid { grid-template-columns: 1fr; gap: 56px; }
  .hero-visual { min-height: auto; order: -1; }
  .hero-left { text-align: center; }
  .hero-desc { margin-left: auto; margin-right: auto; }
  .hero-cta { justify-content: center; }
  .hero-meta { justify-content: center; }
  .barrier-grid { grid-template-columns: repeat(2, 1fr); }
  .erp-hero { gap: 36px; margin-bottom: 48px; }
  .erp-hero-right { min-height: 320px; }
  .erp-device { width: 260px; }
  .erp-ring.r1 { width: 320px; height: 320px; }
  .erp-ring.r2 { width: 240px; height: 240px; }
}

/* =============================================================
 *  响应式 · 手机（≤767）
 * ============================================================= */
@media (max-width: 767px) {
  :root { --space-section: 80px; }
  .container { padding: 0 20px; }
  .nav-inner { padding: 0 20px; }
  .btn { padding: 12px 20px; font-size: 14.5px; }
  .h2 { font-size: 30px; }
  .section-head { margin-bottom: 44px; }
  .lead { font-size: 15.5px; }

  .brand-logo { height: 38px; max-width: 120px; object-fit: contain; display: block; width: auto; }
  .brand-name-cn { font-size: 17px; }
  .nav-cta .btn-primary { display: none; }
  .nav-cta .icon-btn  { display: inline-flex; }

  .hero { padding: 48px 0 110px; min-height: auto; }
  .hero-ring.r1 { width: 340px; height: 340px; }
  .hero-ring.r2 { width: 260px; height: 260px; }
  .hero-qr-card { padding: 20px; border-radius: 22px; }
  .hero-eyebrow { font-size: 12.5px; padding: 6px 14px; margin-bottom: 22px; }
  .hero-desc { font-size: 16px; margin: 22px 0 30px; }
  .hero-cta { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
  .hero-cta .btn { width: 100%; justify-content: center; }
  .hero-meta { margin-top: 34px; gap: 16px 28px; }
  .hero-meta li { font-size: 13px; }
  .hero-meta li b { font-size: 16px; }

  .about-grid { gap: 36px; }
  .pain-grid { margin-top: 40px; margin-bottom: 56px; }
  .pain-card { padding: 26px 22px; border-radius: var(--radius-m); }
  .pain-num { font-size: 36px; }
  .barrier-head { margin-bottom: 28px; }
  .barrier-grid { grid-template-columns: 1fr 1fr; gap: 14px; }
  .barrier-card { padding: 22px 16px; border-radius: var(--radius-m); }
  .barrier-ico { width: 48px; height: 48px; border-radius: 14px; margin-bottom: 14px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
  .stat-card { padding: 24px 20px; border-radius: var(--radius-m); }
  .stat-card .stat-icon { width: 42px; height: 42px; border-radius: 12px; margin-bottom: 16px; }
  .stat-card .stat-num { font-size: 32px; }
  .stat-card .stat-suf { font-size: 18px; }
  .stat-card .stat-label { font-size: 13px; margin-top: 10px; }

  .biz-grid { grid-template-columns: 1fr; gap: 18px; }
  .biz-card { padding: 30px 26px; border-radius: var(--radius-m); }
  .biz-ico { width: 54px; height: 54px; border-radius: 16px; }
  .biz-head { gap: 14px; }
  .biz-title { font-size: 19px; }

  .erp-hero-right { min-height: 280px; }
  .erp-device { width: 220px; }
  .erp-ring.r1 { width: 280px; height: 280px; }
  .erp-ring.r2 { width: 200px; height: 200px; }
  .erp-title { font-size: 26px; }
  .erp-cta { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
  .erp-cta .btn { width: 100%; justify-content: center; }
  .erp-meta { gap: 14px 20px; justify-content: center; }
  .erp-features { grid-template-columns: 1fr; gap: 14px; margin-bottom: 32px; }
  .erp-feat { padding: 22px 20px; border-radius: var(--radius-m); }
  .erp-feat-ico { width: 46px; height: 46px; border-radius: 14px; margin-bottom: 14px; }
  .erp-trust { gap: 14px; padding: 18px 16px; }
  .erp-trust-item { font-size: 13px; }

  .timeline::before { left: 22px; }
  .tl-item, .tl-item:nth-child(odd), .tl-item:nth-child(even) {
    width: 100%; left: 0; text-align: left;
    padding: 14px 0 48px 56px;
  }
  .tl-item:last-child { padding-bottom: 0; }
  .tl-item:nth-child(odd) .tl-dot,
  .tl-item:nth-child(even) .tl-dot {
    left: 10px; top: 22px;
  }
  .tl-item:nth-child(odd) .tl-card,
  .tl-item:nth-child(even) .tl-card {
    transform: translateX(14px);
  }
  .tl-item.is-in:nth-child(odd) .tl-card,
  .tl-item.is-in:nth-child(even) .tl-card {
    transform: translateX(0);
  }
  .tl-card { padding: 22px 22px; border-radius: var(--radius-m); }
  .tl-year { font-size: 24px; }

  .applet-wrap { padding: 32px 22px; gap: 36px; border-radius: 24px; }
  .applet-features { grid-template-columns: 1fr; gap: 14px; }
  .applet-cta .btn { width: 100%; justify-content: center; }
  .applet-cta { display: grid; gap: 12px; }
  .applet-trust { gap: 14px; margin-top: 24px; }

  .foot-grid { grid-template-columns: 1fr; gap: 40px; padding-bottom: 40px; }
  .foot-bottom { text-align: center; justify-content: center; }
}

/* 超窄屏兼容（< 375） */
@media (max-width: 374px) {
  :root { --space-section: 72px; }
  .h1 { font-size: 30px; }
  .h2 { font-size: 26px; }
  .stat-card .stat-num { font-size: 26px; }
  .stat-card .stat-icon { width: 38px; height: 38px; }
  .barrier-grid { grid-template-columns: 1fr; }
}

/* 减弱动画（尊重用户偏好） */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  .reveal, .reveal-stagger > * { opacity: 1; transform: none; }
}

/* 打印优化 */
@media print {
  .site-nav, .hamburger, .scroll-hint, .applet-mode-switch, .nav-qr-pop { display: none !important; }
  .hero { background: #fff; min-height: auto; padding: 24px 0; }
  .section { padding: 32px 0; page-break-inside: avoid; }
}