/* ============================================================
   源犬溯源系统官网 · 首页样式
   设计基调：内容区明亮暖白 / 图片区真实大图沉浸 / 砖橙强调 / 活泼不AI
   ============================================================ */

/* ---------- 全局变量：颜色 / 尺寸 / 动效 ---------- */
:root {
  /* 内容区（明亮暖调） */
  --c-bg: #FBF8F3;            /* 暖白主底 */
  --c-bg-soft: #F3EDE3;       /* 米灰次底 */
  --c-bg-mute: #EAE2D4;       /* 次米灰 */
  --c-ink: #1F1812;           /* 暖近黑主文字 */
  --c-ink-soft: #5C4F40;      /* 暖灰次文字 */
  --c-ink-mute: #9A8B78;      /* 弱暖灰 */
  --c-border: #E8DEC9;        /* 暖边框 */

  /* 图片沉浸区（真实大图 + 暖深蒙版） */
  --c-mask: rgba(28, 20, 12, .58);
  --c-mask-strong: rgba(20, 14, 8, .78);
  --c-deep: #1A130C;          /* 暖深色（页脚/案例侧） */
  --c-deep-2: #241B12;
  --c-on-deep: #FBF6EE;       /* 图片上的主文字 */
  --c-on-deep-soft: rgba(251, 246, 238, .8);
  --c-border-deep: rgba(255, 255, 255, .12);

  /* 品牌强调色：砖橙红（活泼有记忆点） */
  --c-accent: #C8462C;          /* 砖橙红主强调 */
  --c-accent-2: #A53A23;        /* 深砖橙 */
  --c-accent-soft: #E8A48C;     /* 浅橙 */
  --c-accent-glow: rgba(200, 70, 44, .3);

  /* 辅助色：墨绿（次要强调，平衡橙的燥） */
  --c-green: #2A5E45;
  --c-green-soft: #6B9B82;

  /* 尺寸与圆角 */
  --container: 1200px;
  --radius: 14px;
  --radius-lg: 22px;
  --radius-sm: 8px;

  /* 动效曲线 */
  --ease: cubic-bezier(.22, 1, .36, 1);
  --ease-expo: cubic-bezier(.16, 1, .3, 1);
}

/* ---------- 基础重置 ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei",
               "Helvetica Neue", "Segoe UI", system-ui, sans-serif;
  font-size: 15px;
  line-height: 1.65;
  color: var(--c-ink);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
h1, h2, h3, h4 { margin: 0; font-weight: 700; letter-spacing: -.01em; }
p { margin: 0; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }
img, svg { display: block; max-width: 100%; }
input, select, textarea { font-family: inherit; font-size: inherit; }

/* 通用容器 */
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }

/* 选区颜色 */
::selection { background: var(--c-accent); color: #fff; }


/* ============================================================
   通用按钮
   ============================================================ */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  height: 44px; padding: 0 22px;
  border-radius: 999px;
  font-size: 14px; font-weight: 600; letter-spacing: .02em;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease),
              background .25s, color .25s, border-color .25s;
  white-space: nowrap;
}
.btn--lg { height: 52px; padding: 0 30px; font-size: 15px; }
.btn--primary {
  background: var(--c-accent);
  color: #fff;
  box-shadow: 0 10px 30px -10px var(--c-accent-glow);
}
.btn--primary:hover { transform: translateY(-2px); background: var(--c-accent-2); box-shadow: 0 16px 38px -10px var(--c-accent-glow); }
.btn--ghost {
  background: transparent;
  color: var(--c-ink);
  border: 1.5px solid var(--c-border);
}
.btn--ghost:hover { border-color: var(--c-ink); transform: translateY(-2px); }
.btn--ghost-light { color: #fff; border-color: rgba(255, 255, 255, .4); }
.btn--ghost-light:hover { border-color: #fff; background: rgba(255, 255, 255, .08); }


/* ============================================================
   Header 顶部导航
   ============================================================ */
.header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: 72px;
  transition: background .3s, backdrop-filter .3s, border-color .3s, height .3s;
  border-bottom: 1px solid transparent;
}
.header.is-scrolled {
  height: 64px;
  background: rgba(251, 248, 243, .88);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom-color: var(--c-border);
}
.header__inner {
  height: 100%;
  display: flex; align-items: center; justify-content: space-between; gap: 32px;
}

/* Logo */
.logo { display: inline-flex; align-items: center; gap: 10px; color: var(--c-ink); }
.logo__mark {
  display: inline-flex; align-items: center; justify-content: center;
  width: 38px; height: 38px;
}
.logo__img { width: 100%; height: 100%; object-fit: contain; }
/* 默认（Header 浮在深色 Hero 上）显示白版 */
.logo__img--dark { display: none; }
/* Header 滚动后（白底）切换为黑版 logo */
.header.is-scrolled .logo__img--light { display: none; }
.header.is-scrolled .logo__img--dark { display: block; }
.logo__text { display: flex; flex-direction: column; line-height: 1; }
.logo__text strong { font-size: 17px; letter-spacing: .02em; }
.logo__text em { font-size: 10px; letter-spacing: .25em; color: var(--c-ink-mute); font-style: normal; margin-top: 3px; }
.logo--light { color: #fff; }
.logo--light .logo__text em { color: var(--c-on-deep-soft); }
.logo--light .logo__mark { color: var(--c-accent-soft); }

/* Header logo：未滚动浮在深色 Hero 上，文字用浅色；滚动后切深色 */
.header .logo { color: #fff; }
.header .logo__text em { color: rgba(255, 255, 255, .6); }
.header.is-scrolled .logo { color: var(--c-ink); }
.header.is-scrolled .logo__text em { color: var(--c-ink-mute); }

/* 主导航 */
.nav { display: flex; gap: 4px; }
.nav__item {
  position: relative;
  padding: 8px 16px; font-size: 14px; font-weight: 500;
  color: rgba(255, 255, 255, .85); transition: color .2s;
}
.nav__item i {
  font-style: normal; font-size: 10px; color: rgba(255, 255, 255, .5);
  margin-left: 4px; letter-spacing: .1em;
}
.nav__item:hover { color: #fff; }
.nav__item.active { color: #fff; }
.nav__item.active::after {
  content: ""; position: absolute; left: 16px; right: 16px; bottom: 2px;
  height: 2px; background: var(--c-accent-soft); border-radius: 2px;
}

/* 联系按钮：未滚动浮在深色 Hero 上，用浅色文字 + 浅色边框 */
.header__cta {
  height: 40px; padding: 0 18px; font-size: 13px;
  color: #fff; border-color: rgba(255, 255, 255, .4);
}
.header__cta:hover {
  border-color: #fff; background: rgba(255, 255, 255, .08);
}

/* 滚动后：Header 切白底，导航/按钮/汉堡全部切回深色 */
.header.is-scrolled .nav__item { color: var(--c-ink-soft); }
.header.is-scrolled .nav__item i { color: var(--c-ink-mute); }
.header.is-scrolled .nav__item:hover { color: var(--c-ink); }
.header.is-scrolled .nav__item.active { color: var(--c-ink); }
.header.is-scrolled .nav__item.active::after { background: var(--c-accent); }
.header.is-scrolled .header__cta {
  color: var(--c-ink); border-color: var(--c-border);
}
.header.is-scrolled .header__cta:hover {
  border-color: var(--c-ink); background: transparent;
}
.header.is-scrolled .header__burger span { background: var(--c-ink); }

/* 移动端汉堡 */
.header__burger {
  display: none; width: 32px; height: 32px; position: relative;
}
.header__burger span {
  position: absolute; left: 6px; right: 6px; height: 2px; background: #fff;
  border-radius: 2px; transition: transform .3s, opacity .3s, top .3s;
}
.header__burger span:nth-child(1) { top: 9px; }
.header__burger span:nth-child(2) { top: 15px; }
.header__burger span:nth-child(3) { top: 21px; }
.header__burger.is-open span:nth-child(1) { top: 15px; transform: rotate(45deg); }
.header__burger.is-open span:nth-child(2) { opacity: 0; }
.header__burger.is-open span:nth-child(3) { top: 15px; transform: rotate(-45deg); }

/* 移动端全屏导航 */
.nav-mobile {
  position: fixed; top: 0; left: 0; right: 0;
  height: 100vh;
  background: var(--c-bg);
  padding: 72px 24px 24px;
  display: flex; flex-direction: column; gap: 8px;
  transform: translateX(100%); transition: transform .35s var(--ease);
  z-index: 99;
  overflow-y: auto;
}
.nav-mobile.is-open { transform: translateX(0); }
.nav-mobile__item {
  padding: 16px 8px; font-size: 18px; font-weight: 600;
  border-bottom: 1px solid var(--c-border); color: var(--c-ink);
}
.nav-mobile__item i { font-style: normal; font-size: 12px; color: var(--c-ink-mute); margin-left: 8px; }
.nav-mobile__cta { margin-top: 24px; }


/* ============================================================
   通用 Section
   ============================================================ */
.section { padding: 110px 0; position: relative; }
.section__head { max-width: 760px; margin-bottom: 56px; }
.section__head--split {
  max-width: 100%; display: flex; justify-content: space-between;
  align-items: flex-end; gap: 32px;
}
.section__eyebrow {
  display: inline-block; font-size: 12px; font-weight: 600; letter-spacing: .2em;
  color: var(--c-accent); margin-bottom: 16px;
}
.section__title {
  font-size: 38px; line-height: 1.25; color: var(--c-ink);
}
.section__desc {
  margin-top: 18px; font-size: 16px; color: var(--c-ink-soft); max-width: 620px;
}
.section__head-desc {
  font-size: 13px; color: var(--c-ink-mute); max-width: 320px; text-align: right;
}
.section__head--light .section__eyebrow { color: var(--c-accent-soft); }
.section__head--light .section__title { color: var(--c-on-deep); }
.section__head--light .section__desc { color: var(--c-on-deep-soft); }


/* ============================================================
   Hero 区域（沉浸：工厂实拍大图）
   ============================================================ */
.hero {
  position: relative; min-height: 100vh;
  display: flex; align-items: center;
  padding: 120px 0 80px;
  background: var(--c-deep);
  overflow: hidden;
}

/* 背景层 */
.hero__bg { position: absolute; inset: 0; z-index: 0; pointer-events: none; }
/* 工厂实拍大图 + Ken Burns 缓慢推进 */
.hero__img {
  position: absolute; inset: 0;
  background: url(../assets/images/hero-banner.jpg) center/cover no-repeat;
  animation: kenburns 20s ease-in-out infinite alternate;
}
@keyframes kenburns {
  0% { transform: scale(1) translate(0, 0); }
  100% { transform: scale(1.08) translate(-1.5%, -1.5%); }
}
/* 网格线（弱化） */
.hero__grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, .04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .04) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, #000 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at center, #000 30%, transparent 80%);
}
/* 扫描线：8 秒循环从顶到底（砖橙色调） */
.hero__scanline {
  position: absolute; left: 0; right: 0; top: 0; height: 140px;
  background: linear-gradient(180deg, transparent, rgba(200, 70, 44, .1) 50%, rgba(232, 164, 140, .35) 95%, transparent);
  filter: blur(1px);
  animation: scan 8s linear infinite;
}
@keyframes scan {
  0% { transform: translateY(-140px); opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { transform: translateY(100vh); opacity: 0; }
}
/* 暖深蒙版：让左侧文案可读 */
.hero__vignette {
  position: absolute; inset: 0;
  background:
    linear-gradient(90deg, var(--c-mask-strong) 0%, rgba(28, 20, 12, .45) 50%, var(--c-mask) 100%),
    radial-gradient(ellipse at 70% 50%, transparent 30%, rgba(20, 14, 8, .6) 100%);
}
/* 飘尘粒子 */
.hero__particle {
  position: absolute; left: var(--x); top: var(--y);
  width: 3px; height: 3px; border-radius: 50%;
  background: var(--c-accent-soft);
  box-shadow: 0 0 8px var(--c-accent-soft);
  opacity: 0;
  animation: float 6s ease-in-out infinite;
  animation-delay: var(--d);
}
@keyframes float {
  0%, 100% { opacity: 0; transform: translate(0, 0); }
  50% { opacity: .85; transform: translate(20px, -30px); }
}

/* Hero 内容 */
.hero__inner {
  position: relative; z-index: 2;
  display: grid; grid-template-columns: 1.1fr .9fr; gap: 60px; align-items: center;
}
.hero__copy { max-width: 600px; }
.hero__tag {
  display: inline-flex; align-items: center; height: 30px; padding: 0 14px;
  font-size: 12px; font-weight: 600; letter-spacing: .1em;
  color: var(--c-accent-soft);
  background: rgba(200, 70, 44, .14);
  border: 1px solid rgba(232, 164, 140, .35);
  border-radius: 999px;
}
.hero__title {
  margin-top: 24px;
  font-size: 64px; line-height: 1.1; font-weight: 800;
  color: var(--c-on-deep); letter-spacing: -.02em;
}
.hero__title-accent {
  display: block; margin-top: 8px;
  background: linear-gradient(120deg, var(--c-accent-soft) 10%, #f5d4c5 50%, #fff 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero__desc {
  margin-top: 24px; font-size: 17px; line-height: 1.7;
  color: var(--c-on-deep-soft);
}
.hero__desc strong { color: var(--c-accent-soft); font-weight: 600; }
.hero__actions { margin-top: 36px; display: flex; gap: 14px; flex-wrap: wrap; }

/* 数据徽章 2×2 玻璃态 */
.hero__badges {
  display: grid; grid-template-columns: 1fr 1fr; gap: 16px;
}
.badge {
  padding: 28px 22px;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, .08);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(255, 255, 255, .14);
  transition: transform .35s var(--ease), background .35s, border-color .35s;
}
.badge:hover {
  transform: translateY(-4px);
  background: rgba(200, 70, 44, .16);
  border-color: rgba(232, 164, 140, .45);
}
.badge__num {
  display: block; font-size: 36px; font-weight: 800; line-height: 1;
  color: #fff; font-family: "SF Mono", "DIN Alternate", -apple-system, sans-serif;
  letter-spacing: -.02em;
}
.badge__label {
  display: block; margin-top: 10px; font-size: 13px;
  color: var(--c-on-deep-soft);
}

/* 滚动提示 */
.hero__scroll {
  position: absolute; bottom: 30px; left: 50%; transform: translateX(-50%);
  z-index: 2; display: flex; flex-direction: column; align-items: center; gap: 10px;
  color: var(--c-on-deep-soft); font-size: 11px; letter-spacing: .3em;
}
.hero__scroll i {
  display: block; width: 1px; height: 40px;
  background: linear-gradient(180deg, var(--c-accent-soft), transparent);
  position: relative;
}
.hero__scroll i::after {
  content: ""; position: absolute; top: 0; left: -2px; width: 5px; height: 8px;
  background: var(--c-accent-soft); border-radius: 3px;
  animation: scrollDot 2s var(--ease) infinite;
}
@keyframes scrollDot {
  0% { transform: translateY(0); opacity: 1; }
  100% { transform: translateY(32px); opacity: 0; }
}


/* ============================================================
   业务痛点（明亮暖白）
   ============================================================ */
.painpoints { background: var(--c-bg); }
.painpoints__grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
  align-items: stretch;
}

.pain-card {
  position: relative;
  padding: 36px 30px 28px;
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  transition: transform .35s var(--ease), box-shadow .35s, border-color .35s;
  display: flex; flex-direction: column;
}
.pain-card::before {
  content: ""; position: absolute; top: 0; left: 30px; right: 30px; height: 3px;
  background: linear-gradient(90deg, var(--c-accent), transparent);
  border-radius: 0 0 3px 3px;
  opacity: 0; transition: opacity .35s;
}
.pain-card:hover {
  transform: translateY(-6px);
  border-color: transparent;
  box-shadow: 0 24px 60px -20px rgba(31, 24, 18, .2);
}
.pain-card:hover::before { opacity: 1; }
.pain-card__num {
  font-size: 15px; color: var(--c-ink-soft); margin-bottom: 18px;
  font-weight: 500;
}
.pain-card__num strong {
  font-size: 30px; font-weight: 800; color: var(--c-accent);
  font-family: "SF Mono", "DIN Alternate", -apple-system, sans-serif;
  margin-left: 4px;
}
.pain-card__title {
  font-size: 20px; color: var(--c-ink); margin-bottom: 14px;
}
.pain-card__desc {
  font-size: 14px; color: var(--c-ink-soft); line-height: 1.75;
}
.pain-card__source {
  margin-top: auto; padding-top: 14px;
  border-top: 1px dashed var(--c-border);
  font-size: 12px; color: var(--c-ink-mute);
}


/* ============================================================
   产品矩阵（明亮偏米灰底）
   ============================================================ */
.products { background: var(--c-bg-soft); }

/* 主推大卡（暖深色，配二维码视觉） */
.feature-card {
  position: relative;
  display: grid; grid-template-columns: 1.2fr .8fr; gap: 40px;
  align-items: center;
  padding: 48px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, #2a1f15 0%, #1f1812 100%);
  color: var(--c-on-deep);
  overflow: hidden;
  margin-bottom: 24px;
}
.feature-card__glow {
  position: absolute; top: -100px; right: -100px;
  width: 400px; height: 400px; border-radius: 50%;
  background: radial-gradient(circle, var(--c-accent-glow), transparent 70%);
  pointer-events: none;
}
.feature-card__body { position: relative; z-index: 2; }
.feature-card__tag {
  display: inline-flex; align-items: center; height: 26px; padding: 0 12px;
  font-size: 11px; font-weight: 600; letter-spacing: .1em;
  color: var(--c-accent-soft); background: rgba(200, 70, 44, .18);
  border-radius: 999px;
}
.feature-card__title {
  margin-top: 18px; font-size: 42px; font-weight: 800;
  background: linear-gradient(120deg, #fff, var(--c-accent-soft));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.feature-card__desc {
  margin-top: 16px; font-size: 15px; color: var(--c-on-deep-soft); line-height: 1.8;
}
.feature-card__tags {
  margin-top: 22px; display: flex; flex-wrap: wrap; gap: 8px;
}
.feature-card__tags span {
  padding: 6px 12px; font-size: 12px;
  color: var(--c-on-deep-soft);
  border: 1px solid var(--c-border-deep);
  border-radius: 999px;
}

/* 视觉化的二维码装饰 */
.feature-card__visual {
  position: relative; z-index: 2;
  display: flex; align-items: center; justify-content: center;
}
.qr-mock {
  position: relative; width: 200px; height: 200px;
  padding: 16px; background: rgba(255, 255, 255, .05);
  border: 1px solid var(--c-border-deep);
  border-radius: var(--radius);
}
.qr-mock__grid {
  width: 100%; height: 100%;
  display: grid; grid-template-columns: repeat(5, 1fr); gap: 4px;
}
.qr-mock__grid span {
  background: rgba(255, 255, 255, .1); border-radius: 2px;
  animation: qrBlink 3s infinite;
}
.qr-mock__grid span:nth-child(odd) { animation-delay: .3s; }
.qr-mock__grid span:nth-child(3n) { animation-delay: .9s; background: rgba(255, 255, 255, .22); }
.qr-mock__grid span:nth-child(7n) { background: var(--c-accent); opacity: .7; }
@keyframes qrBlink {
  0%, 100% { opacity: .4; }
  50% { opacity: 1; }
}
.qr-mock__scan {
  position: absolute; left: 16px; right: 16px; top: 16px;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--c-accent-soft), transparent);
  box-shadow: 0 0 14px var(--c-accent-soft);
  animation: qrScan 2.4s ease-in-out infinite;
}
@keyframes qrScan {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(168px); }
}

/* 四端产品卡 */
.products__grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
}
.prod-card {
  position: relative;
  padding: 30px 24px;
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  transition: transform .35s var(--ease), box-shadow .35s, border-color .35s;
}
.prod-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 24px 50px -20px rgba(31, 24, 18, .16);
  border-color: transparent;
}
.prod-card__icon {
  width: 52px; height: 52px; border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, rgba(200, 70, 44, .12), rgba(42, 94, 69, .1));
  color: var(--c-accent);
  margin-bottom: 18px;
}
.prod-card__title { font-size: 18px; color: var(--c-ink); margin-bottom: 10px; }
.prod-card__desc { font-size: 13px; color: var(--c-ink-soft); line-height: 1.7; }
.prod-card__tags {
  margin-top: 16px; display: flex; flex-wrap: wrap; gap: 6px;
}
.prod-card__tags span {
  padding: 4px 10px; font-size: 11px;
  color: var(--c-ink-soft); background: var(--c-bg-mute);
  border-radius: 999px;
}
.prod-card__link {
  display: inline-block; margin-top: 18px;
  font-size: 13px; font-weight: 600; color: var(--c-accent);
  transition: gap .2s, color .2s;
}
.prod-card__link:hover { color: var(--c-accent-2); }


/* ============================================================
   全链路流程（沉浸：物流实拍大图）
   ============================================================ */
.workflow {
  position: relative;
  background: var(--c-deep);
  color: var(--c-on-deep);
  overflow: hidden;
}
.workflow__bg { position: absolute; inset: 0; pointer-events: none; }
/* 物流实拍大图 */
.workflow__img {
  position: absolute; inset: 0;
  background: url(../assets/images/workflow-logistics.jpg) center/cover no-repeat fixed;
}
.workflow__grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, .04) 1px, transparent 1px);
  background-size: 100% 80px;
}
/* Workflow 整体加暖深蒙版保证文字可读 */
.workflow__bg::after {
  content: ""; position: absolute; inset: 0;
  background:
    linear-gradient(180deg, rgba(20, 14, 8, .85) 0%, rgba(28, 20, 12, .7) 50%, rgba(20, 14, 8, .85) 100%);
}

.workflow .container { position: relative; z-index: 2; }

/* 流程节点 */
.flow {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 0;
  position: relative; margin-top: 20px;
}
/* 节点间连接线 */
.flow::before {
  content: ""; position: absolute; top: 42px; left: 12.5%; right: 12.5%;
  height: 2px;
  background: var(--c-border-deep);
}
.flow__node {
  position: relative; text-align: center; padding: 0 16px;
  opacity: .35; transition: opacity .6s var(--ease);
}
.flow__node.is-active { opacity: 1; }

.flow__dot {
  position: relative; z-index: 2;
  width: 84px; height: 84px; margin: 0 auto 22px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: rgba(255, 255, 255, .06);
  border: 2px solid var(--c-border-deep);
  color: var(--c-on-deep-soft);
  backdrop-filter: blur(8px);
  transition: all .5s var(--ease);
}
.flow__node.is-active .flow__dot {
  background: linear-gradient(135deg, var(--c-accent), var(--c-accent-2));
  border-color: var(--c-accent-soft);
  color: #fff;
  box-shadow: 0 0 0 6px rgba(200, 70, 44, .15), 0 0 40px var(--c-accent-glow);
  transform: scale(1.05);
}
.flow__step {
  display: block; font-size: 11px; font-weight: 600; letter-spacing: .2em;
  color: var(--c-accent-soft); margin-bottom: 8px;
}
.flow__title { font-size: 18px; color: var(--c-on-deep); margin-bottom: 10px; }
.flow__desc {
  font-size: 13px; color: var(--c-on-deep-soft); line-height: 1.7;
  max-width: 220px; margin: 0 auto;
}
.flow__tech {
  margin-top: 14px; font-size: 12px; color: var(--c-accent-soft);
  opacity: 0; transform: translateY(6px);
  transition: opacity .5s .2s, transform .5s .2s;
}
.flow__node.is-active .flow__tech {
  opacity: 1; transform: translateY(0);
}


/* ============================================================
   数据见证（明亮暖白）
   ============================================================ */
.data { background: var(--c-bg); }
.data__grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
}
.data-card {
  padding: 30px 26px;
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  transition: transform .35s var(--ease), box-shadow .35s;
}
.data-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 18px 40px -16px rgba(31, 24, 18, .14);
}
.data-card__icon {
  width: 40px; height: 40px; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  background: var(--c-bg-soft); border: 1px solid var(--c-border);
  color: var(--c-accent); margin-bottom: 18px;
}
.data-card__num {
  font-size: 40px; font-weight: 800; line-height: 1; color: var(--c-ink);
  font-family: "SF Mono", "DIN Alternate", -apple-system, sans-serif;
  letter-spacing: -.02em;
}
.data-card__label {
  margin-top: 8px; font-size: 14px; font-weight: 600; color: var(--c-ink);
}
.data-card__desc {
  margin-top: 8px; font-size: 12px; color: var(--c-ink-mute); line-height: 1.6;
  min-height: 38px;
}
.data-card__bar {
  margin-top: 16px; height: 4px; border-radius: 2px;
  background: var(--c-bg-mute); overflow: hidden;
}
.data-card__bar i {
  display: block; height: 100%; width: 0;
  background: linear-gradient(90deg, var(--c-accent), var(--c-accent-soft));
  border-radius: 2px;
  transition: width 1.6s var(--ease-expo);
}
.data-card.is-shown .data-card__bar i { width: var(--w); }


/* ============================================================
   客户案例（明亮偏米灰底 + 案例配图）
   ============================================================ */
.cases { background: var(--c-bg-soft); }

/* logo 墙 */
.logo-wall {
  display: grid; grid-template-columns: repeat(6, 1fr); gap: 16px;
  margin-bottom: 40px;
}
.logo-wall__item {
  height: 80px;
  display: flex; align-items: center; justify-content: center;
  background: #fff; border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  font-size: 13px; color: var(--c-ink-mute); font-weight: 500;
  filter: grayscale(1); opacity: .7;
  transition: all .35s var(--ease);
}
.logo-wall__item:hover {
  filter: grayscale(0); opacity: 1;
  color: var(--c-ink); border-color: var(--c-accent);
  transform: translateY(-3px);
}

/* 深度案例卡 */
.case-card {
  display: grid; grid-template-columns: .85fr 1.15fr; gap: 0;
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.case-card__side {
  position: relative;
  padding: 40px 36px;
  color: var(--c-on-deep);
  overflow: hidden;
}
/* 案例配图：宠物食品产线 */
.case-card__bg {
  position: absolute; inset: 0;
  background: url(../assets/images/case-pet.jpg) center/cover no-repeat;
}
.case-card__side::before {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(160deg, rgba(31, 24, 18, .92) 0%, rgba(42, 31, 21, .78) 100%);
}
.case-card__side > * { position: relative; z-index: 2; }
.case-card__tag {
  display: inline-flex; align-items: center; height: 24px; padding: 0 10px;
  font-size: 11px; font-weight: 600; letter-spacing: .1em;
  color: var(--c-accent-soft); background: rgba(200, 70, 44, .2);
  border-radius: 999px;
}
.case-card__brand {
  margin-top: 16px; font-size: 26px; color: #fff;
}
.case-card__meta {
  margin-top: 10px; font-size: 13px; color: var(--c-on-deep-soft);
  display: flex; gap: 8px;
}
.case-card__results {
  margin-top: 36px; display: flex; flex-direction: column; gap: 18px;
}
.result { display: flex; flex-direction: column; gap: 4px; }
.result__num {
  font-size: 22px; font-weight: 800; color: var(--c-accent-soft);
  font-family: "SF Mono", "DIN Alternate", -apple-system, sans-serif;
}
.result__label { font-size: 12px; color: var(--c-on-deep-soft); }

.case-card__body { padding: 40px 36px; }
.case-card__block { margin-bottom: 22px; }
.case-card__block h4 {
  font-size: 13px; font-weight: 600; color: var(--c-accent);
  letter-spacing: .05em; margin-bottom: 8px;
}
.case-card__block p {
  font-size: 14px; color: var(--c-ink-soft); line-height: 1.8;
}
.case-card__quote {
  margin-top: 24px; padding: 18px 20px;
  background: var(--c-bg-soft); border-left: 3px solid var(--c-accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 14px; color: var(--c-ink); font-weight: 500; line-height: 1.7;
}


/* ============================================================
   行业场景（明亮 + 真实行业大图）
   ============================================================ */
.industries { background: var(--c-bg); }
.industries__grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px;
}
.ind-card {
  position: relative;
  padding: 32px 28px;
  border-radius: var(--radius-lg);
  background-image: var(--img);
  background-size: cover; background-position: center;
  color: #fff;
  min-height: 240px;
  overflow: hidden;
  transition: transform .4s var(--ease), box-shadow .4s;
}
/* 暖深渐变蒙版，保证文字可读且统一色调 */
.ind-card::before {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(160deg, rgba(31, 24, 18, .55) 0%, rgba(20, 14, 8, .88) 100%);
  transition: opacity .4s;
}
.ind-card::after {
  content: ""; position: absolute; top: -50%; right: -30%;
  width: 200px; height: 200px; border-radius: 50%;
  background: rgba(200, 70, 44, .25);
  filter: blur(30px);
  opacity: 0;
  transition: opacity .5s, transform .6s var(--ease);
}
.ind-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 30px 60px -20px rgba(31, 24, 18, .4);
}
.ind-card:hover::after { opacity: 1; transform: scale(1.4); }
.ind-card:hover::before { opacity: .92; }

.ind-card > * { position: relative; z-index: 2; }
.ind-card__no {
  font-size: 13px; font-weight: 600; letter-spacing: .2em;
  color: var(--c-accent-soft);
  opacity: .85;
}
.ind-card__name {
  display: block; margin-top: 12px;
  font-size: 26px; font-weight: 700;
}
.ind-card__desc {
  margin-top: 12px; font-size: 13px; line-height: 1.7;
  color: rgba(255, 255, 255, .85);
}
.ind-card__data {
  display: inline-block; margin-top: 18px;
  font-size: 12px; font-weight: 600;
  padding: 5px 12px;
  background: rgba(255, 255, 255, .18);
  border-radius: 999px;
  backdrop-filter: blur(6px);
}
.ind-card__arrow {
  position: absolute; bottom: 28px; right: 28px;
  font-size: 18px; font-weight: 700; color: var(--c-accent-soft);
  transition: transform .35s var(--ease);
}
.ind-card:hover .ind-card__arrow { transform: translateX(6px); }


/* ============================================================
   CTA 收口（沉浸：大图背景）
   ============================================================ */
.cta {
  position: relative;
  padding: 110px 0;
  background: var(--c-deep);
  overflow: hidden;
}
.cta__bg { position: absolute; inset: 0; pointer-events: none; }
/* CTA 大图 */
.cta__img {
  position: absolute; inset: 0;
  background: url(../assets/images/cta-bg.jpg) center/cover no-repeat;
}
.cta__grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, .03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, #000 20%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, #000 20%, transparent 70%);
}
/* 暖深蒙版 */
.cta__bg::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(20, 14, 8, .82), rgba(28, 20, 12, .72));
}
.cta__inner {
  position: relative; z-index: 2; text-align: center;
  max-width: 720px; margin: 0 auto;
}
.cta__title {
  font-size: 44px; font-weight: 800; color: #fff;
  letter-spacing: -.02em;
}
.cta__desc {
  margin-top: 16px; font-size: 17px; color: var(--c-on-deep-soft);
}
.cta__btn { margin-top: 32px; }


/* ============================================================
   Footer 页脚（暖深色，非蓝黑）
   ============================================================ */
.footer {
  background: #15100A;
  color: var(--c-on-deep-soft);
  padding-top: 70px;
}
.footer__inner {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px;
  padding-bottom: 50px;
}
.footer__brand .logo { color: #fff; }
.footer__slogan {
  margin-top: 18px; font-size: 13px; line-height: 1.7;
  color: var(--c-on-deep-soft); max-width: 320px;
}
.footer__email {
  display: inline-block; margin-top: 14px;
  font-size: 14px; color: var(--c-accent-soft); font-weight: 500;
}
.footer__col h4 {
  font-size: 13px; font-weight: 600; color: #fff;
  letter-spacing: .1em; margin-bottom: 16px;
}
.footer__col a, .footer__col span {
  display: block; padding: 6px 0; font-size: 14px;
  color: var(--c-on-deep-soft); transition: color .2s;
}
.footer__col a:hover { color: var(--c-accent-soft); }
.footer__contact {
  display: inline-block; margin-top: 8px;
  padding: 8px 16px !important;
  border: 1px solid var(--c-border-deep);
  border-radius: 999px; color: var(--c-accent-soft) !important;
  font-size: 13px !important; font-weight: 500;
  transition: all .25s;
}
.footer__contact:hover { background: rgba(200, 70, 44, .12); }
.footer__bottom {
  border-top: 1px solid var(--c-border-deep);
  padding: 22px 0;
  font-size: 12px; color: var(--c-ink-mute);
  text-align: center;
}


/* ============================================================
   联系我们弹窗
   ============================================================ */
.modal {
  position: fixed; inset: 0; z-index: 200;
  display: none; align-items: center; justify-content: center;
  padding: 24px;
}
.modal.is-open { display: flex; }
.modal__mask {
  position: absolute; inset: 0;
  background: rgba(20, 14, 8, .72);
  backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
  animation: fadeIn .3s;
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.modal__panel {
  position: relative; z-index: 2;
  width: 100%; max-width: 460px;
  background: var(--c-bg);
  border-radius: var(--radius-lg);
  padding: 40px 36px;
  box-shadow: 0 30px 80px -20px rgba(0, 0, 0, .5);
  animation: panelIn .4s var(--ease-expo);
}
@keyframes panelIn {
  from { opacity: 0; transform: translateY(20px) scale(.96); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}
.modal__close {
  position: absolute; top: 16px; right: 18px;
  width: 32px; height: 32px;
  font-size: 26px; line-height: 1; color: var(--c-ink-mute);
  border-radius: 50%;
  transition: all .2s;
}
.modal__close:hover { color: var(--c-ink); background: var(--c-bg-mute); }

.modal__page { display: none; }
.modal__page.is-active { display: block; animation: fadeIn .35s; }
.modal__page--success { text-align: center; padding: 20px 0; }

.modal__title { font-size: 24px; color: var(--c-ink); }
.modal__desc {
  margin-top: 10px; font-size: 14px; color: var(--c-ink-soft); line-height: 1.7;
}

/* 表单 */
.form { margin-top: 28px; }
.form__field { display: block; margin-bottom: 16px; }
.form__field span {
  display: block; font-size: 13px; font-weight: 500;
  color: var(--c-ink-soft); margin-bottom: 6px;
}
.form__field span i { color: #d12d2d; font-style: normal; }
.form__field input, .form__field select {
  width: 100%; height: 44px;
  padding: 0 14px;
  background: #fff;
  border: 1.5px solid var(--c-border);
  border-radius: var(--radius-sm);
  color: var(--c-ink); font-size: 14px;
  transition: border-color .2s, background .2s;
}
.form__field input:focus, .form__field select:focus {
  outline: none; border-color: var(--c-accent);
}
.form__actions {
  margin-top: 24px;
  display: flex; gap: 12px; justify-content: flex-end;
}

/* 成功页 */
.success-icon {
  margin-bottom: 20px;
  display: inline-flex;
}
.success-icon__circle {
  stroke-dasharray: 151; stroke-dashoffset: 151;
  animation: drawCircle .8s var(--ease-expo) forwards;
}
.success-icon__check {
  stroke-dasharray: 40; stroke-dashoffset: 40;
  animation: drawCheck .5s .6s var(--ease-expo) forwards;
}
@keyframes drawCircle { to { stroke-dashoffset: 0; } }
@keyframes drawCheck { to { stroke-dashoffset: 0; } }
.modal__page--success .modal__desc { max-width: 340px; margin-left: auto; margin-right: auto; }
.modal__page--success .btn { margin-top: 28px; }


/* ============================================================
   滚动入场动画（通用）
   ============================================================ */
.reveal {
  opacity: 0; transform: translateY(30px);
  transition: opacity .8s var(--ease-expo), transform .8s var(--ease-expo);
  transition-delay: var(--delay, 0s);
}
.reveal.is-shown { opacity: 1; transform: translateY(0); }


/* ============================================================
   子页面通用 · Page Hero（比首页矮，居中）
   ============================================================ */
.page-hero {
  position: relative;
  padding: 160px 0 80px;
  background: var(--c-deep);
  overflow: hidden;
  text-align: center;
}
.page-hero__bg { position: absolute; inset: 0; pointer-events: none; }
.page-hero__img {
  position: absolute; inset: 0;
  background-size: cover; background-position: center;
}
.page-hero__bg::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(20, 14, 8, .82) 0%, rgba(28, 20, 12, .7) 100%);
}
.page-hero__inner { position: relative; z-index: 2; max-width: 820px; margin: 0 auto; }
.page-hero__eyebrow {
  display: inline-block; font-size: 12px; font-weight: 600; letter-spacing: .3em;
  color: var(--c-accent-soft); margin-bottom: 18px;
}
.page-hero__title {
  font-size: 48px; font-weight: 800; color: var(--c-on-deep); line-height: 1.2;
  letter-spacing: -.02em;
}
.page-hero__desc {
  margin-top: 18px; font-size: 16px; color: var(--c-on-deep-soft); line-height: 1.8;
}
/* 子页面 Hero 能力徽章 */
.page-hero__badges {
  margin-top: 36px; display: flex; gap: 14px; justify-content: center; flex-wrap: wrap;
}
.page-hero__badge {
  display: inline-flex; align-items: center; gap: 8px;
  height: 38px; padding: 0 18px;
  font-size: 13px; font-weight: 600;
  color: var(--c-accent-soft);
  background: rgba(200, 70, 44, .12);
  border: 1px solid rgba(232, 164, 140, .3);
  border-radius: 999px;
}
.page-hero__badge::before {
  content: ""; width: 6px; height: 6px; border-radius: 50%;
  background: var(--c-accent-soft);
}


/* ============================================================
   产品中心 product.html
   ============================================================ */
/* 产品导航 tabs */
.prod-tabs {
  position: sticky; top: 64px; z-index: 50;
  background: rgba(251, 248, 243, .92);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--c-border);
}
.prod-tabs__inner {
  display: flex; gap: 8px; justify-content: center; padding: 14px 24px;
  max-width: var(--container); margin: 0 auto; overflow-x: auto;
}
.prod-tabs__item {
  flex: 0 0 auto;
  padding: 10px 22px;
  font-size: 14px; font-weight: 600;
  color: var(--c-ink-soft);
  border-radius: 999px;
  border: 1px solid transparent;
  transition: all .25s;
  white-space: nowrap;
}
.prod-tabs__item:hover { color: var(--c-ink); border-color: var(--c-border); }
.prod-tabs__item.active {
  color: #fff; background: var(--c-accent); border-color: var(--c-accent);
}

/* 产品详情区：切换式，默认隐藏，active 显示 */
.prod-detail { display: none; padding: 90px 0; }
.prod-detail.active { display: block; animation: fadeIn .4s; }
.prod-detail__inner {
  display: grid; grid-template-columns: .85fr 1.15fr; gap: 56px; align-items: center;
}
.prod-detail--reverse .prod-detail__inner { direction: rtl; }
.prod-detail--reverse .prod-detail__inner > * { direction: ltr; }

/* 左侧视觉 */
.prod-detail__visual {
  position: relative;
  aspect-ratio: 4 / 3;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: linear-gradient(135deg, #2a1f15, #1f1812);
}
.prod-detail__visual img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform .6s var(--ease);
}
.prod-detail__visual:hover img { transform: scale(1.05); }
.prod-detail__visual::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(160deg, transparent 50%, rgba(20, 14, 8, .5));
}
/* PDA、稽查、代理商截图适配原始尺寸 */
.prod-detail[data-prod="pda"] .prod-detail__visual,
.prod-detail[data-prod="inspect"] .prod-detail__visual,
.prod-detail[data-prod="agent"] .prod-detail__visual {
  aspect-ratio: auto; overflow: visible; background: none;
  display: flex; justify-content: center;
}
.prod-detail[data-prod="pda"] .prod-detail__visual img,
.prod-detail[data-prod="inspect"] .prod-detail__visual img,
.prod-detail[data-prod="agent"] .prod-detail__visual img {
  object-fit: contain; width: 100%; height: auto; display: block;
  max-width: 60%; border-radius: var(--radius-sm);
}
.prod-detail[data-prod="pda"] .prod-detail__visual::after,
.prod-detail[data-prod="inspect"] .prod-detail__visual::after,
.prod-detail[data-prod="agent"] .prod-detail__visual::after {
  display: none;
}
.prod-detail[data-prod="pda"] .prod-detail__visual:hover img,
.prod-detail[data-prod="inspect"] .prod-detail__visual:hover img,
.prod-detail[data-prod="agent"] .prod-detail__visual:hover img {
  transform: none;
}
/* 视觉上的大图标浮层 */
.prod-detail__icon-wrap {
  position: absolute; bottom: 28px; left: 28px; z-index: 2;
  width: 64px; height: 64px; border-radius: 16px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(251, 248, 243, .95);
  color: var(--c-accent);
  box-shadow: 0 12px 30px -8px rgba(0, 0, 0, .4);
}

/* 右侧内容 */
.prod-detail__head { margin-bottom: 28px; }
.prod-detail__slogan {
  font-size: 13px; font-weight: 600; letter-spacing: .1em;
  color: var(--c-accent); margin-bottom: 10px;
}
.prod-detail__title { font-size: 32px; color: var(--c-ink); }

/* 功能列表（8 项，2 列） */
.feat-list {
  display: grid; grid-template-columns: 1fr 1fr; gap: 14px 24px;
  margin-bottom: 28px;
}
.feat-list__item {
  display: flex; gap: 12px; align-items: flex-start;
}
.feat-list__no {
  flex: 0 0 26px; height: 26px; border-radius: 7px;
  display: flex; align-items: center; justify-content: center;
  font-size: 12px; font-weight: 700; color: var(--c-accent);
  background: rgba(200, 70, 44, .1);
  font-family: "SF Mono", "DIN Alternate", -apple-system, sans-serif;
}
.feat-list__txt strong {
  display: block; font-size: 14px; font-weight: 600; color: var(--c-ink); margin-bottom: 2px;
}
.feat-list__txt span {
  font-size: 12px; color: var(--c-ink-mute); line-height: 1.5;
}

/* 技术标签 */
.prod-detail__tags {
  display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 28px;
  padding-bottom: 28px; border-bottom: 1px solid var(--c-border);
}
.prod-detail__tags span {
  padding: 6px 12px; font-size: 12px; font-weight: 500;
  color: var(--c-green); background: rgba(42, 94, 69, .08);
  border-radius: 999px;
}

/* 业务价值数据（4 个） */
.value-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px;
}
.value-card {
  padding: 18px 14px;
  background: #fff; border: 1px solid var(--c-border);
  border-radius: var(--radius-sm); text-align: center;
}
.value-card__num {
  font-size: 22px; font-weight: 800; color: var(--c-accent); line-height: 1.2;
  font-family: "SF Mono", "DIN Alternate", -apple-system, sans-serif;
}
.value-card__label {
  margin-top: 6px; font-size: 12px; color: var(--c-ink-soft);
}


/* ============================================================
   解决方案 solution.html
   ============================================================ */
/* 行业 tabs */
.sol-tabs {
  position: sticky; top: 64px; z-index: 50;
  background: rgba(251, 248, 243, .92);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--c-border);
}
.sol-tabs__inner {
  display: flex; gap: 6px; justify-content: center; padding: 14px 24px;
  max-width: var(--container); margin: 0 auto; overflow-x: auto;
}
.sol-tabs__item {
  flex: 0 0 auto;
  padding: 10px 20px; font-size: 14px; font-weight: 600;
  color: var(--c-ink-soft); border-radius: 999px;
  border: 1px solid transparent;
  transition: all .25s; white-space: nowrap;
}
.sol-tabs__item:hover { color: var(--c-ink); border-color: var(--c-border); }
.sol-tabs__item.active {
  color: #fff; background: var(--c-accent); border-color: var(--c-accent);
}

/* 方案面板（默认隐藏） */
.sol-panel { display: none; padding: 80px 0; }
.sol-panel.active { display: block; animation: fadeIn .4s; }
.sol-panel__head {
  display: flex; align-items: center; gap: 16px; margin-bottom: 48px;
}
.sol-panel__no {
  font-size: 56px; font-weight: 800; color: var(--c-accent); line-height: 1;
  font-family: "SF Mono", "DIN Alternate", -apple-system, sans-serif;
  opacity: .25;
}
.sol-panel__name { font-size: 30px; color: var(--c-ink); }

/* 痛点 3 项 */
.sol-block { margin-bottom: 56px; }
.sol-block__title {
  font-size: 18px; font-weight: 700; color: var(--c-ink); margin-bottom: 20px;
  display: flex; align-items: center; gap: 10px;
}
.sol-block__title::before {
  content: ""; width: 4px; height: 18px; background: var(--c-accent); border-radius: 2px;
}
.sol-pain { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.sol-pain__item {
  padding: 26px 24px;
  background: #fff; border: 1px solid var(--c-border);
  border-radius: var(--radius);
}
.sol-pain__num {
  font-size: 26px; font-weight: 800; color: var(--c-accent); margin-bottom: 10px;
  font-family: "SF Mono", "DIN Alternate", -apple-system, sans-serif;
}
.sol-pain__desc { font-size: 14px; color: var(--c-ink-soft); line-height: 1.7; }

/* 方案流程图（横向步骤） */
.sol-flow {
  display: flex; align-items: stretch; gap: 0; flex-wrap: wrap;
  padding: 28px; background: #fff; border: 1px solid var(--c-border);
  border-radius: var(--radius);
}
.sol-flow__step {
  flex: 1; min-width: 120px;
  position: relative; padding: 0 18px;
  text-align: center; font-size: 13px; font-weight: 600; color: var(--c-ink);
}
.sol-flow__step:not(:last-child)::after {
  content: "->"; position: absolute; right: -6px; top: 50%; transform: translateY(-50%);
  color: var(--c-accent); font-weight: 700;
}
.sol-flow__step span {
  display: block; padding: 8px 4px; background: var(--c-bg-soft);
  border-radius: var(--radius-sm); margin-bottom: 6px;
}
.sol-flow__step em {
  font-style: normal; font-size: 11px; color: var(--c-ink-mute); font-weight: 400;
}

/* 核心能力 4 项 */
.sol-ability { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.sol-ability__item {
  padding: 26px 24px;
  background: #fff; border: 1px solid var(--c-border);
  border-radius: var(--radius);
  transition: transform .3s var(--ease), box-shadow .3s;
}
.sol-ability__item:hover {
  transform: translateY(-4px); box-shadow: 0 18px 40px -16px rgba(31, 24, 18, .14);
}
.sol-ability__no {
  display: inline-flex; width: 32px; height: 32px; border-radius: 8px;
  align-items: center; justify-content: center;
  font-size: 13px; font-weight: 700; color: var(--c-accent);
  background: rgba(200, 70, 44, .1); margin-bottom: 14px;
  font-family: "SF Mono", "DIN Alternate", -apple-system, sans-serif;
}
.sol-ability__item h4 { font-size: 16px; color: var(--c-ink); margin-bottom: 8px; }
.sol-ability__item p { font-size: 13px; color: var(--c-ink-soft); line-height: 1.7; }

/* 案例数据 */
.sol-case {
  display: flex; gap: 20px; flex-wrap: wrap;
  padding: 28px; border-radius: var(--radius);
  background: linear-gradient(135deg, #2a1f15, #1f1812);
  color: var(--c-on-deep);
}
.sol-case__label {
  flex: 0 0 100%; font-size: 13px; font-weight: 600; color: var(--c-accent-soft);
  letter-spacing: .1em;
}
.sol-case__item { flex: 1; min-width: 140px; }
.sol-case__num {
  font-size: 28px; font-weight: 800; color: var(--c-accent-soft); line-height: 1.2;
  font-family: "SF Mono", "DIN Alternate", -apple-system, sans-serif;
}
.sol-case__desc { font-size: 12px; color: var(--c-on-deep-soft); margin-top: 4px; }


/* ============================================================
   关于我们 about.html
   ============================================================ */
/* 关于正文（左文右图） */
.about-intro { padding: 110px 0; }
.about-intro__inner {
  display: grid; grid-template-columns: 1.1fr .9fr; gap: 60px; align-items: center;
}
.about-intro__no {
  font-size: 13px; font-weight: 600; letter-spacing: .2em; color: var(--c-accent);
  margin-bottom: 14px;
}
.about-intro__title { font-size: 36px; color: var(--c-ink); margin-bottom: 24px; }
.about-intro__text p {
  font-size: 15px; color: var(--c-ink-soft); line-height: 1.9; margin-bottom: 18px;
}
.about-intro__text p:last-child { margin-bottom: 0; }
/* 右侧图片 + 数据叠加 */
.about-intro__media {
  position: relative; border-radius: var(--radius-lg); overflow: hidden;
  aspect-ratio: 4 / 5;
}
.about-intro__media img { width: 100%; height: 100%; object-fit: cover; }
.about-intro__media::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(20, 14, 8, .7));
}
.about-intro__stats {
  position: absolute; bottom: 24px; left: 24px; right: 24px; z-index: 2;
  display: flex; gap: 16px;
}
.about-intro__stat {
  flex: 1; padding: 14px 12px;
  background: rgba(251, 248, 243, .92); backdrop-filter: blur(8px);
  border-radius: var(--radius-sm); text-align: center;
}
.about-intro__stat strong {
  display: block; font-size: 20px; font-weight: 800; color: var(--c-accent);
  font-family: "SF Mono", "DIN Alternate", -apple-system, sans-serif;
}
.about-intro__stat span { font-size: 11px; color: var(--c-ink-soft); }

/* 系统架构（复用首页 feature-card 风格） */
.arch-section { background: var(--c-bg-soft); }
.arch-hero-img {
  width: 100%; height: auto; display: block;
  border-radius: var(--radius);
  box-shadow: 0 24px 64px rgba(0,0,0,.5);
  border: 1px solid rgba(255,255,255,.1);
}
.arch-end-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: 32px;
}
.prod-card__img {
  margin-bottom: 16px; border-radius: var(--radius-sm); overflow: hidden;
  height: 140px;
}
.prod-card__img img {
  width: 100%; height: 100%; object-fit: cover; display: block;
}

/* 核心优势 */
.advantage-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px;
}
.advantage-card {
  position: relative;
  padding: 36px 32px;
  background: #fff; border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  transition: transform .35s var(--ease), box-shadow .35s;
}
.advantage-card:hover {
  transform: translateY(-4px); box-shadow: 0 20px 50px -18px rgba(31, 24, 18, .16);
}
.advantage-card__num {
  font-size: 13px; font-weight: 700; letter-spacing: .2em; color: var(--c-accent);
  margin-bottom: 14px;
  font-family: "SF Mono", "DIN Alternate", -apple-system, sans-serif;
}
.advantage-card__title { font-size: 22px; color: var(--c-ink); margin-bottom: 14px; }
.advantage-card__desc { font-size: 14px; color: var(--c-ink-soft); line-height: 1.8; }

/* 发展历程时间线 */
.timeline { position: relative; max-width: 900px; margin: 0 auto; }
/* 时间线竖线 */
.timeline::before {
  content: ""; position: absolute; left: 20px; top: 10px; bottom: 10px;
  width: 2px; background: var(--c-border);
}
.timeline__node {
  position: relative; padding-left: 64px; margin-bottom: 48px;
}
.timeline__node:last-child { margin-bottom: 0; }
/* 节点圆点 */
.timeline__node::before {
  content: ""; position: absolute; left: 12px; top: 6px;
  width: 18px; height: 18px; border-radius: 50%;
  background: #fff; border: 3px solid var(--c-border);
  transition: all .4s var(--ease);
}
.timeline__node.is-shown::before {
  border-color: var(--c-accent);
  background: var(--c-accent);
  box-shadow: 0 0 0 6px rgba(200, 70, 44, .15);
}
.timeline__year {
  font-size: 13px; font-weight: 700; letter-spacing: .1em; color: var(--c-accent);
  margin-bottom: 8px;
  font-family: "SF Mono", "DIN Alternate", -apple-system, sans-serif;
}
.timeline__title { font-size: 20px; color: var(--c-ink); margin-bottom: 10px; }
.timeline__desc { font-size: 14px; color: var(--c-ink-soft); line-height: 1.8; }

/* about 页 CTA 复用首页 .cta 样式，背景图换 about-team */
.about-cta .cta__img {
  background: url(../assets/images/about-team.jpg) center/cover no-repeat;
}


/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1080px) {
  .hero__title { font-size: 52px; }
  .products__grid { grid-template-columns: repeat(2, 1fr); }
  .data__grid { grid-template-columns: repeat(2, 1fr); }
  .industries__grid { grid-template-columns: repeat(2, 1fr); }
  /* 移动端关闭 fixed 背景附件，避免 iOS 卡顿 */
  .workflow__img { background-attachment: scroll; }
}

@media (max-width: 968px) {
  .section { padding: 80px 0; }
  .section__title { font-size: 30px; }
  .section__head { margin-bottom: 40px; }
  .section__head--split { flex-direction: column; align-items: flex-start; }
  .section__head-desc { text-align: left; }

  /* Header 移动端 */
  .nav, .header__cta { display: none; }
  .header__burger { display: block; }

  /* Hero */
  .hero { padding: 110px 0 60px; min-height: auto; }
  .hero__inner { grid-template-columns: 1fr; gap: 40px; }
  .hero__title { font-size: 42px; }
  .hero__scroll { display: none; }

  /* 痛点 */
  .painpoints__grid { grid-template-columns: 1fr; }
  .pain-card:nth-child(2), .pain-card:nth-child(3) { margin-top: 0; }

  /* 产品矩阵 */
  .feature-card { grid-template-columns: 1fr; padding: 32px; }
  .feature-card__title { font-size: 32px; }
  .feature-card__visual { display: none; }
  .products__grid { grid-template-columns: 1fr; }

  /* 流程 */
  .flow { grid-template-columns: 1fr; gap: 40px; }
  .flow::before { display: none; }
  .flow__dot { margin-bottom: 16px; }

  /* 数据 */
  .data__grid { grid-template-columns: repeat(2, 1fr); }

  /* 案例 */
  .case-card { grid-template-columns: 1fr; }
  .logo-wall { grid-template-columns: repeat(3, 1fr); }

  /* 行业 */
  .industries__grid { grid-template-columns: 1fr; }

  /* CTA */
  .cta { padding: 80px 0; }
  .cta__title { font-size: 32px; }

  /* 子页面 Hero */
  .page-hero { padding: 130px 0 60px; }
  .page-hero__title { font-size: 34px; }

  /* 产品详情 */
  .prod-detail { padding: 64px 0; }
  .prod-detail__inner { grid-template-columns: 1fr; gap: 32px; }
  .prod-detail--reverse .prod-detail__inner { direction: ltr; }

  .feat-list { grid-template-columns: 1fr; }
  .value-grid { grid-template-columns: repeat(2, 1fr); }

  /* 解决方案 */
  .sol-pain { grid-template-columns: 1fr; }
  .sol-ability { grid-template-columns: 1fr; }
  .sol-flow__step { min-width: 45%; }

  /* 关于 */
  .about-intro__inner { grid-template-columns: 1fr; gap: 40px; }
  .about-intro__media { aspect-ratio: 4 / 3; max-width: 480px; }
  .advantage-grid { grid-template-columns: 1fr; }
  .arch-end-grid { grid-template-columns: repeat(2, 1fr); }
  .arch-section .feature-card__visual { display: flex; }
  .prod-card__img { height: 100px; }

  /* Footer */
  .footer__inner { grid-template-columns: 1fr 1fr; gap: 32px; }
}

@media (max-width: 560px) {
  .container { padding: 0 18px; }
  .hero__title { font-size: 34px; }
  .hero__badges { grid-template-columns: 1fr 1fr; gap: 12px; }
  .badge { padding: 20px 16px; }
  .badge__num { font-size: 28px; }
  .data__grid { grid-template-columns: 1fr; }
  .logo-wall { grid-template-columns: repeat(2, 1fr); }
  .footer__inner { grid-template-columns: 1fr; }
  .modal__panel { padding: 32px 24px; }
  .arch-end-grid { grid-template-columns: 1fr; }

}

/* 减弱动画偏好 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
  }
  .hero__img, .workflow__img { animation: none; }
}