/* =========================================================
   济南巨成信息技术有限公司 · 企业官网样式
   依据《视觉设计规范.md》实现：设计 token 全部以 CSS 变量统一管理。
   ========================================================= */

/* ---------- 0. 设计 Token ---------- */
:root {
  /* 品牌色 */
  --c-primary: #1F5FFF;       /* 信任蓝 600 */
  --c-primary-700: #1A4FCC;   /* 信任蓝 700（hover/保证对比 AA） */
  --c-primary-50: #EAF1FF;    /* 蓝 50（标签/次级 hover 底） */
  --c-ink: #0A2540;           /* 墨蓝 900 */
  --c-accent: #12C8D9;        /* 电光青（强调，少量） */

  /* 浅色主题 */
  --bg-base: #FFFFFF;
  --bg-subtle: #F5F7FA;
  --bg-muted: #EEF2F7;
  --text-primary: #0F1B2D;
  --text-secondary: #4A5568;
  --text-tertiary: #5C6675;
  --text-inverse: #FFFFFF;
  --border: #E2E8F0;
  --border-strong: #CBD5E1;

  /* 深色主题 */
  --bg-dark: #0A1B33;
  --bg-dark-elevated: #122A4A;
  --bg-dark-glass: rgba(255, 255, 255, 0.06);
  --text-onDark: #FFFFFF;
  --text-onDark-2: #B6C4DA;
  --text-onDark-muted: #7A8AA6;
  --link-onDark: #4FD6E6;
  --border-onDark: rgba(255, 255, 255, 0.1);

  /* 语义色（状态，非主视觉） */
  --c-success: #1FA971;
  --c-warn: #E0A106;
  --c-danger: #C0392B; /* L2：满足小字 AA 4.5:1（原 #D64545 对比不足） */

  /* 字体栈 */
  --font: "Inter", "Source Han Sans SC", "Noto Sans SC", "PingFang SC",
          "Microsoft YaHei", "Hiragino Sans GB", sans-serif;

  /* 字号层级 */
  --fs-hero: 56px;
  --fs-section: 32px;
  --fs-subtitle: 20px;
  --fs-body: 16px;
  --fs-caption: 14px;
  --fs-stat: 40px;
  --fs-nav: 15px;

  /* 圆角 */
  --r-card: 12px;
  --r-btn: 8px;
  --r-input: 8px;
  --r-pill: 999px;

  /* 阴影：双层柔和 */
  --shadow-base: 0 1px 2px rgba(16, 24, 40, 0.04), 0 8px 24px rgba(16, 24, 40, 0.08);
  --shadow-hover: 0 2px 4px rgba(16, 24, 40, 0.06), 0 16px 40px rgba(16, 24, 40, 0.12);

  /* 间距（8px 基线） */
  --s-2: 16px;
  --s-3: 24px;
  --s-4: 32px;
  --s-5: 40px;
  --s-6: 48px;
  --s-8: 64px;
  --s-12: 96px;

  /* 布局 */
  --container: 1200px;
  --gutter: 24px;
  --section-pad: 96px;
  --nav-h: 68px;

  /* 统一缓动 */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ---------- 1. 基础重置 ---------- */
*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: var(--nav-h); -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font);
  font-size: var(--fs-body);
  line-height: 1.7;
  color: var(--text-primary);
  background: var(--bg-base);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, p, ul, dl, dd, figure { margin: 0; }
ul, ol { list-style: none; padding: 0; }
/* 兜底：即便 <ol class="hero__dots"> 在窄屏 flex 容器里被某些 UA
   重新当 ordered list 渲染，也看不到 1./2./3. 序号 */
ol { list-style: none; }

img, svg { display: block; max-width: 100%; }

a { color: var(--c-primary); text-decoration: none; }

/* 焦点可见 ring（键盘） */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--c-primary);
  outline-offset: 2px;
  border-radius: 4px;
}

/* 跳到主内容（可访问性） */
.skip-link {
  position: absolute;
  left: 16px; top: -60px;
  z-index: 1000;
  background: var(--c-primary); color: #fff;
  padding: 10px 16px; border-radius: var(--r-btn);
  transition: top .2s var(--ease);
}
.skip-link:focus { top: 12px; }

.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 var(--s-3); }

/* ---------- 2. 按钮 ---------- */
.btn {
  --btn-bg: var(--c-primary-700);
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 44px;
  padding: 0 24px;
  font-family: inherit; font-size: var(--fs-nav); font-weight: 600;
  line-height: 1.4;
  border: 0; border-radius: var(--r-btn);
  cursor: pointer;
  transition: background .2s var(--ease), color .2s var(--ease),
              transform .15s var(--ease), box-shadow .2s var(--ease), border-color .2s var(--ease);
  text-align: center;
}
.btn--lg { min-height: 48px; padding: 0 32px; font-size: 16px; }
.btn--block { width: 100%; }

.btn--primary {
  background: var(--c-primary-700); color: #fff;
  box-shadow: var(--shadow-base);
}
.btn--primary:hover {
  background: var(--c-primary);
  box-shadow: 0 8px 20px rgba(31, 95, 255, 0.35); /* 外发光 */
  transform: translateY(-1px);
}
.btn--primary:active { background: #153FA6; transform: translateY(0); }

.btn--ghost {
  background: transparent; color: var(--c-primary);
  border: 1.5px solid var(--c-primary);
}
.btn--ghost:hover { background: var(--c-primary-50); }
.btn--ghost:active { background: #DCE8FF; }

/* 深底场景下的主按钮保持不变即可（白字对比已满足 AA） */

/* ---------- 3. 标签 / 胶囊 ---------- */
.tag {
  display: inline-flex; align-items: center;
  min-height: 24px; padding: 2px 12px;
  font-size: 13px; font-weight: 500; line-height: 1;
  color: var(--c-primary-700); background: var(--c-primary-50);
  border: 1px solid var(--c-primary-50);
  border-radius: var(--r-pill);
}

/* ---------- 4. 导航栏 Sticky ---------- */
/* 修复：默认态自带深蓝玻璃底（不再 transparent + 反白押宝 Hero 透出），
   杜绝"白字白底"不可见风险；滚动后再切换为白玻璃底。 */
.nav {
  position: sticky; top: 0; z-index: 100;
  height: var(--nav-h);
  background: rgba(10, 26, 51, 0.72);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  transition: background .3s var(--ease), box-shadow .3s var(--ease), border-color .3s var(--ease);
}
.nav.is-solid {
  background: rgba(255, 255, 255, 0.92);
  border-bottom-color: var(--border);
  box-shadow: var(--shadow-base);
}
.nav__inner {
  height: 100%;
  display: flex; align-items: center; gap: var(--s-3);
}
/* 初始态：反白文字（始终与深蓝玻璃底形成清晰对比） */
.nav__logo { display: inline-flex; align-items: center; gap: 8px; color: #fff; font-weight: 600; }
.nav__logo-mark { color: currentColor; }
.nav__logo-text { font-size: 16px; letter-spacing: .5px; }

.nav__menu { margin-left: auto; }
.nav__list { display: flex; align-items: center; gap: 4px; }
.nav__link {
  position: relative;
  display: inline-flex; align-items: center;
  min-height: 44px; padding: 0 12px;
  font-size: var(--fs-nav); font-weight: 500;
  color: rgba(255, 255, 255, 0.92);
  transition: color .2s var(--ease);
}
/* 实色态：白底玻璃 + 深字 */
.nav.is-solid .nav__logo { color: var(--c-primary); }
.nav.is-solid .nav__link { color: var(--text-primary); }
.nav__link::after {
  content: ""; position: absolute; left: 12px; right: 12px; bottom: 8px;
  height: 2px; border-radius: 2px;
  background: var(--c-accent);
  transform: scaleX(0); transform-origin: left;
  transition: transform .2s var(--ease);
}
.nav__link:hover { color: #fff; }
.nav__link.is-active { color: var(--c-accent); }
.nav.is-solid .nav__link:hover { color: var(--c-primary); }
.nav.is-solid .nav__link.is-active { color: var(--c-primary-700); }
.nav__link.is-active::after { transform: scaleX(1); }

.nav__cta { margin-left: 8px; }

/* 汉堡按钮（默认隐藏，移动端显示） */
.nav__toggle {
  display: none;
  width: 44px; height: 44px;
  margin-left: auto;
  background: transparent; border: 0; cursor: pointer;
  padding: 10px;
}
.nav__toggle-bar {
  display: block; width: 22px; height: 2px; margin: 4px auto;
  background: #fff; border-radius: 2px;
  transition: transform .25s var(--ease), opacity .2s var(--ease), background .3s var(--ease);
}
.nav.is-solid .nav__toggle-bar { background: var(--text-primary); }
.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(2) { opacity: 0; }
.nav__toggle[aria-expanded="true"] .nav__toggle-bar:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* 移动端面板 */
.nav__mobile {
  background: #fff;
  border-top: 1px solid var(--border);
  box-shadow: var(--shadow-base);
}
.nav__mobile-list { padding: 8px var(--s-3) 16px; }
.nav__mobile-link {
  display: flex; align-items: center;
  min-height: 48px;
  font-size: 16px; font-weight: 500; color: var(--text-primary);
  border-bottom: 1px solid var(--border);
}
.nav__mobile-link:last-child { border-bottom: 0; }
.nav__mobile-link--cta { color: var(--c-primary); font-weight: 600; }

/* ---------- 5. 区块通用 ---------- */
.section { padding: var(--section-pad) 0; }
.section--subtle { background: var(--bg-subtle); }
.section--dark { background: var(--bg-dark); color: var(--text-onDark); }

.section__head { max-width: 720px; margin: 0 auto var(--s-8); text-align: center; }
.section__eyebrow {
  display: inline-block; margin-bottom: 12px;
  font-size: 19px; font-weight: 600; letter-spacing: 2px;
  color: var(--c-primary);
}
.section__eyebrow--onDark { color: var(--c-accent); }
.section__title { font-size: var(--fs-section); font-weight: 600; line-height: 1.3; }
.section__title--onDark { color: var(--text-onDark); }
.section__desc { margin-top: 12px; color: var(--text-secondary); font-size: 16px; }
.section__desc--onDark { color: var(--text-onDark-2); }

/* 栅格 */
.grid { display: grid; gap: var(--gutter); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

/* ---------- 6. Hero（Banner 轮播） ---------- */
.hero {
  position: relative;
  height: 86vh;
  min-height: 520px;
  max-height: 760px;
  overflow: hidden;
  color: var(--text-inverse);
  background: var(--bg-dark);
}
.hero__slides { position: absolute; inset: 0; }
.hero__slide {
  position: absolute; inset: 0;
  opacity: 0; visibility: hidden;
  transition: opacity .8s var(--ease);
}
.hero__slide.is-active { opacity: 1; visibility: visible; z-index: 1; }
.hero__img {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover; object-position: center;
}
/* 蒙层：左侧深蓝渐变保证文字可读 + 底部渐变消化右下角水印 */
.hero__mask {
  position: absolute; inset: 0;
  background:
    linear-gradient(90deg, rgba(10,27,51,0.80) 0%, rgba(10,27,51,0.45) 42%, rgba(10,27,51,0.05) 72%, transparent 88%),
    linear-gradient(0deg, rgba(10,27,51,0.92) 0%, rgba(10,27,51,0.55) 22%, transparent 46%);
}
.hero__inner {
  position: absolute; inset: 0; z-index: 2;
  display: flex; flex-direction: column; justify-content: center;
  text-align: left;
}
.hero__eyebrow {
  font-size: 15px; font-weight: 500; letter-spacing: 3px;
  color: var(--c-accent); margin-bottom: 20px;
}
.hero__title {
  font-size: var(--fs-hero); font-weight: 700; line-height: 1.15; letter-spacing: -0.5px;
  margin-bottom: 20px; max-width: 720px;
}
.hero__subtitle {
  max-width: 640px; margin: 0 0 36px;
  font-size: 18px; line-height: 1.7; color: var(--text-onDark-2);
}
.hero__actions { display: flex; gap: 16px; justify-content: flex-start; flex-wrap: wrap; }

/* 轮播箭头（玻璃态，hover/focus 显形） */
.hero__nav {
  position: absolute; top: 50%; transform: translateY(-50%);
  z-index: 3;
  width: 48px; height: 48px;
  display: inline-flex; align-items: center; justify-content: center;
  background: rgba(255, 255, 255, 0.14);
  -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 999px; color: #fff; cursor: pointer;
  opacity: 0; transition: opacity .3s var(--ease), background .2s var(--ease);
}
.hero:hover .hero__nav, .hero__nav:focus-visible { opacity: 1; }
.hero__nav:hover { background: rgba(255, 255, 255, 0.26); }
.hero__nav--prev { left: 24px; }
.hero__nav--next { right: 24px; }

/* 圆点指示器 */
.hero__dots {
  position: absolute; left: 50%; bottom: 26px; transform: translateX(-50%);
  z-index: 3; display: flex; gap: 12px;
}
.hero__dot {
  position: relative;
  width: 44px; height: 44px; padding: 0;
  border: 0; border-radius: 999px; cursor: pointer;
  background: transparent !important;
  font-size: 0; line-height: 0; color: transparent; text-indent: -9999px;
  overflow: hidden;
  transition: background .3s var(--ease);
}
.hero__dot::before {
  content: ""; position: absolute; left: 50%; top: 50%;
  transform: translate(-50%, -50%);
  width: 10px; height: 10px; border-radius: 999px;
  background: rgba(255, 255, 255, 0.45);
  transition: width .3s var(--ease), background .3s var(--ease);
}
.hero__dot:hover::before { background: rgba(255, 255, 255, 0.7); }
.hero__dot.is-active::before { width: 22px; background: var(--c-accent); }

/* ---------- 7. 关于我们 ---------- */
.about {
  display: block;
}
.about__panel {
  width: 100%;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--r-card);
  box-shadow: var(--shadow-base);
  padding: clamp(28px, 4vw, 56px) clamp(24px, 4vw, 64px);
  display: grid;
  gap: var(--s-5);
}
.about__head {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--s-6);
  align-items: end;
  padding-bottom: var(--s-4);
  border-bottom: 1px dashed var(--border);
}
.about__head .section__eyebrow {
  align-self: start;
}
.about__head .section__title {
  text-align: right;
  line-height: 1.25;
  margin: 0;
}
.about__body {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: clamp(20px, 3vw, 48px);
  align-items: start;
}
.about__lead {
  color: var(--text-secondary);
  line-height: 1.95;
  font-size: 16px;
  max-width: 56ch;
}
.about__points {
  display: grid;
  gap: 14px;
  font-size: 16px;
  color: var(--text-primary);
  font-weight: 500;
  line-height: 1.7;
}
.about__points li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}
.about__points li::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c-primary);
  flex: none;
  margin-top: 11px;
  box-shadow: 0 0 0 4px var(--c-primary-50);
}
.about__cta {
  display: flex;
  gap: var(--s-3);
  flex-wrap: wrap;
  padding-top: var(--s-2);
}

/* ---------- 8. 卡片（业务 / 案例） ---------- */
.card {
  position: relative;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--r-card);
  box-shadow: var(--shadow-base);
  padding: var(--s-4);
  transition: transform .2s var(--ease), box-shadow .2s var(--ease), border-color .2s var(--ease);
}
.card__accent {
  position: absolute; left: 0; top: 0; height: 3px; width: 100%;
  border-radius: var(--r-card) var(--r-card) 0 0;
  background: var(--c-primary);
  transform: scaleX(0); transform-origin: left;
  transition: transform .25s var(--ease);
}
.card__icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 52px; height: 52px; margin-bottom: 16px;
  border-radius: var(--r-card);
  background: var(--bg-muted); color: var(--text-primary);
  transition: background .2s var(--ease), color .2s var(--ease);
}
.card__title { font-size: var(--fs-subtitle); font-weight: 600; line-height: 1.4; margin-bottom: 10px; }
.card__text { font-size: 15px; color: var(--text-secondary); }

/* hover 微交互：抬升 + 阴影 + 图标变蓝 + 顶部蓝条 */
.card:hover, .card:focus-within {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--c-primary);
}
.card:hover .card__accent, .card:focus-within .card__accent { transform: scaleX(1); }
.card:hover .card__icon, .card:focus-within .card__icon {
  background: var(--c-primary-50); color: var(--c-primary);
}

/* ---------- 9. 解决方案（特性卡矩阵 · 8 大产品） ---------- */
.section--solutions { position: relative; overflow: hidden; }
/* 微弱双色光晕，给"提效 / 合规"两大组做一个空间感背景 */
.section--solutions::before {
  content: "";
  position: absolute; inset: 0;
  background:
    radial-gradient(50% 60% at 10% 0%,  rgba(31,95,255,.10), transparent 60%),
    radial-gradient(45% 55% at 92% 100%, rgba(26,79,204,.07), transparent 60%);
  pointer-events: none;
}
.section--solutions .container { position: relative; z-index: 1; }

.sol-grid { gap: 24px; }

.sol {
  --c-brand: #1F5FFF;
  --c-tint: rgba(31,95,255,.10);
  position: relative;
  display: flex; flex-direction: column;
  background: linear-gradient(180deg, var(--c-tint) 0%, transparent 40%), #fff;
  border: 1px solid var(--border);
  border-radius: var(--r-card);
  padding: 26px 24px 22px;
  isolation: isolate;
  overflow: hidden;
  box-shadow: var(--shadow-base);
  transition:
    transform .35s var(--ease),
    box-shadow .35s var(--ease),
    border-color .35s var(--ease),
    background .35s var(--ease);
}
.sol::after {
  /* hover 时背景染色层 */
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(180deg, var(--c-tint) 0%, transparent 60%);
  opacity: 0;
  transition: opacity .35s var(--ease);
  z-index: -1;
  border-radius: inherit;
}
.sol:hover {
  transform: translateY(-6px);
  border-color: var(--c-brand);
  box-shadow:
    0 24px 48px -16px var(--c-tint),
    0 2px 4px rgba(16,24,40,.06),
    0 16px 40px rgba(16,24,40,.12);
}
.sol:hover::after { opacity: 1; }

.sol__stripe {
  position: absolute; top: 0; left: 0; right: 0; height: 4px;
  background: linear-gradient(90deg, var(--c-brand) 0%, color-mix(in srgb, var(--c-brand) 55%, white) 100%);
}

.sol__head {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 18px;
}

.sol__icon {
  flex: none;
  width: 56px; height: 56px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 12px;
  color: var(--c-brand);
  background: var(--c-tint);
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--c-brand) 22%, transparent);
  transition: transform .35s var(--ease);
}
.sol:hover .sol__icon { transform: scale(1.06) rotate(-4deg); }

.sol__tag {
  display: inline-flex; align-items: center;
  font-size: 12px; font-weight: 600; letter-spacing: .4px;
  padding: 5px 11px;
  border-radius: 999px;
  color: var(--c-brand);
  background: var(--c-tint);
  border: 1px solid color-mix(in srgb, var(--c-brand) 22%, transparent);
  white-space: nowrap;
}

.sol__title {
  font-size: 18px; font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
  letter-spacing: .2px;
}
.sol__sub {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 18px;
}

.sol__feats {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
  display: flex; flex-direction: column;
  gap: 9px;
  font-size: 14px;
  color: var(--text-primary);
  line-height: 1.5;
}
.sol__feats li {
  display: flex; align-items: flex-start; gap: 9px;
}
.sol__check {
  flex: none;
  width: 16px; height: 16px;
  margin-top: 4px;
  border-radius: 50%;
  background: var(--c-tint);
  position: relative;
}
.sol__check::after {
  content: "";
  position: absolute;
  top: 4px; left: 4px;
  width: 7px; height: 3.5px;
  border-left: 2px solid var(--c-brand);
  border-bottom: 2px solid var(--c-brand);
  transform: rotate(-45deg);
  border-radius: 1px;
}

.sol__stat {
  margin-top: auto;
  display: flex; align-items: baseline; gap: 10px;
  padding-top: 14px;
  border-top: 1px dashed color-mix(in srgb, var(--c-brand) 30%, var(--border));
}
.sol__stat strong {
  font-size: 26px; font-weight: 800;
  line-height: 1;
  color: var(--c-brand);
  letter-spacing: -.5px;
}
.sol__stat span {
  font-size: 12px;
  color: var(--text-secondary);
}

.sol__deco {
  position: absolute;
  top: 18px; right: 22px;
  width: 56px; height: 56px;
  opacity: .12;
  fill: var(--c-brand);
  pointer-events: none;
}

/* ---------- 10. 服务能力（深色） ---------- */
.cap { margin-bottom: var(--s-8); }
.cap__item {
  --c: var(--c-primary);
  position: relative;
  display: flex; flex-direction: column; gap: 12px;
  padding: 26px 24px 24px;
  background: var(--bg-dark-elevated);
  border: 1px solid var(--border-onDark);
  border-top: 3px solid var(--c);
  border-radius: var(--r-card);
  transition: transform .25s var(--ease), border-color .25s var(--ease), box-shadow .25s var(--ease);
  overflow: hidden;
}
/* 右上角品牌色柔和光晕，与 solutions 卡片呼应 */
.cap__item::after {
  content: ""; position: absolute; top: -50px; right: -50px;
  width: 130px; height: 130px;
  border-radius: 50%;
  background: radial-gradient(circle, color-mix(in srgb, var(--c) 22%, transparent) 0%, transparent 70%);
  pointer-events: none;
}
.cap__item:hover {
  transform: translateY(-4px);
  border-color: color-mix(in srgb, var(--c) 50%, var(--border-onDark));
  box-shadow: 0 16px 32px -16px color-mix(in srgb, var(--c) 35%, transparent);
}
.cap__icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 44px; height: 44px;
  border-radius: 12px;
  color: var(--c);
  background: color-mix(in srgb, var(--c) 16%, transparent);
  border: 1px solid color-mix(in srgb, var(--c) 30%, transparent);
  flex: none;
  position: relative; z-index: 1;
}
.cap__title {
  font-size: 18px; font-weight: 700;
  color: var(--text-onDark);
  letter-spacing: .2px;
  line-height: 1.4;
  position: relative; z-index: 1;
}
.cap__sub {
  font-size: 13.5px;
  color: color-mix(in srgb, var(--c) 70%, #fff);
  margin: -4px 0 4px;
  font-weight: 500;
  position: relative; z-index: 1;
}
.cap__feats {
  display: flex; flex-direction: column; gap: 8px;
  padding-top: 12px;
  border-top: 1px dashed var(--border-onDark);
  position: relative; z-index: 1;
}
.cap__feats li {
  position: relative; padding-left: 18px;
  font-size: 13.5px;
  color: var(--text-onDark-2);
  line-height: 1.55;
}
.cap__feats li::before {
  content: ""; position: absolute; left: 0; top: 8px;
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--c);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--c) 20%, transparent);
}

.tech__certs {
  display: flex; flex-wrap: wrap; gap: 12px; justify-content: center;
  margin-bottom: var(--s-8);
}
.tech__certs .tag {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--bg-dark-glass);
  color: var(--text-onDark);
  border: 1px solid var(--border-onDark);
  font-weight: 500;
  padding: 8px 18px;
  font-size: 14px;
  border-radius: 999px;
  position: relative;
  transition: border-color .2s var(--ease), background .2s var(--ease), color .2s var(--ease), transform .2s var(--ease);
}
/* 徽章左侧的"盾牌"小标记，强调"授权"语义 */
.tech__certs .tag::before {
  content: "";
  display: inline-block;
  width: 14px; height: 14px;
  flex: none;
  background:
    linear-gradient(135deg, var(--c-accent) 0%, color-mix(in srgb, var(--c-accent) 65%, transparent) 100%);
  -webkit-mask: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linejoin='round'><path d='M12 3l7 3v5c0 4.4-3 8.2-7 10-4-1.8-7-5.6-7-10V6l7-3z'/><path d='M9.5 12l1.8 1.8 3.4-3.6'/></svg>") center/contain no-repeat;
          mask: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linejoin='round'><path d='M12 3l7 3v5c0 4.4-3 8.2-7 10-4-1.8-7-5.6-7-10V6l7-3z'/><path d='M9.5 12l1.8 1.8 3.4-3.6'/></svg>") center/contain no-repeat;
}
.tech__certs .tag:hover {
  border-color: var(--c-accent);
  background: color-mix(in srgb, var(--c-accent) 10%, transparent);
  color: #fff;
  transform: translateY(-2px);
}

.stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--gutter);
  margin: 0; text-align: center;
}
.stat__num {
  font-family: "Inter", var(--font);
  font-size: var(--fs-stat); font-weight: 700; line-height: 1.1;
  color: var(--c-accent);
  font-variant-numeric: tabular-nums;
}
.stat__label { margin-top: 8px; font-size: var(--fs-caption); color: var(--text-onDark-2); }
.tech__note { margin-top: 24px; text-align: center; font-size: var(--fs-caption); color: var(--text-onDark-muted); }

/* ---------- 11. 客户案例 / 合作伙伴 ---------- */
.case { overflow: hidden; }
.case__cover {
  position: relative;
  margin: calc(-1 * var(--s-4)) calc(-1 * var(--s-4)) var(--s-4);
  aspect-ratio: 16 / 9;
  border-radius: var(--r-card) var(--r-card) 0 0;
  overflow: hidden;
  background: var(--bg-muted);
}
.case__cover--img img {
  display: block; width: 100%; height: 100%;
  object-fit: cover; object-position: center;
  transition: transform .5s var(--ease);
}
.case:hover .case__cover--img img { transform: scale(1.06); }
.case__cover::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(0,0,0,.05) 0%, rgba(0,0,0,.35) 100%);
  pointer-events: none;
}
.case__cover-tag {
  position: absolute; left: 16px; top: 16px;
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 12px 6px 10px;
  background: rgba(255, 255, 255, 0.95);
  color: var(--c-primary-700);
  font-size: 13px; font-weight: 600;
  border-radius: 999px;
  letter-spacing: .5px;
  backdrop-filter: blur(8px);
  box-shadow: 0 2px 8px rgba(0,0,0,.12);
  z-index: 1;
}
.case__tag-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--c, var(--c-primary));
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--c, var(--c-primary)) 25%, transparent);
  flex: none;
}
.case__body { padding: 4px 4px 8px; }
.case__title { font-size: 18px; font-weight: 700; line-height: 1.5; margin-bottom: 14px; color: var(--text-primary); }

/* 数据亮点：作为视觉锚点 */
.case__stat {
  display: flex; align-items: baseline; gap: 10px;
  padding: 10px 14px;
  margin-bottom: 14px;
  background: linear-gradient(135deg, var(--c-primary-50) 0%, rgba(31,95,255,.04) 100%);
  border-left: 3px solid var(--c-primary);
  border-radius: 6px;
}
.case__stat strong {
  font-family: "Inter", var(--font);
  font-size: 28px; font-weight: 800; line-height: 1;
  color: var(--c-primary);
  letter-spacing: -.5px;
  font-variant-numeric: tabular-nums;
}
.case__stat-unit { font-size: 18px; margin-left: 1px; }
.case__stat span {
  font-size: 13.5px;
  color: var(--text-secondary);
  line-height: 1.4;
}

.case__effect { font-size: 14.5px; color: var(--text-secondary); line-height: 1.75; margin-bottom: 14px; }
.case__bullets { display: grid; gap: 10px; padding-top: 14px; border-top: 1px dashed var(--border); }
.case__bullets li {
  position: relative; padding-left: 26px;
  font-size: 13.5px; color: var(--text-secondary);
  line-height: 1.65;
}
.case__bullet-ico {
  position: absolute; left: 0; top: 1px;
  width: 20px; height: 20px;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 11px; font-weight: 700;
  color: var(--c-primary);
  background: var(--c-primary-50);
  border-radius: 999px;
  font-family: "Inter", var(--font);
}

.partners { margin-top: var(--s-8); text-align: center; }
.partners__head { margin-bottom: var(--s-4); }
.partners__title { font-size: var(--fs-subtitle); font-weight: 600; color: var(--text-primary); margin-bottom: 8px; }
.partners__sub { font-size: 14px; color: var(--text-secondary); max-width: 560px; margin: 0 auto; }

.partners__wall {
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--gutter);
  max-width: 920px; margin: 0 auto;
}
.partner {
  --p-brand: var(--c-primary);
  position: relative;
  display: flex; flex-direction: column; align-items: center; justify-content: flex-start; gap: 16px;
  min-height: 168px; padding: 28px 22px 22px;
  background: #fff;
  border: 1px solid var(--border);
  border-top: 3px solid var(--p-brand);
  border-radius: var(--r-card);
  text-align: center;
  overflow: hidden;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), border-color .25s var(--ease);
}
/* 背景：右上角品牌色柔和光晕 */
.partner::before {
  content: "";
  position: absolute; top: -40px; right: -40px;
  width: 120px; height: 120px;
  border-radius: 50%;
  background: radial-gradient(circle, color-mix(in srgb, var(--p-brand) 18%, transparent) 0%, transparent 70%);
  pointer-events: none;
  transition: transform .4s var(--ease);
}
.partner:hover::before { transform: scale(1.15); }
.partner__top {
  display: inline-flex; align-items: center; justify-content: center;
  width: 56px; height: 56px;
  border-radius: 14px;
  background: color-mix(in srgb, var(--p-brand) 12%, #fff);
  color: var(--p-brand);
  position: relative; z-index: 1;
  transition: transform .25s var(--ease), background .25s var(--ease);
}
.partner__svg { display: block; }
.partner__text {
  display: flex; flex-direction: column; align-items: center; gap: 6px;
  position: relative; z-index: 1;
}
.partner__name { font-size: 20px; font-weight: 700; letter-spacing: .5px; color: var(--text-primary); }
.partner__tag {
  display: inline-flex; align-items: center;
  font-size: 11px; font-weight: 600; letter-spacing: .5px;
  padding: 3px 9px;
  color: var(--p-brand);
  background: color-mix(in srgb, var(--p-brand) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--p-brand) 30%, transparent);
  border-radius: 999px;
}
.partner__desc { font-size: 13.5px; color: var(--text-tertiary); line-height: 1.5; }

.partner:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 32px -12px color-mix(in srgb, var(--p-brand) 35%, transparent);
  border-color: color-mix(in srgb, var(--p-brand) 35%, var(--border));
}
.partner:hover .partner__top {
  transform: scale(1.08) rotate(-4deg);
  background: var(--p-brand);
  color: #fff;
}
.partners__note { margin-top: 20px; font-size: 13.5px; color: var(--text-tertiary); }

/* ---------- 12. 新闻动态 ---------- */
.news { display: grid; gap: 16px; }
.news__item {
  background: #fff; border: 1px solid var(--border); border-radius: var(--r-card);
  box-shadow: var(--shadow-base);
  transition: transform .2s var(--ease), box-shadow .2s var(--ease), border-color .2s var(--ease);
}
.news__item:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); border-color: var(--c-primary); }
.news__link { display: block; padding: var(--s-3) var(--s-4); }
.news__date { display: inline-block; font-size: var(--fs-caption); color: var(--text-tertiary); margin-bottom: 6px; font-variant-numeric: tabular-nums; }
.news__title { font-size: var(--fs-subtitle); font-weight: 600; position: relative; width: fit-content; }
/* 链接 hover 下划线由左向右展开 */
.news__title::after {
  content: ""; position: absolute; left: 0; bottom: -2px; height: 2px; width: 100%;
  background: var(--c-primary); transform: scaleX(0); transform-origin: left;
  transition: transform .2s var(--ease);
}
.news__link:hover .news__title::after { transform: scaleX(1); }
.news__summary { margin-top: 8px; font-size: 15px; color: var(--text-secondary); }

/* ---------- 13. 联系方式 / 页脚 ---------- */
.contact__grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--s-8); align-items: start; }
.contact__list { display: grid; gap: var(--s-3); margin-bottom: var(--s-4); }
.contact__row { display: flex; align-items: flex-start; gap: 14px; font-size: 16px; color: var(--text-onDark-2); }
.contact__ico { flex: none; width: 40px; height: 40px; display: inline-flex; align-items: center; justify-content: center; border-radius: var(--r-card); background: var(--bg-dark-elevated); color: var(--c-accent); }
.contact__k { display: block; font-size: var(--fs-caption); color: var(--text-onDark-muted); }
.contact__v { color: var(--text-onDark); }
a.contact__v:hover { text-decoration: underline; }

.contact__map {
  position: relative;
  border-radius: var(--r-card);
  overflow: hidden;
  border: 1px solid var(--border-onDark);
  line-height: 0;
}
.contact__map img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--r-card);
}

/* 表单 */
.contact__form {
  background: #fff; border-radius: var(--r-card);
  box-shadow: var(--shadow-hover);
  padding: var(--s-4);
}
.field { margin-bottom: var(--s-3); }
.field label { display: block; font-size: var(--fs-caption); font-weight: 500; color: var(--text-primary); margin-bottom: 8px; }
.field__req { color: var(--c-danger); }
.field input, .field textarea {
  width: 100%; font-family: inherit; font-size: 16px; color: var(--text-primary);
  background: var(--bg-muted);
  border: 1px solid var(--border); border-radius: var(--r-input);
  padding: 12px 14px; min-height: 44px;
  transition: border-color .2s var(--ease), box-shadow .2s var(--ease), background .2s var(--ease);
}
.field textarea { resize: vertical; }
.field input::placeholder, .field textarea::placeholder { color: var(--text-tertiary); }
.field input:focus, .field textarea:focus { background: #fff; border-color: var(--c-primary); outline: none; box-shadow: 0 0 0 3px rgba(31, 95, 255, 0.15); }
.field.is-invalid input, .field.is-invalid textarea { border-color: var(--c-danger); }
.field__err { min-height: 18px; margin-top: 6px; font-size: 13px; color: var(--c-danger); }
.form__ok { margin-top: 14px; font-size: 14px; color: var(--c-success); text-align: center; }
.form__err-tip { margin-top: 14px; font-size: 14px; color: var(--c-danger); text-align: center; }

.footer { margin-top: 0; background: var(--bg-dark); border-top: 1px solid var(--border-onDark); }
.footer__inner {
  padding: var(--s-4) var(--s-3);
  display: flex; flex-wrap: wrap; gap: 12px; justify-content: space-between; align-items: center;
  font-size: var(--fs-caption); color: var(--text-onDark-muted);
}
.footer__brand p { color: var(--text-onDark-2); }
.footer__brand p:first-child { font-size: 18px; font-weight: 600; color: #fff; margin-bottom: 4px; letter-spacing: .5px; }
.footer__sub { font-size: 13.5px !important; color: var(--text-onDark-muted) !important; }
.footer__meta { display: flex; flex-direction: column; align-items: flex-end; gap: 4px; font-size: var(--fs-caption); color: var(--text-onDark-2); }
.footer__icp { font-size: 12px; color: var(--text-onDark-muted); letter-spacing: .3px; }
.footer__legal { display: inline-flex; align-items: center; gap: 12px; }
.footer__legal a { color: var(--text-onDark-2); text-decoration: none; transition: color .2s; }
.footer__legal a:hover { color: var(--c-accent); }
.footer__legal a.footer__icp { color: var(--text-onDark-muted); }

/* 表单：同意隐私政策勾选 */
.field--consent { margin-bottom: 14px; }
.field--consent .consent { display: inline-flex; align-items: flex-start; gap: 8px; font-size: 13px; line-height: 1.5; color: var(--text-secondary, #5C6675); cursor: pointer; }
.field--consent .consent input { margin-top: 2px; width: 16px; height: 16px; flex: none; accent-color: var(--c-primary); padding: 0; min-height: 0; border: 1px solid var(--border); border-radius: 4px; background: #fff; }
.field--consent .consent a { color: var(--c-primary); text-decoration: none; }
.field--consent .consent a:hover { text-decoration: underline; }
@media (max-width: 639px) {
  .footer__meta { align-items: flex-start; }
}

/* ---------- 14. 滚动揭示动效 ---------- */
/* L3 无 JS 兜底：默认可见（禁用 JS 时仍可阅读全部内容）；仅当 <html> 带 .js 类时才初始隐藏，由 JS 揭示 */
.reveal { opacity: 1; transform: none; }
.js .reveal {
  opacity: 0; transform: translateY(24px);
  transition: opacity .6s var(--ease), transform .6s var(--ease);
}
.reveal.in-view { opacity: 1; transform: translateY(0); }

/* 错落 stagger（按元素顺序延迟） */
.grid .reveal:nth-child(2) { transition-delay: .08s; }
.grid .reveal:nth-child(3) { transition-delay: .16s; }
.grid .reveal:nth-child(4) { transition-delay: .24s; }
.stats .reveal:nth-child(2) { transition-delay: .1s; }
.stats .reveal:nth-child(3) { transition-delay: .2s; }
.stats .reveal:nth-child(4) { transition-delay: .3s; }

/* ---------- 15. 响应式断点 ---------- */

/* 桌面大屏 ≥1280：内容锁 1200 居中（已由 .container 保证） */

/* 平板 640–1023：2 列 */
@media (max-width: 1023px) {
  :root { --section-pad: 72px; }
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
  .about { grid-template-columns: 1fr; gap: var(--s-6); }
  .contact__grid { grid-template-columns: 1fr; gap: var(--s-6); }
  .partners__wall { grid-template-columns: repeat(3, 1fr); }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .sol-grid { gap: 20px; }
  .sol__icon { width: 50px; height: 50px; }
  .nav__logo-text { font-size: 15.5px; }
  .nav__logo-mark svg { width: 24px; height: 24px; }
  .sol__title { font-size: 17px; }
}

/* 中危 M1 修复：导航折叠断点由 <640 上调至 ≤860px，
   保证 iPad 竖屏(768/810/820)等平板宽度下导航不溢出、切换为汉堡菜单 */
@media (max-width: 860px) {
  .nav__menu, .nav__cta { display: none; }
  .nav__toggle { display: block; }
}

/* 移动 <640：单列 + 汉堡 */
@media (max-width: 639px) {
  :root { --section-pad: 56px; --gutter: 16px; }
  :root { --fs-hero: 36px; --fs-section: 26px; --fs-subtitle: 18px; --fs-stat: 34px; }

  .hero { height: 78vh; min-height: 460px; max-height: none; }
  .hero__title { font-size: var(--fs-hero); }
  .hero__subtitle { font-size: 16px; margin-bottom: 28px; }
  .hero__actions { flex-direction: column; align-items: stretch; }
  .hero__actions .btn { width: 100%; }
  .hero__nav { display: none; } /* 移动端以滑动 + 圆点导航；箭头常显会盖住副标题首行 */
  .hero__dots { bottom: 18px; }

  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
  .about__panel { padding: var(--s-5); }
  .about__head { grid-template-columns: 1fr; gap: var(--s-3); padding-bottom: var(--s-3); }
  .about__head .section__title { text-align: left; }
  .about__body { grid-template-columns: 1fr; gap: var(--s-4); }
  .partners__wall { grid-template-columns: 1fr; max-width: 360px; }
  .stats { grid-template-columns: repeat(2, 1fr); gap: var(--s-4); }

  .section__head { margin-bottom: var(--s-6); }
  .footer__inner { flex-direction: column; align-items: flex-start; }

  /* 解决方案卡：移动端去掉角落装饰、压缩内边距、stat 更紧凑 */
  .sol-grid { gap: 16px; }
  .sol { padding: 22px 20px 18px; }
  .sol__deco { display: none; }
  .sol__stat strong { font-size: 22px; }
}

/* ---------- 16. 降级：尊重 prefers-reduced-motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .reveal { opacity: 1 !important; transform: none !important; }
  .hero__blob { animation: none !important; }
}