/* ==========================================================================
   组件层 — 数智为新官网
   ========================================================================== */

/* ---------------------------------------------------------------- 页头 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, .94);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--c-border);
}
/* 顶部一条极细的品牌渐变线，让页头不再是纯白平板 */
.site-header::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: var(--grad-line);
  opacity: .9;
}
/* 滚动后才出现的投影（JS 加 .is-scrolled），静态时保持干净 */
.site-header.is-scrolled {
  box-shadow: 0 1px 0 rgba(22, 36, 58, .04), 0 6px 20px rgba(22, 36, 58, .06);
}
.site-header__inner {
  height: var(--header-h);
  display: flex;
  align-items: center;
  gap: var(--sp-6);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  color: var(--c-text-1);
  font-weight: 700;
  font-size: var(--fs-md);
  letter-spacing: -.01em;
  white-space: nowrap;
}
.brand:hover { color: var(--c-brand-600); text-decoration: none; }
.brand__mark {
  flex: none; width: 32px; height: 32px;
  border-radius: 9px;
  box-shadow: 0 2px 8px rgba(26, 102, 168, .28);
  transition: transform var(--dur-slow) var(--ease-out), box-shadow var(--dur) var(--ease);
}
.brand:hover .brand__mark {
  transform: translateY(-1px) rotate(-4deg);
  box-shadow: 0 5px 14px rgba(26, 102, 168, .34);
}
.brand__sub {
  display: block;
  font-size: var(--fs-xs);
  font-weight: 400;
  color: var(--c-text-3);
  letter-spacing: .02em;
  line-height: 1.2;
}

.nav { margin-left: auto; }
.nav__list {
  display: flex;
  align-items: center;
  gap: var(--sp-1);
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav__item { margin: 0; position: relative; }
.nav__link {
  position: relative;
  display: block;
  padding: var(--sp-2) var(--sp-4);
  border-radius: var(--radius-md);
  color: var(--c-text-2);
  font-size: var(--fs-sm);
  font-weight: 500;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.nav__link:hover { background: var(--c-brand-050); color: var(--c-brand-600); text-decoration: none; }
.nav__link[aria-current="page"],
.nav__link.is-active { color: var(--c-brand-600); background: var(--c-brand-050); }
/* 当前栏目的下方短渐变条，比纯色块更精致 */
.nav__link.is-active::after {
  content: "";
  position: absolute;
  left: var(--sp-4);
  right: var(--sp-4);
  bottom: 2px;
  height: 2px;
  border-radius: 2px;
  background: var(--grad-line);
}

/* 二级菜单 */
.nav__sub {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  min-width: 220px;
  padding: var(--sp-2);
  margin: 0;
  list-style: none;
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-3);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease), visibility var(--dur);
}
.nav__item:hover > .nav__sub,
.nav__item:focus-within > .nav__sub {
  opacity: 1; visibility: visible; transform: translateY(0);
}
.nav__sub li { margin: 0; }
.nav__sub a {
  display: block;
  padding: var(--sp-2) var(--sp-3);
  border-radius: var(--radius-sm);
  color: var(--c-text-2);
  font-size: var(--fs-sm);
}
.nav__sub a:hover { background: var(--c-brand-050); color: var(--c-brand-600); text-decoration: none; }

.header-cta { margin-left: var(--sp-4); }

.nav-toggle {
  display: none;
  margin-left: auto;
  width: 42px; height: 42px;
  align-items: center; justify-content: center;
  background: transparent;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  color: var(--c-text-1);
}
.nav-toggle:hover { background: var(--c-bg-subtle); }

@media (max-width: 1080px) {
  .header-cta { display: none; }
}
@media (max-width: 900px) {
  .nav-toggle { display: flex; }
  .nav {
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
    margin: 0;
    padding: var(--sp-4);
    background: #fff;
    border-bottom: 1px solid var(--c-border);
    box-shadow: var(--shadow-3);
    display: none;
  }
  .nav.is-open { display: block; }
  .nav__list { flex-direction: column; align-items: stretch; gap: 0; }
  .nav__link { padding: var(--sp-4); font-size: var(--fs-base); border-radius: var(--radius-sm); }
  .nav__sub {
    position: static; opacity: 1; visibility: visible; transform: none;
    box-shadow: none; border: 0; border-left: 2px solid var(--c-brand-100);
    border-radius: 0; margin-left: var(--sp-4); padding: 0 0 0 var(--sp-2);
  }
}

/* ---------------------------------------------------------------- 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  padding: var(--sp-3) var(--sp-6);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: var(--fs-sm);
  font-weight: 600;
  line-height: 1.5;
  text-align: center;
  cursor: pointer;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease),
              color var(--dur) var(--ease), box-shadow var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.btn:hover { text-decoration: none; }
.btn:active { transform: translateY(1px); }

.btn--primary { background: var(--c-brand-500); color: #fff; box-shadow: var(--shadow-1); }
.btn--primary:hover { background: var(--c-brand-600); color: #fff; box-shadow: var(--shadow-2); }

.btn--accent { background: var(--c-accent-500); color: #fff; }
.btn--accent:hover { background: var(--c-accent-600); color: #fff; }

.btn--outline { background: #fff; border-color: var(--c-border-strong); color: var(--c-text-1); }
.btn--outline:hover { border-color: var(--c-brand-400); color: var(--c-brand-600); background: var(--c-brand-050); }

.btn--ghost-light { background: rgba(255,255,255,.12); border-color: rgba(255,255,255,.5); color: #fff; }
.btn--ghost-light:hover { background: rgba(255,255,255,.22); color: #fff; }

.btn--lg { padding: var(--sp-4) var(--sp-8); font-size: var(--fs-base); }
.btn--sm { padding: var(--sp-2) var(--sp-4); font-size: var(--fs-xs); }
.btn--block { width: 100%; }

/* 文字箭头链接 */
.link-arrow {
  display: inline-flex; align-items: center; gap: var(--sp-2);
  font-size: var(--fs-sm); font-weight: 600;
}
.link-arrow::after {
  content: "→"; transition: transform var(--dur) var(--ease);
}
.link-arrow:hover::after { transform: translateX(3px); }

/* ---------------------------------------------------------------- 首屏 */
.hero {
  position: relative;
  isolation: isolate;
  background: var(--c-brand-900);
  color: var(--c-text-inverse);
  overflow: hidden;
}
.hero__bg {
  position: absolute; inset: 0;
  z-index: -3;
  object-fit: cover;
  width: 100%; height: 100%;
  opacity: .32;
}
/* 多层叠加：径向光晕 + 点阵底纹 + 主渐变，摆脱"一块纯色"的单调 */
.hero::before {
  content: "";
  position: absolute; inset: 0; z-index: -2;
  background-image: var(--dots-light);
  background-size: 26px 26px;
  opacity: .5;
  mask-image: linear-gradient(180deg, rgba(0,0,0,.75) 0%, rgba(0,0,0,.18) 62%, transparent 100%);
  -webkit-mask-image: linear-gradient(180deg, rgba(0,0,0,.75) 0%, rgba(0,0,0,.18) 62%, transparent 100%);
}
.hero::after {
  content: "";
  position: absolute; inset: 0; z-index: -1;
  background:
    radial-gradient(75% 60% at 8% 4%, rgba(46, 134, 200, .48) 0%, rgba(6, 33, 63, 0) 62%),
    radial-gradient(55% 55% at 88% 92%, rgba(31, 169, 204, .26) 0%, rgba(6, 33, 63, 0) 68%),
    linear-gradient(178deg, rgba(6,33,63,.72) 0%, rgba(6,33,63,.86) 55%, rgba(6,33,63,.94) 100%);
}
.hero__inner { position: relative; padding-block: var(--sp-12) var(--sp-9); }

/* 左文右数字的不对称两栏，取代"一条道居中往下堆" */
.hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--sp-10);
  align-items: end;
}
@media (max-width: 1080px) {
  .hero__grid { grid-template-columns: minmax(0, 1fr); gap: var(--sp-8); align-items: start; }
}
.hero__copy { max-width: 46ch; }
.hero__eyebrow {
  display: inline-flex; align-items: center; gap: var(--sp-2);
  padding: var(--sp-1) var(--sp-4);
  margin-bottom: var(--sp-6);
  border: 1px solid rgba(255,255,255,.28);
  border-radius: var(--radius-pill);
  background: rgba(255,255,255,.08);
  font-size: var(--fs-xs);
  letter-spacing: .04em;
  color: #E4EEFA;
}
/* 眉标前的小圆点，带呼吸感 */
.hero__eyebrow::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--c-accent-400);
  box-shadow: 0 0 0 3px rgba(31, 169, 204, .22);
}
.hero h1 {
  color: #fff;
  font-size: var(--fs-4xl);
  max-width: 20ch;
  margin-bottom: var(--sp-5);
  letter-spacing: -.02em;
}
/* 第二行用渐变字提升质感，但保持可读（不用纯透明裁剪，避免低对比） */
.hero h1 em {
  font-style: normal;
  background: linear-gradient(96deg, #FFFFFF 12%, #9FD8EE 92%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  /* 兜底：不支持 background-clip:text 时仍是白色 */
  -webkit-text-fill-color: transparent;
}
.hero__lead {
  max-width: 62ch;
  font-size: var(--fs-md);
  color: #D3E1F1;
  margin-bottom: var(--sp-5);
}
.hero__lead:last-of-type { margin-bottom: var(--sp-8); }
.hero__actions { display: flex; flex-wrap: wrap; gap: var(--sp-4); margin-bottom: var(--sp-10); }
/* 主按钮加一层柔光，在深底上更"发亮" */
.hero__actions .btn--accent {
  box-shadow: 0 8px 24px rgba(18, 147, 180, .38);
}
.hero__actions .btn--accent:hover {
  box-shadow: 0 12px 30px rgba(18, 147, 180, .48);
}

/* 首屏关键指标：改为右侧竖排，形成不对称重心 */
.hero__stats {
  display: grid;
  gap: var(--sp-6);
  margin: 0;
  min-width: 260px;
  padding-left: var(--sp-8);
  border-left: 1px solid rgba(255,255,255,.16);
}
.hero__stat {
  position: relative;
  padding-left: var(--sp-5);
}
/* 每个指标左侧一条竖向渐变刻度 */
.hero__stat::before {
  content: "";
  position: absolute;
  left: 0; top: 2px; bottom: 2px;
  width: 2px;
  border-radius: 2px;
  background: var(--grad-line);
  opacity: .85;
}
.hero__stat dd {
  margin: 0;
  font-size: clamp(30px, 3.4vw, 44px);
  font-weight: 800;
  color: #fff;
  line-height: 1.05;
  letter-spacing: -.02em;
  font-variant-numeric: tabular-nums;
}
.hero__stat dd small { font-size: var(--fs-md); font-weight: 600; margin-left: 2px; color: #BBD3EA; }
.hero__stat dt {
  font-size: var(--fs-xs);
  color: #AEC2DA;
  letter-spacing: .03em;
  margin-top: var(--sp-2);
  line-height: 1.5;
}

/* 首屏底部关键词横条：横向滚动的一条能力带 */
.hero__ticker {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2) var(--sp-3);
  margin: var(--sp-10) 0 0;
  padding: var(--sp-5) 0 0;
  list-style: none;
  border-top: 1px solid rgba(255,255,255,.14);
}
.hero__ticker li {
  margin: 0;
  padding: 3px var(--sp-4);
  border: 1px solid rgba(255,255,255,.16);
  border-radius: var(--radius-pill);
  font-size: var(--fs-xs);
  color: #BBD3EA;
  letter-spacing: .02em;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease),
              background var(--dur) var(--ease);
}
.hero__ticker li:hover {
  border-color: rgba(31,169,204,.6);
  background: rgba(31,169,204,.12);
  color: #fff;
}

@media (max-width: 680px) {
  .hero__stats { min-width: 0; padding-left: 0; border-left: 0; padding-top: var(--sp-5); border-top: 1px solid rgba(255,255,255,.16); }
}

/* 内页页头 */
.page-hero {
  position: relative;
  isolation: isolate;
  background: var(--c-brand-800);
  color: #fff;
  overflow: hidden;
}
.page-hero__bg {
  position: absolute; inset: 0; z-index: -3;
  width: 100%; height: 100%; object-fit: cover; opacity: .24;
}
/* 与首屏同一套底纹语言，保持全站一致 */
.page-hero::before {
  content: "";
  position: absolute; inset: 0; z-index: -2;
  background-image: var(--dots-light);
  background-size: 24px 24px;
  opacity: .42;
  mask-image: linear-gradient(100deg, rgba(0,0,0,.85) 0%, transparent 78%);
  -webkit-mask-image: linear-gradient(100deg, rgba(0,0,0,.85) 0%, transparent 78%);
}
.page-hero::after {
  content: "";
  position: absolute; inset: 0; z-index: -1;
  background:
    radial-gradient(70% 80% at 92% 10%, rgba(31, 169, 204, .22) 0%, rgba(6,33,63,0) 66%),
    linear-gradient(100deg, rgba(6,33,63,.94) 0%, rgba(16,63,110,.82) 100%);
}
.page-hero__inner { padding-block: var(--sp-10) var(--sp-9); }
.page-hero h1 { color: #fff; margin-bottom: var(--sp-4); }
.page-hero__lead { max-width: 68ch; font-size: var(--fs-md); color: #D3E1F1; margin: 0; }

/* ---------------------------------------------------------------- 面包屑 */
.breadcrumb {
  padding-block: var(--sp-4);
  border-bottom: 1px solid var(--c-border);
  background: var(--c-bg-subtle);
}
.breadcrumb__list {
  display: flex; flex-wrap: wrap; align-items: center;
  gap: var(--sp-2);
  margin: 0; padding: 0;
  list-style: none;
  font-size: var(--fs-xs);
  color: var(--c-text-3);
}
.breadcrumb__list li { margin: 0; display: flex; align-items: center; gap: var(--sp-2); }
.breadcrumb__list li + li::before { content: "/"; color: var(--c-border-strong); }
.breadcrumb__list a { color: var(--c-text-3); }
.breadcrumb__list a:hover { color: var(--c-brand-600); }

/* ---------------------------------------------------------------- 区块标题 */
.section-head { max-width: 72ch; margin-bottom: var(--sp-9); }
.section-head--center { margin-inline: auto; text-align: center; }
.section-head__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  margin-bottom: var(--sp-3);
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--c-accent-600);
}
/* 眉标前的短横线，替代纯文字，视觉上更成形 */
.section-head__eyebrow::before {
  content: "";
  width: 18px; height: 2px;
  border-radius: 2px;
  background: var(--grad-line);
}
.section-head--center .section-head__eyebrow::after {
  content: "";
  width: 18px; height: 2px;
  border-radius: 2px;
  background: var(--grad-line);
}
.section-head h2 { margin-bottom: var(--sp-4); }
.section-head p { font-size: var(--fs-md); color: var(--c-text-2); margin: 0; }
.on-dark .section-head__eyebrow { color: var(--c-accent-400); }

/* 编辑式标题：左大标题 + 右说明，横向铺开，取代"居中标题+居中说明" */
.section-head--split {
  max-width: none;
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  align-items: end;
  gap: var(--sp-8);
  padding-bottom: var(--sp-6);
  margin-bottom: var(--sp-9);
  border-bottom: 1px solid var(--c-border);
}
.section-head--split h2 { margin-bottom: 0; }
.section-head--split p { padding-bottom: 6px; }
.section-dark .section-head--split { border-bottom-color: rgba(255,255,255,.16); }
@media (max-width: 860px) {
  .section-head--split { grid-template-columns: minmax(0, 1fr); gap: var(--sp-4); align-items: start; }
}

/* 超大标题（首页各区块主标题用它撑气场） */
.h-display {
  font-size: clamp(30px, 4.2vw, 52px);
  line-height: 1.14;
  letter-spacing: -.025em;
  font-weight: 800;
  color: var(--c-text-1);
  margin: 0;
}
.section-dark .h-display { color: #fff; }

/* 带柔和光斑的浅色区块：让白色区域不再"一片死白" */
.section-glow { position: relative; isolation: isolate; overflow: hidden; }
.section-glow::before {
  content: "";
  position: absolute; z-index: -1;
  width: 560px; height: 560px;
  top: -200px; right: -160px;
  background: var(--glow-brand);
  pointer-events: none;
}
.section-glow::after {
  content: "";
  position: absolute; z-index: -1;
  width: 460px; height: 460px;
  bottom: -220px; left: -140px;
  background: var(--glow-accent);
  pointer-events: none;
}
/* 上下柔和过渡带：用于深浅区块衔接 */
.section-fade-top { background: var(--grad-section); }

/* ---------------------------------------------------------------- 卡片 */
.card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: var(--sp-7);
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-1);
  overflow: hidden;
  transition: box-shadow var(--dur-slow) var(--ease-out), transform var(--dur-slow) var(--ease-out),
              border-color var(--dur) var(--ease);
}
/* 悬停时顶部滑入一条渐变亮线 */
.card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--grad-line);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--dur-slow) var(--ease-out);
}
.card:hover {
  box-shadow: var(--shadow-brand);
  transform: translateY(-4px);
  border-color: var(--c-brand-100);
}
.card:hover::before { transform: scaleX(1); }

.card__icon {
  position: relative;
  flex: none;
  width: 46px; height: 46px;
  display: grid; place-items: center;
  margin-bottom: var(--sp-5);
  border-radius: 13px;
  background: linear-gradient(150deg, var(--c-brand-050) 0%, #DCEBF9 100%);
  color: var(--c-brand-600);
  box-shadow: var(--ring-top);
  transition: background var(--dur-slow) var(--ease-out),
              color var(--dur-slow) var(--ease-out),
              transform var(--dur-slow) var(--ease-out);
}
.card__icon svg { width: 24px; height: 24px; }
/* 悬停时图标块变成品牌渐变，形成明确反馈 */
.card:hover .card__icon {
  background: var(--grad-brand);
  color: #fff;
  transform: translateY(-2px) scale(1.04);
}
.card h3, .card h4 { font-size: var(--fs-lg); margin-bottom: var(--sp-3); }
.card p { font-size: var(--fs-sm); color: var(--c-text-2); margin-bottom: var(--sp-4); }
.card__foot { margin-top: auto; padding-top: var(--sp-4); }
.card--flat { box-shadow: none; }
.card--flat:hover { box-shadow: var(--shadow-2); }
.card--link { color: inherit; }
.card--link:hover { text-decoration: none; }

/* 编号卡（用于流程/步骤） */
.card__step {
  flex: none;
  display: inline-grid; place-items: center;
  width: 36px; height: 36px;
  margin-bottom: var(--sp-4);
  border-radius: var(--radius-pill);
  background: var(--grad-brand);
  color: #fff;
  font-size: var(--fs-sm);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  box-shadow: 0 4px 12px rgba(26, 102, 168, .26);
}

/* ---------------------------------------------------------------- 指标展示 */
.metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: var(--sp-5);
  margin: 0;
}
.metric {
  padding: var(--sp-5);
  background: linear-gradient(160deg, #FFFFFF 0%, var(--c-brand-050) 100%);
  border: 1px solid var(--c-brand-100);
  border-radius: var(--radius-md);
  box-shadow: var(--ring-top);
}
.metric__value {
  display: block;
  font-size: var(--fs-2xl);
  font-weight: 700;
  color: var(--c-brand-700);
  line-height: 1.15;
  font-variant-numeric: tabular-nums;
}
.metric__value small { font-size: var(--fs-sm); font-weight: 600; margin-left: 2px; color: var(--c-brand-600); }
.metric__label { display: block; margin-top: var(--sp-2); font-size: var(--fs-xs); color: var(--c-text-3); }

/* ---------------------------------------------------------------- 标签/徽章 */
.badge {
  display: inline-flex; align-items: center;
  padding: 2px var(--sp-3);
  border-radius: var(--radius-pill);
  background: var(--c-bg-muted);
  color: var(--c-text-2);
  font-size: var(--fs-xs);
  font-weight: 600;
  line-height: 1.7;
  white-space: nowrap;
}
.badge--brand { background: var(--c-brand-050); color: var(--c-brand-700); border: 1px solid var(--c-brand-100); }
.badge--accent { background: #E2F4F8; color: var(--c-accent-600); border: 1px solid #C7E9F1; }
.badge--outline { background: transparent; border: 1px solid var(--c-border-strong); color: var(--c-text-3); }

/* ---------------------------------------------------------------- 案例卡 */
.case-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: var(--sp-6); }
@media (max-width: 1024px) { .case-grid { grid-template-columns: repeat(2, minmax(0,1fr)); } }
@media (max-width: 680px)  { .case-grid { grid-template-columns: minmax(0,1fr); } }

/* 首张卡放大成 2x2：案例墙不再是六张一样大的方块 */
@media (min-width: 1025px) {
  .case-grid--lead { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .case-grid--lead > :first-child { grid-column: span 2; grid-row: span 2; }
  .case-grid--lead > :first-child .case-card__media { aspect-ratio: auto; height: 100%; min-height: 320px; }
  .case-grid--lead > :first-child { min-height: 560px; }
  .case-grid--lead > :first-child .case-card__client { font-size: var(--fs-xl); }
  .case-grid--lead > :first-child .case-card__desc { font-size: var(--fs-base); }
}

.case-card {
  position: relative;
  display: flex; flex-direction: column;
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-1);
  transition: box-shadow var(--dur-slow) var(--ease-out), transform var(--dur-slow) var(--ease-out),
              border-color var(--dur) var(--ease);
}
.case-card:hover {
  box-shadow: var(--shadow-brand);
  transform: translateY(-4px);
  border-color: var(--c-brand-100);
}
.case-card__media {
  position: relative;
  aspect-ratio: 16 / 9;
  /* 图片解码完成前会露出这层底纹。刻意做成"有意为之"的深色渐变，
     而不是一块死板的纯色，避免慢网络下出现突兀的深蓝方块。 */
  background:
    radial-gradient(70% 90% at 25% 20%, rgba(46, 134, 200, .30) 0%, rgba(6, 33, 63, 0) 70%),
    linear-gradient(135deg, #0A2E56 0%, #06213F 100%);
  overflow: hidden;
}
.case-card__media img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform var(--dur-slow) var(--ease-out);
}
.case-card:hover .case-card__media img { transform: scale(1.045); }
/* 图片底部一层渐变，使画面与白色卡片衔接更自然 */
.case-card__media::after {
  content: "";
  position: absolute; inset: auto 0 0 0;
  height: 44%;
  background: linear-gradient(180deg, rgba(6,33,63,0) 0%, rgba(6,33,63,.28) 100%);
  pointer-events: none;
}
.case-card__body { display: flex; flex-direction: column; flex: 1; padding: var(--sp-6); }
.case-card__client {
  font-size: var(--fs-md); font-weight: 700; color: var(--c-text-1);
  margin-bottom: var(--sp-2);
  transition: color var(--dur) var(--ease);
}
.case-card:hover .case-card__client { color: var(--c-brand-600); }
.case-card__desc { font-size: var(--fs-sm); color: var(--c-text-2); margin-bottom: var(--sp-5); }
.case-card__meta { display: flex; flex-wrap: wrap; gap: var(--sp-2); margin-bottom: var(--sp-5); }
.case-card__foot { margin-top: auto; }

/* 卡片上的关键数字条：把成效前置，一眼看到价值 */
.case-card__stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-5);
  margin: 0 0 var(--sp-5);
  padding: var(--sp-4) 0 0;
  border-top: 1px dashed var(--c-border);
}
.case-card__stat { display: flex; flex-direction: column; gap: 2px; }
.case-card__stat b {
  font-size: var(--fs-lg);
  font-weight: 700;
  color: var(--c-brand-600);
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
}
.case-card__stat b small { font-size: var(--fs-xs); font-weight: 600; margin-left: 1px; }
.case-card__stat span { font-size: 11px; color: var(--c-text-3); letter-spacing: .02em; }

/* 案例要点数字（内页复用） */
.case-metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--sp-4);
  margin: 0;
}
.case-metric {
  position: relative;
  padding: var(--sp-5);
  background: linear-gradient(160deg, #FFFFFF 0%, var(--c-bg-subtle) 100%);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-1), var(--ring-top);
  overflow: hidden;
  transition: box-shadow var(--dur-slow) var(--ease-out), transform var(--dur-slow) var(--ease-out);
}
.case-metric::before {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: var(--grad-line);
}
.case-metric:hover {
  box-shadow: var(--shadow-brand);
  transform: translateY(-3px);
}
.case-metric__value {
  display: block; font-size: var(--fs-2xl); font-weight: 700;
  color: var(--c-brand-700); line-height: 1.15; font-variant-numeric: tabular-nums;
}
.case-metric__value small { font-size: var(--fs-sm); font-weight: 600; margin-left: 2px; }
.case-metric__label { display: block; margin-top: var(--sp-2); font-size: var(--fs-xs); color: var(--c-text-3); }

/* ---------------------------------------------------------------- 步骤条 */
.steps { counter-reset: step; display: grid; gap: var(--sp-4); margin: 0; padding: 0; list-style: none; }
.steps--inline { grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }
.step {
  position: relative;
  padding: var(--sp-5) var(--sp-5) var(--sp-5) var(--sp-10);
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
}
.step::before {
  counter-increment: step;
  content: counter(step);
  position: absolute; left: var(--sp-4); top: var(--sp-5);
  width: 26px; height: 26px;
  display: grid; place-items: center;
  border-radius: var(--radius-pill);
  background: var(--c-brand-500); color: #fff;
  font-size: var(--fs-xs); font-weight: 700;
}
.step__title { font-weight: 700; color: var(--c-text-1); margin-bottom: var(--sp-2); font-size: var(--fs-base); }
.step__desc { font-size: var(--fs-sm); color: var(--c-text-2); margin: 0; }
.on-dark .step { background: rgba(255,255,255,.06); border-color: rgba(255,255,255,.16); }
.on-dark .step__title { color: #fff; }

/* ---------------------------------------------------------------- 图文分栏 */
.split { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: var(--sp-10); align-items: center; }
.split--media-right .split__media { order: 2; }
@media (max-width: 900px) {
  .split { grid-template-columns: minmax(0,1fr); gap: var(--sp-7); }
  .split--media-right .split__media { order: 0; }
}
.split__media {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--c-border);
  box-shadow: var(--shadow-3), var(--ring-top);
  background: var(--c-bg-subtle);
}
.split__media img { width: 100%; }
/* 图片外一圈极淡的品牌色描边，替代纯灰边框 */
.split__media::after {
  content: "";
  position: absolute; inset: 0;
  border-radius: inherit;
  box-shadow: inset 0 0 0 1px rgba(46, 134, 200, .10);
  pointer-events: none;
}
.split__media figcaption {
  padding: var(--sp-3) var(--sp-5);
  font-size: var(--fs-xs);
  color: var(--c-text-3);
  background: var(--c-bg-subtle);
  border-top: 1px solid var(--c-border);
}

/* 图片画廊 */
.gallery { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: var(--sp-5); }
@media (max-width: 680px) { .gallery { grid-template-columns: minmax(0,1fr); } }
.gallery figure {
  position: relative; margin: 0;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  overflow: hidden; background: #fff;
  box-shadow: var(--shadow-1);
  transition: box-shadow var(--dur-slow) var(--ease-out), transform var(--dur-slow) var(--ease-out);
}
.gallery figure:hover { box-shadow: var(--shadow-brand); transform: translateY(-3px); }
.gallery img { width: 100%; transition: transform var(--dur-slow) var(--ease-out); }
.gallery figure:hover img { transform: scale(1.03); }
.gallery figcaption { padding: var(--sp-3) var(--sp-4); font-size: var(--fs-xs); color: var(--c-text-3); border-top: 1px solid var(--c-border); }
.gallery--wide { grid-column: 1 / -1; }

/* ---------------------------------------------------------------- 清单 */
.checklist { list-style: none; margin: 0; padding: 0; }
.checklist li {
  position: relative;
  padding-left: var(--sp-7);
  margin-bottom: var(--sp-3);
  font-size: var(--fs-sm);
}
.checklist li::before {
  content: "";
  position: absolute; left: 0; top: .55em;
  width: 14px; height: 8px;
  border-left: 2px solid var(--c-accent-500);
  border-bottom: 2px solid var(--c-accent-500);
  transform: rotate(-45deg);
}

/* 定义列表（输入/实施/成果 三栏） */
.io {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--sp-5);
}
.io__col {
  position: relative;
  padding: var(--sp-5);
  background: linear-gradient(170deg, #FFFFFF 0%, var(--c-bg-subtle) 100%);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  box-shadow: var(--ring-top);
}
/* 三栏各用不同色条，区分"输入/实施/成果" */
.io__col::before {
  content: "";
  position: absolute;
  top: 0; left: var(--sp-5); right: var(--sp-5);
  height: 2px;
  border-radius: 2px;
  background: var(--grad-line);
  opacity: .5;
}
.io__col:nth-child(2)::before { background: linear-gradient(90deg, var(--c-brand-400), var(--c-brand-600)); opacity: .8; }
.io__col:nth-child(3)::before { background: linear-gradient(90deg, var(--c-accent-400), var(--c-accent-600)); opacity: .8; }
.io__col h4 {
  font-size: var(--fs-sm);
  color: var(--c-accent-600);
  letter-spacing: .04em;
  margin-bottom: var(--sp-3);
}
/* 三栏标题各自配色，区分"输入 / 实施 / 成果" */
.io__col:nth-child(1) h4 { color: var(--c-text-3); }
.io__col:nth-child(2) h4 { color: var(--c-brand-600); }
.io__col:nth-child(3) h4 { color: var(--c-accent-600); }
.io__col ul { margin: 0; padding-left: 1.2em; font-size: var(--fs-sm); }
.io__col li:last-child { margin-bottom: 0; }

/* ---------------------------------------------------------------- 表格 */
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  background: #fff;
  box-shadow: var(--shadow-1);
}
table.data { width: 100%; border-collapse: collapse; font-size: var(--fs-sm); min-width: 560px; }
table.data th, table.data td {
  padding: var(--sp-4) var(--sp-5);
  text-align: left;
  border-bottom: 1px solid var(--c-border);
  vertical-align: top;
}
table.data thead th {
  background: linear-gradient(180deg, #FFFFFF 0%, var(--c-bg-subtle) 100%);
  color: var(--c-text-1);
  font-weight: 700;
  white-space: nowrap;
  position: sticky; top: 0;
}
table.data tbody tr:last-child td { border-bottom: 0; }
table.data tbody tr { transition: background var(--dur) var(--ease); }
table.data tbody tr:hover { background: var(--c-brand-050); }
table.data td:first-child { color: var(--c-text-1); font-weight: 600; white-space: nowrap; }

/* ---------------------------------------------------------------- CTA 条 */
.cta-band {
  position: relative;
  isolation: isolate;
  background: var(--c-brand-700);
  color: #fff;
  overflow: hidden;
}
/* 光晕 + 点阵，与首屏呼应 */
.cta-band::before {
  content: "";
  position: absolute; inset: 0; z-index: -2;
  background:
    radial-gradient(70% 130% at 88% 12%, rgba(31,169,204,.32) 0%, rgba(6,33,63,0) 64%),
    linear-gradient(100deg, rgba(6,33,63,.55) 0%, rgba(16,63,110,0) 70%);
}
.cta-band::after {
  content: "";
  position: absolute; inset: 0; z-index: -1;
  background-image: var(--dots-light);
  background-size: 22px 22px;
  opacity: .38;
  mask-image: linear-gradient(90deg, transparent 0%, rgba(0,0,0,.7) 55%, rgba(0,0,0,.9) 100%);
  -webkit-mask-image: linear-gradient(90deg, transparent 0%, rgba(0,0,0,.7) 55%, rgba(0,0,0,.9) 100%);
}
.cta-band__inner {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: var(--sp-7);
  padding-block: var(--sp-9);
}
.cta-band h2 { color: #fff; margin-bottom: var(--sp-2); font-size: var(--fs-2xl); }
.cta-band p { color: #D3E1F1; margin: 0; max-width: 56ch; }
.cta-band__actions { display: flex; flex-wrap: wrap; gap: var(--sp-4); }

/* ---------------------------------------------------------------- 表单 */
.form { display: grid; gap: var(--sp-5); }
.form__row { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: var(--sp-5); }
@media (max-width: 680px) { .form__row { grid-template-columns: minmax(0,1fr); } }

.field { display: flex; flex-direction: column; gap: var(--sp-2); }
.field label { font-size: var(--fs-sm); font-weight: 600; color: var(--c-text-1); }
.field .req { color: var(--c-danger); margin-left: 2px; }
.field input[type="text"],
.field input[type="tel"],
.field input[type="email"],
.field select,
.field textarea {
  width: 100%;
  padding: var(--sp-3) var(--sp-4);
  font-family: inherit;
  font-size: var(--fs-sm);
  color: var(--c-text-1);
  background: #fff;
  border: 1px solid var(--c-border-strong);
  border-radius: var(--radius-md);
  box-shadow: var(--ring-top);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease),
              background var(--dur) var(--ease);
}
.field textarea { resize: vertical; min-height: 120px; }
.field input:hover, .field select:hover, .field textarea:hover { border-color: var(--c-brand-400); }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none;
  border-color: var(--c-brand-400);
  background: #FCFDFF;
  box-shadow: 0 0 0 3px rgba(46,134,200,.16), var(--ring-top);
}
.field input::placeholder, .field textarea::placeholder { color: #98A5B8; }
.field__hint { font-size: var(--fs-xs); color: var(--c-text-3); }
.field__error { font-size: var(--fs-xs); color: var(--c-danger); font-weight: 600; }
.field.has-error input, .field.has-error textarea, .field.has-error select {
  border-color: var(--c-danger);
  box-shadow: 0 0 0 3px rgba(176,42,42,.12);
}

/* 蜜罐字段：对真人隐藏，对爬虫可见 */
.hp-field {
  position: absolute !important;
  left: -9999px !important;
  width: 1px; height: 1px;
  overflow: hidden;
}

.form-consent { font-size: var(--fs-xs); color: var(--c-text-3); }

.alert {
  position: relative;
  padding: var(--sp-4) var(--sp-5) var(--sp-4) var(--sp-7);
  border-radius: var(--radius-md);
  font-size: var(--fs-sm);
  border: 1px solid;
  box-shadow: var(--ring-top);
}
/* 左侧状态色条，替代纯色块，信息层级更清楚 */
.alert::before {
  content: "";
  position: absolute;
  left: var(--sp-3); top: 50%;
  transform: translateY(-50%);
  width: 4px; height: 60%;
  border-radius: 3px;
}
.alert--success { background: #EDF8F2; border-color: #B9E2CC; color: #145C39; }
.alert--success::before { background: var(--c-success); }
.alert--error   { background: #FDF0F0; border-color: #F2C6C6; color: #8E2222; }
.alert--error::before { background: var(--c-danger); }
.alert--info    { background: var(--c-brand-050); border-color: var(--c-brand-100); color: var(--c-brand-700); }
.alert--info::before { background: var(--c-brand-500); }

/* ---------------------------------------------------------------- 联系信息 */
.contact-list { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--sp-5); }
.contact-list li { display: flex; gap: var(--sp-4); align-items: flex-start; margin: 0; }
.contact-list__icon {
  flex: none; width: 40px; height: 40px;
  display: grid; place-items: center;
  border-radius: 11px;
  background: linear-gradient(150deg, var(--c-brand-050) 0%, #DCEBF9 100%);
  color: var(--c-brand-600);
  box-shadow: var(--ring-top);
}
.contact-list__icon svg { width: 20px; height: 20px; }
.contact-list dt { font-size: var(--fs-xs); color: var(--c-text-3); margin-bottom: 2px; }
.contact-list dd { margin: 0; color: var(--c-text-1); font-weight: 600; }

/* ---------------------------------------------------------------- 页脚 */
.site-footer {
  position: relative;
  isolation: isolate;
  background: var(--c-brand-900);
  color: var(--c-text-inverse-dim);
  font-size: var(--fs-sm);
  overflow: hidden;
}
/* 顶部渐变细线 + 极淡点阵，收尾不空 */
.site-footer::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--grad-line);
  opacity: .55;
}
.site-footer::after {
  content: "";
  position: absolute; inset: 0; z-index: -1;
  background-image: var(--dots-light);
  background-size: 26px 26px;
  opacity: .28;
  mask-image: linear-gradient(180deg, rgba(0,0,0,.6) 0%, transparent 55%);
  -webkit-mask-image: linear-gradient(180deg, rgba(0,0,0,.6) 0%, transparent 55%);
}
.site-footer__top {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, minmax(0,1fr));
  gap: var(--sp-8);
  padding-block: var(--sp-10) var(--sp-8);
}
@media (max-width: 900px) { .site-footer__top { grid-template-columns: repeat(2, minmax(0,1fr)); } }
@media (max-width: 560px) { .site-footer__top { grid-template-columns: minmax(0,1fr); gap: var(--sp-7); } }

.site-footer .brand { color: #fff; }
.site-footer .brand__sub { color: var(--c-text-inverse-dim); }
.site-footer__about { margin-top: var(--sp-5); max-width: 42ch; line-height: 1.8; }
.site-footer h3 {
  position: relative;
  color: #fff;
  font-size: var(--fs-sm);
  letter-spacing: .06em;
  margin-bottom: var(--sp-5);
  padding-bottom: var(--sp-2);
}
.site-footer h3::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 20px; height: 2px;
  border-radius: 2px;
  background: var(--grad-line);
  opacity: .8;
}
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li { margin-bottom: var(--sp-3); }
.site-footer a { color: var(--c-text-inverse-dim); transition: color var(--dur) var(--ease); }
.site-footer a:hover { color: #fff; }
.site-footer__bottom {
  display: flex; flex-wrap: wrap; gap: var(--sp-4);
  align-items: center; justify-content: space-between;
  padding-block: var(--sp-5);
  border-top: 1px solid rgba(255,255,255,.12);
  font-size: var(--fs-xs);
  color: #9FB4CE;
}

/* ---------------------------------------------------------------- 其它 */
.note {
  position: relative;
  padding: var(--sp-5) var(--sp-6) var(--sp-5) var(--sp-7);
  background: linear-gradient(100deg, var(--c-brand-050) 0%, var(--c-bg-subtle) 100%);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  font-size: var(--fs-sm);
  box-shadow: var(--ring-top);
}
.note::before {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  border-radius: var(--radius-md) 0 0 var(--radius-md);
  background: var(--grad-line);
}
.note strong { display: block; margin-bottom: var(--sp-2); color: var(--c-text-1); }

/* ==========================================================================
   第二代表现手法：用于打破"每块都是卡片网格"的单调节奏
   ========================================================================== */

/* ---------------------------------------------------------------- 超大数字 */
.stat-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 0;
}
.stat-xl {
  position: relative;
  padding: var(--sp-6) var(--sp-7) var(--sp-6) 0;
}
.stat-xl + .stat-xl { padding-left: var(--sp-7); }
.stat-xl + .stat-xl::before {
  content: "";
  position: absolute; left: 0; top: var(--sp-4); bottom: var(--sp-4);
  width: 1px;
  background: linear-gradient(180deg, transparent, var(--c-border) 22%, var(--c-border) 78%, transparent);
}
.stat-xl__value {
  display: flex;
  align-items: baseline;
  gap: 3px;
  font-size: clamp(38px, 5vw, 60px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -.03em;
  background: linear-gradient(168deg, var(--c-brand-700) 8%, var(--c-accent-500) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
  font-variant-numeric: tabular-nums;
}
/* 不支持 background-clip 时退回实色，保证可读 */
@supports not ((-webkit-background-clip: text) or (background-clip: text)) {
  .stat-xl__value { color: var(--c-brand-700); -webkit-text-fill-color: currentColor; }
}
.stat-xl__value small { font-size: var(--fs-md); font-weight: 700; letter-spacing: 0; }
.stat-xl__label {
  display: block;
  margin-top: var(--sp-3);
  font-size: var(--fs-sm);
  color: var(--c-text-3);
  line-height: 1.5;
}
.on-dark .stat-xl__label, .section-dark .stat-xl__label { color: #AEC2DA; }
.section-dark .stat-xl + .stat-xl::before { background: rgba(255,255,255,.16); }
.section-dark .stat-xl__value {
  background: linear-gradient(168deg, #FFFFFF 10%, #8FD3EC 100%);
  -webkit-background-clip: text; background-clip: text;
  color: transparent; -webkit-text-fill-color: transparent;
}

/* ---------------------------------------------------------------- 编辑式列表
   用发丝分隔线 + 大留白代替卡片，横向排布，信息密度更高 */
.row-list { display: grid; gap: 0; margin: 0; padding: 0; list-style: none; }
.row-item {
  position: relative;
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--sp-6);
  padding: var(--sp-6) var(--sp-5) var(--sp-6) 0;
  border-top: 1px solid var(--c-border);
  color: inherit;
  transition: padding-left var(--dur-slow) var(--ease-out), background var(--dur) var(--ease);
}
.row-item:last-child { border-bottom: 1px solid var(--c-border); }
.row-item:hover {
  text-decoration: none;
  padding-left: var(--sp-4);
  background: linear-gradient(90deg, var(--c-brand-050) 0%, rgba(238,246,253,0) 78%);
}
/* 悬停时左侧出现一条渐变指示条 */
.row-item::before {
  content: "";
  position: absolute; left: 0; top: 0; bottom: 0;
  width: 3px;
  background: var(--grad-line);
  transform: scaleY(0);
  transform-origin: center;
  transition: transform var(--dur-slow) var(--ease-out);
}
.row-item:hover::before { transform: scaleY(1); }
.row-item__num {
  font-size: var(--fs-2xl);
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: 1;
  color: var(--c-brand-100);
  font-variant-numeric: tabular-nums;
  transition: color var(--dur) var(--ease);
}
.row-item:hover .row-item__num { color: var(--c-brand-400); }

/* 用图标替代序号时的槽位 */
.row-item__icon {
  display: grid; place-items: center;
  width: 52px; height: 52px;
  border-radius: 14px;
  background: linear-gradient(150deg, var(--c-brand-050) 0%, #DCEBF9 100%);
  color: var(--c-brand-600);
  box-shadow: var(--ring-top);
  transition: background var(--dur-slow) var(--ease-out), color var(--dur-slow) var(--ease-out);
}
.row-item__icon svg { width: 24px; height: 24px; }
.row-item:hover .row-item__icon { background: var(--grad-brand); color: #fff; }
.row-item__title {
  display: block;
  font-size: var(--fs-lg);
  font-weight: 700;
  color: var(--c-text-1);
  margin-bottom: var(--sp-2);
}
.row-item__desc { display: block; font-size: var(--fs-sm); color: var(--c-text-2); margin: 0; max-width: 74ch; }
.row-item__meta { display: flex; flex-wrap: wrap; gap: var(--sp-2); margin-top: var(--sp-3); }
.row-item__go {
  flex: none;
  display: grid; place-items: center;
  width: 40px; height: 40px;
  border-radius: 50%;
  border: 1px solid var(--c-border-strong);
  color: var(--c-text-3);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease),
              border-color var(--dur) var(--ease), transform var(--dur-slow) var(--ease-out);
}
.row-item:hover .row-item__go {
  background: var(--grad-brand);
  border-color: transparent;
  color: #fff;
  transform: translateX(4px);
}
@media (max-width: 720px) {
  .row-item { grid-template-columns: 40px minmax(0, 1fr); gap: var(--sp-4); }
  .row-item__go { display: none; }
  .row-item__num { font-size: var(--fs-xl); }
}

/* ---------------------------------------------------------------- 特色卡
   2x2 跨格的大卡 + 若干小卡，制造主次与不对称 */
.feature-card {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  min-height: 260px;
  padding: var(--sp-8);
  border-radius: var(--radius-xl);
  overflow: hidden;
  isolation: isolate;
  background: var(--c-brand-900);
  color: #fff;
  border: 1px solid rgba(255,255,255,.10);
  transition: transform var(--dur-slow) var(--ease-out), box-shadow var(--dur-slow) var(--ease-out);
}
.feature-card:hover { transform: translateY(-4px); box-shadow: 0 24px 48px rgba(6,33,63,.28); text-decoration: none; }
.feature-card__bg {
  position: absolute; inset: 0; z-index: -2;
  width: 100%; height: 100%; object-fit: cover; opacity: .34;
  transition: transform 700ms var(--ease-out), opacity var(--dur-slow) var(--ease-out);
}
.feature-card:hover .feature-card__bg { transform: scale(1.05); opacity: .44; }
.feature-card::after {
  content: "";
  position: absolute; inset: 0; z-index: -1;
  background:
    radial-gradient(70% 80% at 15% 10%, rgba(46,134,200,.42) 0%, rgba(6,33,63,0) 66%),
    linear-gradient(178deg, rgba(6,33,63,.55) 0%, rgba(6,33,63,.90) 100%);
}
.feature-card__eyebrow {
  position: absolute; top: var(--sp-7); left: var(--sp-8);
  font-size: var(--fs-xs); letter-spacing: .14em; text-transform: uppercase;
  color: var(--c-accent-400); font-weight: 700;
}
.feature-card h3 { color: #fff; font-size: var(--fs-2xl); margin-bottom: var(--sp-3); }
.feature-card p { color: #C9DAEC; font-size: var(--fs-sm); margin: 0; max-width: 40ch; }
.feature-card__tags { display: flex; flex-wrap: wrap; gap: var(--sp-2); margin-top: var(--sp-5); }
.feature-card__tags .badge {
  background: rgba(255,255,255,.12); color: #DCE9F7; border-color: rgba(255,255,255,.18);
}

/* ---------------------------------------------------------------- 流程步骤
   带连接线的横向流程，替代"编号小圆圈列表" */
.flow {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--sp-2);
  margin: 0; padding: 0; list-style: none;
  counter-reset: flow;
}
.flow__step {
  position: relative;
  padding: var(--sp-6) var(--sp-4) var(--sp-5);
  border-radius: var(--radius-md);
  transition: background var(--dur) var(--ease), transform var(--dur-slow) var(--ease-out);
}
.flow__step::before {
  counter-increment: flow;
  content: counter(flow, decimal-leading-zero);
  display: block;
  margin-bottom: var(--sp-3);
  font-size: var(--fs-xl);
  font-weight: 800;
  letter-spacing: -.02em;
  color: var(--c-brand-400);
  font-variant-numeric: tabular-nums;
}
/* 步骤之间的连接短线 */
.flow__step::after {
  content: "";
  position: absolute;
  top: calc(var(--sp-6) + 12px);
  right: calc(-1 * var(--sp-2));
  width: var(--sp-4);
  height: 1px;
  background: var(--c-border-strong);
}
.flow__step:last-child::after { display: none; }
.flow__step:hover { background: var(--c-brand-050); transform: translateY(-3px); }
.flow__title { font-size: var(--fs-base); font-weight: 700; color: var(--c-text-1); margin-bottom: var(--sp-2); }
.flow__desc { font-size: var(--fs-xs); color: var(--c-text-3); margin: 0; }
.section-dark .flow__step:hover { background: rgba(255,255,255,.07); }
.section-dark .flow__title { color: #fff; }
.section-dark .flow__desc { color: #AEC2DA; }
.section-dark .flow__step::after { background: rgba(255,255,255,.2); }

/* ---------------------------------------------------------------- 图片拼贴
   大小不一的图块，避免"等大图墙" */
.mosaic {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: var(--sp-5);
}
.mosaic__item {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--c-border);
  background: var(--c-brand-900);
  box-shadow: var(--shadow-2);
}
.mosaic__item img { width: 100%; height: 100%; object-fit: cover; display: block; }
.mosaic__item--wide { grid-column: span 4; aspect-ratio: 16 / 9; }
.mosaic__item--tall { grid-column: span 2; grid-row: span 2; }
.mosaic__item--half { grid-column: span 3; aspect-ratio: 16 / 10; }
/* 供模板动态追加的别名。
   表达式里不能出现连续两个短横线，所以模板用单短横线的 is-wide / is-half。 */
.mosaic__item.is-wide { grid-column: span 4; aspect-ratio: 16 / 9; }
.mosaic__item.is-half { grid-column: span 3; aspect-ratio: 16 / 10; }
.mosaic__cap {
  position: absolute; inset: auto 0 0 0;
  padding: var(--sp-5) var(--sp-5) var(--sp-4);
  background: linear-gradient(180deg, rgba(6,33,63,0) 0%, rgba(6,33,63,.86) 100%);
  color: #fff;
  font-size: var(--fs-sm);
  font-weight: 600;
}
@media (max-width: 900px) {
  .mosaic { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .mosaic__item--wide, .mosaic__item--half,
  .mosaic__item.is-wide, .mosaic__item.is-half { grid-column: span 2; }
  .mosaic__item--tall { grid-column: span 1; grid-row: span 1; aspect-ratio: 4 / 3; }
}
@media (max-width: 560px) {
  .mosaic { grid-template-columns: minmax(0, 1fr); }
  .mosaic__item--wide, .mosaic__item--half, .mosaic__item--tall,
  .mosaic__item.is-wide, .mosaic__item.is-half { grid-column: span 1; }
}

/* ---------------------------------------------------------------- 压边大图
   图片故意溢出边界，打破"所有东西都在版心内对齐"的呆板 */
.bleed {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-3);
  border: 1px solid var(--c-border);
}
.bleed img { width: 100%; display: block; }
@media (min-width: 1100px) {
  .bleed--right { margin-right: calc(-1 * var(--sp-11)); }
  .bleed--left  { margin-left:  calc(-1 * var(--sp-11)); }
}

/* ---------------------------------------------------------------- 引用陈述 */
.statement {
  position: relative;
  padding-left: var(--sp-8);
  font-size: clamp(20px, 2.4vw, 30px);
  font-weight: 700;
  line-height: 1.5;
  color: var(--c-text-1);
  letter-spacing: -.01em;
}
.statement::before {
  content: "";
  position: absolute; left: 0; top: .18em;
  width: 4px; height: 1.5em;
  border-radius: 2px;
  background: var(--grad-line);
}
.section-dark .statement { color: #fff; }

.timeline { list-style: none; margin: 0; padding: 0 0 0 var(--sp-7); border-left: 2px solid var(--c-brand-100); }
.timeline li { position: relative; padding-bottom: var(--sp-7); margin: 0; }
.timeline li:last-child { padding-bottom: 0; }
.timeline li::before {
  content: ""; position: absolute; left: calc(-1 * var(--sp-7) - 6px); top: .5em;
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--c-accent-400); box-shadow: 0 0 0 3px #fff;
}
.timeline__title { font-weight: 700; color: var(--c-text-1); margin-bottom: var(--sp-2); }

.tag-list { display: flex; flex-wrap: wrap; gap: var(--sp-2); margin: 0 0 var(--sp-6); padding: 0; list-style: none; }
.tag-list li { margin: 0; }

.prose h2 { margin-top: var(--sp-9); }
.prose h3 { margin-top: var(--sp-7); font-size: var(--fs-xl); }
.prose h2:first-child, .prose h3:first-child { margin-top: 0; }
.prose ul, .prose ol { font-size: var(--fs-sm); }
.prose > p { font-size: var(--fs-md); }