/**
 * 文件描述：轻量 AI 云（AI Infra）单页样式，配套 lists_single_ai_infra.htm
 * 覆盖价值 / 能力 / 优势 / 案例；底部 CTA 复用本文件后半 .zvf-cta 规则
 */

.ai-page {
  color: var(--on-surface, #1a2736);
  line-height: 1.6;
  isolation: isolate;
  overflow-x: clip;
  --page-main-min-h: var(--page-main-min-height, 0);
  --page-main-pad-b: var(--page-cta-footer-gap, 0);
  min-height: var(--page-main-min-h);
  padding-bottom: var(--page-main-pad-b);
}

.ai-page .section {
  padding-top: clamp(56px, 6vw, 96px);
  padding-bottom: clamp(56px, 6vw, 96px);
}

.ai-page .container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: clamp(16px, 3vw, 40px);
  padding-right: clamp(16px, 3vw, 40px);
  box-sizing: border-box;
}

.ai-section-head {
  text-align: center;
  margin-bottom: clamp(32px, 6vw, 96px);
}

.ai-section-title {
  margin: 0;
  font-size: clamp(28px, 2.6vw, 36px);
  font-weight: 700;
  color: #1a2736;
  line-height: 1.35;
}

.ai-section-desc {
  margin: 14px auto 0;
  font-size: 15px;
  color:var(--primary-dec);
  line-height: 1.75;
}

.ai-page .ai-fade {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.ai-page .ai-fade.in {
  opacity: 1;
  transform: none;
}

/* ── 1. 价值主张 ── */
.ai-value {
  background: linear-gradient(180deg, #639ce133 0%, #639ce113 60%, #639ce100 100%), #F8FAFC;
}

.ai-value-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(30px, 10vw, 102px);
  text-align: center;
}

.ai-value-icon {
  display: block;
  width: clamp(36px, 5vw, 56px);
  height: clamp(36px, 5vw, 54px);
  margin: 0 auto 18px;
  object-fit: contain;
}

.ai-value-title {
  margin: 0 0 10px;
  font-size: clamp(18px, 1.5vw, 20px);
  font-weight: 700;
  color: #1a2736;
  line-height: 1.4;
}

.ai-value-desc {
  margin: 0;
  font-size: 14px;
  color:var(--primary-dec);
  line-height: 1.7;
}

/* ── 2. 六项核心能力 ── */
.ai-caps {
  background: #ffffff;
}

.ai-caps-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(48px, 5vw, 64px) clamp(16px, 2vw, 24px);
}

.ai-cap-card {
  position: relative;
  padding: clamp(24px, 2.5vw, 32px);
  border-radius: var(--r8);
  background: linear-gradient(305deg, #f7fafc 9%, #f7fafc 9%, #f7fafc00 85%), #FFFFFF;
  transition: transform 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
}

.ai-cap-num {
  position: absolute;
  top: -28px;
  right: 0px;
  font-size: clamp(48px, 5vw, 64px);
  font-family: "Hanken Grotesk";
  font-style: italic;
  font-weight: 700;
  color: rgba(17, 83, 145, 0.12);
  line-height: 1;
  pointer-events: none;
  background: linear-gradient(180deg, #0b66b2 23%, #0b66b200 76%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-fill-color: transparent;
  width:90px;
}

.ai-cap-title {
  position: relative;
  z-index: 1;
  margin: 0 0 12px;
  font-size: clamp(17px, 1.4vw, 19px);
  font-weight: 700;
  color: #1a2736;
  line-height: 1.4;
  padding-right: 48px;
}

.ai-cap-desc {
  position: relative;
  z-index: 1;
  margin: 0 0 16px;
  font-size: 14px;
  color:var(--primary-dec);
  line-height: 1.7;
}

.ai-cap-list {
  position: relative;
  z-index: 1;
  margin: 0;
  padding: 0;
  list-style: none;
}

.ai-cap-list li {
  position: relative;
  padding-left: 26px;
  margin-bottom: 10px;
  font-size: 14px;
  color: #3d4a5c;
  line-height: 1.6;
}

.ai-cap-list li:last-child {
  margin-bottom: 0;
}

.ai-cap-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 3px;
  width: 16px;
  height: 16px;
  background: url(/static/skin/images/ai_infra/icon-gou.png) center / contain no-repeat;
}

.ai-cap-card--accent,
.ai-cap-card:hover {
  background: linear-gradient(253deg, #023d73 1%, #02569b 66%, #014a86 99%);
  box-shadow: 0 12px 28px rgba(17, 83, 145, 0.18);
  transform: translateY(-4px);
}

.ai-cap-card--accent .ai-cap-title,
.ai-cap-card:hover .ai-cap-title,
.ai-cap-card--accent .ai-cap-desc,
.ai-cap-card:hover .ai-cap-desc,
.ai-cap-card--accent .ai-cap-list li,
.ai-cap-card:hover .ai-cap-list li {
  color: #fff;
}

.ai-cap-card--accent .ai-cap-desc,
.ai-cap-card:hover .ai-cap-desc {
  color: rgba(255, 255, 255, 0.82);
}

.ai-cap-card--accent .ai-cap-num,
.ai-cap-card:hover .ai-cap-num {
  color: rgba(255, 255, 255, 0.18);
}

.ai-cap-card--accent .ai-cap-list li::before,
.ai-cap-card:hover .ai-cap-list li::before {
  filter: brightness(10);
}

.ai-page .ai-cap-card.ai-fade.in:hover {
  transform: translateY(-4px);
}

/* ── 3. 优势 ── */
.ai-adv {
  background: #f5f7fa;
}

.ai-adv-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(16px, 2vw, 20px);
}

.ai-adv-card {
  padding: clamp(24px, 2.5vw, 32px);
  border-radius: var(--r8);
  background: linear-gradient(295deg, #f7fafc 9%, #f7fafc 9%, #f7fafc00 85%), #FFFFFF;
  transition: transform 0.3s ease, background 0.3s ease, box-shadow 0.3s ease;
}

.ai-adv-title {
  margin: 0 0 12px;
  font-size: clamp(17px, 1.4vw, 19px);
  font-weight: 700;
  color: #1a2736;
  line-height: 1.4;
  transition: color 0.3s ease;
}

.ai-adv-desc {
  margin: 0;
  font-size: 14px;
  color:var(--primary-dec);
  line-height: 1.75;
  transition: color 0.3s ease;
}

.ai-adv-card:hover {
  background: linear-gradient(253deg, #023d73 1%, #02569b 66%, #014a86 99%);
  box-shadow: 0 12px 28px rgba(17, 83, 145, 0.18);
  transform: translateY(-4px);
}

.ai-adv-card:hover .ai-adv-title {
  color: #fff;
}

.ai-adv-card:hover .ai-adv-desc {
  color: rgba(255, 255, 255, 0.82);
}

.ai-page .ai-adv-card.ai-fade.in:hover {
  transform: translateY(-4px);
}

/* ── 4. 案例 ── */
.ai-cases {
  background: #ffffff;
}

.ai-cases-nav {
  display: flex;
  width: fit-content;
  max-width: 100%;
  margin: 0 auto 48px;
  padding: 0;
  justify-content: center;
  align-items: flex-end;
  gap: clamp(24px, 5vw, 68px);
  box-sizing: border-box;
}

.ai-cases-tab {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-bottom: -1px;
  padding: 12px 24px;
  border: none;

  background: transparent;
  font-size: var(--fs-18);
  font-weight: 600;
  font-family: inherit;
  color:var(--primary-dec);
  cursor: pointer;
  transition: background 0.25s linear, color 0.25s linear;
  min-width: 200px;
  border-bottom: 2px solid #C1C7D4;
}

.ai-cases-tab::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #c0c6d0;
  flex-shrink: 0;
}

.ai-cases-tab.is-active {
  background: #115391;
  color: #fff;
  z-index: 1;
  border-radius: var(--r8);
  border-bottom: 2px solid transparent;
}

.ai-cases-tab.is-active::before {
  background: #fff;
}

.ai-cases-tab.is-active::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -10px;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 10px 10px 0 10px;
  border-color: #115391 transparent transparent transparent;
  transform: translateX(-50%);
}

.ai-case-panel[hidden] {
  display: none !important;
}

.ai-case-card {
  position: relative;
  min-height: clamp(360px, 42vw, 420px);
  border-radius: var(--r8);
  background-color: #0b2a4a;
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
}

.ai-case-overlay {
  position: relative;
  z-index: 1;
  width: min(52%, 560px);
  min-height: inherit;
  padding: clamp(28px, 3vw, 40px);
  box-sizing: border-box;
  background: linear-gradient(270deg, #ffffffcc 0%, #ffffff 100%);
  border-radius: var(--r8);
}

.ai-case-tag {
  margin-bottom: 12px;
  font-size: 14px;
  font-weight: 600;
  color: #115391;
}

.ai-case-title {
  margin: 0 0 14px;
  font-size: var(--fs-24);
  font-weight: 700;
  color: #1a2736;
  line-height: 1.35;
}

.ai-case-lead {
  margin: 0 0 16px;
  font-size: var(--fs-14);
  color:var(--primary-dec);
  line-height: 1.75;
}

.ai-case-list {
  margin: 0 0 24px 20px;
  padding: 0;
  list-style: none;
}

.ai-case-list li {
  position: relative;
  padding-left: 28px;
  margin-bottom: 10px;
  font-size: 14px;
  color: #3d4a5c;
  line-height: 1.6;
}

.ai-case-list li:last-child {
  margin-bottom: 0;
}

.ai-case-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 2px;
  width: 18px;
  height: 18px;
  background: url(/static/skin/images/ai_infra/icon-gou.png) center / contain no-repeat;
}

.ai-case-metrics {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 0;
  padding-top: 28px;
}

.ai-case-metric {
  flex: 0 1 auto;
  width: max-content;
  max-width: 100%;
  padding: 0;
  text-align: left;
}

.ai-case-metric:not(:first-child) {
  border-left: 1px solid rgba(17, 83, 145, 0.18);
  margin-left: 28px;
  padding-left: 28px;
}

.ai-case-metric-label {
  font-size: 15px;
  font-weight: 600;
  color: #115391;
  line-height: 1.4;
}

.ai-case-metric-sub {
  margin-top: 4px;
  font-size: 12px;
  color: var(--primary-dec);
  line-height: 1.4;
}

@media (prefers-reduced-motion: reduce) {
  .ai-page .ai-fade,
  .ai-cap-card,
  .ai-adv-card {
    transition: none;
  }
  .ai-cap-card:hover,
  .ai-adv-card:hover,
  .ai-page .ai-cap-card.ai-fade.in:hover,
  .ai-page .ai-adv-card.ai-fade.in:hover {
    transform: none;
  }
}

@media (max-width: 1100px) {
  .ai-value-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .ai-caps-grid,
  .ai-adv-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .ai-case-overlay {
    width: min(64%, 520px);
  }
}

@media (max-width: 760px) {
  .ai-value-grid,
  .ai-caps-grid,
  .ai-adv-grid {
    grid-template-columns: 1fr;
  }

  .ai-cases-nav {
    width: 100%;
    max-width: 100%;
    gap: 0;
    margin-bottom: 24px;
    overflow: visible;
    justify-content: stretch;
  }

  .ai-cases-tab {
    flex: 1 1 0;
    min-width: 0;
    padding: 10px 6px;
    font-size: 13px;
    gap: 6px;
  }

  .ai-cases-tab.is-active::after {
    bottom: -8px;
    border-width: 8px 8px 0 8px;
  }

  /* 背景铺满卡片，正文 100% 叠在背景上 */
  .ai-case-card {
    min-height: clamp(320px, 88vw, 420px);
    padding-top: 0;
    background-size: 100% 100%;
    background-position: center;
    overflow: hidden;
  }

  .ai-case-overlay {
    width: 100%;
    min-height: inherit;
    margin-top: 0;
    border-radius: var(--r8);
    padding: 20px 16px;
    background: linear-gradient(180deg, #ffffffeb 0%, #fffffff2 55%, #ffffff 100%);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    box-sizing: border-box;
  }

  .ai-case-title {
    font-size: 18px;
  }

  .ai-case-metrics {
    display: flex;
    flex-direction: column;
  }

  .ai-case-metric {
    width: auto;
    max-width: none;
  }

  .ai-case-metric:not(:first-child) {
    border-left: 0;
    margin-left: 0;
    padding-left: 0;
    border-top: 1px solid rgba(17, 83, 145, 0.18);
    margin-top: 12px;
    padding-top: 12px;
  }
}


/* ===== legacy zvf styles (CTA etc.) ===== */
/**
 * ZVF 产品页样式
 * 颜色 / 字号一律使用 tokens.css 变量
 */

.ai-page,
.zvf-page {
  color: var(--on-surface);
  line-height: 1.6;
  isolation: isolate;
  overflow-x: clip;
  --page-main-min-h: var(--page-main-min-height);
  --page-main-pad-b: var(--page-cta-footer-gap);
  min-height: var(--page-main-min-h);
  padding-bottom: var(--page-main-pad-b);
}

.ai-page .section,
.zvf-page .section {
  padding-top: var(--section-py);
  padding-bottom: var(--section-py);
}

.zvf-section-head {
  text-align: center;
  margin-bottom: clamp(28px, calc(100vw * 60 / 1440), 60px);
}

.zvf-section-title {
  margin: 0;
  font-size: var(--fs-block-head);
  font-weight: 700;
  color: var(--on-surface);
  line-height: 1.3;
}

.zvf-section-desc {
  margin: 16px auto 0;
  font-size: var(--fs-16);
  color: var(--primary-dec);
  line-height: 1.75;
}

.zvf-reg {
  font-size: 0.65em;
  line-height: 0;
}

/* ── 滚动入场 ── */
.zvf-page .zvf-fade {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.zvf-page .zvf-fade.in {
  opacity: 1;
  transform: none;
}

/* fade 入场后的 transform:none 会盖住卡片 hover 上移，需更高优先级 */
.zvf-page .zvf-why-card.zvf-fade.in:hover,
.zvf-page .zvf-feat-card.zvf-fade.in:hover,
.zvf-page .zvf-case-card.zvf-fade.in:hover {
  transform: translateY(-6px);
}

.zvf-page .zvf-rise {
  opacity: 0;
  transform: translateY(30px);
  transition:
    opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}

.zvf-page .zvf-rise.in {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .zvf-page .zvf-fade,
  .zvf-page .zvf-rise {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ══════════════════════════════════════════
   Tab — 核心功能左侧竖向导航
   ══════════════════════════════════════════ */
.zvf-feat-layout {
  display: grid;
  grid-template-columns: minmax(180px, 240px) minmax(0, 1fr);
  gap: clamp(20px, calc(100vw * 32 / 1440), 32px);
  align-items: start;
}

.zvf-tabs {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 0;
  width: 100%;
}

.zvf-tab {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 52px;
  padding: 14px 16px;
  border: 1px solid rgba(193, 199, 212, 0.55);
  border-radius: var(--r8);
  background: #fff;
  font-size: var(--fs-16);
  font-weight: 500;
  color: var(--on-surface);
  cursor: pointer;
  text-align: center;
  line-height: 1.35;
  white-space: normal;
  transition: color 0.2s, background 0.2s, border-color 0.2s, box-shadow 0.2s;
}

.zvf-tab:hover {
  border-color: color-mix(in srgb, var(--primary) 35%, transparent);
  color: var(--primary);
}

.zvf-tab.is-active {
  color: #fff;
  background: #00579c;
  border-color: #00579c;
  font-weight: 600;
  box-shadow: 0 8px 20px rgba(0, 87, 156, 0.22);
}

.zvf-tab.is-active:hover {
  color: #fff;
  border-color: #00579c;
}

.zvf-panel {
  display: none;
}

.zvf-panel.is-active {
  display: block;
}

/* ══════════════════════════════════════════
   1. 为什么选择 ZVF
   ══════════════════════════════════════════ */
.zvf-why {
  background-color: #fff;
  background-image: linear-gradient(180deg, #639ce133 0%, #639ce113 60%, #639ce100 100%);
  background-repeat: no-repeat;
  background-size: 100% 198px;
}

.zvf-why-badges {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: clamp(98px, calc(100vw * 320 / 1440), 320px);
  margin: 0 auto clamp(60px, calc(100vw * 164 / 1440), 164px);
  text-align: left;
}

.zvf-why-badge {
  flex: 0 0 auto;
  max-width: clamp(180px, calc(100vw * 260 / 1440), 260px);
}

.zvf-why-badge-label {
  font-size: var(--fs-stat);
  font-weight: 700;
  color: var(--on-surface);
  line-height: 1.3;
  margin-bottom: 14px;
  padding-bottom: 14px;
  position: relative;
}

.zvf-why-badge-label::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 24px;
  height: 2px;
  background: var(--outline-variant);
  border-radius: 1px;
}

.zvf-why-badge-desc {
  margin: 0;
  font-size: var(--fs-14);
  color: var(--primary-dec);
  line-height: 1.6;
}

.zvf-why-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: clamp(16px, calc(100vw * 20 / 1440), 20px);
}

.zvf-why-card {
  position: relative;
  padding: clamp(24px, calc(100vw * 32 / 1440), 32px);
  border-radius: var(--r8);
  background: linear-gradient(180deg, rgba(248, 250, 252, 0.98) 0%, rgba(220, 236, 250, 0.98) 100%);
  overflow: hidden;
  transition:
    transform 0.3s cubic-bezier(0.22, 1, 0.36, 1),
    background 0.3s linear,
    box-shadow 0.3s linear;
}

.zvf-why-card::before {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0.35;
  background-image:
    linear-gradient(rgba(17, 83, 145, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(17, 83, 145, 0.08) 1px, transparent 1px);
  background-size: 28px 28px;
  pointer-events: none;
  transition: opacity 0.3s linear, background-image 0.3s linear;
}

.zvf-why-card-title,
.zvf-why-card-desc {
  position: relative;
  z-index: 1;
  transition: color 0.3s linear, opacity 0.3s linear;
}

.zvf-why-card-title {
  margin: 0 0 12px;
  font-size: var(--fs-22);
  font-weight: 700;
  color: var(--on-surface);
  line-height: 1.35;
}

.zvf-why-card-desc {
  margin: 0;
  font-size: var(--fs-14);
  color: var(--primary-dec);
  line-height: 1.75;
}

.zvf-why-card:hover {
  transform: translateY(-6px);
  background: linear-gradient(253deg, #023d73 1%, #02569b 66%, #014a86 99%), #F6FAFF;
  box-shadow: 0 12px 28px rgba(17, 83, 145, 0.18);
}

.zvf-why-card:hover::before {
  opacity: 0.12;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.2) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.2) 1px, transparent 1px);
}

.zvf-why-card:hover .zvf-why-card-title {
  color: #fff;
}

.zvf-why-card:hover .zvf-why-card-desc {
  color: rgba(255, 255, 255, 0.6);
}

@media (prefers-reduced-motion: reduce) {
  .zvf-why-card {
    transition: none;
  }

  .zvf-why-card:hover,
  .zvf-page .zvf-why-card.zvf-fade.in:hover {
    transform: none;
  }
}

/* ══════════════════════════════════════════
   2. 产品架构
   ══════════════════════════════════════════ */
.zvf-arch {
  background: #F8FAFC;
}

.zvf-arch-diagram {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: clamp(40px, calc(100vw * 56 / 1440), 56px);
}

.zvf-arch-layer {
  display: grid;
  grid-template-columns: clamp(48px, calc(100vw * 56 / 1440), 56px) 1fr;
  gap: 12px;
  align-items: stretch;
}

.zvf-arch-layer-label {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  display: flex;
  align-items: center;
  justify-content: center;
  letter-spacing: 0.12em;
  font-size: var(--fs-14);
  font-weight: 600;
  color: #fff;
  background: var(--blue);
  border-radius: var(--r8);
  padding: 12px 0;
}

.zvf-arch-layer-body {
  min-width: 0;
}

.zvf-arch-layer-body--row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.zvf-arch-layer-body--framed {
  border: 1px dashed color-mix(in srgb, var(--primary) 35%, transparent);
  border-radius: var(--r12);
  padding: clamp(12px, calc(100vw * 16 / 1440), 16px);
  background: color-mix(in srgb, var(--primary) 4%, #fff);
}

.zvf-arch-module {
  background: #fff;
  border: 1px solid color-mix(in srgb, var(--primary) 22%, #fff);
  border-radius: var(--r8);
  padding: clamp(14px, calc(100vw * 18 / 1440), 18px) clamp(16px, calc(100vw * 20 / 1440), 20px);
}

.zvf-arch-module--wide {
  width: 100%;
}

.zvf-arch-module-head {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 6px;
}

.zvf-arch-module-name {
  font-size: var(--fs-18);
  font-weight: 700;
  color: var(--primary);
  line-height: 1.35;
}

.zvf-arch-module-sub {
  margin: 6px 0 0;
  font-size: var(--fs-14);
  color: var(--on-surface-variant);
  line-height: 1.6;
}

.zvf-arch-badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: var(--r8);
  background: var(--blue-bg);
  color: var(--primary);
  font-size: var(--fs-12);
  font-weight: 500;
  line-height: 1.6;
  white-space: nowrap;
}

.zvf-arch-zsphere {
  background: #fff;
  border: 1px solid color-mix(in srgb, var(--primary) 22%, #fff);
  border-radius: var(--r8);
  padding: clamp(14px, calc(100vw * 18 / 1440), 18px);
  margin-bottom: 12px;
}

.zvf-arch-cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.zvf-arch-col {
  background: #fff;
  border: 1px solid color-mix(in srgb, var(--primary) 22%, #fff);
  border-radius: var(--r8);
  padding: clamp(14px, calc(100vw * 16 / 1440), 16px);
}

.zvf-arch-list {
  margin: 10px 0 0;
  padding: 0;
  list-style: none;
}

.zvf-arch-list li {
  position: relative;
  padding-left: 16px;
  margin-bottom: 8px;
  font-size: var(--fs-14);
  color: var(--on-surface-variant);
  line-height: 1.55;
}

.zvf-arch-list li:last-child {
  margin-bottom: 0;
}

.zvf-arch-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  border-radius: 1px;
  background: var(--primary);
}

.zvf-arch-table-title {
  margin: 0 0 20px;
  text-align: center;
  font-size: var(--fs-section-title);
  font-weight: 700;
  color: var(--on-surface);
}

.zvf-arch-table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: var(--r8);
  border: 1px solid var(--slate-200);
}

.zvf-arch-table {
  width: 100%;
  min-width: 720px;
  border-collapse: collapse;
  font-size: var(--fs-14);
}

.zvf-arch-table th {
  background: var(--blue);
  color: #fff;
  font-weight: 600;
  text-align: left;
  padding: 14px 16px;
}

.zvf-arch-table td {
  padding: 14px 16px;
  color: var(--on-surface);
  line-height: 1.6;
  border-bottom: 1px solid var(--slate-200);
  vertical-align: top;
}

.zvf-arch-table tbody tr:nth-child(even) {
  background: var(--slate-50);
}

.zvf-arch-table tbody tr:nth-child(odd) {
  background: #fff;
}

.zvf-arch-table td:nth-child(odd) {
  font-weight: 700;
  white-space: nowrap;
}

/* ══════════════════════════════════════════
   3. 核心功能
   ══════════════════════════════════════════ */
.zvf-feat {
  background: linear-gradient(180deg, #639ce100 0%, #639ce113 60%, #639ce133 100%), #FFFFFF;
}

.zvf-feat-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: clamp(16px, calc(100vw * 20 / 1440), 20px);
}

.zvf-feat-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: clamp(24px, calc(100vw * 32 / 1440), 32px);
  border-radius: var(--r8);
  background: linear-gradient(180deg, rgba(248, 250, 252, 0.98) 0%, rgba(220, 236, 250, 0.98) 100%);
  box-shadow: 0 4px 16px rgba(17, 83, 145, 0.06);
  overflow: hidden;
  transition:
    transform 0.3s cubic-bezier(0.22, 1, 0.36, 1),
    background 0.3s linear,
    box-shadow 0.3s linear;
}

.zvf-feat-card::before {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0.35;
  background-image:
    linear-gradient(rgba(17, 83, 145, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(17, 83, 145, 0.08) 1px, transparent 1px);
  background-size: 28px 28px;
  pointer-events: none;
  transition: opacity 0.3s linear, background-image 0.3s linear;
}

.zvf-feat-title,
.zvf-feat-desc {
  position: relative;
  z-index: 1;
  transition: color 0.3s linear;
}

.zvf-feat-title {
  margin: 0;
  font-size: var(--fs-22);
  font-weight: 700;
  color: var(--on-surface);
  line-height: 1.35;
}

.zvf-feat-desc {
  margin: 0;
  font-size: var(--fs-14);
  color: var(--primary-dec);
  line-height: 1.75;
}

.zvf-feat-card:hover {
  transform: translateY(-6px);
  background: linear-gradient(253deg, #023d73 1%, #02569b 66%, #014a86 99%), #F6FAFF;
  box-shadow: 0 12px 28px rgba(17, 83, 145, 0.18);
}

.zvf-feat-card:hover::before {
  opacity: 0.12;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.2) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.2) 1px, transparent 1px);
}

.zvf-feat-card:hover .zvf-feat-title {
  color: #fff;
}

.zvf-feat-card:hover .zvf-feat-desc {
  color: rgba(255, 255, 255, 0.72);
}

@media (prefers-reduced-motion: reduce) {
  .zvf-feat-card {
    transition: none;
  }

  .zvf-feat-card:hover,
  .zvf-page .zvf-feat-card.zvf-fade.in:hover {
    transform: none;
  }
}

/* ══════════════════════════════════════════
   4. 应用场景
   ══════════════════════════════════════════ */
.zvf-scene {
  background: #fff;
  padding-bottom: 0;
}

.zvf-scene-list-wrap {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.zvf-scene-panel {
  padding: clamp(40px, calc(100vw * 64 / 1440), 64px) 0;
}

.zvf-scene-panel:nth-child(1) {
  background: #FFFFFF;
  padding-top: 0;
}

.zvf-scene-panel:nth-child(2) {
  background: #F8FAFC;
}

.zvf-scene-panel:nth-child(3) {
  background: #FFFFFF;
}

.zvf-scene-panel:nth-child(4) {
  background: #F8FAFC;
}

.zvf-scene-panel-inner {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 2fr); /* 文案 60% / 图 40% */
  gap: clamp(28px, calc(100vw * 48 / 1440), 48px);
  align-items: center;
}

.zvf-scene-panel--reverse .zvf-scene-panel-inner {
  direction: rtl;
}

.zvf-scene-panel--reverse .zvf-scene-panel-inner > * {
  direction: ltr;
}

.zvf-scene-heading {
  margin: 0 0 20px;
  font-size: var(--fs-section-title);
  font-weight: 700;
  color: var(--on-surface);
  line-height: 1.35;
}

.zvf-scene-label {
  margin: 0 0 8px;
  font-size: var(--fs-16);
  font-weight: 400;
  color: var(--primary);
}

.zvf-scene-text {
  margin: 0 0 20px;
  font-size: var(--fs-16);
  color: var(--primary-dec);
  line-height: 1.75;
}

.zvf-scene-list {
  margin: 0 0 28px;
  padding: 0 0 0 1.25em;
  list-style: disc;
  color: var(--primary-dec);
  font-size: var(--fs-16);
  line-height: 1.75;
}

.zvf-scene-list li {
  margin-bottom: 10px;
  list-style: disc;
}

.zvf-scene-list li:last-child {
  margin-bottom: 0;
}

.zvf-scene-btn.btn-primary {
  --hero-btn-icon: min(30px, calc(var(--hero-btn-height) * 0.75));
  box-sizing: border-box;
  min-width: clamp(120px, calc(100vw * 150 / 1920), 150px);
  height: var(--hero-btn-height);
  padding: 0 clamp(16px, calc(100vw * 24 / 1920), 24px);
  font-size: var(--fs-20);
  font-weight: 500;
  border-radius: var(--r8);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: clamp(5px, calc(100vw * 7 / 1920), 7px);
  transition: all 0.2s;
  line-height: 1;
  white-space: nowrap;
  text-decoration: none;
  background: var(--primary);
  color: #fff;
  border: 1px solid var(--primary);
}

.zvf-scene-btn.btn-primary .svg_span {
  width: var(--hero-btn-icon);
  height: var(--hero-btn-icon);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #fff;
  border-radius: 50%;
  color: var(--primary);
  border: 1px solid var(--primary);
}

.zvf-scene-btn.btn-primary .svg_span svg {
  width: 55%;
  height: 55%;
  transform: rotate(-35deg);
}

.zvf-scene-btn.btn-primary:hover {
  background: var(--primary-container);
}

.zvf-scene-visual img {
  display: block;
  width: 100%;
  height: auto;
  /* 与区块底色溶合：multiply 适合浅底上去掉白底感 */
  mix-blend-mode: multiply;
}

/* ══════════════════════════════════════════
   5. 客户案例
   ══════════════════════════════════════════ */
.zvf-cases {
  background: #fff;
}

.zvf-cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(16px, calc(100vw * 24 / 1440), 24px);
  margin-bottom: clamp(28px, calc(100vw * 40 / 1440), 40px);
}

.zvf-case-card {
  display: block;
  background: #fff;
  border: 1px solid rgba(193, 199, 212, 0.3);
  border-radius: var(--r8);
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  transition:
    transform 0.3s cubic-bezier(0.22, 1, 0.36, 1),
    box-shadow 0.3s ease;
}

.zvf-case-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 28px rgba(17, 83, 145, 0.12);
}

@media (prefers-reduced-motion: reduce) {
  .zvf-case-card {
    transition: none;
  }

  .zvf-case-card:hover,
  .zvf-page .zvf-why-card.zvf-fade.in:hover,
  .zvf-page .zvf-feat-card.zvf-fade.in:hover,
  .zvf-page .zvf-case-card.zvf-fade.in:hover {
    transform: none;
  }
}

.zvf-case-cover {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.zvf-case-title {
  margin: 0;
  padding: clamp(16px, calc(100vw * 20 / 1440), 20px) clamp(16px, calc(100vw * 20 / 1440), 20px) 10px;
  font-size: var(--fs-18);
  font-weight: 700;
  color: var(--primary);
  line-height: 1.4;
}

.zvf-case-desc {
  margin: 0;
  padding: 0 clamp(16px, calc(100vw * 20 / 1440), 20px) clamp(16px, calc(100vw * 20 / 1440), 20px);
  font-size: var(--fs-14);
  color: var(--primary-dec);
  line-height: 1.7;
}

.zvf-cases-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  text-align: center;
  padding: clamp(20px, calc(100vw * 28 / 1440), 28px);
  border-radius: var(--r12);
  background: var(--slate-50);
}

.zvf-cases-stat-val {
  font-size: var(--fs-stat);
  font-weight: 700;
  color: var(--primary);
  line-height: 1.2;
  margin-bottom: 6px;
}

.zvf-cases-stat-label {
  font-size: var(--fs-14);
  color: var(--on-surface-variant);
}

/* ══════════════════════════════════════════
   6. 中部 CTA
   ══════════════════════════════════════════ */
.zvf-midcta {
  position: relative;
  text-align: center;
  background: var(--surface) center / cover no-repeat;
  overflow: hidden;
}

.zvf-midcta-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}

.zvf-midcta .container {
  position: relative;
  z-index: 1;
}

.zvf-midcta-title {
  margin: 0 0 16px;
  font-size: var(--fs-block-head);
  font-weight: 700;
  color: var(--on-surface);
  line-height: 1.35;
}

.zvf-midcta-desc {
  margin: 0 auto;
  max-width: 860px;
  font-size: var(--fs-18);
  color: var(--primary);
  line-height: 1.8;
}

/* ══════════════════════════════════════════
   7. 底部咨询表单（对齐线上 AIOS 通用 product_cta）
   ══════════════════════════════════════════ */
.zvf-cta.section {
  padding-top: clamp(48px, calc(100vw * 72 / 1440), 72px);
  padding-bottom: clamp(48px, calc(100vw * 72 / 1440), 72px);
}

.zvf-cta {
  background: linear-gradient(180deg, #639ce11f 0%, #639ce10b 60%, #639ce100 100%), #fff;
}

.zvf-cta-inner {
  display: grid;
  grid-template-columns: 1fr 1.05fr;
  gap: clamp(32px, calc(100vw * 56 / 1440), 56px);
  align-items: start;
}

.zvf-cta-title {
  margin: 0 0 16px;
  font-size: clamp(24px, calc(100vw * 36 / 1440), 36px);
  font-weight: 700;
  color: #181c22;
  line-height: 1.35;
}

.zvf-cta-desc {
  margin: 0 0 clamp(24px, calc(100vw * 32 / 1440), 32px);
  font-size: clamp(13px, calc(100vw * 15 / 1440), 15px);
  color: #64748b;
  line-height: 1.7;
}

.zvf-cta-btns {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  pointer-events: none;
  user-select: none;
}

.zvf-cta-tag {
  display: inline-block;
  padding: 10px 20px;
  border-radius: var(--r8, 8px);
  background: rgba(0, 87, 156, 0.05);
  border: 1px solid rgba(0, 87, 156, 0.1);
  color: var(--primary, #00579c);
  font-size: var(--fs-14, 14px);
  font-weight: 500;
  line-height: 1.2;
  cursor: default;
}

.zvf-cta-form {
  background: #fff;
  border-radius: 12px;
  border: 1px solid #e8edf3;
  padding: clamp(20px, calc(100vw * 28 / 1440), 28px);
  box-shadow: 0 4px 20px rgba(17, 83, 145, 0.06);
}

.zvf-cta-form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-bottom: 12px;
}

.zvf-cta-field--full {
  grid-column: 1 / -1;
}

.zvf-cta-input,
.zvf-cta-select {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  font-size: var(--fs-16, 16px);
  color: #00579c;
  background: #fff;
  box-sizing: border-box;
  transition: border-color 0.2s;
}

.zvf-cta-input::placeholder {
  color: #94a3b8;
}

.zvf-cta-select {
  color: #64748b;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
}

.zvf-cta-input:focus,
.zvf-cta-select:focus {
  outline: none;
  border-color: #00579c;
}

.zvf-cta-form-note {
  margin: 0 0 16px;
  font-size: var(--fs-12, 12px);
  color: #94a3b8;
  line-height: 1.5;
}

.zvf-cta-submit {
  width: 100%;
  padding: 14px;
  border: none;
  border-radius: 8px;
  background: #00579c;
  color: #fff;
  font-size: var(--fs-16, 16px);
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s, transform 0.2s;
}

.zvf-cta-submit:hover {
  background: #004882;
  transform: translateY(-1px);
}

/* ══════════════════════════════════════════
   移动端
   ══════════════════════════════════════════ */
@media (max-width: 1024px) {
  .zvf-cta-inner,
  .zvf-scene-panel-inner,
  .zvf-scene-panel--reverse .zvf-scene-panel-inner {
    grid-template-columns: 1fr;
    direction: ltr;
  }

  .zvf-scene-visual {
    order: -1;
  }

  .zvf-cases-grid {
    grid-template-columns: 1fr;
    max-width: 520px;
    margin-left: auto;
    margin-right: auto;
  }
}

@media (max-width: 768px) {
  .zvf-why-badges {
    align-items: flex-start;
    gap: 40px;
    margin-bottom: 40px;
    text-align: center;
  }

  .hero-slide-bg img {
    object-fit: cover;
    object-position: 69% center;
}

  .zvf-why-badge-label::after{
     right: 0;
     margin: 0 auto;
  }

  .hero {
    overflow: visible;
    padding-bottom: 0px;
    margin-bottom: 0px;
}

  .zvf-why-badge {
    max-width: none;
  }

  .zvf-why-badge-desc {
    max-width: none;
    width: auto;
  }

  .zvf-why-grid,
  .zvf-feat-grid,
  .zvf-arch-layer-body--row,
  .zvf-arch-cols {
    grid-template-columns: 1fr;
  }

  .zvf-arch-layer {
    grid-template-columns: 1fr;
  }

  .zvf-arch-layer-label {
    writing-mode: horizontal-tb;
    text-orientation: mixed;
    letter-spacing: 0.06em;
    padding: 10px 14px;
    justify-content: flex-start;
  }

  .zvf-feat-layout {
    grid-template-columns: 1fr;
  }

  .zvf-tabs {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
  }

  .zvf-tab {
    min-height: 44px;
    padding: 10px 8px;
    font-size: var(--fs-14);
  }

  .zvf-cases-stats {
    grid-template-columns: 1fr;
  }

  .zvf-cta-form-grid {
    grid-template-columns: 1fr;
  }

  .zvf-cta-btns {
    flex-direction: column;
  }

  .zvf-cta-tag {
    text-align: center;
  }
}