/* ====================================================================
   CESIPC solutions-2.css — 解决方案中心 redesign v2
   方案 B：图文卡片 + 悬停展开 + 图片占位系统
==================================================================== */

/* =============================================================
   0.  CSS 变量
============================================================= */
:root {
  --s2-gap: 20px;
  --s2-radius: 12px;
  --s2-shadow: 0 4px 20px rgba(13,31,90,0.08);
  --s2-shadow-hover: 0 20px 50px rgba(13,31,90,0.18);
  --s2-transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

/* =============================================================
   1.  Hero — 双栏版：左文案 / 右统计玻璃卡片
============================================================= */
.page-hero--solutions-v2 {
  position: relative;
  background:
    linear-gradient(135deg, rgba(51,117,175,.95) 0%, rgba(20,55,90,.97) 100%),
    radial-gradient(circle at 85% 20%, rgba(255,219,106,.14) 0%, transparent 45%),
    radial-gradient(circle at 15% 85%, rgba(255,255,255,.06) 0%, transparent 50%);
  padding: var(--sp-12) 0 var(--sp-10);
  overflow: hidden;
  color: #fff;
}
.page-hero--solutions-v2::before {
  content: "";
  position: absolute; inset: 0;
  pointer-events: none;
  background-image: radial-gradient(circle at 1px 1px, rgba(255,255,255,.05) 1px, transparent 0);
  background-size: 36px 36px;
  mask-image: linear-gradient(135deg, rgba(0,0,0,.5) 0%, transparent 70%);
  -webkit-mask-image: linear-gradient(135deg, rgba(0,0,0,.5) 0%, transparent 70%);
}
.page-hero--solutions-v2::after {
  content: "";
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--c-accent), #e85530 40%, transparent);
}

.s2h-grid {
  position: relative; z-index: 1;
  display: grid;
  grid-template-columns: 1.25fr 1fr;
  align-items: center;
  gap: var(--sp-12);
}

.s2h-main { text-align: left; }
.page-hero--solutions-v2 .page-hero__breadcrumb { justify-content: flex-start; }
.s2h-eyebrow {
  display: inline-block;
  font-size: var(--fs-xs); font-weight: 700;
  letter-spacing: 0.2em; text-transform: uppercase;
  color: #ffdb6a; margin: var(--sp-3) 0 var(--sp-2);
}
.page-hero--solutions-v2 .page-hero__title {
  font-size: 42px; line-height: 1.2; max-width: 560px;
  margin: 0 0 var(--sp-3); text-align: left;
}
.page-hero--solutions-v2 .page-hero__title span { color: #ffdb6a; }
.page-hero--solutions-v2 .page-hero__sub {
  font-size: var(--fs-lg); line-height: 1.7;
  max-width: 540px; color: rgba(255,255,255,.82);
  margin: 0 0 var(--sp-6); text-align: left;
}
.page-hero--solutions-v2 .page-hero__sub strong { color: #ffdb6a; font-weight: 700; }
.page-hero--solutions-v2 .page-hero__actions {
  justify-content: flex-start; margin: 0 0 var(--sp-6);
}

/* 平台速览 chips */
.s2h-platforms {
  display: flex; flex-wrap: wrap; gap: var(--sp-3);
  list-style: none; margin: 0; padding: 0;
}
.s2h-platforms li {
  display: inline-flex; align-items: center; gap: 7px;
  font-size: var(--fs-xs); font-weight: 600;
  color: rgba(255,255,255,.75);
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.16);
  border-radius: 999px; padding: 6px 14px;
}
.s2h-dot { width: 7px; height: 7px; border-radius: 50%; flex: none; }
.s2h-dot--compute { background: #5ba3e8; }
.s2h-dot--front   { background: #4ec9b0; }
.s2h-dot--clean   { background: #e8a838; }
.s2h-dot--field   { background: #e07050; }

/* 右侧统计玻璃卡片 2x2 */
.s2h-stats {
  position: relative; z-index: 1;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--sp-4);
}
.s2h-stat {
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.14);
  border-radius: var(--radius-lg);
  padding: var(--sp-5);
  backdrop-filter: blur(6px);
  transition: background 0.25s ease, border-color 0.25s ease, transform 0.25s ease;
}
.s2h-stat:hover {
  background: rgba(255,255,255,.10);
  border-color: rgba(255,219,106,.40);
  transform: translateY(-3px);
}
.s2h-stat__icon {
  display: block; width: 22px; height: 22px;
  color: #ffdb6a; margin-bottom: var(--sp-3); opacity: 0.9;
}
.s2h-stat__num {
  display: block; font-family: 'Inter', sans-serif;
  font-size: 30px; font-weight: 800; color: #fff;
  line-height: 1; letter-spacing: -0.02em; margin-bottom: var(--sp-1);
}
.s2h-stat__num small { font-size: 55%; color: #ffdb6a; }
.s2h-stat__lbl {
  font-size: var(--fs-sm); color: rgba(255,255,255,.68); font-weight: 500;
}

@media (max-width: 900px) {
  .s2h-grid { grid-template-columns: 1fr; gap: var(--sp-8); }
  .s2h-stats { max-width: 480px; }
}
@media (max-width: 768px) {
  .page-hero--solutions-v2 { padding: var(--sp-8) 0 var(--sp-6); }
  .page-hero--solutions-v2 .page-hero__title { font-size: 30px; }
  .s2h-stat__num { font-size: 24px; }
  .s2h-stat { padding: var(--sp-4); }
}
@media (max-width: 640px) {
  .page-hero--solutions-v2 { padding: var(--sp-7) 0; }
  .page-hero--solutions-v2 .page-hero__title { font-size: 24px; }
  .s2h-stats { grid-template-columns: 1fr 1fr; gap: var(--sp-3); }
}

/* =============================================================
   2.  按平台筛选条（新增）
============================================================= */
.s2-platform-filter {
  background: #fff;
  border-bottom: 1px solid var(--c-border);
  padding: var(--sp-4) 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 12px rgba(0,0,0,0.04);
}
.s2-platform-filter .container {
  display: flex; align-items: center;
  gap: var(--sp-4); flex-wrap: wrap;
}
.s2-platform-filter__label {
  font-size: var(--fs-sm); font-weight: 700;
  color: var(--c-text-2); white-space: nowrap;
}
.s2-platform-filter__list {
  display: flex; gap: var(--sp-2); list-style: none;
  margin: 0; padding: 0; flex: 1; flex-wrap: wrap;
}
.s2-platform-filter__list a {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 18px; font-size: var(--fs-sm);
  color: var(--c-text-2); background: var(--c-bg-alt);
  border: 1px solid var(--c-border);
  border-radius: 999px; text-decoration: none;
  transition: all 0.2s ease; font-weight: 600;
  white-space: nowrap;
}
.s2-platform-filter__list a:hover,
.s2-platform-filter__list a.is-active {
  color: #fff; background: var(--c-primary);
  border-color: var(--c-primary);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(51,117,175,0.25);
}
.s2-platform-filter__list a .s2-dot {
  width: 8px; height: 8px; border-radius: 50%;
}
.s2-platform-filter__list a .s2-dot--compute { background: #5ba3e8; }
.s2-platform-filter__list a .s2-dot--front   { background: #4ec9b0; }
.s2-platform-filter__list a .s2-dot--clean   { background: #e8a838; }
.s2-platform-filter__list a .s2-dot--field   { background: #e07050; }

/* =============================================================
   4.  图片占位系统（核心）
============================================================= */
/* 占位图基础 */
.s2-ph {
  position: relative;
  background: linear-gradient(135deg, #e8eef5 0%, #dde5f0 50%, #e8eef5 100%);
  background-size: 200% 200%;
  animation: s2PhShimmer 2.5s ease-in-out infinite;
  overflow: hidden;
}
@keyframes s2PhShimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}
.s2-ph::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    radial-gradient(circle at 30% 40%, rgba(51,117,175,0.08) 0%, transparent 50%),
    radial-gradient(circle at 70% 60%, rgba(51,117,175,0.05) 0%, transparent 40%);
}
.s2-ph::after {
  content: attr(data-ph-label);
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  font-family: 'Inter', sans-serif;
  font-size: 13px; font-weight: 700;
  color: rgba(51,117,175,0.35);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  z-index: 1;
}

/* 占位图尺寸变体 */
.s2-ph--card {
  aspect-ratio: 16 / 10;
  border-radius: var(--s2-radius) var(--s2-radius) 0 0;
}
.s2-ph--wide {
  aspect-ratio: 21 / 9;
  border-radius: var(--s2-radius);
}
.s2-ph--square {
  aspect-ratio: 1 / 1;
  border-radius: var(--s2-radius);
}

/* =============================================================
   5.  行业卡片网格（核心改造）
============================================================= */
.s2-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--s2-gap);
}
@media (max-width: 1024px) { .s2-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px)  { .s2-grid { grid-template-columns: 1fr; } }

/* ---- 行业卡片 ---- */
.s2-card {
  display: flex; flex-direction: column;
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--s2-radius);
  overflow: hidden;
  text-decoration: none !important;
  color: var(--c-text) !important;
  position: relative;
  transition: var(--s2-transition);
  box-shadow: var(--s2-shadow);
}
.s2-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--s2-shadow-hover);
  border-color: var(--c-primary);
}

/* 图片区 */
.s2-card__media {
  position: relative;
  overflow: hidden;
}
.s2-card__media img,
.s2-card__media .s2-ph {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}
.s2-card:hover .s2-card__media img,
.s2-card:hover .s2-card__media .s2-ph {
  transform: scale(1.08);
}

/* 图片上的行业标签 */
.s2-card__tag {
  position: absolute;
  top: 14px; left: 14px;
  z-index: 2;
  font-family: 'Inter', sans-serif;
  font-size: 11px; font-weight: 800;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: #fff;
  padding: 6px 14px;
  border-radius: 999px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.s2-card__tag--mfg     { background: rgba(51,117,175,.92); }
.s2-card__tag--energy  { background: rgba(106,78,192,.92); }
.s2-card__tag--robot   { background: rgba(78,130,0,.92); }
.s2-card__tag--inst    { background: rgba(91,109,125,.92); }
.s2-card__tag--vehicle { background: rgba(42,116,136,.92); }
.s2-card__tag--clean   { background: rgba(217,102,36,.92); }
.s2-card__tag--power   { background: rgba(184,120,26,.92); }
.s2-card__tag--water   { background: rgba(42,138,138,.92); }
.s2-card__tag--medical { background: rgba(178,42,93,.92); }
.s2-card__tag--trans   { background: rgba(53,70,160,.92); }
.s2-card__tag--emergency { background: rgba(138,48,48,.92); }
.s2-card__tag--construct { background: rgba(90,74,48,.92); }
.s2-card__tag--edu     { background: rgba(90,74,144,.92); }
.s2-card__tag--special { background: rgba(47,48,39,.92); }

/* 悬停遮罩 + 展开信息 */
.s2-card__overlay {
  position: absolute; inset: 0;
  background: linear-gradient(to top,
    rgba(13,31,90,0.92) 0%,
    rgba(13,31,90,0.6) 40%,
    transparent 70%);
  opacity: 0;
  transition: opacity 0.35s ease;
  display: flex; flex-direction: column;
  justify-content: flex-end;
  padding: var(--sp-5);
  z-index: 3;
}
.s2-card:hover .s2-card__overlay {
  opacity: 1;
}

/* 悬停时显示的场景列表 */
.s2-card__scenes-hover {
  list-style: none; padding: 0; margin: 0 0 var(--sp-3);
  transform: translateY(20px);
  opacity: 0;
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1) 0.05s;
}
.s2-card:hover .s2-card__scenes-hover {
  transform: translateY(0);
  opacity: 1;
}
.s2-card__scenes-hover li {
  display: flex; align-items: center; gap: 8px;
  font-size: var(--fs-sm); color: rgba(255,255,255,.9);
  padding: 4px 0;
}
.s2-card__scenes-hover li::before {
  content: "→"; font-size: 11px; color: #ffdb6a;
  font-weight: 700;
}
.s2-card__overlay-more {
  font-size: var(--fs-sm); font-weight: 700;
  color: #ffdb6a;
  transform: translateY(20px);
  opacity: 0;
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1) 0.1s;
}
.s2-card:hover .s2-card__overlay-more {
  transform: translateY(0);
  opacity: 1;
}

/* 卡片底部信息（始终可见） */
.s2-card__body {
  padding: var(--sp-5) var(--sp-5) var(--sp-5);
  display: flex; flex-direction: column;
  flex: 1;
  background: #fff;
  position: relative; z-index: 4;
}
.s2-card__eyebrow {
  font-family: 'Inter', sans-serif;
  font-size: 10px; font-weight: 800;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--c-muted); display: block; margin-bottom: 4px;
}
.s2-card__title {
  font-size: 20px; font-weight: 800;
  color: var(--c-primary); line-height: 1.3; margin: 0 0 var(--sp-2);
}
.s2-card__desc {
  font-size: var(--fs-sm); color: var(--c-text-2);
  line-height: 1.65; margin: 0 0 var(--sp-3);
}
.s2-card__foot {
  display: flex; align-items: center; justify-content: space-between;
  margin-top: auto; padding-top: var(--sp-3);
  border-top: 1px solid var(--c-border);
}
.s2-card__more {
  font-size: var(--fs-sm); font-weight: 700;
  color: var(--c-accent); letter-spacing: 0.02em;
}
.s2-card__cnt {
  font-family: 'Inter', sans-serif; font-size: 11px;
  color: var(--c-muted); font-variant-numeric: tabular-nums;
}

/* =============================================================
   6.  平台映射区（精简为 2×2 大卡片）
============================================================= */
.s2-platforms {
  padding: var(--sp-16) 0;
  background: var(--c-bg-alt);
}
.s2-platform-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--sp-5);
  max-width: 1000px; margin: 0 auto;
}
@media (max-width: 768px) {
  .s2-platform-grid { grid-template-columns: 1fr; }
}

.s2-pcard {
  display: flex; flex-direction: column;
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--s2-radius);
  overflow: hidden;
  text-decoration: none !important;
  color: var(--c-text) !important;
  transition: var(--s2-transition);
  box-shadow: var(--s2-shadow);
}
.s2-pcard:hover {
  transform: translateY(-5px);
  box-shadow: var(--s2-shadow-hover);
  border-color: var(--c-primary);
}
.s2-pcard__media {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
}
.s2-pcard__media img,
.s2-pcard__media .s2-ph {
  width: 100%; height: 100%;
  object-fit: cover; display: block;
}
.s2-pcard__tag {
  position: absolute; top: 14px; left: 14px; z-index: 2;
  font-family: 'Inter', sans-serif; font-size: 11px;
  font-weight: 800; letter-spacing: 0.08em;
  text-transform: uppercase; color: #fff;
  padding: 6px 14px; border-radius: 999px;
}
.s2-pcard__tag--compute { background: rgba(51,117,175,.92); }
.s2-pcard__tag--front   { background: rgba(42,116,136,.92); }
.s2-pcard__tag--clean   { background: rgba(217,102,36,.92); }
.s2-pcard__tag--field   { background: rgba(184,120,26,.92); }

.s2-pcard__body {
  padding: var(--sp-5) var(--sp-6) var(--sp-6);
  flex: 1; display: flex; flex-direction: column;
}
.s2-pcard__head { margin-bottom: var(--sp-3); }
.s2-pcard__name {
  font-family: 'Inter', sans-serif; font-size: 24px;
  font-weight: 800; color: var(--c-primary);
  letter-spacing: -0.02em; line-height: 1.1;
}
.s2-pcard__name sup { font-size: 50%; vertical-align: super; }
.s2-pcard__sub {
  font-size: var(--fs-sm); color: var(--c-muted);
  font-weight: 500; margin-top: 4px; display: block;
}
.s2-pcard p {
  font-size: var(--fs-sm); color: var(--c-text-2);
  line-height: 1.65; margin: 0 0 var(--sp-3);
}
.s2-pcard__list {
  list-style: none; padding: 0; margin: 0 0 var(--sp-3);
  border-top: 1px solid var(--c-border);
}
.s2-pcard__list li {
  font-size: var(--fs-sm); color: var(--c-text);
  padding: 7px 0; border-bottom: 1px solid var(--c-border);
}
.s2-pcard__list li:last-child { border-bottom: 0; }
.s2-pcard__more {
  font-size: var(--fs-sm); font-weight: 700;
  color: var(--c-accent); margin-top: auto;
  transition: letter-spacing var(--t-fast);
}
.s2-pcard:hover .s2-pcard__more { letter-spacing: 0.04em; }

/* =============================================================
   7.  底部 CTA（复用 components.css）
============================================================= */
/* 样式由 components.css 统一接管 */

/* =============================================================
   8.  响应式
============================================================= */
@media (max-width: 1024px) {
  .s2-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .s2-grid { grid-template-columns: 1fr; }
  .s2-card__title { font-size: 18px; }
  .s2-platform-grid { grid-template-columns: 1fr; }
  .s2-hero-stats .container { gap: var(--sp-4); }
  .s2-hero-stat__sep { display: none; }
}