/* =============================================================
   main.css — 布局与组件
   铭风科技官网 | applin.cn
   ============================================================= */

/* =============================================================
   顶部导航
   ============================================================= */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--nav-h);
  border-bottom: 1px solid transparent;
  background: rgba(11, 15, 26, 0.72);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  transition: border-color 0.25s var(--ease), background-color 0.25s var(--ease);
}

.site-header.is-scrolled {
  border-bottom-color: var(--border);
  background: rgba(11, 15, 26, 0.94);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 100%;
}

/* Logo —— 暂无图片，用渐变方块 + 文字 */
.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  flex: none;
}

.brand-logo {
  display: block;
  width: auto;
  height: 44px;
}

.brand-text { display: flex; flex-direction: column; }

.brand-name {
  font-size: 1.0625rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  line-height: 1.3;
}

.brand-sub {
  color: var(--text-mute);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  line-height: 1.4;
}

/* 菜单 */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  display: block;
  padding: 9px 15px;
  border-radius: var(--radius-sm);
  color: var(--text-dim);
  font-size: var(--fs-sm);
  transition: color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.nav-link:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.045);
}

.nav-link[aria-current="page"] {
  color: var(--text);
  background: rgba(59, 130, 246, 0.13);
}

.nav-actions { display: flex; align-items: center; gap: 12px; flex: none; }

/* 汉堡按钮 */
.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
}

.nav-toggle svg { margin: 0 auto; }

/* 汉堡图标 ↔ 关闭图标 切换 */
.nav-toggle .icon-close { display: none; }
.nav-toggle[aria-expanded="true"] .icon-open { display: none; }
.nav-toggle[aria-expanded="true"] .icon-close { display: block; }

@media (max-width: 940px) {
  .brand-logo { height: 36px; }
  .nav-toggle { display: block; }

  .nav-menu {
    position: absolute;
    top: var(--nav-h);
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: 12px 24px 20px;
    border-bottom: 1px solid var(--border);
    background: var(--bg);
  }

  .nav-menu.is-open { display: flex; }

  .nav-link { padding: 13px 14px; font-size: 0.9375rem; }

  .nav-actions .btn--primary { display: none; }
}

/* =============================================================
   首屏 Hero —— 左文右图 + 数据指标
   ============================================================= */

.hero {
  position: relative;
  overflow: hidden;
  padding: 96px 0 88px;
}

/* 背景光斑：两层径向渐变，克制不刺眼 */
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(620px 380px at 78% 8%, rgba(139, 92, 246, 0.18), transparent 70%),
    radial-gradient(520px 340px at 12% 92%, rgba(34, 211, 238, 0.1), transparent 72%);
}

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  gap: 64px;
  align-items: center;
}

.hero h1 { margin-bottom: 22px; }

.hero-lead {
  max-width: 34em;
  margin-bottom: 34px;
  color: var(--text-dim);
  font-size: 1.0625rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 34px;
}

/* 首屏下方的小信任条 */
.hero-trust {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  color: var(--text-mute);
  font-size: var(--fs-sm);
}

.hero-trust li { display: flex; align-items: center; gap: 7px; }

.hero-trust svg { color: var(--accent); flex: none; }

/* 右侧指标卡 */
.stat-panel {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.stat {
  padding: 24px 22px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.stat:nth-child(1) { grid-column: 1 / -1; }

.stat-num {
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.15;
  background: var(--brand-grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.stat-label {
  margin-top: 6px;
  color: var(--text-dim);
  font-size: var(--fs-sm);
}

/* 业务图标矩阵 */
.biz-matrix {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  padding: 18px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.biz-chip {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px 8px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.02);
  color: var(--text-dim);
  font-size: var(--fs-xs);
  text-align: center;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.biz-chip:hover { color: var(--text); border-color: var(--brand-1); }

@media (max-width: 940px) {
  .hero { padding: 64px 0 72px; }
  .hero-grid { grid-template-columns: 1fr; gap: 48px; }
}

@media (max-width: 480px) {
  .biz-matrix { grid-template-columns: repeat(2, 1fr); }
  .stat-panel { grid-template-columns: 1fr; }
  .stat:nth-child(1) { grid-column: auto; }
}

/* =============================================================
   业务卡片网格
   ============================================================= */

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}

@media (max-width: 1000px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
}

/* 业务卡 */
.svc-card h3 { margin-bottom: 10px; }

.svc-card p {
  color: var(--text-dim);
  font-size: var(--fs-sm);
  margin-bottom: 18px;
}

.svc-tags { display: flex; flex-wrap: wrap; gap: 7px; }

.svc-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 18px;
  color: var(--accent);
  font-size: var(--fs-sm);
}

.svc-more svg { transition: transform 0.2s var(--ease); }
.svc-card:hover .svc-more svg { transform: translateX(4px); }

/* =============================================================
   优势列表
   ============================================================= */

.adv-item {
  display: flex;
  gap: 16px;
  padding: 26px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.adv-item .icon-box { margin-bottom: 0; flex: none; }

.adv-item h3 { margin-bottom: 7px; font-size: 1.0625rem; }

.adv-item p { color: var(--text-dim); font-size: var(--fs-sm); }

/* =============================================================
   服务项目页 —— 详情块
   ============================================================= */

.svc-detail {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 48px;
  padding: 46px 0;
  border-bottom: 1px solid var(--border);
}

.svc-detail:last-child { border-bottom: none; }

.svc-detail:target { scroll-margin-top: calc(var(--nav-h) + 24px); }

.svc-detail-head h2 {
  font-size: 1.5rem;
  margin: 18px 0 12px;
}

.svc-detail-head .icon-box { margin-bottom: 0; }

.svc-detail-head p { color: var(--text-dim); font-size: var(--fs-sm); }

.svc-detail-body > p {
  color: var(--text-dim);
  margin-bottom: 26px;
}

.svc-feature-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px 24px;
  margin-bottom: 26px;
}

.svc-feature-list li {
  position: relative;
  padding-left: 24px;
  color: var(--text-dim);
  font-size: var(--fs-sm);
}

.svc-feature-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 7px;
  height: 7px;
  border-radius: 2px;
  background: var(--brand-grad);
}

.svc-scene {
  padding: 18px 20px;
  margin-bottom: 22px;
  border-left: 2px solid var(--brand-1);
  background: rgba(59, 130, 246, 0.06);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.svc-scene dt {
  color: var(--accent);
  font-size: var(--fs-xs);
  letter-spacing: 0.08em;
  margin-bottom: 5px;
}

.svc-scene dd { color: var(--text-dim); font-size: var(--fs-sm); margin: 0; }

/* 服务详情页 · 合作流程步骤 */
.svc-process {
  list-style: none;
  counter-reset: step;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.svc-process li {
  counter-increment: step;
  position: relative;
  display: grid;
  grid-template-columns: 40px 1fr;
  align-items: baseline;
  gap: 14px;
  padding: 14px 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel);
}

.svc-process li::before {
  content: counter(step, decimal-leading-zero);
  font-size: var(--fs-sm);
  font-weight: 700;
  color: transparent;
  background: var(--brand-grad);
  -webkit-background-clip: text;
  background-clip: text;
}

.svc-process li strong { grid-column: 2; font-size: var(--fs-sm); color: var(--text); }

.svc-process li span {
  grid-column: 2;
  color: var(--text-dim);
  font-size: var(--fs-sm);
}

@media (max-width: 560px) {
  .svc-process li { grid-template-columns: 32px 1fr; padding: 12px 14px; }
}

@media (max-width: 860px) {
  .svc-detail { grid-template-columns: 1fr; gap: 26px; padding: 36px 0; }
  .svc-feature-list { grid-template-columns: 1fr; }
}

/* 服务页侧边锚点导航 */
.anchor-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  padding: 18px 0;
  border-bottom: 1px solid var(--border);
}

.anchor-nav a {
  padding: 7px 15px;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--text-dim);
  font-size: var(--fs-xs);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.anchor-nav a:hover { color: var(--text); border-color: var(--brand-1); }

/* =============================================================
   案例展示页
   ============================================================= */

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-bottom: 34px;
}

.filter-btn {
  padding: 9px 19px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--panel);
  color: var(--text-dim);
  font-size: var(--fs-sm);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease),
              background-color 0.2s var(--ease);
}

.filter-btn:hover { color: var(--text); border-color: var(--border-strong); }

.filter-btn[aria-pressed="true"] {
  background: var(--brand-grad);
  border-color: transparent;
  color: #fff;
}

/* 案例卡片 */
.case-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  padding: 0;
}

/* 封面：用渐变占位，不引用图片文件，避免 404 */
.case-cover {
  position: relative;
  display: grid;
  place-items: center;
  height: 168px;
  border-bottom: 1px solid var(--border);
  background:
    radial-gradient(240px 150px at 70% 20%, rgba(139, 92, 246, 0.3), transparent 70%),
    linear-gradient(135deg, #16203a 0%, #101828 100%);
}

.case-cover svg { width: 46px; height: 46px; color: rgba(148, 163, 184, 0.55); }

/* 有配图的封面：图片铺满，图标作加载失败时的兜底 */
.case-cover img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  transition: transform 0.45s var(--ease);
}

.case-card:hover .case-cover img { transform: scale(1.04); }

.case-cover .case-img-flag {
  position: absolute;
  right: 14px;
  bottom: 12px;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: var(--fs-xs);
  color: var(--text-dim);
  background: rgba(11, 15, 26, 0.72);
  border: 1px solid var(--border-strong);
}

/* 图片加载失败时显示兜底图标 */
.case-cover svg { display: none; }
.case-cover.no-img svg { display: block; }

.case-card:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.case-more {
  margin-left: auto;
  color: var(--accent);
  font-size: var(--fs-xs);
  white-space: nowrap;
}

.case-cover .case-cat {
  position: absolute;
  top: 14px;
  left: 14px;
  padding: 4px 12px;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  background: rgba(11, 15, 26, 0.8);
  color: var(--accent);
  font-size: 0.75rem;
}

.case-cover .case-industry {
  position: absolute;
  top: 14px;
  right: 14px;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: var(--fs-xs);
  color: var(--text-mute);
  background: rgba(11, 15, 26, 0.55);
  border: 1px solid var(--border);
}

.case-body { padding: 24px; flex: 1; display: flex; flex-direction: column; }

.case-body h3 { margin-bottom: 9px; font-size: 1.0625rem; }

.case-body p {
  flex: 1;
  color: var(--text-dim);
  font-size: var(--fs-sm);
  margin-bottom: 18px;
}

.case-result {
  flex: 0 0 auto;
  margin: -8px 0 18px;
  padding: 10px 14px;
  border-left: 2px solid var(--accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: rgba(34, 211, 238, 0.06);
  color: var(--text);
  font-size: var(--fs-sm);
  line-height: 1.6;
}

.case-result::before {
  content: '成果 · ';
  color: var(--accent);
  font-weight: 600;
}

.case-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.case-card.is-hidden { display: none; }

.filter-empty {
  padding: 60px 0;
  color: var(--text-mute);
  text-align: center;
}

/* =============================================================
   关于我们
   ============================================================= */

.about-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: start;
}

@media (max-width: 900px) {
  .about-grid { grid-template-columns: 1fr; gap: 36px; }
}

.info-list { display: grid; gap: 18px; }

.info-list div {
  padding: 20px 22px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.info-list dt {
  color: var(--text-mute);
  font-size: var(--fs-xs);
  letter-spacing: 0.06em;
  margin-bottom: 4px;
}

.info-list dd { margin: 0; font-size: var(--fs-body); }

/* 服务流程时间线 */
.steps { display: grid; gap: 0; counter-reset: step; }

.step {
  position: relative;
  display: grid;
  grid-template-columns: 54px 1fr;
  gap: 22px;
  padding-bottom: 34px;
}

.step:last-child { padding-bottom: 0; }

.step::before {
  content: "";
  position: absolute;
  left: 26px;
  top: 54px;
  bottom: 0;
  width: 1px;
  background: var(--border);
}

.step:last-child::before { display: none; }

.step-num {
  display: grid;
  place-items: center;
  width: 54px;
  height: 54px;
  border: 1px solid var(--border-strong);
  border-radius: 50%;
  background: var(--panel);
  color: var(--accent);
  font-size: 1.0625rem;
  font-weight: 600;
}

.step-body { padding-top: 8px; }

.step-body h3 { margin-bottom: 7px; font-size: 1.0625rem; }

.step-body p { color: var(--text-dim); font-size: var(--fs-sm); }

@media (max-width: 520px) {
  .step { grid-template-columns: 44px 1fr; gap: 16px; }
  .step-num { width: 44px; height: 44px; font-size: 0.9375rem; }
  .step::before { left: 21.5px; top: 44px; }
}

/* =============================================================
   联系我们
   ============================================================= */

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 48px;
  align-items: start;
}

@media (max-width: 900px) {
  .contact-grid { grid-template-columns: 1fr; gap: 36px; }
}

.contact-list { display: grid; gap: 16px; }

.contact-item {
  display: flex;
  gap: 17px;
  padding: 24px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: border-color 0.25s var(--ease);
}

.contact-item:hover { border-color: var(--border-strong); }

.contact-item .icon-box { margin-bottom: 0; flex: none; }

.contact-item dt {
  color: var(--text-mute);
  font-size: var(--fs-xs);
  letter-spacing: 0.06em;
  margin-bottom: 5px;
}

.contact-item dd { margin: 0; }

.contact-item a { font-size: 1.0625rem; font-weight: 500; }

.contact-item a:hover { color: var(--accent); }

.contact-item .note {
  display: block;
  margin-top: 4px;
  color: var(--text-mute);
  font-size: var(--fs-xs);
}

/* 二维码卡 */
.qr-card {
  padding: 30px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  text-align: center;
}

.qr-card h3 { margin-bottom: 8px; }

.qr-card > p {
  color: var(--text-dim);
  font-size: var(--fs-sm);
  margin-bottom: 22px;
}

.qr-slot {
  display: grid;
  place-items: center;
  gap: 12px;
  width: 100%;
  max-width: 260px;
  margin: 0 auto;
}

.qr-slot img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  background: #fff;
  padding: 8px;
}

.qr-id { margin: 0; font-size: var(--fs-sm); color: var(--text); }
.qr-id strong { color: var(--accent); letter-spacing: 0.02em; }

.qr-slot > span {
  color: var(--text-mute);
  font-size: var(--fs-xs);
  text-align: center;
}

/* 主页底部 CTA 联系方式 */
.cta-contacts {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px 36px;
  margin: 26px 0 6px;
}

.cta-contact {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.cta-label {
  color: var(--text-mute);
  font-size: var(--fs-sm);
}

.cta-contact a,
.cta-wechat {
  color: var(--text);
  font-size: 1.0625rem;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.cta-contact a:hover { color: var(--accent); }

/* 地图占位 */
.map-slot {
  display: grid;
  place-items: center;
  min-height: 300px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(420px 240px at 50% 50%, rgba(59, 130, 246, 0.1), transparent 72%),
    var(--panel);
  color: var(--text-mute);
  text-align: center;
  padding: 40px 24px;
}

.map-slot strong { display: block; color: var(--text); margin-bottom: 8px; }

/* =============================================================
   底部 CTA 条
   ============================================================= */

.cta-band {
  position: relative;
  overflow: hidden;
  padding: 64px 56px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(460px 260px at 82% 20%, rgba(139, 92, 246, 0.22), transparent 70%),
    radial-gradient(400px 240px at 8% 90%, rgba(34, 211, 238, 0.12), transparent 72%),
    var(--panel);
  text-align: center;
}

.cta-band h2 { margin-bottom: 14px; }

.cta-band p {
  max-width: 46em;
  margin: 0 auto 30px;
  color: var(--text-dim);
}

.cta-band .hero-actions { justify-content: center; margin-bottom: 0; }

@media (max-width: 640px) {
  .cta-band { padding: 44px 24px; }
}

/* =============================================================
   页脚
   ============================================================= */

.site-footer {
  margin-top: 88px;
  padding: 64px 0 30px;
  border-top: 1px solid var(--border);
  background: var(--bg-soft);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 44px;
}

@media (max-width: 900px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}

@media (max-width: 560px) {
  .footer-grid { grid-template-columns: 1fr; }
}

.footer-brand p {
  margin: 18px 0 0;
  max-width: 30em;
  color: var(--text-mute);
  font-size: var(--fs-sm);
}

.footer-col h4 {
  margin: 0 0 16px;
  color: var(--text);
  font-size: var(--fs-sm);
  font-weight: 600;
  letter-spacing: 0.02em;
}

.footer-col li { margin-bottom: 10px; }

.footer-col a,
.footer-col span {
  color: var(--text-mute);
  font-size: var(--fs-sm);
}

.footer-col a:hover { color: var(--accent); }

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  align-items: center;
  justify-content: space-between;
  padding-top: 26px;
  border-top: 1px solid var(--border);
  color: var(--text-mute);
  font-size: var(--fs-xs);
}

.footer-bottom a:hover { color: var(--accent); }

/* =============================================================
   页面内页头部（非首页用）
   ============================================================= */

.page-head {
  position: relative;
  overflow: hidden;
  padding: 72px 0 56px;
  border-bottom: 1px solid var(--border);
}

.page-head::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(560px 320px at 20% 0%, rgba(139, 92, 246, 0.16), transparent 70%);
}

.page-head .container { position: relative; }

.page-head h1 {
  font-size: clamp(1.75rem, 1.2rem + 2vw, 2.75rem);
  margin-bottom: 16px;
}

.page-head p {
  max-width: 46em;
  color: var(--text-dim);
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 18px;
  color: var(--text-mute);
  font-size: var(--fs-xs);
}

.breadcrumb a:hover { color: var(--accent); }

/* =============================================================
   提示条（用于占位内容提醒，上线前删除）
   ============================================================= */

.notice-bar {
  padding: 12px 20px;
  border: 1px solid rgba(250, 204, 21, 0.3);
  border-radius: var(--radius);
  background: rgba(250, 204, 21, 0.07);
  color: #FDE68A;
  font-size: var(--fs-sm);
}

/* =============================================================
   案例详情页（case-detail.html）
   ============================================================= */

.detail-head h1 { margin-bottom: 10px; }

.detail-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 6px;
  color: var(--text-mute);
  font-size: var(--fs-sm);
}

.detail-meta .case-cat {
  position: static;
  padding: 4px 12px;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  color: var(--text-dim);
  font-size: var(--fs-xs);
}

.detail-cover {
  position: relative;
  margin: 28px 0 8px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.detail-cover img { display: block; width: 100%; height: auto; }

/* 竖版长图（手机端截图类）：桌面端限宽居中，避免铺满整个页面 */
.detail-cover.is-portrait {
  max-width: 420px;
  margin-left: auto;
  margin-right: auto;
}

.detail-cover .case-img-flag {
  position: absolute;
  right: 14px;
  bottom: 12px;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: var(--fs-xs);
  color: var(--text-dim);
  background: rgba(11, 15, 26, 0.72);
  border: 1px solid var(--border-strong);
}

.detail-figure-note {
  margin: 0 0 8px;
  color: var(--text-mute);
  font-size: var(--fs-xs);
}

.detail-blocks { margin-top: 34px; display: grid; gap: 26px; }

.detail-block {
  padding: 26px 28px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel);
}

.detail-block h2 {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
  font-size: 1.125rem;
}

.detail-block h2::before {
  content: '';
  width: 4px;
  height: 18px;
  border-radius: 2px;
  background: var(--brand-grad);
}

.detail-block p { color: var(--text-dim); line-height: 1.8; }

.detail-block--result p {
  color: var(--text);
  font-size: 1.0625rem;
}

.detail-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 30px;
}

.detail-nav {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.detail-nav a {
  color: var(--text-dim);
  font-size: var(--fs-sm);
  text-decoration: none;
  transition: color 0.2s var(--ease);
}

.detail-nav a:hover { color: var(--accent); }

@media (max-width: 640px) {
  .detail-nav { flex-direction: column; gap: 10px; }
  .detail-cover { margin-top: 20px; }
  .detail-cover.is-portrait { max-width: 320px; }
  .detail-blocks { margin-top: 22px; gap: 16px; }
  .detail-block { padding: 20px 18px; }
  .detail-block h2 { font-size: 1rem; }
  .detail-tags { margin-top: 22px; }
}

/* =============================================================
   移动端整体优化（≤640 / ≤480）
   目标：内容更宽、横向元素排列更整齐、减少零碎折行
   ============================================================= */
@media (max-width: 640px) {
  /* 容器两侧留白收窄，正文可用宽度 +12px */
  .container { padding: 0 18px; }

  /* 纵向节奏整体收紧 */
  .section { padding: 62px 0; }
  .section-head { margin-bottom: 34px; }

  /* 卡片内边距收紧，文字不再被挤窄 */
  .card { padding: 20px 18px; }
  .case-body { padding: 18px 16px; }

  /* 首屏：按钮改为通栏，避免两个按钮挤在一行显得局促 */
  .hero { padding: 52px 0 60px; }
  .hero-actions { flex-direction: column; align-items: stretch; gap: 10px; }
  .hero-actions .btn { justify-content: center; }

  /* 底部 CTA：电话/邮箱/微信号改为整齐的纵向居中排列 */
  .cta-band { padding: 38px 22px; }
  .cta-contacts { flex-direction: column; gap: 14px; margin: 24px 0 6px; }
  .cta-contact { flex-direction: column; align-items: center; gap: 1px; }

  /* 页脚：品牌块占满一行，三个导航列改两列排布，页脚不再拖长 */
  .footer-grid { grid-template-columns: repeat(2, 1fr); gap: 26px 16px; }
  .footer-brand { grid-column: 1 / -1; }
  .footer-brand p { font-size: var(--fs-sm); }

  /* 关于页信息卡：改为「标签 + 内容」行式布局，紧凑整齐 */
  .info-list { gap: 8px; }
  .info-list div { display: flex; align-items: baseline; gap: 12px; padding: 12px 14px; }
  .info-list dt { margin: 0; flex: none; }
  .info-list dd { font-size: var(--fs-sm); }

  /* 案例筛选条 */
  .filter-bar { gap: 7px; margin-bottom: 26px; }

  /* 详情页封面 */
  .detail-cover.is-portrait { max-width: 300px; }
}

@media (max-width: 480px) {
  .biz-matrix { grid-template-columns: repeat(2, 1fr); }

  /* 首屏数据面板：标题卡占满一行，两个数字并排，不再各自一整行 */
  .stat-panel { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .stat:nth-child(1) { grid-column: 1 / -1; }
}