/* =====================================================================
   同立信息 TONGLI — 子页面与扩展组件
   依赖 styles.css 的 Design Token
   ===================================================================== */

/* 全局盒模型修正（styles.css 未设置，避免宽度 100% + padding 横向溢出） */
*,
*::before,
*::after { box-sizing: border-box; }

html, body { overflow-x: hidden; }

/* ----------------------------- 导航当前态 ----------------------------- */
.nav a.active {
  color: var(--text);
  background: rgba(47,128,255, 0.14);
}
.nav a.active::after { width: 38%; }

/* ----------------------------- 子页头图 ----------------------------- */
.page-hero {
  position: relative;
  padding: 180px 0 90px;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}
.page-hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.page-hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.26;
}
.page-hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(6,5,26,0.5), var(--bg-0) 98%),
    linear-gradient(90deg, rgba(6,5,26,0.9), transparent 60%);
}
.page-hero .container { position: relative; z-index: 1; }
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-size: 0.84rem;
  color: var(--text-mute);
}
.breadcrumb a { color: var(--text-dim); transition: color 0.3s; }
.breadcrumb a:hover { color: var(--violet-2); }
.breadcrumb .sep { opacity: 0.5; }
.breadcrumb .current { color: var(--violet-2); }
.page-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin-top: 20px;
}
.page-title .grad {
  background: linear-gradient(110deg, #4d8bff, #2f80ff, #22d3ee, #38bdf8, #2f80ff);
  background-size: 250% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: gradShimmer 8s linear infinite;
}
.page-lead {
  margin-top: 20px;
  max-width: 75ch;
  color: var(--text-dim);
  font-size: clamp(1rem, 1.3vw, 1.12rem);
  line-height: 1.8;
}
.page-hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; }

/* 通用区块标题居中型 */
.section-head.center {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  margin-inline: auto;
}
.section-head.center .section-lead { margin-inline: auto; }
.section-head.center .eyebrow::before { display: none; }

/* ----------------------------- 关于页 ----------------------------- */
.intro-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(36px, 5vw, 80px);
  align-items: center;
}
.intro-visual {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4/2.3;
  border: 1px solid var(--line);
}
.intro-visual img { width: 100%; height: 100%; object-fit: cover; }
.intro-visual::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 45%, rgba(6,5,26,0.75));
}
.intro-visual .floating-badge {
  position: absolute;
  z-index: 2;
  padding: 14px 20px;
  background: rgba(10,8,34,0.72);
  backdrop-filter: blur(14px);
  border: 1px solid var(--line-bright);
  border-radius: 14px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.intro-visual .floating-badge.b1 { left: 22px; bottom: 22px; }
.intro-visual .floating-badge.b2 { right: 22px; top: 22px; }
.intro-visual .floating-badge .ic {
  width: 38px; height: 38px;
  border-radius: 10px;
  background: var(--grad-brand-soft);
  color: var(--violet-2);
  display: grid; place-items: center;
  flex-shrink: 0;
}
.intro-visual .floating-badge .ic svg { width: 19px; height: 19px; }
.intro-visual .floating-badge b { font-family: var(--font-display); font-size: 0.92rem; display: block; }
.intro-visual .floating-badge span { font-size: 0.76rem; color: var(--text-mute); }

.value-list { display: flex; flex-direction: column; gap: 14px; margin-top: 28px; }
.value-item {
  display: flex;
  gap: 16px;
  padding: 20px 22px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--line);
  transition: border-color 0.4s var(--ease), transform 0.4s var(--ease);
}
.value-item:hover { border-color: var(--line-bright); transform: translateX(6px); }
.value-item .ic {
  width: 44px; height: 44px;
  flex-shrink: 0;
  border-radius: 12px;
  background: var(--grad-brand-soft);
  border: 1px solid var(--line-bright);
  color: var(--violet-2);
  display: grid; place-items: center;
}
.value-item .ic svg { width: 22px; height: 22px; }
.value-item h4 { font-family: var(--font-display); font-size: 1.05rem; font-weight: 600; }
.value-item p { margin-top: 6px; color: var(--text-dim); font-size: 0.9rem; line-height: 1.65; }

/* 发展历程时间线 */
.timeline {
  position: relative;
  margin-top: 64px;
  display: flex;
  flex-direction: column;
  gap: 0;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 19px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--violet), var(--azure), transparent);
}
.tl-item {
  position: relative;
  padding: 0 0 40px 64px;
}
.tl-item:last-child { padding-bottom: 0; }
.tl-node {
  position: absolute;
  left: 0;
  top: 2px;
  width: 40px; height: 40px;
  border-radius: 50%;
  background: var(--bg-1);
  border: 1px solid var(--line-bright);
  display: grid;
  place-items: center;
  color: var(--violet-2);
  z-index: 1;
}
.tl-node svg { width: 18px; height: 18px; }
.tl-item.is-key .tl-node {
  background: var(--grad-brand);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 0 24px rgba(47,128,255,0.5);
}
.tl-card {
  padding: 24px 28px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--line);
  transition: border-color 0.4s var(--ease);
}
.tl-card:hover { border-color: var(--line-bright); }
.tl-year {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.3rem;
  background: var(--grad-brand);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.tl-year .undated {
  -webkit-text-fill-color: var(--text-mute);
  color: var(--text-mute);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.1em;
}
.tl-card h4 { font-family: var(--font-display); font-size: 1.08rem; font-weight: 600; margin-top: 10px; }
.tl-card p { margin-top: 8px; color: var(--text-dim); font-size: 0.92rem; line-height: 1.7; }

/* 愿景带 */
.vision-band {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line-bright);
  padding: clamp(40px, 6vw, 72px);
  background:
    radial-gradient(700px 300px at 85% 0%, rgba(47,128,255,0.22), transparent 60%),
    var(--surface);
}
.vision-band .quote {
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 2.6vw, 2rem);
  font-weight: 600;
  line-height: 1.5;
  max-width: 36ch;
}
.vision-band .quote .grad {
  background: linear-gradient(110deg, #4d8bff, #22d3ee, #38bdf8);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.vision-band p { margin-top: 20px; color: var(--text-dim); max-width: 60ch; line-height: 1.8; }

/* ----------------------------- 解决方案页 ----------------------------- */
.sol-detail {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: clamp(36px, 5vw, 72px);
  align-items: center;
  padding-block: clamp(56px, 8vw, 100px);
  border-bottom: 1px solid var(--line);
}
.sol-detail:last-of-type { border-bottom: none; }
.sol-detail.reverse .sol-detail-visual { order: -1; }
.sol-detail-index {
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--violet-2);
  display: inline-flex;
  align-items: center;
  gap: 12px;
}
.sol-detail-index::before {
  content: '';
  width: 32px; height: 1px;
  background: var(--grad-brand);
}
.sol-detail h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.7rem, 3vw, 2.4rem);
  line-height: 1.15;
  margin-top: 18px;
  letter-spacing: -0.01em;
}
.sol-detail h3 .sub { display: block; font-size: 1rem; font-weight: 500; color: var(--violet-2); margin-top: 8px; letter-spacing: 0; }
.sol-detail-desc { margin-top: 20px; color: var(--text-dim); line-height: 1.85; }
.cap-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 28px;
}
.cap-item {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 16px 18px;
  border-radius: 14px;
  background: var(--surface);
  border: 1px solid var(--line);
  font-size: 0.9rem;
  color: var(--text-dim);
  transition: border-color 0.3s, transform 0.3s var(--ease);
}
.cap-item:hover { border-color: var(--line-bright); transform: translateY(-3px); }
.cap-item .check {
  flex-shrink: 0;
  width: 20px; height: 20px;
  border-radius: 50%;
  background: var(--grad-brand-soft);
  color: var(--violet-2);
  display: grid; place-items: center;
  margin-top: 1px;
}
.cap-item .check svg { width: 11px; height: 11px; }
.cap-item b { color: var(--text); font-weight: 600; }

.sol-detail-visual {
  position: relative;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background:
    radial-gradient(500px 300px at 30% 20%, rgba(47,128,255,0.18), transparent 60%),
    linear-gradient(160deg, var(--bg-2), var(--bg-1));
  padding: clamp(28px, 4vw, 48px);
  display: flex;
  flex-direction: column;
  gap: 14px;
  overflow: hidden;
}
.sol-detail-visual::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(96,165,250,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(96,165,250,0.05) 1px, transparent 1px);
  background-size: 44px 44px;
  pointer-events: none;
}
.visual-title {
  position: relative;
  font-family: var(--font-display);
  font-size: 0.8rem;
  letter-spacing: 0.18em;
  color: var(--text-mute);
  text-transform: uppercase;
}
.visual-row {
  position: relative;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 20px;
  border-radius: 14px;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--line);
}
.visual-row .ic {
  width: 42px; height: 42px;
  flex-shrink: 0;
  border-radius: 12px;
  background: var(--grad-brand);
  display: grid; place-items: center;
  color: #fff;
  box-shadow: 0 8px 24px -8px rgba(47,128,255,0.7);
}
.visual-row .ic svg { width: 20px; height: 20px; }
.visual-row b { font-family: var(--font-display); font-size: 0.95rem; display: block; }
.visual-row span { font-size: 0.8rem; color: var(--text-mute); margin-top: 2px; display: block; }

.related-chips { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 26px; }
.related-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  border-radius: 100px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.02);
  font-size: 0.84rem;
  color: var(--text-dim);
  transition: all 0.3s var(--ease);
}
.related-chip svg { width: 13px; height: 13px; transition: transform 0.3s; }
.related-chip:hover {
  border-color: var(--line-bright);
  color: var(--text);
  background: rgba(47,128,255,0.1);
}
.related-chip:hover svg { transform: translateX(3px); }

/* ----------------------------- 案例页 ----------------------------- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 48px;
}
.pill {
  padding: 10px 20px;
  border-radius: 100px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.02);
  color: var(--text-dim);
  font-size: 0.88rem;
  font-family: var(--font-body);
  transition: all 0.3s var(--ease);
}
.pill:hover { border-color: var(--line-bright); color: var(--text); }
.pill.active {
  background: var(--grad-brand);
  border-color: transparent;
  color: #fff;
  box-shadow: 0 8px 24px -8px rgba(47,128,255,0.7);
}
.pill .count {
  margin-left: 7px;
  font-size: 0.78rem;
  opacity: 0.7;
}

.case-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
  margin-top: 40px;
}
.case-card {
  display: flex;
  flex-direction: row;
  align-items: stretch;
  border-radius: var(--radius-lg);
  background: var(--surface-solid);
  border: 1px solid var(--line);
  overflow: hidden;
  transition: transform 0.5s var(--ease), border-color 0.5s var(--ease), box-shadow 0.5s var(--ease), opacity 0.4s;
}
.case-card:hover { transform: translateY(-6px); border-color: var(--line-bright); box-shadow: 0 24px 50px -20px rgba(30,99,224,0.5); }
.case-card.filtered-out { display: none; }
.case-top {
  position: relative;
  width: 260px;
  flex-shrink: 0;
  padding: 26px;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
}
.case-top::before { content: ''; position: absolute; inset: 0; background: var(--grad-brand); opacity: 0.85; }
.case-top::after {
  content: '';
  position: absolute; inset: 0;
  background-image:
    radial-gradient(circle at 18% 28%, rgba(255,255,255,0.2), transparent 42%),
    radial-gradient(circle at 82% 72%, rgba(255,255,255,0.12), transparent 42%);
}
.case-top .cat {
  position: absolute;
  top: 16px; left: 16px;
  z-index: 2;
  padding: 5px 12px;
  border-radius: 100px;
  background: rgba(0,0,0,0.28);
  border: 1px solid rgba(255,255,255,0.25);
  font-size: 0.72rem;
  color: #fff;
}
.case-top .idx {
  position: relative;
  z-index: 1;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 3.8rem;
  line-height: 1;
  color: rgba(255,255,255,0.28);
}
.case-body { padding: 30px 34px; display: flex; flex-direction: column; flex: 1; }
.case-body h3 { font-family: var(--font-display); font-weight: 600; font-size: 1.35rem; line-height: 1.35; }
.case-body .brief { margin-top: 12px; color: var(--text-dim); font-size: 0.92rem; line-height: 1.7; flex: 1; }
.case-toggle {
  margin-top: 18px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--violet-2);
  padding: 0;
  background: none;
  border: none;
  cursor: pointer;
  align-self: flex-start;
}
.case-toggle svg { width: 14px; height: 14px; transition: transform 0.35s var(--ease); }
.case-card.open .case-toggle svg { transform: rotate(180deg); }
.case-more {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.5s var(--ease);
}
.case-card.open .case-more { max-height: 900px; }
.case-more-inner {
  padding-top: 20px;
  margin-top: 18px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.case-feature h4 {
  display: flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
}
.case-feature h4 .dot {
  width: 7px; height: 7px;
  border-radius: 2px;
  background: var(--grad-brand);
  flex-shrink: 0;
}
.case-feature p { margin-top: 7px; padding-left: 16px; color: var(--text-dim); font-size: 0.84rem; line-height: 1.65; }
.case-highlight {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.case-highlight span {
  padding: 6px 13px;
  border-radius: 100px;
  font-size: 0.76rem;
  color: var(--violet-2);
  background: var(--grad-brand-soft);
  border: 1px solid var(--line-bright);
}
.case-empty {
  display: none;
  margin-top: 40px;
  padding: 60px;
  text-align: center;
  color: var(--text-mute);
  border: 1px dashed var(--line-bright);
  border-radius: var(--radius-lg);
}
.case-empty.show { display: block; }

/* ----------------------------- 服务流程 ----------------------------- */
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 56px;
}
.process-step {
  position: relative;
  padding: 30px 26px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--line);
}
.process-step::after {
  content: '';
  position: absolute;
  top: 50%;
  right: -20px;
  width: 20px;
  height: 1px;
  background: var(--line-bright);
}
.process-step:last-child::after { display: none; }
.process-step .n {
  font-family: var(--font-display);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  color: var(--violet-2);
  font-weight: 600;
}
.process-step h4 { font-family: var(--font-display); font-size: 1.08rem; font-weight: 600; margin-top: 14px; }
.process-step p { margin-top: 10px; color: var(--text-dim); font-size: 0.86rem; line-height: 1.6; }

/* ----------------------------- 联系页 ----------------------------- */
.contact-grid {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: clamp(36px, 5vw, 72px);
  align-items: start;
}
.contact-cards { display: flex; flex-direction: column; gap: 16px; }
.contact-card {
  display: flex;
  gap: 18px;
  padding: 26px 28px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--line);
  transition: border-color 0.4s var(--ease), transform 0.4s var(--ease);
}
.contact-card:hover { border-color: var(--line-bright); transform: translateX(6px); }
.contact-card .ic {
  width: 50px; height: 50px;
  flex-shrink: 0;
  border-radius: 14px;
  background: var(--grad-brand-soft);
  border: 1px solid var(--line-bright);
  color: var(--violet-2);
  display: grid; place-items: center;
}
.contact-card .ic svg { width: 23px; height: 23px; }
.contact-card h4 { font-family: var(--font-display); font-size: 1.05rem; font-weight: 600; }
.contact-card p { margin-top: 8px; color: var(--text-dim); font-size: 0.9rem; line-height: 1.65; }
.contact-card .tagline { color: var(--violet-2); font-size: 0.82rem; margin-top: 6px; }

.form-panel {
  padding: clamp(28px, 4vw, 44px);
  border-radius: var(--radius-lg);
  background: var(--surface);
  border: 1px solid var(--line-bright);
  backdrop-filter: blur(14px);
}
.form-panel h3 { font-family: var(--font-display); font-size: 1.4rem; font-weight: 700; }
.form-panel .sub { margin-top: 8px; color: var(--text-mute); font-size: 0.9rem; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 26px; }
.f-field { display: flex; flex-direction: column; gap: 8px; }
.f-field.full { grid-column: 1 / -1; }
.f-field label {
  font-family: var(--font-display);
  font-size: 0.82rem;
  color: var(--text-dim);
  letter-spacing: 0.04em;
}
.f-field label .req { color: #ff7c9c; margin-left: 3px; }
.f-field input,
.f-field textarea,
.f-field select {
  width: 100%;
  padding: 13px 16px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--line);
  border-radius: 12px;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.92rem;
  transition: border-color 0.3s, background 0.3s;
}
.f-field select option { background: var(--surface-solid); color: var(--text); }
.f-field input:focus,
.f-field textarea:focus,
.f-field select:focus {
  outline: none;
  border-color: var(--violet-2);
  background: rgba(47,128,255,0.08);
}
.f-field.has-error input,
.f-field.has-error textarea {
  border-color: #ff5c7c;
  background: rgba(255,92,124,0.06);
}
.f-error {
  font-size: 0.78rem;
  color: #ff8aa0;
  display: none;
}
.f-field.has-error .f-error { display: block; }
.f-field textarea { resize: vertical; min-height: 110px; }
.form-submit { width: 100%; justify-content: center; margin-top: 26px; }
.form-status {
  display: none;
  margin-top: 18px;
  padding: 14px 18px;
  border-radius: 12px;
  font-size: 0.88rem;
  line-height: 1.6;
}
.form-status.ok {
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(56,189,248,0.1);
  border: 1px solid rgba(56,189,248,0.4);
  color: #a5e8ff;
}
.form-status.ok svg { width: 18px; height: 18px; flex-shrink: 0; }

/* FAQ */
.faq-list { display: flex; flex-direction: column; gap: 14px; margin-top: 56px; }
.faq-item {
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--line);
  overflow: hidden;
}
.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 22px 26px;
  text-align: left;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  background: none;
  border: none;
  cursor: pointer;
}
.faq-q .ic {
  flex-shrink: 0;
  width: 28px; height: 28px;
  border-radius: 50%;
  border: 1px solid var(--line-bright);
  display: grid; place-items: center;
  color: var(--violet-2);
  transition: transform 0.4s var(--ease), background 0.3s;
}
.faq-q .ic svg { width: 13px; height: 13px; transition: transform 0.4s var(--ease); }
.faq-item.open .faq-q .ic { background: var(--grad-brand); color: #fff; border-color: transparent; }
.faq-item.open .faq-q .ic svg { transform: rotate(180deg); }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.45s var(--ease);
}
.faq-item.open .faq-a { max-height: 400px; }
.faq-a p { padding: 0 26px 24px; color: var(--text-dim); font-size: 0.92rem; line-height: 1.8; }

/* ----------------------------- 首页补充 ----------------------------- */
.home-quick {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 56px;
}
.quick-card {
  padding: 28px 24px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: transform 0.4s var(--ease), border-color 0.4s var(--ease);
}
.quick-card:hover { transform: translateY(-5px); border-color: var(--line-bright); }
.quick-card .ic {
  width: 46px; height: 46px;
  border-radius: 13px;
  background: var(--grad-brand-soft);
  border: 1px solid var(--line-bright);
  color: var(--violet-2);
  display: grid; place-items: center;
}
.quick-card .ic svg { width: 22px; height: 22px; }
.quick-card h4 { font-family: var(--font-display); font-weight: 600; font-size: 1rem; }
.quick-card p { color: var(--text-dim); font-size: 0.85rem; line-height: 1.6; }

.section-more { display: flex; justify-content: center; margin-top: 48px; }

/* ----------------------------- 响应式 ----------------------------- */
@media (max-width: 1024px) {
  .intro-grid,
  .sol-detail,
  .contact-grid { grid-template-columns: 1fr; }
  .sol-detail.reverse .sol-detail-visual { order: 0; }
  .case-grid { grid-template-columns: 1fr; }
  .case-top { width: 220px; }
  .process-grid { grid-template-columns: repeat(2, 1fr); }
  .process-step::after { display: none; }
  .home-quick { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 720px) {
  .page-hero { padding: 140px 0 60px; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { justify-content: center; }
  .hero-meta { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px 16px; }
  .hero-meta .item .k { font-size: 1.5rem; }
  .section-head .section-title { font-size: clamp(1.7rem, 8vw, 2.2rem); }
  .cta-inner { padding: 32px 24px; }
  .case-grid { grid-template-columns: 1fr; }
  .case-card { flex-direction: column; }
  .case-top { width: 100%; min-height: 120px; padding: 20px 24px; }
  .case-top .idx { font-size: 2.6rem; }
  .case-body { padding: 24px 26px; }
  .cap-list { grid-template-columns: 1fr; }
  .process-grid { grid-template-columns: 1fr; }
  .home-quick { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .timeline::before { left: 15px; }
  .tl-item { padding-left: 52px; }
  .tl-node { width: 32px; height: 32px; }
  .tl-node svg { width: 15px; height: 15px; }
}