/* 探龙科技官网 · 样式表 v2 */

:root {
  --brand: #1652f0;
  --brand-dark: #0f3fbf;
  --brand-deep: #0a2a80;
  --brand-soft: #eef3ff;
  --ink: #0b1b33;
  --text: #22314a;
  --muted: #5b6b84;
  --line: #e4e9f2;
  --line-soft: #eef1f7;
  --bg: #ffffff;
  --bg-soft: #f6f8fc;
  --navy: #0b1b33;
  --radius: 12px;
  --radius-lg: 18px;
  --shadow-sm: 0 1px 2px rgba(11, 27, 51, 0.06);
  --shadow: 0 16px 40px rgba(11, 27, 51, 0.08);
  --shadow-lg: 0 28px 70px rgba(11, 27, 51, 0.14);
  --max: 1200px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei",
    "PingFang SC", "Hiragino Sans GB", sans-serif;
  font-size: 16px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: var(--brand);
  text-decoration: none;
}

a:hover {
  color: var(--brand-dark);
}

h1,
h2,
h3,
h4 {
  margin: 0 0 14px;
  color: var(--ink);
  line-height: 1.32;
  font-weight: 700;
}

p {
  margin: 0 0 14px;
}

ul,
ol {
  margin: 0 0 14px;
  padding-left: 1.2em;
}

.container {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

.skip-link {
  position: absolute;
  left: -9999px;
}

.skip-link:focus {
  left: 16px;
  top: 10px;
  z-index: 99;
  background: #fff;
  padding: 8px 14px;
  border-radius: 8px;
}

svg {
  display: block;
}

/* ---------- 顶部信息条 ---------- */

.topbar {
  background: var(--navy);
  color: rgba(255, 255, 255, 0.72);
  font-size: 13px;
  line-height: 36px;
}

.topbar .container {
  display: flex;
  justify-content: space-between;
  gap: 18px;
}

.topbar a,
.topbar span {
  color: rgba(255, 255, 255, 0.72);
}

.topbar a:hover {
  color: #fff;
}

.topbar-left {
  display: flex;
  gap: 22px;
  flex-wrap: wrap;
}

/* ---------- 头部 ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line-soft);
  transition: box-shadow 0.2s ease;
}

.site-header.scrolled {
  box-shadow: 0 6px 24px rgba(11, 27, 51, 0.07);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 11px;
  color: var(--ink);
  font-size: 19px;
  font-weight: 700;
}

.logo:hover {
  color: var(--ink);
}

.logo-mark {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, #2f74ff, #1652f0);
  color: #fff;
  display: grid;
  place-items: center;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.logo-text small {
  display: block;
  font-size: 10.5px;
  font-weight: 400;
  letter-spacing: 0.18em;
  color: #93a2b8;
  line-height: 1.2;
}

.nav {
  display: flex;
  align-items: center;
  gap: 22px;
}

.nav a {
  color: var(--text);
  font-size: 15.5px;
  padding: 6px 0;
  position: relative;
}

.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: -2px;
  height: 2px;
  background: var(--brand);
  transition: right 0.22s ease;
}

.nav a:hover::after,
.nav a.active::after {
  right: 0;
}

.nav a.active {
  color: var(--brand);
  font-weight: 600;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.header-tel {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
}

.nav-toggle {
  display: none;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 8px;
  padding: 8px 14px;
  font-size: 14px;
  color: var(--text);
  cursor: pointer;
}

/* ---------- 按钮 ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: background 0.18s ease, color 0.18s ease, box-shadow 0.18s ease,
    transform 0.18s ease;
}

.btn-primary {
  background: var(--brand);
  color: #fff;
}

.btn-primary:hover {
  background: var(--brand-dark);
  color: #fff;
  box-shadow: 0 12px 26px rgba(22, 82, 240, 0.24);
}

.btn-ghost {
  background: #fff;
  border-color: var(--line);
  color: var(--ink);
}

.btn-ghost:hover {
  border-color: var(--brand);
  color: var(--brand);
}

.btn-white {
  background: #fff;
  color: var(--brand);
}

.btn-white:hover {
  color: var(--brand-dark);
  transform: translateY(-1px);
}

.btn-sm {
  padding: 10px 20px;
  font-size: 15px;
}

/* ---------- 首屏 ---------- */

.hero {
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, #f3f6ff 0%, #fbfcff 60%, #ffffff 100%);
  border-bottom: 1px solid var(--line-soft);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(22, 82, 240, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(22, 82, 240, 0.05) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(circle at 20% 0%, #000 0%, transparent 70%);
  -webkit-mask-image: radial-gradient(circle at 20% 0%, #000 0%, transparent 70%);
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
  padding: 76px 24px 84px;
}

.hero-copy h1 {
  font-size: clamp(32px, 3.6vw, 52px);
  letter-spacing: -0.01em;
  margin-bottom: 20px;
}

.hero-slogan {
  display: inline-block;
  font-size: clamp(17px, 1.7vw, 22px);
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--brand);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid rgba(22, 82, 240, 0.25);
}

.hero-copy .lead {
  font-size: 17.5px;
  color: var(--muted);
  line-height: 1.9;
  margin-bottom: 30px;
  max-width: 34em;
}

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

.hero-points {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  font-size: 15px;
  color: var(--text);
}

.hero-points span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.hero-points svg {
  color: var(--brand);
}

/* 首屏右侧看板示意图 */

.hero-visual {
  position: relative;
}

.mock {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.mock-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line-soft);
  background: #fafbff;
}

.mock-bar i {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #dfe5f0;
}

.mock-bar i:first-child {
  background: #ff6058;
}

.mock-bar i:nth-child(2) {
  background: #ffbd2e;
}

.mock-bar i:nth-child(3) {
  background: #28c840;
}

.mock-bar em {
  margin-left: 10px;
  font-style: normal;
  font-size: 13px;
  color: var(--muted);
}

.mock-body {
  padding: 20px;
}

.mock-kpis {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 18px;
}

.mock-kpis div {
  background: var(--bg-soft);
  border-radius: 10px;
  padding: 12px 14px;
}

.mock-kpis b {
  display: block;
  font-size: 20px;
  color: var(--ink);
  line-height: 1.4;
}

.mock-kpis span {
  font-size: 12.5px;
  color: var(--muted);
}

.mock-chart {
  display: flex;
  align-items: flex-end;
  gap: 7px;
  height: 96px;
  padding: 0 4px;
  margin-bottom: 18px;
}

.mock-chart span {
  flex: 1;
  border-radius: 4px 4px 2px 2px;
  background: linear-gradient(180deg, #7ea8ff, #1652f0);
  opacity: 0.9;
}

.mock-list {
  list-style: none;
  padding: 0;
  margin: 0;
  font-size: 13.5px;
  color: var(--text);
}

.mock-list li {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 8px 0;
  border-top: 1px solid var(--line-soft);
}

.mock-list .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #28c840;
  flex: none;
}

.mock-list .dot.warn {
  background: #ffbd2e;
}

.mock-list .dot.off {
  background: #c8d2e2;
}

/* ---------- 数据条 ---------- */

.stats-band {
  border-bottom: 1px solid var(--line-soft);
  background: #fff;
}

.stats-band .container {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  padding-top: 32px;
  padding-bottom: 32px;
}

.stat b {
  display: block;
  font-size: 22px;
  color: var(--ink);
  margin-bottom: 4px;
}

.stat span {
  font-size: 14.5px;
  color: var(--muted);
}

/* ---------- 区块 ---------- */

section {
  padding: 84px 0;
}

.section-soft {
  background: var(--bg-soft);
}

.section-head {
  max-width: 46em;
  margin-bottom: 46px;
}

.section-head.center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  font-weight: 600;
  color: var(--brand);
  margin-bottom: 14px;
}

.section-label::before {
  content: "";
  width: 22px;
  height: 2px;
  background: var(--brand);
  display: inline-block;
}

.section-head.center .section-label::before {
  display: none;
}

.section-head h2 {
  font-size: clamp(26px, 2.8vw, 38px);
  margin-bottom: 14px;
}

.section-head p {
  color: var(--muted);
  font-size: 16.5px;
  margin-bottom: 0;
}

/* ---------- 卡片通用 ---------- */

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

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

.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.card:hover {
  transform: translateY(-4px);
  border-color: #c9d9ff;
  box-shadow: var(--shadow);
}

.icon-box {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: var(--brand-soft);
  color: var(--brand);
  display: grid;
  place-items: center;
  margin-bottom: 18px;
}

.card h3 {
  font-size: 19px;
  margin-bottom: 10px;
}

.card p {
  color: var(--muted);
  font-size: 15px;
  margin-bottom: 0;
}

/* ---------- 业务方向 ---------- */

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

.sol-card {
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.sol-card:hover {
  transform: translateY(-4px);
  border-color: #c9d9ff;
  box-shadow: var(--shadow);
}

.sol-card .icon-box {
  background: var(--brand-soft);
}

.sol-card h3 {
  font-size: 19px;
  margin-bottom: 10px;
}

.sol-card p {
  color: var(--muted);
  font-size: 15px;
  flex: 1;
  margin-bottom: 18px;
}

.link-more {
  font-size: 15px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* ---------- 流程 ---------- */

.grid-industries {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.ind-card {
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 28px;
  color: var(--text);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.ind-card:hover {
  transform: translateY(-4px);
  border-color: #c9d9ff;
  box-shadow: var(--shadow);
  color: var(--text);
}

.ind-card h3 {
  font-size: 19px;
  margin-bottom: 10px;
}

.ind-card p {
  color: var(--muted);
  font-size: 15px;
  flex: 1;
  margin-bottom: 18px;
}

/* 痛点清单 */

.pain-list {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  counter-reset: pain;
}

.pain-list li {
  position: relative;
  background: #fff;
  border: 1px solid var(--line);
  border-left: 3px solid var(--brand);
  border-radius: var(--radius);
  padding: 18px 22px 18px 56px;
  font-size: 15.5px;
  margin: 0;
  counter-increment: pain;
}

.pain-list li::before {
  content: counter(pain, decimal-leading-zero);
  position: absolute;
  left: 20px;
  top: 18px;
  font-size: 13px;
  font-weight: 700;
  color: var(--brand);
  letter-spacing: 0.04em;
}

/* 业务架构 */

.arch {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 8px 28px;
}

.arch-layer {
  display: flex;
  gap: 24px;
  align-items: flex-start;
  padding: 22px 0;
  border-bottom: 1px dashed var(--line);
}

.arch-layer:last-child {
  border-bottom: none;
}

.arch-layer > strong {
  flex: none;
  width: 88px;
  font-size: 15.5px;
  color: var(--ink);
  padding-top: 6px;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.chip {
  display: inline-block;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 7px 14px;
  font-size: 14.5px;
  color: var(--text);
}

/* 价值表 */

.table-wrap {
  overflow-x: auto;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
}

.value-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 560px;
}

.value-table th,
.value-table td {
  text-align: left;
  padding: 18px 24px;
  border-bottom: 1px solid var(--line-soft);
  font-size: 15.5px;
}

.value-table thead th {
  background: var(--bg-soft);
  color: var(--ink);
  font-weight: 600;
  font-size: 15px;
}

.value-table tbody th {
  width: 220px;
  color: var(--ink);
  font-weight: 600;
}

.value-table tbody tr:last-child th,
.value-table tbody tr:last-child td {
  border-bottom: none;
}

.grid-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.step {
  position: relative;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 28px 26px;
}

.step .no {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--brand);
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  display: grid;
  place-items: center;
  margin-bottom: 16px;
}

.step h3 {
  font-size: 17.5px;
  margin-bottom: 8px;
}

.step p {
  color: var(--muted);
  font-size: 14.5px;
  margin-bottom: 0;
}

/* ---------- 场景 ---------- */

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

.case-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 26px;
}

.case-card .tag {
  display: inline-block;
  font-size: 12.5px;
  color: var(--brand);
  background: var(--brand-soft);
  border-radius: 6px;
  padding: 4px 10px;
  margin-bottom: 14px;
}

.case-card h3 {
  font-size: 18px;
  margin-bottom: 12px;
}

.case-line {
  font-size: 14.5px;
  color: var(--muted);
  margin-bottom: 8px;
  line-height: 1.75;
}

.case-line strong {
  color: var(--ink);
  font-weight: 600;
}

/* ---------- 优势 ---------- */

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

.adv-card {
  display: flex;
  gap: 18px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 26px;
}

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

.adv-card h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.adv-card p {
  color: var(--muted);
  font-size: 15px;
  margin-bottom: 0;
}

/* ---------- FAQ ---------- */

.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  align-items: start;
}

.faq details {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 22px;
}

.faq details[open] {
  border-color: #c9d9ff;
  box-shadow: var(--shadow-sm);
}

.faq summary {
  list-style: none;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  display: flex;
  justify-content: space-between;
  gap: 16px;
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq summary::after {
  content: "+";
  color: var(--brand);
  font-weight: 700;
  flex: none;
}

.faq details[open] summary::after {
  content: "−";
}

.faq .answer {
  color: var(--muted);
  font-size: 15px;
  margin-top: 12px;
}

/* ---------- CTA ---------- */

.mission-band {
  background: var(--navy);
  color: #fff;
  padding: 72px 0;
}

.mission-quote {
  max-width: 46em;
  margin: 0 auto 44px;
  text-align: center;
  font-size: 16.5px;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.78);
}

.mission-slogan {
  text-align: center;
  color: #fff;
  font-size: clamp(24px, 3vw, 38px);
  letter-spacing: 0.04em;
  margin-bottom: 18px;
}

.mission-items {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  padding-top: 36px;
}

.mission-items h3 {
  color: #fff;
  font-size: 17px;
  margin-bottom: 10px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.mission-items h3::before {
  content: "";
  width: 18px;
  height: 2px;
  background: #5b8cff;
  display: inline-block;
}

.mission-items p {
  color: rgba(255, 255, 255, 0.7);
  font-size: 15px;
  margin-bottom: 0;
  line-height: 1.85;
}

.cta-band {
  background: linear-gradient(120deg, #1652f0 0%, #0a2a80 100%);
  border-radius: var(--radius-lg);
  padding: 54px 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  color: #fff;
  position: relative;
  overflow: hidden;
}

.cta-band::after {
  content: "";
  position: absolute;
  width: 460px;
  height: 460px;
  right: -180px;
  top: -220px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.22) 0%, transparent 70%);
}

.cta-band h2 {
  color: #fff;
  font-size: clamp(22px, 2.4vw, 30px);
  margin-bottom: 10px;
}

.cta-band p {
  color: rgba(255, 255, 255, 0.82);
  margin-bottom: 0;
  max-width: 40em;
  font-size: 15.5px;
}

.cta-band .btn {
  position: relative;
  z-index: 1;
  flex: none;
}

/* ---------- 内页头 ---------- */

.page-hero {
  background: linear-gradient(180deg, #f3f6ff 0%, #ffffff 100%);
  border-bottom: 1px solid var(--line-soft);
  padding: 54px 0 48px;
}

.breadcrumb {
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 16px;
}

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

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

.page-hero h1 {
  font-size: clamp(28px, 3.2vw, 42px);
  margin-bottom: 14px;
}

.page-hero .lead {
  color: var(--muted);
  font-size: 16.5px;
  max-width: 46em;
  margin-bottom: 0;
}

.page-hero .actions {
  margin-top: 26px;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

/* ---------- 交付清单 ---------- */

.check-list {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.check-list li {
  position: relative;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 22px 20px 56px;
  font-size: 15.5px;
  margin: 0;
}

.check-list li::before {
  content: "✓";
  position: absolute;
  left: 22px;
  top: 20px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--brand-soft);
  color: var(--brand);
  font-size: 12px;
  font-weight: 700;
  display: grid;
  place-items: center;
}

.two-col {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 40px;
  align-items: start;
}

.related {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.related a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 18px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--text);
  font-size: 15px;
}

.related a:hover {
  border-color: var(--brand);
  color: var(--brand);
}

/* ---------- 联系 ---------- */

.contact-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.contact-item {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 26px;
}

.contact-item .label {
  font-size: 13.5px;
  color: var(--muted);
  margin-bottom: 10px;
}

.contact-item .value {
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.6;
  word-break: break-word;
}

.note-box {
  background: var(--brand-soft);
  border: 1px solid #d8e4ff;
  border-radius: var(--radius-lg);
  padding: 26px 28px;
  color: var(--text);
  font-size: 15.5px;
}

/* ---------- 页脚 ---------- */

.site-footer {
  background: var(--navy);
  color: rgba(255, 255, 255, 0.66);
  font-size: 14.5px;
  padding: 60px 0 26px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 34px;
  padding-bottom: 34px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-grid h4 {
  color: #fff;
  font-size: 15px;
  margin-bottom: 16px;
}

.footer-grid a,
.footer-grid p {
  display: block;
  color: rgba(255, 255, 255, 0.66);
  margin-bottom: 10px;
  font-size: 14.5px;
}

.footer-grid a:hover {
  color: #fff;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 11px;
  color: #fff;
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 14px;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px;
  padding-top: 20px;
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.5);
}

.footer-bottom a {
  color: rgba(255, 255, 255, 0.5);
}

.footer-bottom a:hover {
  color: #fff;
}

/* ---------- 响应式 ---------- */

@media (max-width: 1080px) {
  .grid-solutions,
  .grid-cases,
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-industries {
    grid-template-columns: repeat(2, 1fr);
  }

  .header-tel {
    display: none;
  }

  .grid-steps,
  .contact-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .hero-inner {
    grid-template-columns: 1fr;
    gap: 44px;
    padding: 60px 24px 66px;
  }

  .stats-band .container {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 900px) {
  .nav-toggle {
    display: inline-flex;
  }

  .header-tel {
    display: none;
  }

  .nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: #fff;
    border-bottom: 1px solid var(--line);
    box-shadow: 0 24px 40px rgba(11, 27, 51, 0.12);
    padding: 8px 24px 18px;
  }

  .nav.open {
    display: flex;
  }

  .nav a {
    padding: 14px 0;
    border-bottom: 1px solid var(--line-soft);
  }

  .nav a::after {
    display: none;
  }

  .header-actions .btn {
    display: none;
  }

  .topbar {
    display: none;
  }
}

@media (max-width: 720px) {
  section {
    padding: 58px 0;
  }

  .grid-solutions,
  .grid-cases,
  .grid-3,
  .grid-2,
  .grid-steps,
  .grid-adv,
  .grid-industries,
  .contact-grid,
  .faq-grid,
  .check-list,
  .pain-list,
  .two-col {
    grid-template-columns: 1fr;
  }

  .arch-layer {
    flex-direction: column;
    gap: 8px;
  }

  .mission-items {
    grid-template-columns: 1fr;
    gap: 22px;
  }

  .arch-layer > strong {
    width: auto;
    padding-top: 0;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 26px;
  }

  .hero-inner {
    padding: 44px 24px 52px;
  }

  .hero-points {
    flex-direction: column;
    gap: 8px;
  }

  .cta-band {
    flex-direction: column;
    align-items: flex-start;
    padding: 32px 26px;
  }

  .card,
  .sol-card,
  .case-card,
  .adv-card,
  .step {
    padding: 22px;
  }
}