/* === 变量 === */
:root {
  --bg: #fafafa;
  --bg-sub: #f0f0f2;
  --text: #111111;
  --text-sub: #666666;
  --text-muted: #999999;
  --border: rgba(0,0,0,0.06);
  --card-bg: #ffffff;
  --accent: #111111;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 16px;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.03);
  --shadow-md: 0 2px 8px rgba(0,0,0,0.04);
  --shadow-lg: 0 4px 16px rgba(0,0,0,0.05);

  --container: 1080px;
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
}

/* === 2026 Apple 风格视觉系统 === */
:root {
  color-scheme: light;
  --bg: #ffffff;
  --bg-sub: #f5f5f7;
  --text: #1d1d1f;
  --text-sub: #6e6e73;
  --text-muted: #86868b;
  --border: rgba(0, 0, 0, 0.08);
  --card-bg: #ffffff;
  --accent: #1d1d1f;
  --accent-hover: #000000;
  --accent-soft: #ececef;
  --radius-sm: 12px;
  --radius-md: 18px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04), 0 8px 24px rgba(0, 0, 0, 0.035);
  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.07), 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 24px 70px rgba(0, 0, 0, 0.12), 0 4px 14px rgba(0, 0, 0, 0.05);
  --container: 1180px;
}

html {
  scroll-padding-top: 68px;
}

body {
  font-size: 16px;
  line-height: 1.47059;
  letter-spacing: -0.012em;
  background: var(--bg);
}

::selection {
  color: #fff;
  background: var(--accent);
}

a,
button,
input,
select,
textarea {
  -webkit-tap-highlight-color: transparent;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid rgba(0, 0, 0, 0.3);
  outline-offset: 3px;
}

.container,
.header-inner {
  width: min(var(--container), calc(100% - 48px));
  margin-left: auto;
  margin-right: auto;
}

/* 导航：轻薄的磨砂玻璃层 */
.site-header {
  background: rgba(250, 250, 252, 0.78);
  border-bottom-color: rgba(0, 0, 0, 0.06);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  backdrop-filter: saturate(180%) blur(20px);
}

.header-inner {
  height: 52px;
}

.brand {
  gap: 10px;
}

.brand-name {
  font-size: 18px;
  font-weight: 650;
  letter-spacing: -0.035em;
}

.brand-tagline {
  color: var(--text-sub);
  font-size: 12px;
}

.nav-main {
  gap: 28px;
}

.nav-link {
  min-height: 44px;
  color: rgba(29, 29, 31, 0.78);
  font-size: 12px;
  letter-spacing: 0;
}

.nav-cta {
  min-height: 30px;
  padding: 0 14px;
  color: #fff;
  background: var(--accent);
  border-radius: 980px;
  font-size: 12px;
}

.nav-cta:hover {
  opacity: 1;
  background: var(--accent-hover);
}

/* 首页首屏：大标题、留白和黑白灰操作层级 */
.hero {
  min-height: 700px;
  display: flex;
  align-items: center;
  padding: 92px 0 104px;
  background:
    radial-gradient(circle at 74% 36%, rgba(158, 158, 168, 0.20), transparent 25%),
    radial-gradient(circle at 88% 78%, rgba(210, 210, 216, 0.28), transparent 24%),
    linear-gradient(180deg, #fbfbfd 0%, #f5f5f7 100%);
}

.hero::before,
.hero::after {
  content: "";
  position: absolute;
  pointer-events: none;
  border-radius: 50%;
  filter: blur(1px);
}

.hero::before {
  right: max(3vw, 24px);
  top: 70px;
  width: 420px;
  height: 420px;
  border: 1px solid rgba(0, 0, 0, 0.07);
}

.hero::after {
  right: 16%;
  bottom: 36px;
  width: 160px;
  height: 160px;
  background: rgba(255, 255, 255, 0.36);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.5);
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
}

.hero-bg {
  display: none;
}

.hero-grid {
  grid-template-columns: minmax(0, 1.18fr) minmax(320px, 0.72fr);
  gap: clamp(56px, 8vw, 112px);
  position: relative;
  z-index: 1;
}

.hero-content {
  animation: apple-rise 0.8s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.hero-badge {
  gap: 8px;
  padding: 8px 14px;
  color: #3a3a3c;
  background: rgba(255, 255, 255, 0.72);
  border-color: rgba(0, 0, 0, 0.1);
  border-radius: 980px;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.03);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  font-size: 13px;
  font-weight: 550;
}

.badge-dot {
  width: 7px;
  height: 7px;
  background: #1d1d1f;
  box-shadow: 0 0 0 4px rgba(0, 0, 0, 0.09);
}

.hero-content h1 {
  max-width: 720px;
  margin-top: 24px;
  font-size: clamp(48px, 6.1vw, 76px);
  font-weight: 700;
  line-height: 1.04;
  letter-spacing: -0.062em;
}

.hero-content h1 em {
  display: block;
  margin-top: 4px;
  color: transparent;
  background: linear-gradient(90deg, #1d1d1f 0%, #48484a 52%, #6e6e73 100%);
  -webkit-background-clip: text;
  background-clip: text;
}

.hero-desc {
  max-width: 630px;
  margin-top: 24px;
  color: var(--text-sub);
  font-size: 20px;
  line-height: 1.5;
  letter-spacing: -0.025em;
}

.hero-tags {
  gap: 8px;
  margin-top: 24px;
}

.tag-sm {
  padding: 7px 12px;
  color: var(--text-sub);
  background: rgba(255, 255, 255, 0.65);
  border: 1px solid rgba(0, 0, 0, 0.06);
  border-radius: 980px;
  font-size: 12px;
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

.hero-actions {
  gap: 14px;
  margin-top: 32px;
}

.btn {
  min-height: 48px;
  padding: 0 24px;
  border-radius: 980px;
  font-size: 15px;
  font-weight: 500;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease, color 0.25s ease, border-color 0.25s ease;
}

.btn-primary {
  background: var(--accent);
  box-shadow: 0 8px 22px rgba(0, 0, 0, 0.16);
}

.btn-primary:hover {
  opacity: 1;
  background: var(--accent-hover);
  box-shadow: 0 11px 26px rgba(0, 0, 0, 0.22);
}

.btn-outline {
  color: var(--accent);
  background: rgba(255, 255, 255, 0.7);
  border-color: rgba(0, 0, 0, 0.22);
}

.btn-outline:hover {
  color: #fff;
  background: var(--accent);
  border-color: var(--accent);
}

.hero-visual {
  animation: apple-rise 0.9s 0.12s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.hero-img-wrap {
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 34px;
  box-shadow: var(--shadow-lg);
  transform: rotate(1.2deg);
}

.hero-img {
  aspect-ratio: 0.82;
}

.hero-stats-mini {
  left: -34px;
  bottom: 28px;
  gap: 10px;
}

.stat-mini {
  min-width: 112px;
  padding: 14px 16px;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 18px;
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.1);
  -webkit-backdrop-filter: saturate(160%) blur(20px);
  backdrop-filter: saturate(160%) blur(20px);
}

.stat-mini-num {
  font-size: 18px;
  letter-spacing: -0.035em;
}

.stat-mini-label {
  margin-top: 2px;
  color: var(--text-sub);
  font-size: 11px;
}

@keyframes apple-rise {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

/* 关键数字 */
.stats-section {
  position: relative;
  z-index: 2;
  margin-top: -42px;
  padding: 0;
}

.stats-grid {
  min-height: 110px;
  padding: 22px 34px;
  background: rgba(255, 255, 255, 0.84);
  border: 1px solid rgba(0, 0, 0, 0.055);
  border-radius: 28px;
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.07);
  -webkit-backdrop-filter: saturate(180%) blur(22px);
  backdrop-filter: saturate(180%) blur(22px);
}

.stat-value {
  color: var(--text);
  font-size: 28px;
  font-weight: 650;
  letter-spacing: -0.045em;
}

.stat-label {
  margin-top: 5px;
  color: var(--text-muted);
  font-size: 12px;
}

.stat-divider {
  height: 36px;
  background: rgba(0, 0, 0, 0.09);
}

/* 内容区块 */
.section {
  padding: 108px 0;
}

.section-header {
  max-width: 780px;
  margin: 0 auto 48px;
}

.eyebrow {
  color: var(--accent);
  font-size: 13px;
  font-weight: 650;
  letter-spacing: 0.08em;
}

.section-header h2 {
  margin-top: 10px;
  font-size: clamp(38px, 5vw, 56px);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.052em;
}

.section-desc {
  margin-top: 14px;
  color: var(--text-sub);
  font-size: 19px;
  line-height: 1.5;
  letter-spacing: -0.02em;
}

.tools-section,
.article-section,
.clients-section,
.contact-section,
.products-section {
  background: var(--bg-sub);
}

/* 选址工具：Apple 式大卡片和非对称布局 */
.tools-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.tool-card {
  position: relative;
  isolation: isolate;
  min-height: 400px;
  padding: 38px;
  overflow: hidden;
  background: #fff;
  border: 0;
  border-radius: 32px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.35s cubic-bezier(0.2, 0.8, 0.2, 1), box-shadow 0.35s ease;
}

.tool-card::after {
  content: "";
  position: absolute;
  z-index: -1;
  right: -70px;
  bottom: -90px;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, rgba(255,255,255,0.94), rgba(142,142,147,0.18) 48%, rgba(72,72,74,0.07) 72%, transparent 73%);
}

.tool-card:first-child {
  grid-column: 1 / -1;
  min-height: 360px;
  background:
    radial-gradient(circle at 78% 48%, rgba(174, 174, 178, 0.25), transparent 25%),
    radial-gradient(circle at 88% 72%, rgba(99, 99, 102, 0.12), transparent 22%),
    #fff;
}

.tool-card:first-child::after {
  right: 5%;
  bottom: -130px;
  width: 520px;
  height: 520px;
}

.tool-card:hover {
  border-color: transparent;
  transform: translateY(-6px) scale(1.006);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.1);
}

.tool-badge {
  padding: 6px 12px;
  color: #3a3a3c;
  background: var(--accent-soft);
  border-radius: 980px;
  font-size: 12px;
  letter-spacing: 0;
}

.tool-card h3 {
  max-width: 520px;
  margin-top: 24px;
  font-size: clamp(30px, 3.8vw, 46px);
  line-height: 1.08;
  letter-spacing: -0.05em;
}

.tool-card p {
  max-width: 520px;
  margin-top: 14px;
  color: var(--text-sub);
  font-size: 17px;
  line-height: 1.55;
}

.tool-metrics {
  gap: 8px;
  margin-top: 22px;
}

.tool-metric {
  padding: 7px 11px;
  background: rgba(0, 0, 0, 0.045);
  border-radius: 980px;
  font-size: 12px;
}

.tool-card .btn {
  margin-top: auto;
  padding-top: 18px;
  color: var(--accent);
  background: transparent;
  border: 0;
  width: fit-content;
}

.tool-card .btn::after {
  content: " →";
}

.tool-card .btn:hover {
  color: var(--accent-hover);
  background: transparent;
}

/* 服务卡片 */
.services-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.service-card {
  min-height: 260px;
  padding: 34px;
  background: var(--bg-sub);
  border: 0;
  border-radius: 28px;
}

.service-card:hover {
  box-shadow: none;
  transform: translateY(-4px);
}

.service-icon,
.article-icon,
.product-icon,
.contact-icon {
  color: var(--accent);
  background: #fff;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.06);
}

.service-icon {
  width: 54px;
  height: 54px;
  border-radius: 16px;
}

.service-icon svg {
  width: 28px;
  height: 28px;
}

.service-card h3 {
  margin-top: 28px;
  font-size: 26px;
  letter-spacing: -0.04em;
}

.service-card p {
  max-width: 430px;
  margin-top: 10px;
  color: var(--text-sub);
  font-size: 16px;
  line-height: 1.55;
}

/* 文章列表 */
.article-card {
  gap: 20px;
  min-height: 104px;
  padding: 20px 24px;
  background: rgba(255, 255, 255, 0.88);
  border-color: rgba(0, 0, 0, 0.055);
  border-radius: 20px;
}

.article-card[style] {
  margin-top: 12px !important;
}

.article-card:hover {
  border-color: rgba(0, 0, 0, 0.18);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.055);
  transform: translateY(-2px);
}

.article-icon {
  width: 50px;
  height: 50px;
  border-radius: 15px;
}

.article-card .article-content h3 {
  font-size: 18px;
  letter-spacing: -0.025em;
}

.article-card .article-content p {
  margin-top: 6px;
  color: var(--text-sub);
  font-size: 14px;
  line-height: 1.5;
}

.article-arrow {
  color: var(--accent);
}

/* 区域折叠卡片 */
body .regions-new {
  gap: 14px;
}

body .region-card {
  border-color: rgba(0, 0, 0, 0.07);
  border-radius: 22px;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.025);
}

body .region-card-header {
  min-height: 76px;
  gap: 14px;
  padding: 18px 22px;
}

body .region-card-header:hover {
  background: #fafafa;
}

body .region-badge {
  padding: 5px 10px;
  border-radius: 980px;
}

body .region-badge-hot {
  color: #3a3a3c;
  background: var(--accent-soft);
}

body .region-badge-normal {
  background: var(--bg-sub);
}

body .region-card-name {
  font-size: 18px;
  letter-spacing: -0.025em;
}

body .region-card-summary {
  color: var(--text-sub);
  font-size: 13px;
}

body .region-card-toggle {
  color: var(--accent);
}

body .region-card-body {
  padding: 0 22px 22px;
  border-top-color: rgba(0, 0, 0, 0.06);
}

body .region-zones {
  gap: 12px;
  margin-top: 18px;
}

body .region-zone,
body .region-transport {
  background: var(--bg-sub);
  border-radius: 16px;
}

body .region-zone {
  padding: 18px;
}

body .region-zone-name {
  font-size: 15px;
}

body .region-zone-desc,
body .region-transport {
  color: var(--text-sub);
  font-size: 13px;
}

/* 客户、关于与个人项目 */
.clients-grid {
  gap: 10px;
}

.client-logo {
  min-height: 58px;
  padding: 14px;
  color: var(--text-sub);
  background: rgba(255, 255, 255, 0.88);
  border: 0;
  border-radius: 14px;
  font-size: 13px;
}

.client-logo:hover {
  color: var(--accent);
  border-color: transparent;
  transform: translateY(-2px);
}

.about-grid {
  gap: 22px;
}

.about-main,
.industries-card,
.target-card {
  padding: 32px;
  background: var(--bg-sub);
  border: 0;
  border-radius: 28px;
}

.about-lead {
  margin-top: 10px;
  font-size: 21px;
  font-weight: 600;
  letter-spacing: -0.03em;
}

.about-text,
.target-card p {
  margin-top: 12px;
  color: var(--text-sub);
  font-size: 15px;
  line-height: 1.7;
}

.timeline-compact {
  margin-top: 24px;
  padding-top: 20px;
}

.timeline-row {
  padding: 9px 0;
}

.timeline-year,
.timeline-event {
  font-size: 14px;
}

.industries-card h3,
.target-card h3 {
  font-size: 18px;
  letter-spacing: -0.025em;
}

.industry-tag {
  padding: 7px 11px;
  background: #fff;
  border-radius: 980px;
}

.products-grid {
  gap: 14px;
}

.product-card {
  min-height: 190px;
  padding: 24px;
  background: #fff;
  border: 0;
  border-radius: 22px;
}

.product-card:hover {
  border-color: transparent;
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.product-icon {
  width: 46px;
  height: 46px;
  border-radius: 14px;
}

.product-card h3 {
  margin-top: 22px;
  font-size: 18px;
  letter-spacing: -0.025em;
}

.product-card p {
  margin-top: 7px;
  color: var(--text-sub);
  font-size: 13px;
  line-height: 1.5;
}

/* 联系卡片：深色高对比的唯一转化焦点 */
.contact-card {
  max-width: 760px;
  padding: 54px;
  color: #f5f5f7;
  background:
    radial-gradient(circle at 14% 12%, rgba(255, 255, 255, 0.12), transparent 28%),
    radial-gradient(circle at 92% 88%, rgba(142, 142, 147, 0.22), transparent 30%),
    #101012;
  border: 0;
  border-radius: 34px;
  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.16);
}

.contact-header h2 {
  font-size: clamp(34px, 5vw, 50px);
  line-height: 1.08;
  letter-spacing: -0.05em;
}

.contact-header p {
  margin-top: 12px;
  color: rgba(245, 245, 247, 0.67);
  font-size: 16px;
}

.contact-ways {
  gap: 10px;
  margin-top: 30px;
  margin-bottom: 26px;
}

.contact-way {
  min-height: 76px;
  padding: 14px 18px;
  background: rgba(255, 255, 255, 0.09);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 18px;
}

.contact-way:hover {
  background: rgba(255, 255, 255, 0.14);
}

.contact-icon {
  width: 46px;
  height: 46px;
  color: #f5f5f7;
  background: rgba(255, 255, 255, 0.12);
  box-shadow: none;
  border-radius: 14px;
}

.contact-label,
.contact-note,
.contact-arrow {
  color: rgba(245, 245, 247, 0.52);
}

.contact-value {
  color: #fff;
  font-size: 17px;
}

.contact-card .btn-outline {
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.25);
}

.contact-card .btn-outline:hover {
  background: rgba(255, 255, 255, 0.18);
}

.contact-btn-wechat,
.contact-btn-wechat.copied {
  background: #1d1d1f;
}

.contact-btn-wechat:hover {
  background: #000;
}

.pro-label,
.con-label {
  color: #3a3a3c;
  background: #ececef;
}

/* 文章和工具内页 */
.article-hero,
.tool-hero {
  padding: 68px 0 52px;
  background:
    radial-gradient(circle at 82% 20%, rgba(142, 142, 147, 0.16), transparent 24%),
    linear-gradient(180deg, #fbfbfd, #f5f5f7);
  border-bottom: 0;
}

.article-back,
.tool-back {
  min-height: 44px;
  color: var(--accent);
  font-size: 14px;
}

.article-tag,
.tool-tag {
  padding: 6px 11px;
  color: #3a3a3c;
  background: var(--accent-soft);
  border: 0;
  border-radius: 980px;
}

.article-title,
.tool-title {
  font-size: clamp(40px, 6vw, 64px);
  line-height: 1.06;
  letter-spacing: -0.055em;
}

.article-subtitle,
.tool-subtitle {
  margin-top: 18px;
  color: var(--text-sub);
  font-size: 19px;
  line-height: 1.55;
}

.article-body {
  padding: 64px 0 100px;
}

.article-content {
  max-width: 760px;
}

.article-intro,
.article-ending,
.point-tip {
  background: var(--bg-sub);
  border-radius: 18px;
}

.article-intro {
  padding: 24px 26px;
  border-left-color: var(--accent);
  font-size: 17px;
  line-height: 1.75;
}

.article-point,
.industry-card,
.article-contact-block {
  padding: 28px;
  border-color: rgba(0, 0, 0, 0.065);
  border-radius: 24px;
  box-shadow: var(--shadow-sm);
}

.point-num {
  width: 38px;
  height: 38px;
  background: var(--accent);
  border-radius: 12px;
}

.point-title,
.industry-title {
  font-size: 19px;
}

.point-body,
.industry-body,
.article-ending {
  font-size: 16px;
}

.article-contact-block {
  margin-top: 56px;
}

.contact-block-headline {
  font-size: 26px;
  letter-spacing: -0.04em;
}

.contact-btn-call {
  background: var(--accent);
  border-radius: 980px;
}

.contact-btn-wechat {
  border-radius: 980px;
}

.tool-layout {
  gap: 24px;
  margin-top: 40px;
}

.tool-panel,
.tool-result,
.tool-aside,
.tool-note,
.tool-cta-strip {
  border-color: rgba(0, 0, 0, 0.065);
  border-radius: 26px;
  box-shadow: var(--shadow-sm);
}

.tool-panel,
.tool-result,
.tool-aside,
.tool-note {
  padding: 30px;
}

.tool-panel h2,
.tool-result h2,
.tool-aside h2,
.tool-note h2 {
  font-size: 22px;
  letter-spacing: -0.035em;
}

.tool-field label {
  color: var(--text-sub);
  font-size: 13px;
}

.tool-field input,
.tool-field select,
.tool-field textarea {
  min-height: 50px;
  background: var(--bg-sub);
  border-color: transparent;
  border-radius: 14px;
  font-size: 16px;
}

.tool-field input:focus,
.tool-field select:focus,
.tool-field textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(0, 0, 0, 0.1);
}

.tool-result-value {
  color: var(--accent);
  font-size: 22px;
}

.project-card-input,
.compare-result-card {
  background: var(--bg-sub);
  border: 0;
  border-radius: 20px;
}

.site-footer {
  padding: 42px 0;
  background: var(--bg-sub);
  border-top: 0;
}

.footer-inner {
  gap: 12px;
}

.footer-name {
  font-size: 16px;
}

/* 精细交互只在支持悬停的设备启用 */
@media (hover: hover) {
  .nav-link:hover,
  .footer-link:hover {
    color: var(--accent);
  }
}

@media (max-width: 980px) {
  .nav-main {
    gap: 18px;
  }

  .hero {
    min-height: auto;
  }

  .hero-grid {
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 44px;
  }

  .hero-content h1 {
    font-size: clamp(44px, 6.8vw, 64px);
  }

  .products-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  .container,
  .header-inner {
    width: min(100% - 32px, var(--container));
  }

  .header-inner {
    height: 50px;
  }

  .brand-tagline {
    display: none;
  }

  .nav-main {
    top: 50px;
    gap: 0;
    padding: 12px 16px 22px;
    background: rgba(250, 250, 252, 0.96);
    -webkit-backdrop-filter: saturate(180%) blur(24px);
    backdrop-filter: saturate(180%) blur(24px);
  }

  .nav-link,
  .nav-cta {
    min-height: 48px;
    font-size: 15px;
  }

  .nav-link {
    justify-content: flex-start;
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  }

  .nav-cta {
    margin-top: 12px;
  }

  .hero {
    padding: 58px 0 72px;
  }

  .hero::before,
  .hero::after {
    display: none;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 42px;
  }

  .hero-content {
    text-align: center;
  }

  .hero-badge {
    margin: 0 auto;
  }

  .hero-content h1 {
    margin-left: auto;
    margin-right: auto;
    font-size: clamp(40px, 11vw, 58px);
    line-height: 1.03;
  }

  .hero-desc {
    margin-left: auto;
    margin-right: auto;
    font-size: 18px;
  }

  .hero-tags,
  .hero-actions {
    justify-content: center;
  }

  .hero-visual {
    order: 0;
    width: min(78vw, 340px);
    max-width: none;
  }

  .hero-img-wrap {
    transform: none;
  }

  .hero-stats-mini {
    bottom: 18px;
    left: 50%;
    flex-direction: row;
    transform: translateX(-50%);
  }

  .stat-mini {
    min-width: 104px;
    padding: 12px 13px;
  }

  .stat-mini-num {
    font-size: 16px;
  }

  .stats-section {
    margin-top: -28px;
  }

  .stats-grid {
    min-height: 0;
    gap: 18px;
    padding: 22px 14px;
  }

  .stat-item {
    flex-basis: calc(50% - 9px);
  }

  .stat-value {
    font-size: 22px;
  }

  .section {
    padding: 76px 0;
  }

  .section-header {
    margin-bottom: 34px;
  }

  .section-header h2 {
    font-size: clamp(34px, 10vw, 46px);
  }

  .section-desc {
    font-size: 17px;
  }

  .tools-grid,
  .services-grid,
  .about-grid {
    grid-template-columns: 1fr;
  }

  .tool-card:first-child {
    grid-column: auto;
  }

  .tool-card,
  .tool-card:first-child {
    min-height: 360px;
    padding: 28px;
  }

  .tool-card h3 {
    font-size: 34px;
  }

  .service-card {
    min-height: 230px;
    padding: 28px;
  }

  .article-card {
    align-items: flex-start;
    gap: 14px;
    min-height: 0;
    padding: 18px;
  }

  .article-card .article-content h3 {
    font-size: 16px;
  }

  .article-card .article-content p {
    font-size: 13px;
  }

  .article-icon {
    width: 42px;
    height: 42px;
  }

  .article-arrow {
    display: none;
  }

  .clients-grid,
  .products-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .about-main,
  .industries-card,
  .target-card,
  .contact-card {
    padding: 26px;
  }

  .contact-card {
    border-radius: 28px;
  }

  .article-hero,
  .tool-hero {
    padding: 44px 0 36px;
  }

  .article-title,
  .tool-title {
    font-size: clamp(36px, 10vw, 48px);
  }

  .article-subtitle,
  .tool-subtitle {
    font-size: 17px;
  }

  .article-body {
    padding: 46px 0 72px;
  }

  .tool-layout,
  .tool-form-grid {
    grid-template-columns: 1fr;
  }

  .tool-panel,
  .tool-result,
  .tool-aside,
  .tool-note {
    padding: 24px;
  }
}

@media (max-width: 460px) {
  .container,
  .header-inner {
    width: min(100% - 24px, var(--container));
  }

  .hero {
    padding-top: 44px;
  }

  .hero-content h1 {
    font-size: 40px;
  }

  .hero-desc {
    font-size: 17px;
  }

  .hero-actions {
    flex-direction: column;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .hero-tags {
    gap: 6px;
  }

  .tag-sm {
    padding: 6px 9px;
  }

  .stats-grid {
    border-radius: 22px;
  }

  .section {
    padding: 64px 0;
  }

  .tool-card,
  .tool-card:first-child {
    min-height: 330px;
    padding: 24px;
    border-radius: 26px;
  }

  .tool-card h3 {
    font-size: 30px;
  }

  .services-grid,
  .clients-grid,
  .products-grid {
    grid-template-columns: 1fr;
  }

  .service-card,
  .product-card {
    min-height: 0;
  }

  body .region-card-summary {
    display: none;
  }

  body .region-card-header {
    padding: 16px;
  }

  body .region-card-body {
    padding: 0 16px 16px;
  }

  .contact-card {
    padding: 32px 18px;
  }

  .contact-way {
    padding: 12px;
  }

  .contact-value {
    font-size: 15px;
  }

  .contact-cta {
    flex-direction: column;
  }

  .article-point,
  .industry-card,
  .article-contact-block {
    padding: 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* 原始样式保留在低优先级层，便于回退与兼容旧页面结构。 */
@layer legacy {

/* === 基础 === */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 14px;
  line-height: 1.5;
  color: var(--text);
  background: var(--bg);
}

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

a {
  text-decoration: none;
  color: inherit;
  transition: color 0.2s;
}

.container {
  width: min(var(--container), calc(100% - 24px));
  margin: 0 auto;
}

/* === 导航 === */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250,250,250,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 8px;
  min-height: 44px;
}

.brand-name {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.brand-tagline {
  font-size: 12px;
  color: var(--text-muted);
}

.nav-main {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  font-size: 14px;
  color: var(--text-sub);
  transition: color 0.2s;
}

.nav-link:hover {
  color: var(--text);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 36px;
  padding: 0 14px;
  font-size: 13px;
  font-weight: 500;
  background: var(--accent);
  color: #fff;
  border-radius: 6px;
  transition: opacity 0.2s;
}

.nav-cta:hover {
  opacity: 0.85;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

.nav-toggle span {
  display: block;
  width: 22px;
  margin: 0 auto;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: 0.2s;
}

.nav-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}
.nav-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* === Hero === */
.hero {
  position: relative;
  padding: 28px 0;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: 0;
  right: 0;
  width: 55%;
  height: 100%;
  background: linear-gradient(135deg, #f5f5f7 0%, #fafafa 100%);
  border-radius: 0 0 0 60px;
  z-index: -1;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 32px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  font-size: 12px;
  color: var(--text-sub);
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 100px;
}

.badge-dot {
  width: 6px;
  height: 6px;
  background: #22c55e;
  border-radius: 50%;
}

.hero-content h1 {
  margin-top: 12px;
  font-size: clamp(24px, 5vw, 36px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.03em;
}

.hero-content h1 em {
  font-style: normal;
  color: var(--text-sub);
}

.hero-desc {
  margin-top: 10px;
  font-size: 14px;
  color: var(--text-sub);
  max-width: 440px;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 14px;
}

.tag-sm {
  padding: 5px 10px;
  font-size: 12px;
  color: var(--text-sub);
  background: var(--bg-sub);
  border-radius: 4px;
}

.hero-actions {
  display: flex;
  gap: 10px;
  margin-top: 18px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-height: 40px;
  padding: 0 16px;
  border: 1px solid transparent;
  font-size: 13px;
  font-weight: 500;
  font-family: inherit;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s;
}

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

.btn-primary:hover {
  opacity: 0.85;
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-outline:hover {
  background: var(--bg-sub);
  border-color: var(--text-sub);
}

.btn-lg {
  min-height: 44px;
  padding: 0 24px;
  font-size: 14px;
  border-radius: 8px;
}

/* Hero 图片 */
.hero-visual {
  position: relative;
}

.hero-img-wrap {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.hero-img {
  width: 100%;
  aspect-ratio: 4/5;
  object-fit: cover;
}

.hero-stats-mini {
  position: absolute;
  bottom: 16px;
  left: -16px;
  display: flex;
  gap: 8px;
}

.stat-mini {
  display: flex;
  flex-direction: column;
  padding: 10px 14px;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(8px);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
}

.stat-mini-num {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.stat-mini-label {
  font-size: 11px;
  color: var(--text-muted);
}

/* === 数据区 === */
.stats-section {
  padding: 20px 0;
}

.stats-grid {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  padding: 14px 20px;
  background: var(--card-bg);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.stat-value {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
}

.stat-label {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 2px;
}

.stat-divider {
  width: 1px;
  height: 24px;
  background: var(--border);
}

/* === 精选内容 === */
.featured-section {
  padding: 24px 0;
}

.featured-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

.featured-card {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px;
  background: var(--card-bg);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  transition: all 0.2s;
}

.featured-card:hover {
  border-color: var(--text-sub);
  transform: translateY(-2px);
}

.featured-icon {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-sub);
  border-radius: var(--radius-sm);
  color: var(--text-sub);
}

.featured-content h3 {
  font-size: 13px;
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: 4px;
}

.featured-content p {
  font-size: 11px;
  color: var(--text-muted);
  line-height: 1.4;
}

.featured-more {
  margin-top: 16px;
  text-align: center;
}

/* === 通用区块 === */
.section {
  padding: 32px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 20px;
}

.eyebrow {
  font-size: 11px;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.section-header h2 {
  margin-top: 6px;
  font-size: clamp(20px, 4vw, 26px);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.section-desc {
  margin-top: 6px;
  font-size: 13px;
  color: var(--text-sub);
}

/* === 产品卡片 === */
.products-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}

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

.tool-card {
  display: flex;
  flex-direction: column;
  padding: 18px;
  background: linear-gradient(180deg, #ffffff, #f7f5f1);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all 0.2s;
}

.tool-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--text-sub);
}

.tool-badge {
  display: inline-flex;
  width: fit-content;
  padding: 4px 10px;
  border-radius: 999px;
  background: #f2f2f2;
  color: var(--text-muted);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.tool-card h3 {
  margin-top: 12px;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.tool-card p {
  margin-top: 8px;
  font-size: 13px;
  color: var(--text-sub);
  line-height: 1.6;
}

.tool-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.tool-metric {
  padding: 6px 10px;
  background: var(--bg-sub);
  color: var(--text-sub);
  border-radius: 999px;
  font-size: 11px;
}

.tool-card .btn {
  margin-top: 18px;
  width: fit-content;
}

.product-card {
  display: flex;
  flex-direction: column;
  padding: 12px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: all 0.2s;
}

.product-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
  border-color: var(--text-sub);
}

.product-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--bg-sub);
  border-radius: var(--radius-sm);
  color: var(--text-sub);
}

.product-card h3 {
  margin-top: 8px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.product-card p {
  margin-top: 4px;
  font-size: 11px;
  color: var(--text-muted);
  line-height: 1.4;
}

/* === 服务卡片 === */
.services-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.service-card {
  padding: 14px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: all 0.2s;
}

.service-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.service-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: var(--bg-sub);
  border-radius: var(--radius-sm);
  color: var(--text-sub);
}

.service-card h3 {
  margin-top: 10px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.service-card p {
  margin-top: 4px;
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.4;
}

/* === 精选文章 === */
.article-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all 0.2s;
}

.article-card:hover {
  border-color: var(--text-sub);
  transform: translateX(4px);
}

.article-icon {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--bg-sub);
  border-radius: var(--radius-md);
  color: var(--accent);
}

.article-content {
  flex: 1;
  min-width: 0;
}

.article-content h3 {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.3;
}

.article-content p {
  margin-top: 4px;
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.4;
}

.article-arrow {
  flex-shrink: 0;
  color: var(--text-muted);
}

/* === 区域 === */
.regions-card {
  padding: 18px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.regions-header {
  margin-bottom: 16px;
}

.regions-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.region-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  background: var(--bg-sub);
  border-radius: var(--radius-sm);
}

.region-priority {
  background: var(--accent);
  color: #fff;
}

.region-rank {
  font-size: 12px;
  font-weight: 600;
  opacity: 0.6;
}

.region-name {
  font-size: 14px;
  font-weight: 600;
}

.region-desc {
  font-size: 12px;
  opacity: 0.7;
  margin-left: auto;
}

/* === 客户 === */
.clients-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}

.client-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-sub);
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  text-align: center;
  transition: all 0.2s;
}

.client-logo:hover {
  color: var(--text);
  border-color: var(--text-sub);
}

/* === 关于 === */
.about-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 14px;
}

.about-main {
  padding: 18px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.about-lead {
  margin-top: 6px;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: -0.01em;
}

.about-text {
  margin-top: 8px;
  font-size: 13px;
  color: var(--text-sub);
  line-height: 1.6;
}

.timeline-compact {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}

.timeline-row {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 6px 0;
}

.timeline-row + .timeline-row {
  border-top: 1px solid var(--bg-sub);
}

.timeline-year {
  flex-shrink: 0;
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
}

.timeline-event {
  font-size: 13px;
  color: var(--text-muted);
}

.about-side {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.industries-card,
.target-card {
  padding: 20px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.industries-card h3,
.target-card h3 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 14px;
}

.industries-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.industry-tag {
  padding: 5px 10px;
  font-size: 12px;
  color: var(--text-sub);
  background: var(--bg-sub);
  border-radius: 4px;
}

.target-card p {
  font-size: 13px;
  color: var(--text-sub);
  line-height: 1.6;
}

/* === 联系 === */
.contact-card {
  padding: 24px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  text-align: center;
  max-width: 560px;
  margin: 0 auto;
}

.contact-header {
  margin-bottom: 18px;
}

.contact-header p {
  margin-top: 4px;
  font-size: 13px;
  color: var(--text-sub);
}

.contact-ways {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 18px;
}

.contact-way {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 64px;
  padding: 12px;
  background: var(--bg-sub);
  border-radius: var(--radius-sm);
  transition: all 0.2s;
}

.contact-way:hover {
  background: var(--bg);
}

.contact-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--card-bg);
  border-radius: var(--radius-sm);
  color: var(--text-sub);
}

.contact-info {
  flex: 1;
  text-align: left;
}

.contact-label {
  display: block;
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.contact-value {
  display: block;
  font-size: 16px;
  font-weight: 600;
  margin-top: 2px;
}

.contact-note {
  display: block;
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 2px;
}

.contact-arrow {
  font-size: 18px;
  color: var(--text-muted);
}

.contact-cta {
  display: flex;
  gap: 10px;
  justify-content: center;
}

/* === 页脚 === */
.site-footer {
  padding: 24px 0;
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  text-align: center;
}

.footer-brand {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.footer-name {
  font-size: 15px;
  font-weight: 600;
}

.footer-tagline {
  font-size: 12px;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
}

.footer-link {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  color: var(--text-sub);
  transition: color 0.2s;
}

.footer-link:hover {
  color: var(--text);
}

.footer-divider {
  color: var(--text-muted);
}

.footer-copy {
  font-size: 11px;
  color: var(--text-muted);
}

/* === 响应式 === */
@media (max-width: 900px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .hero-visual {
    order: -1;
    max-width: 200px;
    margin: 0 auto;
  }

  .hero-stats-mini {
    left: 50%;
    transform: translateX(-50%);
    bottom: 10px;
    gap: 6px;
  }

  .stat-mini {
    padding: 6px 10px;
  }

  .stat-mini-num {
    font-size: 12px;
  }

  .stat-mini-label {
    font-size: 9px;
  }

  .hero-bg {
    width: 100%;
    height: 35%;
    border-radius: 0 0 0 30px;
  }

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

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

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

  .clients-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .about-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .nav-main {
    position: fixed;
    top: 56px;
    left: 0;
    right: 0;
    flex-direction: column;
    padding: 20px;
    background: var(--card-bg);
    border-bottom: 1px solid var(--border);
    gap: 8px;
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s;
  }

  .nav-main.nav-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-link,
  .nav-cta {
    width: 100%;
    justify-content: center;
    min-height: 40px;
  }

  .hero {
    padding: 16px 0;
  }

  .hero-content h1 {
    font-size: 22px;
  }

  .hero-desc {
    font-size: 13px;
  }

  .hero-actions {
    flex-direction: column;
    margin-top: 14px;
  }

  .btn {
    width: 100%;
  }

  .stats-grid {
    flex-wrap: wrap;
    gap: 12px;
    padding: 12px;
  }

  .stat-divider {
    display: none;
  }

  .stat-item {
    flex: 1 1 calc(50% - 6px);
    min-width: 80px;
  }

  .stat-value {
    font-size: 16px;
  }

  .stat-label {
    font-size: 10px;
  }

  .section {
    padding: 24px 0;
  }

  .section-header {
    margin-bottom: 14px;
  }

  .services-grid {
    grid-template-columns: 1fr 1fr;
    gap: 8px;
  }

  .service-card {
    padding: 12px;
  }

  .service-card h3 {
    font-size: 13px;
  }

  .service-card p {
    font-size: 11px;
  }

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

  .product-card {
    padding: 10px;
  }

  .product-card h3 {
    font-size: 13px;
  }

  .product-card p {
    font-size: 10px;
  }

  .product-icon {
    font-size: 20px;
  }

  .regions-card {
    padding: 14px;
  }

  .regions-list {
    grid-template-columns: 1fr 1fr;
    gap: 6px;
  }

  .region-item {
    flex-wrap: wrap;
    padding: 8px 10px;
  }

  .region-rank {
    font-size: 10px;
  }

  .region-name {
    font-size: 12px;
  }

  .region-desc {
    display: none;
  }

  .clients-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 6px;
  }

  .client-logo {
    padding: 10px 8px;
    font-size: 11px;
  }

  .about-main {
    padding: 14px;
  }

  .about-lead {
    font-size: 14px;
  }

  .about-text {
    font-size: 12px;
  }

  .timeline-row {
    flex-direction: column;
    gap: 2px;
  }

  .timeline-year {
    font-size: 12px;
  }

  .timeline-event {
    font-size: 11px;
  }

  .about-side {
    gap: 10px;
  }

  .industries-card,
  .target-card {
    padding: 12px;
  }

  .contact-card {
    padding: 18px 14px;
  }

  .contact-way {
    padding: 14px;
  }

  .contact-arrow {
    display: none;
  }

  .contact-cta {
    flex-direction: column;
  }
}

@media (max-width: 400px) {
  .services-grid {
    grid-template-columns: 1fr;
  }

  .regions-list {
    grid-template-columns: 1fr;
  }

  .clients-grid {
    grid-template-columns: 1fr 1fr;
  }

  .hero-stats-mini {
    flex-direction: column;
    bottom: 12px;
    gap: 6px;
  }
}

/* === 文章页通用样式 === */
.article-page { min-height: 100vh; }

.article-hero {
  padding: 32px 0 24px;
  border-bottom: 1px solid var(--border);
}

.article-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 36px;
  font-size: 13px;
  color: var(--text-sub);
  margin-bottom: 20px;
  transition: color 0.2s;
}
.article-back:hover { color: var(--text); }

.article-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.article-tag {
  padding: 4px 10px;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-sub);
  background: var(--bg-sub);
  border-radius: 4px;
}

.article-date { font-size: 12px; color: var(--text-muted); }

.article-title {
  font-size: clamp(22px, 5vw, 34px);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.03em;
  max-width: 700px;
}

.article-subtitle {
  margin-top: 10px;
  font-size: 15px;
  color: var(--text-sub);
  max-width: 620px;
  line-height: 1.5;
}

.article-body { padding: 32px 0 56px; }

.article-content { max-width: 680px; }

.article-intro {
  font-size: 15px;
  color: var(--text-sub);
  line-height: 1.7;
  margin-bottom: 28px;
  padding: 16px 18px;
  background: var(--bg-sub);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--accent);
}

/* 文章地图图片 */
.article-map {
  margin-bottom: 32px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
}
.article-map img { width: 100%; display: block; }
.article-map figcaption {
  padding: 10px 14px;
  font-size: 12px;
  color: var(--text-muted);
  background: var(--bg-sub);
  text-align: center;
}

/* 文章要点卡片 */
.article-point {
  margin-bottom: 16px;
  padding: 20px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: box-shadow 0.2s;
}
.article-point:hover { box-shadow: var(--shadow-md); }

.point-header {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 12px;
}

.point-num {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: var(--accent);
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  border-radius: var(--radius-sm);
}

.point-title {
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.4;
  padding-top: 4px;
}

.point-body {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.75;
  padding-left: 46px;
}

.point-body p + p { margin-top: 10px; }

.point-tip {
  margin-top: 12px;
  padding: 10px 14px;
  background: var(--bg-sub);
  border-radius: var(--radius-sm);
  font-size: 13px;
  color: var(--text-sub);
  line-height: 1.6;
}
.point-tip strong { color: var(--text); }

/* 行业区块 */
.industry-section { margin-bottom: 16px; }

.industry-card {
  padding: 20px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: box-shadow 0.2s;
}
.industry-card:hover { box-shadow: var(--shadow-md); }

.industry-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.industry-icon { font-size: 22px; line-height: 1; flex-shrink: 0; }

.industry-title {
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.industry-body {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.75;
}
.industry-body p + p { margin-top: 8px; }

.area-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 12px;
}

.area-tag {
  padding: 4px 10px;
  font-size: 12px;
  color: var(--text-sub);
  background: var(--bg-sub);
  border-radius: 4px;
  font-weight: 500;
}

.company-list {
  margin-top: 10px;
  padding: 10px 14px;
  background: var(--bg-sub);
  border-radius: var(--radius-sm);
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.6;
}
.company-list strong { color: var(--text-sub); }

/* 优缺点标签 */
.pros-cons {
  margin-top: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.pro-item, .con-item {
  display: flex;
  gap: 10px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-sub);
}

.pro-label {
  flex-shrink: 0;
  font-size: 12px;
  font-weight: 600;
  color: #16a34a;
  background: #dcfce7;
  padding: 2px 8px;
  border-radius: 4px;
  height: fit-content;
  margin-top: 2px;
}

.con-label {
  flex-shrink: 0;
  font-size: 12px;
  font-weight: 600;
  color: #dc2626;
  background: #fee2e2;
  padding: 2px 8px;
  border-radius: 4px;
  height: fit-content;
  margin-top: 2px;
}

/* 文章结尾 */
.article-ending {
  margin-top: 16px;
  padding: 18px 20px;
  background: var(--bg-sub);
  border-radius: var(--radius-md);
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.7;
}
.article-ending p + p { margin-top: 8px; }

/* === 文章联系块（统一样式）=== */
.article-contact-block {
  margin-top: 40px;
  padding: 28px 24px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  text-align: center;
}

.contact-block-author {
  display: flex;
  align-items: center;
  gap: 12px;
  justify-content: center;
  margin-bottom: 18px;
}

.contact-block-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  object-fit: cover;
}

.contact-block-name {
  font-size: 15px;
  font-weight: 600;
  text-align: left;
}

.contact-block-role {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 2px;
  text-align: left;
}

.contact-block-headline {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.contact-block-sub {
  font-size: 13px;
  color: var(--text-sub);
  line-height: 1.6;
  margin-bottom: 22px;
  max-width: 360px;
  margin-left: auto;
  margin-right: auto;
}

.contact-block-btns {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-width: 340px;
  margin: 0 auto;
}

.contact-btn-call {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 52px;
  background: var(--accent);
  color: #fff;
  border-radius: var(--radius-md);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.01em;
  transition: opacity 0.2s, transform 0.2s;
  text-decoration: none;
}
.contact-btn-call:hover { opacity: 0.88; transform: translateY(-1px); }

.contact-btn-wechat {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 46px;
  background: #07c160;
  color: #fff;
  border: none;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: opacity 0.2s;
  width: 100%;
  font-family: inherit;
}
.contact-btn-wechat:hover { opacity: 0.88; }
.contact-btn-wechat.copied { background: #059950; }

.contact-btn-email {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 36px;
  font-size: 13px;
  color: var(--text-muted);
  padding: 8px;
  transition: color 0.2s;
  text-decoration: none;
}
.contact-btn-email:hover { color: var(--text); }

.tool-page {
  min-height: 100vh;
}

.tool-hero {
  padding: 36px 0 18px;
  background: radial-gradient(circle at top right, rgba(0, 0, 0, 0.04), transparent 28%), linear-gradient(180deg, #f7f7f8, #fafafa);
  border-bottom: 1px solid var(--border);
}

.tool-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 36px;
  font-size: 13px;
  color: var(--text-sub);
  margin-bottom: 18px;
}

.tool-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tool-tag {
  display: inline-flex;
  padding: 5px 10px;
  border-radius: 999px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  color: var(--text-sub);
  font-size: 12px;
}

.tool-title {
  margin-top: 14px;
  font-size: clamp(28px, 5vw, 40px);
  line-height: 1.18;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.tool-subtitle {
  margin-top: 10px;
  max-width: 700px;
  font-size: 15px;
  color: var(--text-sub);
  line-height: 1.75;
}

.tool-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
  gap: 18px;
  margin-top: 28px;
  align-items: start;
}

.tool-panel,
.tool-result,
.tool-aside,
.tool-note,
.tool-cta-strip {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
}

.tool-panel,
.tool-result,
.tool-aside,
.tool-note {
  padding: 22px;
}

.tool-panel h2,
.tool-result h2,
.tool-aside h2,
.tool-note h2 {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.tool-panel h2 + p,
.tool-result h2 + p,
.tool-aside h2 + p,
.tool-note h2 + p {
  margin-top: 6px;
  color: var(--text-sub);
  font-size: 13px;
  line-height: 1.65;
}

.tool-form {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}

.tool-form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.tool-field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.tool-field label {
  font-size: 12px;
  color: var(--text-sub);
}

.tool-field input,
.tool-field select,
.tool-field textarea {
  height: 44px;
  padding: 0 14px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #fff;
  font: inherit;
  color: var(--text);
}

.tool-field input:focus,
.tool-field select:focus,
.tool-field textarea:focus {
  outline: none;
  border-color: var(--text-sub);
  box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.04);
}

.tool-field textarea {
  min-height: 92px;
  height: auto;
  padding: 12px 14px;
  resize: vertical;
  line-height: 1.6;
}

.tool-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 36px;
  padding: 0 2px;
  margin-top: 6px;
  font-size: 13px;
  color: var(--text-sub);
  cursor: pointer;
}

.tool-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.tool-actions .btn,
.tool-actions button.btn {
  cursor: pointer;
  font-family: inherit;
}

.tool-result-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 18px;
}

.tool-result-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--border);
}

.tool-result-row:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.tool-result-label {
  font-size: 13px;
  color: var(--text-sub);
}

.tool-result-value {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.tool-inline-note {
  margin-top: 12px;
  color: var(--text-sub);
  font-size: 13px;
  line-height: 1.6;
}

.tool-compare-table {
  margin-top: 18px;
  display: grid;
  gap: 10px;
}

.tool-compare-head,
.tool-compare-line {
  display: grid;
  grid-template-columns: 1.15fr 1fr 1fr;
  gap: 12px;
  align-items: center;
}

.tool-compare-head {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 700;
}

.tool-compare-line {
  padding: 12px 0;
  border-bottom: 1px dashed var(--border);
}

.tool-compare-line:last-child {
  border-bottom: none;
}

.tool-compare-line span:nth-child(2),
.tool-compare-line span:nth-child(3),
.tool-compare-head span:nth-child(2),
.tool-compare-head span:nth-child(3) {
  text-align: right;
}

.tool-checklist {
  margin-top: 16px;
  display: grid;
  gap: 10px;
}

.tool-checklist-item {
  display: flex;
  gap: 10px;
  font-size: 14px;
  color: var(--text);
  line-height: 1.6;
}

.tool-checklist-item::before {
  content: "•";
  color: var(--text-muted);
}

.tool-help-list {
  margin-top: 14px;
  display: grid;
  gap: 10px;
}

.tool-help-list li {
  margin-left: 18px;
  color: var(--text-sub);
  line-height: 1.65;
}

.tool-cta-strip {
  margin-top: 18px;
  padding: 20px 22px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.tool-cta-text {
  flex: 1;
  min-width: 220px;
}

.tool-cta-text strong {
  display: block;
  font-size: 18px;
  letter-spacing: -0.02em;
}

.tool-cta-text span {
  display: block;
  margin-top: 4px;
  color: var(--text-sub);
  font-size: 13px;
}

.tool-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.project-stack {
  margin-top: 18px;
  display: grid;
  gap: 14px;
}

.project-card-input {
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: #f8f8f9;
}

.project-card-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.project-card-head strong {
  display: block;
  font-size: 16px;
  letter-spacing: -0.02em;
}

.project-card-head span {
  display: block;
  margin-top: 4px;
  color: var(--text-sub);
  font-size: 12px;
}

.project-remove {
  min-height: 36px;
  padding: 0 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: #fff;
  color: var(--text-sub);
  font: inherit;
  cursor: pointer;
}

.project-input-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.compare-project-grid {
  margin-top: 18px;
  display: grid;
  gap: 14px;
}

.compare-result-card {
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: #fbfbfb;
}

.compare-card-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 14px;
}

.compare-card-head h3 {
  margin-top: 6px;
  font-size: 20px;
  letter-spacing: -0.02em;
}

.compare-rank {
  display: inline-block;
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.compare-card-badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.compare-card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.compare-card-meta span {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 0 10px;
  border-radius: 999px;
  background: #f1f1f2;
  color: var(--text-sub);
  font-size: 12px;
}

.compare-result-metrics {
  margin-top: 16px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.compare-result-metric {
  padding: 12px;
  border-radius: 12px;
  background: #fff;
  border: 1px solid var(--border);
}

.compare-metric-label {
  display: block;
  color: var(--text-sub);
  font-size: 12px;
}

.compare-metric-value {
  display: block;
  margin-top: 6px;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.compare-notes {
  margin-top: 14px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.compare-note-block {
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #fff;
}

.compare-note-title {
  display: block;
  color: var(--text-sub);
  font-size: 12px;
}

.compare-note-text {
  display: block;
  margin-top: 6px;
  color: var(--text);
  font-size: 14px;
  line-height: 1.65;
  white-space: pre-wrap;
}

.contact-block-tools {
  display: grid;
  gap: 10px;
  max-width: 340px;
  margin: 0 auto 12px;
}

.contact-tool-link {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 16px;
  border: 1px solid var(--border);
  background: #f7f7f8;
  border-radius: var(--radius-md);
  color: var(--text);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.2s;
}

.contact-tool-link:hover {
  background: #efeff1;
  border-color: var(--text-sub);
}

/* 文章页响应式 */
@media (max-width: 640px) {
  .tools-grid,
  .products-grid,
  .services-grid {
    grid-template-columns: 1fr;
  }

  .tool-layout,
  .tool-form-grid {
    grid-template-columns: 1fr;
  }

  .project-input-grid,
  .compare-result-metrics,
  .compare-notes {
    grid-template-columns: 1fr;
  }

  .tool-title {
    font-size: 28px;
  }

  .tool-compare-head,
  .tool-compare-line {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .tool-compare-line span:nth-child(2),
  .tool-compare-line span:nth-child(3),
  .tool-compare-head span:nth-child(2),
  .tool-compare-head span:nth-child(3) {
    text-align: left;
  }

  .tool-cta-strip {
    padding: 18px 16px;
  }

  .project-card-input,
  .compare-result-card {
    padding: 16px;
  }

  .project-card-head,
  .compare-card-head {
    flex-direction: column;
  }

  .compare-card-badges {
    justify-content: flex-start;
  }

  .article-hero { padding: 20px 0 18px; }
  .article-title { font-size: 22px; }
  .article-subtitle { font-size: 14px; }
  .article-body { padding: 20px 0 40px; }
  .article-point { padding: 16px; }
  .point-body { padding-left: 0; margin-top: 10px; }
  .industry-card { padding: 16px; }
  .article-contact-block { padding: 22px 16px; }
  .contact-block-headline { font-size: 18px; }
}

}

/* Accessible disclosure toggle used by the total-cost tool */
.tool-toggle{border:0;background:transparent;font:inherit;color:var(--text-sub)}
.tool-toggle:focus-visible{outline:3px solid #165d50;outline-offset:3px}