/* 真途智造官网：公共布局、组件与响应式样式。 */
*,
*::before,
*::after {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  font-family:
    'Microsoft YaHei', '微软雅黑', 'PingFang SC', 'Hiragino Sans GB', 'Helvetica Neue', Helvetica,
    Arial, system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
}

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

h1,
h2,
h3,
h4,
p {
  margin: 0;
}

:root {
  --ink: #0a1b2f;

  --accent: #0b3a80;
  --accent-2: #1e63c8;
  --accent-3: #3d8bee;

  --bg: #ffffff;
  --paper: #f5f8fc;
  --paper-2: #edf3fb;
  --line: #e3e9f2;

  --text: #17222f;
  --muted: #6b7a8d;

  --shadow-sm: 0 1px 2px rgba(10, 27, 47, 0.05), 0 4px 14px rgba(10, 27, 47, 0.05);
  --shadow-md: 0 10px 34px rgba(10, 27, 47, 0.1);
  --shadow-lg: 0 26px 70px rgba(10, 27, 47, 0.18);
  --shadow-blue: 0 12px 30px rgba(11, 58, 128, 0.26);

  --r: 14px;
  --r-lg: 22px;
  --wrap: 1200px;
  --nav-h: 74px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 28px;
}

.section {
  padding: 44px 0;
  position: relative;
}

.section--tight {
  padding: 30px 0;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}

.eyebrow::before {
  content: '';
  width: 26px;
  height: 2px;
  background: var(--accent);
  display: block;
}

.h-section {
  font-size: clamp(22px, 2.6vw, 30px);
  line-height: 1.26;
  font-weight: 800;
  letter-spacing: -0.01em;
  margin-bottom: 12px;
  color: var(--ink);
}

.lead {
  font-size: 15.5px;
  color: var(--muted);
  max-width: 720px;
}

.section-head {
  margin-bottom: 24px;
  text-align: left;
}

.section-head .eyebrow {
  justify-content: flex-start;
}

.section-head .lead {
  margin-left: 0;
  margin-right: 0;
}

.section-head--wide .lead {
  max-width: none;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 15px 30px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: all 0.28s var(--ease);
  white-space: nowrap;
}

.btn svg {
  width: 16px;
  height: 16px;
  transition: transform 0.28s var(--ease);
}

.btn:hover svg {
  transform: translateX(4px);
}

.btn--primary {
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  color: #fff;
  box-shadow: var(--shadow-blue);
}

.btn--primary:hover {
  box-shadow: 0 16px 38px rgba(11, 58, 128, 0.36);
  transform: translateY(-2px);
}

.btn--ghost {
  border-color: rgba(255, 255, 255, 0.34);
  color: #fff;
}

.btn--ghost:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.62);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 900;
  min-height: var(--nav-h);
  display: flex;
  align-items: center;
  padding: 6px 0;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: saturate(180%) blur(10px);
  -webkit-backdrop-filter: saturate(180%) blur(10px);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px 28px;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand__text {
  display: flex;
  flex-direction: row;
  align-items: baseline;
  gap: 10px;
  line-height: 1.1;
}

.brand__name {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--ink);
}

.brand__sub {
  font-size: 11px;
  letter-spacing: 0.26em;
  color: var(--muted);
  text-transform: uppercase;
  border-left: 1px solid var(--line);
  padding-left: 10px;
}

.nav {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  align-items: center;
  justify-content: space-evenly;
  gap: 2px;
  row-gap: 2px;
  flex-wrap: wrap;
}

.nav a {
  position: relative;
  padding: 10px 16px;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 600;
  color: #46586d;
  white-space: nowrap;
  transition:
    color 0.22s,
    background 0.22s;
}

.nav a:hover {
  color: var(--ink);
  background: var(--paper);
}

.nav a.is-active {
  color: var(--accent);
}

.nav a.is-active::after {
  content: '';
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 2px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}

.banner {
  position: relative;
  display: grid;
  align-items: center;
  min-height: 330px;
  background: var(--ink);
}

.banner__image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.banner::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    100deg,
    rgba(6, 14, 25, 0.92),
    rgba(7, 17, 31, 0.74) 42%,
    rgba(10, 22, 38, 0.34)
  );
}

.banner__content {
  position: relative;
  z-index: 1;
  padding-top: 48px;
  padding-bottom: 48px;
  color: #fff;
}

.banner__content h1 {
  font-size: clamp(26px, 3.4vw, 42px);
  line-height: 1.25;
  font-weight: 800;
  margin-bottom: 14px;
}

.banner__content p {
  max-width: 560px;
  font-size: 16px;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 24px;
}

.biz {
  display: block;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r);
  overflow: hidden;
  transition: all 0.32s var(--ease);
}

.biz:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: transparent;
}

.biz__img {
  display: block;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--ink);
}

.biz__img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.7s var(--ease);
}

.biz:hover .biz__img img {
  transform: scale(1.05);
}

.biz__body {
  display: block;
  padding: 20px 22px 24px;
}

.biz__body h3 {
  font-size: 18px;
  font-weight: 800;
  color: var(--ink);
  margin-bottom: 8px;
}

.grid {
  display: grid;
  gap: 16px;
}

.grid--2 {
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 290px), 1fr));
}

.grid--3 {
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 250px), 1fr));
}

.grid--4 {
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 228px), 1fr));
}

.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r);
  padding: 22px 20px;
  transition: all 0.32s var(--ease);
  position: relative;
  overflow: hidden;
}

.card::after {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  height: 3px;
  width: 0;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transition: width 0.38s var(--ease);
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: transparent;
}

.card:hover::after {
  width: 100%;
}

.card h3 {
  font-size: 17.5px;
  font-weight: 800;
  margin-bottom: 9px;
  color: var(--ink);
}

.card p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.7;
}

.card__icon {
  width: 44px;
  height: 44px;
  border-radius: 11px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, rgba(11, 58, 128, 0.1), rgba(30, 99, 200, 0.05));
  color: var(--accent);
  margin-bottom: 16px;
}

.card__icon svg {
  width: 21px;
  height: 21px;
}

.feature {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 330px), 1fr));
  gap: 40px;
  align-items: center;
}

.feature--flip .feature__media {
  order: 2;
}

.feature__media {
  position: relative;
  border-radius: var(--r-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  aspect-ratio: 3 / 2;
  background: var(--ink);
}

.feature__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s var(--ease);
}

.feature:hover .feature__media img {
  transform: scale(1.045);
}

.feature__media::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(200deg, transparent 52%, rgba(10, 27, 47, 0.4));
}

.feature__body h3 {
  font-size: clamp(20px, 2.1vw, 26px);
  font-weight: 800;
  margin-bottom: 12px;
  line-height: 1.3;
  color: var(--ink);
}

.feature__body > p {
  color: var(--muted);
  margin-bottom: 20px;
  font-size: 15px;
}

.feature__list {
  display: grid;
  gap: 10px;
}

.feature__list li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: 14.5px;
  color: #2c3a4c;
}

.feature__list li svg {
  width: 18px;
  height: 18px;
  color: var(--accent);
  flex: none;
  margin-top: 4px;
}

.stack {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 198px), 1fr));
  gap: 12px;
}

.layer {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  align-items: start;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r);
  padding: 18px 16px;
  transition: all 0.3s var(--ease);
}

.layer:hover {
  border-color: rgba(11, 58, 128, 0.45);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.layer__no {
  font-size: 11.5px;
  font-weight: 800;
  letter-spacing: 0.14em;
  color: var(--accent);
  display: flex;
  align-items: center;
  gap: 7px;
}

.layer__no b {
  font-size: 17px;
  color: #c3d0e2;
  letter-spacing: 0;
}

.layer__title {
  font-size: 15px;
  font-weight: 800;
  color: var(--ink);
  margin: 8px 0 12px;
  line-height: 1.4;
}

.layer__items {
  display: grid;
  gap: 5px;
}

.layer__items span {
  font-size: 12px;
  padding: 5px 9px;
  border-radius: 6px;
  background: var(--paper);
  border: 1px solid var(--line);
  color: #3b4a5c;
}

.layer__items span i {
  color: var(--accent-2);
  font-style: normal;
  margin-right: 6px;
}

.scene-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 212px), 1fr));
  gap: 14px;
}

.scene {
  padding: 20px 20px;
  border-radius: var(--r);
  background: #fff;
  border: 1px solid var(--line);
  transition: all 0.3s var(--ease);
  position: relative;
  overflow: hidden;
}

.scene::after {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  height: 3px;
  width: 0;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transition: width 0.38s var(--ease);
}

.scene:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: transparent;
}

.scene:hover::after {
  width: 100%;
}

.scene__no {
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.16em;
  color: var(--accent);
}

.scene h4 {
  font-size: 16px;
  font-weight: 800;
  margin: 8px 0 6px;
  color: var(--ink);
}

.scene p {
  font-size: 13px;
  color: var(--muted);
}

.tagcloud {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
}

.tagcloud span {
  padding: 7px 16px;
  border-radius: 999px;
  font-size: 13.5px;
  font-weight: 600;
  background: var(--paper);
  border: 1px solid var(--line);
  color: #3b4a5c;
  transition: all 0.25s var(--ease);
}

.tagcloud span:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  transform: translateY(-2px);
}

.cta-band {
  position: relative;
  overflow: hidden;
  border-radius: var(--r-lg);
  background: linear-gradient(120deg, #071b36 0%, var(--accent) 58%, #1a5fb8 100%);
  color: #fff;
  padding: 34px 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
  box-shadow: 0 30px 70px rgba(10, 27, 47, 0.22);
}

.cta-band::before {
  content: '';
  position: absolute;
  right: -90px;
  top: -90px;
  width: 380px;
  height: 380px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(61, 139, 238, 0.42), transparent 68%);
}

.cta-band::after {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0.28;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.08) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(90deg, transparent, #000);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000);
}

.cta-band > * {
  position: relative;
  z-index: 1;
}

.cta-band h2 {
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 10px;
}

.cta-band p {
  color: rgba(255, 255, 255, 0.74);
}

.page-hero {
  position: relative;
  padding: 30px 0 28px;
  background: linear-gradient(180deg, var(--paper-2) 0%, #ffffff 100%);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0.55;
  background-image:
    linear-gradient(rgba(11, 58, 128, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(11, 58, 128, 0.06) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(70% 100% at 84% 12%, #000, transparent 74%);
  -webkit-mask-image: radial-gradient(70% 100% at 84% 12%, #000, transparent 74%);
}

.page-hero::after {
  content: '';
  position: absolute;
  right: -140px;
  top: -140px;
  width: 520px;
  height: 520px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(30, 99, 200, 0.16), transparent 66%);
}

.page-hero .wrap {
  position: relative;
  z-index: 1;
}

.page-hero h1 {
  font-size: clamp(26px, 3.2vw, 38px);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.015em;
  color: var(--ink);
}

.page-hero h1 em {
  display: block;
  font-style: normal;
  margin-top: 7px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  opacity: 0.8;
}

.page-hero p {
  margin-top: 12px;
  font-size: 15.5px;
  color: var(--muted);
  max-width: 680px;
}

.crumb {
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin-bottom: 12px;
}

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

.crumb span {
  color: var(--accent);
}

.wrap--narrow {
  max-width: 760px;
}

.form__head {
  margin-bottom: 20px;
}

.form__head h3 {
  font-size: 22px;
  font-weight: 800;
  color: var(--ink);
  margin-bottom: 6px;
  letter-spacing: -0.01em;
}

.form__head p {
  margin: 0;
  font-size: 14px;
  color: var(--muted);
}

.form__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 250px), 1fr));
  gap: 0 18px;
}

.form__head + .form__grid .field:first-child {
  grid-column: auto;
}

.form {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 32px;
  box-shadow: var(--shadow-md);
}

.field {
  margin-bottom: 16px;
}

.field label {
  display: block;
  font-size: 13.5px;
  font-weight: 700;
  margin-bottom: 8px;
  color: #33445a;
}

.field__label-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 6px 12px;
  margin-bottom: 8px;
}

.field__label-row > label {
  margin-bottom: 0;
}

.field label.field__check {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12.5px;
  font-weight: 400;
  cursor: pointer;
}

.field__check input {
  width: 16px;
  height: 16px;
  margin: 0;
  flex-shrink: 0;
  accent-color: var(--accent);
}

.field input:not([type='checkbox']),
.field textarea,
.field select {
  min-width: 0;
  width: 100%;
  padding: 13px 16px;
  border: 1px solid var(--line);
  border-radius: 10px;
  font-size: 15px;
  font-family: inherit;
  color: var(--text);
  background: var(--paper);
  transition:
    border-color 0.2s,
    background 0.2s;
}

.field input:not([type='checkbox']):focus,
.field textarea:focus,
.field select:focus {
  outline: none;
  border-color: var(--accent);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(11, 58, 128, 0.12);
}

.field textarea {
  resize: vertical;
  min-height: 130px;
}

.form-note {
  font-size: 12.5px;
  color: var(--muted);
  margin-top: 14px;
}

.split {
  display: grid;
  grid-template-columns: 236px minmax(0, 1fr);
  gap: 40px;
  align-items: start;
}

.split__nav {
  position: sticky;
  top: calc(var(--nav-h) + 18px);
}

.split__title {
  font-size: 19px;
  font-weight: 800;
  color: var(--ink);
  line-height: 1.3;
  padding-bottom: 13px;
  margin-bottom: 12px;
  border-bottom: 2px solid var(--ink);
}

.split__title span {
  display: block;
  margin-top: 5px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.split__nav ul {
  display: grid;
  gap: 2px;
}

.split__nav a {
  display: block;
  padding: 11px 14px;
  border-radius: 8px;
  border-left: 3px solid transparent;
  font-size: 14.5px;
  font-weight: 600;
  color: #46586d;
  transition:
    color 0.22s var(--ease),
    background 0.22s var(--ease),
    border-color 0.22s var(--ease);
}

.split__nav a b {
  display: block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-bottom: 2px;
}

.split__nav a:hover {
  color: var(--ink);
  background: var(--paper);
}

.split__nav a.is-active {
  color: var(--accent);
  background: var(--paper-2);
  border-left-color: var(--accent);
  font-weight: 800;
}

.split__nav a.is-active b {
  color: var(--accent-2);
}

.split__body {
  min-width: 0;
}

.pane {
  display: none;
}

.pane.is-active {
  display: block;
}

@media (prefers-reduced-motion: reduce) {
  .pane.is-active {
    animation: none;
  }
}

.about-block {
  padding-top: 22px;
  scroll-margin-top: 90px;
}

.team-band {
  padding: 22px 26px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--paper);
}

.team-band p {
  margin: 0 0 12px;
  font-size: 14.5px;
  line-height: 1.85;
  color: #33445a;
}

.pane .section-head:first-child {
  margin-top: 0;
}

.subhead {
  font-size: 15px;
  font-weight: 800;
  color: var(--ink);
  margin-bottom: 12px;
}

[data-tagblock] {
  margin-top: 22px;
}

.arch-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 190px), 1fr));
  gap: 12px;
}

.arch-strip__item {
  display: grid;
  gap: 5px;
  padding: 15px 17px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 12px;
  transition: all 0.25s var(--ease);
}

.arch-strip__item b {
  font-size: 12.5px;
  font-weight: 800;
  letter-spacing: 0.12em;
  color: var(--accent-2);
}

.arch-strip__item span {
  font-size: 19px;
  font-weight: 800;
  color: var(--ink);
}

.arch-strip__item i {
  font-style: normal;
  font-size: 12.5px;
  color: var(--muted);
  line-height: 1.6;
}

.arch-strip__item:hover {
  background: #fff;
  border-color: rgba(11, 58, 128, 0.4);
  transform: translateY(-4px);
  box-shadow: var(--shadow-sm);
}

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

.stack--rows .layer {
  grid-template-columns: 104px minmax(0, 1fr);
  gap: 14px;
  align-items: center;
  padding: 12px 18px;
}

.stack--rows .layer > div:not(.layer__no) {
  display: grid;
  grid-template-columns: minmax(120px, 0.7fr) minmax(0, 1fr);
  gap: 18px;
  align-items: center;
}

.stack--rows .layer__no {
  flex-direction: column;
  align-items: flex-start;
  gap: 0;
  line-height: 1.2;
}

.stack--rows .layer__title {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.5;
}

.stack--rows .layer__items {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

@media (max-width: 700px) {
  .stack--rows .layer {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .stack--rows .layer > div:not(.layer__no) {
    grid-template-columns: 1fr;
    gap: 8px;
  }

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

.biz--mini .biz__img {
  aspect-ratio: 16 / 9;
}

.biz--mini .biz__body {
  padding: 14px 18px 16px;
}

.biz--mini .biz__body h3 {
  font-size: 16.5px;
  margin-bottom: 4px;
}

.biz--mini .biz__sub {
  font-size: 12.5px;
  color: var(--muted);
}

@media (max-width: 1080px) {
  .nav a {
    padding: 9px 13px;
    font-size: 15px;
  }
}

@media (max-width: 900px) {
  .nav a {
    padding: 8px 12px;
    font-size: 14.5px;
  }

  .brand__name {
    font-size: 19px;
  }

  .brand__sub {
    font-size: 10px;
    letter-spacing: 0.24em;
  }

  .section {
    padding: 38px 0;
  }

  .section--tight {
    padding: 26px 0;
  }

  .cta-band {
    padding: 30px 24px;
  }

  .wrap {
    padding: 0 22px;
  }

  .split {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .split__nav {
    position: static;
  }

  .split__title {
    border-bottom: 0;
    padding-bottom: 0;
    margin-bottom: 12px;
    font-size: 17px;
  }

  .split__nav ul {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
  }

  .split__nav a {
    border: 1px solid var(--line);
    border-radius: 999px;
    padding: 9px 16px;
    font-size: 13.5px;
    background: #fff;
  }

  .split__nav a b {
    display: none;
  }

  .split__nav a.is-active {
    border-color: transparent;
    color: #fff;
    background: linear-gradient(120deg, var(--accent), var(--accent-2));
  }
}

@media (max-width: 760px) {
  .feature {
    gap: 24px;
  }

  .feature--flip .feature__media {
    order: 0;
  }
}

@media (max-width: 620px) {
  .wrap {
    padding: 0 18px;
  }

  .site-header {
    padding: 8px 0;
  }

  .form {
    padding: 24px 20px;
  }

  .card {
    padding: 18px 16px;
  }

  .biz__body {
    padding: 15px 16px 18px;
  }

  .scene {
    padding: 17px 15px;
  }

  .cta-band {
    padding: 26px 20px;
  }
}

@media (max-width: 430px) {
  .grid--2,
  .grid--3,
  .grid--4,
  .scene-grid,
  .stack {
    grid-template-columns: 1fr;
  }
}

.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 230px), 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
}

.step {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 18px 24px;
  background: var(--paper);
}

.step b {
  display: block;
  font-size: 16px;
  line-height: 1;
  font-weight: 800;
  letter-spacing: 0.1em;
  color: var(--accent-2);
  margin-bottom: 10px;
}

.step h4 {
  font-size: 16.5px;
  font-weight: 800;
  color: var(--ink);
  margin: 0 0 8px;
}

.step p {
  font-size: 13.5px;
  color: var(--muted);
  line-height: 1.7;
  margin: 0;
}

/* 交互状态与共享布局 */
[hidden] {
  display: none !important;
}
a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--accent-3);
  outline-offset: 4px;
}
.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.btn:disabled {
  cursor: wait;
  opacity: 0.65;
  transform: none;
}
.form__fields {
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 0;
}
.form__submit {
  width: 100%;
  justify-content: center;
}
.form-status {
  margin-top: 18px;
  padding: 14px 18px;
  border: 1px solid;
  border-radius: 10px;
  font-size: 14px;
}
.form-status--success {
  background: #edf8f0;
  border-color: #a6d7b2;
  color: #1e7036;
}
.form-status--error {
  background: #fff1f0;
  border-color: #edb4af;
  color: #9b2820;
}

@media (max-width: 620px) {
  .site-header .wrap {
    gap: 8px;
  }
  .nav {
    flex-basis: 100%;
    flex-wrap: nowrap;
    gap: 2px;
  }
  .nav a {
    flex: 1;
    padding: 8px 2px;
    font-size: 12.5px;
    text-align: center;
  }
  .nav a.is-active::after {
    left: 8px;
    right: 8px;
  }
  .banner__content {
    padding-top: 36px;
    padding-bottom: 36px;
  }
  .banner__content p {
    font-size: 14.5px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    transition: none !important;
  }
}