/* ==========================================================================
   YunTech — 站点样式表
   参照 b2microtech.com 的配色与版式重新编写。
   结构约定沿用 wingcore，视觉为全新实现。
   ========================================================================== */

:root {
  --red: #e31c25;
  --red-dark: #b0141b;
  --ink: #0a0a0a;
  --ink-2: #161616;
  --ink-3: #222222;
  --line: #dfe2db;
  --gray-bg: #f2f2f2;
  --gray-text: #5c5c5c;
  --white: #ffffff;

  --shell: 1240px;
  --gutter: 24px;

  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-display: "Jost", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI",
    Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;

  --dots: radial-gradient(rgba(0, 0, 0, 0.09) 1px, transparent 1px);
  --dots-light: radial-gradient(rgba(255, 255, 255, 0.14) 1px, transparent 1px);
  --dots-size: 14px 14px;
}

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

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

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--ink-3);
  background: var(--white);
  overflow-x: hidden;
}

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

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

a:hover {
  text-decoration: underline;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  margin: 0;
  line-height: 1.1;
  letter-spacing: 0.01em;
  color: var(--ink);
}

p {
  margin: 0 0 1em;
}

:focus-visible {
  outline: 3px solid var(--red);
  outline-offset: 2px;
}

/* 导航是 sticky 的，锚点跳转要留出它的高度，否则标题会被压在导航下面 */
[id] {
  scroll-margin-top: 96px;
}

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

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* --------------------------------------------------------------------------
   Demo 提示条 — 内容全部为占位时提醒访客，正式上线前整块删除
   -------------------------------------------------------------------------- */

.demo-note {
  background: #ffd400;
  color: #1a1a1a;
  font-size: 13px;
  line-height: 1.5;
  padding: 10px 0;
}

.demo-note .container {
  display: flex;
  align-items: center;
  gap: 12px;
  justify-content: space-between;
}

.demo-note strong {
  font-weight: 700;
}

.demo-note button {
  flex: none;
  border: 0;
  background: rgba(0, 0, 0, 0.12);
  color: inherit;
  font: inherit;
  cursor: pointer;
  border-radius: 3px;
  padding: 2px 10px;
}

.demo-note button:hover {
  background: rgba(0, 0, 0, 0.24);
}

/* --------------------------------------------------------------------------
   顶部：红条 + 工具条 + 主导航
   -------------------------------------------------------------------------- */

.topline {
  height: 4px;
  background: var(--red);
}

.utility {
  background: var(--ink);
  color: rgba(255, 255, 255, 0.78);
  font-size: 13px;
  letter-spacing: 0.04em;
}

.utility .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 40px;
  flex-wrap: wrap;
}

.utility-left {
  display: flex;
  align-items: center;
  gap: 28px;
}

.utility a {
  color: rgba(255, 255, 255, 0.78);
}

.utility a:hover {
  color: var(--white);
  text-decoration: none;
}

.utility-rfq {
  color: var(--white) !important;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 600;
}

.utility-rfq:hover {
  color: var(--red) !important;
}

.topbar {
  background: var(--ink);
  position: sticky;
  top: 0;
  z-index: 40;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.topbar .nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 76px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  flex: none;
}

.brand:hover {
  text-decoration: none;
}

.brand svg {
  width: 40px;
  height: 40px;
  flex: none;
}

.brand-name {
  font-family: var(--font-display);
  color: var(--white);
  line-height: 1.05;
}

.brand-name strong {
  display: block;
  font-size: 25px;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.brand-name span {
  display: block;
  font-size: 10px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.6);
}

.menu {
  display: flex;
  align-items: center;
  gap: 30px;
}

.menu a {
  color: var(--white);
  font-size: 13.5px;
  font-weight: 500;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  padding: 6px 0;
  border-bottom: 2px solid transparent;
}

.menu a:hover {
  color: var(--red);
  text-decoration: none;
}

.menu a.active {
  color: var(--red);
  border-bottom-color: var(--red);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 0;
  background: transparent;
  cursor: pointer;
  padding: 10px;
  flex-direction: column;
  justify-content: space-between;
}

.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
}

/* 移动端抽屉 */

.nav-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  z-index: 60;
  display: none;
}

.nav-overlay.open {
  display: block;
}

.nav-drawer {
  position: absolute;
  top: 0;
  right: 0;
  width: min(340px, 86vw);
  height: 100%;
  background: var(--ink);
  padding: 20px;
  overflow-y: auto;
}

.nav-drawer .top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--white);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 12px;
  margin-bottom: 18px;
}

.nav-drawer .close {
  background: transparent;
  border: 0;
  color: var(--white);
  font-size: 28px;
  line-height: 1;
  cursor: pointer;
}

.nav-drawer a {
  display: block;
  padding: 14px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--white);
}

.nav-drawer a:hover {
  text-decoration: none;
  color: var(--red);
}

.nav-drawer a span {
  display: block;
}

.nav-drawer a .sub {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.5);
  text-transform: none;
  letter-spacing: 0;
}

/* --------------------------------------------------------------------------
   Hero
   -------------------------------------------------------------------------- */

.hero {
  position: relative;
  background: var(--ink);
  color: var(--white);
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  /* 占位视觉：黑到浅的横向渐变，正式版此处替换为实拍图 */
  background: linear-gradient(
    100deg,
    #050505 0%,
    #0d0d0d 34%,
    #3a3a3a 58%,
    #9a9a9a 78%,
    #e8e8e8 100%
  );
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: var(--dots-light);
  background-size: var(--dots-size);
  opacity: 0.5;
}

.hero .container {
  position: relative;
  z-index: 2;
  min-height: 520px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-top: 72px;
  padding-bottom: 72px;
}

.hero-copy {
  max-width: 780px;
}

.hero-kicker {
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 19px;
  font-weight: 500;
  margin-bottom: 10px;
}

.hero-kicker em {
  font-style: normal;
  color: var(--red);
  font-weight: 700;
}

.hero h1 {
  color: var(--white);
  font-size: clamp(36px, 5.6vw, 66px);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.005em;
  margin-bottom: 20px;
}

.hero h1 .accent {
  display: block;
  color: var(--red);
}

.hero-sub {
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: clamp(14px, 1.6vw, 18px);
  color: rgba(255, 255, 255, 0.92);
  margin-bottom: 30px;
}

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

/* 内页横幅 */

.page-hero {
  position: relative;
  background: var(--ink);
  color: var(--white);
  overflow: hidden;
}

.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, #050505 0%, #131313 45%, #4a4a4a 78%, #cfcfcf 100%);
}

.page-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: var(--dots-light);
  background-size: var(--dots-size);
  opacity: 0.45;
}

.page-hero .container {
  position: relative;
  z-index: 2;
  padding-top: 66px;
  padding-bottom: 66px;
}

.page-hero .kicker {
  color: var(--red);
}

.page-hero h1 {
  color: var(--white);
  font-size: clamp(32px, 4.6vw, 54px);
  font-weight: 600;
  text-transform: uppercase;
  margin-bottom: 14px;
}

.page-hero p {
  max-width: 720px;
  color: rgba(255, 255, 255, 0.86);
  margin: 0;
}

/* --------------------------------------------------------------------------
   按钮
   -------------------------------------------------------------------------- */

.btn {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 14px 26px;
  border: 2px solid var(--white);
  color: var(--white);
  background: transparent;
  cursor: pointer;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.btn:hover {
  text-decoration: none;
  background: var(--white);
  color: var(--ink);
}

.btn.primary {
  background: var(--red);
  border-color: var(--red);
  color: var(--white);
}

.btn.primary:hover {
  background: var(--red-dark);
  border-color: var(--red-dark);
  color: var(--white);
}

.btn.dark {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--white);
}

.btn.dark:hover {
  background: var(--white);
  color: var(--ink);
}

.btn.outline-dark {
  border-color: var(--ink);
  color: var(--ink);
}

.btn.outline-dark:hover {
  background: var(--ink);
  color: var(--white);
}

.btn.sm {
  padding: 10px 18px;
  font-size: 11.5px;
}

/* --------------------------------------------------------------------------
   区块骨架
   -------------------------------------------------------------------------- */

.section {
  padding: 74px 0;
  position: relative;
}

.section.dotted {
  background-color: var(--white);
  background-image: var(--dots);
  background-size: var(--dots-size);
}

.section.tight {
  padding: 52px 0;
}

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

.section-head {
  text-align: center;
  max-width: 900px;
  margin: 0 auto 34px;
}

/* 图标 SVG 用 currentColor 描边，颜色由所在容器决定 —— 红底上要转白，
   否则红图标压红底整个消失。 */
.brand svg,
.footer-brand svg {
  color: var(--red);
}

.section-head .mark {
  display: flex;
  justify-content: center;
  margin-bottom: 12px;
  color: var(--red);
}

.section-head .mark svg {
  width: 42px;
  height: 42px;
}

.kicker {
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 13px;
  font-weight: 500;
  color: var(--ink-3);
  margin-bottom: 4px;
}

.section-title {
  font-size: clamp(28px, 3.6vw, 42px);
  font-weight: 600;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.section-title .accent {
  color: var(--red);
}

.section-intro {
  color: var(--gray-text);
}

.lead {
  font-size: 17.5px;
  color: var(--ink-3);
}

/* --------------------------------------------------------------------------
   Mosaic 网格 — B2 首页的核心组件，三个板块复用
   一个整列的实心宣传块 + 四个图片卡片。
   变体：.mosaic--red / .mosaic--dark / .mosaic--light 控制实心块配色，
        .mosaic--right 把实心块移到右侧。
   -------------------------------------------------------------------------- */

.mosaic {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap: 4px;
  min-height: 620px;
}

/* 实心块与跨行卡片都显式定位。
   靠 order 或 auto-placement 都会让卡片先抢占格子，把实心块挤到中间。 */
.mosaic-panel {
  grid-column: 1;
  grid-row: 1 / span 2;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 44px 38px;
  position: relative;
  overflow: hidden;
}

.mosaic--right .mosaic-panel {
  grid-column: 3;
}

.mosaic--red .mosaic-panel {
  background: var(--red);
  color: var(--white);
}

.mosaic--dark .mosaic-panel {
  background: var(--ink);
  color: var(--white);
}

.mosaic--light .mosaic-panel {
  background: var(--gray-bg);
  color: var(--ink-3);
}

.mosaic-panel::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: var(--dots-light);
  background-size: var(--dots-size);
  opacity: 0.5;
  pointer-events: none;
}

.mosaic--light .mosaic-panel::after {
  background-image: var(--dots);
}

.mosaic-panel > * {
  position: relative;
  z-index: 1;
}

.mosaic-panel .mark {
  margin-bottom: 12px;
  color: var(--red);
}

/* 红底上红图标不可见，转白 */
.mosaic--red .mosaic-panel .mark {
  color: var(--white);
}

.mosaic-panel .mark svg {
  width: 40px;
  height: 40px;
}

.mosaic-panel .kicker {
  color: inherit;
  opacity: 0.9;
}

.mosaic-panel h2 {
  color: inherit;
  font-size: clamp(24px, 2.6vw, 33px);
  font-weight: 600;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.mosaic--red .mosaic-panel h2 .accent,
.mosaic--dark .mosaic-panel h2 .accent {
  color: var(--white);
  font-weight: 700;
}

.mosaic--dark .mosaic-panel h2 .accent {
  color: var(--red);
}

.mosaic--light .mosaic-panel h2 .accent {
  color: var(--red);
}

.mosaic-panel p {
  font-size: 15px;
  margin-bottom: 20px;
}

.mosaic-panel .btn {
  align-self: flex-start;
}

/* 卡片 —— 占位视觉用渐变色块，正式版此处换成实拍图 */

.mosaic-card {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 32px 30px;
  color: var(--white);
  overflow: hidden;
  min-height: 300px;
  text-decoration: none;
}

.mosaic-card:hover {
  text-decoration: none;
}

.mosaic-card .ph {
  position: absolute;
  inset: 0;
  background: linear-gradient(150deg, #2f3438 0%, #4b5257 55%, #23272a 100%);
  transition: transform 0.4s ease;
}

.mosaic-card:hover .ph {
  transform: scale(1.04);
}

.mosaic-card .ph::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(0, 0, 0, 0.15) 0%,
    rgba(0, 0, 0, 0.55) 62%,
    rgba(0, 0, 0, 0.78) 100%
  );
}

/* 占位色块的几种变体，避免整片一个颜色 */
.ph-a { background: linear-gradient(150deg, #232a30 0%, #46525c 60%, #1b2126 100%) !important; }
.ph-b { background: linear-gradient(150deg, #2c2622 0%, #574a41 60%, #201c19 100%) !important; }
.ph-c { background: linear-gradient(150deg, #1e2a26 0%, #3c5a4f 60%, #17201d 100%) !important; }
.ph-d { background: linear-gradient(150deg, #262230 0%, #4a4360 60%, #1c1922 100%) !important; }
.ph-e { background: linear-gradient(150deg, #2a2326 0%, #5b3f47 60%, #1f1a1c 100%) !important; }
.ph-f { background: linear-gradient(150deg, #1f272e 0%, #3f5668 60%, #171d22 100%) !important; }

.mosaic-card-body {
  position: relative;
  z-index: 1;
}

.mosaic-card h3 {
  color: var(--white);
  font-size: clamp(21px, 2.2vw, 29px);
  font-weight: 600;
  text-transform: uppercase;
  margin-bottom: 4px;
}

.mosaic-card .sub {
  display: block;
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.86);
  margin-bottom: 16px;
}

.mosaic-card .btn {
  border-width: 1px;
  padding: 9px 18px;
  font-size: 11px;
}

/* 只有三张卡片时，让最后一张占满右列（B2 的 Core Services 板块就是这个形态） */
.mosaic-card.span-rows {
  grid-column: 3;
  grid-row: 1 / span 2;
}

/* 占位标记 —— 让预览方一眼看出这里将来放图 */
.ph-tag {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 2;
  font-family: var(--font-display);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.72);
  border: 1px dashed rgba(255, 255, 255, 0.42);
  padding: 3px 8px;
  border-radius: 2px;
}

/* --------------------------------------------------------------------------
   提示条
   -------------------------------------------------------------------------- */

.notice {
  border-left: 4px solid var(--red);
  background: var(--gray-bg);
  padding: 16px 20px;
  font-size: 14.5px;
  color: var(--ink-3);
  margin-top: 24px;
}

.notice strong {
  font-weight: 700;
}

/* --------------------------------------------------------------------------
   通用列表 / 卡片 / 表格
   -------------------------------------------------------------------------- */

.grid {
  display: grid;
  gap: 24px;
}

.grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid.cols-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--white);
  border: 1px solid var(--line);
  padding: 28px 26px;
}

.card .num {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--red);
  margin-bottom: 8px;
}

.card h3 {
  font-size: 19px;
  font-weight: 600;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.card p:last-child {
  margin-bottom: 0;
}

.card ul {
  margin: 0;
  padding-left: 18px;
  color: var(--gray-text);
  font-size: 14.5px;
}

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 46px;
  align-items: center;
}

.split .ph-block {
  min-height: 340px;
  background: linear-gradient(150deg, #232a30 0%, #46525c 60%, #1b2126 100%);
  position: relative;
}

.split .ph-block .ph-tag {
  top: 14px;
  left: 14px;
}

/* 流程步骤 */

.steps {
  counter-reset: step;
  display: grid;
  gap: 2px;
}

.step {
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 24px;
  padding: 26px 0;
  border-top: 1px solid var(--line);
  align-items: start;
}

.step:last-child {
  border-bottom: 1px solid var(--line);
}

.step .idx {
  font-family: var(--font-display);
  font-size: 42px;
  font-weight: 600;
  color: var(--red);
  line-height: 1;
}

.step h3 {
  font-size: 19px;
  font-weight: 600;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.step p:last-child {
  margin-bottom: 0;
}

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

.cta-band {
  background: var(--red);
  color: var(--white);
  padding: 54px 0;
  position: relative;
  overflow: hidden;
}

.cta-band::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: var(--dots-light);
  background-size: var(--dots-size);
  opacity: 0.5;
}

.cta-band .container {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  flex-wrap: wrap;
}

.cta-band h2 {
  color: var(--white);
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 600;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.cta-band p {
  margin: 0;
  color: rgba(255, 255, 255, 0.92);
}

/* --------------------------------------------------------------------------
   表单
   -------------------------------------------------------------------------- */

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin-bottom: 18px;
}

.field label {
  display: block;
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 6px;
}

.field .req {
  color: var(--red);
}

.input,
textarea.input,
select.input {
  width: 100%;
  font-family: var(--font-sans);
  font-size: 15px;
  color: var(--ink-3);
  background: var(--white);
  border: 1px solid #c9ccc6;
  border-radius: 0;
  padding: 11px 13px;
}

.input:focus {
  border-color: var(--red);
  outline: none;
  box-shadow: 0 0 0 3px rgba(227, 28, 37, 0.14);
}

textarea.input {
  min-height: 190px;
  line-height: 1.6;
  resize: vertical;
}

.form-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.form-hint {
  font-size: 13.5px;
  color: var(--gray-text);
}

/* 联系方式块 */

.contact-points {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 2px;
  border: 1px solid var(--line);
}

.contact-point {
  padding: 22px 24px;
  border-right: 1px solid var(--line);
}

.contact-point:last-child {
  border-right: 0;
}

.contact-point strong {
  display: block;
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  color: var(--red);
  margin-bottom: 6px;
}

.copy-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.copy-btn {
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border: 1px solid var(--ink);
  background: transparent;
  color: var(--ink);
  padding: 5px 12px;
  cursor: pointer;
}

.copy-btn:hover {
  background: var(--ink);
  color: var(--white);
}

.copy-btn.done {
  border-color: var(--red);
  background: var(--red);
  color: var(--white);
}

/* --------------------------------------------------------------------------
   正文排版（合规页）
   -------------------------------------------------------------------------- */

.prose {
  max-width: 820px;
}

.prose h2 {
  font-size: 22px;
  font-weight: 600;
  text-transform: uppercase;
  margin: 34px 0 12px;
}

.prose h2:first-child {
  margin-top: 0;
}

.prose ul {
  padding-left: 20px;
  color: var(--ink-3);
}

.prose li {
  margin-bottom: 6px;
}

/* --------------------------------------------------------------------------
   页脚
   -------------------------------------------------------------------------- */

.site-footer {
  background: var(--ink);
  color: rgba(255, 255, 255, 0.72);
  padding: 58px 0 0;
  font-size: 14.5px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 36px;
}

.footer-brand svg {
  width: 44px;
  height: 44px;
  margin-bottom: 14px;
}

.footer-brand .co {
  color: var(--white);
  font-weight: 600;
  margin-bottom: 4px;
}

.footer-brand p {
  margin-bottom: 12px;
  line-height: 1.65;
}

.footer-brand a {
  color: rgba(255, 255, 255, 0.82);
}

.footer-col h4 {
  color: var(--red);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 14px;
}

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

.footer-col li {
  margin-bottom: 9px;
}

.footer-col a {
  color: rgba(255, 255, 255, 0.72);
}

.footer-col a:hover {
  color: var(--white);
  text-decoration: none;
}

.footer-bottom {
  margin-top: 44px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
}

.footer-bottom nav {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

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

/* --------------------------------------------------------------------------
   响应式
   -------------------------------------------------------------------------- */

@media (max-width: 1080px) {
  .mosaic {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto auto auto;
    min-height: 0;
  }

  .mosaic-panel,
  .mosaic--right .mosaic-panel {
    grid-column: 1 / -1;
    grid-row: auto;
    padding: 38px 30px;
  }

  .mosaic-card.span-rows {
    grid-column: auto;
    grid-row: auto;
  }

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

@media (max-width: 900px) {
  .menu {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .split {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .grid.cols-3,
  .grid.cols-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .utility-left {
    gap: 16px;
  }
}

@media (max-width: 680px) {
  .section {
    padding: 52px 0;
  }

  .hero .container {
    min-height: 420px;
  }

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

  .mosaic-panel,
  .mosaic--right .mosaic-panel {
    grid-column: 1;
  }

  .mosaic-card {
    min-height: 240px;
  }

  .grid.cols-2,
  .grid.cols-3,
  .grid.cols-4 {
    grid-template-columns: 1fr;
  }

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

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

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

  .step .idx {
    font-size: 32px;
  }

  .contact-point {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .contact-point:last-child {
    border-bottom: 0;
  }


  .utility .container {
    min-height: 0;
    padding-top: 8px;
    padding-bottom: 8px;
    justify-content: center;
    text-align: center;
  }

  .utility-left {
    flex-direction: column;
    gap: 2px;
  }
}

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

  .mosaic-card .ph {
    transition: none;
  }
}