/* =====================================================================
   瞬维智能科技（义乌）有限公司 — 官网样式
   风格：简约大气 / 深色 Hero + 浅色内容区 / 宝蓝 + 青蓝点缀
   ===================================================================== */

:root {
  --brand: #2456e6;
  --brand-deep: #1739a8;
  --brand-soft: #ecf1ff;
  --accent: #12b8d9;

  --ink-900: #0a1224;
  --ink-800: #141f36;
  --ink-700: #24314d;
  --ink-600: #3d4a63;
  --ink-400: #6b7891;
  --ink-300: #97a1b5;

  --line: #e7ebf3;
  --line-soft: #f0f3f9;
  --bg: #ffffff;
  --bg-soft: #f6f8fc;
  --bg-dark: #060d1c;

  --radius: 16px;
  --radius-sm: 10px;
  --shadow-sm: 0 2px 8px rgba(15, 30, 70, 0.05);
  --shadow: 0 10px 34px rgba(15, 30, 70, 0.08);
  --shadow-lg: 0 22px 60px rgba(15, 30, 70, 0.14);

  --container: 1200px;
  --header-h: 72px;

  --font: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", system-ui,
    -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font);
  color: var(--ink-700);
  background: var(--bg);
  font-size: 15px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

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

button,
input,
textarea,
select {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

::selection {
  background: rgba(36, 86, 230, 0.16);
}

/* ------------------------------- 布局 ------------------------------- */

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

.section {
  padding: 96px 0;
}

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

.section--tight {
  padding: 72px 0;
}

/* ------------------------------ 页头导航 ---------------------------- */

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--header-h);
  z-index: 100;
  display: flex;
  align-items: center;
  transition: background 0.35s ease, box-shadow 0.35s ease,
    border-color 0.35s ease;
  border-bottom: 1px solid transparent;
}

.site-header.is-solid {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom-color: var(--line);
  box-shadow: 0 4px 22px rgba(15, 30, 70, 0.05);
}

.site-header .container {
  display: flex;
  align-items: center;
  gap: 40px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  flex-shrink: 0;
}

/* 官方品牌标识（彩色横版 logo，透明底）：浅色背景用彩色原版 */
.brand__logo {
  display: block;
  height: 48px;
  width: auto;
  flex-shrink: 0;
}

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.18;
}

.brand__sub {
  font-size: 10.5px;
  letter-spacing: 0.16em;
  color: var(--ink-300);
  text-transform: uppercase;
}

.nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}

.nav a {
  position: relative;
  padding: 8px 15px;
  border-radius: 9px;
  font-size: 14.5px;
  font-weight: 500;
  color: var(--ink-600);
  transition: color 0.2s, background 0.2s;
  white-space: nowrap;
}

.nav a:hover {
  color: var(--brand);
  background: var(--brand-soft);
}

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

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

/* 深色 Hero 上的顶部导航（未滚动时） */
.site-header.is-transparent .nav a {
  color: rgba(255, 255, 255, 0.88);
}
/* 首页首屏：logo 始终保持品牌原有彩色。
   首屏底色偏亮蓝会把 logo 的蓝色吃掉，故用白色圆角衬底承载，让原色完整呈现 */
.site-header.is-transparent .brand__logo {
  filter: none;
  background: #fff;
  padding: 5px 11px;
  border-radius: 12px;
  box-shadow: 0 8px 22px rgba(3, 10, 26, 0.3);
}
.site-header.is-transparent .brand__sub {
  color: rgba(255, 255, 255, 0.45);
}
.site-header.is-transparent .nav a:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
}
.site-header.is-transparent .nav a.is-active {
  color: #fff;
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  cursor: pointer;
  place-items: center;
}

.nav-toggle span {
  display: block;
  width: 17px;
  height: 1.6px;
  background: var(--ink-800);
  margin: 3.5px auto;
  border-radius: 2px;
  transition: 0.25s;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  border-radius: 10px;
  font-size: 14.5px;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.22s ease, background 0.22s,
    color 0.22s, border-color 0.22s;
  white-space: nowrap;
  line-height: 1.5;
}

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

.btn--primary {
  background: var(--brand);
  color: #fff;
  box-shadow: 0 10px 26px rgba(36, 86, 230, 0.28);
}

.btn--primary:hover {
  background: var(--brand-deep);
  box-shadow: 0 14px 32px rgba(36, 86, 230, 0.34);
}

.btn--ghost {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.26);
}

.btn--ghost:hover {
  background: rgba(255, 255, 255, 0.16);
  border-color: rgba(255, 255, 255, 0.45);
}

.btn--outline {
  background: #fff;
  color: var(--ink-800);
  border-color: var(--line);
}

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

.btn--sm {
  padding: 9px 18px;
  font-size: 13.5px;
}

.btn--block {
  width: 100%;
}

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

.hero {
  position: relative;
  padding: calc(var(--header-h) + 92px) 0 96px;
  background: var(--bg-dark);
  color: #fff;
  overflow: hidden;
  isolation: isolate;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
      900px 480px at 78% -8%,
      rgba(18, 184, 217, 0.32),
      transparent 62%
    ),
    radial-gradient(760px 460px at 12% 8%, rgba(36, 86, 230, 0.38), transparent 66%),
    linear-gradient(180deg, #060d1c 0%, #0a1730 62%, #0c1c38 100%);
  z-index: -2;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(
      rgba(255, 255, 255, 0.045) 1px,
      transparent 1px
    ),
    linear-gradient(90deg, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
  background-size: 62px 62px;
  mask-image: radial-gradient(ellipse 78% 62% at 50% 34%, #000 42%, transparent 100%);
  -webkit-mask-image: radial-gradient(
    ellipse 78% 62% at 50% 34%,
    #000 42%,
    transparent 100%
  );
  z-index: -1;
}

.hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
  gap: 64px;
  align-items: center;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 7px 16px 7px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.14);
  font-size: 13px;
  color: rgba(255, 255, 255, 0.86);
  letter-spacing: 0.01em;
}

.badge__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #38e0a0;
  box-shadow: 0 0 0 4px rgba(56, 224, 160, 0.16);
}

.hero h1 {
  margin: 26px 0 0;
  font-size: clamp(34px, 4.4vw, 58px);
  line-height: 1.16;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.hero h1 .accent {
  display: block;
  background: linear-gradient(96deg, #6fa6ff 0%, #3fd8ec 62%, #8ef0d8 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero__sub {
  margin-top: 24px;
  font-size: 16.5px;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.72);
  max-width: 30em;
}

.hero__actions {
  margin-top: 38px;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.hero__meta {
  margin-top: 34px;
  display: flex;
  flex-wrap: wrap;
  gap: 26px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.55);
}

.hero__meta span {
  display: flex;
  align-items: center;
  gap: 7px;
}

.hero__meta svg {
  width: 15px;
  height: 15px;
  opacity: 0.75;
}

/* Hero 右侧：能力卡片堆叠 */
.hero-panel {
  position: relative;
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: linear-gradient(
    160deg,
    rgba(255, 255, 255, 0.1) 0%,
    rgba(255, 255, 255, 0.035) 100%
  );
  backdrop-filter: blur(10px);
  padding: 10px;
  box-shadow: 0 30px 70px rgba(0, 0, 0, 0.36);
}

.hero-panel__head {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 12px 14px 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.09);
  font-size: 12.5px;
  color: rgba(255, 255, 255, 0.62);
  letter-spacing: 0.03em;
}

.hero-panel__dots {
  display: flex;
  gap: 5px;
}
.hero-panel__dots i {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
}
.hero-panel__dots i:first-child {
  background: #ff6b6b;
}
.hero-panel__dots i:nth-child(2) {
  background: #ffc14d;
}
.hero-panel__dots i:nth-child(3) {
  background: #38e0a0;
}

.hero-panel__body {
  padding: 16px;
  display: grid;
  gap: 10px;
}

.pipe-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.055);
  border: 1px solid rgba(255, 255, 255, 0.07);
  animation: pipeIn 0.6s both;
}

.pipe-row:nth-child(1) { animation-delay: 0.05s; }
.pipe-row:nth-child(2) { animation-delay: 0.16s; }
.pipe-row:nth-child(3) { animation-delay: 0.27s; }
.pipe-row:nth-child(4) { animation-delay: 0.38s; }

@keyframes pipeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.pipe-row__ico {
  width: 32px;
  height: 32px;
  border-radius: 9px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, rgba(36, 86, 230, 0.9), rgba(18, 184, 217, 0.9));
  flex-shrink: 0;
}
.pipe-row__ico svg {
  width: 16px;
  height: 16px;
}

.pipe-row__t {
  font-size: 13.5px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.93);
  line-height: 1.4;
}
.pipe-row__d {
  font-size: 11.5px;
  color: rgba(255, 255, 255, 0.5);
  line-height: 1.5;
}

.pipe-row__val {
  margin-left: auto;
  font-size: 12px;
  font-weight: 700;
  color: #3fd8ec;
  white-space: nowrap;
}

/* ------------------------------ 数据条 ------------------------------ */

.stats-bar {
  position: relative;
  margin-top: -1px;
  background: #0a1730;
  border-top: 1px solid rgba(255, 255, 255, 0.07);
}

.stats-bar__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.stat {
  padding: 40px 24px;
  text-align: center;
  border-right: 1px solid rgba(255, 255, 255, 0.07);
}

.stat:last-child {
  border-right: none;
}

.stat__num {
  font-size: clamp(28px, 3vw, 40px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
  background: linear-gradient(120deg, #ffffff 20%, #7fe3f2 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.stat__label {
  margin-top: 9px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
  letter-spacing: 0.03em;
}

/* ----------------------------- 标题组件 ----------------------------- */

.sec-head {
  max-width: 760px;
}

.sec-head--center {
  margin: 0 auto;
  text-align: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--brand);
  text-transform: uppercase;
}

.eyebrow::before {
  content: "";
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--brand), var(--accent));
}

.sec-head--center .eyebrow::before {
  display: none;
}

.sec-title {
  margin-top: 14px;
  font-size: clamp(25px, 3vw, 37px);
  line-height: 1.3;
  font-weight: 800;
  color: var(--ink-900);
  letter-spacing: -0.015em;
}

.sec-desc {
  margin-top: 16px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ink-400);
}

/* ----------------------------- 产品服务卡 --------------------------- */

.svc-grid {
  margin-top: 56px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.svc-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 30px 28px 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  transition: transform 0.28s cubic-bezier(0.2, 0.7, 0.3, 1), box-shadow 0.28s,
    border-color 0.28s;
  overflow: hidden;
}

.svc-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--brand), var(--accent));
  opacity: 0;
  transition: opacity 0.28s;
}

.svc-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(36, 86, 230, 0.24);
}

.svc-card:hover::before {
  opacity: 1;
}

.svc-card__ico {
  width: 46px;
  height: 46px;
  border-radius: 13px;
  display: grid;
  place-items: center;
  background: var(--brand-soft);
  color: var(--brand);
  margin-bottom: 20px;
  transition: background 0.28s, color 0.28s;
}

.svc-card:hover .svc-card__ico {
  background: linear-gradient(135deg, var(--brand), var(--accent));
  color: #fff;
}

.svc-card__ico svg {
  width: 23px;
  height: 23px;
}

.svc-card__tag {
  display: inline-block;
  align-self: flex-start;
  padding: 3px 11px;
  border-radius: 999px;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--brand);
  background: var(--brand-soft);
  margin-bottom: 12px;
}

.svc-card h3 {
  font-size: 18.5px;
  font-weight: 700;
  color: var(--ink-900);
  letter-spacing: -0.005em;
}

.svc-card__sub {
  margin-top: 7px;
  font-size: 13px;
  color: var(--accent);
  font-weight: 600;
}

.svc-card__desc {
  margin-top: 14px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-400);
  flex: 1;
}

.svc-card__metrics {
  margin-top: 20px;
  padding-top: 18px;
  border-top: 1px dashed var(--line);
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.svc-metric b {
  display: block;
  font-size: 17px;
  font-weight: 800;
  color: var(--brand);
  letter-spacing: -0.01em;
}

.svc-metric span {
  font-size: 11.5px;
  color: var(--ink-300);
}

.svc-card__link {
  margin-top: 20px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--brand);
}

.svc-card__link svg {
  width: 14px;
  height: 14px;
  transition: transform 0.24s;
}

.svc-card:hover .svc-card__link svg {
  transform: translateX(4px);
}

/* ------------------------------ 优势网格 ---------------------------- */

.adv-grid {
  margin-top: 56px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.adv-card {
  padding: 30px 26px;
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid var(--line);
  transition: transform 0.28s, box-shadow 0.28s;
}

.adv-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow);
}

.adv-card__ico {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, rgba(36, 86, 230, 0.1), rgba(18, 184, 217, 0.14));
  color: var(--brand);
  margin-bottom: 18px;
}

.adv-card__ico svg {
  width: 22px;
  height: 22px;
}

.adv-card h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--ink-900);
  margin-bottom: 14px;
}

.adv-list {
  list-style: none;
  display: grid;
  gap: 10px;
}

.adv-list li {
  position: relative;
  padding-left: 22px;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--ink-600);
}

.adv-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--brand-soft);
}

.adv-list li::after {
  content: "";
  position: absolute;
  left: 3.6px;
  top: 11.4px;
  width: 5.5px;
  height: 3px;
  border-left: 1.7px solid var(--brand);
  border-bottom: 1.7px solid var(--brand);
  transform: rotate(-45deg);
}

/* ------------------------------ 服务模式 ---------------------------- */

.mode-grid {
  margin-top: 52px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.mode-card {
  position: relative;
  padding: 38px 36px;
  border-radius: var(--radius);
  background: linear-gradient(160deg, #0b1830 0%, #12294c 100%);
  color: #fff;
  overflow: hidden;
  isolation: isolate;
}

.mode-card::after {
  content: "";
  position: absolute;
  width: 340px;
  height: 340px;
  right: -120px;
  top: -140px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(18, 184, 217, 0.32), transparent 68%);
  z-index: -1;
}

.mode-card__tag {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.08em;
  background: rgba(255, 255, 255, 0.12);
  color: #8fe7f5;
  margin-bottom: 18px;
}

.mode-card h3 {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.mode-card p {
  margin-top: 12px;
  font-size: 14.5px;
  line-height: 1.82;
  color: rgba(255, 255, 255, 0.66);
}

.mode-card ul {
  margin-top: 22px;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.mode-card li {
  padding: 7px 14px;
  border-radius: 8px;
  font-size: 12.5px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.85);
}

/* ------------------------------- 资讯 ------------------------------- */

.news-grid {
  margin-top: 52px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}

.news-card {
  display: flex;
  flex-direction: column;
  padding: 28px 30px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  transition: transform 0.26s, box-shadow 0.26s, border-color 0.26s;
}

.news-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow);
  border-color: rgba(36, 86, 230, 0.2);
}

.news-card__top {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.news-card__cat {
  padding: 3px 11px;
  border-radius: 6px;
  font-size: 11.5px;
  font-weight: 700;
  color: var(--brand);
  background: var(--brand-soft);
}

.news-card__date {
  font-size: 12.5px;
  color: var(--ink-300);
}

.news-card h3 {
  font-size: 17px;
  font-weight: 700;
  line-height: 1.55;
  color: var(--ink-900);
}

.news-card p {
  margin-top: 12px;
  font-size: 13.8px;
  line-height: 1.8;
  color: var(--ink-400);
  flex: 1;
}

/* ------------------------------ 联系表单 ---------------------------- */

.cta-band {
  position: relative;
  padding: 78px 0;
  background: linear-gradient(120deg, #0a1730 0%, #14315a 55%, #0d4f6e 100%);
  color: #fff;
  overflow: hidden;
}

.cta-band .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
}

.cta-band h2 {
  font-size: clamp(23px, 2.7vw, 33px);
  font-weight: 800;
  letter-spacing: -0.015em;
}

.cta-band p {
  margin-top: 12px;
  font-size: 15px;
  color: rgba(255, 255, 255, 0.68);
  max-width: 46em;
}

.contact-grid {
  margin-top: 56px;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 32px;
  align-items: start;
}

.panel {
  padding: 36px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: var(--shadow-sm);
}

.panel h3 {
  font-size: 19px;
  font-weight: 700;
  color: var(--ink-900);
}

.panel__hint {
  margin-top: 8px;
  font-size: 13.5px;
  color: var(--ink-400);
}

.form-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 20px;
}

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

.field--full {
  grid-column: 1 / -1;
}

.field label {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-700);
}

.field label i {
  color: #e5484d;
  font-style: normal;
  margin-left: 2px;
}

.field input,
.field textarea,
.field select {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fbfcfe;
  font-size: 14px;
  transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
  outline: none;
}

.field textarea {
  min-height: 116px;
  resize: vertical;
  line-height: 1.7;
}

.field input:focus,
.field textarea:focus,
.field select:focus {
  border-color: var(--brand);
  background: #fff;
  box-shadow: 0 0 0 4px rgba(36, 86, 230, 0.1);
}

.form-foot {
  margin-top: 24px;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.form-tip {
  font-size: 12.5px;
  color: var(--ink-300);
}

.form-msg {
  margin-top: 18px;
  padding: 12px 16px;
  border-radius: 10px;
  font-size: 13.5px;
  display: none;
}

.form-msg.is-ok {
  display: block;
  background: #ecfdf3;
  color: #067647;
  border: 1px solid #abefc6;
}

.form-msg.is-err {
  display: block;
  background: #fef3f2;
  color: #b42318;
  border: 1px solid #fecdca;
}

.info-list {
  margin-top: 24px;
  display: grid;
  gap: 4px;
}

.info-item {
  display: flex;
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px dashed var(--line);
}

.info-item:last-child {
  border-bottom: none;
}

.info-item__ico {
  width: 40px;
  height: 40px;
  border-radius: 11px;
  display: grid;
  place-items: center;
  background: var(--brand-soft);
  color: var(--brand);
  flex-shrink: 0;
}

.info-item__ico svg {
  width: 19px;
  height: 19px;
}

.info-item > span:last-child {
  min-width: 0;
}

.info-item__k {
  display: block;
  font-size: 12.5px;
  color: var(--ink-300);
  letter-spacing: 0.04em;
}

.info-item__v {
  display: block;
  margin-top: 3px;
  font-size: 15px;
  font-weight: 600;
  color: var(--ink-900);
  line-height: 1.6;
  word-break: break-all;
}

.map-frame {
  margin-top: 22px;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: linear-gradient(135deg, #eef3fb, #e6eefb);
  height: 260px;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 24px;
}

.map-frame__inner {
  display: grid;
  gap: 10px;
  justify-items: center;
}

.map-frame__pin {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand), var(--accent));
  display: grid;
  place-items: center;
  box-shadow: 0 10px 24px rgba(36, 86, 230, 0.3);
}

.map-frame__pin svg {
  width: 21px;
  height: 21px;
  color: #fff;
}

.map-frame__addr {
  font-size: 14.5px;
  font-weight: 600;
  color: var(--ink-800);
}

.map-frame__sub {
  font-size: 12.5px;
  color: var(--ink-400);
}

/* ------------------------------- 关于我们 --------------------------- */

.page-hero {
  position: relative;
  padding: calc(var(--header-h) + 74px) 0 74px;
  background: var(--bg-dark);
  color: #fff;
  overflow: hidden;
  isolation: isolate;
}

.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
      820px 420px at 82% -20%,
      rgba(18, 184, 217, 0.3),
      transparent 64%
    ),
    radial-gradient(680px 400px at 8% 20%, rgba(36, 86, 230, 0.34), transparent 68%),
    linear-gradient(180deg, #060d1c, #0b1a34);
  z-index: -2;
}

.page-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(
      rgba(255, 255, 255, 0.04) 1px,
      transparent 1px
    ),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 58px 58px;
  mask-image: radial-gradient(ellipse 70% 70% at 50% 30%, #000 40%, transparent 100%);
  -webkit-mask-image: radial-gradient(
    ellipse 70% 70% at 50% 30%,
    #000 40%,
    transparent 100%
  );
  z-index: -1;
}

.page-hero h1 {
  margin-top: 20px;
  font-size: clamp(29px, 3.6vw, 44px);
  font-weight: 800;
  line-height: 1.24;
  letter-spacing: -0.015em;
}

.page-hero p {
  margin-top: 18px;
  font-size: 15.5px;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.68);
  max-width: 52em;
}

.crumb {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.45);
}

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

.prose {
  max-width: 60em;
}

.prose p {
  font-size: 15.5px;
  line-height: 2;
  color: var(--ink-600);
  margin-bottom: 20px;
}

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

.value-grid {
  margin-top: 48px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.timeline {
  margin-top: 52px;
  position: relative;
  display: grid;
  gap: 0;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 96px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--brand), rgba(18, 184, 217, 0.25));
}

.tl-item {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 32px;
  padding: 22px 0;
  position: relative;
}

.tl-item__year {
  font-size: 17px;
  font-weight: 800;
  color: var(--brand);
  text-align: right;
  padding-right: 0;
  letter-spacing: -0.01em;
}

.tl-item__body {
  position: relative;
  padding-left: 32px;
}

.tl-item__body::before {
  content: "";
  position: absolute;
  left: -5.5px;
  top: 8px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: #fff;
  border: 2.5px solid var(--brand);
  box-shadow: 0 0 0 4px rgba(36, 86, 230, 0.1);
}

.tl-item__body h3 {
  font-size: 16.5px;
  font-weight: 700;
  color: var(--ink-900);
}

.tl-item__body p {
  margin-top: 7px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-400);
}

.about-split {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: 56px;
  align-items: start;
}

.about-side {
  padding: 32px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--bg-soft);
}

.about-side h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink-900);
  margin-bottom: 18px;
}

.kv {
  display: grid;
  gap: 14px;
}

.kv__row {
  display: grid;
  gap: 3px;
}

.kv__k {
  font-size: 12.5px;
  color: var(--ink-300);
}

.kv__v {
  font-size: 14.5px;
  font-weight: 600;
  color: var(--ink-800);
  line-height: 1.65;
}

/* ------------------------------ 详情弹层 ---------------------------- */

.modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(8, 16, 34, 0.62);
  backdrop-filter: blur(4px);
}

.modal.is-open {
  display: flex;
}

.modal__box {
  width: min(760px, 100%);
  max-height: 84vh;
  overflow: auto;
  background: #fff;
  border-radius: 18px;
  padding: 40px 42px;
  box-shadow: 0 40px 90px rgba(0, 0, 0, 0.36);
  animation: modalIn 0.28s cubic-bezier(0.2, 0.8, 0.3, 1);
}

@keyframes modalIn {
  from {
    opacity: 0;
    transform: translateY(16px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.modal__close {
  position: absolute;
  top: 22px;
  right: 22px;
}

.modal__box h3 {
  font-size: 23px;
  font-weight: 800;
  color: var(--ink-900);
  letter-spacing: -0.01em;
}

.modal__sub {
  margin-top: 8px;
  font-size: 14px;
  color: var(--accent);
  font-weight: 600;
}

.modal__body {
  margin-top: 20px;
  font-size: 14.8px;
  line-height: 1.95;
  color: var(--ink-600);
  white-space: pre-line;
}

.modal__features {
  margin-top: 26px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.modal__features div {
  display: flex;
  gap: 10px;
  font-size: 13.8px;
  color: var(--ink-600);
  padding: 11px 14px;
  border-radius: 10px;
  background: var(--bg-soft);
}

.modal__features svg {
  width: 15px;
  height: 15px;
  color: var(--brand);
  flex-shrink: 0;
  margin-top: 4px;
}

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

.site-footer {
  background: #060d1c;
  color: rgba(255, 255, 255, 0.6);
  padding: 68px 0 30px;
}

.footer-top {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) repeat(2, minmax(0, 0.75fr));
  gap: 48px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.09);
}

/* 页脚：logo 始终保持品牌原有彩色 */
.site-footer .brand__logo {
  filter: none;
}

.site-footer .brand__sub {
  color: rgba(255, 255, 255, 0.4);
}

.footer-desc {
  margin-top: 20px;
  font-size: 13.5px;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.5);
  max-width: 34em;
}

.footer-contact {
  margin-top: 22px;
  display: grid;
  gap: 10px;
  font-size: 13.5px;
}

.footer-contact div {
  display: flex;
  gap: 9px;
  align-items: flex-start;
}

.footer-contact svg {
  width: 15px;
  height: 15px;
  margin-top: 4px;
  opacity: 0.55;
  flex-shrink: 0;
}

.footer-col h4 {
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 18px;
  letter-spacing: 0.02em;
}

.footer-col ul {
  list-style: none;
  display: grid;
  gap: 11px;
}

.footer-col a {
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.55);
  transition: color 0.2s;
}

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

.footer-bottom {
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 12.5px;
  color: rgba(255, 255, 255, 0.38);
}

/* 页脚备案号链接（工信部要求备案号可点击跳转） */
.footer-bottom a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}

.footer-bottom a:hover {
  color: rgba(255, 255, 255, 0.72);
  text-decoration: underline;
}

/* ------------------------------ 动画工具 ---------------------------- */

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s cubic-bezier(0.2, 0.7, 0.3, 1),
    transform 0.7s cubic-bezier(0.2, 0.7, 0.3, 1);
}

.reveal.is-in {
  opacity: 1;
  transform: none;
}

.skeleton-line {
  height: 12px;
  border-radius: 6px;
  background: linear-gradient(90deg, #eef1f7, #f7f9fc, #eef1f7);
  background-size: 200% 100%;
  animation: shimmer 1.4s infinite;
}

@keyframes shimmer {
  from {
    background-position: 200% 0;
  }
  to {
    background-position: -200% 0;
  }
}

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

@media (max-width: 1080px) {
  .hero__inner {
    grid-template-columns: 1fr;
    gap: 46px;
  }
  .svc-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .adv-grid,
  .value-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
  .about-split {
    grid-template-columns: 1fr;
    gap: 36px;
  }
}

@media (max-width: 820px) {
  :root {
    --header-h: 64px;
  }
  .brand__logo {
    height: 44px;
  }
  .section {
    padding: 68px 0;
  }
  .nav {
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: 12px 18px 18px;
    background: #fff;
    border-bottom: 1px solid var(--line);
    box-shadow: 0 18px 34px rgba(15, 30, 70, 0.09);
    display: none;
  }
  .nav.is-open {
    display: flex;
  }
  .nav a,
  .site-header.is-transparent .nav a {
    color: var(--ink-700);
    padding: 11px 14px;
  }
  .nav a:hover,
  .site-header.is-transparent .nav a:hover {
    color: var(--brand);
    background: var(--brand-soft);
  }
  .nav-toggle {
    display: grid;
  }
  .header-actions .btn {
    display: none;
  }
  .stats-bar__grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .stat {
    padding: 28px 16px;
  }
  .stat:nth-child(2) {
    border-right: none;
  }
  .stat:nth-child(-n + 2) {
    border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  }
  .svc-grid,
  .adv-grid,
  .value-grid,
  .news-grid,
  .mode-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }
  .form-row {
    grid-template-columns: 1fr;
  }
  .footer-top {
    grid-template-columns: 1fr;
    gap: 34px;
  }
  .cta-band .container {
    flex-direction: column;
    align-items: flex-start;
  }
  .timeline::before {
    left: 6px;
  }
  .tl-item {
    grid-template-columns: 1fr;
    gap: 6px;
    padding-left: 28px;
  }
  .tl-item__year {
    text-align: left;
  }
  .tl-item__body {
    padding-left: 0;
  }
  .tl-item__body::before {
    left: -27px;
    top: 3px;
  }
  .modal__box {
    padding: 30px 24px;
  }
  .modal__features {
    grid-template-columns: 1fr;
  }
  .panel,
  .mode-card {
    padding: 26px 22px;
  }
}