/* ============================================================
   杭州边启科技有限公司 官网 — 全局样式
   设计风格：现代简约 / 工业科技蓝 + 生态青
   ============================================================ */

/* ---------- 设计令牌 ---------- */
:root {
  --brand: #1b5fe6;
  --brand-600: #1453d8;
  --brand-700: #1043b0;
  --brand-50: #eef4ff;
  --accent: #0fb5a6;
  --accent-50: #e6f8f6;
  --navy: #0b1d3a;
  --navy-2: #12294f;
  --ink: #16233f;
  --muted: #5c6b84;
  --bg: #ffffff;
  --bg-soft: #f4f7fc;
  --line: #e4eaf3;
  --success: #12b76a;
  --danger: #f04438;
  --warning: #f79009;
  --radius: 14px;
  --radius-lg: 22px;
  --radius-sm: 10px;
  --shadow-sm: 0 1px 2px rgba(11, 29, 58, 0.05), 0 1px 3px rgba(11, 29, 58, 0.08);
  --shadow-md: 0 8px 22px -8px rgba(11, 29, 58, 0.16);
  --shadow-lg: 0 22px 46px -16px rgba(11, 29, 58, 0.24);
  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC",
    "Source Han Sans SC", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  --header-h: 72px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

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

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

body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

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

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

ul,
ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

input,
select,
textarea {
  font-family: inherit;
  font-size: 15px;
}

::selection {
  background: rgba(27, 95, 230, 0.18);
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

section {
  position: relative;
}

/* ---------- 排版 ---------- */
h1,
h2,
h3,
h4 {
  line-height: 1.25;
  color: var(--navy);
  font-weight: 700;
}

.section {
  padding: 96px 0;
}

.section-head {
  max-width: 720px;
  margin: 0 auto 56px;
  text-align: center;
}

.section-head.left {
  margin-left: 0;
  text-align: left;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--brand);
  text-transform: uppercase;
  margin-bottom: 14px;
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 2px;
  background: var(--brand);
  border-radius: 2px;
}

.section-head h2 {
  font-size: clamp(28px, 4vw, 40px);
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}

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

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: 999px;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.2;
  transition: all 0.25s var(--ease);
  white-space: nowrap;
}

.btn svg {
  width: 17px;
  height: 17px;
  flex: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--brand), var(--brand-700));
  color: #fff;
  box-shadow: 0 10px 22px -10px rgba(27, 95, 230, 0.65);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 30px -12px rgba(27, 95, 230, 0.7);
  filter: brightness(1.05);
}

.btn-outline {
  background: #fff;
  color: var(--brand);
  border: 1.5px solid rgba(27, 95, 230, 0.35);
}

.btn-outline:hover {
  border-color: var(--brand);
  background: var(--brand-50);
  transform: translateY(-2px);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  border: 1.5px solid rgba(255, 255, 255, 0.35);
  backdrop-filter: blur(4px);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.18);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 16px 36px;
  font-size: 16.5px;
}

.btn-sm {
  padding: 10px 20px;
  font-size: 14px;
}

/* ---------- 头部导航 ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s, box-shadow 0.3s;
}

.site-header.scrolled {
  border-bottom-color: var(--line);
  box-shadow: 0 4px 18px -8px rgba(11, 29, 58, 0.12);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.brand-mark {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--brand), var(--brand-700));
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 6px 14px -6px rgba(27, 95, 230, 0.6);
  flex: none;
}

.brand-mark svg {
  width: 22px;
  height: 22px;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-text strong {
  font-size: 19px;
  font-weight: 800;
  color: var(--navy);
  letter-spacing: 2px;
}

.brand-text small {
  font-size: 10px;
  letter-spacing: 0.32em;
  color: var(--muted);
  font-weight: 600;
  margin-top: 2px;
}

.brand-logo {
  height: 44px;
  width: auto;
  max-width: 220px;
  object-fit: contain;
  flex: none;
}

.site-footer .brand-logo {
  height: 44px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-link {
  position: relative;
  padding: 10px 16px;
  font-size: 15.5px;
  font-weight: 500;
  color: var(--ink);
  border-radius: 8px;
  transition: color 0.2s, background 0.2s;
}

.nav-link:hover {
  color: var(--brand);
  background: var(--brand-50);
}

.nav-link.active {
  color: var(--brand);
  font-weight: 700;
}

.nav-link.active::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 4px;
  height: 2.5px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--brand), var(--accent));
}

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

.lang-switch {
  display: inline-flex;
  align-items: center;
  border: 1.5px solid var(--line);
  border-radius: 999px;
  overflow: hidden;
  background: #fff;
  flex: none;
}

.lang-switch a {
  padding: 6px 13px;
  font-size: 13px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--muted);
  background: transparent;
  transition: all 0.2s;
  letter-spacing: 0.02em;
}

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

.lang-switch a.active {
  background: linear-gradient(135deg, var(--brand), var(--brand-700));
  color: #fff;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  padding: 10px;
  border-radius: 10px;
  background: var(--bg-soft);
}

.nav-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--navy);
  border-radius: 2px;
  transition: transform 0.3s var(--ease), opacity 0.3s;
}

.nav-toggle.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.open span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- 首页 Hero ---------- */
.hero {
  position: relative;
  padding: calc(var(--header-h) + 64px) 0 88px;
  background:
    radial-gradient(900px 420px at 85% -10%, rgba(27, 95, 230, 0.14), transparent 60%),
    radial-gradient(700px 380px at -5% 110%, rgba(15, 181, 166, 0.1), transparent 60%),
    linear-gradient(180deg, #f7faff 0%, #ffffff 70%);
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(27, 95, 230, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(27, 95, 230, 0.045) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(720px 460px at 60% 0%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(720px 460px at 60% 0%, #000 30%, transparent 75%);
  pointer-events: none;
}

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 16px;
  border-radius: 999px;
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
  font-size: 13.5px;
  font-weight: 600;
  color: var(--brand);
  margin-bottom: 26px;
}

.hero-badge .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-50);
}

.hero h1 {
  font-size: clamp(34px, 5vw, 56px);
  font-weight: 800;
  letter-spacing: 1px;
  line-height: 1.18;
  margin-bottom: 22px;
}

.hero h1 .grad {
  background: linear-gradient(100deg, var(--brand), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero p.lead {
  font-size: 17.5px;
  color: var(--muted);
  max-width: 560px;
  margin-bottom: 36px;
}

.hero-cta {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.hero-note {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 30px;
  font-size: 13.5px;
  color: var(--muted);
}

.hero-note svg {
  width: 16px;
  height: 16px;
  color: var(--accent);
}

/* Hero 设备示意图 */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  perspective: 1200px;
}

.device {
  position: relative;
  width: 340px;
  padding: 14px 14px 18px;
  border-radius: 34px;
  background: linear-gradient(160deg, #1c2c4d, #0b1d3a 70%);
  box-shadow: 0 40px 80px -24px rgba(11, 29, 58, 0.55), inset 0 1px 0 rgba(255, 255, 255, 0.14);
  transform: rotateY(-8deg) rotateX(3deg);
  animation: floaty 6s ease-in-out infinite;
}

@keyframes floaty {
  0%,
  100% {
    transform: rotateY(-8deg) rotateX(3deg) translateY(0);
  }
  50% {
    transform: rotateY(-8deg) rotateX(3deg) translateY(-14px);
  }
}

.device::before {
  content: "";
  position: absolute;
  top: 22px;
  left: 50%;
  transform: translateX(-50%);
  width: 74px;
  height: 6px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.14);
}

.device-screen {
  border-radius: 22px;
  overflow: hidden;
  background: #0f1d3d;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.screen-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  color: #fff;
  font-size: 11px;
  font-weight: 600;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.08), transparent);
}

.screen-dots {
  display: flex;
  gap: 4px;
}

.screen-dots i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.35);
}

.screen-dots i:nth-child(2) {
  background: var(--accent);
}

.screen-dots i:nth-child(3) {
  background: var(--brand);
}

.screen-body {
  padding: 12px;
  display: grid;
  gap: 10px;
}

.screen-tile {
  border-radius: 12px;
  padding: 12px 14px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.07);
}

.screen-tile .t-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
  color: rgba(255, 255, 255, 0.85);
  font-size: 10.5px;
  font-weight: 600;
}

.screen-tile .t-head i {
  width: 8px;
  height: 8px;
  border-radius: 3px;
  background: var(--accent);
}

.bars {
  display: flex;
  align-items: flex-end;
  gap: 5px;
  height: 34px;
}

.bars span {
  flex: 1;
  border-radius: 3px 3px 0 0;
  background: linear-gradient(180deg, var(--brand), rgba(27, 95, 230, 0.35));
}

.bars span:nth-child(2n) {
  background: linear-gradient(180deg, var(--accent), rgba(15, 181, 166, 0.35));
}

.screen-btns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.screen-btns span {
  text-align: center;
  padding: 8px 4px;
  border-radius: 9px;
  font-size: 10px;
  font-weight: 600;
  background: linear-gradient(135deg, var(--brand), var(--brand-700));
  color: #fff;
}

.screen-btns span:last-child {
  background: rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.85);
}

.screen-status {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 8px;
}

.screen-status span {
  border-radius: 9px;
  padding: 9px 6px;
  text-align: center;
  font-size: 10px;
  color: rgba(255, 255, 255, 0.9);
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.screen-status span b {
  display: block;
  font-size: 13px;
  color: #fff;
}

.hero-photo-wrap {
  position: relative;
  width: 420px;
  max-width: 90vw;
}

.hero-photo {
  width: 100%;
  height: auto;
  display: block;
  filter: drop-shadow(0 30px 50px rgba(11, 29, 58, 0.35));
}

.glow-chip {
  position: absolute;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: 999px;
  background: #fff;
  box-shadow: var(--shadow-lg);
  font-size: 13px;
  font-weight: 700;
  color: var(--navy);
  border: 1px solid var(--line);
}

.glow-chip svg {
  width: 18px;
  height: 18px;
  color: var(--brand);
}

.glow-chip.chip-1 {
  top: 12%;
  left: -28px;
  animation: floaty2 5s ease-in-out infinite;
}

.glow-chip.chip-2 {
  bottom: 16%;
  right: -30px;
  animation: floaty2 6.5s ease-in-out infinite reverse;
}

@keyframes floaty2 {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

/* ---------- 产品线 chips ---------- */
.lines-band {
  border-top: 1px solid var(--line);
  background: #fff;
}

.matrix-photo-wrap {
  text-align: center;
  margin: -30px 0 42px;
}

.matrix-photo {
  width: min(540px, 100%);
  border-radius: 20px;
  box-shadow: var(--shadow-lg);
  display: inline-block;
}

.lines-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.line-chip {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 18px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--bg-soft);
  transition: all 0.25s var(--ease);
}

.line-chip:hover {
  border-color: rgba(27, 95, 230, 0.4);
  background: var(--brand-50);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.line-chip .ic {
  width: 40px;
  height: 40px;
  border-radius: 11px;
  background: #fff;
  border: 1px solid var(--line);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--brand);
  flex: none;
}

.line-chip .ic svg {
  width: 21px;
  height: 21px;
}

.line-chip strong {
  font-size: 14.5px;
  color: var(--navy);
  line-height: 1.35;
}

.line-chip small {
  display: block;
  font-size: 12px;
  color: var(--muted);
  font-weight: 400;
  margin-top: 1px;
}

/* ---------- 功能卡片 ---------- */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.card {
  position: relative;
  padding: 30px 26px;
  border-radius: var(--radius-lg);
  background: #fff;
  border: 1px solid var(--line);
  transition: all 0.28s var(--ease);
  overflow: hidden;
}

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

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

.card:hover::after {
  opacity: 1;
}

.card .card-ic {
  width: 54px;
  height: 54px;
  border-radius: 15px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: #fff;
  background: linear-gradient(135deg, var(--brand), var(--brand-700));
  box-shadow: 0 10px 20px -8px rgba(27, 95, 230, 0.6);
}

.card .card-ic.teal {
  background: linear-gradient(135deg, var(--accent), #0b8f84);
  box-shadow: 0 10px 20px -8px rgba(15, 181, 166, 0.55);
}

.card .card-ic svg {
  width: 26px;
  height: 26px;
}

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

.card p {
  font-size: 14.5px;
  color: var(--muted);
}

.card .card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
  font-size: 14px;
  font-weight: 600;
  color: var(--brand);
}

.card .card-link svg {
  width: 14px;
  height: 14px;
  transition: transform 0.2s;
}

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

/* ---------- 应用场景 ---------- */
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.scenario {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 18px;
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid var(--line);
  font-size: 14.5px;
  font-weight: 600;
  color: var(--ink);
  transition: all 0.22s var(--ease);
}

.scenario:hover {
  background: var(--brand);
  border-color: var(--brand);
  color: #fff;
  transform: translateY(-3px);
  box-shadow: 0 14px 26px -12px rgba(27, 95, 230, 0.65);
}

.scenario svg {
  width: 19px;
  height: 19px;
  color: var(--brand);
  flex: none;
}

.scenario:hover svg {
  color: #fff;
}

/* ---------- 数据带 ---------- */
.stats-band {
  background:
    radial-gradient(800px 320px at 20% -20%, rgba(27, 95, 230, 0.35), transparent 60%),
    radial-gradient(600px 300px at 90% 120%, rgba(15, 181, 166, 0.22), transparent 60%),
    var(--navy);
  color: #fff;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}

.stat b {
  display: block;
  font-size: clamp(34px, 4.5vw, 48px);
  font-weight: 800;
  line-height: 1.1;
  background: linear-gradient(120deg, #ffffff, #a9c8ff);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.stat b em {
  font-style: normal;
  font-size: 0.55em;
  margin-left: 2px;
}

.stat span {
  display: block;
  margin-top: 8px;
  font-size: 14.5px;
  color: rgba(255, 255, 255, 0.72);
}

/* ---------- 流程 ---------- */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
  counter-reset: step;
}

.step {
  position: relative;
  padding: 30px 24px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  transition: all 0.25s var(--ease);
}

.step:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.step .step-num {
  counter-increment: step;
  content: counter(step);
  width: 46px;
  height: 46px;
  border-radius: 13px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 19px;
  font-weight: 800;
  color: #fff;
  background: linear-gradient(135deg, var(--brand), var(--accent));
  margin-bottom: 18px;
  box-shadow: 0 8px 16px -6px rgba(27, 95, 230, 0.5);
}

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

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

.step::after {
  content: "";
  position: absolute;
  top: 50px;
  right: -22px;
  width: 22px;
  height: 2px;
  background: repeating-linear-gradient(90deg, var(--brand) 0 6px, transparent 6px 11px);
  opacity: 0.4;
}

.step:last-child::after {
  display: none;
}

/* ---------- 实力/优势 ---------- */
.split-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.split-visual {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  min-height: 360px;
  background:
    radial-gradient(400px 260px at 80% 10%, rgba(27, 95, 230, 0.3), transparent 60%),
    radial-gradient(340px 240px at 10% 90%, rgba(15, 181, 166, 0.25), transparent 60%),
    linear-gradient(150deg, #13264d, #0b1d3a);
  display: flex;
  align-items: center;
  justify-content: center;
}

.split-visual .vc {
  position: relative;
  width: 240px;
  border-radius: 26px;
  padding: 12px 12px 16px;
  background: #fff;
  box-shadow: 0 30px 60px -18px rgba(0, 0, 0, 0.5);
  transform: rotate(-4deg);
}

.split-visual .vc .screen-mini {
  border-radius: 16px;
  background: #0f1d3d;
  padding: 12px;
  display: grid;
  gap: 8px;
}

.split-visual .vc .mini-bar {
  height: 8px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.14);
}

.split-visual .vc .mini-bar.hi {
  width: 70%;
  background: linear-gradient(90deg, var(--brand), var(--accent));
}

.split-photo {
  width: 100%;
  height: 100%;
  min-height: 360px;
  object-fit: cover;
}

/* ---------- 图片画廊 ---------- */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.gallery-grid.four {
  grid-template-columns: repeat(4, 1fr);
}

.gallery-item {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: #fff;
  transition: all 0.25s var(--ease);
}

.gallery-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.gallery-item img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  display: block;
}

.gallery-item figcaption {
  padding: 11px 14px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--navy);
  text-align: center;
}

.gallery-title {
  text-align: center;
  font-size: 21px;
  font-weight: 700;
  color: var(--navy);
  margin: 58px 0 26px;
}

.gallery-title::after {
  content: "";
  display: block;
  width: 46px;
  height: 3px;
  margin: 10px auto 0;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--brand), var(--accent));
}

.check-list li {
  position: relative;
  padding: 10px 0 10px 36px;
  font-size: 15.5px;
  color: var(--ink);
}

.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--accent-50);
  border: 1px solid rgba(15, 181, 166, 0.4);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%230fb5a6' stroke-width='3.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6L9 17l-5-5'/%3E%3C/svg%3E");
  background-size: 12px;
  background-position: center;
  background-repeat: no-repeat;
}

/* ---------- 价值观 ---------- */
.values-band {
  background: var(--bg-soft);
}

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

.value-card {
  text-align: center;
  padding: 34px 22px;
  background: #fff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  transition: all 0.25s var(--ease);
}

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

.value-card .v-ic {
  width: 56px;
  height: 56px;
  margin: 0 auto 18px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--brand);
  background: var(--brand-50);
}

.value-card .v-ic svg {
  width: 26px;
  height: 26px;
}

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

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

/* ---------- CTA 条 ---------- */
.cta-band {
  background:
    radial-gradient(560px 300px at 15% 0%, rgba(15, 181, 166, 0.3), transparent 60%),
    radial-gradient(700px 340px at 90% 100%, rgba(27, 95, 230, 0.5), transparent 60%),
    linear-gradient(135deg, #0e2a5e, #0b1d3a);
  color: #fff;
}

.cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}

.cta-inner h2 {
  color: #fff;
  font-size: clamp(24px, 3.4vw, 34px);
  margin-bottom: 10px;
}

.cta-inner p {
  color: rgba(255, 255, 255, 0.75);
  font-size: 16px;
}

/* ---------- 页脚 ---------- */
.site-footer {
  background: var(--navy);
  color: rgba(255, 255, 255, 0.75);
  font-size: 14.5px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 1.1fr 1.1fr;
  gap: 44px;
  padding: 64px 24px 48px;
}

.footer-brand .brand-text strong {
  color: #fff;
}

.footer-brand .brand-text small {
  color: rgba(255, 255, 255, 0.5);
}

.footer-brand p {
  margin-top: 18px;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.8;
  max-width: 320px;
}

.footer-col h4 {
  color: #fff;
  font-size: 16px;
  margin-bottom: 20px;
  letter-spacing: 1px;
}

.footer-col ul li {
  margin-bottom: 12px;
}

.footer-col a {
  color: rgba(255, 255, 255, 0.68);
  transition: color 0.2s, padding-left 0.2s;
}

.footer-col a:hover {
  color: #fff;
  padding-left: 4px;
}

.footer-contact li {
  display: flex;
  gap: 10px;
  margin-bottom: 14px;
  align-items: flex-start;
  color: rgba(255, 255, 255, 0.68);
}

.footer-contact svg {
  width: 16px;
  height: 16px;
  margin-top: 3px;
  color: var(--accent);
  flex: none;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 22px 24px;
  text-align: center;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.45);
}

.footer-bottom a {
  color: rgba(255, 255, 255, 0.6);
}

/* ---------- 内页 Hero ---------- */
.page-hero {
  padding: calc(var(--header-h) + 56px) 0 64px;
  background:
    radial-gradient(700px 320px at 90% -20%, rgba(27, 95, 230, 0.16), transparent 60%),
    radial-gradient(520px 280px at 0% 110%, rgba(15, 181, 166, 0.12), transparent 60%),
    linear-gradient(180deg, #f7faff, #fff);
  border-bottom: 1px solid var(--line);
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  color: var(--muted);
  margin-bottom: 18px;
}

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

.breadcrumb span.sep {
  color: var(--line);
}

.page-hero h1 {
  font-size: clamp(30px, 4.4vw, 44px);
  font-weight: 800;
  margin-bottom: 14px;
}

.page-hero p {
  color: var(--muted);
  font-size: 16.5px;
  max-width: 680px;
}

/* ---------- 产品详情 ---------- */
.series-list {
  display: grid;
  gap: 32px;
}

.series {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 34px;
  padding: 34px;
  border-radius: var(--radius-lg);
  background: #fff;
  border: 1px solid var(--line);
  transition: box-shadow 0.25s var(--ease);
}

.series:hover {
  box-shadow: var(--shadow-lg);
}

.series-visual {
  position: relative;
  border-radius: var(--radius);
  background: linear-gradient(160deg, #eef4ff, #f8fbfe);
  border: 1px solid var(--line);
  min-height: 210px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 20px;
}

.series-visual .mini-device {
  width: 170px;
  border-radius: 20px;
  background: linear-gradient(160deg, #1c2c4d, #0b1d3a);
  padding: 9px 9px 13px;
  box-shadow: 0 18px 36px -14px rgba(11, 29, 58, 0.5);
}

.mini-device .md-screen {
  border-radius: 12px;
  background: #10204a;
  padding: 9px;
  display: grid;
  gap: 6px;
}

.mini-device .md-screen i {
  height: 7px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.14);
}

.mini-device .md-screen i:nth-child(2) {
  width: 62%;
  background: linear-gradient(90deg, var(--brand), var(--accent));
}

.mini-device .md-screen .md-row {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 5px;
}

.mini-device .md-screen .md-row i {
  height: 14px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.series-tag {
  font-size: 12px;
  font-weight: 700;
  color: var(--brand);
  background: #fff;
  border: 1px solid var(--line);
  padding: 6px 14px;
  border-radius: 999px;
}

.series-photo {
  width: 100%;
  height: 240px;
  object-fit: contain;
  filter: drop-shadow(0 18px 26px rgba(11, 29, 58, 0.22));
}

.series h3 {
  font-size: 23px;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.series h3 .ver {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-50);
  border: 1px solid rgba(15, 181, 166, 0.3);
  padding: 3px 12px;
  border-radius: 999px;
}

.series .desc {
  color: var(--muted);
  font-size: 14.5px;
  margin-bottom: 18px;
}

.spec-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 18px;
}

.spec-item {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  background: var(--bg-soft);
  border: 1px solid var(--line);
}

.spec-item svg {
  width: 17px;
  height: 17px;
  color: var(--brand);
  margin-top: 2px;
  flex: none;
}

.spec-item b {
  display: block;
  font-size: 12px;
  color: var(--muted);
  font-weight: 600;
  letter-spacing: 0.04em;
}

.spec-item span {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--ink);
}

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

.series-meta span {
  font-size: 12.5px;
  color: var(--muted);
  background: #fff;
  border: 1px solid var(--line);
  padding: 5px 12px;
  border-radius: 999px;
}

/* ---------- 规格表 ---------- */
.table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
}

.spec-table {
  width: 100%;
  min-width: 760px;
  border-collapse: collapse;
  font-size: 14px;
  background: #fff;
}

.spec-table thead th {
  background: var(--navy);
  color: #fff;
  font-weight: 600;
  padding: 15px 18px;
  text-align: left;
  font-size: 13.5px;
  letter-spacing: 0.03em;
  white-space: nowrap;
}

.spec-table tbody td {
  padding: 14px 18px;
  border-top: 1px solid var(--line);
  color: var(--ink);
  vertical-align: top;
}

.spec-table tbody tr:nth-child(even) td {
  background: var(--bg-soft);
}

.spec-table tbody tr:hover td {
  background: var(--brand-50);
}

.spec-table td .mono {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--brand);
  font-weight: 600;
  white-space: nowrap;
}

.table-note {
  margin-top: 14px;
  font-size: 13px;
  color: var(--muted);
}

/* ---------- 关于我们 ---------- */
.about-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 52px;
  align-items: center;
}

.about-intro .lead {
  font-size: 17px;
  color: var(--muted);
  margin-bottom: 20px;
}

.about-intro .lead strong {
  color: var(--navy);
}

.about-visual {
  border-radius: var(--radius-lg);
  background:
    radial-gradient(380px 240px at 85% 15%, rgba(27, 95, 230, 0.3), transparent 60%),
    radial-gradient(320px 220px at 10% 90%, rgba(15, 181, 166, 0.22), transparent 60%),
    linear-gradient(150deg, #13264d, #0b1d3a);
  min-height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.85);
  position: relative;
  overflow: hidden;
}

.about-photo {
  width: 100%;
  height: 100%;
  min-height: 320px;
  object-fit: cover;
  display: block;
}

.about-visual .eco-word {
  font-size: clamp(30px, 4vw, 44px);
  font-weight: 800;
  letter-spacing: 0.06em;
  background: linear-gradient(120deg, #fff, #8fd6ff);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-align: center;
  line-height: 1.3;
}

.about-visual .eco-sub {
  position: absolute;
  bottom: 26px;
  left: 0;
  right: 0;
  text-align: center;
  font-size: 12.5px;
  letter-spacing: 0.3em;
  color: rgba(255, 255, 255, 0.5);
}

.timeline {
  position: relative;
  padding-left: 30px;
  display: grid;
  gap: 26px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: linear-gradient(180deg, var(--brand), var(--accent));
  opacity: 0.35;
}

.tl-item {
  position: relative;
}

.tl-item::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 5px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #fff;
  border: 4px solid var(--brand);
  box-shadow: 0 0 0 4px rgba(27, 95, 230, 0.15);
}

.tl-item b {
  display: block;
  font-size: 15px;
  color: var(--brand);
  font-weight: 800;
  margin-bottom: 4px;
}

.tl-item p {
  font-size: 14.5px;
  color: var(--muted);
}

.facility-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.facility {
  padding: 26px 22px;
  border-radius: var(--radius-lg);
  background: #fff;
  border: 1px solid var(--line);
  transition: all 0.25s var(--ease);
}

.facility:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(27, 95, 230, 0.35);
}

.facility .f-ic {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  background: linear-gradient(135deg, var(--brand), var(--brand-700));
  margin-bottom: 14px;
}

.facility .f-ic.teal {
  background: linear-gradient(135deg, var(--accent), #0b8f84);
}

.facility .f-ic svg {
  width: 22px;
  height: 22px;
}

.facility h3 {
  font-size: 16.5px;
  margin-bottom: 8px;
}

.facility p {
  font-size: 13.5px;
  color: var(--muted);
}

/* ---------- 联系我们 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 32px;
  align-items: start;
}

.contact-cards {
  display: grid;
  gap: 16px;
}

.contact-card {
  display: flex;
  gap: 16px;
  padding: 22px;
  border-radius: var(--radius-lg);
  background: #fff;
  border: 1px solid var(--line);
  transition: all 0.22s var(--ease);
}

.contact-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.contact-card .cc-ic {
  width: 48px;
  height: 48px;
  border-radius: 13px;
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--brand);
  background: var(--brand-50);
}

.contact-card .cc-ic svg {
  width: 22px;
  height: 22px;
}

.contact-card h3 {
  font-size: 15.5px;
  margin-bottom: 4px;
}

.contact-card p,
.contact-card a {
  font-size: 14.5px;
  color: var(--muted);
  word-break: break-all;
}

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

.form-panel {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 34px;
  box-shadow: var(--shadow-sm);
}

.form-panel h3 {
  font-size: 21px;
  margin-bottom: 6px;
}

.form-panel .form-sub {
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 26px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 7px;
}

.form-group label em {
  color: var(--danger);
  font-style: normal;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 15px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--line);
  background: var(--bg-soft);
  color: var(--ink);
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
}

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

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--brand);
  background: #fff;
  box-shadow: 0 0 0 4px rgba(27, 95, 230, 0.12);
}

.form-group .err {
  font-size: 12.5px;
  color: var(--danger);
  margin-top: 5px;
  display: none;
}

.form-group.invalid input,
.form-group.invalid select,
.form-group.invalid textarea {
  border-color: var(--danger);
  background: #fff7f6;
}

.form-group.invalid .err {
  display: block;
}

.form-success {
  display: none;
  align-items: center;
  gap: 12px;
  padding: 16px 18px;
  border-radius: var(--radius-sm);
  background: var(--accent-50);
  border: 1px solid rgba(15, 181, 166, 0.35);
  color: #0b7d72;
  font-size: 14.5px;
  margin-bottom: 20px;
}

.form-success.show {
  display: flex;
}

.form-success svg {
  width: 20px;
  height: 20px;
  flex: none;
}

.map-panel {
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  overflow: hidden;
  background: var(--bg-soft);
  display: flex;
  flex-direction: column;
}

.map-placeholder {
  flex: 1;
  min-height: 280px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background:
    linear-gradient(rgba(27, 95, 230, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(27, 95, 230, 0.05) 1px, transparent 1px),
    var(--bg-soft);
  background-size: 32px 32px;
  color: var(--muted);
  font-size: 14px;
  padding: 24px;
  text-align: center;
}

.map-placeholder svg {
  width: 40px;
  height: 40px;
  color: var(--brand);
}

.map-address {
  padding: 16px 22px;
  border-top: 1px solid var(--line);
  background: #fff;
  font-size: 14px;
  color: var(--ink);
}

/* ---------- 滚动显现 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

.reveal.visible {
  opacity: 1;
  transform: none;
}

/* ---------- 返回顶部 ---------- */
.to-top {
  position: fixed;
  right: 26px;
  bottom: 26px;
  z-index: 90;
  width: 46px;
  height: 46px;
  border-radius: 13px;
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-lg);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--brand);
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px);
  transition: all 0.3s var(--ease);
}

.to-top.show {
  opacity: 1;
  pointer-events: auto;
  transform: none;
}

.to-top:hover {
  background: var(--brand);
  color: #fff;
}

.to-top svg {
  width: 20px;
  height: 20px;
}

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .cards-grid,
  .values-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .steps-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 34px 22px;
  }

  .step::after {
    display: none;
  }

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

  .series-visual {
    min-height: 180px;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .hero-visual {
    order: -1;
  }

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

  .contact-grid,
  .about-intro,
  .split-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 36px 20px;
  }
}

@media (max-width: 760px) {
  .site-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px 24px 24px;
    border-bottom: 1px solid var(--line);
    box-shadow: 0 20px 40px -18px rgba(11, 29, 58, 0.25);
    transform: translateY(-14px);
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s var(--ease);
  }

  .site-nav.open {
    transform: none;
    opacity: 1;
    pointer-events: auto;
  }

  .nav-link {
    padding: 14px 10px;
    font-size: 16.5px;
    border-bottom: 1px solid var(--line);
    border-radius: 0;
  }

  .nav-link.active::after {
    display: none;
  }

  .nav-link.active {
    color: var(--brand);
    background: var(--brand-50);
    border-radius: 10px;
  }

  .nav-toggle {
    display: flex;
  }

  .header-actions .nav-cta {
    display: none;
  }

  .section {
    padding: 68px 0;
  }

  .cards-grid,
  .values-grid,
  .lines-grid,
  .scenario-grid,
  .facility-grid {
    grid-template-columns: 1fr;
  }

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

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

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 34px;
  }

  .glow-chip.chip-1 {
    left: -6px;
  }

  .glow-chip.chip-2 {
    right: -6px;
  }

  .hero {
    padding-top: calc(var(--header-h) + 40px);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }
}

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

@media (max-width: 760px) {
  .gallery-grid,
  .gallery-grid.four {
    grid-template-columns: 1fr;
  }
}