/* ============ Design Tokens ============ */
:root {
  /* 亮蓝主题：整体亮蓝背景 + 深蓝文字 */
  --bg: #EBF4FC;          /* 页面主背景：亮蓝（提亮一档） */
  --bg-soft: #DFEDF9;     /* 次背景：稍深亮蓝（同步提亮） */
  --card: #FFFFFF;        /* 卡片：纯白 */
  --card-border: rgba(13, 74, 138, 0.16);
  --ink: #0D3E6E;         /* 文字主色：深海蓝 */
  --muted: #456B8A;       /* 次要文字：蓝灰（加深达标） */
  --accent: #07785A;      /* 能源青绿（深青绿，保对比度） */
  --accent-2: #0B6FD8;    /* 电光蓝（加深保对比度） */
  --accent-dark: #087D5B;
  --line: rgba(13, 74, 138, 0.18);
  --danger: #D64545;
  --radius: 14px;
  --radius-sm: 10px;
  --glow: 0 0 24px rgba(11, 111, 216, 0.22);
  --shadow: 0 10px 30px rgba(13, 62, 110, 0.18);
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-tech: "Orbitron", "Noto Sans SC", sans-serif;
  --font-mono: "JetBrains Mono", "Noto Sans SC", monospace;
  --container: 1120px;
}

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

html { scroll-behavior: smooth; }

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

/* 全局网格背景 + 顶部能量光晕 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background-image:
    linear-gradient(rgba(11, 111, 216, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(11, 111, 216, 0.07) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: linear-gradient(to bottom, rgba(0,0,0,0.9), rgba(0,0,0,0.35) 45%, rgba(0,0,0,0.7));
}

body::after {
  content: "";
  position: fixed;
  top: -260px;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 520px;
  z-index: -1;
  background: radial-gradient(ellipse at center, rgba(11, 111, 216, 0.14), transparent 65%);
  pointer-events: none;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

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

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

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ============ 按钮 ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 30px;
  border-radius: 8px;
  font-weight: 500;
  font-size: 1rem;
  font-family: var(--font-body);
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease, border-color 0.18s ease;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #FFFFFF;
  font-weight: 700;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--glow);
}

.btn-primary:active { transform: translateY(0); }

.btn-ghost {
  border-color: var(--line);
  color: var(--ink);
  background: rgba(255, 255, 255, 0.6);
}

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

.btn-sm { min-height: 40px; padding: 0 20px; font-size: 0.9rem; }
.btn-block { width: 100%; }

/* ============ 导航 ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(227, 240, 251, 0.88);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
}

.nav-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 900;
  font-size: 1.15rem;
  letter-spacing: 0.04em;
}

.nav-logo .accent {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* HOK 文字徽标（替代原电池图形） */
.logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 3px 8px;
  font-family: var(--font-tech);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: #FFFFFF;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-radius: 6px;
  box-shadow: var(--glow);
  transform: translateY(-1px);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 34px;
}

.nav-menu a:not(.btn) {
  font-size: 0.95rem;
  color: var(--muted);
  position: relative;
  transition: color 0.18s ease;
}

.nav-menu a:not(.btn):hover { color: var(--ink); }

.nav-menu a:not(.btn)::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transition: width 0.22s ease;
}

.nav-menu a:not(.btn):hover::after { width: 100%; }

/* 语言切换按钮 */
.lang-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  min-height: 34px;
  padding: 0 12px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 999px;
  transition: color 0.18s ease, border-color 0.18s ease, transform 0.18s ease;
}

.lang-btn:hover {
  color: var(--accent);
  border-color: var(--accent);
  transform: translateY(-1px);
}

/* 移动端菜单内保持胶囊形态，不拉伸整行 */
.nav-menu a.lang-btn {
  display: inline-flex;
  justify-content: center;
  width: auto;
  min-height: 38px;
  padding: 0 14px;
  margin: 6px 0;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: none;
  border: 0;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--ink);
  transition: transform 0.22s ease;
}

.nav-toggle[aria-expanded="true"] span:first-child { transform: translateY(4px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:last-child { transform: translateY(-4px) rotate(-45deg); }

/* ============ Hero ============ */
.hero { padding: 96px 0 0; position: relative; }

.hero-glow {
  position: absolute;
  top: 10%;
  right: 8%;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(11, 111, 216, 0.12), transparent 65%);
  pointer-events: none;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
  padding-bottom: 72px;
}

.hero-eyebrow {
  font-family: var(--font-tech);
  font-size: 0.8rem;
  letter-spacing: 0.35em;
  color: var(--accent);
  margin-bottom: 18px;
}

.hero-title {
  font-size: clamp(2.4rem, 6vw, 4.2rem);
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: 0.01em;
}

.hero-title .grad {
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-sub {
  max-width: 540px;
  margin-top: 22px;
  font-size: 1.08rem;
  color: var(--muted);
}

.hero-sub p + p { margin-top: 6px; }

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 36px;
}

.hero-points {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin-top: 44px;
  font-size: 0.9rem;
  color: var(--muted);
}

.hero-points li { position: relative; padding-left: 18px; }

.hero-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
}

/* ---- CSS 电池图形 ---- */
.hero-battery {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 320px;
}

.battery {
  position: relative;
  z-index: 2;
  width: 200px;
  filter: drop-shadow(0 0 30px rgba(10, 155, 114, 0.25));
}

.battery-cap {
  width: 36px;
  height: 14px;
  margin: 0 auto;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-radius: 4px 4px 0 0;
}

.battery-shell {
  position: relative;
  height: 300px;
  border: 3px solid rgba(11, 111, 216, 0.6);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.55);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.battery-fill {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 92%;
  background: linear-gradient(to top, rgba(10, 155, 114, 0.82), rgba(11, 111, 216, 0.42));
  animation: charge 4.5s ease-in-out infinite;
  transform-origin: bottom;
}

@keyframes charge {
  0%, 100% { transform: scaleY(1); }
  50% { transform: scaleY(0.9); }
}

.battery-shine {
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, transparent 30%, rgba(255, 255, 255, 0.08) 50%, transparent 70%);
}

.battery-pct {
  position: relative;
  z-index: 2;
  font-family: var(--font-tech);
  font-size: 2.6rem;
  font-weight: 700;
  color: #FFFFFF;
  text-shadow: 0 2px 12px rgba(13, 62, 110, 0.55);
}

.battery-label {
  position: absolute;
  bottom: 16px;
  left: 0;
  right: 0;
  z-index: 2;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  color: rgba(255, 255, 255, 0.95);
  text-shadow: 0 1px 6px rgba(13, 62, 110, 0.6);
}

.orbit {
  position: absolute;
  border: 1px dashed rgba(11, 111, 216, 0.35);
  border-radius: 50%;
}

.orbit-a { width: 340px; height: 340px; animation: spin 26s linear infinite; }
.orbit-b { width: 440px; height: 440px; animation: spin 40s linear infinite reverse; }

.orbit::before {
  content: "";
  position: absolute;
  top: -5px;
  left: 50%;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: var(--glow);
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ============ 区块通用 ============ */
.section { padding: 84px 24px; }

.section-head { margin-bottom: 48px; }

.section-eyebrow {
  font-family: var(--font-tech);
  font-size: 0.78rem;
  letter-spacing: 0.32em;
  color: var(--accent-2);
  margin-bottom: 8px;
}

.section-head h2 {
  font-size: clamp(1.7rem, 4vw, 2.3rem);
  font-weight: 900;
}

/* ============ 关于我们 ============ */
.about-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 52px;
  align-items: start;
}

.about-text .lead {
  font-size: 1.3rem;
  font-weight: 700;
  line-height: 1.6;
  margin-bottom: 20px;
}

.about-text p:not(.lead) { color: var(--muted); margin-bottom: 16px; }
.about-text .btn { margin-top: 12px; }

.about-cards { display: grid; gap: 14px; }

.mini-card {
  display: flex;
  gap: 18px;
  align-items: center;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  padding: 20px 22px;
  transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}

.mini-card:hover {
  transform: translateX(6px);
  border-color: var(--accent);
  box-shadow: var(--shadow);
}

.mini-num {
  font-family: var(--font-tech);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent);
  min-width: 72px;
}

.mini-card h3 { font-size: 1rem; }
.mini-card p { font-size: 0.85rem; color: var(--muted); }

/* ============ 产品中心 ============ */
.product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  /* 四列同行，与区块内容同宽，左右边缘与其他区块完全对齐 */
}

.product-card {
  display: flex;
  flex-direction: column;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 22px 16px;
  min-width: 0; /* 防止单卡内容把网格列撑宽，保证四卡等宽 */
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.product-card:hover {
  transform: translateY(-6px);
  border-color: rgba(10, 155, 114, 0.55);
  box-shadow: var(--shadow), var(--glow);
}

.product-icon {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
  background: rgba(11, 111, 216, 0.10);
  border: 1px solid rgba(11, 111, 216, 0.28);
}

.icon-power { background: rgba(10, 155, 114, 0.14); border-color: rgba(10, 155, 114, 0.4); }

/* 简易 CSS 图标 */
.icon-bolt {
  width: 18px; height: 24px;
  background: var(--accent);
  clip-path: polygon(60% 0, 0 60%, 40% 60%, 35% 100%, 100% 35%, 55% 35%);
}

.icon-grid {
  width: 24px; height: 24px;
  background:
    linear-gradient(var(--accent-2), var(--accent-2)) 0 0/8px 8px no-repeat,
    linear-gradient(var(--accent-2), var(--accent-2)) 100% 0/8px 8px no-repeat,
    linear-gradient(var(--accent-2), var(--accent-2)) 0 100%/8px 8px no-repeat,
    linear-gradient(var(--accent-2), var(--accent-2)) 100% 100%/8px 8px no-repeat,
    linear-gradient(var(--accent-2), var(--accent-2)) center/8px 8px no-repeat;
}

.icon-chip {
  width: 24px; height: 24px;
  border: 3px solid var(--accent-2);
  border-radius: 4px;
  position: relative;
}

.icon-chip::after {
  content: "";
  position: absolute;
  inset: 5px;
  background: var(--accent-2);
  border-radius: 2px;
}

/* 充电器插头图标：双插脚 + 圆角主体 + 指示灯 */
.icon-plug {
  width: 22px;
  height: 24px;
  position: relative;
}

.icon-plug::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 16px;
  background:
    radial-gradient(circle at 50% 6px, #fff 0, #fff 2px, transparent 3px),
    var(--accent-2);
  border-radius: 4px 4px 6px 6px;
}

.icon-plug::after {
  content: "";
  position: absolute;
  top: 0;
  left: 4px;
  width: 14px;
  height: 8px;
  background:
    linear-gradient(var(--accent-2), var(--accent-2)) 0 0 / 4px 100% no-repeat,
    linear-gradient(var(--accent-2), var(--accent-2)) 10px 0 / 4px 100% no-repeat;
}

.product-card h3 { font-size: 1.18rem; font-weight: 700; margin-bottom: 8px; }

.product-desc {
  font-size: 0.92rem;
  color: var(--muted);
  margin-bottom: 20px;
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8rem;
  margin-bottom: 18px;
}

.spec-table th {
  text-align: left;
  font-weight: 400;
  color: var(--muted);
  padding: 6px 0;
  border-bottom: 1px dashed var(--line);
  white-space: nowrap;
  padding-right: 8px;
  width: 1%;
}

.spec-table td {
  padding: 8px 0;
  border-bottom: 1px dashed var(--line);
  font-family: var(--font-mono);
  color: var(--accent);
}

.product-link {
  margin-top: auto;
  font-size: 0.9rem;
  color: var(--accent-2);
  transition: color 0.18s ease, letter-spacing 0.18s ease;
}

.product-link:hover { color: var(--accent); letter-spacing: 0.04em; }

/* ============ 核心技术 ============ */
.tech-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.tech-card {
  position: relative;
  background: linear-gradient(180deg, var(--card), var(--bg-soft));
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 34px 30px;
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.tech-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow), var(--glow);
}

.tech-num {
  position: absolute;
  top: 14px;
  right: 20px;
  font-family: var(--font-tech);
  font-size: 2.4rem;
  font-weight: 700;
  color: rgba(11, 111, 216, 0.12);
}

.tech-card h3 { font-size: 1.15rem; margin-bottom: 10px; }
.tech-card p { font-size: 0.94rem; color: var(--muted); max-width: 420px; }

/* ============ 资质认证 ============ */
.cert-wall {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px 14px;
}

/* 桌面端确保 10 徽章单行完整（92*10+14*9=1046 < 1072） */
@media (min-width: 961px) {
  .cert-wall { justify-content: space-between; }
}

.cert-card {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 92px;
  height: 92px;
  background: #FFFFFF;
  border: 1px solid var(--card-border);
  border-radius: 50%;
  overflow: hidden;
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.cert-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.cert-card:hover {
  transform: translateY(-4px);
  border-color: rgba(10, 155, 114, 0.65);
  box-shadow: var(--shadow), var(--glow);
}

@media (max-width: 640px) {
  .cert-card { width: 68px; height: 68px; }
}

/* 窄屏防挤压：徽章等比缩小，不换行错位 */
@media (max-width: 400px) {
  .cert-card { width: 56px; height: 56px; }
}

/* ============ 联系我们 ============ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 48px;
  align-items: start;
}

.contact-info h3 { font-size: 1.4rem; font-weight: 900; margin-bottom: 12px; }
.contact-info > p { color: var(--muted); margin-bottom: 26px; max-width: 420px; }

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

.contact-list li {
  display: flex;
  gap: 18px;
  font-size: 0.95rem;
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--line);
}

.contact-k {
  min-width: 64px;
  color: var(--muted);
}

.contact-list a { color: var(--accent-2); transition: color 0.18s ease; }
.contact-list a:hover { color: var(--accent); }

/* 表单 */

.form-error-global {
  margin-top: 12px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  background: rgba(248, 113, 113, 0.1);
  border: 1px solid rgba(248, 113, 113, 0.4);
  color: var(--danger);
  font-size: 0.9rem;
}

button[disabled] { opacity: 0.6; cursor: not-allowed; }

.contact-form {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 34px 32px;
}

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

/* 整行字段（邮箱等）：跨满两列，避免右侧留空 */
.form-field-full { grid-column: 1 / -1; }

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

.form-field label {
  display: block;
  font-size: 0.88rem;
  color: var(--muted);
  margin-bottom: 8px;
}

.form-field input,
.form-field textarea {
  width: 100%;
  min-height: 48px;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 0.95rem;
  padding: 12px 14px;
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
  resize: vertical;
}

.form-field input::placeholder,
.form-field textarea::placeholder { color: rgba(140, 160, 184, 0.6); }

.form-field input:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(10, 155, 114, 0.18);
}

.form-field input.invalid,
.form-field textarea.invalid { border-color: var(--danger); }

.form-error {
  min-height: 1.2em;
  margin-top: 6px;
  font-size: 0.8rem;
  color: var(--danger);
}

.form-success {
  margin-top: 16px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  background: rgba(10, 155, 114, 0.12);
  border: 1px solid rgba(10, 155, 114, 0.45);
  color: var(--accent);
  font-size: 0.9rem;
}

/* ============ Footer ============ */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 44px 0 32px;
  background: rgba(214, 233, 248, 0.65);
}

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

.footer-brand p {
  margin-top: 10px;
  font-size: 0.88rem;
  color: var(--muted);
}

.footer-nav {
  display: flex;
  gap: 26px;
  flex-wrap: wrap;
}

.footer-nav a {
  font-size: 0.9rem;
  color: var(--muted);
  transition: color 0.18s ease;
}

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

.footer-copy {
  width: 100%;
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px dashed var(--line);
  font-size: 0.82rem;
  color: var(--muted);
}

/* ============ 动效 ============ */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.22, 0.61, 0.36, 1);
}

.hero .reveal {
  transition-delay: calc(0.12s * var(--d, 0));
}

.reveal.visible { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .battery-fill, .orbit-a, .orbit-b { animation: none; }
}

/* ============ 应用领域 ============ */
.app-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.app-card {
  display: flex;
  flex-direction: column;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 28px 26px;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.app-card:hover {
  transform: translateY(-5px);
  border-color: rgba(10, 155, 114, 0.55);
  box-shadow: var(--shadow), var(--glow);
}

.app-icon {
  width: 50px;
  height: 50px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  background: rgba(11, 111, 216, 0.10);
  border: 1px solid rgba(11, 111, 216, 0.28);
}

.app-card h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 8px; }
.app-card p { font-size: 0.88rem; color: var(--muted); }

/* 应用图标（纯 CSS） */
.icon-pin {
  width: 14px; height: 14px;
  border: 3px solid var(--accent-2);
  border-radius: 50% 50% 50% 0;
  transform: rotate(-45deg);
}

.icon-hand {
  width: 18px; height: 22px;
  border: 3px solid var(--accent-2);
  border-radius: 8px 8px 4px 4px;
}

.icon-wave {
  width: 24px; height: 16px;
  border-radius: 50%;
  border-top: 3px solid var(--accent-2);
  border-bottom: 3px solid transparent;
  border-left: 3px solid transparent;
  border-right: 3px solid transparent;
  box-shadow: 0 -8px 0 -3px var(--accent-2);
}

.icon-watch {
  width: 18px; height: 18px;
  border: 3px solid var(--accent-2);
  border-radius: 50%;
  position: relative;
}

.icon-watch::before {
  content: "";
  position: absolute;
  top: -9px; left: 50%;
  transform: translateX(-50%);
  width: 8px; height: 4px;
  background: var(--accent-2);
  border-radius: 2px;
}

.icon-watch::after {
  content: "";
  position: absolute;
  bottom: -9px; left: 50%;
  transform: translateX(-50%);
  width: 8px; height: 4px;
  background: var(--accent-2);
  border-radius: 2px;
}

.icon-cross {
  width: 22px; height: 8px;
  background: var(--accent-2);
  position: relative;
  border-radius: 2px;
}

.icon-cross::after {
  content: "";
  position: absolute;
  top: 7px; left: 7px;
  width: 8px; height: 22px;
  background: var(--accent-2);
  border-radius: 2px;
}

.icon-cube {
  width: 20px; height: 20px;
  border: 3px solid var(--accent-2);
  transform: rotate(45deg);
}

/* ============ 最新资讯 ============ */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.news-card {
  display: flex;
  flex-direction: column;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 26px 24px;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.news-card:hover {
  transform: translateY(-5px);
  border-color: rgba(10, 155, 114, 0.55);
  box-shadow: var(--shadow), var(--glow);
}

.news-date {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 16px;
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--line);
}

.news-date b {
  font-family: var(--font-tech);
  font-size: 2rem;
  font-weight: 700;
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.news-date span {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--muted);
}

.news-card h3 {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  font-size: 1.02rem;
  font-weight: 700;
  line-height: 1.5;
  margin-bottom: 10px;
}

.news-card p { font-size: 0.88rem; color: var(--muted); margin-bottom: 16px; }

.news-more {
  margin-top: auto;
  font-size: 0.88rem;
  color: var(--accent-2);
  transition: color 0.18s ease, letter-spacing 0.18s ease;
}

.news-card:hover .news-more { color: var(--accent); letter-spacing: 0.04em; }

/* ============ 常见问题 ============ */
.faq-list { display: grid; gap: 14px; max-width: 860px; }

.faq-item {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: border-color 0.2s ease;
}

.faq-item[open] { border-color: rgba(10, 155, 114, 0.5); }

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  list-style: none;
  min-height: 48px;
}

.faq-item summary::-webkit-details-marker { display: none; }

.faq-item summary:focus-visible { outline: 2px solid var(--accent); outline-offset: -2px; }

.faq-arrow {
  flex: none;
  width: 10px; height: 10px;
  border-right: 2.5px solid var(--accent-2);
  border-bottom: 2.5px solid var(--accent-2);
  transform: rotate(45deg);
  transition: transform 0.22s ease;
}

.faq-item[open] .faq-arrow { transform: rotate(-135deg); }

.faq-body { padding: 0 24px 22px; }

.faq-body p { font-size: 0.94rem; color: var(--muted); }

/* ============ 定制流程 ============ */
.process-wrap {
  margin-top: 72px;
  padding-top: 52px;
  border-top: 1px dashed var(--line);
}

.process-head { margin-bottom: 40px; }

.process-head h3 {
  font-size: clamp(1.4rem, 3vw, 1.8rem);
  font-weight: 900;
}

.process {
  position: relative;
  display: grid;
  grid-template-columns: repeat(9, 1fr);
  gap: 12px;
  list-style: none;
  counter-reset: none;
}

/* 连接线：横穿节点圆心，青绿→电光蓝渐变 */
.process::before {
  content: "";
  position: absolute;
  top: 24px;
  left: calc(100% / 18);
  right: calc(100% / 18);
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  opacity: 0.5;
}

.step {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.step-node {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--bg-soft);
  border: 1.5px solid rgba(11, 111, 216, 0.5);
  font-family: var(--font-tech);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--accent-2);
  transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease, color 0.18s ease;
}

.step:hover .step-node {
  transform: translateY(-3px);
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: var(--glow);
}

.step-text {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-top: 14px;
}

.step-name { font-size: 0.95rem; font-weight: 700; }

.step-desc {
  margin-top: 4px;
  font-size: 0.72rem;
  color: var(--muted);
  line-height: 1.5;
}

/* 窄屏：转为竖向时间线 */
@media (max-width: 960px) {
  .process { grid-template-columns: 1fr; gap: 0; }

  .process::before {
    top: 36px;
    bottom: 36px;
    left: 23px;
    right: auto;
    width: 2px;
    height: auto;
    background: linear-gradient(180deg, var(--accent), var(--accent-2));
  }

  .step {
    display: grid;
    grid-template-columns: 48px 1fr;
    column-gap: 18px;
    align-items: center;
    text-align: left;
    padding: 12px 0;
  }

  .step-text { align-items: flex-start; margin-top: 0; }
}

/* ============ 锚点目标 ============ */
/* ============ 页脚补充 ============ */
.footer-contact p {
  font-size: 0.88rem;
  color: var(--muted);
  line-height: 1.9;
}

/* ============ 响应式 ============ */
@media (max-width: 960px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-battery { min-height: 380px; }
  .about-grid, .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .product-grid { grid-template-columns: 1fr 1fr; }
  .tech-grid { grid-template-columns: 1fr; }
  .app-grid { grid-template-columns: 1fr 1fr; }
  .news-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .hero { padding-top: 64px; }
  .section { padding: 56px 24px; }
  .product-grid, .app-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; gap: 0; }
  .contact-form { padding: 26px 20px; }
  .footer-inner { flex-direction: column; }

  .nav-toggle { display: flex; }

  .nav-menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    padding: 0 24px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
  }

  .nav-menu.open { max-height: 480px; padding-bottom: 16px; }

  .nav-menu li { border-top: 1px solid var(--line); }
  .nav-menu li:first-child { border-top: 0; }

  .nav-menu a:not(.btn) {
    display: block;
    padding: 14px 0;
    min-height: 44px;
  }

  .nav-menu li:last-child { padding: 14px 0 0; }
  .nav-menu .btn { width: 100%; }
}