/* ==========================================================================
   瀚森具身智能科技（杭州）有限公司 — 官网样式
   设计系统：配色 / 字体 / 栅格 / 组件 / 响应式
   ========================================================================== */

:root {
  /* 品牌色 */
  --c-primary: #1057d8;
  --c-primary-dark: #0a3fa3;
  --c-primary-light: #3d82ff;
  --c-accent: #00c2c7;
  --c-accent-soft: #e6fbfa;

  /* 中性色 */
  --c-bg: #ffffff;
  --c-bg-soft: #f5f7fb;
  --c-bg-deep: #0a1c3d;
  --c-surface: #ffffff;
  --c-border: #e4e9f2;

  --c-text: #16203a;
  --c-text-soft: #4a5670;
  --c-text-mute: #8692ab;
  --c-text-invert: #ffffff;

  /* 圆角 / 阴影 */
  --r-sm: 8px;
  --r-md: 14px;
  --r-lg: 22px;
  --r-pill: 999px;
  --sh-sm: 0 2px 10px rgba(16, 40, 90, 0.06);
  --sh-md: 0 10px 30px rgba(16, 40, 90, 0.08);
  --sh-lg: 0 22px 60px rgba(10, 28, 61, 0.12);

  /* 布局 */
  --w-container: 1200px;
  --h-header: 72px;

  /* 动效 */
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--c-text);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, h5 { margin: 0; line-height: 1.3; font-weight: 700; letter-spacing: -0.01em; }
p { margin: 0; }
button { font-family: inherit; }

::selection { background: var(--c-primary); color: #fff; }

/* ---------- 布局容器 ---------- */
.container {
  width: 100%;
  max-width: var(--w-container);
  margin: 0 auto;
  padding: 0 24px;
}

.section { padding: 96px 0; }
.section--soft { background: var(--c-bg-soft); }
.section--deep { background: var(--c-bg-deep); color: var(--c-text-invert); }
.section--tight { padding: 64px 0; }

.grid { display: grid; gap: 28px; }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

/* ---------- 通用文本 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--c-primary);
  text-transform: uppercase;
}
.eyebrow::before {
  content: "";
  width: 26px;
  height: 2px;
  background: linear-gradient(90deg, var(--c-primary), var(--c-accent));
  border-radius: 2px;
}
.section--deep .eyebrow { color: #6fd7ff; }
.section--deep .eyebrow::before { background: linear-gradient(90deg, #6fd7ff, var(--c-accent)); }

.section-title {
  font-size: clamp(26px, 3.2vw, 40px);
  margin: 16px 0 14px;
}
.section-desc {
  color: var(--c-text-soft);
  font-size: 17px;
  max-width: 720px;
}
.section--deep .section-desc { color: rgba(255, 255, 255, 0.72); }

.section-head { margin-bottom: 52px; }
.section-head--center { text-align: center; }
.section-head--center .section-desc { margin: 0 auto; }
.section-head--center .eyebrow { justify-content: center; }

.text-primary { color: var(--c-primary); }
.text-accent { color: var(--c-accent); }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-40 { margin-top: 40px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 28px;
  border-radius: var(--r-pill);
  border: 1px solid transparent;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s var(--ease);
  white-space: nowrap;
}
.btn-primary { background: var(--c-primary); color: #fff; box-shadow: 0 8px 22px rgba(16, 87, 216, 0.28); }
.btn-primary:hover { background: var(--c-primary-dark); transform: translateY(-2px); box-shadow: 0 12px 28px rgba(16, 87, 216, 0.34); }
.btn-outline { border-color: rgba(255, 255, 255, 0.5); color: #fff; }
.btn-outline:hover { background: rgba(255, 255, 255, 0.14); border-color: #fff; }
.btn-outline-dark { border-color: var(--c-border); color: var(--c-text); background: #fff; }
.btn-outline-dark:hover { border-color: var(--c-primary); color: var(--c-primary); transform: translateY(-2px); }
.btn-ghost-light { background: rgba(255, 255, 255, 0.1); color: #fff; border-color: rgba(255, 255, 255, 0.22); }
.btn-ghost-light:hover { background: rgba(255, 255, 255, 0.2); }
.btn .arrow { transition: transform 0.25s var(--ease); }
.btn:hover .arrow { transform: translateX(4px); }

.btn-row { display: flex; flex-wrap: wrap; gap: 16px; }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--h-header);
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid rgba(16, 40, 90, 0.07);
  transition: box-shadow 0.3s var(--ease), background 0.3s var(--ease);
}
.site-header.is-scrolled { box-shadow: 0 6px 24px rgba(10, 28, 61, 0.08); background: rgba(255, 255, 255, 0.96); }

.header-inner {
  width: 100%;
  max-width: var(--w-container);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo { display: flex; align-items: center; gap: 12px; }
.logo img { height: 38px; width: auto; }
.logo-text strong { display: block; font-size: 17px; letter-spacing: 0.01em; }
.logo-text span { display: block; font-size: 11px; color: var(--c-text-mute); letter-spacing: 0.18em; }

.nav { display: flex; align-items: center; gap: 6px; }
.nav-item { position: relative; }
.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 14px;
  border-radius: var(--r-pill);
  font-size: 15px;
  font-weight: 500;
  color: var(--c-text-soft);
  transition: all 0.2s var(--ease);
}
.nav-link:hover, .nav-item.is-open > .nav-link { color: var(--c-primary); background: rgba(16, 87, 216, 0.07); }
.nav-link.is-active { color: var(--c-primary); font-weight: 600; }
.nav-link .caret { width: 12px; height: 12px; transition: transform 0.2s var(--ease); }
.nav-item.is-open .caret { transform: rotate(180deg); }

.dropdown {
  position: absolute;
  top: calc(100% + 10px);
  left: 50%;
  transform: translate(-50%, 8px);
  min-width: 268px;
  padding: 10px;
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
  box-shadow: var(--sh-lg);
  opacity: 0;
  visibility: hidden;
  transition: all 0.22s var(--ease);
}
.nav-item.is-open .dropdown { opacity: 1; visibility: visible; transform: translate(-50%, 0); }
.dropdown a {
  display: block;
  padding: 11px 14px;
  border-radius: 10px;
  font-size: 15px;
  color: var(--c-text-soft);
  transition: all 0.18s var(--ease);
}
.dropdown a:hover { background: var(--c-bg-soft); color: var(--c-primary); }
.dropdown a small { display: block; font-size: 12px; color: var(--c-text-mute); }

.header-cta { display: flex; align-items: center; gap: 14px; }
.header-phone { font-size: 14px; color: var(--c-text-mute); }
.header-phone b { color: var(--c-text); font-size: 16px; }

.burger {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--c-border);
  border-radius: 12px;
  background: #fff;
  cursor: pointer;
  padding: 0;
  position: relative;
}
.burger span {
  position: absolute;
  left: 12px;
  width: 20px;
  height: 2px;
  background: var(--c-text);
  border-radius: 2px;
  transition: all 0.25s var(--ease);
}
.burger span:nth-child(1) { top: 15px; }
.burger span:nth-child(2) { top: 21px; }
.burger span:nth-child(3) { top: 27px; }
.burger.is-open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.burger.is-open span:nth-child(2) { opacity: 0; }
.burger.is-open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: calc(var(--h-header) + 90px) 0 110px;
  background:
    radial-gradient(900px 460px at 88% 8%, rgba(0, 194, 199, 0.16), transparent 62%),
    radial-gradient(760px 420px at 10% 4%, rgba(16, 87, 216, 0.16), transparent 60%),
    linear-gradient(180deg, #f7f9ff 0%, #ffffff 100%);
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(16, 40, 90, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(16, 40, 90, 0.045) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 40%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 40%, transparent 100%);
  pointer-events: none;
}
.hero .container { position: relative; z-index: 1; }
.hero-grid { display: grid; grid-template-columns: 1.08fr 0.92fr; gap: 56px; align-items: center; }

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 7px 16px 7px 8px;
  border-radius: var(--r-pill);
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid var(--c-border);
  box-shadow: var(--sh-sm);
  font-size: 13px;
  color: var(--c-text-soft);
}
.hero-badge b { color: var(--c-primary); font-weight: 600; }
.dot-pulse {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--c-accent);
  box-shadow: 0 0 0 4px rgba(0, 194, 199, 0.18);
  animation: pulse 2s infinite;
  margin-left: 4px;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(0, 194, 199, 0.35); }
  70% { box-shadow: 0 0 0 10px rgba(0, 194, 199, 0); }
  100% { box-shadow: 0 0 0 0 rgba(0, 194, 199, 0); }
}

.hero h1 {
  font-size: clamp(32px, 4.4vw, 56px);
  line-height: 1.2;
  margin: 24px 0 20px;
  letter-spacing: -0.02em;
}
.hero h1 em {
  font-style: normal;
  background: linear-gradient(96deg, var(--c-primary) 8%, var(--c-accent) 92%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero p.lead { font-size: 18px; color: var(--c-text-soft); max-width: 560px; }

.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 44px;
  padding-top: 30px;
  border-top: 1px solid var(--c-border);
}
.hero-stats .num { font-size: 30px; font-weight: 700; color: var(--c-primary); letter-spacing: -0.02em; }
.hero-stats .label { font-size: 13px; color: var(--c-text-mute); }

.hero-visual { position: relative; }
.hero-visual img,
.about-visual img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; border-radius: var(--r-lg); box-shadow: var(--sh-lg); }
.hero-float-card {
  position: absolute;
  bottom: -26px;
  left: -18px;
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
  box-shadow: var(--sh-lg);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  max-width: 258px;
}
.hero-float-card .icon {
  width: 40px; height: 40px; flex: none;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--c-primary), var(--c-accent));
  display: grid; place-items: center;
  color: #fff;
}
.hero-float-card strong { display: block; font-size: 15px; }
.hero-float-card span { font-size: 12px; color: var(--c-text-mute); }

/* ---------- 核心价值 ---------- */
.value-card {
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  padding: 32px 28px;
  transition: all 0.3s var(--ease);
  height: 100%;
}
.value-card:hover { transform: translateY(-6px); box-shadow: var(--sh-md); border-color: rgba(16, 87, 216, 0.24); }
.value-icon {
  width: 54px; height: 54px;
  border-radius: 16px;
  display: grid; place-items: center;
  background: linear-gradient(135deg, rgba(16, 87, 216, 0.1), rgba(0, 194, 199, 0.16));
  color: var(--c-primary);
  margin-bottom: 20px;
}
.value-card h3 { font-size: 19px; margin-bottom: 10px; }
.value-card p { color: var(--c-text-soft); font-size: 15px; }
.value-card .index {
  float: right;
  font-size: 40px;
  font-weight: 800;
  color: rgba(16, 87, 216, 0.1);
  line-height: 1;
  margin-top: -6px;
}

/* ---------- 服务卡片 ---------- */
.service-card {
  position: relative;
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  padding: 30px 26px 26px;
  overflow: hidden;
  height: 100%;
  transition: all 0.3s var(--ease);
}
.service-card::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 3px;
  background: linear-gradient(90deg, var(--c-primary), var(--c-accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s var(--ease);
}
.service-card:hover { transform: translateY(-6px); box-shadow: var(--sh-md); }
.service-card:hover::after { transform: scaleX(1); }

.service-icon {
  width: 52px; height: 52px;
  border-radius: 15px;
  display: grid; place-items: center;
  background: var(--c-bg-soft);
  color: var(--c-primary);
  margin-bottom: 18px;
}
.service-card h3 { font-size: 20px; margin-bottom: 10px; }
.service-card p { color: var(--c-text-soft); font-size: 15px; flex: 1; }
.service-tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0 20px; }
.tag {
  font-size: 12px;
  padding: 4px 11px;
  border-radius: var(--r-pill);
  background: rgba(16, 87, 216, 0.07);
  color: var(--c-primary);
}
.service-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 600;
  color: var(--c-primary);
}
.service-link svg { transition: transform 0.25s var(--ease); }
.service-card:hover .service-link svg { transform: translateX(4px); }

/* ---------- 案例 / 客户 ---------- */
.case-card {
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  overflow: hidden;
  height: 100%;
  display: flex;
  flex-direction: column;
  transition: all 0.3s var(--ease);
}
.case-card:hover { transform: translateY(-6px); box-shadow: var(--sh-md); }
.case-thumb { position: relative; aspect-ratio: 16 / 9; background: var(--c-bg-soft); overflow: hidden; }
.case-thumb img { width: 100%; height: 100%; object-fit: cover; }
.case-badge {
  position: absolute; top: 14px; left: 14px;
  background: rgba(10, 28, 61, 0.78);
  color: #fff; font-size: 12px;
  padding: 4px 12px; border-radius: var(--r-pill);
  backdrop-filter: blur(6px);
}
.case-body { padding: 24px; display: flex; flex-direction: column; flex: 1; }
.case-body h3 { font-size: 18px; margin-bottom: 10px; }
.case-body p { font-size: 15px; color: var(--c-text-soft); flex: 1; }
.case-metrics { display: flex; gap: 22px; margin-top: 18px; padding-top: 18px; border-top: 1px dashed var(--c-border); }
.case-metrics div strong { display: block; font-size: 20px; color: var(--c-primary); }
.case-metrics div span { font-size: 12px; color: var(--c-text-mute); }

.logo-wall {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 18px;
  margin-top: 44px;
}
.logo-wall .logo-item {
  height: 78px;
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
  background: #fff;
  display: grid;
  place-items: center;
  color: var(--c-text-mute);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.04em;
  filter: grayscale(1);
  opacity: 0.72;
  transition: all 0.25s var(--ease);
}
.logo-wall .logo-item:hover { filter: none; opacity: 1; transform: translateY(-3px); box-shadow: var(--sh-sm); }
.logo-wall .logo-item img { max-height: 34px; opacity: 0.85; }

/* ---------- 关于 ---------- */
.about-grid { display: grid; grid-template-columns: 0.95fr 1.05fr; gap: 60px; align-items: center; }
.about-visual { position: relative; }
.about-visual img { border-radius: var(--r-lg); box-shadow: var(--sh-md); width: 100%; }
.about-badge {
  position: absolute;
  right: -18px;
  bottom: 34px;
  background: #fff;
  border-radius: var(--r-md);
  box-shadow: var(--sh-lg);
  padding: 18px 22px;
  border: 1px solid var(--c-border);
}
.about-badge strong { font-size: 26px; color: var(--c-primary); display: block; line-height: 1.2; }
.about-badge span { font-size: 13px; color: var(--c-text-mute); }

.check-list li {
  position: relative;
  padding-left: 30px;
  margin-bottom: 12px;
  color: var(--c-text-soft);
  font-size: 16px;
}
.check-list li::before {
  content: "";
  position: absolute;
  left: 0; top: 10px;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: rgba(16, 87, 216, 0.1) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%231057d8' stroke-width='3.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E") center / 11px no-repeat;
}

/* ---------- 页面内页头 ---------- */
.page-hero {
  position: relative;
  padding: calc(var(--h-header) + 78px) 0 78px;
  background:
    radial-gradient(700px 340px at 82% 10%, rgba(0, 194, 199, 0.18), transparent 62%),
    linear-gradient(180deg, #0a1c3d 0%, #123063 100%);
  color: #fff;
  overflow: hidden;
}
.page-hero::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 54px 54px;
  mask-image: radial-gradient(ellipse 70% 70% at 60% 0%, #000, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 70% 70% at 60% 0%, #000, transparent 100%);
}
.page-hero .container { position: relative; z-index: 1; }
.page-hero h1 { font-size: clamp(28px, 3.6vw, 44px); margin: 14px 0 16px; }
.page-hero p { color: rgba(255, 255, 255, 0.74); font-size: 17px; max-width: 680px; }

.breadcrumb { display: flex; align-items: center; gap: 10px; font-size: 13px; color: rgba(255, 255, 255, 0.6); }
.breadcrumb a:hover { color: #fff; }
.breadcrumb span.sep { opacity: 0.5; }

/* ---------- 通用内容块 ---------- */
.feature-row { display: grid; grid-template-columns: 1fr 1fr; gap: 52px; align-items: center; }
.feature-row.reverse .feature-visual { order: -1; }
.feature-visual img { border-radius: var(--r-lg); box-shadow: var(--sh-md); width: 100%; aspect-ratio: 3 / 2; object-fit: cover; }

.number-list { counter-reset: step; }
.number-list li {
  counter-increment: step;
  position: relative;
  padding: 20px 0 20px 62px;
  border-bottom: 1px solid var(--c-border);
}
.number-list li:last-child { border-bottom: none; }
.number-list li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0; top: 20px;
  width: 40px; height: 40px;
  border-radius: 12px;
  display: grid; place-items: center;
  background: rgba(16, 87, 216, 0.08);
  color: var(--c-primary);
  font-weight: 700;
  font-size: 14px;
}
.number-list h4 { font-size: 17px; margin-bottom: 4px; }
.number-list p { font-size: 15px; color: var(--c-text-soft); }

.info-card {
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  padding: 28px 26px;
  height: 100%;
  transition: all 0.28s var(--ease);
}
.info-card:hover { box-shadow: var(--sh-md); transform: translateY(-4px); }
.info-card h4 { font-size: 17px; margin-bottom: 10px; display: flex; align-items: center; gap: 10px; }
.info-card p { font-size: 15px; color: var(--c-text-soft); }

.scenario-card {
  background: #fff;
  border: 1px solid var(--c-border);
  border-left: 3px solid var(--c-primary);
  border-radius: var(--r-md);
  padding: 22px 24px;
  height: 100%;
}
.scenario-card h4 { font-size: 17px; margin-bottom: 8px; }
.scenario-card p { font-size: 15px; color: var(--c-text-soft); }

.benefit-item {
  display: flex;
  gap: 14px;
  padding: 20px;
  border-radius: var(--r-md);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  height: 100%;
}
.benefit-item .bi { flex: none; width: 34px; height: 34px; border-radius: 10px; display: grid; place-items: center; background: rgba(0, 194, 199, 0.18); color: #7ef0f3; }
.benefit-item h4 { font-size: 16px; margin-bottom: 6px; }
.benefit-item p { font-size: 14px; color: rgba(255, 255, 255, 0.7); }

/* ---------- 流程时间轴 ---------- */
.flow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: flow; }
.flow-item { position: relative; padding-top: 34px; }
.flow-item::before {
  counter-increment: flow;
  content: counter(flow);
  position: absolute;
  top: 0; left: 0;
  width: 26px; height: 26px;
  border-radius: 50%;
  background: var(--c-primary);
  color: #fff;
  font-size: 13px; font-weight: 700;
  display: grid; place-items: center;
  z-index: 2;
}
.flow-item::after {
  content: "";
  position: absolute;
  top: 12px; left: 26px; right: -14px;
  height: 1px;
  background: repeating-linear-gradient(90deg, var(--c-border) 0 6px, transparent 6px 12px);
}
.flow-item:last-child::after { display: none; }
.flow-item h4 { font-size: 17px; margin-bottom: 8px; }
.flow-item p { font-size: 14px; color: var(--c-text-soft); }

/* ---------- FAQ ---------- */
.faq-item { border: 1px solid var(--c-border); border-radius: var(--r-md); background: #fff; margin-bottom: 14px; overflow: hidden; }
.faq-q { width: 100%; text-align: left; padding: 18px 22px; background: none; border: 0; font-size: 16px; font-weight: 600; color: var(--c-text); cursor: pointer; display: flex; justify-content: space-between; align-items: center; gap: 16px; }
.faq-q::after { content: "+"; font-size: 22px; color: var(--c-primary); font-weight: 400; line-height: 1; }
.faq-item.is-open .faq-q::after { content: "−"; }
.faq-a { max-height: 0; overflow: hidden; transition: max-height 0.32s var(--ease); }
.faq-a-inner { padding: 0 22px 20px; color: var(--c-text-soft); font-size: 15px; }

/* ---------- 联系 / 表单 ---------- */
.contact-grid { display: grid; grid-template-columns: 0.85fr 1.15fr; gap: 44px; align-items: start; }

.contact-card {
  background: linear-gradient(165deg, #0a1c3d, #143a72);
  color: #fff;
  border-radius: var(--r-lg);
  padding: 38px 34px;
  box-shadow: var(--sh-lg);
}
.contact-card h3 { font-size: 22px; margin-bottom: 10px; }
.contact-card > p { color: rgba(255, 255, 255, 0.7); font-size: 15px; margin-bottom: 28px; }
.contact-item { display: flex; gap: 14px; margin-bottom: 22px; }
.contact-item .ci { flex: none; width: 40px; height: 40px; border-radius: 12px; display: grid; place-items: center; background: rgba(255, 255, 255, 0.1); color: #7ef0f3; }
.contact-item span { display: block; font-size: 12px; color: rgba(255, 255, 255, 0.55); letter-spacing: 0.06em; }
.contact-item strong { font-size: 16px; font-weight: 600; }
.contact-item a:hover { color: #7ef0f3; }

.form-card {
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  padding: 38px 34px;
  box-shadow: var(--sh-md);
}
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.field { display: flex; flex-direction: column; gap: 8px; }
.field.full { grid-column: 1 / -1; }
.field label { font-size: 14px; font-weight: 600; color: var(--c-text); }
.field label .req { color: #e5484d; margin-left: 3px; }
.field input, .field select, .field textarea {
  width: 100%;
  padding: 13px 15px;
  border: 1px solid var(--c-border);
  border-radius: var(--r-sm);
  font-size: 15px;
  font-family: inherit;
  color: var(--c-text);
  background: #fbfcfe;
  transition: all 0.2s var(--ease);
}
.field textarea { resize: vertical; min-height: 128px; }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none;
  border-color: var(--c-primary);
  background: #fff;
  box-shadow: 0 0 0 4px rgba(16, 87, 216, 0.1);
}
.field .hint { font-size: 12px; color: var(--c-text-mute); }
.field.has-error input, .field.has-error textarea, .field.has-error select { border-color: #e5484d; background: #fff5f5; }
.field .err-msg { font-size: 12px; color: #e5484d; display: none; }
.field.has-error .err-msg { display: block; }

.form-agree { display: flex; align-items: flex-start; gap: 10px; font-size: 13px; color: var(--c-text-soft); margin: 18px 0 22px; }
.form-agree input { margin-top: 3px; accent-color: var(--c-primary); }
.form-agree a { color: var(--c-primary); text-decoration: underline; }

/* 蜜罐字段：对真人不可见，仅用于拦截机器人 */
.hp-input {
  position: absolute !important;
  left: -9999px !important;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.form-status { display: none; margin-top: 18px; padding: 14px 18px; border-radius: var(--r-sm); font-size: 14px; }
.form-status.is-show { display: block; }
.form-status.ok { background: #e9f9ee; color: #14713c; border: 1px solid #b6e6c6; }
.form-status.err { background: #fdeeee; color: #a52428; border: 1px solid #f5c2c2; }

/* ---------- CTA 横幅 ---------- */
.cta-band {
  position: relative;
  background: linear-gradient(120deg, #0a1c3d 0%, #17427f 55%, #1057d8 100%);
  color: #fff;
  border-radius: var(--r-lg);
  padding: 56px 54px;
  overflow: hidden;
  box-shadow: var(--sh-lg);
}
.cta-band::before {
  content: "";
  position: absolute;
  right: -80px; top: -80px;
  width: 340px; height: 340px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 194, 199, 0.32), transparent 68%);
}
.cta-band-inner { position: relative; z-index: 1; display: flex; align-items: center; justify-content: space-between; gap: 32px; flex-wrap: wrap; }
.cta-band h2 { font-size: clamp(24px, 2.6vw, 34px); margin-bottom: 10px; }
.cta-band p { color: rgba(255, 255, 255, 0.74); }

/* ---------- 页脚 ---------- */
.site-footer { background: #071630; color: rgba(255, 255, 255, 0.66); padding: 72px 0 0; font-size: 14px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 46px; }
.site-footer h5 { color: #fff; font-size: 15px; margin-bottom: 18px; letter-spacing: 0.04em; }
.site-footer .footer-logo { display: flex; align-items: center; gap: 12px; margin-bottom: 18px; }
.site-footer .footer-logo img { height: 40px; }
.site-footer .footer-logo strong { color: #fff; font-size: 17px; }
.site-footer p { line-height: 1.9; }
.site-footer li { margin-bottom: 10px; }
.site-footer a { transition: color 0.2s var(--ease); }
.site-footer a:hover { color: #fff; }
.footer-contact li { display: flex; gap: 10px; }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 22px 0 30px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.45);
}

/* ---------- 长文排版（隐私说明等） ---------- */
.prose { max-width: 820px; margin: 0 auto; }
.prose h2 { font-size: 20px; margin: 36px 0 12px; }
.prose h2:first-child { margin-top: 0; }
.prose p, .prose li { color: var(--c-text-soft); font-size: 15.5px; line-height: 1.95; }
.prose p { margin: 0 0 12px; }
.prose ul { list-style: disc; padding-left: 22px; margin: 8px 0 16px; }
.prose li { margin-bottom: 6px; }
.prose .updated { font-size: 13px; color: var(--c-text-mute); margin-bottom: 26px; }
.prose a { color: var(--c-primary); text-decoration: underline; }

/* ---------- 滚动动画（仅在 JS 可用时隐藏，避免无脚本环境出现空白） ---------- */
.js .reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.7s var(--ease), transform 0.7s var(--ease); }
.js .reveal.is-visible { opacity: 1; transform: none; }

/* ---------- 返回顶部 ---------- */
.to-top {
  position: fixed;
  right: 24px; bottom: 24px;
  width: 46px; height: 46px;
  border-radius: 50%;
  border: 1px solid var(--c-border);
  background: #fff;
  color: var(--c-primary);
  display: grid; place-items: center;
  cursor: pointer;
  box-shadow: var(--sh-md);
  opacity: 0; visibility: hidden;
  transform: translateY(10px);
  transition: all 0.28s var(--ease);
  z-index: 90;
}
.to-top.is-show { opacity: 1; visibility: visible; transform: none; }
.to-top:hover { background: var(--c-primary); color: #fff; border-color: var(--c-primary); }

/* ---------- 移动端抽屉 ---------- */
.mobile-nav {
  position: fixed;
  inset: var(--h-header) 0 0 0;
  background: #fff;
  z-index: 99;
  padding: 20px 24px 40px;
  overflow-y: auto;
  transform: translateX(100%);
  transition: transform 0.32s var(--ease);
  display: none;
}
.mobile-nav.is-open { transform: none; }
.mobile-nav a { display: block; padding: 15px 0; border-bottom: 1px solid var(--c-border); font-size: 16px; font-weight: 500; }
.mobile-nav .m-sub a { padding: 12px 0 12px 18px; font-size: 15px; color: var(--c-text-soft); border-bottom: 1px dashed var(--c-border); }
.mobile-nav .btn { margin-top: 26px; width: 100%; }

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .flow { grid-template-columns: repeat(2, 1fr); gap: 26px; }
  .flow-item::after { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .logo-wall { grid-template-columns: repeat(3, 1fr); }
  .hero-grid { gap: 36px; }
}

@media (max-width: 900px) {
  .nav, .header-cta .btn, .header-phone { display: none; }
  .burger { display: block; }
  .mobile-nav { display: block; }
  .hero-grid, .about-grid, .feature-row, .contact-grid { grid-template-columns: 1fr; }
  .feature-row.reverse .feature-visual { order: 0; }
  .grid--3 { grid-template-columns: 1fr 1fr; }
  .hero-float-card { left: 14px; bottom: -18px; }
  .about-badge { right: 14px; }
  .section { padding: 70px 0; }
  .cta-band { padding: 40px 28px; }
}

@media (max-width: 640px) {
  body { font-size: 15px; }
  .container { padding: 0 18px; }
  .grid--2, .grid--3, .grid--4, .form-grid { grid-template-columns: 1fr; }
  .flow { grid-template-columns: 1fr; }
  .hero { padding: calc(var(--h-header) + 56px) 0 80px; }
  .hero-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 20px 16px; }
  .hero-stats .num { font-size: 26px; }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
  .logo-wall { grid-template-columns: repeat(2, 1fr); }
  .form-card, .contact-card { padding: 26px 20px; }
  .section-head { margin-bottom: 34px; }
  .page-hero { padding: calc(var(--h-header) + 54px) 0 54px; }
  .to-top { right: 14px; bottom: 14px; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  .reveal { opacity: 1 !important; transform: none !important; }
}