/* ============================================
   数河科技 SHUHE TECH — 设计系统
   苹果风毛玻璃 · 浅色科技感
   ============================================ */

:root {
  --bg: #f5f7fb;
  --text: #1d1d1f;
  --text-2: #4b5563;
  --text-3: #86868b;
  --accent: #2563eb;
  --accent-2: #7c3aed;
  --accent-3: #06b6d4;
  --glass: rgba(255, 255, 255, 0.55);
  --glass-strong: rgba(255, 255, 255, 0.72);
  --glass-border: rgba(255, 255, 255, 0.65);
  --shadow: 0 8px 32px rgba(31, 38, 135, 0.08);
  --shadow-lg: 0 20px 60px rgba(31, 38, 135, 0.14);
  --radius: 22px;
  --nav-h: 64px;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro SC", "PingFang SC",
    "Helvetica Neue", "Microsoft YaHei", sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

/* ---------- 渐变光斑背景 ---------- */
.bg-mesh {
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(ellipse 60% 50% at 12% 8%, rgba(37, 99, 235, 0.14), transparent 60%),
    radial-gradient(ellipse 50% 45% at 88% 12%, rgba(124, 58, 237, 0.12), transparent 60%),
    radial-gradient(ellipse 55% 50% at 85% 85%, rgba(6, 182, 212, 0.12), transparent 60%),
    radial-gradient(ellipse 45% 40% at 8% 88%, rgba(147, 51, 234, 0.08), transparent 60%),
    var(--bg);
}

.bg-grid {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(29, 29, 31, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(29, 29, 31, 0.025) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, #000 30%, transparent 75%);
}

/* ---------- 毛玻璃导航 ---------- */
.nav {
  position: fixed;
  top: 12px;
  left: 50%;
  transform: translateX(-50%);
  width: min(1120px, calc(100% - 32px));
  height: var(--nav-h);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 22px;
  border-radius: 18px;
  background: var(--glass);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 17px;
  letter-spacing: 0.5px;
}

.logo-mark {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  font-size: 15px;
  font-weight: 800;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
}

.nav-logo small {
  font-size: 11px;
  font-weight: 500;
  color: var(--text-3);
  letter-spacing: 1.5px;
  display: block;
  line-height: 1.1;
}

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

.nav-links a {
  padding: 8px 16px;
  border-radius: 12px;
  font-size: 14.5px;
  font-weight: 500;
  color: var(--text-2);
  transition: all 0.25s ease;
}

.nav-links a:hover {
  color: var(--text);
  background: rgba(0, 0, 0, 0.05);
}

.nav-links a.active {
  color: var(--accent);
  background: rgba(37, 99, 235, 0.1);
  font-weight: 600;
}

.nav-cta {
  padding: 9px 20px;
  border-radius: 12px;
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.35);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.45);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  width: 20px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all 0.3s;
}

/* ---------- 通用布局 ---------- */
.container {
  width: min(1120px, calc(100% - 48px));
  margin: 0 auto;
}

.section { padding: 96px 0; }

.section-head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 56px;
}

.eyebrow {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 999px;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--accent);
  background: rgba(37, 99, 235, 0.08);
  border: 1px solid rgba(37, 99, 235, 0.18);
  margin-bottom: 16px;
}

.section-head h2 {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  letter-spacing: -0.5px;
  line-height: 1.25;
  margin-bottom: 14px;
}

.section-head p {
  color: var(--text-2);
  font-size: 16.5px;
}

/* ---------- 毛玻璃卡片 ---------- */
.glass {
  background: var(--glass);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.card {
  padding: 34px 30px;
  transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1),
    box-shadow 0.35s ease;
}

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

.card .icon {
  width: 52px;
  height: 52px;
  border-radius: 15px;
  display: grid;
  place-items: center;
  margin-bottom: 20px;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.12), rgba(124, 58, 237, 0.12));
  border: 1px solid rgba(37, 99, 235, 0.15);
}

.card .icon svg {
  width: 26px;
  height: 26px;
  stroke: var(--accent);
}

.card h3 {
  font-size: 19px;
  font-weight: 700;
  margin-bottom: 10px;
}

.card p {
  font-size: 14.5px;
  color: var(--text-2);
}

/* 网格 */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

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

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 30px;
  border-radius: 14px;
  font-size: 15.5px;
  font-weight: 600;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s;
  cursor: pointer;
  border: none;
  font-family: var(--font);
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 6px 24px rgba(37, 99, 235, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 32px rgba(37, 99, 235, 0.45);
}

.btn-glass {
  color: var(--text);
  background: var(--glass-strong);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow);
}

.btn-glass:hover {
  transform: translateY(-2px);
  background: rgba(255, 255, 255, 0.9);
}

/* ---------- Hero ---------- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: calc(var(--nav-h) + 60px) 0 80px;
  position: relative;
}

.hero-inner {
  max-width: 780px;
  margin: 0 auto;
  text-align: center;
}

.hero h1 {
  font-size: clamp(36px, 6vw, 64px);
  font-weight: 800;
  letter-spacing: -1.5px;
  line-height: 1.15;
  margin-bottom: 22px;
}

.gradient-text {
  background: linear-gradient(120deg, var(--accent) 20%, var(--accent-2) 55%, var(--accent-3) 90%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p {
  font-size: clamp(16px, 2vw, 19px);
  color: var(--text-2);
  max-width: 620px;
  margin: 0 auto 38px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  border-radius: 999px;
  font-size: 13.5px;
  font-weight: 500;
  color: var(--text-2);
  background: var(--glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow);
  margin-bottom: 28px;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #34c759;
  position: relative;
}

.pulse-dot::after {
  content: "";
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 2px solid rgba(52, 199, 89, 0.4);
  animation: pulse 2s ease-out infinite;
}

@keyframes pulse {
  0% { transform: scale(0.6); opacity: 1; }
  100% { transform: scale(1.6); opacity: 0; }
}

/* ---------- 数据统计 ---------- */
.stats-band {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 72px;
}

.stat {
  text-align: center;
  padding: 30px 16px;
}

.stat .num {
  font-size: clamp(30px, 4vw, 42px);
  font-weight: 800;
  letter-spacing: -1px;
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat .label {
  font-size: 13.5px;
  color: var(--text-3);
  margin-top: 4px;
}

/* ---------- 页面小 Hero ---------- */
.page-hero {
  padding: calc(var(--nav-h) + 110px) 0 60px;
  text-align: center;
}

.page-hero h1 {
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: 16px;
}

.page-hero p {
  color: var(--text-2);
  font-size: 17px;
  max-width: 640px;
  margin: 0 auto;
}

/* ---------- 特性列表 ---------- */
.feature-row {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  margin-bottom: 18px;
}

.check {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.15), rgba(124, 58, 237, 0.15));
  margin-top: 3px;
}

.check svg {
  width: 12px;
  height: 12px;
  stroke: var(--accent);
  stroke-width: 3;
}

.feature-row p {
  font-size: 14.5px;
  color: var(--text-2);
}

.feature-row strong {
  color: var(--text);
}

/* ---------- 标签 ---------- */
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.tag {
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 12.5px;
  font-weight: 500;
  color: var(--accent);
  background: rgba(37, 99, 235, 0.08);
  border: 1px solid rgba(37, 99, 235, 0.15);
}

/* ---------- 时间线 ---------- */
.timeline {
  position: relative;
  max-width: 720px;
  margin: 0 auto;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 19px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--accent), var(--accent-2), var(--accent-3));
  opacity: 0.35;
}

.tl-item {
  position: relative;
  padding: 0 0 36px 60px;
}

.tl-item:last-child { padding-bottom: 0; }

.tl-dot {
  position: absolute;
  left: 11px;
  top: 4px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 0 5px rgba(37, 99, 235, 0.15);
}

.tl-item h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 6px;
}

.tl-item .tl-time {
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 1px;
}

.tl-item p {
  color: var(--text-2);
  font-size: 14.5px;
}

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

.form-field { display: flex; flex-direction: column; gap: 8px; }
.form-field.full { grid-column: 1 / -1; }

.form-field label {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--text-2);
}

.form-field input,
.form-field select,
.form-field textarea {
  font-family: var(--font);
  font-size: 15px;
  padding: 13px 16px;
  border-radius: 13px;
  border: 1px solid rgba(0, 0, 0, 0.08);
  background: rgba(255, 255, 255, 0.7);
  color: var(--text);
  outline: none;
  transition: border-color 0.25s, box-shadow 0.25s;
  width: 100%;
}

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

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.12);
}

/* ---------- 表单：蜜罐字段 / 提交状态 / 说明 ---------- */
.hp-field {
  position: absolute;
  left: -9999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.form-status,
.form-hint {
  grid-column: 1 / -1;
  margin: 0;
}

.form-status {
  padding: 12px 16px;
  border-radius: 12px;
  font-size: 13.5px;
  line-height: 1.65;
}

.form-status.info {
  background: rgba(37, 99, 235, 0.07);
  border: 1px solid rgba(37, 99, 235, 0.16);
  color: var(--text-2);
}

.form-status.success {
  background: rgba(16, 185, 129, 0.09);
  border: 1px solid rgba(16, 185, 129, 0.24);
  color: #047857;
}

.form-status.error {
  background: rgba(239, 68, 68, 0.07);
  border: 1px solid rgba(239, 68, 68, 0.22);
  color: #b91c1c;
}

.form-status a {
  color: inherit;
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.form-status a:hover {
  opacity: 0.78;
}

.form-hint {
  font-size: 12.5px;
  color: var(--text-3);
  text-align: center;
}

/* ---------- 联系信息卡 ---------- */
.contact-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 20px 0;
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

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

.contact-item .icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: 13px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.12), rgba(124, 58, 237, 0.12));
  border: 1px solid rgba(37, 99, 235, 0.15);
}

.contact-item .icon svg {
  width: 21px;
  height: 21px;
  stroke: var(--accent);
}

.contact-item h4 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 2px;
}

.contact-item p {
  font-size: 14px;
  color: var(--text-2);
}

/* ---------- CTA 横幅 ---------- */
.cta-band {
  text-align: center;
  padding: 72px 40px;
  position: relative;
  overflow: hidden;
}

.cta-band::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 70% 90% at 20% 10%, rgba(37, 99, 235, 0.16), transparent 60%),
    radial-gradient(ellipse 60% 80% at 80% 90%, rgba(124, 58, 237, 0.16), transparent 60%);
  pointer-events: none;
}

.cta-band h2 {
  font-size: clamp(26px, 4vw, 38px);
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: 14px;
  position: relative;
}

.cta-band p {
  color: var(--text-2);
  margin-bottom: 30px;
  position: relative;
}

.cta-band .btn { position: relative; }

/* ---------- 页脚 ---------- */
.footer {
  margin-top: 40px;
  padding: 56px 0 32px;
  border-top: 1px solid rgba(0, 0, 0, 0.06);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 44px;
}

.footer h4 {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 16px;
}

.footer-links a {
  display: block;
  font-size: 13.5px;
  color: var(--text-3);
  padding: 5px 0;
  transition: color 0.2s;
}

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

.footer-desc {
  font-size: 13.5px;
  color: var(--text-3);
  max-width: 300px;
  margin-top: 14px;
}

.footer-bottom {
  border-top: 1px solid rgba(0, 0, 0, 0.06);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 12.5px;
  color: var(--text-3);
}

.footer-bottom a {
  color: var(--text-3);
  text-decoration: none;
  transition: color 0.2s ease;
}

.footer-bottom a:hover {
  color: var(--text);
}

/* ---------- 动画 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.8s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
}

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

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  .grid-3 { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .stats-band { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .section { padding: 72px 0; }
}

@media (max-width: 720px) {
  .nav-toggle { display: flex; }

  .nav-links {
    position: absolute;
    top: calc(var(--nav-h) + 10px);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    padding: 12px;
    border-radius: 18px;
    background: var(--glass-strong);
    backdrop-filter: blur(28px) saturate(180%);
    -webkit-backdrop-filter: blur(28px) saturate(180%);
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-lg);
    display: none;
  }

  .nav-links.open { display: flex; }
  .nav-links a { text-align: center; padding: 13px; }
  .nav-cta { display: none; }

  .form-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero { min-height: auto; }
}