/* ============================================
   博渔派 BYP 官网样式
   主题：深海声呐 · 暗色海洋科技风
   ============================================ */

/* ---------- CSS 变量 ---------- */
:root {
  --bg-deep:    #040b18;
  --bg-base:    #071020;
  --bg-surface: #0d1f38;
  --bg-card:    #101e33;
  --bg-glass:   rgba(13, 31, 56, 0.75);

  --brand:      #175EE4;
  --brand-light:#5DA8E5;
  --cyan:       #00d4ff;
  --cyan-dim:   rgba(0, 212, 255, 0.12);
  --teal:       #00c9a7;

  --text-hi:    #e8f2ff;
  --text-mid:   #8aadd4;
  --text-lo:    #4a6d94;

  --border:     rgba(93, 168, 229, 0.15);
  --border-hi:  rgba(0, 212, 255, 0.3);

  --glow:       0 0 40px rgba(23, 94, 228, 0.35);
  --glow-cyan:  0 0 30px rgba(0, 212, 255, 0.25);

  --font-display: 'Outfit', 'Noto Sans SC', sans-serif;
  --font-body:    'Noto Sans SC', 'Outfit', sans-serif;

  --radius-sm:  8px;
  --radius-md:  14px;
  --radius-lg:  22px;
  --radius-xl:  32px;

  --nav-h: 68px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

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

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

/* ---------- 滚动条 ---------- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-deep); }
::-webkit-scrollbar-thumb { background: var(--brand); border-radius: 3px; }

/* ---------- 背景网格纹理 ---------- */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(23,94,228,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(23,94,228,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: 0;
}

/* ============================================
   导航栏
   ============================================ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: 1000;
  display: flex;
  align-items: center;
  padding: 0 clamp(1.5rem, 5vw, 4rem);
  background: rgba(4, 11, 24, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: background 0.3s, box-shadow 0.3s;
}

.nav.scrolled {
  background: rgba(4, 11, 24, 0.97);
  box-shadow: 0 4px 30px rgba(0,0,0,0.5);
}

.nav-inner {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

/* Logo */
.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-shrink: 0;
}

.logo-icon {
  width: 36px; height: 36px;
  position: relative;
}

/* 声呐图标 SVG 动画 */
.logo-icon svg {
  width: 100%; height: 100%;
}

.logo-text {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  background: linear-gradient(135deg, var(--brand-light), var(--cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.logo-sub {
  font-size: 0.65rem;
  color: var(--text-lo);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-top: -2px;
}

/* 导航链接 */
.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-links a {
  font-size: 0.9rem;
  color: var(--text-mid);
  transition: color 0.2s;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 1.5px;
  background: var(--cyan);
  transition: width 0.25s ease;
}

.nav-links a:hover { color: var(--text-hi); }
.nav-links a:hover::after { width: 100%; }

/* 下载按钮 */
.nav-cta {
  background: linear-gradient(135deg, var(--brand), #0e44aa);
  color: #fff !important;
  padding: 0.45rem 1.2rem;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 600;
  border: 1px solid rgba(93,168,229,0.4);
  transition: transform 0.2s, box-shadow 0.2s;
  white-space: nowrap;
}

.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: var(--glow);
}

.nav-cta::after { display: none !important; }

/* 汉堡菜单 */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}

.nav-hamburger span {
  display: block;
  width: 22px; height: 2px;
  background: var(--text-mid);
  border-radius: 2px;
  transition: all 0.3s;
}

.nav-hamburger.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; }
.nav-hamburger.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* 移动端菜单 */
.nav-mobile {
  display: none;
  position: fixed;
  top: var(--nav-h); left: 0; right: 0;
  background: rgba(4, 11, 24, 0.98);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 1.5rem 2rem;
  flex-direction: column;
  gap: 1.2rem;
  z-index: 999;
}

.nav-mobile.open { display: flex; }

.nav-mobile a {
  font-size: 1rem;
  color: var(--text-mid);
  transition: color 0.2s;
}

.nav-mobile a:hover { color: var(--cyan); }

/* ============================================
   Hero 区域
   ============================================ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: calc(var(--nav-h) + 4rem) clamp(1.5rem, 5vw, 4rem) 4rem;
}

/* 声呐背景动画 */
.hero-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

/* 渐变光晕 */
.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  animation: float 8s ease-in-out infinite;
}

.hero-glow-1 {
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(23,94,228,0.3) 0%, transparent 70%);
  top: -100px; right: -100px;
  animation-delay: 0s;
}

.hero-glow-2 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(0,212,255,0.15) 0%, transparent 70%);
  bottom: 10%; left: -50px;
  animation-delay: -3s;
}

.hero-glow-3 {
  width: 300px; height: 300px;
  background: radial-gradient(circle, rgba(0,201,167,0.1) 0%, transparent 70%);
  top: 40%; left: 40%;
  animation-delay: -5s;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33%       { transform: translate(20px, -30px) scale(1.05); }
  66%       { transform: translate(-15px, 20px) scale(0.97); }
}

/* 声呐同心圆 */
.sonar-rings {
  position: absolute;
  right: 5%;
  top: 50%;
  transform: translateY(-50%);
  width: 500px; height: 500px;
}

.sonar-ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 1px solid rgba(0, 212, 255, 0.15);
  animation: sonar-pulse 4s ease-out infinite;
}

.sonar-ring:nth-child(2) { animation-delay: 1s; }
.sonar-ring:nth-child(3) { animation-delay: 2s; }
.sonar-ring:nth-child(4) { animation-delay: 3s; }

@keyframes sonar-pulse {
  0%   { transform: scale(0.3); opacity: 0.8; }
  100% { transform: scale(1.2); opacity: 0; }
}

/* 水面波纹线 */
.wave-lines {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 200px;
  overflow: hidden;
}

.wave-line {
  position: absolute;
  bottom: 0; left: -10%;
  width: 120%;
  height: 100px;
  background: repeating-linear-gradient(
    90deg,
    transparent,
    transparent 40px,
    rgba(0,212,255,0.04) 40px,
    rgba(0,212,255,0.04) 41px
  );
}

.hero-inner {
  position: relative;
  z-index: 1;
  max-width: 1280px;
  margin: 0 auto;
  width: 100%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

/* 左侧文案 */
.hero-content { animation: fadeUp 0.8s ease both; }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--cyan-dim);
  border: 1px solid var(--border-hi);
  border-radius: 50px;
  padding: 0.3rem 1rem;
  font-size: 0.78rem;
  color: var(--cyan);
  letter-spacing: 0.08em;
  margin-bottom: 1.5rem;
  animation: fadeUp 0.8s 0.1s ease both;
}

.badge-dot {
  width: 6px; height: 6px;
  background: var(--cyan);
  border-radius: 50%;
  animation: blink 2s ease-in-out infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.3; }
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
  animation: fadeUp 0.8s 0.2s ease both;
}

.hero-title .gradient-text {
  background: linear-gradient(135deg, var(--brand-light) 0%, var(--cyan) 60%, var(--teal) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--text-mid);
  margin-bottom: 2rem;
  max-width: 480px;
  line-height: 1.8;
  animation: fadeUp 0.8s 0.3s ease both;
}

.hero-desc {
  font-size: 0.9rem;
  color: var(--text-lo);
  margin-bottom: 2.5rem;
  max-width: 440px;
  animation: fadeUp 0.8s 0.35s ease both;
}

/* 下载按钮组 */
.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  animation: fadeUp 0.8s 0.4s ease both;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 1.8rem;
  border-radius: 50px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: transform 0.2s, box-shadow 0.2s;
  font-family: var(--font-body);
}

.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn-primary {
  background: linear-gradient(135deg, var(--brand), #0e44aa);
  color: #fff;
  box-shadow: 0 4px 20px rgba(23,94,228,0.4);
  border: 1px solid rgba(93,168,229,0.3);
}

.btn-primary:hover { box-shadow: var(--glow); }

.btn-outline {
  background: transparent;
  color: var(--text-hi);
  border: 1.5px solid var(--border-hi);
}

.btn-outline:hover {
  background: var(--cyan-dim);
  border-color: var(--cyan);
  color: var(--cyan);
}

.btn-icon {
  width: 20px; height: 20px;
  flex-shrink: 0;
}

/* 统计数据 */
.hero-stats {
  display: flex;
  gap: 2.5rem;
  margin-top: 3rem;
  animation: fadeUp 0.8s 0.5s ease both;
}

.stat-item { text-align: left; }

.stat-num {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--cyan);
  line-height: 1;
}

.stat-label {
  font-size: 0.75rem;
  color: var(--text-lo);
  margin-top: 0.3rem;
  letter-spacing: 0.05em;
}

/* 右侧手机模型 */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  animation: fadeUp 0.8s 0.3s ease both;
}

.phone-mockup {
  position: relative;
  width: 280px;
}

.phone-frame {
  width: 280px;
  height: 560px;
  background: linear-gradient(160deg, #1a2d4a 0%, #0d1b2e 100%);
  border-radius: 40px;
  border: 2px solid rgba(93,168,229,0.25);
  box-shadow:
    0 0 0 1px rgba(0,0,0,0.5),
    0 30px 80px rgba(0,0,0,0.6),
    var(--glow);
  overflow: hidden;
  position: relative;
}

/* 手机屏幕内容 */
.phone-screen {
  width: 100%; height: 100%;
  background: linear-gradient(180deg, #050f1e 0%, #071828 100%);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* 手机状态栏 */
.phone-status-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 18px 8px;
  font-size: 0.65rem;
  color: var(--text-lo);
}

/* 声呐屏幕模拟 */
.sonar-display {
  flex: 1;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.sonar-screen-bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 100%, rgba(0,80,160,0.3) 0%, transparent 70%);
}

/* 声呐扫描线 */
.sonar-sweep {
  position: absolute;
  width: 200%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--cyan), transparent);
  top: 50%;
  left: -50%;
  transform-origin: center;
  animation: sweep 3s linear infinite;
  opacity: 0.6;
}

@keyframes sweep {
  0%   { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* 鱼群点 */
.fish-dots {
  position: absolute;
  inset: 0;
}

.fish-dot {
  position: absolute;
  border-radius: 50%;
  background: var(--cyan);
  animation: fishBlink 2s ease-in-out infinite;
}

.fish-dot:nth-child(1) { width: 6px; height: 6px; top: 30%; left: 35%; animation-delay: 0s; }
.fish-dot:nth-child(2) { width: 4px; height: 4px; top: 45%; left: 60%; animation-delay: 0.5s; }
.fish-dot:nth-child(3) { width: 8px; height: 8px; top: 60%; left: 40%; animation-delay: 1s; }
.fish-dot:nth-child(4) { width: 5px; height: 5px; top: 25%; left: 65%; animation-delay: 1.5s; }
.fish-dot:nth-child(5) { width: 3px; height: 3px; top: 70%; left: 55%; animation-delay: 0.8s; }

@keyframes fishBlink {
  0%, 100% { opacity: 0.4; transform: scale(1); }
  50%       { opacity: 1; transform: scale(1.3); }
}

/* 深度标尺 */
.depth-scale {
  position: absolute;
  right: 8px;
  top: 10%;
  bottom: 10%;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  font-size: 0.55rem;
  color: var(--text-lo);
}

/* 手机底部信息栏 */
.phone-info-bar {
  padding: 10px 16px;
  background: rgba(7, 16, 32, 0.9);
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.info-item {
  text-align: center;
}

.info-val {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--cyan);
}

.info-label {
  font-size: 0.55rem;
  color: var(--text-lo);
}

/* 连接状态 */
.conn-status {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 0.6rem;
  color: var(--teal);
}

.conn-dot {
  width: 5px; height: 5px;
  background: var(--teal);
  border-radius: 50%;
  animation: blink 1.5s ease-in-out infinite;
}

/* 手机浮动装饰 */
.phone-float-card {
  position: absolute;
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-hi);
  border-radius: var(--radius-md);
  padding: 0.7rem 1rem;
  font-size: 0.75rem;
  box-shadow: var(--glow-cyan);
  animation: floatCard 4s ease-in-out infinite;
}

.float-card-1 {
  top: 15%;
  right: -60px;
  animation-delay: 0s;
}

.float-card-2 {
  bottom: 20%;
  left: -70px;
  animation-delay: -2s;
}

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

.float-card-icon {
  font-size: 1.2rem;
  margin-bottom: 0.2rem;
}

.float-card-val {
  font-weight: 700;
  color: var(--cyan);
  font-size: 0.85rem;
}

.float-card-label {
  color: var(--text-lo);
  font-size: 0.65rem;
}

/* ============================================
   通用 Section
   ============================================ */
.section {
  padding: 6rem clamp(1.5rem, 5vw, 4rem);
  position: relative;
  z-index: 1;
}

.section-inner {
  max-width: 1280px;
  margin: 0 auto;
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 1rem;
}

.section-tag::before,
.section-tag::after {
  content: '';
  display: block;
  width: 20px; height: 1px;
  background: var(--cyan);
  opacity: 0.5;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 1rem;
}

.section-desc {
  font-size: 1rem;
  color: var(--text-mid);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.8;
}

/* 分隔线 */
.section-divider {
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-hi), transparent);
  margin: 0 auto;
}

/* ============================================
   功能特性
   ============================================ */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  position: relative;
  overflow: hidden;
  transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--brand), var(--cyan));
  opacity: 0;
  transition: opacity 0.3s;
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-hi);
  box-shadow: var(--glow-cyan);
}

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

.feature-icon {
  width: 52px; height: 52px;
  background: linear-gradient(135deg, rgba(23,94,228,0.2), rgba(0,212,255,0.1));
  border: 1px solid var(--border-hi);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1.2rem;
}

.feature-title {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.6rem;
  color: var(--text-hi);
}

.feature-desc {
  font-size: 0.88rem;
  color: var(--text-mid);
  line-height: 1.75;
}

.feature-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 1rem;
}

.feature-tag {
  font-size: 0.7rem;
  padding: 0.2rem 0.6rem;
  background: rgba(23,94,228,0.12);
  border: 1px solid rgba(23,94,228,0.25);
  border-radius: 50px;
  color: var(--brand-light);
}

/* 大卡片（跨两列） */
.feature-card.wide {
  grid-column: span 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: center;
}

.feature-visual {
  background: linear-gradient(135deg, rgba(23,94,228,0.08), rgba(0,212,255,0.05));
  border-radius: var(--radius-md);
  height: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

/* 水波形可视化 */
.water-wave {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 60%;
}

.wave-bar {
  position: absolute;
  bottom: 0;
  width: 4px;
  background: linear-gradient(to top, var(--brand), var(--cyan));
  border-radius: 2px 2px 0 0;
  animation: waveBar 2s ease-in-out infinite;
}

@keyframes waveBar {
  0%, 100% { transform: scaleY(0.4); }
  50%       { transform: scaleY(1); }
}

/* ============================================
   工作流程
   ============================================ */
.steps-section {
  background: var(--bg-base);
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  position: relative;
}

/* 连接线 */
.steps-grid::before {
  content: '';
  position: absolute;
  top: 40px;
  left: calc(16.67% + 1rem);
  right: calc(16.67% + 1rem);
  height: 1px;
  background: linear-gradient(90deg, var(--brand), var(--cyan), var(--teal));
  opacity: 0.4;
  z-index: 0;
}

.step-card {
  text-align: center;
  position: relative;
  z-index: 1;
}

.step-num {
  width: 80px; height: 80px;
  margin: 0 auto 1.5rem;
  background: var(--bg-card);
  border: 2px solid var(--border-hi);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--cyan);
  box-shadow: var(--glow-cyan);
  position: relative;
}

.step-num::after {
  content: '';
  position: absolute;
  inset: -6px;
  border-radius: 50%;
  border: 1px solid rgba(0,212,255,0.15);
  animation: sonar-pulse 3s ease-out infinite;
}

.step-title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.6rem;
}

.step-desc {
  font-size: 0.88rem;
  color: var(--text-mid);
  line-height: 1.75;
}

/* ============================================
   产品亮点数据
   ============================================ */
.highlights {
  background: linear-gradient(180deg, var(--bg-deep) 0%, var(--bg-base) 50%, var(--bg-deep) 100%);
}

.highlights-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.highlight-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem 1.5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
  transition: border-color 0.3s, transform 0.3s;
}

.highlight-card:hover {
  border-color: var(--border-hi);
  transform: translateY(-3px);
}

.highlight-card::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--brand), var(--cyan));
}

.highlight-icon {
  font-size: 2rem;
  margin-bottom: 0.8rem;
}

.highlight-val {
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--brand-light), var(--cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 0.4rem;
}

.highlight-label {
  font-size: 0.82rem;
  color: var(--text-mid);
}

/* ============================================
   会员/PRO 区域
   ============================================ */
.pro-section {
  background: var(--bg-base);
}

.pro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.pro-content {}

.pro-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: linear-gradient(135deg, rgba(255,180,0,0.15), rgba(255,120,0,0.1));
  border: 1px solid rgba(255,180,0,0.3);
  border-radius: 50px;
  padding: 0.3rem 1rem;
  font-size: 0.78rem;
  color: #ffb400;
  letter-spacing: 0.08em;
  margin-bottom: 1.5rem;
}

.pro-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  font-weight: 800;
  margin-bottom: 1rem;
  line-height: 1.2;
}

.pro-title span {
  background: linear-gradient(135deg, #ffb400, #ff8c00);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.pro-desc {
  font-size: 0.95rem;
  color: var(--text-mid);
  line-height: 1.8;
  margin-bottom: 2rem;
}

.pro-features {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

.pro-feature {
  display: flex;
  align-items: flex-start;
  gap: 0.8rem;
  font-size: 0.9rem;
  color: var(--text-mid);
}

.pro-feature-icon {
  width: 22px; height: 22px;
  background: rgba(255,180,0,0.12);
  border: 1px solid rgba(255,180,0,0.3);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.65rem;
  color: #ffb400;
  flex-shrink: 0;
  margin-top: 2px;
}

/* PRO 卡片视觉 */
.pro-visual {
  display: flex;
  justify-content: center;
}

.pro-card {
  width: 300px;
  background: linear-gradient(145deg, #1a1500 0%, #0d1b2e 50%, #0a1628 100%);
  border: 1px solid rgba(255,180,0,0.3);
  border-radius: var(--radius-xl);
  padding: 2rem;
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5), 0 0 40px rgba(255,180,0,0.08);
}

.pro-card::before {
  content: '';
  position: absolute;
  top: -50%; left: -50%;
  width: 200%; height: 200%;
  background: conic-gradient(from 0deg, transparent 0deg, rgba(255,180,0,0.05) 60deg, transparent 120deg);
  animation: rotate 8s linear infinite;
}

@keyframes rotate {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

.pro-card-inner {
  position: relative;
  z-index: 1;
}

.pro-card-logo {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 800;
  background: linear-gradient(135deg, #ffb400, #ff8c00);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.3rem;
}

.pro-card-sub {
  font-size: 0.72rem;
  color: var(--text-lo);
  letter-spacing: 0.1em;
  margin-bottom: 2rem;
}

.pro-card-items {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.pro-card-item {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  font-size: 0.82rem;
  color: var(--text-mid);
}

.pro-card-item::before {
  content: '✦';
  color: #ffb400;
  font-size: 0.7rem;
}

.pro-card-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,180,0,0.3), transparent);
  margin: 1.5rem 0;
}

.pro-card-price {
  text-align: center;
}

.pro-price-label {
  font-size: 0.72rem;
  color: var(--text-lo);
  margin-bottom: 0.3rem;
}

.pro-price-val {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 800;
  color: #ffb400;
}

.pro-price-unit {
  font-size: 0.8rem;
  color: var(--text-lo);
}

/* ============================================
   下载区域
   ============================================ */
.download-section {
  background: linear-gradient(180deg, var(--bg-deep) 0%, #050e1f 100%);
  position: relative;
  overflow: hidden;
}

.download-bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 50%, rgba(23,94,228,0.12) 0%, transparent 70%);
  pointer-events: none;
}

.download-inner {
  position: relative;
  z-index: 1;
  text-align: center;
}

.download-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  margin-bottom: 1rem;
  line-height: 1.2;
}

.download-desc {
  font-size: 1rem;
  color: var(--text-mid);
  margin-bottom: 3rem;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

.download-buttons {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
  margin-bottom: 3rem;
}

.store-btn {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  background: var(--bg-card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  padding: 0.9rem 1.8rem;
  cursor: pointer;
  transition: border-color 0.3s, transform 0.2s, box-shadow 0.3s;
  text-align: left;
  min-width: 200px;
}

.store-btn:hover {
  border-color: var(--border-hi);
  transform: translateY(-3px);
  box-shadow: var(--glow-cyan);
}

.store-icon {
  font-size: 2rem;
  line-height: 1;
}

.store-text-small {
  font-size: 0.7rem;
  color: var(--text-lo);
  margin-bottom: 2px;
}

.store-text-big {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-hi);
}

/* 二维码区域 */
.qr-section {
  display: flex;
  justify-content: center;
  gap: 3rem;
  flex-wrap: wrap;
}

.qr-item {
  text-align: center;
}

.qr-box {
  width: 120px; height: 120px;
  background: #fff;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 0.8rem;
  padding: 8px;
}

.qr-placeholder {
  width: 100%; height: 100%;
  background: repeating-conic-gradient(#000 0% 25%, #fff 0% 50%) 50% / 12px 12px;
  border-radius: 4px;
  opacity: 0.7;
}

.qr-label {
  font-size: 0.8rem;
  color: var(--text-mid);
}

/* ============================================
   页脚
   ============================================ */
.footer {
  background: #030810;
  border-top: 1px solid var(--border);
  padding: 4rem clamp(1.5rem, 5vw, 4rem) 2rem;
  position: relative;
  z-index: 1;
}

.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand {}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 1rem;
}

.footer-logo-text {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--brand-light), var(--cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.footer-brand-desc {
  font-size: 0.85rem;
  color: var(--text-lo);
  line-height: 1.75;
  margin-bottom: 1.5rem;
  max-width: 280px;
}

.footer-company {
  font-size: 0.78rem;
  color: var(--text-lo);
  line-height: 1.8;
}

.footer-col-title {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-mid);
  margin-bottom: 1.2rem;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}

.footer-links a {
  font-size: 0.85rem;
  color: var(--text-lo);
  transition: color 0.2s;
}

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

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  font-size: 0.83rem;
  color: var(--text-lo);
  margin-bottom: 0.8rem;
}

.footer-contact-icon {
  font-size: 0.9rem;
  margin-top: 1px;
  flex-shrink: 0;
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-copy {
  font-size: 0.78rem;
  color: var(--text-lo);
}

.footer-icp {
  font-size: 0.75rem;
  color: var(--text-lo);
}

.footer-icp a {
  color: var(--text-lo);
  transition: color 0.2s;
}

.footer-icp a:hover { color: var(--cyan); }

/* ============================================
   内页（隐私政策 / 用户协议）
   ============================================ */
.page-hero {
  padding: calc(var(--nav-h) + 4rem) clamp(1.5rem, 5vw, 4rem) 3rem;
  background: var(--bg-base);
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  top: -100px; right: -100px;
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(23,94,228,0.15) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.page-hero-inner {
  max-width: 900px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.page-hero-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  font-weight: 800;
  margin-bottom: 0.8rem;
}

.page-hero-meta {
  font-size: 0.82rem;
  color: var(--text-lo);
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.page-body {
  padding: 3rem clamp(1.5rem, 5vw, 4rem) 5rem;
  position: relative;
  z-index: 1;
}

.page-body-inner {
  max-width: 900px;
  margin: 0 auto;
}

.doc-section {
  margin-bottom: 2.5rem;
}

.doc-h2 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-hi);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.doc-h2::before {
  content: '';
  display: block;
  width: 3px; height: 1.1em;
  background: linear-gradient(180deg, var(--brand), var(--cyan));
  border-radius: 2px;
  flex-shrink: 0;
}

.doc-h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--brand-light);
  margin: 1.2rem 0 0.6rem;
}

.doc-p {
  font-size: 0.9rem;
  color: var(--text-mid);
  line-height: 1.85;
  margin-bottom: 0.8rem;
}

.doc-list {
  padding-left: 0;
  margin-bottom: 0.8rem;
}

.doc-list li {
  font-size: 0.9rem;
  color: var(--text-mid);
  line-height: 1.85;
  padding-left: 1.2rem;
  position: relative;
  margin-bottom: 0.4rem;
}

.doc-list li::before {
  content: '›';
  position: absolute;
  left: 0;
  color: var(--cyan);
  font-weight: 700;
}

.doc-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
  font-size: 0.85rem;
}

.doc-table th {
  background: var(--bg-card);
  color: var(--text-hi);
  padding: 0.7rem 1rem;
  text-align: left;
  border: 1px solid var(--border);
  font-weight: 600;
}

.doc-table td {
  padding: 0.7rem 1rem;
  border: 1px solid var(--border);
  color: var(--text-mid);
}

.doc-table tr:nth-child(even) td {
  background: rgba(13,31,56,0.4);
}

.doc-note {
  background: rgba(23,94,228,0.08);
  border: 1px solid rgba(23,94,228,0.25);
  border-left: 3px solid var(--brand);
  border-radius: var(--radius-sm);
  padding: 1rem 1.2rem;
  font-size: 0.85rem;
  color: var(--text-mid);
  margin: 1rem 0;
  line-height: 1.75;
}

/* 返回顶部 */
.back-top {
  position: fixed;
  bottom: 2rem; right: 2rem;
  width: 44px; height: 44px;
  background: var(--bg-card);
  border: 1px solid var(--border-hi);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.3s, transform 0.3s, background 0.2s;
  z-index: 900;
  font-size: 1rem;
  color: var(--cyan);
}

.back-top.visible {
  opacity: 1;
  transform: translateY(0);
}

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

/* ============================================
   滚动动画
   ============================================ */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ============================================
   响应式
   ============================================ */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 3rem; }
  .hero-visual { order: -1; }
  .phone-mockup { width: 240px; }
  .phone-frame { width: 240px; height: 480px; }
  .sonar-rings { display: none; }
  .float-card-1 { right: -40px; }
  .float-card-2 { left: -40px; }
  .pro-grid { grid-template-columns: 1fr; gap: 3rem; }
  .pro-visual { order: -1; }
  .highlights-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-card.wide { grid-column: span 1; grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 2rem; }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }
  .steps-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .steps-grid::before { display: none; }
  .highlights-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-stats { gap: 1.5rem; }
  .download-buttons { flex-direction: column; align-items: center; }
  .store-btn { width: 100%; max-width: 280px; }
  .footer-top { grid-template-columns: 1fr; gap: 2rem; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .section { padding: 4rem clamp(1rem, 4vw, 2rem); }
}

@media (max-width: 480px) {
  .highlights-grid { grid-template-columns: 1fr 1fr; gap: 1rem; }
  .highlight-card { padding: 1.5rem 1rem; }
  .hero-actions { flex-direction: column; }
  .btn { width: 100%; justify-content: center; }
  .phone-float-card { display: none; }
  .qr-section { gap: 1.5rem; }
}