/* roulang page: index */
/* ===== 设计变量 ===== */
:root {
  --bg-deep: #0B1E33;
  --bg-section: #0F2A45;
  --bg-card: rgba(255, 255, 255, 0.06);
  --bg-card-hover: rgba(255, 255, 255, 0.10);
  --border-glass: rgba(255, 255, 255, 0.12);
  --primary: #2E9BFF;
  --primary-dark: #1E6FD9;
  --primary-glow: rgba(46, 155, 255, 0.35);
  --amber: #D4A056;
  --amber-light: #E8B66A;
  --success: #34D399;
  --warning: #F59E0B;
  --danger: #EF4444;
  --text-main: #E6EDF5;
  --text-sub: #94A9C0;
  --text-dim: #5A7188;
  --radius-card: 18px;
  --radius-lg: 24px;
  --radius-pill: 999px;
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35), 0 0 20px rgba(46, 155, 255, 0.08);
  --shadow-glow: 0 0 24px rgba(46, 155, 255, 0.25);
  --font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --transition: 0.25s ease;
  --container-w: 1200px;
}

/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-family);
  background: var(--bg-deep);
  color: var(--text-main);
  line-height: 1.7;
  font-size: 1rem;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--amber-light); }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; }
input, textarea, select { font-family: inherit; }

/* ===== 容器 ===== */
.container {
  max-width: var(--container-w);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}
.section {
  padding: clamp(4rem, 8vw, 7rem) 0;
  position: relative;
}

/* ===== 背景纹理 ===== */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: radial-gradient(circle at 1px 1px, rgba(255,255,255,0.03) 1px, transparent 0);
  background-size: 34px 34px;
  pointer-events: none;
  z-index: 0;
}

/* ===== 区块头部 ===== */
.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto clamp(2.5rem, 5vw, 4rem);
}
.section-tag {
  display: inline-block;
  background: rgba(46, 155, 255, 0.12);
  color: var(--primary);
  border: 1px solid rgba(46, 155, 255, 0.2);
  border-radius: var(--radius-pill);
  padding: 5px 18px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  margin-bottom: 14px;
}
.section-header h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-main);
  margin-bottom: 14px;
}
.section-header p {
  color: var(--text-sub);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ===== 导航 ===== */
.floating-nav {
  position: fixed;
  top: 14px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  width: min(1220px, calc(100% - 32px));
  background: rgba(11, 30, 51, 0.75);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-radius: var(--radius-pill);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35), 0 0 20px rgba(46, 155, 255, 0.05);
  padding: 8px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--text-main);
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 10px;
}
.nav-logo i {
  color: var(--primary);
  font-size: 1.1rem;
}
.nav-logo:hover { color: var(--primary); }
.nav-links {
  display: flex;
  align-items: center;
  gap: 2px;
}
.nav-links a {
  color: var(--text-sub);
  font-size: 0.86rem;
  font-weight: 500;
  padding: 7px 16px;
  border-radius: var(--radius-pill);
  transition: background var(--transition), color var(--transition), box-shadow var(--transition);
}
.nav-links a:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-main);
}
.nav-links a.active {
  background: rgba(46, 155, 255, 0.18);
  color: var(--primary);
  box-shadow: 0 0 12px rgba(46, 155, 255, 0.1);
}
.nav-cta {
  display: flex;
  align-items: center;
  gap: 10px;
}
.btn-login {
  display: inline-block;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  font-size: 0.82rem;
  font-weight: 600;
  padding: 8px 22px;
  border-radius: var(--radius-pill);
  box-shadow: 0 4px 18px rgba(46, 155, 255, 0.35);
  transition: transform var(--transition), box-shadow var(--transition), filter var(--transition);
}
.btn-login:hover {
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 6px 24px rgba(46, 155, 255, 0.5);
  filter: brightness(1.08);
}
.btn-login:active { transform: scale(0.96); }
.nav-toggle {
  display: none;
  background: none;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 12px;
  width: 42px;
  height: 42px;
  color: var(--text-main);
  font-size: 1.1rem;
  align-items: center;
  justify-content: center;
  transition: background var(--transition);
}
.nav-toggle:hover { background: rgba(255, 255, 255, 0.08); }

/* ===== Hero ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding: 130px 0 80px;
  overflow: hidden;
  background:
    radial-gradient(ellipse at 20% 20%, rgba(46, 155, 255, 0.18) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 80%, rgba(212, 160, 86, 0.1) 0%, transparent 40%),
    linear-gradient(135deg, #0B1E33 0%, #0F2A45 50%, #0D243E 100%);
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.jpg');
  background-size: cover;
  background-position: center;
  opacity: 0.13;
  mix-blend-mode: luminosity;
}
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(11, 30, 51, 0.4) 0%, rgba(11, 30, 51, 0.75) 100%);
}
.hero .container {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(46, 155, 255, 0.14);
  border: 1px solid rgba(46, 155, 255, 0.25);
  color: var(--primary);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 6px 18px;
  border-radius: var(--radius-pill);
  margin-bottom: 20px;
}
.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.2rem);
  font-weight: 700;
  line-height: 1.22;
  color: var(--text-main);
  margin-bottom: 18px;
  letter-spacing: 0.5px;
}
.hero h1 span { color: var(--primary); }
.hero-subtitle {
  font-size: 1.02rem;
  color: var(--text-sub);
  line-height: 1.8;
  margin-bottom: 30px;
  max-width: 520px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 36px;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 30px;
  border-radius: var(--radius-pill);
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  transition: transform var(--transition), box-shadow var(--transition), filter var(--transition), background var(--transition);
}
.btn:focus-visible { outline: 2px solid var(--amber); outline-offset: 3px; }
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  box-shadow: 0 4px 20px rgba(46, 155, 255, 0.4);
}
.btn-primary:hover {
  color: #fff;
  filter: brightness(1.1);
  box-shadow: 0 8px 30px rgba(46, 155, 255, 0.55);
  transform: translateY(-2px);
}
.btn-primary:active { transform: scale(0.97); }
.btn-ghost {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.35);
  color: var(--text-main);
}
.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.6);
}
.btn-ghost:active { transform: scale(0.97); }

/* Hero 视觉区 */
.hero-visual {
  position: relative;
}
.hero-visual-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: var(--shadow-card);
  background: rgba(255, 255, 255, 0.04);
  position: relative;
}
.hero-visual-card img {
  width: 100%;
  height: 300px;
  object-fit: cover;
}
.float-card {
  position: absolute;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  border-radius: 14px;
  padding: 12px 18px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
  color: #0B1E33;
}
.float-card span {
  display: block;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: 2px;
}
.float-card p {
  font-size: 0.8rem;
  color: #334155;
  line-height: 1.4;
}
.float-card--hot {
  top: 18px;
  right: -14px;
}
.float-card--new {
  bottom: 18px;
  left: -14px;
}

/* ===== 数据条 ===== */
.stats {
  position: relative;
  z-index: 3;
  margin-top: -35px;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
.stat-item {
  background: rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-card);
  padding: 24px 20px;
  text-align: center;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}
.stat-item:hover {
  transform: translateY(-4px);
  background: rgba(255, 255, 255, 0.09);
  box-shadow: var(--shadow-card);
}
.stat-num {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  color: var(--primary);
  line-height: 1.2;
  margin-bottom: 4px;
}
.stat-label {
  font-size: 0.82rem;
  color: var(--text-sub);
}

/* ===== 板块卡片 ===== */
.boards {
  background: var(--bg-section);
  position: relative;
  overflow: hidden;
}
.boards::before {
  content: '';
  position: absolute;
  top: -80px;
  right: -80px;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(46, 155, 255, 0.08) 0%, transparent 70%);
}
.board-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.board-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-card);
  padding: 28px 24px;
  position: relative;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition), background var(--transition);
}
.board-card:hover {
  transform: translateY(-4px);
  border-color: rgba(46, 155, 255, 0.35);
  box-shadow: var(--shadow-card), 0 0 18px rgba(46, 155, 255, 0.08);
  background: var(--bg-card-hover);
}
.board-icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: rgba(46, 155, 255, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  color: var(--primary);
  margin-bottom: 18px;
  transition: transform 0.15s ease;
}
.board-card:hover .board-icon { transform: scale(1.05); }
.board-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-main);
}
.board-card p {
  font-size: 0.86rem;
  color: var(--text-sub);
  line-height: 1.6;
  margin-bottom: 16px;
}
.board-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 3px 12px;
  border-radius: var(--radius-pill);
}
.badge-hot {
  background: rgba(212, 160, 86, 0.2);
  color: var(--amber-light);
  border: 1px solid rgba(212, 160, 86, 0.3);
}
.badge-new {
  background: rgba(52, 211, 153, 0.15);
  color: var(--success);
  border: 1px solid rgba(52, 211, 153, 0.3);
}
.board-link {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--primary);
  transition: color var(--transition);
}
.board-link:hover { color: var(--amber-light); }

/* ===== 场景区 ===== */
.scenarios {
  background: var(--bg-deep);
}
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.scenario-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.scenario-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
  border-color: rgba(46, 155, 255, 0.3);
}
.scenario-card img {
  width: 100%;
  height: 190px;
  object-fit: cover;
}
.scenario-body {
  padding: 22px 22px 24px;
}
.scenario-body h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 8px;
}
.scenario-body p {
  font-size: 0.86rem;
  color: var(--text-sub);
  line-height: 1.65;
  margin-bottom: 14px;
}
.scenario-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.tag {
  display: inline-block;
  font-size: 0.72rem;
  color: var(--text-sub);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.08);
  padding: 3px 10px;
  border-radius: var(--radius-pill);
}

/* ===== 用户故事 ===== */
.stories {
  background: var(--bg-section);
  position: relative;
}
.stories::before {
  content: '';
  position: absolute;
  bottom: -60px;
  left: -60px;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(212, 160, 86, 0.08) 0%, transparent 70%);
}
.story-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.story-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-card);
  padding: 26px 24px;
  transition: transform var(--transition), box-shadow var(--transition);
}
.story-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}
.story-user {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}
.story-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
  background: linear-gradient(135deg, rgba(46, 155, 255, 0.3), rgba(46, 155, 255, 0.1));
  border: 1px solid rgba(46, 155, 255, 0.3);
}
.story-user .name {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-main);
}
.story-user .loc {
  font-size: 0.75rem;
  color: var(--text-dim);
}
.story-card p {
  font-size: 0.88rem;
  color: var(--text-sub);
  line-height: 1.7;
  margin-bottom: 16px;
  font-style: italic;
}
.story-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.story-badge {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 3px 12px;
  border-radius: var(--radius-pill);
}
.story-badge--hot {
  background: rgba(212, 160, 86, 0.15);
  color: var(--amber-light);
}
.story-badge--elite {
  background: rgba(46, 155, 255, 0.15);
  color: var(--primary);
}
.story-time {
  font-size: 0.75rem;
  color: var(--text-dim);
}

/* ===== 价格卡 ===== */
.pricing {
  background: var(--bg-deep);
}
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
  max-width: 1000px;
  margin: 0 auto;
}
.price-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 34px 28px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.price-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}
.price-card--featured {
  border: 1.5px solid var(--primary);
  background: linear-gradient(180deg, rgba(46, 155, 255, 0.1) 0%, rgba(255, 255, 255, 0.06) 100%);
  box-shadow: 0 0 30px rgba(46, 155, 255, 0.12);
}
.price-reco {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--amber), var(--amber-light));
  color: #0B1E33;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 4px 18px;
  border-radius: var(--radius-pill);
  box-shadow: 0 4px 12px rgba(212, 160, 86, 0.3);
  white-space: nowrap;
}
.price-name {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 10px;
}
.price-num {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 4px;
}
.price-num .cur {
  font-size: 1.1rem;
  vertical-align: baseline;
  color: var(--text-sub);
}
.price-num .per {
  font-size: 0.85rem;
  color: var(--text-dim);
  font-weight: 400;
}
.price-features {
  flex: 1;
  margin: 20px 0 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.price-features li {
  font-size: 0.86rem;
  color: var(--text-sub);
  display: flex;
  align-items: center;
  gap: 10px;
}
.price-features li i {
  color: var(--success);
  font-size: 0.8rem;
  width: 18px;
  text-align: center;
}
.price-features li.off { color: var(--text-dim); }
.price-features li.off i { color: var(--text-dim); }
.btn-block {
  width: 100%;
  justify-content: center;
}
.price-note {
  text-align: center;
  font-size: 0.78rem;
  color: var(--text-dim);
  margin-top: 20px;
}

/* ===== FAQ ===== */
.faq {
  background: var(--bg-section);
}
.faq-list {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: 16px;
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.faq-item:hover { border-color: rgba(46, 155, 255, 0.25); }
.faq-item.active { border-color: rgba(46, 155, 255, 0.4); box-shadow: 0 0 18px rgba(46, 155, 255, 0.06); }
.faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-main);
  user-select: none;
  transition: background var(--transition);
}
.faq-q:hover { background: rgba(255, 255, 255, 0.03); }
.faq-q .faq-icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(46, 155, 255, 0.12);
  color: var(--primary);
  font-size: 0.75rem;
  transition: transform var(--transition), background var(--transition);
}
.faq-item.active .faq-icon {
  transform: rotate(45deg);
  background: rgba(46, 155, 255, 0.25);
}
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.25s ease, padding 0.25s ease;
  padding: 0 24px;
}
.faq-item.active .faq-a {
  max-height: 300px;
  padding: 0 24px 20px;
}
.faq-a p {
  font-size: 0.88rem;
  color: var(--text-sub);
  line-height: 1.7;
}

/* ===== CTA ===== */
.cta {
  background: var(--bg-deep);
}
.cta-card {
  background: linear-gradient(135deg, rgba(46, 155, 255, 0.12) 0%, rgba(11, 30, 51, 0.8) 50%, rgba(212, 160, 86, 0.08) 100%),
    url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  padding: clamp(3rem, 6vw, 5rem) clamp(1.8rem, 4vw, 4rem);
  text-align: center;
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}
.cta-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(11, 30, 51, 0.7);
}
.cta-card > * {
  position: relative;
  z-index: 1;
}
.cta-card h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 14px;
}
.cta-card p {
  color: var(--text-sub);
  font-size: 0.95rem;
  max-width: 560px;
  margin: 0 auto 30px;
}
.cta-card .btn-ghost {
  border-color: rgba(255, 255, 255, 0.45);
}

/* ===== 页脚 ===== */
.footer {
  background: #081726;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 60px 0 30px;
  position: relative;
}
.footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(46, 155, 255, 0.3), transparent);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand h3 {
  font-size: 1.1rem;
  color: var(--text-main);
  margin-bottom: 14px;
}
.footer-brand p {
  font-size: 0.84rem;
  color: var(--text-sub);
  line-height: 1.7;
}
.footer-col h4 {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 16px;
}
.footer-col a {
  display: block;
  font-size: 0.82rem;
  color: var(--text-sub);
  margin-bottom: 8px;
  transition: color var(--transition);
}
.footer-col a:hover { color: var(--primary); }
.footer-contact p {
  font-size: 0.82rem;
  color: var(--text-sub);
  margin-bottom: 8px;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  padding-top: 20px;
  text-align: center;
  font-size: 0.78rem;
  color: var(--text-dim);
}
.footer-bottom a { color: var(--text-dim); }
.footer-bottom a:hover { color: var(--primary); }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .hero .container {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .hero-visual { max-width: 560px; }
  .board-grid { grid-template-columns: repeat(2, 1fr); }
  .scenario-grid { grid-template-columns: repeat(2, 1fr); }
  .story-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .pricing-grid { grid-template-columns: 1fr; max-width: 520px; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .floating-nav {
    width: calc(100% - 24px);
    top: 10px;
  }
  .nav-links {
    display: none;
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    right: 0;
    background: rgba(11, 30, 51, 0.95);
    backdrop-filter: blur(20px);
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    padding: 14px;
    flex-direction: column;
    align-items: stretch;
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.5);
  }
  .nav-links.open { display: flex; }
  .nav-links a {
    padding: 12px 16px;
    border-radius: 12px;
    text-align: center;
  }
  .nav-toggle { display: flex; }
  .nav-cta .btn-login { display: none; }
  .nav-cta { margin-left: auto; margin-right: 8px; }
  .board-grid { grid-template-columns: 1fr; }
  .scenario-grid { grid-template-columns: 1fr; }
  .story-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .section { padding: 3.5rem 0; }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
  .hero { padding: 100px 0 60px; }
  .hero-visual-card img { height: 220px; }
  .float-card { padding: 8px 14px; }
  .float-card p { font-size: 0.75rem; }
}

@media (max-width: 576px) {
  .hero h1 { font-size: 1.7rem; }
  .hero-subtitle { font-size: 0.92rem; }
  .btn { padding: 12px 22px; font-size: 0.88rem; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-item { padding: 18px 12px; }
  .stat-num { font-size: 1.4rem; }
  .section-header h2 { font-size: 1.45rem; }
  .board-card { padding: 22px 18px; }
  .pricing-grid { padding: 0 10px; }
  .footer-grid { gap: 24px; }
  .faq-q { padding: 15px 18px; font-size: 0.88rem; }
  .faq-a { padding: 0 18px; }
  .faq-item.active .faq-a { padding: 0 18px 16px; }
}