:root {
  --bg: #0d1420;
  --panel: #121a2a;
  --panel-deep: #080c14;
  --text: #c8d4e0;
  --muted: #8898b8;
  --blue: #4da8f8;
  --blue-soft: #80c8ff;
  --line: #1a2a3a;
  --gold: #ffd54f;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
textarea {
  font: inherit;
}

.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 18px;
  padding: 13px clamp(18px, 4vw, 42px);
  background: rgba(13, 20, 32, .97);
  border-bottom: 2px solid var(--blue);
  box-shadow: 0 6px 28px rgba(0, 0, 0, .65);
  backdrop-filter: blur(18px);
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-img {
  width: 50px;
  height: 50px;
  border: 2px solid var(--blue);
  border-radius: 14px;
  object-fit: cover;
  box-shadow: 0 0 22px rgba(77, 168, 248, .38);
}

.logo-text {
  font-size: 27px;
  font-weight: 800;
  letter-spacing: 2px;
  background: linear-gradient(135deg, var(--blue), var(--blue-soft));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(16px, 3vw, 32px);
}

.nav-links a {
  color: var(--muted);
  font-weight: 600;
  border-bottom: 2px solid transparent;
  padding-bottom: 4px;
}

.nav-links a:hover {
  color: var(--blue-soft);
  border-bottom-color: var(--blue);
}

.hamburger {
  display: none;
  border: 0;
  background: transparent;
  color: var(--muted);
  font-size: 28px;
  cursor: pointer;
}

.container {
  width: min(1340px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0 40px;
}

.hero {
  position: relative;
  overflow: hidden;
  min-height: 270px;
  display: grid;
  place-items: center;
  gap: 14px;
  text-align: center;
  margin-bottom: 42px;
  padding: 48px 18px;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: radial-gradient(ellipse at 30% 40%, #152030 5%, var(--bg) 85%);
  box-shadow: 0 22px 45px rgba(0, 0, 0, .6);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: url("/assets/img/hero-space.jpg") center/cover;
  opacity: .16;
}

.hero::after {
  content: "";
  position: absolute;
  left: -35px;
  bottom: -35px;
  width: 210px;
  height: 210px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(77, 168, 248, .22), transparent 70%);
}

.hero h1,
.hero p,
.search-box {
  position: relative;
  z-index: 1;
}

.hero h1 {
  margin: 0;
  color: var(--blue-soft);
  font-size: clamp(38px, 6vw, 58px);
  letter-spacing: 3px;
  text-shadow: 0 0 35px rgba(77, 168, 248, .4);
}

.hero p {
  max-width: 720px;
  margin: 0;
  color: var(--muted);
  font-size: 19px;
}

.search-box {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 96px;
  width: min(560px, 100%);
  height: 48px;
  overflow: hidden;
  border: 1px solid #2a3a50;
  border-radius: 24px;
  background: rgba(13, 20, 32, .84);
}

.search-box input {
  min-width: 0;
  border: 0;
  outline: 0;
  padding: 0 18px;
  color: var(--text);
  background: transparent;
}

.search-box button,
.submit-btn,
.card-btn {
  cursor: pointer;
}

.search-box button {
  border: 0;
  color: #07111f;
  background: var(--blue-soft);
  font-weight: 800;
}

.section-title {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 46px 0 22px;
  padding-left: 18px;
  border-left: 6px solid var(--blue);
  color: var(--blue-soft);
  font-size: 30px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 28px;
}

.card {
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--panel);
  box-shadow: 0 16px 34px -10px rgba(0, 0, 0, .6);
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}

.card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 4px;
  z-index: 2;
  background: linear-gradient(90deg, var(--blue), var(--blue-soft));
}

.card:hover {
  transform: translateY(-8px);
  border-color: var(--blue);
  box-shadow: 0 24px 46px -12px rgba(77, 168, 248, .35);
}

.card-img {
  width: 100%;
  height: 195px;
  object-fit: cover;
  display: block;
}

.card-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  z-index: 3;
  padding: 4px 11px;
  border-radius: 16px;
  color: var(--gold);
  background: rgba(0, 0, 0, .78);
  font-size: 13px;
  font-weight: 800;
}

.card-body {
  display: flex;
  flex: 1;
  flex-direction: column;
  align-items: flex-start;
  padding: 19px 18px 22px;
}

.card-body h3 {
  margin: 0 0 7px;
  color: #d0ddf0;
  font-size: 21px;
}

.card-body p {
  flex: 1;
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 15px;
}

.card-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1.6px solid var(--blue);
  border-radius: 24px;
  padding: 8px 24px;
  color: var(--blue-soft);
  background: transparent;
  font-weight: 700;
}

.card-btn:hover {
  color: var(--bg);
  background: var(--blue);
}

.comment-section {
  margin-top: 54px;
  padding: 34px 30px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--panel);
  box-shadow: 0 14px 34px rgba(0, 0, 0, .55);
}

.comment-title {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 18px;
  color: var(--blue-soft);
}

.comment-form {
  display: grid;
  gap: 14px;
  margin-bottom: 28px;
}

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

.form-row input,
.form-row textarea {
  flex: 1 1 220px;
  min-width: 0;
  border: 1px solid #2a3a50;
  border-radius: 22px;
  outline: 0;
  padding: 13px 18px;
  color: var(--text);
  background: var(--bg);
}

.form-row textarea {
  min-height: 86px;
  resize: vertical;
}

.submit-btn {
  justify-self: start;
  border: 0;
  border-radius: 26px;
  padding: 12px 28px;
  color: #fff;
  background: #3080d0;
  font-weight: 800;
}

.comments-list {
  display: grid;
  gap: 18px;
}

.comment-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 16px 20px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--bg);
}

.comment-avatar {
  width: 44px;
  height: 44px;
  flex: 0 0 44px;
  border: 2px solid #2a4060;
  border-radius: 50%;
  object-fit: cover;
}

.comment-name {
  margin-bottom: 3px;
  color: var(--blue-soft);
  font-weight: 800;
}

.comment-text {
  color: var(--muted);
  font-size: 15px;
}

.footer {
  display: grid;
  gap: 6px;
  text-align: center;
  padding: 28px 16px;
  border-top: 2px solid var(--blue);
  color: #6878a0;
  background: var(--panel-deep);
}

.footer p {
  margin: 0;
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    width: 100%;
    flex-direction: column;
    gap: 10px;
    align-items: flex-start;
  }

  .nav-links.active {
    display: flex;
  }

  .hamburger {
    display: block;
  }

  .hero {
    border-radius: 18px;
  }

  .search-box {
    grid-template-columns: 1fr;
    height: auto;
    overflow: visible;
    gap: 10px;
    border: 0;
    background: transparent;
  }

  .search-box input,
  .search-box button {
    height: 46px;
    border-radius: 23px;
  }

  .search-box input {
    border: 1px solid #2a3a50;
    background: rgba(13, 20, 32, .84);
  }

  .section-title {
    font-size: 25px;
  }
}