:root {
  color-scheme: light;
  --ink-900: #0f1116;
  --ink-800: #1b1f2a;
  --ink-700: #252b38;
  --ink-600: #313949;
  --ink-500: #445069;
  --sand-100: #f8f6f2;
  --sand-200: #f1ede6;
  --sand-300: #e6dfd3;
  --emerald-500: #17b890;
  --amber-500: #f0a202;
  --rose-500: #e4572e;
  --sky-500: #3c91e6;
  --shadow-soft: 0 20px 60px rgba(15, 17, 22, 0.08);
  --shadow-hard: 0 8px 22px rgba(15, 17, 22, 0.16);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Space Grotesk", "Noto Sans TC", sans-serif;
  background: radial-gradient(circle at top, #fff 0%, #f7f2e9 40%, #f0e9db 100%);
  color: var(--ink-800);
}

img {
  max-width: 100%;
  display: block;
}

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

.container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.86);
  border-bottom: 1px solid rgba(15, 17, 22, 0.08);
  backdrop-filter: blur(10px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0;
  gap: 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: 0.4px;
}

.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: conic-gradient(from 120deg, #0f1116, #f0a202, #17b890, #0f1116);
}

.nav-links {
  display: flex;
  gap: 18px;
  font-size: 14px;
  color: var(--ink-600);
}

.nav-links a {
  padding-bottom: 4px;
  border-bottom: 2px solid transparent;
}

.nav-links a:hover {
  color: var(--ink-800);
  border-color: var(--amber-500);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
}

.btn-primary {
  background: var(--ink-900);
  color: white;
  border-color: var(--ink-900);
}

.btn-ghost {
  background: transparent;
  color: var(--ink-800);
  border-color: rgba(15, 17, 22, 0.2);
}

.hero {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 40px;
  padding: 70px 0 40px;
  align-items: center;
}

.hero h1 {
  font-size: clamp(32px, 4vw, 52px);
  margin: 0 0 18px;
}

.hero p {
  font-size: 17px;
  line-height: 1.7;
  color: var(--ink-600);
}

.hero-panel {
  background: white;
  border-radius: 24px;
  padding: 24px;
  box-shadow: var(--shadow-soft);
  border: 1px solid rgba(15, 17, 22, 0.08);
}

.chip {
  display: inline-flex;
  gap: 6px;
  align-items: center;
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  background: rgba(240, 162, 2, 0.2);
  color: var(--ink-900);
}

.section {
  padding: 50px 0;
}

.section-title {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 24px;
}

.section-title span {
  font-size: 12px;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--ink-500);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.card {
  background: white;
  border-radius: 20px;
  padding: 20px;
  border: 1px solid rgba(15, 17, 22, 0.08);
  box-shadow: var(--shadow-soft);
}

.card h4 {
  margin-top: 0;
  margin-bottom: 10px;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(23, 184, 144, 0.15);
  color: var(--ink-900);
  font-weight: 600;
  font-size: 12px;
}

.footer {
  background: var(--ink-900);
  color: #f9f6f0;
  padding: 50px 0;
  margin-top: 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
}

.footer a {
  color: rgba(255, 255, 255, 0.7);
}

.app-shell {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 24px;
  padding: 24px 0 40px;
}

.sidebar {
  position: sticky;
  top: 88px;
  align-self: start;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.sidebar .card {
  padding: 16px;
}

.sidebar nav {
  display: grid;
  gap: 8px;
}

.sidebar nav a {
  padding: 10px 12px;
  border-radius: 12px;
  color: var(--ink-700);
}

.sidebar nav a.active,
.sidebar nav a:hover {
  background: rgba(15, 17, 22, 0.06);
  color: var(--ink-900);
}

.content {
  display: grid;
  gap: 20px;
}

.subnav {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.subnav a {
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid rgba(15, 17, 22, 0.1);
  font-size: 13px;
  color: var(--ink-600);
}

.subnav a.active {
  background: var(--ink-900);
  color: white;
  border-color: var(--ink-900);
}

.post-card {
  display: grid;
  grid-template-columns: 60px 1fr;
  gap: 16px;
}

.avatar {
  width: 54px;
  height: 54px;
  border-radius: 16px;
  background: linear-gradient(145deg, #1b1f2a, #3c91e6);
  color: white;
  display: grid;
  place-items: center;
  font-weight: 700;
}

.meta {
  display: flex;
  gap: 10px;
  align-items: center;
  color: var(--ink-500);
  font-size: 13px;
}

.meta .pill {
  padding: 4px 8px;
  border-radius: 999px;
  background: rgba(15, 17, 22, 0.08);
  color: var(--ink-700);
  font-weight: 600;
  font-size: 11px;
}

.media-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
  margin-top: 16px;
}

.media-tile {
  border-radius: 16px;
  background: linear-gradient(130deg, #f0a202, #e4572e);
  min-height: 120px;
  position: relative;
  overflow: hidden;
}

.media-tile span {
  position: absolute;
  bottom: 10px;
  left: 10px;
  font-size: 12px;
  color: white;
  font-weight: 600;
}

.notice {
  padding: 14px 16px;
  background: rgba(240, 162, 2, 0.15);
  border-radius: 12px;
  color: var(--ink-800);
  font-size: 13px;
}

.list {
  margin: 0;
  padding-left: 16px;
  color: var(--ink-600);
  line-height: 1.6;
}

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.table th,
.table td {
  padding: 12px 10px;
  border-bottom: 1px solid rgba(15, 17, 22, 0.08);
  text-align: left;
}

.tag {
  display: inline-flex;
  padding: 4px 8px;
  border-radius: 10px;
  background: rgba(23, 184, 144, 0.14);
  font-size: 11px;
  font-weight: 600;
  color: var(--ink-800);
}

.empty {
  text-align: center;
  color: var(--ink-500);
  padding: 40px 0;
}

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.section-rail {
  display: grid;
  gap: 12px;
}

.chat-list {
  display: grid;
  gap: 12px;
}

.chat-item {
  display: flex;
  align-items: center;
  gap: 14px;
}

.chat-body {
  flex: 1;
}

@media (max-width: 900px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
  }
}

@media (max-width: 600px) {
  .nav-links {
    display: none;
  }

  .hero {
    padding-top: 40px;
  }
}