/* ===== Panda plus — Frost UI style (glassmorphism, macOS-inspired) ===== */

:root {
  --green-1: #2e9e6b;
  --green-2: #1f7d54;
  --green-soft: #e7f6ee;
  --ink: #1d2b26;
  --ink-soft: #4a5b54;
  --glass-bg: rgba(255, 255, 255, 0.55);
  --glass-bg-strong: rgba(255, 255, 255, 0.72);
  --glass-border: rgba(255, 255, 255, 0.65);
  --glass-shadow: 0 8px 32px rgba(31, 125, 84, 0.18);
  --radius: 22px;
  --radius-sm: 14px;
  --maxw: 1180px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
  font-family: var(--font);
  color: var(--ink);
  background: #eef7f1;
  background-image:
    radial-gradient(at 12% 18%, #cdeede 0px, transparent 45%),
    radial-gradient(at 88% 12%, #d7f0ff 0px, transparent 42%),
    radial-gradient(at 78% 88%, #fde7f3 0px, transparent 45%),
    radial-gradient(at 22% 92%, #e6f3d8 0px, transparent 45%),
    linear-gradient(135deg, #eef7f1 0%, #e3f3ee 100%);
  background-attachment: fixed;
  min-height: 100vh;
  line-height: 1.6;
}

/* floating decorative blobs */
body::before,
body::after {
  content: "";
  position: fixed;
  border-radius: 50%;
  filter: blur(70px);
  opacity: 0.55;
  z-index: 0;
  pointer-events: none;
}
body::before { width: 420px; height: 420px; background: #9fe3c0; top: -120px; left: -80px; }
body::after  { width: 380px; height: 380px; background: #bfe3ff; bottom: -120px; right: -60px; }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 20px; position: relative; z-index: 1; }

/* ===== Splash screen (fullscreen video) ===== */
.splash {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: #000;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.8s ease, visibility 0.8s ease;
}
.splash.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}
.splash-video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.splash-scroll-hint {
  position: absolute;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  color: #fff;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 1px;
  text-shadow: 0 2px 12px rgba(0,0,0,0.6);
  animation: bounceHint 2s infinite;
  pointer-events: none;
  white-space: nowrap;
}
@keyframes bounceHint {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* Logo image (replaces emoji+text) */
.brand-logo-img {
  height: 32px;
  width: auto;
  object-fit: contain;
}

/* ===== Glass primitive ===== */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  box-shadow: var(--glass-shadow);
}

/* ===== Navbar ===== */
.navbar {
  position: sticky;
  top: 14px;
  z-index: 50;
  margin: 14px auto 0;
  max-width: var(--maxw);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 22px;
  border-radius: 18px;
}
.brand-logo { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1.25rem; color: var(--green-2); }
.brand-logo .panda { font-size: 1.6rem; }
.nav-links { display: flex; gap: 6px; flex-wrap: wrap; }
.nav-links a {
  text-decoration: none;
  color: var(--ink-soft);
  font-weight: 600;
  padding: 8px 14px;
  border-radius: 12px;
  transition: all 0.2s ease;
  font-size: 0.95rem;
}
.nav-links a:hover { background: rgba(46, 158, 107, 0.12); color: var(--green-2); }
.nav-links a.active { background: var(--green-1); color: #fff; box-shadow: 0 4px 14px rgba(46,158,107,0.35); }

/* Language toggle */
.lang-toggle {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  margin-left: 10px;
  padding: 3px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(46, 158, 107, 0.18);
  backdrop-filter: blur(8px);
}
.lang-btn {
  border: none;
  background: transparent;
  cursor: pointer;
  font-family: inherit;
  font-weight: 700;
  font-size: 0.82rem;
  color: var(--ink-soft);
  padding: 5px 11px;
  border-radius: 9px;
  transition: all 0.2s ease;
}
.lang-btn:hover { color: var(--green-2); }
.lang-btn.active {
  background: var(--green-1);
  color: #fff;
  box-shadow: 0 3px 10px rgba(46, 158, 107, 0.3);
}
@media (max-width: 600px) {
  .lang-toggle { margin: 6px 0 0; }
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  border: none; cursor: pointer; font-family: var(--font); font-weight: 700;
  padding: 12px 22px; border-radius: 14px; font-size: 1rem; text-decoration: none;
  transition: transform 0.15s ease, box-shadow 0.2s ease, background 0.2s ease;
}
.btn-primary { background: linear-gradient(135deg, var(--green-1), var(--green-2)); color: #fff; box-shadow: 0 8px 22px rgba(31,125,84,0.32); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 28px rgba(31,125,84,0.42); }
.btn-ghost { background: rgba(255,255,255,0.6); color: var(--green-2); border: 1px solid var(--glass-border); }
.btn-ghost:hover { background: rgba(255,255,255,0.85); }

/* ===== Hero ===== */
.hero { text-align: center; padding: 70px 20px 30px; }
.hero .eyebrow {
  display: inline-block; font-weight: 700; letter-spacing: 1px; font-size: 0.8rem;
  color: var(--green-2); background: var(--green-soft); padding: 6px 14px; border-radius: 999px; margin-bottom: 18px;
}
.hero h1 { font-size: clamp(2.2rem, 5vw, 3.4rem); margin: 0 0 10px; font-weight: 900; letter-spacing: -0.5px; }
.hero h1 .grad { background: linear-gradient(120deg, var(--green-1), #2b9fd6); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.hero .slogan { font-size: clamp(1.05rem, 2.4vw, 1.4rem); color: var(--ink-soft); font-weight: 600; margin-bottom: 8px; }
.hero p.lead { max-width: 640px; margin: 14px auto 26px; color: var(--ink-soft); }

/* ===== Section ===== */
.section { padding: 34px 0; }
.section-head { text-align: center; margin-bottom: 26px; }
.section-head h2 { font-size: 1.9rem; margin: 0 0 6px; font-weight: 800; }
.section-head p { color: var(--ink-soft); margin: 0; }

/* ===== Functional zones (Trip.com style) ===== */
.zones { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 18px; }
.zone-card { padding: 26px 22px; text-align: left; cursor: pointer; transition: transform 0.2s ease, box-shadow 0.2s ease; text-decoration: none; color: inherit; display: block; }
.zone-card:hover { transform: translateY(-6px); box-shadow: 0 16px 40px rgba(31,125,84,0.25); }
.zone-card .z-icon { font-size: 2.2rem; }
.zone-card h3 { margin: 12px 0 4px; font-size: 1.25rem; }
.zone-card .z-en { color: var(--green-2); font-weight: 700; font-size: 0.85rem; letter-spacing: 0.5px; }
.zone-card p { color: var(--ink-soft); font-size: 0.92rem; margin: 8px 0 0; }

/* ===== Route cards ===== */
.route-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 20px; }
.route-card { padding: 22px; transition: transform 0.2s ease, box-shadow 0.2s ease; }
.route-card:hover { transform: translateY(-6px); box-shadow: 0 18px 44px rgba(31,125,84,0.26); }
.route-card .r-top { display: flex; align-items: center; gap: 12px; margin-bottom: 6px; }
.route-card .r-emoji { font-size: 2rem; }
.route-card .r-cat { font-size: 0.72rem; font-weight: 700; padding: 3px 10px; border-radius: 999px; background: var(--green-soft); color: var(--green-2); }
.route-card h3 { margin: 4px 0 2px; font-size: 1.3rem; }
.route-card .r-en { color: var(--ink-soft); font-size: 0.85rem; font-weight: 600; }
.route-card .r-theme { color: var(--green-2); font-size: 0.9rem; margin: 8px 0; font-style: italic; }
.route-card p.r-sum { color: var(--ink-soft); font-size: 0.92rem; margin: 0 0 14px; }
.spot-list { list-style: none; padding: 0; margin: 0 0 16px; }
.spot-list li { padding: 8px 0; border-top: 1px solid rgba(31,125,84,0.12); }
.spot-list li .s-name { font-weight: 700; }
.spot-list li .s-desc { color: var(--ink-soft); font-size: 0.86rem; display: block; margin-top: 2px; }

/* ===== Filter chips ===== */
.chips { display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; margin-bottom: 24px; }
.chip { padding: 9px 18px; border-radius: 999px; border: 1px solid var(--glass-border); background: rgba(255,255,255,0.55); cursor: pointer; font-weight: 700; color: var(--ink-soft); transition: all 0.18s ease; }
.chip:hover { background: rgba(255,255,255,0.85); }
.chip.active { background: var(--green-1); color: #fff; border-color: transparent; }

/* ===== Forum ===== */
.forum-layout { display: grid; grid-template-columns: 1fr; gap: 24px; }
@media (min-width: 880px) { .forum-layout { grid-template-columns: 360px 1fr; align-items: start; } }
.post-form { padding: 24px; position: sticky; top: 90px; }
.post-form h3 { margin: 0 0 14px; }
.field { margin-bottom: 14px; }
.field label { display: block; font-weight: 700; font-size: 0.85rem; margin-bottom: 6px; color: var(--ink-soft); }
.field input, .field textarea, .field select {
  width: 100%; padding: 11px 14px; border-radius: 12px; border: 1px solid rgba(31,125,84,0.2);
  background: rgba(255,255,255,0.8); font-family: var(--font); font-size: 0.95rem; color: var(--ink);
}
.field input:focus, .field textarea:focus, .field select:focus { outline: none; border-color: var(--green-1); box-shadow: 0 0 0 3px rgba(46,158,107,0.18); }
.field textarea { min-height: 90px; resize: vertical; }

.post-list { display: flex; flex-direction: column; gap: 16px; }
.post-card { padding: 20px; }
.post-card .p-head { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; }
.post-card .p-flag { font-size: 1.3rem; }
.post-card .p-author { font-weight: 800; }
.post-card .p-time { color: var(--ink-soft); font-size: 0.8rem; margin-left: auto; }
.post-card h4 { margin: 0 0 6px; font-size: 1.15rem; }
.post-card .p-body { color: var(--ink-soft); margin: 0; }
.post-card .p-route { display: inline-block; margin-top: 10px; font-size: 0.75rem; font-weight: 700; color: var(--green-2); background: var(--green-soft); padding: 4px 10px; border-radius: 999px; }
.empty-note { padding: 30px; text-align: center; color: var(--ink-soft); }
.toast { position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%) translateY(20px); background: var(--green-2); color: #fff; padding: 12px 22px; border-radius: 12px; box-shadow: 0 10px 30px rgba(0,0,0,0.2); opacity: 0; transition: all 0.3s ease; z-index: 200; font-weight: 700; }
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ===== Brand matrix ===== */
.matrix-group { margin-bottom: 26px; }
.matrix-group h3 { font-size: 1.15rem; margin: 0 0 12px; color: var(--green-2); }
.matrix-row { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 14px; }
.matrix-item { padding: 16px 18px; }
.matrix-item .m-en { font-weight: 800; font-size: 1.05rem; }
.matrix-item .m-cn { color: var(--ink-soft); font-size: 0.9rem; }

/* ===== Footer ===== */
.footer { text-align: center; padding: 40px 20px 60px; color: var(--ink-soft); font-size: 0.9rem; position: relative; z-index: 1; }
.footer .panda { font-size: 1.6rem; }

.loading { text-align: center; color: var(--ink-soft); padding: 30px; }
.muted { color: var(--ink-soft); }
.center { text-align: center; }

/* ===== Utility ===== */
.hidden { display: none !important; }

/* ===== Auth area in navbar ===== */
.auth-area { display: inline-flex; align-items: center; gap: 6px; margin-left: 4px; }
.auth-link { background: none; border: none; font: inherit; font-size: 0.9rem; font-weight: 700; color: var(--ink-soft); cursor: pointer; padding: 6px 10px; border-radius: 8px; transition: all .2s; }
.auth-link:hover { background: rgba(46,158,107,.1); color: var(--green-2); }
.auth-link-primary { background: linear-gradient(135deg,var(--green-1),var(--green-2)); color: #fff; }
.auth-link-primary:hover { color: #fff; transform: translateY(-1px); }
.auth-user { font-size: 0.9rem; font-weight: 700; color: var(--green-2); }

/* ===== Auth modal ===== */
.auth-modal { position: fixed; inset: 0; background: rgba(20,30,20,.45); display: flex; align-items: center; justify-content: center; z-index: 1000; padding: 16px; }
.auth-card { width: 100%; max-width: 380px; padding: 30px 26px 26px; position: relative; }
.auth-close { position: absolute; top: 10px; right: 14px; background: none; border: none; font-size: 26px; line-height: 1; color: var(--ink-soft); cursor: pointer; }
.auth-tabs { display: flex; gap: 8px; margin-bottom: 18px; }
.auth-tab { flex: 1; padding: 10px; border: none; border-radius: 10px; background: rgba(255,255,255,.6); font-weight: 700; font-size: 0.9rem; color: var(--ink-soft); cursor: pointer; transition: all .2s; }
.auth-tab.active { background: linear-gradient(135deg,var(--green-1),var(--green-2)); color: #fff; }
.auth-form .field { margin-bottom: 14px; }
.auth-error { color: #c0392b; font-size: 0.82rem; min-height: 18px; margin-bottom: 8px; text-align: center; }

/* ===== Forum login gate ===== */
.post-gate { padding: 30px 24px; text-align: center; }
.post-gate p { color: var(--ink-soft); margin: 10px 0 16px; font-size: 0.95rem; }

/* =====================================================================
   MOBILE ADAPTATION
   - hamburger nav on narrow screens
   - tighten spacing / type on phones
   - prevent horizontal scroll from decorative blobs (without breaking sticky)
   ===================================================================== */
html, body { overflow-x: clip; }

/* Hamburger toggle — hidden on desktop, shown <=768px */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px; height: 44px;
  padding: 0;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(46, 158, 107, 0.18);
  border-radius: 12px;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}
.nav-toggle span {
  display: block; width: 22px; height: 2px; margin: 0 auto;
  background: var(--green-2); border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.2s ease;
}
.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .navbar { margin: 10px 12px 0; top: 10px; padding: 10px 14px; }
  .nav-links {
    position: absolute;
    top: calc(100% + 10px);
    left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 12px;
    background: var(--glass-bg-strong);
    backdrop-filter: blur(18px) saturate(160%);
    -webkit-backdrop-filter: blur(18px) saturate(160%);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    box-shadow: var(--glass-shadow);
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links > a {
    padding: 13px 14px;
    font-size: 1rem;
    text-align: left;
  }
  .nav-links > a.active { background: var(--green-1); color: #fff; }
  .lang-toggle { margin: 8px 0 0; justify-content: center; }
  .auth-area { margin: 8px 0 0; justify-content: center; flex-wrap: wrap; }

  /* Splash on narrow screens — still fullscreen but hint text smaller */
  .splash-scroll-hint { font-size: 0.82rem; bottom: 24px; }
}

@media (max-width: 600px) {
  .container { padding: 0 16px; }
  .hero { padding: 46px 16px 22px; }
  .hero .lead { margin: 12px auto 22px; }
  .section { padding: 26px 0; }
  .section-head { margin-bottom: 20px; }
  .section-head h2 { font-size: 1.5rem; }
  .footer { padding: 32px 16px 48px; }
  .route-grid { grid-template-columns: 1fr; }
  .zones { grid-template-columns: 1fr; }
  .post-form { position: static; }
  /* brand "about" box uses inline padding — relax it on phones */
  main > .section > .glass[style] { padding: 20px 18px !important; }
}

@media (max-width: 480px) {
  .hero .center { flex-direction: column; }
  .hero .btn { width: 100%; justify-content: center; }
  .chips { gap: 8px; }
  .chip { padding: 8px 14px; font-size: 0.85rem; }
}