/* ===== SHARED STYLES — 小室一裝 ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'Inter', 'Noto Serif TC', sans-serif;
  background: #FFFFFF;
  color: #1A1714;
  line-height: 1.6;
  overflow-x: hidden;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
button { cursor: pointer; border: none; outline: none; background: none; font-family: inherit; }
ul { list-style: none; }

:root {
  --white: #FFFFFF;
  --cream: #F8F6F3;
  --cream-dark: #F0EDE8;
  --text-dark: #1A1714;
  --text-mid: #4A4340;
  --text-light: #9B9088;
  --brown: #8B6F52;
  --ochre: #C17F4B;
  --ochre-light: #E8C9A8;
  --border: #E8E4DF;
  --shadow-sm: 0 2px 8px rgba(26,23,20,0.06);
  --shadow-md: 0 8px 24px rgba(26,23,20,0.10);
  --shadow-lg: 0 20px 60px rgba(26,23,20,0.15);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --transition: 0.3s ease;
  --navbar-h: 68px;
}

::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: var(--cream); }
::-webkit-scrollbar-thumb { background: var(--ochre-light); border-radius: 99px; }

/* NAVBAR */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 2000;
  /* ★ 移除 isolation:isolate — 它會建立新的 stacking context，導致 absolute/fixed dropdown 被裁切 */
  height: var(--navbar-h);
  background: rgba(255,255,255,0.98);
  display: flex; align-items: center;
  padding: 0 40px; gap: 40px;
  transition: var(--transition);
  border-bottom: 1px solid var(--border);
}
.navbar.scrolled {
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 20px rgba(26,23,20,0.08);
}
.nav-logo { flex-shrink: 0; display: flex; align-items: center; }
.nav-logo .logo-img { height: 28px; width: auto; max-width: 140px; display: block; object-fit: contain; }
/* 保留文字 logo 的後備樣式（當圖片載入失敗時） */
.nav-logo .logo-cn { font-family: 'Noto Serif TC', serif; font-size: 1.3rem; font-weight: 700; color: var(--text-dark); letter-spacing: 0.05em; line-height: 1; }
.nav-logo .logo-en { font-size: 0.6rem; font-weight: 400; color: var(--text-light); letter-spacing: 0.22em; text-transform: uppercase; }
.nav-links { display: flex; align-items: center; gap: 6px; flex: 1; justify-content: center; }
.nav-links a { font-size: 0.88rem; font-weight: 500; color: var(--text-mid); padding: 6px 14px; border-radius: 99px; transition: var(--transition); white-space: nowrap; letter-spacing: 0.02em; }
.nav-links a:hover { background: var(--cream); color: var(--text-dark); }
.nav-links a.active { color: var(--ochre); background: rgba(193,127,75,0.08); }
.nav-links a.nav-cta { background: var(--brown); color: white; font-weight: 600; }
.nav-links a.nav-cta:hover { background: var(--ochre); }
.nav-actions { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.nav-search-btn { width: 38px; height: 38px; border-radius: 50%; display: flex; align-items: center; justify-content: center; color: var(--text-mid); transition: var(--transition); font-size: 1rem; }
.nav-search-btn:hover { background: var(--cream); color: var(--text-dark); }
.nav-login-btn { border: 1.5px solid var(--border); border-radius: 99px; padding: 7px 20px; font-size: 0.85rem; font-weight: 500; color: var(--text-dark); transition: var(--transition); letter-spacing: 0.02em; }
.nav-login-btn:hover { border-color: var(--brown); color: var(--brown); background: rgba(139,111,82,0.04); }

/* PAGE HERO BANNER */
.page-hero {
  margin-top: var(--navbar-h);
  background: var(--cream);
  padding: 64px 40px 48px;
  border-bottom: 1px solid var(--border);
}
.page-hero-inner { max-width: 1280px; margin: 0 auto; }
.page-hero-label { font-size: 0.75rem; font-weight: 600; letter-spacing: 0.18em; text-transform: uppercase; color: var(--ochre); margin-bottom: 12px; display: flex; align-items: center; gap: 8px; }
.page-hero-label::before { content: ''; display: block; width: 20px; height: 1.5px; background: var(--ochre); }
.page-hero h1 { font-family: 'Noto Serif TC', serif; font-size: 2.4rem; font-weight: 700; color: var(--text-dark); line-height: 1.2; margin-bottom: 12px; }
.page-hero p { font-size: 1rem; color: var(--text-light); max-width: 560px; }

/* CONTAINER */
.container { max-width: 1280px; margin: 0 auto; padding: 0 40px; }

/* SECTION */
.section { padding: 64px 40px; }
.section-alt { background: var(--cream); }
.section-header { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 32px; }
.section-title { font-family: 'Noto Serif TC', serif; font-size: 1.5rem; font-weight: 700; color: var(--text-dark); display: flex; align-items: center; gap: 12px; }
.section-title::before { content: ''; display: block; width: 4px; height: 22px; background: var(--ochre); border-radius: 2px; }
.section-more { font-size: 0.85rem; font-weight: 500; color: var(--brown); display: flex; align-items: center; gap: 4px; transition: var(--transition); }
.section-more:hover { color: var(--ochre); gap: 8px; }

/* FILTER ROW */
.filter-row {
  display: flex; align-items: center; gap: 10px;
  flex-wrap: wrap; margin-bottom: 28px;
}
.filter-btn {
  padding: 7px 18px; border-radius: 99px;
  font-size: 0.84rem; font-weight: 500;
  color: var(--text-mid); border: 1px solid var(--border);
  cursor: pointer; transition: var(--transition); background: white;
}
.filter-btn:hover { border-color: var(--ochre); color: var(--ochre); }
.filter-btn.active { background: var(--brown); color: white; border-color: var(--brown); }

/* PROJECT CARD */
.project-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.project-card { border-radius: var(--radius-md); overflow: hidden; background: white; transition: transform var(--transition), box-shadow var(--transition); cursor: pointer; position: relative; }
.project-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.project-card:hover .card-img img { transform: scale(1.05); }
.project-card:hover .card-heart { opacity: 1; }
.card-img { position: relative; aspect-ratio: 4/3; overflow: hidden; background: var(--cream-dark); }
.card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.card-badge { position: absolute; bottom: 10px; left: 10px; background: rgba(26,23,20,0.72); backdrop-filter: blur(6px); color: white; font-size: 0.72rem; font-weight: 600; padding: 3px 10px; border-radius: 99px; }
.card-views { position: absolute; bottom: 10px; right: 10px; background: rgba(26,23,20,0.55); backdrop-filter: blur(6px); color: rgba(255,255,255,0.9); font-size: 0.72rem; padding: 3px 9px; border-radius: 99px; display: flex; align-items: center; gap: 4px; }
.card-heart { position: absolute; top: 10px; right: 10px; width: 32px; height: 32px; background: white; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 0.9rem; opacity: 0; transition: var(--transition); box-shadow: var(--shadow-sm); }
.card-heart:hover { transform: scale(1.1); }
.card-body { padding: 14px 16px 16px; }
.card-title { font-family: 'Noto Serif TC', serif; font-size: 0.95rem; font-weight: 600; color: var(--text-dark); margin-bottom: 5px; line-height: 1.4; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.card-company { font-size: 0.78rem; color: var(--brown); font-weight: 500; }

/* PAGINATION */
.pagination { display: flex; align-items: center; justify-content: center; gap: 6px; margin-top: 48px; }
.page-btn { width: 38px; height: 38px; border-radius: var(--radius-sm); border: 1px solid var(--border); display: flex; align-items: center; justify-content: center; font-size: 0.85rem; font-weight: 500; cursor: pointer; transition: var(--transition); color: var(--text-mid); background: white; }
.page-btn:hover { border-color: var(--ochre); color: var(--ochre); }
.page-btn.active { background: var(--brown); color: white; border-color: var(--brown); }
.page-btn.arrow { font-size: 1rem; }

/* FOOTER */
footer { background: var(--text-dark); color: rgba(255,255,255,0.7); padding: 60px 40px 32px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 48px; margin-bottom: 48px; }
.footer-brand .logo-cn { font-family: 'Noto Serif TC', serif; font-size: 1.4rem; font-weight: 700; color: white; margin-bottom: 4px; }
.footer-brand .logo-en { font-size: 0.68rem; letter-spacing: 0.2em; text-transform: uppercase; margin-bottom: 16px; }
.footer-brand p { font-size: 0.85rem; line-height: 1.7; margin-bottom: 20px; }
.footer-social { display: flex; gap: 10px; }
.social-btn { width: 36px; height: 36px; border: 1px solid rgba(255,255,255,0.2); border-radius: 8px; display: flex; align-items: center; justify-content: center; font-size: 0.9rem; color: rgba(255,255,255,0.6); transition: var(--transition); }
.social-btn:hover { border-color: var(--ochre); color: var(--ochre); background: rgba(193,127,75,0.1); }
.footer-col-title { font-family: 'Noto Serif TC', serif; font-size: 0.9rem; font-weight: 600; color: white; margin-bottom: 18px; }
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a { font-size: 0.84rem; color: rgba(255,255,255,0.6); transition: var(--transition); }
.footer-links a:hover { color: var(--ochre-light); }
.footer-contact-item { display: flex; align-items: flex-start; gap: 10px; font-size: 0.84rem; color: rgba(255,255,255,0.6); margin-bottom: 10px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding-top: 24px; display: flex; justify-content: space-between; align-items: center; font-size: 0.78rem; color: rgba(255,255,255,0.4); }

/* BACK TO TOP */
.back-to-top { position: fixed; bottom: 32px; right: 32px; width: 44px; height: 44px; background: var(--brown); color: white; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 1rem; box-shadow: var(--shadow-md); z-index: 1500; opacity: 0; transform: translateY(8px); transition: var(--transition); pointer-events: none; }
.back-to-top.show { opacity: 1; transform: translateY(0); pointer-events: all; }
.back-to-top:hover { background: var(--ochre); transform: translateY(-2px); }

/* FADE IN */
.fade-in { opacity: 0; transform: translateY(20px); transition: opacity 0.6s ease, transform 0.6s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* AI MODAL ── 連續對話版 */
.ai-modal-overlay { position: fixed; inset: 0; background: rgba(26,23,20,0.5); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); z-index: 3000; display: flex; align-items: flex-start; justify-content: center; padding: 60px 20px 20px; opacity: 0; pointer-events: none; transition: opacity var(--transition); }
.ai-modal-overlay.open { opacity: 1; pointer-events: all; }
.ai-modal { background: white; border-radius: var(--radius-lg); width: 100%; max-width: 680px; max-height: calc(100vh - 100px); box-shadow: var(--shadow-lg); overflow: hidden; transform: translateY(-16px); transition: transform var(--transition); display: flex; flex-direction: column; }
.ai-modal-overlay.open .ai-modal { transform: translateY(0); }

/* ── Header（深色漸層） */
.ai-modal-header {
  padding: 18px 22px 16px;
  background: linear-gradient(135deg, var(--brown) 0%, var(--ochre) 100%);
  display: flex; align-items: center; gap: 12px; flex-shrink: 0;
}
.ai-modal-title { font-family: 'Noto Serif TC', serif; font-size: 1rem; font-weight: 700; color: white; margin-bottom: 2px; }
.ai-modal-sub { font-size: 0.78rem; color: rgba(255,255,255,0.75); }

/* ── 對話記錄捲動區 */
.ai-chat-log {
  flex: 1;
  overflow-y: auto;
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-height: 220px;
  max-height: 360px;
  background: var(--cream);
  scroll-behavior: smooth;
}
.ai-chat-log::-webkit-scrollbar { width: 4px; }
.ai-chat-log::-webkit-scrollbar-track { background: transparent; }
.ai-chat-log::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

/* ── 氣泡共用 */
.ai-bubble { display: flex; gap: 8px; max-width: 92%; animation: bubbleFade 0.25s ease; }
@keyframes bubbleFade { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: translateY(0); } }
.ai-bubble-bot { align-self: flex-start; }
.ai-bubble-user { align-self: flex-end; flex-direction: row-reverse; }

/* ── Bot 頭像 */
.ai-bubble-avatar {
  width: 28px; height: 28px; border-radius: 50%;
  background: linear-gradient(135deg, var(--brown), var(--ochre));
  color: white; display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; margin-top: 2px;
}

/* ── 氣泡文字框 */
.ai-bubble-text {
  padding: 10px 14px;
  border-radius: 14px;
  font-size: 0.875rem;
  line-height: 1.75;
  word-break: break-word;
}
.ai-bubble-bot .ai-bubble-text {
  background: white;
  color: var(--text-dark);
  border-radius: 4px 14px 14px 14px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.07);
}
.ai-bubble-user .ai-bubble-text {
  background: var(--ochre);
  color: white;
  border-radius: 14px 4px 14px 14px;
}

/* ── Typing 動畫泡泡 */
.ai-typing-dots { display: flex; align-items: center; gap: 5px; padding: 10px 16px; min-width: 52px; }
.ai-typing-dots span { width: 7px; height: 7px; border-radius: 50%; background: var(--ochre); animation: dotBounce 1.2s ease infinite; }
.ai-typing-dots span:nth-child(2) { animation-delay: 0.2s; }
.ai-typing-dots span:nth-child(3) { animation-delay: 0.4s; }
@keyframes dotBounce { 0%, 60%, 100% { transform: translateY(0); opacity: 0.4; } 30% { transform: translateY(-5px); opacity: 1; } }

/* ── 輸入區 */
.ai-modal-input-wrap { padding: 10px 16px; position: relative; background: white; border-top: 1px solid var(--border); flex-shrink: 0; }
.ai-modal-input { width: 100%; padding: 12px 48px 12px 44px; border: 1.5px solid var(--border); border-radius: var(--radius-md); font-size: 0.92rem; font-family: inherit; color: var(--text-dark); outline: none; background: var(--cream); transition: border-color 0.2s, box-shadow 0.2s; }
.ai-modal-input:focus { border-color: var(--ochre); box-shadow: 0 0 0 3px rgba(193,127,75,0.1); background: white; }
.ai-modal-input::placeholder { color: var(--text-light); }
.modal-search-icon { position: absolute; left: 30px; top: 50%; transform: translateY(-50%); pointer-events: none; color: var(--text-light); }
.modal-search-send { position: absolute; right: 26px; top: 50%; transform: translateY(-50%); width: 32px; height: 32px; background: var(--ochre); border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center; color: white; cursor: pointer; transition: var(--transition); border: none; }
.modal-search-send:hover { background: var(--brown); }
.modal-search-send:disabled { background: var(--border); cursor: not-allowed; }

/* ── Loading / Results (legacy, 保留相容) */
.ai-loading { padding: 12px 20px; display: none; align-items: center; gap: 12px; color: var(--text-light); font-size: 0.85rem; }
.ai-loading.show { display: flex; }
.dot-animation { display: flex; gap: 4px; }
.dot-animation span { width: 6px; height: 6px; border-radius: 50%; background: var(--ochre); animation: dotBounce 1.2s ease infinite; }
.dot-animation span:nth-child(2) { animation-delay: 0.2s; }
.dot-animation span:nth-child(3) { animation-delay: 0.4s; }
.ai-results { display: none; flex-direction: column; gap: 0; }
.ai-results.show { display: flex; }
.ai-result-label { font-size: 0.75rem; font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-light); padding: 10px 28px 6px; border-top: 1px solid var(--border); }
.ai-result-item { display: flex; align-items: center; gap: 14px; padding: 12px 28px; transition: var(--transition); cursor: pointer; }
.ai-result-item:hover { background: var(--cream); }
.result-thumb { width: 52px; height: 40px; border-radius: 6px; overflow: hidden; flex-shrink: 0; background: var(--cream-dark); }
.result-thumb img { width: 100%; height: 100%; object-fit: cover; }
.result-info { flex: 1; }
.result-title { font-size: 0.88rem; font-weight: 600; color: var(--text-dark); margin-bottom: 2px; }
.result-sub { font-size: 0.77rem; color: var(--text-light); }
.result-arrow { color: var(--text-light); font-size: 0.85rem; }

/* ── Footer（快速 chips） */
.ai-modal-footer { padding: 10px 16px; background: white; border-top: 1px solid var(--border); display: flex; align-items: center; gap: 12px; justify-content: space-between; flex-shrink: 0; }
.modal-quick-chips { display: flex; gap: 6px; flex-wrap: wrap; }
.modal-chip { font-size: 0.75rem; color: var(--text-mid); background: var(--cream); border: 1px solid var(--border); padding: 3px 10px; border-radius: 99px; cursor: pointer; transition: var(--transition); }
.modal-chip:hover { border-color: var(--ochre); color: var(--ochre); background: rgba(193,127,75,0.06); }
.modal-close-btn { font-size: 0.78rem; color: var(--text-light); display: flex; align-items: center; gap: 4px; flex-shrink: 0; cursor: pointer; background: none; border: none; white-space: nowrap; }
.modal-close-btn:hover { color: var(--text-dark); }

.promt-quota { font-size: 0.8rem; color: var(--ochre);}

/* ── AI 推薦圖卡列 ── */
.ai-rec-row {
  display: flex; gap: 8px; flex-wrap: nowrap; overflow-x: auto;
  padding: 8px 2px 4px; margin-top: 8px;
  scrollbar-width: thin; scrollbar-color: var(--border) transparent;
}
.ai-rec-row::-webkit-scrollbar { height: 3px; }
.ai-rec-row::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }
.ai-rec-card {
  flex-shrink: 0; width: 140px; border-radius: 10px; overflow: hidden;
  border: 1.5px solid var(--border); background: white;
  text-decoration: none; color: inherit;
  transition: box-shadow .2s, transform .2s, border-color .2s;
  display: flex; flex-direction: column;
}
.ai-rec-card:hover { box-shadow: 0 4px 16px rgba(0,0,0,.12); transform: translateY(-2px); border-color: var(--ochre-light); }
.ai-rec-thumb {
  position: relative; width: 100%; padding-top: 62%; /* ~16:10 */
  background: var(--cream-dark); overflow: hidden; flex-shrink: 0;
}
.ai-rec-thumb img {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: cover; transition: transform .3s;
}
.ai-rec-card:hover .ai-rec-thumb img { transform: scale(1.04); }
.ai-rec-thumb-placeholder {
  position: absolute; inset: 0; display: flex; align-items: center;
  justify-content: center; color: var(--text-light);
}
.ai-rec-type {
  position: absolute; top: 5px; left: 5px;
  font-size: .6rem; font-weight: 700; padding: 2px 6px; border-radius: 99px;
  background: rgba(193,127,75,.88); color: white; letter-spacing: .03em;
  backdrop-filter: blur(4px);
}
.ai-rec-type-work { background: rgba(45,120,196,.88); }
.ai-rec-info { padding: 8px 9px 10px; flex: 1; }
.ai-rec-name {
  font-size: .78rem; font-weight: 700; color: var(--text-dark);
  line-height: 1.4; margin-bottom: 3px;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.ai-rec-meta { font-size: .68rem; color: var(--text-light); margin-bottom: 2px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.ai-rec-budget { font-size: .68rem; color: var(--ochre); font-weight: 600; }

/* ===== HAMBURGER BUTTON ===== */
.hamburger-btn {
  display: none;
  width: 40px; height: 40px;
  border-radius: var(--radius-sm);
  align-items: center; justify-content: center;
  flex-direction: column; gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 8px;
  transition: var(--transition);
  flex-shrink: 0;
}
.hamburger-btn:hover { background: var(--cream); }
.hamburger-btn .bar {
  display: block;
  width: 22px; height: 2px;
  background: var(--text-dark);
  border-radius: 99px;
  transition: transform 0.35s ease, opacity 0.35s ease, width 0.35s ease;
  transform-origin: center;
}
/* X state */
.hamburger-btn.open .bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger-btn.open .bar:nth-child(2) { opacity: 0; width: 0; }
.hamburger-btn.open .bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===== MOBILE MENU DRAWER ===== */
.mobile-menu {
  position: fixed;
  top: var(--navbar-h); left: 0; right: 0;
  background: rgba(255,255,255,0.98);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  z-index: 999;
  transform: translateY(-8px);
  opacity: 0;
  pointer-events: none;
  transition: transform 0.35s ease, opacity 0.35s ease;
  border-bottom: 1px solid var(--border);
  box-shadow: 0 12px 40px rgba(26,23,20,0.12);
}
.mobile-menu.open {
  transform: translateY(0);
  opacity: 1;
  pointer-events: all;
}
.mobile-menu-inner {
  padding: 20px 24px 28px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.mobile-menu-inner a {
  display: flex; align-items: center;
  justify-content: space-between;
  padding: 13px 16px;
  border-radius: var(--radius-sm);
  font-family: 'Noto Serif TC', serif;
  font-size: 1rem; font-weight: 500;
  color: var(--text-dark);
  transition: var(--transition);
  border: 1px solid transparent;
}
.mobile-menu-inner a:hover { background: var(--cream); color: var(--ochre); }
.mobile-menu-inner a.active { color: var(--ochre); background: rgba(193,127,75,0.07); }
.mobile-menu-inner a.mobile-cta {
  background: var(--brown); color: white;
  border-color: var(--brown);
  font-weight: 700; margin-top: 6px;
  justify-content: center;
}
.mobile-menu-inner a.mobile-cta:hover { background: var(--ochre); border-color: var(--ochre); }
.mobile-menu-arrow { font-size: 0.8rem; opacity: 0.4; }
.mobile-menu-divider {
  height: 1px; background: var(--border);
  margin: 6px 0;
}
/* Overlay backdrop */
.mobile-menu-backdrop {
  position: fixed; inset: 0;
  top: var(--navbar-h);
  background: rgba(26,23,20,0.25);
  z-index: 998;
  opacity: 0; pointer-events: none;
  transition: opacity 0.35s ease;
}
.mobile-menu-backdrop.open { opacity: 1; pointer-events: all; }

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .project-grid { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid > :first-child { grid-column: 1 / -1; }
}
@media (max-width: 768px) {
  :root { --navbar-h: 60px; }
  .navbar { padding: 0 16px; gap: 8px; }
  .nav-links { display: none; }
  /* ★ nav-actions 推到最右邊 */
  .nav-actions { margin-left: auto; gap: 8px; }
  .hamburger-btn { display: flex; }
  .section { padding: 48px 20px; }
  .page-hero { padding: 48px 20px 36px; }
  .page-hero h1 { font-size: 1.8rem; }
  .project-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
  footer { padding: 48px 20px 24px; }
  .container { padding: 0 20px; }
  /* 隱藏登入/CTA按鈕（只在行動版） */
  .nav-login-btn { font-size:.75rem; padding:5px 14px; }
  .nav-btn-cta  { display: none; }
  .nav-btn-fill { display: none; }
  /* 會員按鈕手機版：只顯示頭像圓形 */
  .nav-user-btn .nav-user-name  { display: none; }
  .nav-user-btn .nav-user-arrow { display: none; }
  .nav-user-btn { padding: 2px; border-radius: 50%; min-width: 36px; min-height: 36px; justify-content: center; }
}
@media (max-width: 480px) {
  .project-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ===== 無障礙：focus 樣式 ===== */
button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--ochre);
  outline-offset: 2px;
}

/* ── AUTH NAV STYLES ── */
.nav-btn-cta {
  background: var(--ochre); color: white;
  padding: 8px 20px; border-radius: 99px;
  font-size: .875rem; font-weight: 600;
  transition: var(--transition); white-space: nowrap;
  display: inline-flex; align-items: center;
}
.nav-btn-cta:hover { background: #A86B3A; color: white; }

.nav-user-menu { position: relative; display: inline-flex; align-items: center; }
.nav-user-btn {
  display: flex; align-items: center; gap: 8px;
  padding: 4px 12px 4px 4px;
  border-radius: 99px;
  border: 1.5px solid var(--border);
  background: white; cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}
.nav-user-btn:hover { border-color: var(--ochre); }
.nav-user-name { font-size:.85rem; font-weight:600; color:var(--text-dark); max-width:80px; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
.nav-user-arrow { flex-shrink:0; color: var(--text-mid); }

/* ★ Dropdown 固定在視窗內，不受 navbar 的 stacking context 限制 */
.nav-user-dropdown {
  position: fixed;
  /* top / right 由 JS 動態計算注入 inline style */
  background: white; border: 1px solid var(--border);
  border-radius: var(--radius-md); box-shadow: 0 8px 32px rgba(0,0,0,.18);
  min-width: 210px; overflow: hidden;
  opacity: 0; pointer-events: none;
  transform: translateY(-6px);
  transition: opacity .18s ease, transform .18s ease;
  z-index: 9999;
}
.nav-user-dropdown.open {
  opacity: 1; pointer-events: all; transform: translateY(0);
}
/* Dropdown 內部元素 */
.nav-drop-header { padding: 14px 16px; border-bottom: 1px solid var(--border); background: var(--cream); }
.nav-drop-name   { font-size:.88rem; font-weight:700; color:var(--text-dark); }
.nav-drop-email  { font-size:.75rem; color:var(--text-light); margin-top:2px; word-break:break-all; }
.nav-drop-link {
  display: flex; align-items: center; gap: 10px;
  padding: 11px 16px; font-size:.875rem; color:var(--text-dark);
  text-decoration: none; transition: background .15s;
}
.nav-drop-link:hover { background: var(--cream); }
.nav-drop-footer { border-top: 1px solid var(--border); padding: 8px; }
.nav-drop-logout {
  width: 100%; display: flex; align-items: center; gap: 10px;
  padding: 9px 8px; font-size:.875rem; color:var(--text-light);
  border: none; background: none; cursor: pointer;
  border-radius: var(--radius-sm); font-family: inherit;
  transition: background .15s, color .15s;
}
.nav-drop-logout:hover { background: var(--cream); color: var(--text-dark); }