/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  /* ── 全站色系 ── */
  --color-primary:       #0369a1;   /* 深海藍 */
  --color-primary-hover: #025d90;
  --color-primary-light: #e0f2fe;
  --color-accent:        #f97316;   /* 活力橘 */
  --color-accent-hover:  #ea6c0a;
  --color-dark:          #0f172a;   /* 深夜藍（Header / Footer） */
  --color-dark-mid:      #1e293b;   /* 次深色 */
  --color-text:          #1e293b;
  --color-muted:         #64748b;
  --color-border:        #e2e8f0;
  --color-bg:            #f0f5fa;
  --color-white:         #ffffff;
  --color-line:          #06c755;

  /* ── 運動分類色 ── */
  --cat-swimming:   #0284c7;
  --cat-badminton:  #16a34a;
  --cat-basketball: #dc2626;
  --cat-athletics:  #d97706;

  /* ── 尺寸 ── */
  --header-h:   68px;
  --logo-w:     160px;
  --radius:     10px;
  --radius-sm:  6px;
  --shadow-sm:  0 1px 4px rgba(15,23,42,.08);
  --shadow:     0 4px 16px rgba(15,23,42,.10);
  --shadow-lg:  0 8px 32px rgba(15,23,42,.14);
  --transition: .22s ease;
}

html { scroll-behavior: smooth; }
body {
  font-family: 'Noto Sans TC', 'PingFang TC', sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; }
img { display: block; max-width: 100%; }
ul { list-style: none; }

/* ===== HEADER ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: linear-gradient(135deg, #0f172a 0%, #1a2744 100%);
  border-bottom: 3px solid var(--color-accent);
  box-shadow: 0 2px 16px rgba(0,0,0,.35);
}
.header-inner {
  display: flex;
  align-items: center;
  height: 100%;
  width: 100%;
  padding: 0 24px;
}

/* LOGO */
.logo {
  flex: 0 0 var(--logo-w);
  display: flex;
  align-items: center;
  overflow: hidden;
}
.logo img { height: 42px; width: auto; max-width: 100%; }

/* 漢堡（手機） */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none; border: none;
  cursor: pointer; padding: 6px;
  margin-left: auto; flex-shrink: 0;
}
.nav-toggle span {
  display: block;
  width: 24px; height: 2px;
  background: #fff; border-radius: 2px;
  transition: var(--transition);
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* 主導覽 */
.main-nav { flex: 1; display: flex; align-items: center; }
.nav-list {
  flex: 1;
  display: flex; align-items: center;
  justify-content: center;
  gap: 4px;
}
.nav-link {
  display: block;
  padding: 7px 15px;
  color: rgba(255,255,255,.8);
  font-size: .9rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  letter-spacing: .02em;
  transition: var(--transition);
  white-space: nowrap;
}
.nav-link:hover {
  color: #fff;
  background: rgba(255,255,255,.1);
}
.nav-link.active {
  color: #fff;
  background: rgba(249,115,22,.2);   /* 橘色透明底 */
  border: 1px solid rgba(249,115,22,.35);
}

/* 下拉選單 */
.has-dropdown { position: relative; }
/* 透明橋接：向下延伸 li 的 hover 感應區，填補連結到選單之間的空隙 */
.has-dropdown::after {
  content: '';
  position: absolute;
  bottom: -10px; left: 0; right: 0;
  height: 10px;
}
.dropdown {
  display: none;
  position: absolute;
  top: calc(100% + 10px);
  left: 50%; transform: translateX(-50%);
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  min-width: 136px;
  overflow: hidden;
  z-index: 200;
  border: 1px solid var(--color-border);
}
.dropdown li a {
  display: flex; align-items: center;
  padding: 10px 18px;
  font-size: .875rem;
  color: var(--color-text);
  transition: var(--transition);
  gap: 8px;
}
.dropdown li a:hover {
  background: var(--color-primary-light);
  color: var(--color-primary);
  padding-left: 22px;
}
.has-dropdown:hover .dropdown { display: block; }
.arrow { font-size: .65rem; opacity: .6; margin-left: 2px; }

/* ===== 頂部登入按鈕（未登入） ===== */
.header-actions { flex-shrink: 0; display: flex; align-items: center; gap: 10px; }

.btn-header-login {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 18px;
  border: 1.5px solid rgba(255,255,255,.32);
  border-radius: 22px;
  background: rgba(255,255,255,.07);
  color: #fff;
  font-size: .875rem; font-weight: 600; letter-spacing: .02em;
  cursor: pointer; transition: var(--transition);
  white-space: nowrap;
}
.btn-header-login:hover {
  background: rgba(255,255,255,.18);
  border-color: rgba(255,255,255,.65);
}

/* ===== 頂部使用者選單（已登入） ===== */
.header-user {
  position: relative;
  display: inline-flex; align-items: center; gap: 8px;
  padding: 4px 12px 4px 4px;
  border: 1.5px solid rgba(255,255,255,.2);
  border-radius: 22px;
  cursor: pointer; transition: var(--transition);
}
.header-user:hover { background: rgba(255,255,255,.08); border-color: rgba(255,255,255,.45); }
.header-avatar {
  width: 32px; height: 32px; border-radius: 50%;
  object-fit: cover; border: 2px solid rgba(255,255,255,.3);
  background: var(--color-accent);
}
.header-username {
  font-size: .875rem; font-weight: 600; color: #fff;
  max-width: 80px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.header-user-arrow { color: rgba(255,255,255,.55); font-size: .7rem; }
.header-user-dropdown {
  display: none;
  position: absolute; top: calc(100% + 8px); right: 0;
  background: #fff; border-radius: var(--radius);
  box-shadow: 0 8px 32px rgba(0,0,0,.18);
  min-width: 170px; overflow: hidden;
  border: 1px solid var(--color-border);
  z-index: 200;
}
.header-user.open .header-user-dropdown { display: block; }
.header-user-dropdown a,
.header-user-dropdown button {
  display: flex; align-items: center; gap: 9px;
  padding: 12px 16px; width: 100%;
  text-align: left; font-size: .875rem;
  color: var(--color-text); background: none; border: none;
  cursor: pointer; transition: background .15s; text-decoration: none;
}
.header-user-dropdown a:hover,
.header-user-dropdown button:hover { background: var(--color-bg); }
.header-user-dropdown .hud-divider { height: 1px; background: var(--color-border); margin: 4px 0; }
.header-user-dropdown .hud-logout { color: #dc2626; }

/* ===== 手機版登入 ===== */
.nav-login-mobile {
  display: none;
  padding: 20px 20px 8px;
  border-top: 1px solid rgba(255,255,255,.08);
  margin-top: 8px;
}
.btn-mobile-login {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  width: 100%; padding: 12px 20px;
  border: 1.5px solid rgba(255,255,255,.25);
  border-radius: 12px; background: rgba(255,255,255,.07);
  color: #fff; font-size: .95rem; font-weight: 600;
  cursor: pointer; transition: var(--transition);
}
.btn-mobile-login:hover { background: rgba(255,255,255,.15); }

/* ===== 登入彈框 ===== */
.login-overlay {
  display: none; position: fixed; inset: 0;
  background: rgba(15,23,42,.75);
  backdrop-filter: blur(5px); -webkit-backdrop-filter: blur(5px);
  z-index: 900; align-items: center; justify-content: center; padding: 16px;
}
.login-overlay.open { display: flex; }

.login-modal {
  background: #fff; border-radius: 20px;
  width: 100%; max-width: 400px; position: relative;
  box-shadow: 0 24px 80px rgba(0,0,0,.3);
  animation: loginIn .25s ease; overflow: hidden;
}
@keyframes loginIn {
  from { transform: translateY(28px) scale(.96); opacity: 0; }
  to   { transform: none; opacity: 1; }
}

.login-close {
  position: absolute; top: 14px; right: 14px;
  width: 30px; height: 30px; border-radius: 50%;
  background: rgba(255,255,255,.15); border: none;
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  font-size: .9rem; color: rgba(255,255,255,.8);
  transition: var(--transition); z-index: 2;
}
.login-close:hover { background: rgba(255,255,255,.3); color: #fff; }

.login-top {
  background: linear-gradient(135deg, #0f172a 0%, #1a2744 60%, #0c3060 100%);
  padding: 44px 32px 36px; text-align: center;
}
.login-brand-icon {
  width: 68px; height: 68px; border-radius: 18px;
  background: var(--color-accent);
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 2.2rem; margin-bottom: 18px;
  box-shadow: 0 8px 28px rgba(249,115,22,.45);
}
.login-top h2 { font-size: 1.35rem; font-weight: 800; color: #fff; margin-bottom: 8px; }
.login-top p  { font-size: .84rem; color: rgba(255,255,255,.6); line-height: 1.75; }

.login-body { padding: 28px 28px 20px; }

.btn-line-oauth {
  display: flex; align-items: center; justify-content: center; gap: 10px;
  width: 100%; padding: 15px 20px;
  background: #06C755; border: none; border-radius: 12px;
  color: #fff; font-size: 1rem; font-weight: 700; letter-spacing: .03em;
  cursor: pointer; text-decoration: none;
  box-shadow: 0 4px 16px rgba(6,199,85,.38);
  transition: background .2s, transform .15s, box-shadow .2s;
}
.btn-line-oauth:hover {
  background: #05b34c; color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(6,199,85,.5);
}

.login-footer-note {
  text-align: center; font-size: .73rem;
  color: var(--color-muted); padding: 0 28px 24px; line-height: 1.8;
}
.login-footer-note a { color: var(--color-primary); }
.login-footer-note a:hover { text-decoration: underline; }

/* LINE 登入按鈕（footer 保留舊樣式） */
.btn-line-login {
  display: inline-flex; align-items: center;
  cursor: pointer; border-radius: var(--radius-sm);
  overflow: hidden; transition: var(--transition);
}
.btn-line-login img { height: 36px; width: auto; display: block; }
.btn-line-login:hover { opacity: .87; transform: translateY(-1px); }

/* ===== BANNER ===== */
.banner-section { position: relative; background: #090e1a; }
.banner-slider { position: relative; overflow: hidden; }
.banner-track { display: flex; transition: transform .55s cubic-bezier(.4,0,.2,1); will-change: transform; }
.banner-slide { position: relative; min-width: 100%; }

.banner-slide picture,
.banner-slide img {
  display: block; width: 100%;
  height: clamp(240px, 31.25vw, 800px);
  object-fit: cover;
}

/* banner 漸層遮罩（下方更深，讓文字清晰） */
.banner-slide::after {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(9,14,26,.75) 0%, rgba(9,14,26,.15) 60%, transparent 100%);
  pointer-events: none;
}

.banner-caption {
  position: absolute;
  bottom: clamp(24px, 6%, 64px);
  left: 50%; transform: translateX(-50%);
  text-align: center;
  color: #fff;
  width: min(90%, 820px);
  z-index: 2;
}
.banner-caption h2 {
  font-size: clamp(1.4rem, 3.5vw, 2.8rem);
  font-weight: 800;
  margin-bottom: 8px;
  line-height: 1.2;
  text-shadow: 0 2px 12px rgba(0,0,0,.6);
}
.banner-caption p {
  font-size: clamp(.85rem, 1.5vw, 1.1rem);
  margin-bottom: 20px;
  opacity: .88;
  text-shadow: 0 1px 6px rgba(0,0,0,.5);
}
.btn-primary {
  display: inline-block;
  background: linear-gradient(135deg, var(--color-accent), #fb923c);
  color: #fff;
  padding: 12px 32px;
  border-radius: 28px;
  font-weight: 700;
  font-size: .95rem;
  box-shadow: 0 4px 16px rgba(249,115,22,.4);
  transition: var(--transition);
}
.btn-primary:hover {
  background: linear-gradient(135deg, var(--color-accent-hover), var(--color-accent));
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(249,115,22,.5);
}

/* 輪播控制 */
.banner-prev, .banner-next {
  position: absolute;
  top: 50%; transform: translateY(-50%);
  background: rgba(15,23,42,.5);
  border: 1px solid rgba(255,255,255,.15);
  color: #fff; font-size: 1.8rem; line-height: 1;
  padding: 10px 16px;
  cursor: pointer; border-radius: var(--radius-sm);
  transition: var(--transition); z-index: 10;
  backdrop-filter: blur(4px);
}
.banner-prev { left: 16px; }
.banner-next { right: 16px; }
.banner-prev:hover, .banner-next:hover {
  background: rgba(249,115,22,.7);
  border-color: transparent;
}
.banner-dots {
  position: absolute; bottom: 16px; right: 22px;
  display: flex; gap: 7px; z-index: 2;
}
.banner-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: rgba(255,255,255,.45);
  border: none; cursor: pointer; transition: var(--transition);
}
.banner-dot.active {
  background: var(--color-accent);
  transform: scale(1.3);
  box-shadow: 0 0 6px rgba(249,115,22,.6);
}

/* ===== MAIN CONTENT ===== */
.main-content { max-width: 1200px; margin: 0 auto; padding: 40px 16px 60px; }

/* ===== DUAL TAB ===== */
.dual-section { margin-bottom: 56px; }

.dual-tabs {
  display: flex;
  border-radius: var(--radius) var(--radius) 0 0;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-bottom: none;
}
.dual-tab {
  flex: 1;
  display: flex; align-items: center; justify-content: center;
  gap: 10px; padding: 18px 12px;
  background: #e8eef6;
  border: none; cursor: pointer;
  font-size: 1.05rem; font-weight: 700;
  color: var(--color-muted);
  transition: var(--transition);
  border-bottom: 3px solid transparent;
  position: relative;
}
.dual-tab + .dual-tab { border-left: 1px solid var(--color-border); }
.dual-tab:hover { background: #dce5f0; color: var(--color-dark-mid); }
.dual-tab.active {
  background: var(--color-white);
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}
.dual-tab-icon { font-size: 1.35rem; }
.dual-tab-label { letter-spacing: .03em; }

.dual-panel {
  display: none;
  background: var(--color-white);
  border-radius: 0 0 var(--radius) var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--color-border);
  border-top: none;
  padding: 24px;
}
.dual-panel.active { display: block; }

.panel-toolbar {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 10px; margin-bottom: 20px;
}
.section-more {
  color: var(--color-primary); font-size: .875rem; white-space: nowrap;
  font-weight: 500;
}
.section-more:hover { text-decoration: underline; }

/* 分類標籤 */
.category-tabs { display: flex; flex-wrap: wrap; gap: 8px; }
.tab-btn {
  padding: 6px 16px;
  border: 1.5px solid var(--color-border);
  border-radius: 20px;
  background: #fff; color: var(--color-muted);
  font-size: .84rem; cursor: pointer; transition: var(--transition);
}
.tab-btn:hover { border-color: var(--color-primary); color: var(--color-primary); }
.tab-btn.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
  box-shadow: 0 2px 8px rgba(3,105,161,.25);
}

/* 即將推出 */
.coming-soon { text-align: center; padding: 60px 20px; color: var(--color-muted); }
.coming-soon-icon { font-size: 3.5rem; margin-bottom: 16px; }
.coming-soon h3 { font-size: 1.4rem; color: var(--color-text); margin-bottom: 10px; font-weight: 700; }
.coming-soon p { font-size: .95rem; margin-bottom: 24px; line-height: 1.8; }
.btn-notify {
  display: inline-block;
  background: var(--color-primary); color: #fff;
  padding: 11px 28px; border-radius: 24px;
  font-weight: 600; font-size: .9rem;
  box-shadow: 0 3px 10px rgba(3,105,161,.3);
  transition: var(--transition);
}
.btn-notify:hover { background: var(--color-primary-hover); transform: translateY(-1px); }

/* ===== 活動卡片 =====
   封面圖建議：800 × 480 px（5:3），< 150KB
============================== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}
.activity-card {
  background: var(--color-white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  display: flex; flex-direction: column;
  border: 1px solid var(--color-border);
  transition: transform var(--transition), box-shadow var(--transition);
}
.activity-card.upcoming:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

/* 已結束 */
.activity-card.ended {
  background: #f7f8fa;
  filter: grayscale(55%);
  opacity: .78;
}
.activity-card.ended .card-image img { opacity: .65; }

.card-image { position: relative; overflow: hidden; }
.card-image img {
  width: 100%; height: 185px; object-fit: cover;
  transition: transform .4s ease;
}
.activity-card.upcoming:hover .card-image img { transform: scale(1.04); }

/* 圖片失敗佔位 */
.img-placeholder {
  height: 185px; background: #dde3ed;
  display: flex; align-items: center; justify-content: center;
}
.img-placeholder::after { content: '🖼'; font-size: 2rem; opacity: .35; }

/* 分類徽章 */
.card-badge {
  position: absolute; top: 10px; left: 10px;
  color: #fff; font-size: .72rem; font-weight: 700;
  padding: 3px 10px; border-radius: 12px;
  letter-spacing: .03em;
  background: var(--color-primary);
}
.badge-swimming   { background: var(--cat-swimming); }
.badge-badminton  { background: var(--cat-badminton); }
.badge-basketball { background: var(--cat-basketball); }
.badge-athletics  { background: var(--cat-athletics); }

/* 狀態標籤 */
.card-tag {
  position: absolute; top: 10px; right: 10px;
  font-size: .7rem; font-weight: 800;
  padding: 3px 10px; border-radius: 10px;
  letter-spacing: .04em;
}
.tag-upcoming {
  background: var(--color-accent); color: #fff;
  box-shadow: 0 2px 6px rgba(249,115,22,.35);
}
.tag-ended { background: #94a3b8; color: #fff; }

.card-body { padding: 15px 16px; flex: 1; }
.card-title { font-size: 1rem; font-weight: 700; margin-bottom: 10px; line-height: 1.45; color: var(--color-text); }
.card-meta { display: flex; flex-direction: column; gap: 5px; }
.card-meta li {
  font-size: .82rem; color: var(--color-muted);
  display: flex; align-items: center; gap: 6px;
}

.card-quota { margin-top: 13px; }
.quota-bar {
  height: 5px; background: var(--color-border);
  border-radius: 3px; overflow: hidden; margin-bottom: 5px;
}
.quota-fill { height: 100%; background: var(--color-accent); border-radius: 3px; }
.quota-text { font-size: .8rem; color: var(--color-muted); }
.quota-text strong { color: var(--color-accent); font-weight: 700; }

.card-footer { padding: 12px 16px; border-top: 1px solid var(--color-border); }
.btn-register {
  display: block; text-align: center;
  background: linear-gradient(135deg, var(--color-accent), #fb923c);
  color: #fff; padding: 10px;
  border-radius: var(--radius-sm);
  font-weight: 700; font-size: .9rem;
  box-shadow: 0 2px 8px rgba(249,115,22,.3);
  transition: var(--transition);
}
.btn-register:hover {
  background: linear-gradient(135deg, var(--color-accent-hover), var(--color-accent));
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(249,115,22,.4);
}
.btn-ended {
  display: block; text-align: center;
  background: #cbd5e1; color: #64748b;
  padding: 10px; border-radius: var(--radius-sm);
  font-weight: 600; font-size: .9rem;
  cursor: default;
}

/* ===== 贊助單位 ===== */
.sponsors-section { margin: 10px 0 20px; text-align: center; }
.sponsors-title {
  font-size: .95rem; color: var(--color-muted);
  font-weight: 600; letter-spacing: .1em;
  text-transform: uppercase; margin-bottom: 20px;
}
.sponsors-title::before, .sponsors-title::after {
  content: '';
  display: inline-block;
  width: 36px; height: 1px;
  background: var(--color-border);
  vertical-align: middle; margin: 0 12px;
}
.sponsors-swiper { padding: 0 10px 4px; }
.sponsor-logo {
  display: flex; align-items: center; justify-content: center;
  height: 72px; padding: 10px 16px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: var(--transition);
}
.sponsor-logo:hover { box-shadow: var(--shadow); border-color: #c7d4e6; }
.sponsor-logo img {
  max-height: 48px; width: auto; max-width: 100%;
  object-fit: contain;
  filter: grayscale(55%); opacity: .65;
  transition: var(--transition);
}
.sponsor-logo:hover img { filter: grayscale(0); opacity: 1; }
.sponsor-placeholder { background: #f8fafc; }
.sponsor-placeholder::after { content: 'LOGO'; font-size: .8rem; color: #b0bec5; }

/* ===== FOOTER ===== */
.site-footer {
  background: linear-gradient(180deg, var(--color-dark-mid) 0%, var(--color-dark) 100%);
  color: rgba(255,255,255,.6);
  border-top: 3px solid var(--color-accent);
}
.footer-inner {
  max-width: 1200px; margin: 0 auto;
  padding: 48px 24px 32px;
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 48px;
}
.footer-logo { display: block; margin-bottom: 10px; }
.footer-logo-img { max-height: 48px; width: auto; display: block; }
.footer-slogan { font-size: .84rem; margin-bottom: 20px; line-height: 1.75; }
.footer-line-btn .btn-line-login img { height: 36px; }

.footer-links { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.footer-col h4 {
  color: rgba(255,255,255,.9); font-size: .85rem; font-weight: 600;
  margin-bottom: 14px; letter-spacing: .06em; text-transform: uppercase;
}
.footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-col a { font-size: .82rem; transition: var(--transition); }
.footer-col a:hover { color: #fff; padding-left: 4px; }

.footer-bottom {
  background: rgba(0,0,0,.3); text-align: center;
  padding: 14px; font-size: .78rem;
  color: rgba(255,255,255,.3);
}

/* ===== RWD ===== */
@media (max-width: 767px) {
  .banner-slide picture,
  .banner-slide img { height: clamp(320px, 128vw, 600px); }
}

@media (max-width: 900px) {
  .footer-inner { grid-template-columns: 1fr; gap: 24px; }
}

@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .header-actions { display: none; }

  .main-nav {
    position: fixed;
    top: var(--header-h); right: 0; bottom: 0; width: 275px;
    background: linear-gradient(180deg, #0f172a 0%, #162032 100%);
    flex-direction: column; align-items: stretch; justify-content: flex-start;
    padding: 12px 0 24px;
    transform: translateX(110%);
    transition: transform var(--transition);
    overflow-y: auto; z-index: 99;
    box-shadow: -4px 0 28px rgba(0,0,0,.5);
    border-left: 1px solid rgba(249,115,22,.2);
  }
  .main-nav.open { transform: translateX(0); }

  .nav-list { flex-direction: column; align-items: stretch; gap: 0; justify-content: flex-start; }
  .nav-link { padding: 13px 22px; border-radius: 0; font-size: 1rem; }
  .nav-link.active { background: rgba(249,115,22,.15); border-radius: 0; border: none; }

  .has-dropdown .dropdown {
    display: none; position: static; transform: none;
    box-shadow: none; border-radius: 0; border: none;
    background: rgba(255,255,255,.05);
  }
  .has-dropdown.open .dropdown { display: block; }
  .dropdown li a { color: rgba(255,255,255,.7); padding: 10px 36px; font-size: .9rem; gap: 0; }
  .dropdown li a:hover { background: rgba(255,255,255,.07); color: #fff; padding-left: 40px; }

  .nav-login-mobile { display: block; padding: 20px 20px 0; }
  .nav-login-mobile .btn-line-login img { height: 44px; width: auto; }

  .banner-prev, .banner-next { font-size: 1.3rem; padding: 7px 11px; }

  .dual-panel { padding: 16px; }
  .panel-toolbar { flex-direction: column; align-items: flex-start; }
  .card-grid { grid-template-columns: 1fr; }

  .footer-links { grid-template-columns: 1fr 1fr; gap: 16px; }

  body.nav-open::after {
    content: ''; position: fixed; inset: 0;
    background: rgba(0,0,0,.5); z-index: 98;
  }
}

@media (max-width: 480px) {
  .dual-tab { padding: 14px 8px; font-size: .9rem; }
  .dual-tab-icon { font-size: 1.1rem; }
  .footer-links { grid-template-columns: 1fr; }
  .tab-btn { padding: 5px 12px; font-size: .8rem; }
}