* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
/* 導覽列 */

/* ====== Theme (dark-first) ====== */
:root {
  --bg: #010243; /* 深藍底 */
  --surface: #010243; /* 表面 */
  --text: #e6e8ec; /* 主要字色 */
  --text-dim: #98a2b3; /* 次要字色 */
  --accent: #1597fb; /* 強調色 */
  --accent-600: #40ffce; /* hover */
  --border: #1f2a44; /* 邊界/分隔 */
  --shadow: 0 10px 20px rgba(0, 0, 0, 0.35);
  --radius: 12px;
  --h: 64px; /* 導覽列高度 */
}

html,
body {
  height: 100%;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", "Noto Sans TC", Arial;
  line-height: 1.4;
}
.wrapper {
  max-width: 1200px;
  margin: 0 auto;
}

/* ====== Header / Navbar ====== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: linear-gradient(0deg, var(--surface), var(--surface));
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow);
  height: var(--h);
  display: flex;
  align-items: center;
}

/* 滿版容器（左右留內距即可） */
.container {
  width: 100%;
  padding: 0 40px; /* 想更貼邊就改小 */
  display: flex;
  justify-content: space-between; /* 左 / 右兩區 */
  align-items: center;
  gap: 32px;
  box-sizing: border-box;
}

/* 左邊：Logo + 主選單 */
.nav-left {
  display: flex;
  align-items: center;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
  font-weight: 700;
  letter-spacing: 0.3px;
}
.brand-badge {
  width: 48px;
  height: 48px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  color: #001018;
  font-size: 18px;
  font-weight: 900;
}

nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  align-items: center;
  gap: 24px;
}
nav a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  padding: 8px 0;
  border-bottom: 2px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}
nav a:hover,
nav a:focus-visible {
  color: var(--text);
  border-bottom-color: var(--accent);
  outline: none;
}

/* 右邊：搜尋 + 登入 + 註冊 */
.nav-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.search {
  position: relative;
  width: 280px;
}
.search .icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  pointer-events: none;
  opacity: 0.9;
  color: var(--text-dim);
}
.search input {
  width: 100%;
  height: 40px;
  padding: 0 14px 0 40px; /* 留圖示空間 */
  background: #0c1322;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  box-sizing: border-box;
}
.search input::placeholder {
  color: #7b8794;
}
.search input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(21, 151, 251, 0.2);
}

.link {
  color: var(--text-dim);
  text-decoration: none;
  font-weight: 600;
  padding: 8px 10px;
  border-radius: 8px;
  transition: background 0.2s ease, color 0.2s ease;
}
.link:hover,
.link:focus-visible {
  color: var(--text);
  background: #0c1322;
  outline: none;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 40px;
  padding: 0 14px;
  border-radius: var(--radius);
  color: #001018;
  background: var(--accent);
  font-weight: 800;
  letter-spacing: 0.01em;
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform 0.05s ease, background 0.2s ease, box-shadow 0.2s ease;
}
.btn:hover,
.btn:focus-visible {
  background: var(--accent-600);
  outline: none;
  box-shadow: 0 0 0 3px rgba(21, 151, 251, 0.2);
}
.btn:active {
  transform: translateY(1px);
}

.landingAnimation {
  background-color: #010243;
  height: calc(100vh - 64px);
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.landingAnimation h1 {
  font-size: 3rem;
  color: white;
  margin-bottom: 16px;
  font-weight: 700;
  line-height: 1.2;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}

.landingAnimation h2 {
  font-size: 2rem;
  color: white;
  font-weight: 500;
  line-height: 1.3;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}
.landingAnimation h3 {
  color: white;
  font-size: 8rem;
  line-height: 0.7;
}

.landingAnimation h4 {
  color: white;
  font-size: 6rem;
  line-height: 0.7;
}

.landingAnimation h5 {
  color: white;
  font-size: 4rem;
  line-height: 0.7;
}
/* 新的一行排版 */
/* 跑道固定在最底，讓球和文字共用同一條 baseline */
.tech-track {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 0 12px;
  height: clamp(80px, 12vw, 140px);
}
.tech-row {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  align-items: flex-end; /* 讓三個字底線對齊 */
  gap: clamp(0, 2vw, 32px); /* 區塊間距隨螢幕變化 */
  padding: 0 12px;
  white-space: nowrap; /* 不換行，保持一路向右 */
}

/* 三個字的尺寸用 clamp：最小 / 隨視窗 / 最大 */
.tech-row .t1 {
  font-size: clamp(2rem, 12vw, 8rem);
  line-height: 0.85;
}
.tech-row .t2 {
  font-size: clamp(1.6rem, 9vw, 6rem);
  line-height: 0.85;
}
.tech-row .t3 {
  font-size: clamp(1.4rem, 6vw, 4rem);
  line-height: 0.85;
}

.gradient-ball {
  position: absolute;
  left: 0;
  bottom: 0;
  width: clamp(60px, 10vw, 120px); /* 最小 60px、最大 120px、平常隨視窗 */
  height: clamp(60px, 10vw, 120px);
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, #40ffce, #1597fb 80%);
  box-shadow: 0 4px 16px 0 rgba(21, 151, 251, 0.2);
  animation: rollOutRight 3s ease-in forwards;
  animation-delay: 4s;
  mix-blend-mode: screen; /* 讓亮球光穿透文字 */
}

@keyframes rollOutRight {
  0% {
    transform: translateX(0) rotate(0deg);
  }
  100% {
    transform: translateX(calc(120vw - clamp(60px, 10vw, 120px)))
      rotate(1440deg);
  }
}

/* 主內容區 */
.two-cycle-section {
  background-color: #fff !important; /* 白底 */
  color: #000; /* 文字改黑，避免看起來像沒底 */
  position: relative; /* 讓 z-index 生效 */
  z-index: 1;
  width: 100%;
}
/*視差滾動區*/
.parallax {
  position: relative;
  min-height: 100vh; /* 改為 100vh 更容易看到效果 */
  overflow: hidden;
  background-color: #001233;
  width: 100%;
}

.parallax-container {
  position: relative;
  width: 100%;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

/* 視差滾動背景圖 */
.parallax-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 200%;
  height: 200%;
  background-image: url("../img/parallax.png");

  /* 關鍵屬性：創造視差固定效果 */
  background-attachment: fixed;
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;

  z-index: 1;
}

/* 前景內容 */
.parallax-content {
  position: relative;
  z-index: 10;
  text-align: center;
  color: white;
  padding: 20px;
  max-width: 800px;
}

.parallax-content h2 {
  font-size: 3rem;
  margin-bottom: 20px;
  text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.7);
  font-weight: bold;
}

.parallax-content p {
  font-size: 1.3rem;
  margin-bottom: 30px;
  text-shadow: 1px 1px 4px rgba(0, 0, 0, 0.7);
  line-height: 1.6;
}

/* 上下左右置中的按鈕 */
.center-button {
  /* 按鈕樣式 */
  padding: 15px 40px;
  font-size: 1.1rem;
  font-weight: 600;

  /* 使用你的品牌色漸層 */
  background: linear-gradient(135deg, #1597fb, #40ffce);
  color: white;

  border: none;
  border-radius: 8px;
  cursor: pointer;

  /* 陰影效果 */
  box-shadow: 0 4px 15px rgba(21, 151, 251, 0.4);

  /* 轉場效果 */
  transition: all 0.3s ease;

  /* 自動水平置中（因為父元素有 text-align: center） */
  display: inline-block;
}

.center-button:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 25px rgba(64, 255, 206, 0.6);
  background: linear-gradient(135deg, #40ffce, #1597fb);
}

.center-button:active {
  transform: translateY(-1px);
  box-shadow: 0 3px 15px rgba(21, 151, 251, 0.5);
}

/* 額外的內容區塊（用來測試視差效果） */
.content-section {
  padding: 100px 20px;
  background-color: white;
  text-align: center;
  min-height: 50vh;
}

.content-wrapper {
  max-width: 1200px;
  margin: 0 auto;
}

.content-section h2 {
  font-size: 2.5rem;
  color: #001233;
  margin-bottom: 20px;
}

.content-section p {
  font-size: 1.2rem;
  color: #666;
  line-height: 1.8;
}

/* 熱門課程區 */
.hot-courses {
  padding: 80px 0;
  background-color: #23272f;
}

.section-title {
  font-size: 2.5rem;
  color: white;
  text-align: center;
  margin-bottom: 48px;
  font-weight: bold;
}

/* Swiper 容器 */
.swiper-container {
  position: relative;
  padding: 0 60px; /* 給左右箭頭留空間 */
}

.swiper {
  overflow: hidden;
  padding: 20px 0; /* 給陰影留空間 */
}

.swiper-wrapper {
  display: flex;
}

.swiper-slide {
  width: auto;
  height: auto;
}

/* 課程卡片 */
.course-card {
  background: #2a2f42;
  border-radius: 16px;
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  cursor: pointer;
  width: 320px; /* 固定寬度 */
}

.course-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 24px rgba(21, 151, 251, 0.3);
}

/* 課程圖片 */
.course-image {
  width: 100%;
  height: 200px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  overflow: hidden;
  position: relative;
}

.course-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.course-card:hover .course-image img {
  transform: scale(1.1);
}

/* 課程資訊 */
.course-info {
  padding: 20px;
}

.course-info h3 {
  font-size: 1.25rem;
  color: white;
  margin-bottom: 8px;
  font-weight: 600;
}

.course-desc {
  font-size: 0.9rem;
  color: #a0a8c1;
  margin-bottom: 16px;
  line-height: 1.5;
}

.course-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.price {
  font-size: 1.125rem;
  color: #40ffce;
  font-weight: bold;
}

.students {
  font-size: 0.875rem;
  color: #a0a8c1;
}

/* 左右箭頭 */
.swiper-button-prev,
.swiper-button-next {
  width: 48px;
  height: 48px;
  background: rgba(21, 151, 251, 0.2);
  border-radius: 50%;
  position: absolute;
  transform: translateY(0);
  cursor: pointer;
  z-index: 10;
  color: white;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
}

.swiper-button-prev:hover,
.swiper-button-next:hover {
  background: rgba(21, 151, 251, 0.4);
  transform: scale(1.1); /* 移除 translateY(-50%) */
}

.swiper-button-prev {
  left: calc(50% - 60px); /* 左箭頭位於中心左側 */
}

.swiper-button-next {
  right: calc(50% - 60px); /* 右箭頭位於中心右側 */
}

/* 禁用狀態 */
.swiper-button-disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.swiper-button-disabled:hover {
  transform: translateY(-50%) scale(1);
  background: rgba(21, 151, 251, 0.2);
}

/* footer*/
.site-footer {
  background: #f4f4f4;
  color: #000;
  padding: 64px 80px 24px;
  font-family: "Noto Sans TC", sans-serif;
}

/* 主區塊排版 */
.footer-container {
  display: grid;
  grid-template-columns: 1.5fr repeat(4, 1fr);
  gap: 40px;
  margin-bottom: 40px;
  align-items: flex-start;
}

/* Logo 區 */
.footer-logo img {
  width: 180px;
  margin-bottom: 12px;
}
.footer-logo p {
  color: #666;
  font-size: 0.9rem;
  line-height: 1.5;
}

/* 一般欄位 */
.footer-col h4 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 20px;
}

.footer-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-col li {
  margin-bottom: 10px;
}

.footer-col a {
  text-decoration: none;
  color: #333;
  font-size: 0.95rem;
  transition: color 0.2s ease;
}
.footer-col a:hover {
  color: var(--accent);
}

/* 社群按鈕 */
.social-icons {
  display: flex;
  gap: 12px;
  margin-bottom: 20px;
}
.social-icons a {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: white;
  color: #333;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  box-shadow: 0 0 4px rgba(0, 0, 0, 0.15);
  transition: all 0.2s ease;
}
.social-icons a:hover {
  color: white;
  background: var(--accent);
  transform: translateY(-2px);
}

/* 版權列 */
.footer-bottom {
  border-top: 1px solid #ddd;
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
}

.footer-bottom p {
  font-size: 0.9rem;
  color: #666;
  margin: 8px 0 0;
}

/* 互動範例頁 */
.section-html {
  margin: 32px auto;
  padding: 48px 32px;
  max-width: 800px;

  background-color: #fffbea; /* 淡黃色，適合代表 HTML 的基礎性 */
  border: 1px solid #f5c518;
  border-radius: 8px;

  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.08);
  font-family: "Segoe UI", sans-serif;
  color: #333;

  transition: all 0.3s ease;
}

.section-html:hover {
  transform: scale(1.01);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.12);
}
.section-html h1 {
  margin-bottom: 32px;
  font-size: 48px;
}
.section-html p {
  margin-bottom: 32px;
  font-size: 24px;
}
.section-html a {
  display: block;
  margin-bottom: 32px;
}
.section-html img {
  margin-bottom: 32px;
}
.section-html ul {
  margin-bottom: 32px;
}
.section-html li {
  margin-bottom: 16px;
}

.section-css {
  text-align: center;
  padding: 64px 32px;
  margin: 32px auto;
  max-width: 800px;

  background: linear-gradient(135deg, #e3f2fd, #ffffff);
  border: 1px solid #1597fb;
  border-radius: 10px;

  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
}

.section-css:hover {
  transform: scale(1.02);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}
.section-css h2 {
  margin-bottom: 32px;
  font-size: 36px;
}
.section-js {
  margin: 32px auto;
  padding: 48px 32px;
  max-width: 800px;

  background: linear-gradient(135deg, #e0f7fa, #ffffff); /* 淡藍綠漸層 */
  border: 1px solid #00bcd4;
  border-radius: 10px;

  text-align: center;
  font-family: "Segoe UI", sans-serif;
  color: #222;

  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
}

.section-js:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.15);
}
.section-js h2 {
  margin-bottom: 32px;
  font-size: 36px;
}
.section-js button {
  background-color: #00bcd4;
  color: white;
  border: none;
  padding: 12px 24px;
  font-size: 16px;
  font-weight: 600;
  border-radius: 6px;
  cursor: pointer;
  box-shadow: 0 4px 8px rgba(0, 188, 212, 0.3);
  transition: background-color 0.3s ease, transform 0.2s ease;
}

.section-js button:hover {
  background-color: #0097a7;
  transform: scale(1.05);
}

.section-js button:active {
  transform: scale(0.98);
  box-shadow: 0 2px 4px rgba(0, 188, 212, 0.2);
}

/* 無限圖文區*/
.left-section {
  flex: 1;
}

.subtitle {
  color: #ccc; /* 調深灰色會更易讀 */
  font-size: clamp(12px, 2vw, 16px); /* 手機最小 12px，桌機最大 16px */
  margin-bottom: 10px;
  letter-spacing: 2px;
  line-height: 1.5;
}

.title {
  font-size: clamp(24px, 5vw, 48px); /* 手機 24px，中間 5vw，桌機 48px */
  font-weight: bold;
  color: #333;
  margin-bottom: 40px;
  line-height: 1.5;
}

.right-section {
  flex: 1.5;
  position: relative;
  height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.infinity-container {
  position: relative;
  width: 100%;
  height: 100%;
}

.infinity-svg {
  width: 100%;
  height: 100%;
}
/* ====== RWD ====== */
@media (max-width: 1080px) {
  nav ul {
    gap: 16px;
  }
  .search {
    width: 240px;
  }
}
.nav-right a i.bi-cart-fill {
  color: white; /* 讓購物車 icon 永遠是白色 */
}

/* 手機尺寸 (820px 以下) */
@media (max-width: 820px) {
  /*nav*/
  nav ul {
    gap: 12px;
  }
  .search {
    width: 200px;
  }

  /*開頭動畫*/
  .landingAnimation h1 {
    font-size: 2rem;
  }

  .landingAnimation h2 {
    font-size: 1.5rem;
  }

  .text-item h2 {
    font-size: 24px;
  }

  .text-item p {
    font-size: 14px;
  }

  .section-title {
    font-size: 2rem;
  }

  /*footer*/
  .footer-container {
    grid-template-columns: 1fr;
    text-align: center;
  }
}

/* 手機尺寸 (440px 以下) */
@media (max-width: 440px) {
  header {
    flex-direction: column;
    height: auto;
    padding: 12px;
  }

  /*nav*/
  nav {
    display: none;
  } /* 小螢幕先隱藏主選單 */
  .search {
    width: 100%;
  } /* 右側保留搜尋 */
  nav ul {
    flex-direction: column;
    width: 100%;
  }

  nav li {
    margin-bottom: 8px;
  }

  .landingAnimation h1 {
    font-size: 1.5rem;
  }

  .landingAnimation h2 {
    font-size: 1rem;
  }

  .content-wrapper {
    flex-direction: column;
    padding-left: 16px;
  }

  .text-item h2 {
    font-size: 20px;
  }

  .text-item p {
    font-size: 14px;
    max-width: 100%;
  }

  .section-title {
    font-size: 1.5rem;
  }

  footer {
    flex-direction: column;
    padding: 48px 24px 32px;
  }

  .socials {
    margin-left: 0;
    margin-top: 24px;
  }
}
/* === 漢堡與手機選單 === */

/* 漢堡按鈕（桌機隱藏） */
.hamburger {
  display: none;
  width: 40px;
  height: 40px;
  margin-left: auto;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: transparent;
  position: relative;
  cursor: pointer;
  transition: background 0.2s;
}
.hamburger:hover {
  background: #0c1322;
}
.hamburger span {
  position: absolute;
  left: 9px;
  right: 9px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.2s ease, top 0.25s ease;
}
.hamburger span:nth-child(1) {
  top: 12px;
}
.hamburger span:nth-child(2) {
  top: 19px;
}
.hamburger span:nth-child(3) {
  top: 26px;
}

/* 打開狀態的 X 動畫 */
.hamburger.is-open span:nth-child(1) {
  top: 19px;
  transform: rotate(45deg);
}
.hamburger.is-open span:nth-child(2) {
  opacity: 0;
}
.hamburger.is-open span:nth-child(3) {
  top: 19px;
  transform: rotate(-45deg);
}

/* 手機抽屜 */
.mobile-nav {
  position: fixed;
  top: var(--h);
  left: 0;
  right: 0;
  background: var(--surface);
  border-top: 1px solid var(--border);
  transform: translateY(-8px);
  opacity: 0;
  pointer-events: none;
  transition: transform 0.25s ease, opacity 0.25s ease;
  z-index: 40;
}
.mobile-nav.open {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}
.mobile-inner {
  padding: 16px 20px 20px;
  display: grid;
  gap: 16px;
}

/* 手機搜尋欄 */
.mobile-search {
  display: grid;
  grid-template-columns: 1fr 44px;
  gap: 8px;
}
.mobile-search input {
  height: 42px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: #0c1322;
  color: var(--text);
  padding: 0 12px;
}
.mobile-search button {
  height: 42px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: #0c1322;
  color: var(--text);
  cursor: pointer;
}

/* 手機選單連結 */
.mobile-menu ul {
  list-style: none;
  margin: 0;
  padding: 8px 0;
  display: grid;
  gap: 10px;
}
.mobile-menu a {
  display: block;
  padding: 12px 8px;
  color: var(--text);
  text-decoration: none;
  border-radius: 8px;
  background: transparent;
  transition: background 0.2s;
}
.mobile-menu a:hover {
  background: #0c1322;
}

/* 手機登入註冊 */
.mobile-actions {
  display: flex;
  gap: 10px;
}
.mobile-actions .link {
  flex: 0 0 auto;
  background: #0c1322;
  color: var(--text);
  padding: 10px 14px;
  border-radius: 8px;
  text-decoration: none;
}
.mobile-actions .btn {
  flex: 1;
  justify-content: center;
}

/* 斷點：<= 820 顯示漢堡、隱藏桌機版 nav */
@media (max-width: 820px) {
  .nav-desktop {
    display: none;
  }
  .hamburger {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }
}

/* 讓抽屜覆蓋內容（避免被 wrapper 蓋住） */
.site-header {
  z-index: 60;
}