/* ===================================================================
   AI 影音接案助理網站 - 樣式表
   風格：深色影視工作室風，主色為暖金色，強調簡潔與現代感
   =================================================================== */

/* ---------- 變數，之後想換配色只要改這裡 ---------- */
:root {
  --color-bg: #0d0d0f;
  --color-bg-alt: #141417;
  --color-card: #1b1b1f;
  --color-border: #2a2a30;
  --color-text: #f2f2f0;
  --color-text-muted: #a3a3ad;
  --color-accent: #e8b04b;
  --color-accent-dark: #c8912f;

  --max-width: 1140px;
  --radius: 12px;
  --transition: 0.25s ease;
}

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

/* 確保 hidden 屬性一定生效，不會被 .btn 等元件自訂的 display 蓋掉 */
[hidden] {
  display: none !important;
}

html {
  scroll-behavior: smooth; /* 讓導覽列錨點點擊時平滑捲動 */
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
}

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

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

ul {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

/* ---------- 共用區塊樣式 ---------- */
.section {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 80px 24px;
}

.section-title {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  text-align: center;
  margin-bottom: 8px;
}

.section-subtitle {
  text-align: center;
  color: var(--color-text-muted);
  margin-bottom: 48px;
}

.card-grid {
  display: grid;
  gap: 24px;
}

/* ---------- 按鈕 ---------- */
.btn {
  display: inline-block;
  padding: 14px 32px;
  border-radius: 999px;
  font-weight: 600;
  transition: transform var(--transition), background var(--transition), color var(--transition);
}

.btn-primary {
  background: var(--color-accent);
  color: #1a1305;
}

.btn-primary:hover {
  background: var(--color-accent-dark);
}

.btn-secondary {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* ---------- 導覽列 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(13, 13, 15, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.navbar {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-links a {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  transition: color var(--transition);
}

.nav-links a:hover {
  color: var(--color-accent);
}

.nav-cta {
  background: var(--color-accent);
  color: #1a1305 !important;
  padding: 8px 18px;
  border-radius: 999px;
}

.nav-cta:hover {
  background: var(--color-accent-dark);
  color: #1a1305 !important;
}

/* 漢堡選單按鈕，預設在桌面版隱藏 */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 28px;
}

.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

/* ---------- Hero ---------- */
.hero {
  min-height: 78vh;
  display: flex;
  align-items: center;
  padding: 80px 24px;
  background:
    radial-gradient(circle at 50% 20%, rgba(232, 176, 75, 0.12), transparent 60%),
    var(--color-bg);
  overflow: hidden;
}

.hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 56px;
}

.hero-content {
  flex: 1;
  min-width: 0;
  text-align: left;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.4rem);
  font-weight: 800;
  margin-bottom: 20px;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--color-text-muted);
  margin-bottom: 36px;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  justify-content: flex-start;
  flex-wrap: wrap;
}

.hero-showcase {
  flex: 1;
  position: relative;
  aspect-ratio: 4 / 5;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--color-card);
  border: 1px solid var(--color-border);
}

.hero-showcase-slide {
  position: absolute;
  inset: 0;
}

.hero-showcase-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-showcase-label {
  position: absolute;
  left: 16px;
  bottom: 16px;
  padding: 8px 16px;
  border-radius: 999px;
  background: rgba(13, 13, 15, 0.75);
  color: var(--color-accent);
  font-weight: 600;
  font-size: 0.85rem;
}

/* ---------- 服務卡片 ---------- */
.services-grid {
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
}

.service-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px 24px;
  transition: border-color var(--transition), transform var(--transition);
}

.service-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-4px);
}

.service-icon {
  font-size: 2rem;
  margin-bottom: 16px;
}

.service-card h3 {
  margin-bottom: 10px;
  font-size: 1.1rem;
}

.service-card p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.service-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.service-tag {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 0.8rem;
  padding: 4px 12px;
  border-radius: 999px;
}

/* ---------- 作品集 Gallery ---------- */
.portfolio-category {
  margin-bottom: 56px;
}

.portfolio-category:last-child {
  margin-bottom: 0;
}

.portfolio-category-title {
  font-size: 1.3rem;
  margin-bottom: 4px;
}

.portfolio-category-desc {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin-bottom: 20px;
}

.portfolio-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}

.gallery-item {
  position: relative;
  display: block;
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 4 / 5;
  border: 1px solid var(--color-border);
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.gallery-item-overlay {
  position: absolute;
  inset: auto 0 0 0;
  padding: 10px 12px;
  background: linear-gradient(to top, rgba(13, 13, 15, 0.85), transparent);
  color: var(--color-text);
  font-size: 0.85rem;
  font-weight: 600;
  opacity: 0;
  transition: opacity var(--transition);
}

.gallery-item:hover {
  transform: scale(1.05);
  border-color: var(--color-accent);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.35);
}

.gallery-item:hover .gallery-item-overlay {
  opacity: 1;
}

/* ---------- 合作流程 ---------- */
.process-track {
  position: relative;
}

.process-line {
  position: absolute;
  top: 22px;
  left: 5%;
  right: 5%;
  height: 2px;
  background: var(--color-border);
}

.process-line-fill {
  position: absolute;
  inset: 0;
  width: 0%;
  background: var(--color-accent);
}

.process-steps {
  position: relative;
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 12px;
}

.process-step {
  text-align: center;
  padding: 24px 16px;
}

.step-number {
  width: 44px;
  height: 44px;
  line-height: 44px;
  margin: 0 auto 16px;
  border-radius: 50%;
  background: var(--color-accent);
  color: #1a1305;
  font-weight: 700;
}

.process-step h3 {
  font-size: 1.05rem;
  margin-bottom: 8px;
}

.process-step p {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

/* ---------- AI 助理精靈 ---------- */
.wizard-window {
  max-width: 640px;
  margin: 0 auto;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px;
  position: relative;
  min-height: 280px;
}

.wizard-back {
  position: absolute;
  top: 32px;
  left: 32px;
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

.wizard-back:hover {
  color: var(--color-accent);
}

.wizard-progress {
  text-align: right;
  color: var(--color-text-muted);
  font-size: 0.85rem;
  margin-bottom: 20px;
}

.wizard-question {
  font-size: 1.15rem;
  margin-bottom: 20px;
}

.wizard-options {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.wizard-option {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  padding: 12px 22px;
  border-radius: 999px;
  font-size: 0.95rem;
  transition: border-color var(--transition), color var(--transition);
}

.wizard-option:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.wizard-other-input {
  display: flex;
  gap: 12px;
  margin-top: 16px;
}

.wizard-other-input input {
  flex: 1;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 12px 18px;
  color: var(--color-text);
  font-size: 0.95rem;
}

.wizard-other-input input:focus {
  outline: none;
  border-color: var(--color-accent);
}

.wizard-summary-list {
  list-style: none;
  margin-bottom: 24px;
}

.wizard-summary-list li {
  padding: 10px 0;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-muted);
}

.wizard-summary-list li span {
  color: var(--color-text);
  font-weight: 600;
}

.wizard-thanks {
  margin-top: 16px;
  color: var(--color-accent);
  font-weight: 600;
}

/* ---------- FAQ ---------- */
.faq-list {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 22px;
  font-size: 1rem;
  font-weight: 600;
  text-align: left;
}

.faq-icon {
  color: var(--color-accent);
  font-size: 1.3rem;
}

.faq-answer {
  height: 0;
  overflow: hidden;
}

.faq-answer p {
  padding: 0 22px 18px;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

/* ---------- 聯絡 CTA ---------- */
.contact-cta {
  text-align: center;
  padding: 100px 24px 120px;
  background:
    radial-gradient(circle at 50% 30%, rgba(232, 176, 75, 0.22), transparent 65%),
    var(--color-bg);
}

.contact-cta h2 {
  font-size: clamp(1.5rem, 3.5vw, 2.2rem);
  margin-bottom: 32px;
}

/* ---------- Footer ---------- */
.site-footer {
  text-align: center;
  padding: 32px 24px;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

/* ===================================================================
   RWD：手機版（螢幕寬度 <= 768px）
   =================================================================== */
@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg-alt);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition);
  }

  /* JS 會替 .nav-links 加上 .open 來展開手機選單 */
  .nav-links.open {
    max-height: 400px;
  }

  .nav-links li {
    width: 100%;
  }

  .nav-links a {
    display: block;
    padding: 14px 24px;
    width: 100%;
  }

  /* 用更高的選擇器優先權蓋掉 .nav-links a 的 width:100%，避免加上 margin 後超出螢幕 */
  .nav-links a.nav-cta {
    width: calc(100% - 48px);
    margin: 8px 24px;
    display: inline-block;
    text-align: center;
  }

  .process-line {
    top: 0;
    bottom: 0;
    left: 21px;
    right: auto;
    width: 2px;
    height: auto;
  }

  .process-line-fill {
    width: 100%;
    height: 0%;
  }

  .process-steps {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .process-step {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    text-align: left;
  }

  .step-number {
    flex-shrink: 0;
    margin: 0;
  }

  .section {
    padding: 56px 20px;
  }

  .hero-inner {
    flex-direction: column;
  }

  .hero-content {
    text-align: center;
  }

  .hero-buttons {
    justify-content: center;
  }

  .hero-showcase {
    width: 100%;
  }
}