/* ==========================================================================
   福利多 Fulido — Design Tokens
   ========================================================================== */
:root {
  /* 主色板 —— 來源色卡，不可更動 */
  --c-magenta: #894D5B;
  --c-pink:    #E1B1C1;
  --c-blue:    #C4E9F8;
  --c-green:   #88A82A;
  --c-moss:    #21510A;

  /* 中性色 */
  --c-ink:   #1A1614;
  --c-body:  #5C5450;
  --c-line:  #E7E2DE;
  --c-bg:    #FBF9F7;
  --c-white: #FFFFFF;

  /* 字體 */
  --font-display: "Sora", "Noto Sans TC", sans-serif;
  --font-body:    "Noto Sans TC", system-ui, sans-serif;
  --font-mono:    "IBM Plex Mono", monospace;

  /* 字級 */
  --fs-display: clamp(2.5rem, 5.2vw, 4.25rem);
  --fs-h2:      clamp(1.75rem, 3vw, 2.5rem);
  --fs-h3:      1.25rem;
  --fs-body:    1.0625rem;
  --fs-small:   0.9375rem;
  --fs-label:   0.8125rem;

  /* 間距 */
  --sp-1: 8px;
  --sp-2: 16px;
  --sp-3: 24px;
  --sp-4: 40px;
  --sp-5: 64px;
  --sp-6: 96px;
  --sp-7: 140px;

  /* 圓角 / 陰影 */
  --r-pill: 999px;
  --r-card: 28px;
  --r-photo: 88px;

  --shadow-soft: 0 18px 40px -24px rgba(26, 22, 20, .28);
  --shadow-lift: 0 28px 56px -28px rgba(137, 77, 91, .35);

  --content-max: 1200px;
  --pad-x: 40px;
  --section-gap: var(--sp-7);
}

@media (max-width: 991px) {
  :root { --section-gap: var(--sp-6); }
}

@media (max-width: 767px) {
  :root {
    --pad-x: 20px;
    --section-gap: var(--sp-5);
    --r-photo: 48px;
  }
}

/* ==========================================================================
   Reset
   ========================================================================== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--c-bg);
  color: var(--c-ink);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { margin: 0; padding: 0; list-style: none; }
button { font: inherit; cursor: pointer; }
input { font: inherit; }
h1, h2, h3, p { margin: 0; }

h1, h2, h3 {
  font-family: var(--font-display);
  color: var(--c-ink);
  letter-spacing: -0.01em;
}

.container {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--pad-x);
}

section { padding: var(--section-gap) 0; }

.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-magenta);
}

/* Focus visibility */
a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 2px solid var(--c-magenta);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-1);
  height: 56px;
  padding: 0 32px;
  border-radius: var(--r-pill);
  font-weight: 600;
  white-space: nowrap;
  transition: transform 180ms ease, filter 180ms ease, background 180ms ease;
  border: none;
}
.btn-primary {
  background: var(--c-magenta);
  color: var(--c-white);
}
.btn-primary:hover { filter: brightness(1.08); transform: translateY(-2px); }
.btn-secondary {
  background: transparent;
  border: 1.5px solid var(--c-magenta);
  color: var(--c-magenta);
}
.btn-secondary:hover { background: var(--c-magenta); color: var(--c-white); }
.btn-on-moss {
  background: var(--c-green);
  color: var(--c-moss);
}
.btn-on-moss:hover { filter: brightness(1.08); transform: translateY(-2px); }

/* ==========================================================================
   Header / Nav
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: 76px;
  display: flex;
  align-items: center;
  background: rgba(251, 249, 247, .82);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: border-color 180ms ease;
  border-bottom: 1px solid transparent;
}
.site-header.is-scrolled { border-bottom-color: var(--c-line); }

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--c-ink);
  display: flex;
  align-items: baseline;
  gap: 6px;
}
.logo span {
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  color: var(--c-body);
  font-weight: 500;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
}
.nav-links a {
  position: relative;
  font-size: var(--fs-small);
  color: var(--c-body);
  padding: 4px 0;
}
.nav-links a:hover { color: var(--c-ink); }
.nav-links a.active { color: var(--c-ink); font-weight: 500; }
.nav-links a.active::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -4px;
  height: 2px;
  background: var(--c-magenta);
}

.header-actions { display: flex; align-items: center; gap: var(--sp-2); }
.btn-login {
  font-size: var(--fs-small);
  font-weight: 500;
  padding: 10px 22px;
  border-radius: var(--r-pill);
  border: 1px solid var(--c-line);
  background: var(--c-white);
}
.btn-login:hover { border-color: var(--c-magenta); color: var(--c-magenta); }

.hamburger {
  display: none;
  width: 40px;
  height: 40px;
  border: none;
  background: transparent;
  align-items: center;
  justify-content: center;
}
.hamburger span,
.hamburger span::before,
.hamburger span::after {
  content: "";
  display: block;
  width: 20px;
  height: 2px;
  background: var(--c-ink);
  position: relative;
  transition: transform 180ms ease, opacity 180ms ease;
}
.hamburger span::before { position: absolute; top: -6px; }
.hamburger span::after { position: absolute; top: 6px; }

.mobile-panel {
  position: fixed;
  inset: 0;
  background: var(--c-bg);
  z-index: 200;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--sp-3);
  transform: translateY(-100%);
  transition: transform 220ms ease;
}
.mobile-panel.is-open { transform: translateY(0); }
.mobile-panel a {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 600;
}
.mobile-panel .btn { margin-top: var(--sp-2); }
.mobile-close {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 44px;
  height: 44px;
  border: none;
  background: var(--c-white);
  border-radius: 50%;
  box-shadow: var(--shadow-soft);
  font-size: 1.25rem;
}

/* ==========================================================================
   Hero
   ========================================================================== */
.hero {
  padding-top: var(--sp-6);
  overflow: hidden;
}
.hero .container {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
  gap: var(--sp-5);
  align-items: center;
}

.hero-copy { max-width: 560px; }
.hero-copy .eyebrow { margin-bottom: var(--sp-2); }

.hero-title {
  font-size: var(--fs-display);
  font-weight: 700;
  line-height: 1.12;
  margin-bottom: var(--sp-3);
}
.hero-title .hl { color: var(--c-green); }

.hero-sub {
  font-size: var(--fs-body);
  color: var(--c-body);
  margin-bottom: var(--sp-4);
  max-width: 46ch;
}

.hero-form {
  display: flex;
  gap: var(--sp-2);
  margin-bottom: var(--sp-5);
}
.hero-input-wrap {
  flex: 1;
  display: flex;
  align-items: center;
  gap: var(--sp-1);
  height: 56px;
  padding: 0 8px 0 20px;
  background: var(--c-white);
  border: 1px solid var(--c-line);
  border-radius: var(--r-pill);
  transition: border-color 180ms ease, box-shadow 180ms ease;
}
.hero-input-wrap:focus-within {
  border-color: var(--c-magenta);
  box-shadow: 0 0 0 3px rgba(137, 77, 91, .15);
}
.hero-input-wrap input {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  font-size: var(--fs-small);
  color: var(--c-ink);
}
.hero-input-wrap input::placeholder { color: var(--c-body); }
.hero-input-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--c-pink);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.hero-input-icon svg { width: 18px; height: 18px; stroke: var(--c-ink); }

.integrations-label {
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-body);
  margin-bottom: var(--sp-2);
  display: block;
}
.integrations-row {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  flex-wrap: wrap;
}
.integration-chip {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border: 1px solid var(--c-line);
  border-radius: var(--r-pill);
  font-size: var(--fs-label);
  color: var(--c-body);
  opacity: .55;
  transition: opacity 180ms ease;
}
.integration-chip:hover { opacity: 1; }
.integration-chip svg { width: 14px; height: 14px; stroke: var(--c-body); }

/* Hero visual grid */
.hero-visual {
  position: relative;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: var(--sp-2);
  transform: rotate(-1.5deg);
  padding: var(--sp-4) 0;
}
.photo-card {
  position: relative;
  border-radius: var(--r-photo);
  overflow: hidden;
  width: 100%;
  box-shadow: var(--shadow-soft);
}
.photo-card .ph-label {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: 0.08em;
  padding: var(--sp-2);
}
.photo-card img { width: 100%; height: 100%; object-fit: cover; }

.card-a { aspect-ratio: 3 / 5; background: var(--c-magenta); transform: translateY(0); }
.card-a .ph-label { color: var(--c-white); }
.card-b { aspect-ratio: 3 / 6; background: var(--c-blue); transform: translateY(56px); }
.card-b .ph-label { color: var(--c-ink); }
.card-c { aspect-ratio: 3 / 4.6; background: var(--c-pink); transform: translateY(-32px); }
.card-c .ph-label { color: var(--c-ink); }

.photo-icon-btn {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--c-white);
  box-shadow: var(--shadow-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  z-index: 2;
}
.photo-icon-btn svg { width: 16px; height: 16px; stroke: var(--c-ink); }

.hero-decor {
  position: absolute;
  inset: -30px;
  width: calc(100% + 60px);
  height: calc(100% + 60px);
  pointer-events: none;
}

/* ==========================================================================
   Features (3-column)
   ========================================================================== */
.features-header { max-width: 640px; margin: 0 auto var(--sp-4); text-align: center; }
.features-header h2 { font-size: var(--fs-h2); line-height: 1.25; margin-top: var(--sp-1); }
.features-header p { color: var(--c-body); margin-top: var(--sp-2); }

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-3);
}
.feature-card {
  background: var(--c-white);
  border: 1px solid var(--c-line);
  border-radius: var(--r-card);
  padding: var(--sp-4) var(--sp-3);
  transition: transform 180ms ease, box-shadow 180ms ease;
}
.feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lift); }
.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--sp-3);
}
.feature-icon svg { width: 24px; height: 24px; stroke: var(--c-moss); fill: none; stroke-width: 1.8; }
.feature-card h3 { font-size: var(--fs-h3); margin-bottom: var(--sp-1); }
.feature-card p { color: var(--c-body); font-size: var(--fs-small); margin-bottom: var(--sp-2); }
.feature-card .link { color: var(--c-magenta); font-size: var(--fs-small); font-weight: 500; }
.feature-card .link:hover { text-decoration: underline; }

/* ==========================================================================
   Grid Wall
   ========================================================================== */
.showcase-header { max-width: 640px; margin: 0 auto var(--sp-4); text-align: center; }
.showcase-header h2 { font-size: var(--fs-h2); line-height: 1.25; margin-top: var(--sp-1); }
.showcase-header p { color: var(--c-body); margin-top: var(--sp-2); }

.grid-wall {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: 150px;
  gap: var(--sp-2);
}
.gw-item {
  position: relative;
  border-radius: var(--r-card);
  overflow: hidden;
}
.gw-item .ph-label {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--sp-2);
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: 0.08em;
}
.gw-item img { width: 100%; height: 100%; object-fit: cover; }
.gw-caption {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: flex-end;
  padding: var(--sp-2);
  background: rgba(33, 81, 10, 0);
  color: var(--c-bg);
  font-weight: 600;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 220ms ease, transform 220ms ease, background 220ms ease;
}
.gw-item:hover .gw-caption,
.gw-item:focus-within .gw-caption {
  opacity: 1;
  transform: translateY(0);
  background: rgba(33, 81, 10, .85);
}

.gw-a { grid-column: 1 / 2; grid-row: 1 / 5; background: var(--c-pink); }
.gw-a .ph-label { color: var(--c-ink); }
.gw-b { grid-column: 2 / 4; grid-row: 1 / 3; background: var(--c-blue); }
.gw-b .ph-label { color: var(--c-ink); }
.gw-d { grid-column: 4 / 5; grid-row: 1 / 2; background: var(--c-green); }
.gw-d .ph-label { color: var(--c-ink); }
.gw-e { grid-column: 4 / 5; grid-row: 2 / 3; background: var(--c-magenta); }
.gw-e .ph-label { color: var(--c-white); }
.gw-c { grid-column: 2 / 3; grid-row: 3 / 5; background: var(--c-blue); }
.gw-c .ph-label { color: var(--c-ink); }
.gw-f { grid-column: 3 / 5; grid-row: 3 / 5; background: var(--c-pink); }
.gw-f .ph-label { color: var(--c-ink); }

/* ==========================================================================
   Dark CTA
   ========================================================================== */
.cta-dark {
  position: relative;
  background: var(--c-moss);
  color: var(--c-bg);
  overflow: hidden;
  text-align: center;
}
.cta-dark::before {
  content: "";
  position: absolute;
  width: 520px;
  height: 520px;
  border-radius: 50%;
  background: var(--c-pink);
  opacity: .12;
  top: -160px;
  right: -160px;
}
.cta-dark .container { position: relative; z-index: 1; }
.cta-dark h2 {
  color: var(--c-bg);
  font-size: var(--fs-h2);
  line-height: 1.25;
  max-width: 560px;
  margin: 0 auto var(--sp-1);
}
.cta-dark p { color: var(--c-bg); opacity: .8; margin-bottom: var(--sp-4); }

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background: var(--c-bg);
  border-top: 1px solid var(--c-line);
  padding: var(--sp-5) 0 var(--sp-3);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: var(--sp-4);
  margin-bottom: var(--sp-4);
}
.footer-brand .logo { margin-bottom: var(--sp-2); }
.footer-brand p { color: var(--c-body); font-size: var(--fs-small); max-width: 32ch; }
.footer-col h3 {
  font-size: var(--fs-label);
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-body);
  margin-bottom: var(--sp-2);
}
.footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-col a { font-size: var(--fs-small); color: var(--c-ink); }
.footer-col a:hover { color: var(--c-magenta); }
.footer-bottom {
  border-top: 1px solid var(--c-line);
  padding-top: var(--sp-3);
  font-size: var(--fs-label);
  color: var(--c-body);
}

/* ==========================================================================
   Scroll reveal
   ========================================================================== */
[data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 600ms ease, transform 600ms ease;
}
[data-reveal].in-view { opacity: 1; transform: translateY(0); }

.hero-copy[data-reveal-init] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 500ms ease, transform 500ms ease;
}
.hero-copy.is-loaded { opacity: 1; transform: translateY(0); }

.photo-card[data-stagger] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 500ms ease, transform 500ms ease;
}
.photo-card[data-stagger].is-loaded { opacity: 1; }
.card-a.is-loaded { transform: translateY(0); }
.card-b.is-loaded { transform: translateY(56px); }
.card-c.is-loaded { transform: translateY(-32px); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
}

/* ==========================================================================
   RWD
   ========================================================================== */
@media (max-width: 1199px) {
  .card-b { transform: translateY(32px); }
  .card-b.is-loaded { transform: translateY(32px); }
  .card-c { transform: translateY(-16px); }
  .card-c.is-loaded { transform: translateY(-16px); }
}

@media (max-width: 991px) {
  .hero .container { grid-template-columns: 1fr; }
  .hero-visual { margin-top: var(--sp-4); }
  .card-a, .card-a.is-loaded { transform: translateY(0); }
  .card-b, .card-b.is-loaded { transform: translateY(0); }
  .card-c, .card-c.is-loaded { transform: translateY(0); }
  .card-a, .card-b, .card-c { aspect-ratio: 3 / 4; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 767px) {
  .nav-links, .header-actions .btn-login { display: none; }
  .hamburger { display: flex; }
  .hero-form { flex-direction: column; }
  .hero-form .btn { width: 100%; }
  .hero-input-wrap { width: 100%; }
  .hero-visual { flex-direction: column; align-items: stretch; transform: none; }
  .card-a, .card-b, .card-c { aspect-ratio: 4 / 3; transform: none !important; }
  .features-grid { grid-template-columns: 1fr; }
  .grid-wall { grid-template-columns: 1fr; grid-auto-rows: auto; }
  .gw-a, .gw-b, .gw-c, .gw-d, .gw-e, .gw-f {
    grid-column: 1 / 2;
    grid-row: auto;
    aspect-ratio: 4 / 3;
  }
  .footer-grid { grid-template-columns: 1fr; gap: var(--sp-3); }
  .integrations-row { flex-wrap: nowrap; overflow-x: auto; scrollbar-width: none; padding-bottom: 4px; }
  .integrations-row::-webkit-scrollbar { display: none; }
  .integration-chip { flex-shrink: 0; }
}