/* ============================================
   図面加工品 見積管理システム LP
   Design: Chic / Modern / Stylish
   No emojis. Clean white base + blue accent.
   ============================================ */

/* フローティングCTA */
.floating-cta {
  position: fixed;
  bottom: 32px;
  right: 32px;
  background: linear-gradient(135deg, #2563eb, #0ea5e9);
  color: #ffffff;
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 14px 28px;
  border-radius: 100px;
  box-shadow: 0 4px 20px rgba(37, 99, 235, 0.4);
  letter-spacing: 0.05em;
  transition: opacity 0.3s, transform 0.3s;
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transform: translateY(20px);
}

.floating-cta.is-visible {
  opacity: 1;
  pointer-events: auto;
  animation: floatingBounce 3s ease-in-out infinite;
}

@keyframes floatingBounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.floating-cta:hover {
  box-shadow: 0 6px 28px rgba(37, 99, 235, 0.55);
  transform: translateY(-2px);
}

/* メディア保存防止 */
img, video {
  -webkit-user-drag: none;
  user-select: none;
  -webkit-user-select: none;
}

/* --- CSS Variables --- */
:root {
  --color-primary: #1a56db;
  --color-primary-dark: #1444b0;
  --color-primary-light: #e8effd;
  --color-accent: #0f172a;
  --color-bg: #ffffff;
  --color-bg-alt: #f8fafc;
  --color-bg-dark: #0f172a;
  --color-text: #1e293b;
  --color-text-light: #64748b;
  --color-text-inverse: #ffffff;
  --color-border: #e2e8f0;
  --color-border-light: #f1f5f9;
  --font-family: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --max-width: 1280px;
  --header-height: 72px;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
  overflow-x: hidden;
}

body {
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  word-break: keep-all;
  overflow-wrap: break-word;
  overflow-x: hidden;
}

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

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}

ul {
  list-style: none;
}

/* --- Utility --- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 48px;
  overflow: hidden;
}

.sp-only {
  display: none;
}

/* --- Section Title --- */
.section-title {
  font-size: 2.25rem;
  font-weight: 700;
  text-align: center;
  line-height: 1.5;
  letter-spacing: -0.02em;
  color: var(--color-text);
  margin-bottom: 20px;
}

.section-lead {
  text-align: center;
  color: var(--color-text-light);
  font-size: 1.05rem;
  line-height: 1.9;
  margin-bottom: 56px;
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-family);
  font-weight: 700;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  border-radius: var(--radius-sm);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.btn--primary {
  background: linear-gradient(135deg, #1a56db, #3b82f6);
  color: #ffffff;
  border: none;
  box-shadow: 0 4px 16px rgba(26, 86, 219, 0.3);
  transition: all 0.4s ease;
}

.btn--primary:hover {
  background: linear-gradient(135deg, #1542b0, #2563eb);
  transform: translateY(-3px);
  box-shadow: 0 8px 28px rgba(26, 86, 219, 0.45), 0 0 20px rgba(59, 130, 246, 0.2);
}

.btn--primary:active {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(26, 86, 219, 0.3);
}

.btn--lg {
  font-size: 1.1rem;
  padding: 20px 52px;
  border-radius: 100px;
  gap: 8px;
}

/* --- Fade In Animation --- */
.fade-in {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.fade-in.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Placeholder Images --- */
.placeholder-image {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.placeholder-image__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  color: var(--color-text-light);
}

.placeholder-image__inner p {
  font-size: 0.85rem;
}

.placeholder-image--hero {
  width: 100%;
  aspect-ratio: 4 / 3;
}

.placeholder-image--overview {
  width: 100%;
  aspect-ratio: 16 / 10;
}

.placeholder-image--step {
  width: 100%;
  aspect-ratio: 16 / 9;
}

.placeholder-image--merit {
  width: 100%;
  aspect-ratio: 4 / 3;
}

.placeholder-image--security {
  max-width: 800px;
  width: 100%;
  margin: 0 auto;
  aspect-ratio: 16 / 8;
}

/* ============================================
   Header
   ============================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: #ffffff;
  border-bottom: 1px solid transparent;
  transition: var(--transition);
}

.header.is-scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

.header__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 48px;
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header__logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.header__logo-img {
  height: 54px;
  width: auto;
}

.header__nav {
  flex: 1;
  display: flex;
  justify-content: center;
}

.header__nav-list {
  display: flex;
  gap: 36px;
}

.header__nav-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-light);
  position: relative;
  white-space: nowrap;
}

.header__nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: var(--transition);
}

.header__nav-link:hover {
  color: var(--color-text);
}

.header__nav-link:hover::after {
  width: 100%;
}

.header__cta-btn {
  display: inline-flex;
  align-items: center;
  padding: 10px 28px;
  background: linear-gradient(135deg, #1a56db 0%, #3b82f6 50%, #1a56db 100%);
  background-size: 200% 200%;
  color: var(--color-text-inverse);
  font-size: 0.875rem;
  font-weight: 700;
  border-radius: 100px;
  white-space: nowrap;
  flex-shrink: 0;
  box-shadow: 0 3px 12px rgba(26, 86, 219, 0.3), 0 0 0 0 rgba(59, 130, 246, 0);
  transition: var(--transition);
}


.header__cta-btn:hover {
  background-position: 100% 100%;
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(26, 86, 219, 0.45), 0 0 16px rgba(59, 130, 246, 0.2);
}

.header__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.header__hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  transition: var(--transition);
}

/* ============================================
   Hero
   ============================================ */
.hero {
  position: relative;
  padding-top: calc(var(--header-height) + 96px);
  padding-bottom: 120px;
  overflow: hidden;
}

.hero__video {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: blur(2px);
  transform: scale(1.03);
}

.hero__overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6);
}

.hero__inner {
  position: relative;
  z-index: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 48px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.hero__label {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-primary);
  background: var(--color-primary-light);
  padding: 6px 16px;
  border-radius: 100px;
  margin-bottom: 28px;
  letter-spacing: 0.04em;
}

.hero__title {
  font-size: 2.75rem;
  font-weight: 900;
  line-height: 1.5;
  letter-spacing: -0.02em;
  color: #ffffff;
  margin-bottom: 28px;
}

.hero__accent {
  color: #6ea8fe;
  font-size: 1.15em;
  position: relative;
  top: 3px;
}

.hero__subtitle {
  font-size: 1.15rem;
  color: rgba(255, 255, 255, 0.9);
  font-weight: 500;
  line-height: 2;
  margin-bottom: 44px;
}

.hero__actions {
  margin-bottom: 52px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero__free-note {
  margin-top: 16px;
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.7);
  font-weight: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.hero__free-badge {
  display: inline-block;
  background: rgba(255, 255, 255, 0.2);
  color: #ffffff;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 4px 14px;
  border: 1px solid rgba(255, 255, 255, 0.4);
  border-radius: 4px;
  letter-spacing: 0.06em;
  flex-shrink: 0;
}

.hero__badges {
  display: flex;
  gap: 28px;
  flex-wrap: wrap;
}

.hero__badge {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-light);
  white-space: nowrap;
}

.hero__badge-icon {
  display: flex;
  align-items: center;
  color: var(--color-primary);
}

.hero__image-wrapper {
  position: relative;
}

/* ============================================
   Pain Points
   ============================================ */
.pain {
  padding: 120px 0;
  background: var(--color-bg);
}

.pain__grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 28px;
  margin-top: 64px;
  align-items: stretch;
  max-width: 100%;
  padding-top: 4px;
}

.pain__card {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0;
  text-align: center;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  min-width: 0;
  overflow: hidden;
}

.pain__card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.pain__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  min-width: 64px;
  min-height: 64px;
  margin-bottom: 20px;
  background: var(--color-primary-light);
  border-radius: 50%;
  color: var(--color-primary);
}

.pain__image {
  width: 100%;
}

.pain__image img {
  width: 100%;
  height: auto;
  display: block;
}

.pain__text {
  font-size: 0.95rem;
  font-weight: 500;
  line-height: 1.8;
  color: var(--color-text);
  flex: 1;
  display: flex;
  align-items: center;
  word-break: break-all;
  overflow-wrap: break-word;
  width: 100%;
  padding: 24px 20px;
}

.pain__solution {
  text-align: center;
  margin-top: 72px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.pain__arrow {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin-bottom: 28px;
  gap: 6px;
}

.pain__chevron {
  display: block;
  width: 28px;
  height: 28px;
  border-right: 3px solid var(--color-primary);
  border-bottom: 3px solid var(--color-primary);
  transform: rotate(45deg);
  opacity: 0;
  animation: chevronFade 2s infinite;
}

.pain__chevron--1 { animation-delay: 0s; }
.pain__chevron--2 { animation-delay: 0.3s; }
.pain__chevron--3 { animation-delay: 0.6s; }

@keyframes chevronFade {
  0%   { opacity: 0; transform: rotate(45deg) translateY(-4px); }
  30%  { opacity: 1; transform: rotate(45deg) translateY(0); }
  60%  { opacity: 1; transform: rotate(45deg) translateY(0); }
  100% { opacity: 0; transform: rotate(45deg) translateY(4px); }
}

.pain__solution-text {
  font-size: 1.5rem;
  color: var(--color-text-inverse);
  font-weight: 700;
  letter-spacing: -0.01em;
  padding: 24px 48px;
  border-radius: 100px;
  margin-top: 16px;
  text-decoration: none;
  display: inline-block;
}

.pain__solution-text strong {
  color: var(--color-text-inverse);
  font-weight: 900;
}

/* ============================================
   Overview
   ============================================ */
.overview {
  padding: 120px 0;
  background: var(--color-bg-alt);
}

.overview .section-title {
  margin-bottom: 60px;
}

.overview__content {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 48px;
  align-items: start;
}

.overview__visual {
  min-width: 0;
  overflow: hidden;
}

.overview__video {
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  display: block;
}

.overview__features {
  display: flex;
  flex-direction: column;
  gap: 24px;
  height: 497px;
  justify-content: space-between;
}

.overview__feature {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  transition: var(--transition);
}

.overview__feature:hover {
  box-shadow: var(--shadow-md);
}

.overview__feature-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
  color: var(--color-primary);
}

.overview__feature-header h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-text);
}

.overview__feature p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* ============================================
   Steps
   ============================================ */
.steps {
  padding: 120px 0;
  background: var(--color-bg);
}

.steps__timeline {
  max-width: 960px;
  margin: 64px auto 0;
  position: relative;
}

.steps__timeline::before {
  content: '';
  position: absolute;
  left: 52px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-border);
}

.steps__item {
  display: grid;
  grid-template-columns: 104px 1fr;
  gap: 36px;
  margin-bottom: 15px;
  position: relative;
}

.steps__item:last-child {
  margin-bottom: 0;
}

.steps__number {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  padding-top: 4px;
  position: relative;
  z-index: 1;
}

.steps__number span {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  text-transform: uppercase;
}

.steps__number strong {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border-radius: 50%;
  font-size: 1.3rem;
  font-weight: 900;
}

.steps__body {
  background: #ffffff;
  border: none;
  border-radius: var(--radius-md);
  padding: 36px 40px;
  min-width: 0;
  overflow: hidden;
}

.steps__heading {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--color-text);
}

.steps__desc {
  font-size: 0.975rem;
  color: var(--color-text-light);
  line-height: 1.9;
  margin-bottom: 24px;
}

.steps__image {
  margin-top: 8px;
}

.steps__image img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-sm);
}

/* ============================================
   Merits
   ============================================ */
.merits {
  padding: 120px 0;
  background: var(--color-bg-alt);
}

.merits__list {
  margin-top: 72px;
  display: flex;
  flex-direction: column;
  gap: 72px;
}

.merits__item {
  display: grid;
  grid-template-columns: 80px 1fr 1fr;
  grid-template-areas: "num content visual";
  gap: 36px;
  align-items: center;
}

.merits__item--reverse {
  grid-template-areas: "num visual content";
}

.merits__num {
  grid-area: num;
}

.merits__content {
  grid-area: content;
  min-width: 0;
}

.merits__visual {
  grid-area: visual;
  min-width: 0;
}

.merits__num {
  font-size: 3.5rem;
  font-weight: 900;
  color: #a3bffa;
  line-height: 1;
  letter-spacing: -0.04em;
  text-align: center;
}

.merits__heading {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--color-text);
  line-height: 1.5;
}

.merits__desc {
  font-size: 1rem;
  color: var(--color-text-light);
  line-height: 1.9;
}

.merits__visual {
  overflow: hidden;
  border-radius: var(--radius-md);
}

.merits__image {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: var(--radius-md);
  display: block;
}

/* ============================================
   Security
   ============================================ */
.security {
  padding: 120px 0;
  background: var(--color-bg);
}

.security__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 32px;
  margin-bottom: 64px;
  align-items: stretch;
}

.security__card {
  text-align: center;
  padding: 44px 32px;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.security__card p {
  flex: 1;
}

.security__image {
  max-width: 800px;
  width: 100%;
  margin: 0 auto;
  display: block;
  border-radius: var(--radius-md);
}

.security__card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.security__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 120px;
  height: 120px;
  margin: 0 auto 20px;
  border-radius: 50%;
  overflow: hidden;
}

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

.security__icon--sm img {
  width: 90%;
  height: 90%;
  object-fit: cover;
}

.security__card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--color-text);
}

.security__card p {
  font-size: 0.95rem;
  color: var(--color-text-light);
  line-height: 1.8;
}

/* ============================================
   FAQ
   ============================================ */
.faq {
  padding: 120px 0;
  background: var(--color-bg-alt);
}

.faq__list {
  max-width: 840px;
  margin: 64px auto 0;
}

.faq__item {
  border-bottom: 1px solid var(--color-border);
}

.faq__item:first-child {
  border-top: 1px solid var(--color-border);
}

.faq__question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 28px 0;
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--font-family);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-text);
  text-align: left;
  transition: var(--transition);
}

.faq__question:hover {
  color: var(--color-primary);
}

.faq__icon {
  flex-shrink: 0;
  margin-left: 24px;
  transition: transform 0.3s ease;
  color: var(--color-text-light);
}

.faq__question[aria-expanded="true"] .faq__icon {
  transform: rotate(180deg);
}

.faq__answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.faq__answer p {
  padding-bottom: 28px;
  font-size: 0.975rem;
  color: var(--color-text-light);
  line-height: 1.9;
}

/* ============================================
   CTA
   ============================================ */
.cta {
  display: flex;
  background: #000000;
  height: 420px;
  justify-content: center;
}

.cta__video-area {
  flex: 0 1 auto;
  overflow: hidden;
  display: flex;
  position: relative;
}

.cta__video-area::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  box-shadow: inset 0 0 140px 70px #000000;
  pointer-events: none;
}

.cta__video {
  height: 100%;
  object-fit: contain;
  display: block;
  transform: scale(1.15);
  filter: brightness(0.7);
}

.cta__content {
  flex: 0 1 auto;
  display: flex;
  align-items: center;
  padding-left: 40px;
}

.cta__inner {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 48px;
}

.cta__title {
  font-size: 2.125rem;
  font-weight: 900;
  color: var(--color-text-inverse);
  line-height: 1.5;
  letter-spacing: -0.02em;
}

.cta__desc {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.9;
  max-width: 600px;
}

.cta .btn--primary {
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(8px);
  color: #ffffff;
  font-size: 0.95rem;
  padding: 14px 40px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.2);
  letter-spacing: 0.08em;
  transition: all 0.3s ease;
}

.cta .btn--primary:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.6);
  box-shadow: 0 6px 32px rgba(0, 0, 0, 0.3);
  transform: translateY(-2px);
}

.cta__note {
  margin-top: 18px;
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.6);
  font-weight: 500;
}

/* ============================================
   Footer
   ============================================ */
.footer {
  background: #000000;
  padding: 0 0 40px;
}

.footer__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 60px;
}

.footer__divider {
  border: none;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  margin: 0 0 40px;
}

.footer__columns {
  display: flex;
  gap: 80px;
  margin-bottom: 60px;
}

.footer__col {
  flex: 1;
}

.footer__col-title {
  font-size: 1rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 24px;
}

.footer__links-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 40px;
}

.footer__links {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer__links li {
  margin-bottom: 12px;
}

.footer__links a {
  color: rgba(255, 255, 255, 0.75);
  text-decoration: none;
  font-size: 0.85rem;
  transition: color 0.2s;
}

.footer__links a:hover {
  color: #ffffff;
}

.footer__bottom {
  margin-top: 40px;
}

.footer__notice {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.5);
  line-height: 1.8;
  margin-bottom: 16px;
}

.footer__copy {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.5);
}

/* ============================================
   Mobile Navigation Overlay
   ============================================ */
.header__nav.is-open {
  display: flex;
}

/* ============================================
   Responsive: Tablet
   ============================================ */
@media (max-width: 1024px) {
  .container,
  .header__inner,
  .hero__inner,
  .footer__inner {
    padding-left: 32px;
    padding-right: 32px;
  }

  .hero__title {
    font-size: 2.25rem;
  }

  .merits__item,
  .merits__item--reverse {
    grid-template-columns: 60px 1fr;
    grid-template-rows: auto auto;
  }

  .merits__visual,
  .merits__item--reverse .merits__visual {
    grid-column: 2;
    order: 0;
    max-width: 100%;
  }

  .merits__item--reverse .merits__content {
    order: 0;
  }

  .placeholder-image--merit {
    aspect-ratio: 16 / 9;
  }
}

/* ============================================
   Responsive: Mobile
   ============================================ */
@media (max-width: 768px) {
  :root {
    --header-height: 64px;
  }

  .sp-only {
    display: inline;
  }

  .container,
  .header__inner,
  .hero__inner,
  .footer__inner {
    padding-left: 20px;
    padding-right: 20px;
  }

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

  .section-lead {
    font-size: 0.95rem;
    margin-bottom: 40px;
  }

  .btn {
    white-space: normal;
  }

  .btn--lg {
    font-size: 1rem;
    padding: 16px 32px;
    width: 100%;
    max-width: 360px;
  }

  /* Header Mobile */
  .header__nav {
    display: none;
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    padding-top: 48px;
    z-index: 999;
  }

  .header__nav.is-open {
    display: flex;
  }

  .header__nav-list {
    flex-direction: column;
    gap: 0;
    width: 100%;
    text-align: center;
  }

  .header__nav-list li {
    border-bottom: 1px solid var(--color-border-light);
  }

  .header__nav-link {
    display: block;
    padding: 20px 24px;
    font-size: 1rem;
  }

  .header__nav-link::after {
    display: none;
  }

  .header__cta-btn {
    display: none;
  }

  .header__hamburger {
    display: flex;
  }

  .header__hamburger.is-active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .header__hamburger.is-active span:nth-child(2) {
    opacity: 0;
  }

  .header__hamburger.is-active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  /* Hero Mobile */
  .hero {
    padding-top: calc(var(--header-height) + 48px);
    padding-bottom: 64px;
  }

  .hero__inner {
    padding: 0 20px;
    align-items: stretch;
    text-align: center;
  }

  .hero__title {
    font-size: 1.75rem;
    word-break: normal;
  }

  .hero__subtitle {
    font-size: 0.95rem;
    word-break: normal;
  }

  .hero__badges {
    gap: 16px;
  }

  .hero__badge {
    font-size: 0.8rem;
  }

  .hero__actions {
    text-align: center;
    align-items: center;
  }

  .hero__free-note {
    flex-direction: column;
    text-align: center;
  }

  /* Pain Points Mobile */
  .pain {
    padding: 72px 0;
  }

  .pain__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
    margin-top: 40px;
  }

  .pain__card {
    padding: 28px 16px;
  }

  .pain__text {
    font-size: 0.85rem;
  }

  /* Overview Mobile */
  .overview {
    padding: 72px 0;
  }

  .overview__content {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
  }

  .overview__visual {
    width: 100%;
  }

  .overview__video {
    max-width: 100%;
  }

  .overview__features {
    height: auto;
    min-width: 0;
  }

  /* Steps Mobile */
  .steps {
    padding: 72px 0;
  }

  .steps__timeline::before {
    left: 28px;
  }

  .steps__item {
    grid-template-columns: 56px 1fr;
    gap: 16px;
    margin-bottom: 32px;
  }

  .steps__number strong {
    width: 40px;
    height: 40px;
    font-size: 1.1rem;
  }

  .steps__body {
    padding: 24px 20px;
  }

  .steps__heading {
    font-size: 1.05rem;
  }

  .steps__desc {
    max-width: none;
  }

  /* Merits Mobile */
  .merits {
    padding: 72px 0;
  }

  .merits__list {
    gap: 48px;
    margin-top: 48px;
  }

  .merits__item,
  .merits__item--reverse {
    grid-template-columns: 1fr;
    grid-template-rows: auto;
    gap: 16px;
  }

  .merits__num {
    font-size: 2.5rem;
  }

  .merits__visual,
  .merits__item--reverse .merits__visual {
    grid-column: 1;
    order: 0;
  }

  .merits__item--reverse .merits__content {
    order: 0;
  }

  .merits__heading {
    font-size: 1.1rem;
  }

  /* Security Mobile */
  .security {
    padding: 72px 0;
  }

  .security__grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
  }

  /* FAQ Mobile */
  .faq {
    padding: 72px 0;
  }

  .faq__list {
    margin-top: 40px;
    overflow: hidden;
  }

  .faq__question {
    font-size: 0.95rem;
    padding: 20px 0;
  }

  .faq__icon {
    margin-left: 12px;
  }

  .pain__solution-text {
    font-size: 1.1rem;
    padding: 20px 28px;
    white-space: normal;
    max-width: 100%;
    box-sizing: border-box;
    text-align: center;
    line-height: 1.6;
  }

  /* CTA Mobile */
  .cta {
    flex-direction: column;
    height: auto;
    padding: 0;
  }

  .cta__video-area {
    width: 100%;
    max-height: 200px;
  }

  .cta__video {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }

  .cta__content {
    padding: 40px 20px;
    overflow: hidden;
  }

  .cta__inner {
    max-width: 100%;
    overflow: hidden;
  }

  .cta__title {
    font-size: 1.5rem;
  }

  .cta__desc {
    max-width: none;
  }

  .cta .btn--primary {
    font-size: 1rem;
    padding: 18px 40px;
    border-radius: 100px;
  }

  /* Footer Mobile */
  .footer__columns {
    flex-direction: column;
    gap: 40px;
  }

  .footer__links-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .pain__grid {
    grid-template-columns: 1fr;
  }

  .hero__title {
    font-size: 1.5rem;
  }

  .cta__title {
    font-size: 1.25rem;
  }
}