/* ============================================================
   SalesForge - 営業代行ポートフォリオサイト
   モバイルファースト / 統一仕様 (告知バナー + 右ドロワーHM)
   ============================================================ */

/* ---------------- Design Tokens ---------------- */
:root {
  --color-primary: #0f2744;        /* 深紺(メイン) */
  --color-primary-dark: #081a30;
  --color-accent: #c69b3d;         /* ゴールド(アクセント) */
  --color-accent-dark: #a07d2c;
  --color-base: #f7f4ee;           /* 紙色(ベース) */
  --color-text: #1a2233;
  --color-sub: #5b6776;
  --color-border: rgba(26, 34, 51, 0.14);

  --font-serif: "Noto Serif JP", "Yu Mincho", serif;
  --font-sans: "Noto Sans JP", -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", sans-serif;
  --font-en: "Cormorant Garamond", serif;

  --header-h: 64px;
  --radius-sm: 4px;
  --radius-md: 6px;

  --pn-bg: var(--color-primary);
  --pn-fg: var(--color-base);
  --pn-fg-rgb: 247, 244, 238;
  --pn-accent: var(--color-accent);
  --pn-font: var(--font-sans);
}

/* ---------------- Reset ---------------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text);
  background: #fff;
  letter-spacing: 0.02em;
}
img, svg { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font: inherit; color: inherit; cursor: pointer; }

/* ============================================================
   ポートフォリオ告知バナー (統一仕様)
   ============================================================ */
.portfolio-notice {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 300;
  background: var(--pn-bg);
  color: var(--pn-fg);
  padding: 0.55rem 1rem;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-align: center;
  line-height: 1.6;
  border-bottom: 1px solid var(--pn-accent);
  font-family: var(--pn-font);
}
.portfolio-notice strong {
  color: var(--pn-accent);
  letter-spacing: 0.2em;
  margin-right: 0.6rem;
  font-weight: 700;
}
.portfolio-notice .pn-close {
  background: transparent;
  border: 1px solid rgba(var(--pn-fg-rgb), 0.4);
  color: var(--pn-fg);
  font-size: 0.7rem;
  padding: 2px 8px;
  margin-left: 0.8rem;
  cursor: pointer;
  letter-spacing: 0.1em;
  transition: all 0.3s;
  font-family: inherit;
}
.portfolio-notice .pn-close:hover {
  background: var(--pn-accent);
  border-color: var(--pn-accent);
  color: var(--pn-bg);
}

body.notice-visible { padding-top: 44px; }
body.notice-visible .site-header { top: 44px; }
@media (max-width: 720px) {
  .portfolio-notice { font-size: 0.7rem; padding: 0.5rem 0.8rem; }
  body.notice-visible { padding-top: 64px; }
  body.notice-visible .site-header { top: 64px; }
}

/* ============================================================
   Header
   ============================================================ */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  z-index: 200;
  border-bottom: 1px solid var(--color-border);
  transition: top 0.3s;
  /* ❌ backdrop-filter / transform / filter をここに直接書かない */
}
.site-header::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: -1;
}
.header-inner {
  height: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-en);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--color-primary);
  letter-spacing: 0.05em;
}
.logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px; height: 32px;
  background: var(--color-primary);
  color: var(--color-accent);
  font-family: var(--font-serif);
  font-weight: 700;
  border-radius: 2px;
}
.logo-text { font-family: var(--font-en); }

/* PC nav */
.pc-nav { display: none; }
.pc-nav ul {
  display: flex;
  gap: 1.6rem;
}
.pc-nav a {
  font-size: 0.88rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--color-text);
  position: relative;
  padding: 0.3rem 0;
  transition: color 0.2s;
}
.pc-nav a::after {
  content: "";
  position: absolute;
  left: 0; right: 0;
  bottom: -2px;
  height: 1px;
  background: var(--color-accent);
  transform: scaleX(0);
  transition: transform 0.25s;
  transform-origin: center;
}
.pc-nav a:hover { color: var(--color-primary); }
.pc-nav a:hover::after { transform: scaleX(1); }

/* Header CTA (PC) */
.header-cta {
  display: none;
  background: var(--color-primary);
  color: #fff;
  padding: 0.7rem 1.4rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  border: 1px solid var(--color-primary);
  transition: all 0.25s;
}
.header-cta:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-primary);
}

/* ============================================================
   Hamburger (z-index: 220 / drawer より上)
   ============================================================ */
.hamburger {
  width: 44px; height: 44px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  position: relative;
  z-index: 220;
  background: transparent;
  border: 0;
  padding: 0;
}
.hamburger span {
  display: block;
  width: 24px; height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
  transition: transform 0.35s cubic-bezier(.4,0,.2,1), opacity 0.35s;
  transform-origin: center;
}
.hamburger[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.hamburger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.hamburger[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ============================================================
   Drawer Mask + Drawer (右ドロワー / パターンB)
   ============================================================ */
.drawer-mask {
  position: fixed;
  inset: 0;
  background: rgba(15, 39, 68, 0.55);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s;
  z-index: 210;
}
.drawer-mask.is-open {
  opacity: 1;
  pointer-events: auto;
}

.drawer {
  position: fixed;
  top: 0; right: 0;
  width: 82vw;
  max-width: 360px;
  height: 100dvh;
  background: var(--color-base);
  transform: translateX(100%);
  transition: transform 0.4s cubic-bezier(.4,0,.2,1);
  z-index: 215;
  padding: calc(var(--header-h) + 1.2rem) 1.5rem 2rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}
.drawer.is-open {
  transform: translateX(0);
  box-shadow: -8px 0 32px rgba(15, 39, 68, 0.22);
}

/* 告知バナー併用時の押し下げ */
body.notice-visible .drawer { padding-top: calc(var(--header-h) + 44px + 1.2rem); }
@media (max-width: 720px) {
  body.notice-visible .drawer { padding-top: calc(var(--header-h) + 64px + 1.2rem); }
}

.drawer-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-bottom: 2rem;
}
.drawer-list a {
  display: block;
  padding: 1rem 0.4rem;
  border-bottom: 1px solid var(--color-border);
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--color-text);
  transition: color 0.2s, padding-left 0.25s;
}
.drawer-list a:hover { color: var(--color-primary); padding-left: 0.7rem; }

.drawer-cta {
  margin-top: 1rem;
  background: var(--color-primary);
  color: #fff !important;
  border-radius: var(--radius-sm);
  text-align: center;
  padding: 1rem 1rem !important;
  border-bottom: 0 !important;
  font-weight: 700 !important;
  box-shadow: 0 4px 12px rgba(15, 39, 68, 0.25);
}
.drawer-cta:hover {
  background: var(--color-accent) !important;
  color: var(--color-primary) !important;
  padding-left: 1rem !important;
}

.drawer-footer {
  margin-top: auto;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
}
.drawer-tel {
  font-size: 0.85rem;
  color: var(--color-sub);
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}
.drawer-tel a {
  font-family: var(--font-en);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-primary);
  letter-spacing: 0.04em;
}
.drawer-tel small { font-size: 0.7rem; color: var(--color-sub); }

/* ============================================================
   Common: container, buttons, section
   ============================================================ */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.2rem;
}
.container-narrow {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 1.2rem;
}

.section {
  padding: 4rem 0;
}
.section-head {
  text-align: center;
  margin-bottom: 2.5rem;
}
.section-en {
  font-family: var(--font-en);
  font-size: 1rem;
  letter-spacing: 0.18em;
  color: var(--color-accent);
  text-transform: uppercase;
  margin-bottom: 0.4rem;
}
.section-title {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--color-primary);
  margin-bottom: 0.6rem;
}
.section-lead {
  color: var(--color-sub);
  font-size: 0.92rem;
  line-height: 1.85;
}
.section-head-light .section-title { color: var(--color-base); }
.section-head-light .section-lead { color: rgba(247, 244, 238, 0.85); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  min-height: 48px;
  padding: 0 1.6rem;
  font-size: 0.92rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  border-radius: var(--radius-sm);
  transition: all 0.25s;
  border: 1px solid transparent;
  text-align: center;
  line-height: 1.3;
}
.btn-lg { min-height: 56px; padding: 0 2rem; font-size: 1rem; flex-direction: column; gap: 0; }
.btn-lg small { display: block; font-size: 0.7rem; font-weight: 400; letter-spacing: 0.1em; opacity: 0.85; margin-top: 2px; }

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}
.btn-primary:hover {
  background: var(--color-accent);
  color: var(--color-primary);
  border-color: var(--color-accent);
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(198, 155, 61, 0.35);
}
.btn-ghost {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn-ghost:hover {
  background: var(--color-primary);
  color: #fff;
}
.btn-ghost-light {
  background: transparent;
  color: var(--color-base);
  border-color: rgba(247, 244, 238, 0.5);
}
.btn-ghost-light:hover {
  background: var(--color-accent);
  color: var(--color-primary);
  border-color: var(--color-accent);
}

.section-cta {
  text-align: center;
  margin-top: 2.5rem;
}

.sp-only { display: inline; }
@media (min-width: 768px) { .sp-only { display: none; } }

/* ============================================================
   Hero
   ============================================================ */
.hero {
  position: relative;
  min-height: calc(100dvh - var(--header-h));
  padding: calc(var(--header-h) + 2rem) 1.2rem 3rem;
  display: flex;
  align-items: center;
  overflow: hidden;
  color: var(--color-base);
}
body.notice-visible .hero {
  padding-top: calc(var(--header-h) + 64px + 2rem);
}
@media (min-width: 721px) {
  body.notice-visible .hero {
    padding-top: calc(var(--header-h) + 44px + 2rem);
  }
}
.hero-bg { position: absolute; inset: 0; z-index: 0; }
.hero-bg img {
  width: 100%; height: 100%;
  object-fit: cover;
  filter: grayscale(0.4) brightness(0.55);
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(8, 26, 48, 0.85) 0%, rgba(15, 39, 68, 0.7) 100%);
}
.hero-inner {
  position: relative;
  z-index: 1;
  max-width: 1100px;
  margin: 0 auto;
  width: 100%;
}
.hero-en {
  font-family: var(--font-en);
  font-size: 1rem;
  letter-spacing: 0.2em;
  color: var(--color-accent);
  margin-bottom: 1rem;
  font-style: italic;
}
.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 8vw, 3.6rem);
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 0.04em;
  margin-bottom: 1.4rem;
}
.hero-title span { display: block; }
.hero-accent {
  color: var(--color-accent);
  position: relative;
}
.hero-lead {
  font-size: 0.95rem;
  line-height: 2;
  margin-bottom: 2rem;
  color: rgba(247, 244, 238, 0.92);
  max-width: 640px;
}
.hero-cta {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  margin-bottom: 3rem;
}
.hero-cta .btn-ghost {
  color: var(--color-base);
  border-color: rgba(247, 244, 238, 0.45);
}
.hero-cta .btn-ghost:hover {
  background: var(--color-base);
  color: var(--color-primary);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.6rem;
  padding-top: 1.6rem;
  border-top: 1px solid rgba(247, 244, 238, 0.2);
  max-width: 640px;
}
.hero-stats li {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.2rem;
}
.stat-num {
  font-family: var(--font-en);
  font-size: clamp(1.6rem, 6vw, 2.6rem);
  font-weight: 600;
  color: var(--color-accent);
  line-height: 1;
}
.stat-num small { font-size: 0.55em; margin-left: 2px; }
.stat-label {
  font-size: 0.7rem;
  color: rgba(247, 244, 238, 0.85);
  letter-spacing: 0.08em;
}
.stat-label em {
  display: block;
  font-style: normal;
  font-size: 0.6rem;
  opacity: 0.7;
  margin-top: 1px;
}

/* ============================================================
   Problem
   ============================================================ */
.section-problem {
  background: var(--color-base);
}
.problem-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}
.problem-card {
  background: #fff;
  padding: 1.6rem 1.4rem;
  border: 1px solid var(--color-border);
  border-top: 3px solid var(--color-accent);
  border-radius: var(--radius-sm);
}
.problem-card h3 {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 1rem;
  line-height: 1.5;
}
.problem-card ul li {
  font-size: 0.88rem;
  line-height: 1.85;
  padding-left: 1.2rem;
  position: relative;
  color: var(--color-sub);
  margin-bottom: 0.4rem;
}
.problem-card ul li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: 700;
}

/* ============================================================
   Features
   ============================================================ */
.section-features {
  background: #fff;
}
.feature-list {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}
.feature-item {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}
.feature-img {
  border-radius: var(--radius-md);
  overflow: hidden;
  aspect-ratio: 4 / 3;
}
.feature-img img {
  width: 100%; height: 100%;
  object-fit: cover;
}
.feature-num {
  font-family: var(--font-en);
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--color-accent);
  letter-spacing: 0.1em;
  margin-bottom: 0.4rem;
}
.feature-body h3 {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.8rem;
  line-height: 1.5;
}
.feature-body p {
  font-size: 0.92rem;
  line-height: 1.95;
  color: var(--color-text);
}

/* ============================================================
   Service
   ============================================================ */
.section-service {
  background: var(--color-base);
}
.service-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.8rem;
}
.service-card {
  background: #fff;
  padding: 1.4rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--color-primary);
  transition: all 0.25s;
}
.service-card:hover {
  border-left-color: var(--color-accent);
  transform: translateX(2px);
  box-shadow: 0 4px 16px rgba(15, 39, 68, 0.08);
}
.service-card h3 {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
  line-height: 1.5;
}
.service-card p {
  font-size: 0.85rem;
  line-height: 1.85;
  color: var(--color-sub);
}

/* ============================================================
   Cases
   ============================================================ */
.section-cases {
  background: #fff;
}
.case-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.4rem;
}
.case-card {
  background: var(--color-base);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: transform 0.25s, box-shadow 0.25s;
}
.case-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 28px rgba(15, 39, 68, 0.12);
}
.case-img { aspect-ratio: 16 / 9; overflow: hidden; }
.case-img img { width: 100%; height: 100%; object-fit: cover; }
.case-body { padding: 1.2rem 1.4rem 1.6rem; }
.case-tag {
  display: inline-block;
  font-family: var(--font-en);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--color-accent);
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}
.case-body h3 {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
  line-height: 1.5;
}
.case-body p {
  font-size: 0.85rem;
  line-height: 1.85;
  color: var(--color-sub);
}

/* ============================================================
   FAQ
   ============================================================ */
.section-faq {
  background: var(--color-base);
}
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}
.faq-item {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.1rem 1.2rem;
  background: transparent;
  border: 0;
  text-align: left;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-primary);
  line-height: 1.6;
}
.faq-q > span:first-child {
  flex: 1;
}
.faq-q::before {
  content: "Q.";
  font-family: var(--font-en);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-accent);
  margin-right: 0.6rem;
  flex-shrink: 0;
}
.faq-icon {
  width: 16px; height: 16px;
  position: relative;
  flex-shrink: 0;
  transition: transform 0.3s;
}
.faq-icon::before, .faq-icon::after {
  content: "";
  position: absolute;
  left: 50%; top: 50%;
  background: var(--color-primary);
}
.faq-icon::before { width: 14px; height: 2px; transform: translate(-50%, -50%); }
.faq-icon::after { width: 2px; height: 14px; transform: translate(-50%, -50%); transition: transform 0.3s; }
.faq-q[aria-expanded="true"] .faq-icon::after { transform: translate(-50%, -50%) rotate(90deg); opacity: 0; }

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 1.2rem;
}
.faq-a p {
  font-size: 0.88rem;
  line-height: 1.95;
  color: var(--color-sub);
  padding-left: 2rem;
  position: relative;
}
.faq-a p::before {
  content: "A.";
  font-family: var(--font-en);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-accent);
  position: absolute;
  left: 0;
  top: -2px;
}
.faq-item.is-open .faq-a {
  max-height: 500px;
  padding: 0 1.2rem 1.2rem;
}

/* ============================================================
   Company
   ============================================================ */
.section-company {
  background: #fff;
}
.company-list {
  border-top: 1px solid var(--color-border);
}
.company-list > div {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.2rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--color-border);
}
.company-list dt {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: 0.08em;
}
.company-list dd {
  font-size: 0.92rem;
  color: var(--color-text);
  line-height: 1.8;
}
.company-list dd small {
  display: inline-block;
  font-size: 0.72rem;
  color: var(--color-sub);
  margin-left: 0.4rem;
}

/* ============================================================
   Contact
   ============================================================ */
.section-contact {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: var(--color-base);
  position: relative;
  overflow: hidden;
}
.section-contact::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 80% 20%, rgba(198, 155, 61, 0.18) 0%, transparent 40%),
    radial-gradient(circle at 20% 80%, rgba(198, 155, 61, 0.10) 0%, transparent 40%);
  pointer-events: none;
}
.section-contact .container-narrow { position: relative; z-index: 1; }
.contact-actions {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 2rem;
}
.disclaimer {
  font-size: 0.78rem;
  color: rgba(247, 244, 238, 0.7);
  line-height: 1.85;
  text-align: center;
  border: 1px solid rgba(247, 244, 238, 0.2);
  padding: 1rem;
  border-radius: var(--radius-sm);
}

/* ============================================================
   Footer
   ============================================================ */
.site-footer {
  background: var(--color-primary-dark);
  color: rgba(247, 244, 238, 0.85);
  padding: 3rem 0 2rem;
}
.footer-grid {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  margin-bottom: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid rgba(247, 244, 238, 0.12);
}
.footer-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-en);
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--color-base);
  margin-bottom: 0.8rem;
}
.footer-addr {
  font-size: 0.85rem;
  line-height: 1.85;
  color: rgba(247, 244, 238, 0.7);
}
.footer-addr small { font-size: 0.72rem; opacity: 0.7; }
.footer-nav ul {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.6rem 1rem;
}
.footer-nav a {
  font-size: 0.85rem;
  color: rgba(247, 244, 238, 0.85);
  transition: color 0.2s;
}
.footer-nav a:hover { color: var(--color-accent); }
.copyright {
  font-size: 0.75rem;
  color: rgba(247, 244, 238, 0.55);
  text-align: center;
  line-height: 1.85;
}
.copyright small {
  display: block;
  font-size: 0.7rem;
  margin-top: 0.4rem;
  opacity: 0.85;
}

/* ============================================================
   To Top
   ============================================================ */
.to-top {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  width: 44px; height: 44px;
  background: var(--color-primary);
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
  border-radius: 50%;
  font-size: 1.2rem;
  font-weight: 700;
  z-index: 150;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.3s, transform 0.3s, background 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
}
.to-top.is-visible {
  opacity: 1;
  transform: translateY(0);
}
.to-top:hover {
  background: var(--color-accent);
  color: var(--color-primary);
}

/* ============================================================
   Tablet (>= 768px)
   ============================================================ */
@media (min-width: 768px) {
  .hamburger { display: none; }
  .pc-nav { display: flex; }
  .header-cta { display: inline-flex; }

  .section { padding: 5.5rem 0; }
  .section-title { font-size: 2rem; }

  .hero-cta { flex-direction: row; }
  .hero-cta .btn { min-width: 200px; }

  .problem-grid { grid-template-columns: repeat(3, 1fr); gap: 1.4rem; }

  .feature-item {
    flex-direction: row;
    align-items: center;
    gap: 2.5rem;
  }
  .feature-item.reverse { flex-direction: row-reverse; }
  .feature-img { flex: 1; }
  .feature-body { flex: 1; }

  .service-grid { grid-template-columns: repeat(2, 1fr); gap: 1rem; }
  .case-grid { grid-template-columns: repeat(3, 1fr); }

  .company-list > div {
    grid-template-columns: 180px 1fr;
    gap: 1rem;
    padding: 1.2rem 0;
  }

  .contact-actions { flex-direction: row; justify-content: center; gap: 1.2rem; }
  .contact-actions .btn { min-width: 240px; }

  .footer-grid {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-start;
  }
  .footer-nav ul { grid-template-columns: repeat(3, 1fr); gap: 0.6rem 1.6rem; }

  .to-top { right: 1.5rem; bottom: 1.5rem; width: 48px; height: 48px; }
}

/* ============================================================
   Desktop (>= 1024px)
   ============================================================ */
@media (min-width: 1024px) {
  :root { --header-h: 72px; }
  .section { padding: 6.5rem 0; }
  .section-title { font-size: 2.2rem; }

  .hero-title { font-size: 3.6rem; }
  .hero-lead { font-size: 1rem; }

  .service-grid { grid-template-columns: repeat(4, 1fr); }
}