@charset "UTF-8";
/* 共通CSS: 以前は各ページの<style>に直書き（8ページで共通） */

/* ---- style ---- */

  * { margin: 0; padding: 0; box-sizing: border-box; }
  html { scroll-behavior: smooth; }

  :root {
    --ink: #0d3454;
    --ink-deep: #073b6b;
    --paper: #e8f8ff;
    --paper-warm: #f7fbff;
    --fiber: #f0a154;
    --fiber-deep: #c97a2e;
    --air: #00a3e0;
    --air-deep: #0077b6;
    --theme: #00a88e;
    --theme-dark: #071421;
    --theme-soft: #e7fbf7;
    --line: #dbeafe;
    --blue: #0077b6;
    --blue-bright: #00a3e0;
    --type-serif: "Zen Old Mincho", "Hiragino Mincho ProN", serif;
    --type-sans: "Zen Kaku Gothic New", "Hiragino Kaku Gothic ProN", sans-serif;
    --type-mono: "JetBrains Mono", monospace;
  }

  body {
    font-family: var(--type-sans);
    color: var(--ink);
    background: var(--paper-warm);
    line-height: 1.82;
    font-size: 16px;
    padding-top: 72px;
  }

  .container { max-width: 1180px; margin: 0 auto; padding: 0 32px; }

  .eyebrow {
    font-family: var(--type-mono);
    font-size: 0.72rem;
    letter-spacing: 0.22em;
    color: var(--fiber-deep);
    text-transform: uppercase;
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 14px;
  }
  .eyebrow::before {
    content: '';
    width: 22px;
    height: 1px;
    background: var(--fiber-deep);
    display: inline-block;
  }

  .section-head { margin-bottom: 56px; max-width: 640px; }
  .section-head h2 {
    font-family: var(--type-serif);
    font-size: 2.1rem;
    font-weight: 700;
    color: var(--ink);
    line-height: 1.5;
    letter-spacing: 0.02em;
  }
  .section-head p.lead {
    margin-top: 16px;
    color: #4d6478;
    font-size: 1rem;
  }
  .section-head.center { margin-left: auto; margin-right: auto; text-align: center; }

  /* ===== ヘッダー ===== */
  header {
    background: rgba(255,255,255,0.96);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--line);
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 200;
  }
  .header-inner { display: flex; justify-content: space-between; align-items: center; height: 72px; }
  .logo { display: flex; align-items: center; gap: 12px; text-decoration: none; color: var(--ink); }
  .logo .mark { width: 32px; height: 32px; flex-shrink: 0; }
  .logo .mark img { width: 100%; height: 100%; object-fit: contain; display: block; }
  .logo .word { font-family: var(--type-serif); font-size: 1.05rem; font-weight: 700; letter-spacing: 0.04em; line-height: 1.2; }
  .logo .word span { display: block; font-family: var(--type-mono); font-size: 0.62rem; letter-spacing: 0.18em; color: var(--fiber-deep); font-weight: 400; }

  /* PCナビ */
  nav ul { display: flex; list-style: none; gap: 34px; }
  nav > ul > li { position: relative; }
  nav a { text-decoration: none; color: var(--ink); font-weight: 500; font-size: 0.92rem; position: relative; padding-bottom: 4px; }
  nav > ul > li > a::after { content: ''; position: absolute; left: 0; right: 0; bottom: 0; height: 1px; background: var(--fiber); transform: scaleX(0); transition: transform 0.25s ease; }
  nav > ul > li > a:hover::after { transform: scaleX(1); }
  nav .nav-cta { background: var(--ink-deep); color: #fff !important; padding: 10px 20px; border-radius: 2px; font-size: 0.85rem; }
  nav .nav-cta::after { display: none; }
  nav .nav-cta:hover { background: var(--blue); }

  /* ドロップダウン */
  .has-dropdown > a { display: inline-flex; align-items: center; gap: 5px; }
  .has-dropdown > a .caret { width: 9px; height: 9px; transition: transform 0.2s; }
  .has-dropdown:hover > a .caret { transform: rotate(180deg); }
  .dropdown { position: absolute; top: calc(100% + 14px); left: -22px; width: 300px; background: var(--paper-warm); border: 1px solid var(--line); box-shadow: 0 18px 40px rgba(15,76,124,0.14); padding: 10px; opacity: 0; visibility: hidden; transform: translateY(6px); transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s; z-index: 50; }
  .has-dropdown:hover .dropdown, .has-dropdown:focus-within .dropdown { opacity: 1; visibility: visible; transform: translateY(0); }
  .dropdown a.dd-item { display: flex; align-items: baseline; gap: 10px; padding: 11px 12px; border-radius: 2px; font-size: 0.88rem; color: var(--ink); }
  .dropdown a.dd-item::after { display: none; }
  .dropdown a.dd-item:hover { background: var(--paper); }
  .dropdown a.dd-item .dd-tag { font-family: var(--type-mono); font-size: 0.66rem; color: var(--theme); letter-spacing: 0.04em; white-space: nowrap; flex-shrink: 0; }
  .dropdown hr { border: none; border-top: 1px solid var(--line); margin: 6px 4px; }

  /* ハンバーガーボタン */
  .hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 44px; height: 44px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 300;
  }
  .hamburger span {
    display: block;
    width: 24px; height: 2px;
    background: var(--ink);
    border-radius: 2px;
    transition: transform 0.3s ease, opacity 0.3s ease;
  }
  .hamburger.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .hamburger.is-open span:nth-child(2) { opacity: 0; }
  .hamburger.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

  /* モバイルメニューオーバーレイ */
  .mobile-menu {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(7,59,107,0.98);
    z-index: 150;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 0;
    opacity: 0;
    transition: opacity 0.3s ease;
  }
  .mobile-menu.is-open { opacity: 1; }
  .mobile-menu a {
    display: block;
    color: #fff;
    text-decoration: none;
    font-family: var(--type-serif);
    font-size: 1.5rem;
    padding: 20px 0;
    border-bottom: 1px solid rgba(255,255,255,0.12);
    width: 260px;
    text-align: center;
    font-weight: 700;
    letter-spacing: 0.06em;
    transition: color 0.2s;
  }
  .mobile-menu a:first-child { border-top: 1px solid rgba(255,255,255,0.12); }
  .mobile-menu a:hover { color: var(--air); }
  .mobile-menu .m-cta {
    margin-top: 32px;
    background: var(--brand-blue, #00a3e0);
    color: var(--ink-deep) !important;
    border-radius: 3px;
    padding: 18px 0;
    border: none;
  }

  /* ===== フルスクリーンスライダー ===== */
  .hero-slider {
    position: relative;
    height: 100vh;
    min-height: 600px;
    overflow: hidden;
    background: linear-gradient(115deg,#071421,#0f1f33);
  }
  .slide {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: flex-end;
    padding-bottom: 80px;
    opacity: 0;
    transition: opacity 0.8s ease;
    pointer-events: none;
  }
  .slide.is-active { opacity: 1; pointer-events: auto; }
  .slide-bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    transition: transform 8s ease;
  }
  .slide.is-active .slide-bg { transform: scale(1.04); }
  .slide-scrim {
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(7,59,107,0.5) 0%, rgba(7,59,107,0.24) 55%, rgba(7,59,107,0.04) 100%),
                linear-gradient(180deg, transparent 45%, rgba(7,59,107,0.42) 100%);
  }
  .slide-body {
    position: relative;
    z-index: 2;
    max-width: 640px;
    padding: 0 48px;
  }
  .slide-tag {
    font-family: var(--type-mono);
    font-size: 0.7rem;
    letter-spacing: 0.22em;
    color: var(--air);
    text-transform: uppercase;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    text-shadow: -1px -1px 2px rgba(0,0,0,.9), 1px -1px 2px rgba(0,0,0,.9), -1px 1px 2px rgba(0,0,0,.9), 1px 1px 2px rgba(0,0,0,.9), 0 2px 8px rgba(0,0,0,.5);
  }
  .slide-tag::before { content: ''; width: 28px; height: 1px; background: var(--air); filter: drop-shadow(0 1px 2px rgba(0,0,0,.7)); }
  .slide-body h1 {
    font-family: var(--type-serif);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    color: #fff;
    line-height: 1.4;
    margin-bottom: 18px;
    letter-spacing: 0.02em;
    text-shadow: 0 2px 14px rgba(0,0,0,.55);
  }
  .slide-body p {
    font-size: 0.95rem;
    color: rgba(255,255,255,0.82);
    line-height: 1.9;
    margin-bottom: 32px;
    max-width: 480px;
    text-shadow: 0 1px 8px rgba(0,0,0,.55);
  }
  .slide-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--air);
    color: var(--ink-deep);
    font-weight: 700;
    font-size: 0.9rem;
    padding: 14px 28px;
    text-decoration: none;
    border-radius: 2px;
    transition: background 0.2s, transform 0.2s;
  }
  .slide-btn:hover { background: #fff; color: var(--ink); transform: translateX(4px); }
  .slide-btn svg { width: 16px; height: 16px; transition: transform 0.2s; }
  .slide-btn:hover svg { transform: translateX(3px); }

  /* 矢印 */
  .slider-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 10;
    width: 52px; height: 52px;
    background: rgba(255,255,255,0.12);
    border: 1px solid rgba(255,255,255,0.3);
    color: #fff;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
  }
  .slider-arrow:hover { background: rgba(255,255,255,0.25); }
  .slider-arrow.prev { left: 28px; }
  .slider-arrow.next { right: 28px; }
  .slider-arrow svg { width: 20px; height: 20px; }

  /* ドット */
  .slider-dots {
    position: absolute;
    bottom: 28px;
    right: 48px;
    display: flex;
    gap: 8px;
    z-index: 10;
  }
  .slider-dot {
    width: 8px; height: 8px;
    border-radius: 50%;
    background: rgba(255,255,255,0.35);
    border: none;
    cursor: pointer;
    transition: background 0.2s, transform 0.2s;
  }
  .slider-dot.is-active { background: var(--theme,#00a88e); transform: scale(1.25); }

  /* スクロールヒント */
  .scroll-hint {
    position: absolute;
    bottom: 28px;
    left: 48px;
    z-index: 10;
    display: flex;
    align-items: center;
    gap: 8px;
    color: rgba(255,255,255,0.55);
    font-family: var(--type-mono);
    font-size: 0.68rem;
    letter-spacing: 0.15em;
  }
  .scroll-hint-line { width: 32px; height: 1px; background: rgba(255,255,255,0.35); }

  /* ===== スクロールアニメーション ===== */
  .fade-up {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.65s ease, transform 0.65s ease;
  }
  .fade-up.is-visible { opacity: 1; transform: translateY(0); }
  .fade-up:nth-child(2) { transition-delay: 0.1s; }
  .fade-up:nth-child(3) { transition-delay: 0.2s; }
  .fade-up:nth-child(4) { transition-delay: 0.3s; }

  .trust { background: var(--paper-warm); border-bottom: 1px solid var(--line); padding: 36px 0; }
  .cert-row {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    padding-top: 22px;
    margin-top: 22px;
    border-top: 1px solid var(--line);
  }
  .cert-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.78rem;
    color: var(--ink);
    background: var(--paper);
    border: 1px solid var(--line);
    padding: 7px 14px;
    border-radius: 999px;
    font-weight: 500;
  }
  .cert-chip svg { width: 13px; height: 13px; color: var(--fiber-deep); flex-shrink: 0; }
  .trust-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; }
  .trust-item { text-align: center; padding: 0 20px; border-right: 1px solid var(--line); }
  .trust-item:last-child { border-right: none; }
  .trust-item .num { font-family: var(--type-mono); font-size: 2rem; font-weight: 500; color: var(--air); display: block; }
  .trust-item .num em { font-style: normal; font-size: 1.1rem; }
  .trust-item .label { font-size: 0.82rem; color: #4d6478; margin-top: 4px; display: block; }
  @media (max-width: 760px) {
    .trust-grid { grid-template-columns: repeat(2, 1fr); gap: 24px 0; }
    .trust-item { border-right: none; border-bottom: 1px solid var(--line); padding-bottom: 16px; }
  }


  /* ===== 用途・課題から探す（ハブ） ===== */
  .usecases { padding: 110px 0 100px; background: linear-gradient(145deg,var(--theme-dark,#071421),var(--ink-deep)); position: relative; overflow: hidden; }
  .usecases::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: repeating-linear-gradient(115deg, rgba(255,255,255,0.04) 0px, rgba(255,255,255,0.04) 1px, transparent 1px, transparent 9px);
    pointer-events: none;
  }
  .usecases .container { position: relative; z-index: 1; }
  .usecases .section-head h2 { color: var(--paper-warm); }
  .usecases .section-head p.lead { color: #b9d6ea; }
  .usecases .eyebrow { color: var(--theme,#00a88e); }
  .usecases .eyebrow::before { background: var(--theme,#00a88e); }
  .usecase-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1px;
    background: rgba(255,255,255,0.14);
  }
  .usecase-card {
    background: rgba(7,20,33,0.82);
    padding: 34px 28px 30px;
    text-decoration: none;
    color: var(--paper-warm);
    display: flex;
    flex-direction: column;
    min-height: 290px;
    position: relative;
    transition: background-color 0.25s;
  }
  .usecase-card:hover { background: rgba(0,168,142,0.2); border-top: 1px solid rgba(0,168,142,0.4); }
  .usecase-card .uc-tag {
    font-family: var(--type-mono);
    font-size: 0.66rem;
    letter-spacing: 0.12em;
    color: var(--fiber);
    text-transform: uppercase;
    margin-bottom: 18px;
  }
  .usecase-card .icon { width: 38px; height: 38px; color: var(--theme,#00a88e); margin-bottom: 18px; }
  .usecase-card h3 {
    font-family: var(--type-serif);
    font-size: 1.18rem;
    font-weight: 700;
    line-height: 1.6;
    margin-bottom: 14px;
  }
  .usecase-card p {
    font-size: 0.85rem;
    color: #b9d6ea;
    flex: 1;
  }
  .usecase-card .uc-go {
    margin-top: 18px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--theme,#00a88e);
  }
  .usecase-card .uc-go svg { width: 14px; height: 14px; transition: transform 0.25s; }
  .usecase-card:hover .uc-go svg { transform: translateX(4px); }
  .usecase-more {
    margin-top: 1px;
    background: rgba(255,255,255,0.06);
    padding: 22px 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 14px;
  }
  .usecase-more p { color: #cfe6f7; font-size: 0.9rem; }
  .usecase-more a {
    color: var(--paper-warm);
    text-decoration: none;
    font-size: 0.88rem;
    border-bottom: 1px solid rgba(255,255,255,0.4);
    padding-bottom: 2px;
  }
  @media (max-width: 960px) {
    .usecase-grid { grid-template-columns: repeat(2, 1fr); }
  }
  @media (max-width: 640px) {
    .usecase-grid { grid-template-columns: 1fr; }
  }

  /* ===== お悩み解決 ===== */
  .problems { padding: 110px 0; background: var(--paper-warm); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
  .problem-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0;
    border: 1px solid var(--line);
  }
  .problem-card {
    padding: 44px 36px;
    border-right: 1px solid var(--line);
    position: relative;
  }
  .problem-card:last-child { border-right: none; }
  .problem-card .icon { width: 46px; height: 46px; margin-bottom: 24px; color: var(--air-deep); }
  .problem-card .tag {
    font-family: var(--type-mono);
    font-size: 0.68rem;
    letter-spacing: 0.14em;
    color: var(--fiber-deep);
    text-transform: uppercase;
    margin-bottom: 10px;
    display: block;
  }
  .problem-card h3 { font-family: var(--type-serif); font-size: 1.25rem; margin-bottom: 16px; color: var(--ink); font-weight: 700; }
  .problem-card p { font-size: 0.92rem; color: #4d6478; }
  .problem-card .pc-links { margin-top: 16px; display: flex; flex-direction: column; gap: 6px; }
  .problem-card .pc-links a { font-size: 0.82rem; color: var(--air-deep); text-decoration: none; border-bottom: 1px solid transparent; }
  .problem-card .pc-links a:hover { border-bottom-color: var(--air-deep); }

  /* ===== 強みセクション ===== */
  .features { padding: 110px 0; background: var(--paper); }
  .feature-list { display: flex; flex-direction: column; }
  .feature-row {
    display: grid;
    grid-template-columns: 120px 1fr 1.4fr;
    gap: 40px;
    align-items: start;
    padding: 38px 0;
    border-top: 1px solid var(--line);
  }
  .feature-row:last-child { border-bottom: 1px solid var(--line); }
  .feature-tag {
    font-family: var(--type-mono);
    font-size: 0.72rem;
    letter-spacing: 0.1em;
    color: var(--fiber-deep);
    padding-top: 4px;
  }
  .feature-row h3 { font-family: var(--type-serif); font-size: 1.3rem; font-weight: 700; color: var(--ink); line-height: 1.5; }
  .feature-row p { color: #4d6478; font-size: 0.95rem; }

  /* ===== 製品・事例セクション ===== */
  .solutions { padding: 110px 0; background: var(--paper-warm); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
  .solution-tabs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
  .sol-card { background: var(--paper-warm); }
  .sol-img-placeholder {
    height: 180px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(150deg, var(--blue-bright) 0%, var(--ink-deep) 100%);
    position: relative;
    overflow: hidden;
  }
  .sol-img-placeholder svg { width: 100%; height: 100%; }
  .sol-img-placeholder span {
    position: absolute;
    bottom: 14px;
    left: 18px;
    font-family: var(--type-mono);
    font-size: 0.68rem;
    letter-spacing: 0.08em;
    color: var(--paper-warm);
    z-index: 2;
  }
  .sol-body { padding: 28px 30px 34px; }
  .sol-body h3 { font-family: var(--type-serif); font-size: 1.12rem; margin-bottom: 12px; color: var(--ink); font-weight: 700; }
  .sol-body p { color: #4d6478; font-size: 0.92rem; }

  /* ===== CTA ===== */
  .cta { background: linear-gradient(150deg, var(--blue-bright) 0%, var(--ink-deep) 100%); padding: 110px 0; text-align: center; position: relative; overflow: hidden; }
  .cta::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: repeating-linear-gradient(115deg, rgba(244,240,230,0.03) 0px, rgba(244,240,230,0.03) 1px, transparent 1px, transparent 9px);
  }
  .cta-inner { position: relative; z-index: 1; max-width: 600px; margin: 0 auto; }
  .cta .eyebrow { justify-content: center; color: var(--fiber); }
  .cta .eyebrow::before { display: none; }
  .cta h2 { font-family: var(--type-serif); font-size: 2rem; margin-bottom: 22px; color: var(--paper-warm); font-weight: 700; line-height: 1.6; }
  .cta p { margin-bottom: 42px; color: #dceefb; font-size: 1rem; }
  .cta-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--fiber);
    color: var(--ink-deep);
    padding: 18px 44px;
    text-decoration: none;
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    white-space: nowrap;
    transition: background-color 0.25s;
  }
  .cta-btn:hover { opacity: 0.88; }
  .cta-btn svg { width: 16px; height: 16px; transition: transform 0.25s; flex-shrink: 0; }
  .cta-btn:hover svg { transform: translateX(4px); }

  /* ===== お知らせ ===== */
  .news { padding: 90px 0; background: var(--paper); }
  .news-list {
    border-top: 1px solid var(--line);
    max-height: 320px;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--air-deep) var(--paper);
  }
  .news-list::-webkit-scrollbar { width: 6px; }
  .news-list::-webkit-scrollbar-track { background: var(--paper); }
  .news-list::-webkit-scrollbar-thumb { background: var(--air-deep); border-radius: 3px; }
  .news-wrap { position: relative; }
  .news-wrap::after {
    content: '';
    position: absolute;
    left: 0; right: 6px; bottom: 0;
    height: 28px;
    background: linear-gradient(180deg, transparent, var(--paper));
    pointer-events: none;
  }
  .news-item {
    display: grid;
    grid-template-columns: 140px 1fr;
    gap: 24px;
    padding: 22px 0;
    border-bottom: 1px solid var(--line);
    text-decoration: none;
    color: var(--ink);
  }
  .news-item:hover .news-title { text-decoration: underline; }
  .news-date { font-family: var(--type-mono); font-size: 0.82rem; color: #7c93a4; padding-top: 2px; }
  .news-title { font-size: 0.95rem; line-height: 1.7; }
  .news-foot { margin-top: 24px; text-align: right; }
  .news-foot a { font-size: 0.88rem; color: var(--air-deep); text-decoration: none; border-bottom: 1px solid var(--line); padding-bottom: 2px; }
  @media (max-width: 640px) {
    .news-item { grid-template-columns: 1fr; gap: 6px; }
  }
  footer { background: linear-gradient(135deg,var(--theme-dark,#071421),#0a1e35); color: #b8d9f0; padding: 64px 0 28px; font-size: 0.78rem; border-top: 1px solid rgba(255,255,255,0.12); }
  .footer-grid {
    display: grid;
    grid-template-columns: 1.3fr 1fr 1fr 1fr;
    gap: 32px;
    padding-bottom: 36px;
    border-bottom: 1px solid rgba(255,255,255,0.12);
    text-align: left;
  }
  .footer-grid h4 {
    font-family: var(--type-mono);
    font-size: 0.7rem;
    letter-spacing: 0.1em;
    color: var(--fiber);
    text-transform: uppercase;
    margin-bottom: 16px;
  }
  .footer-grid ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
  .footer-grid a { color: #cfe6f7; text-decoration: none; font-family: var(--type-sans); font-size: 0.85rem; }
  .footer-grid a:hover { color: #fff; text-decoration: underline; }
  .footer-bottom { text-align: center; padding-top: 24px; font-family: var(--type-mono); letter-spacing: 0.04em; }
  @media (max-width: 760px) {
    .footer-grid { grid-template-columns: 1fr 1fr; }
  }

  @media (max-width: 960px) {
    .problem-grid { grid-template-columns: 1fr; }
    .problem-card { border-right: none; border-bottom: 1px solid var(--line); }
    .problem-card:last-child { border-bottom: none; }
    .feature-row { grid-template-columns: 1fr; gap: 12px; }
    .solution-tabs { grid-template-columns: 1fr; }
    .section-head h2 { font-size: 1.7rem; }
  }
  @media (max-width: 768px) {
    nav ul, nav .nav-cta { display: none; }
    .hamburger { display: flex; }
    .slider-arrow { width: 40px; height: 40px; }
    .slider-arrow.prev { left: 12px; }
    .slider-arrow.next { right: 12px; }
    .slide-body { padding: 0 28px; }
    .slide-body h1 { font-size: 1.7rem; }
    .scroll-hint { left: 24px; }
    .slider-dots { right: 24px; }
  }
  @media (max-width: 640px) {
    .container { padding: 0 22px; }
  }

  /* ===== ページヘッダー（製品ページ用） ===== */
  .page-hero {
    background: linear-gradient(150deg, var(--blue-bright) 0%, var(--ink-deep) 100%);
    padding: 64px 0 48px;
    position: relative;
    overflow: hidden;
  }
  .page-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: repeating-linear-gradient(115deg, rgba(255,255,255,0.04) 0px, rgba(255,255,255,0.04) 1px, transparent 1px, transparent 9px);
  }
  .page-hero .container { position: relative; z-index: 1; }
  .breadcrumb { display: flex; align-items: center; gap: 8px; font-family: var(--type-mono); font-size: 0.72rem; letter-spacing: 0.05em; color: #a9cbe3; margin-bottom: 22px; flex-wrap: wrap; }
  .breadcrumb a { color: #a9cbe3; text-decoration: none; }
  .breadcrumb a:hover { color: #fff; text-decoration: underline; }
  .breadcrumb .sep { color: #4f7d99; }
  .breadcrumb .current { color: #fff; }
  .page-hero .eyebrow { color: var(--theme); }
  .page-hero .eyebrow::before { background: var(--theme); }
  .page-hero h1 {
    font-family: var(--type-serif);
    font-size: clamp(1.8rem, 3.6vw, 2.6rem);
    font-weight: 700;
    color: #fff;
    line-height: 1.5;
    margin-bottom: 16px;
    letter-spacing: 0.02em;
  }
  .page-hero p.lead { color: #cfe6f7; font-size: 0.98rem; max-width: 620px; line-height: 1.9; }

  /* ===== クイックナビ（製品タイプへのアンカー） ===== */
  .quicknav-wrap { background: var(--paper-warm); border-bottom: 1px solid var(--line); position: sticky; top: 72px; z-index: 90; }
  .quicknav { display: flex; gap: 4px; overflow-x: auto; padding: 14px 0; scrollbar-width: none; }
  .quicknav::-webkit-scrollbar { display: none; }
  .quicknav a {
    flex-shrink: 0;
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--ink);
    text-decoration: none;
    padding: 8px 16px;
    border: 1px solid var(--line);
    border-radius: 999px;
    white-space: nowrap;
    transition: background 0.2s, color 0.2s, border-color 0.2s;
  }
  .quicknav a:hover { background: var(--paper); border-color: var(--air); }
  .quicknav a .qn-badge { font-family: var(--type-mono); font-size: 0.62rem; color: var(--fiber-deep); margin-right: 6px; }

  /* ===== イントロ（製品紹介の導入） ===== */
  .intro-band { padding: 72px 0 20px; background: var(--paper-warm); }
  .intro-band .intro-flex { display: flex; align-items: center; gap: 48px; }
  .intro-band .intro-img { flex: 0 0 340px; border-radius: 2px; overflow: hidden; border: 1px solid var(--line); }
  .intro-band .intro-img img { width: 100%; height: auto; display: block; }
  .intro-band .intro-text { flex: 1; }
  @media (max-width: 760px) {
    .intro-band .intro-flex { flex-direction: column; }
    .intro-band .intro-img { flex: 0 0 auto; width: 100%; }
  }

  /* ===== 製品ブロック ===== */
  .product-block { padding: 64px 0; border-top: 1px solid var(--line); scroll-margin-top: 140px; }
  .product-block:nth-child(odd) { background: var(--paper-warm); }
  .product-block:nth-child(even) { background: var(--paper); }
  .pb-head { display: flex; align-items: baseline; gap: 14px; margin-bottom: 34px; flex-wrap: wrap; }
  .pb-head h3 { font-family: var(--type-serif); font-size: 1.5rem; font-weight: 700; color: var(--ink); }
  .pb-head .pb-badge { font-family: var(--type-mono); font-size: 0.66rem; letter-spacing: 0.1em; color: #fff; background: var(--fiber-deep); padding: 4px 10px; border-radius: 999px; }
  .pb-head .pb-sub { font-size: 0.85rem; color: #7c93a4; }

  .pb-grid { display: grid; grid-template-columns: 300px 1fr; gap: 40px; align-items: start; }
  .pb-media { border: 1px solid var(--line); border-radius: 2px; overflow: hidden; background: #fff; }
  .pb-media img { width: 100%; height: auto; display: block; }
  .pb-media img + img { border-top: 1px solid var(--line); }

  .pb-detail dl { display: grid; grid-template-columns: 96px 1fr; gap: 10px 20px; margin-bottom: 28px; }
  .pb-detail dt { font-family: var(--type-mono); font-size: 0.7rem; letter-spacing: 0.1em; color: var(--fiber-deep); padding-top: 3px; }
  .pb-detail dd { font-size: 0.92rem; color: var(--ink); line-height: 1.85; }
  .pb-detail dd ul { padding-left: 0; list-style: none; }
  .pb-detail dd li { position: relative; padding-left: 1.1em; margin-bottom: 4px; }
  .pb-detail dd li::before { content: '●'; position: absolute; left: 0; font-size: 0.55em; top: 0.55em; color: var(--air-deep); }
  .pb-detail dd.note { color: #4d6478; font-size: 0.86rem; background: var(--paper); border-left: 2px solid var(--fiber); padding: 12px 16px; border-radius: 0 2px 2px 0; }

  .spec-wrap { overflow-x: auto; margin-top: 8px; border: 1px solid var(--line); }
  table.spec-table { width: 100%; border-collapse: collapse; font-size: 0.82rem; min-width: 720px; background: #fff; }
  table.spec-table caption { text-align: left; font-family: var(--type-mono); font-size: 0.68rem; letter-spacing: 0.08em; color: #7c93a4; padding: 10px 14px; background: var(--paper); border-bottom: 1px solid var(--line); }
  table.spec-table th, table.spec-table td { padding: 11px 14px; text-align: left; border-bottom: 1px solid var(--line); white-space: nowrap; }
  table.spec-table th { font-family: var(--type-mono); font-size: 0.68rem; letter-spacing: 0.05em; color: var(--ink-deep); background: var(--paper); text-transform: uppercase; }
  table.spec-table td.num { font-family: var(--type-mono); color: var(--ink); }
  table.spec-table td.price { font-family: var(--type-mono); color: var(--fiber-deep); font-weight: 500; }
  table.spec-table tbody tr:hover { background: var(--theme-soft); }
  table.spec-table tbody tr:last-child td { border-bottom: none; }

  @media (max-width: 860px) {
    .pb-grid { grid-template-columns: 1fr; }
    .pb-media { max-width: 320px; }
  }

  /* ===== 注意事項 ===== */
  .notice-band { padding: 70px 0; background: var(--paper); border-top: 1px solid var(--line); }
  .notice-box { background: var(--paper-warm); border: 1px solid var(--line); border-left: 3px solid var(--air-deep); padding: 30px 34px; border-radius: 0 2px 2px 0; }
  .notice-box h4 { font-family: var(--type-serif); font-size: 1.05rem; margin-bottom: 12px; color: var(--ink); }
  .notice-box p { font-size: 0.9rem; color: #4d6478; line-height: 1.9; margin-bottom: 10px; }
  .notice-box .recommend { font-size: 0.85rem; color: var(--ink); margin-top: 14px; }
  .notice-box .recommend span { display: inline-block; background: var(--theme-soft); color: var(--theme); font-family: var(--type-mono); font-size: 0.72rem; padding: 4px 10px; border-radius: 999px; margin-right: 8px; margin-top: 6px; }