@media screen and (max-width: 750px) {

  /* ==========================================================================
     SP Nav (new) - implant.html only
     ========================================================================== */

  .spnav {
    width: 100%;
    padding: 0 15px 40px;
    max-width: 450px;
    margin: 0 auto;
    font-family: var(--f-yugothic);
  }

  .spnav__sec {
    padding: 0;
    margin-bottom: 14px;
  }

  .spnav ul li {
    margin-bottom: 0;
  }

  .spnav__ttl {
    font-size: 16px;
    font-weight: 600;
    letter-spacing: .08em;
    display: inline-block;
    border-bottom: 1px solid #ffe394;
    padding-bottom: 4px;
    margin-bottom: 10px;
    color: #fff;
  }

  /* ---- 1. CTA ---- */

  .spnav__cta {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin: 0;
    padding: 0;
    list-style: none;
  }

  .spnav__cta-main,
  .spnav__cta-tel {
    width: 100%;
  }

  .spnav__btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    color: #fff;
    text-decoration: none;
    position: relative;
    font-size: 15px;
    font-weight: 600;
  }

  .spnav__btn--rev {
    background: #172F49;
    height: 56px;
    padding: 0 30px;
  }

  .spnav__btn--rev::after {
    content: "";
    position: absolute;
    right: 14px;
    top: 50%;
    width: 8px;
    height: 8px;
    border-top: 2px solid #fff;
    border-right: 2px solid #fff;
    transform: translateY(-50%) rotate(45deg);
  }

  .spnav__btn--tel {
    background: none;
    border: 1px solid #fff;
    height: 52px;
  }

  .spnav__btn--tel .spnav__btn-txt {
    font-size: 22px;
    font-weight: 600;
  }

  .spnav__btn-txt .sm {
    display: block;
    font-size: 11px;
    font-weight: 400;
  }

  .spnav__sub {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 6px;
    margin: 10px 0 0;
    padding: 0;
    list-style: none;
  }

  .spnav__subbtn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    min-height: 56px;
    border: 1px solid #fff;
    color: #fff;
    text-decoration: none;
    text-align: center;
    padding: 5px 4px;
  }

  .spnav__subbtn .spnav__ico {
    width: 16px;
    height: 16px;
  }

  .spnav__subtxt {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1px;
    font-size: 11px;
    line-height: 1.2;
  }

  .spnav__subtxt .sm {
    display: block;
    font-size: 10px;
    line-height: 1.2;
  }

  /* ---- 2. Clinic intro grid ---- */

  .spnav__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
    margin: 0;
    padding: 0;
    list-style: none;
  }

  .spnav__card {
    display: flex;
    align-items: center;
    gap: 8px;
    min-height: 48px;
    padding: 0 22px 0 10px;
    border: 1px solid rgba(255, 255, 255, .7);
    font-size: 14px;
    color: #fff;
    text-decoration: none;
    position: relative;
  }

  .spnav__card::after {
    content: "";
    position: absolute;
    right: 8px;
    top: 50%;
    width: 12px;
    height: 12px;
    transform: translateY(-50%);
    background-image: url("../images/arrow_w.svg");
    background-repeat: no-repeat;
    background-position: center;
    background-size: contain;
  }

  /* ---- 3. Accordion ---- */

  .spnav__acc-btn {
    width: 100%;
    min-height: 52px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 12px;
    background: none;
    border: 1px solid #fff;
    color: #fff;
    font-size: 16px;
    font-weight: 600;
    font-family: var(--f-yugothic);
    cursor: pointer;
    letter-spacing: .08em;
  }

  .spnav__acc-icon {
    width: 10px;
    height: 10px;
    border-right: 2px solid #fff;
    border-bottom: 2px solid #fff;
    transform: rotate(45deg);
    transition: transform .3s;
    flex-shrink: 0;
  }

  .spnav__acc-btn.is-open .spnav__acc-icon {
    transform: rotate(-135deg);
  }

  .spnav__acc-panel {
    display: none;
    border: 1px solid rgba(255, 255, 255, .7);
    border-top: none;
  }

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

  .spnav__list li {
    border-bottom: 1px solid rgba(255, 255, 255, .35);
  }

  .spnav__list li:last-child {
    border-bottom: 1px solid rgba(255, 255, 255, .35);
  }

  .spnav__list--plain li:last-child {
    border-bottom: none;
  }

  .spnav__list a {
    display: flex;
    align-items: center;
    gap: 8px;
    min-height: 46px;
    padding: 0 22px 0 10px;
    font-size: 14px;
    color: #fff;
    text-decoration: none;
    position: relative;
  }

  .spnav__list a::after {
    content: "";
    position: absolute;
    right: 8px;
    top: 50%;
    width: 12px;
    height: 12px;
    transform: translateY(-50%);
    background-image: url("../images/arrow_w.svg");
    background-repeat: no-repeat;
    background-position: center;
    background-size: contain;
  }

  /* ---- 5. Clinic info ---- */

  .spnav__sec--info {
    margin-bottom: 0;
  }

  .spnav__clinic-head {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: #fff;
    margin-bottom: 12px;
  }

  .spnav__clinic-logo {
    display: block;
    width: 60px;
    flex-shrink: 0;
  }

  .spnav__clinic-logo img {
    width: 100%;
    height: auto;
    display: block;
  }

  .spnav__clinic-name {
    display: flex;
    flex-direction: column;
  }

  .spnav__clinic-corp {
    font-size: 12px;
  }

  .spnav__clinic-main {
    font-size: 20px;
    font-weight: 600;
  }

  .spnav__addr {
    font-size: 13px;
    line-height: 1.6;
    margin-bottom: 8px;
  }

  .spnav__map {
    margin-bottom: 8px;
  }

  .spnav__map a {
    color: #fff;
    font-size: 13px;
    text-decoration: underline;
  }

  .spnav__tel {
    margin-bottom: 12px;
  }

  .spnav__tel a {
    font-size: 24px;
    font-weight: 600;
    color: #fff;
    text-decoration: none;
  }

  .spnav__hours {
    border-top: 1px solid rgba(255, 255, 255, .6);
    padding-top: 10px;
    margin-bottom: 10px;
  }

  .spnav__hours-ttl {
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 4px;
  }

  .spnav__hours-txt {
    font-size: 12px;
    line-height: 1.7;
  }

  .spnav__cal {
    margin-bottom: 8px;
  }

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

  .spnav__close {
    font-size: 12px;
  }

  /* ---- Icons (white line SVG, data-URI) ---- */

  .spnav__ico {
    display: inline-block;
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    background-repeat: no-repeat;
    background-position: center;
    background-size: contain;
  }

  .spnav__ico--calendar {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23fff' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Crect x='3' y='5' width='18' height='16' rx='2'/%3E%3Cline x1='3' y1='10' x2='21' y2='10'/%3E%3Cline x1='8' y1='2.5' x2='8' y2='6.5'/%3E%3Cline x1='16' y1='2.5' x2='16' y2='6.5'/%3E%3C/svg%3E");
  }

  .spnav__ico--tel {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23fff' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6.5 3.5l3 4-2 2.2c1 2.3 3 4.3 5.3 5.3l2.2-2 4 3v3a1.5 1.5 0 01-1.6 1.5C10.9 20 4 13.1 3.5 5.6A1.5 1.5 0 015 4h1.5z'/%3E%3C/svg%3E");
  }

  .spnav__ico--line {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23fff' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M21 11.5a7.5 6.2 0 01-7.5 6.2c-1 0-2-.15-2.9-.45L6.5 19l1.1-3.1A6.1 6.1 0 013 11.5 7.5 6.2 0 0110.5 5.3 7.5 6.2 0 0121 11.5z'/%3E%3C/svg%3E");
  }

  .spnav__ico--video {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23fff' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Crect x='2.5' y='6.5' width='13' height='11' rx='1.5'/%3E%3Cpath d='M15.5 10.5l6-3.5v10l-6-3.5z'/%3E%3C/svg%3E");
  }

  .spnav__ico--mail {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23fff' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Crect x='2.5' y='5' width='19' height='14' rx='1.5'/%3E%3Cpath d='M3 6.5l9 6.5 9-6.5'/%3E%3C/svg%3E");
  }

  .spnav__ico--concept {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23fff' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M12 3l1.8 5.2L19 10l-5.2 1.8L12 17l-1.8-5.2L5 10l5.2-1.8z'/%3E%3Cpath d='M18.5 15.5l.7 2 2 .7-2 .7-.7 2-.7-2-2-.7 2-.7z'/%3E%3C/svg%3E");
  }

  .spnav__ico--doctor {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23fff' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='12' cy='8' r='3.5'/%3E%3Cpath d='M4.5 20c0-4.1 3.4-7 7.5-7s7.5 2.9 7.5 7'/%3E%3C/svg%3E");
  }

  .spnav__ico--price {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23fff' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='12' cy='12' r='9'/%3E%3Cpath d='M9 8l3 4.5V17M15 8l-3 4.5M9.5 12.5h5M9.5 14.5h5'/%3E%3C/svg%3E");
  }

  .spnav__ico--case {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23fff' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M8.5 2.7h7c1.9 0 3.1 1.4 3.1 3.3 0 1.6-.5 3-.9 4.7-.4 1.8-.7 3.4-.9 5.2-.2 1.7-.4 3.2-.9 4.2-.3.6-.8 1-1.3 1-.7 0-1.1-.7-1.2-1.9l-.6-4.5c-.1-.8-.4-1.2-.8-1.2s-.7.4-.8 1.2l-.6 4.5c-.1 1.2-.5 1.9-1.2 1.9-.5 0-1-.4-1.3-1-.5-1-.7-2.5-.9-4.2-.2-1.8-.5-3.4-.9-5.2-.4-1.7-.9-3.1-.9-4.7 0-1.9 1.2-3.3 3.1-3.3z'/%3E%3C/svg%3E");
  }

  .spnav__ico--access {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23fff' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M12 21s7-6.3 7-11.5A7 7 0 105 9.5C5 14.7 12 21 12 21z'/%3E%3Ccircle cx='12' cy='9.5' r='2.5'/%3E%3C/svg%3E");
  }

  .spnav__ico--info {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23fff' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Crect x='4' y='9' width='16' height='12' /%3E%3Cpath d='M4 9l8-5.5L20 9'/%3E%3Cline x1='9' y1='21' x2='9' y2='14'/%3E%3Cline x1='15' y1='21' x2='15' y2='14'/%3E%3C/svg%3E");
  }

  .spnav__ico--flow {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23fff' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 3.5h9.5L20 8v12.5H6z'/%3E%3Cpath d='M15.5 3.5V8H20'/%3E%3Cline x1='9' y1='12' x2='16' y2='12'/%3E%3Cline x1='9' y1='15.5' x2='16' y2='15.5'/%3E%3C/svg%3E");
  }

  .spnav__ico--tooth {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23fff' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M8.5 2.7h7c1.9 0 3.1 1.4 3.1 3.3 0 1.6-.5 3-.9 4.7-.4 1.8-.7 3.4-.9 5.2-.2 1.7-.4 3.2-.9 4.2-.3.6-.8 1-1.3 1-.7 0-1.1-.7-1.2-1.9l-.6-4.5c-.1-.8-.4-1.2-.8-1.2s-.7.4-.8 1.2l-.6 4.5c-.1 1.2-.5 1.9-1.2 1.9-.5 0-1-.4-1.3-1-.5-1-.7-2.5-.9-4.2-.2-1.8-.5-3.4-.9-5.2-.4-1.7-.9-3.1-.9-4.7 0-1.9 1.2-3.3 3.1-3.3z'/%3E%3C/svg%3E");
  }

  .spnav__ico--blog {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23fff' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M4 20l.8-4L16.5 4.3a1.5 1.5 0 012.1 0l1.1 1.1a1.5 1.5 0 010 2.1L8 19.2z'/%3E%3Cline x1='14.5' y1='6.3' x2='17.7' y2='9.5'/%3E%3C/svg%3E");
  }

  .spnav__ico--news {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23fff' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9a6 6 0 0112 0c0 5 1.5 6.5 1.5 6.5h-15S6 14 6 9z'/%3E%3Cpath d='M10 19a2 2 0 004 0'/%3E%3C/svg%3E");
  }


  /* ==== specificity 対策 ====
     responsive.css の `.menu_link li a { display:block }` (0,2,1) と
     styles.css の `.menu_link { display:flex }` が、上記の単一クラス指定 (0,1,0) に
     競り勝って flex レイアウトを無効化するため、詳細度を上げて打ち消す。 */
  .spnav ul.spnav__list {
    display: block;
  }

  .spnav ul li a.spnav__btn,
  .spnav ul li a.spnav__card,
  .spnav ul li a.spnav__subbtn,
  .spnav ul.spnav__list li a {
    display: flex;
  }

  .spnav ul li a.spnav__subbtn {
    flex-direction: column;
  }

  .spnav ul li a.spnav__btn {
    height: auto;
    min-height: 56px;
    padding-top: 6px;
    padding-bottom: 6px;
  }

  .spnav ul li a.spnav__btn .spnav__btn-txt {
    display: flex;
    flex-direction: column;
    align-items: center;
    line-height: 1.3;
  }

}