/* =========================================================
   トップLP (soryuusui.jp) — 実測値ベース
   デスクトップ(>840): 左25vwナビ固定 + 右75vwに川背景固定 + 中央480pxカラム
   タブレット(<=840): ナビ・背景なし、480pxカラム中央
   スマホ(<=540): カラム=100vw
   ========================================================= */

/* ---------- 固定背景 & 左ナビ ---------- */
.river {
  position: fixed; top: 0; left: 25vw; width: 75vw; height: 100vh;
  z-index: -3; opacity: .8;
  background: url("../img/opt/river-bg.webp") center / cover no-repeat;
}
.side {
  position: fixed; top: 0; left: 0; width: 25vw; height: 100vh; z-index: 5;
  background: linear-gradient(45deg, #D4EFFA 0%, #F4FBFE 100%);
  display: flex; align-items: center; justify-content: center;
}
.side-inner { width: 222px; padding-bottom: 20px; }
.side-nav a {
  display: flex; align-items: center; justify-content: space-between;
  height: 46px; padding: 10px; border-bottom: 1px solid #fff;
  font-family: var(--f-mg); font-weight: 600; font-size: 18px; line-height: 1.4; color: #000;
}
.side-nav a .material-icons { font-size: 20px; color: #000; }
.side-nav a:last-child .material-icons { font-size: 18px; }
.side-btn {
  display: flex; align-items: center; justify-content: center; gap: 10px;
  width: 202px; height: 50px; margin: 20px 0 0 10px; padding: 0 15px;
  border-radius: 8px; box-shadow: var(--shadow); color: #fff;
  font-family: var(--f-mg); font-weight: 600;
}
.side-btn.line { background: var(--line); font-size: 18px; }
.side-btn.cart { background: #027BC3; width: 201px; padding: 0 10px; font-size: 16px; line-height: 1.2; text-align: center; gap: 8px; white-space: nowrap; }
.side-btn.cart .material-icons { font-size: 28px; }

/* ---------- 中央カラム ---------- */
.wrap { margin-left: 25vw; width: 75vw; display: flex; justify-content: center; }
.col { width: 480px; background: #fff; }
.col > img, .col > picture > img, .col > a > img, .col .full { width: 100%; height: auto; }

@media (max-width: 840px) {
  .river, .side { display: none; }
  .wrap { margin-left: 0; width: 100%; }
}
@media (max-width: 540px) {
  .col { width: 100%; }
}

/* ---------- 価格ブロック ---------- */
.offer { background: var(--blue); padding: 20px 20px 19px; }
.offer.shower { background: var(--pale); }
.offer .lead {
  margin: 0 0 20px 40px; width: 360px;
  font-family: var(--f-mg); font-weight: 600; font-size: 24px; line-height: 1.4; color: #fff;
}
.offer.shower .lead { color: var(--blue); }
.offer .card { background: #fff; border-radius: 8px; padding: 20px; }
.offer .top { display: flex; }
.offer .top .txt { padding-left: 9px; padding-top: 20px; flex: 1 1 auto; }
.offer.shower .pimg { order: -1; margin-left: 4px; }
.offer.shower .top .txt { padding-left: 10px; }
.offer .pname {
  width: 185px; font-family: var(--f-mg); font-weight: 600; font-size: 20px; line-height: 1.4; color: var(--navy);
}
.offer.shower .pname { width: 200px; color: var(--blue); }
.offer .psub { font-family: var(--f-roboto); font-size: 14px; line-height: 1.4; color: var(--navy); }
.offer.shower .psub { color: var(--blue); }

.offer .price { display: flex; margin-top: -12px; color: var(--navy); font-family: var(--f-roboto); }
.offer.shower .price { color: var(--blue); }
.offer .price .num { font-size: 64px; font-weight: 500; line-height: 1.4; }
.offer .price .unit { display: flex; flex-direction: column; flex: 0 0 auto; padding-top: 34px; margin-left: 3px; white-space: nowrap; }
.offer .price .tax { font-size: 10px; font-weight: 700; line-height: 1.4; }
.offer .price .yen { font-size: 20px; font-weight: 700; line-height: 1.4; margin-top: -2px; }
.offer .pimg { flex: 0 0 160px; width: 160px; height: 160px; }
.offer .note {
  width: 336px; margin: -2px auto 0; font-family: var(--f-lato); font-size: 12px; line-height: 1.58; color: var(--ink);
}
.offer .gift {
  position: relative; margin: 20px 0 0 3px; width: 395px; height: 37px; padding: 6px;
  background: var(--green); border-radius: 12px; color: #fff;
  display: flex; align-items: center; gap: 0;
}
.offer .gift .g1 { font-family: var(--f-lato); font-size: 14px; line-height: 1.58; white-space: nowrap; }
.offer .gift .g2 { font-family: var(--f-mg); font-weight: 600; font-size: 16px; line-height: 1.58; white-space: nowrap; }
.offer .gift .material-icons {
  position: absolute; left: 264px; top: 7px; font-size: 72px; color: var(--green); pointer-events: none;
}
.offer .free { display: flex; gap: 10px; margin-top: 22px; }
.offer .free span {
  width: 195px; height: 30px; padding: 4px 12px; border: 1px solid #000; text-align: center;
  font-family: var(--f-lato); font-size: 14px; line-height: 1.4; color: var(--ink);
}
.offer .btns { display: flex; gap: 10px; margin-top: 20px; position: relative; }
.offer .btn {
  position: relative; display: flex; align-items: center; justify-content: center;
  width: 195px; height: 80px; padding: 24px 24px 20px; border-radius: 16px; box-shadow: var(--shadow);
  color: #fff; font-family: var(--f-mg); font-weight: 600; font-size: 20px; line-height: 20px; text-align: center;
}
.offer .btn.normal { background: var(--btn-gray); }
.offer .btn.line { background: var(--green); line-height: 22px; padding: 24px 0 20px; }
.offer .btn .tag {
  position: absolute; top: -11px; left: 50%; transform: translateX(-50%);
  width: 68px; height: 26px; padding: 5px; border-radius: 8px; background: #fff;
  font-size: 14px; line-height: 14px; white-space: nowrap;
}
.offer .btn.normal .tag { color: var(--btn-gray); border: 1px solid var(--btn-gray); }
.offer .btn.line .tag { color: var(--green); border: 1px solid var(--green); }

@media (max-width: 540px) {
  .offer .lead { margin-left: 18px; width: 300px; font-size: 20px; }
  .offer .top .txt { padding-left: 6px; }
  .offer.shower .top .txt { padding-left: 10px; }
  .offer .pname, .offer.shower .pname { width: 140px; font-size: 14px; }
  .offer .psub { font-size: 10px; }
  .offer .price .num { font-size: 48px; }
  .offer .price .unit { padding-top: 30px; }
  .offer .price .tax { font-size: 6px; }
  .offer .price .yen { font-size: 14px; }
  .offer .pimg { flex-basis: 120px; width: 120px; height: 120px; }
  .offer .note { width: 280px; font-size: 10px; }
  .offer .gift { margin: 21px 0 0 0; width: 295px; height: 31px; }
  .offer .gift .g1 { font-size: 10px; white-space: nowrap; }
  .offer .gift .g2 { font-size: 12px; white-space: nowrap; }
  .offer .gift .material-icons { left: 192px; top: 0; }
  .offer .free { gap: 10px; margin: 21px -7px 0; }
  .offer .free span { flex: 0 0 150px; width: 150px; height: 24px; font-size: 10px; white-space: nowrap; }
  .offer .btns { gap: 10px; margin: 20px -7px 0; }
  .offer .btn { flex: 0 0 150px; width: 150px; height: 70px; padding: 24px 8px 20px; font-size: 16px; line-height: 18px; white-space: nowrap; }
  .offer .btn.line { line-height: 17.6px; padding: 24px 0 20px; }
}

/* ---------- 蛇口一覧CTA行 ---------- */
.faucet-cta { padding: 20px 0 21px; text-align: center; }
.faucet-cta .tag {
  display: inline-block; width: 236px; height: 26px; padding: 5px; border: 1px solid var(--red); border-radius: 4px;
  background: #fff; color: var(--red); font-family: var(--f-mg); font-weight: 600; font-size: 14px; line-height: 14px;
  position: relative; z-index: 1;
}
.faucet-cta .btn {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  width: 256px; height: 66px; margin: -8px auto 0; padding: 24px 24px 20px;
  background: var(--red); border-radius: 4px; box-shadow: var(--shadow);
  color: #fff; font-family: var(--f-mg); font-weight: 600; font-size: 20px; line-height: 20px;
}
.faucet-cta .btn .material-icons { font-size: 20px; }
.faucet-cta .note {
  width: 388px; margin: 8px auto 0; padding: 5px; background: #fff; border-radius: 4px;
  font-family: var(--f-mg); font-weight: 600; font-size: 14px; line-height: 21px; color: var(--ink2);
}
@media (max-width: 540px) {
  .faucet-cta .note { width: calc(100% - 40px); }
}

/* ---------- PFOS/PFOAボタン ---------- */
.pfos { padding: 0 0 60px; }
.pfos .btn {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  width: 340px; height: 42px; margin: 0 auto; padding: 12px 24px;
  background: var(--ink2); border-radius: 4px; box-shadow: var(--shadow);
  color: #fff; font-family: var(--f-mg); font-weight: 600; font-size: 16px; line-height: 16px;
}
.pfos .btn .material-icons { font-size: 18px; }

/* ---------- キャンペーン詳細 ---------- */
.campaign { padding: 35px 35px 48px; background: #EAD56C; font-family: var(--f-roboto); font-size: 16px; line-height: 1.4; color: var(--ink); }
.campaign .h { padding-left: 10px; margin-bottom: 11px; }
.campaign ul { list-style: disc; padding-left: 30px; }
.campaign li + li { margin-top: 4px; }
.campaign-note { padding: 35px; background: #fff; font-family: var(--f-lato); font-size: 14px; line-height: 1.4; color: var(--ink); }
.campaign-note ul { list-style: disc; padding-left: 30px; }
.campaign-note a { color: #007CFF; }

/* ---------- 前提条件 ---------- */
.premise { padding: 10px 20px 30px; background: #fff; }
.premise p + p { margin-top: 11px; }
.premise p { width: 340px; margin: 0 auto; font-family: var(--f-lato); font-size: 14px; line-height: 1.4; color: var(--ink); }
@media (max-width: 540px) {
  .premise p { width: 281px; font-size: 12px; }
}

/* ---------- よくあるご質問(LP内) ---------- */
.lp-faq { background: var(--fblue); padding: 36px 24px; }
.lp-faq h2 {
  margin-bottom: 24px; text-align: center; color: #fff;
  font-family: var(--f-roboto); font-weight: 700; font-size: 24px; line-height: 1.4;
}

/* ---------- 製品情報 ---------- */
.spec { background: rgba(87, 168, 215, .1); padding: 36px 24px; }
.spec h2 {
  margin-bottom: 24px; text-align: center; color: var(--fblue);
  font-family: var(--f-roboto); font-weight: 700; font-size: 24px; line-height: 1.4;
}
.spec .card { background: #fff; border-radius: 12px; padding: 20px; }
.spec .card + .card { margin-top: 24px; }
.spec dl { padding-left: 10px; }
.spec dt { padding-top: 10px; font-family: var(--f-mg); font-weight: 500; font-size: 16px; line-height: 22px; color: var(--ink); }
.spec dt:first-child { padding-top: 0; }
.spec dd { padding: 10px 0 11px; border-bottom: 1px solid #000; font-family: var(--f-roboto); font-size: 16px; line-height: 22px; color: var(--ink); }
.spec dd.name { color: var(--ink2); }